Understanding How Our Lungs Fight Fungus
Airway epithelial cells (AECs) are a key component of the human respiratory system: The first line of defence against airborne pathogens such as Aspergillus fumigatus (Af), AECs play a crucial role in initiating host defence and controlling immune responses and are important in maintaining respiratory health and preventing infections that can lead to conditions such as aspergillosis. Research by the University of Manchester’s Dr Margherita Bertuzzi and her team sought to understand how AECs combat Af and what leads to vulnerabilities in these defences, particularly in individuals with underlying health conditions.
Previous work by Dr Bertuzzi and her team demonstrated that AECs are effective in stopping the fungus from causing harm when they are functioning well. However, in people who are at higher risk, like those with weakened immune systems or existing lung conditions, if these cells are not working correctly, the fungus can take advantage of this situation.
This new research by Dr Bertuzzi and her team aimed to explore how AECs stop the fungus in healthy people and what goes wrong in people who get sick. The team looked closely at the interaction between the fungus and lung cells from both healthy individuals and those with certain diseases. Using advanced scientific methods, the team was able to observe the interactions between the lung cells and the fungus at a very detailed level.
What They Found
Experiments showed that the stage of fungal growth was important and a surface carbohydrate – mannose (a sugar) also had a role in the process.
Specifically, they discovered that the fungus is more likely to be taken up by lung cells when it has been growing for a few hours compared to when it’s just a fresh spore. Swollen fungal spores that were locked at 3 and 6 hours of germination were 2-fold more readily internalised than those locked at 0 hours. They also identified that a sugar molecule called mannose on the surface of the fungus plays a big role in this process.
Mannose is a type of sugar molecule that can be found on the surface of various cells, including those of pathogens like Aspergillus fumigatus. This sugar plays an important role in the interactions between the fungus and the host’s cells, particularly the AECs lining the lungs. In a healthy immune response, mannose on the surface of pathogens can be recognised by mannose receptors on immune cells, triggering a series of immune responses aimed at eliminating the pathogen. However, Aspergillus fumigatus has evolved to exploit this interaction, allowing it to adhere to and invade lung cells more effectively. The presence of mannose on the fungus’ surface facilitates its binding to mannose-binding lectins (MBLs) (proteins that bind specifically to mannose) on the surface of lung cells. This binding can promote the internalisation of the fungus into the lung cells, where it can reside and potentially cause infection.
The research highlighted the possibility of manipulating this interaction as a means to combat fungal infections. By adding mannose or mannose-binding lectins like Concanavalin A, researchers could significantly reduce the fungus’s ability to invade lung cells. This reduction was accomplished by essentially “competing” with the fungus for the binding sites on the lung cells or by directly blocking the fungal mannose, thereby inhibiting the interaction that facilitates fungal infection.
Why does it matter?
Understanding these interactions gives us important insights into how our lungs protect us from fungal infections and what goes wrong in people who are vulnerable to such infections. This knowledge could help in creating new treatments against pathogens like Aspergillus fumigatus.
You can read the full abstract here.
NHS Complaint Procedures
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The NHS values feedback, both positive and negative, as it contributes to service improvement. If you are unhappy about the care, treatment, or service you've experienced from the NHS or a GP, you are entitled to make your voice heard. Your feedback could instigate changes that benefit both you and others in the future, and there are many reasons why it is important:
Accountability
Healthcare providers are responsible for delivering a high standard of care. When they fall short, they should be held accountable. Complaints can serve as a mechanism for this accountability.
Quality Improvement
Feedback is essential for any organisation that aims to improve. By pointing out what went wrong, you can help the NHS identify areas for improvement. This can lead to changes in procedures, training, and resource allocation, ultimately raising the quality of care for everyone.
Patient Safety
If you've experienced a lapse in the standard of care, others may have too. By bringing attention to the issue, you could be helping to prevent future mistakes that compromise patient safety.
Transparency
Hospitals and GP practices benefit from being transparent about their successes and failures. Complaints can be a form of data that helps the public and the organisation understand how well it is performing.
Empowerment
Making a complaint can be empowering for patients and families. It gives you a voice and can help you feel like an active participant in your healthcare rather than a passive recipient.
Legal and Ethical Reasons
In some cases, complaints may lead to legal action or disciplinary measures against healthcare providers who have been negligent or have violated professional standards.
Resource Allocation
Complaints can highlight areas where resources are lacking. This could lead to increased funding or other resources being allocated to address the issue.
Public Trust
Maintaining public trust is crucial for a publicly funded system like the NHS. Addressing complaints effectively is an integral part of maintaining this trust.
Understanding Your Rights
Before you proceed with a complaint, it's crucial to understand your rights as a patient. The NHS Constitution outlines these rights, which include:
- The right to high-quality care
- The right to be treated with dignity and respect
- The right to confidentiality
- The right to complain and have your complaint investigated
Initial Steps to Take
Identify the Issue
Before making a complaint, clearly identify the issue you're facing. Is it related to:
- Medical treatment?
- Staff attitude?
- Waiting times?
- Facilities?
Clearly understanding the issue will help you articulate your complaint more effectively.
Direct Communication with the Service Provider
If you're unhappy with an NHS service, it's often beneficial to discuss your concerns directly with the service, either with the clinician or the service manager. Many issues can be sorted out swiftly at this stage.
Patient Advice and Liaison Service (PALS)
Before moving on to formal complaints, you may want to speak to the Patient Advice and Liaison Service (PALS) who can:
•Help you with health-related questions
•Help resolve concerns or problems
•Tell you how to get more involved in your own healthcare
PALS can give you information about:
•The NHS
•The NHS complaints procedure
•Support groups outside the NHS
You can usually find a PALS office in NHS hospitals, or you can search for your nearest PALS online.
NHS Complaints Advocate
If you're contemplating making a formal complaint, you can seek assistance from an NHS complaints advocate. They can guide you in drafting a complaint letter and may accompany you to meetings. However, they cannot complain on your behalf.
Informal Complaints
Verbal Complaints
Sometimes, issues can be resolved quickly through informal channels. You can start by speaking directly to the clinician or a manager. This is often the quickest way to address minor concerns.
Written Complaints
If you're uncomfortable speaking directly or the issue is more serious, you can write an informal complaint via email or a letter. Make sure to include:
- Your name and contact details
- A clear description of the issue
- What you would like to happen as a result
Formal Complaints
Identifying the Appropriate Body
You can complain directly to the NHS service provider (such as a GP, dentist, or hospital) or to the commissioner of the services. If your complaint involves multiple organisations, you need only file one complaint, and the organisation that receives it will coordinate with the others.
Time Constraints
Complaints should ideally be made within 12 months of the incident or of becoming aware of the issue. This timeframe can be extended under specific conditions.
Methods of Filing a Complaint
Complaints can be lodged verbally, in writing, or via email. If you're filing a complaint on someone else's behalf, their written consent will be required.
What to Anticipate After Filing a Complaint
- Acknowledgement: You should anticipate an acknowledgement and an offer for a discussion regarding handling your complaint within three working days.
- Investigation: Your complaint will undergo an investigation, and you'll subsequently receive a written response outlining the findings, apologies if warranted, and actions taken as a result of your complaint.
- Ombudsman: If you're not content with the outcome, you can escalate your complaint to the Parliamentary and Health Service Ombudsman.
Alternative Avenues for Feedback
- Friends and Family Test (FFT): A quick and anonymous method for offering feedback.
- Patient Reported Outcome Measures (PROMs): Specifically for patients who have recently undergone hip or knee replacement surgery.
Your opinion matters. If you're dissatisfied with the healthcare services you've received, you have the right to file a complaint. However, it's worth noting that the way complaints are made and handled is also important. Complaints should be constructive, specific, and based on facts to be most effective. They should be made through the appropriate channels and following the procedures set out by the healthcare provider.
For more in-depth information, you can visit the NHS website.
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Living with & Managing Chronic Illness
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As many of you know, chronic conditions like Aspergillosis require more than just medical intervention. Chronic illnesses necessitate emotional resilience, adaptability, understanding, and physical strength. Patient-centric strategies have proven successful in managing illness and improving overall well-being and health outcomes, irrespective of the condition. The journey can be challenging, particularly when first diagnosed, but having an illness like Aspergillosis doesn't mean enduring a life of constant suffering.
What do we mean by manageable?
"Manageable" does not mean that your illness will completely disappear or you will no longer feel its effects. Instead, it means that the symptoms can be controlled to such an extent that they do not dominate your life or altogether remove your ability to function. Managing a chronic condition involves developing a comprehensive and tailored approach incorporating medication, lifestyle adjustments, emotional well-being, and social support.
Chronic conditions require more than medication
Understanding Your Illness
Knowledge is power. Understanding your illness, its symptoms, triggers, and progression will help you manage it more effectively. Ask your doctor(s) questions, do your own research, and consider joining support groups where you can learn from others' experiences.
Acknowledging limitations
When we discuss acknowledging limitations while living with Aspergillosis, there's a metaphor that captures this struggle: The Spoon Theory.
The Spoon Theory, conceived by Christine Miserandino, is a valuable metaphor within the chronic illness community to explain the energy required to live with such conditions. In this analogy, 'spoons' represent energy units. Each day, a person has a finite number of 'spoons' and must budget their activities to ensure they don't run out of 'spoons' before the day ends.
So, how does this relate to acknowledging limitations with Aspergillosis?
Physical Limitations
With Aspergillosis, common physical symptoms like fatigue or breathlessness may require more 'spoons' than usual. Understanding your body's signals and resting when necessary helps you conserve your 'spoons'.
Emotional Limitations
Chronic illness can be emotionally draining. It's normal to feel uncertain and anxious about your condition. According to the National Institute of Mental Health (NIMH), people with chronic illnesses may be more likely to suffer from depression. Therefore, depression is a common complication of chronic illness.
Managing feelings of anxiety or depression requires 'spoons'. Acknowledging your emotional health and seeking help and support when you need it can assist in managing your emotional energy better.
Social Limitations
Every social activity costs 'spoons'. While it's crucial to maintain a social life, it's equally important to recognise when you might need to prioritise rest and recovery.
Work Limitations
The energy expended at work needs to be factored into your 'spoon' budget. Sometimes, it may require a conversation with your employer to adjust your workload or responsibilities to accommodate your health needs.
Understanding and applying the Spoon Theory to your life can be a powerful tool in acknowledging and managing your limitations. It's not about resigning yourself to these limitations but prioritising and becoming effective at working around them.
Each of you will have a different number of 'spoons' each day, and what may cost one spoon for some may cost five for another. That's why it's so crucial to respect and acknowledge our boundaries.
The power of exercise
Exercise plays an integral role in maintaining our health and well-being. Regular physical activity can significantly improve quality of life, boost mood, enhance lung function, and strengthen the immune system. However, the thought of exercise might seem daunting given the physical constraints of Aspergillosis. But it's about finding what works best for you.
Exercise that suits your abilities
Remember, the objective is not to exhaust yourself but to gradually improve your endurance and strength within your limits. Lower-intensity activities such as walking, stretching exercises, or chair-based workouts can be beneficial starting points. Even small activities like light household chores can contribute to your daily exercise.
Pulmonary Rehabilitation
These are programmes specifically designed for people with lung conditions. They involve a combination of exercises to improve lung function, education, and emotional support. Trained healthcare professionals supervise these programmes to ensure safety and efficacy.
Breathing exercises
Exercises like pursed-lip or diaphragmatic breathing can improve lung capacity and help manage breathlessness, a common symptom in Aspergillosis.
Yoga and Meditation
Gentle yoga poses combined with mindful breathing can improve flexibility, balance, and strength while also helping with stress management.
Staying consistent
The key is regularity rather than intensity. Even 10-15 minutes of exercise daily can make a difference. As your endurance builds, you can gradually increase the duration and possibly the intensity of your workouts.
Work with professionals
Always consult your care team before starting a new exercise regimen. They can guide you.
Listen to your body
Most importantly, listen to your body. If you feel excessively tired or experience difficulty breathing, it's time to rest. Remember, acknowledging your limits is not a weakness; it's an essential part of managing your health.
Mental health matters
Living with a chronic illness like Aspergillosis can be physically challenging, but it also exacts a toll on our mental health. Anxiety, depression, stress, and feelings of isolation are not uncommon. Acknowledging these emotions and finding ways to manage them is as important as managing the physical symptoms of the illness.
Understanding the Impact
Chronic illnesses can lead to a range of emotional responses: fear about what the future holds, frustration over physical limitations, feelings of isolation due to changes in lifestyle or others' inability to fully understand your experience. Understanding that these are normal reactions to your situation is the first step towards addressing them.
Communication
One of the most powerful tools in managing mental health is open communication. This could be with family, friends, a support group, or a professional counsellor. Discussing your feelings can provide relief and offer new perspectives.
Professional Help
Psychologists, psychiatrists, and therapists can provide strategies to cope with the stress, anxiety, and depression that can accompany chronic illnesses. Cognitive-behavioural therapy, mindfulness-based stress reduction, and other techniques can help you navigate your emotional journey.
Peer Support
We talk about this a lot, and many of you reading this will already realise the benefits because you attend our weekly meetings. Connecting with others who are dealing with similar experiences can be incredibly helpful. Support groups provide a platform to share experiences, learn from others, and gain emotional comfort from knowing you're not alone.
Self-care
Prioritise activities that you enjoy and that help you relax. This could be reading, listening to music, gardening, or any hobby that provides a sense of calm. Mindfulness exercises, yoga, and meditation can also be effective in reducing stress and promoting mental well-being.
Depression is not a weakness
It's not just the physical discomfort and limitations that pose a challenge. Still, the emotional burden carried with a persistent health condition can also be substantial. Thus, depression is a common complication of chronic illness. Still, it doesn't have to be a normal part of chronic illness. Depression can manifest through persistent sadness, loss of interest in previously enjoyed activities, difficulty sleeping, or changes in appetite. It's important to recognise that depression is not a sign of weakness or a normal part of living with a chronic illness. It's a serious but treatable condition. If you or someone you care for shows signs of depression, seeking help from healthcare professionals is crucial. Therapies such as cognitive-behavioural therapy, medication, or a combination of both can effectively manage depression. Remember, taking care of your mental health is a critical part of managing a chronic illness.
Remember, it's okay to have tough days. Your illness does not define you, and it's okay to ask for help when needed. Celebrate your achievements, no matter how small, and focus on the strengths that help you navigate your challenges.
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Learning to control antifungal drug resistance from the environment
Spores of fungi including Aspergillus fumigatus, the main species that causes aspergillosis, have been found to propagate the growth of strains of fungi that are already resistant to those antifungal medications most commonly used in medical clinics to treat aspergillosis. This can render the most common treatments for aspergillosis useless, which is a concern for doctors.
Where do these strains come from? Most experts suggest that the use of commercial fungicides by farmers exposes the fungus to pesticides that closely resemble the antifungal drugs used by doctors. This exposure is likely to enrich the numbers of resistant spores found in the environment ie in compost, soil, and of course in/on the plant material produced by the farmers e.g. food crops, and flowering plants.
Can we stop using these antifungal chemicals as pesticides? A multi-disciplinary meeting designed to bring together experts from all sides of the debate took place in London on 13th July and those representing the growers outlined how important it is that farmers use these fungicides to prevent crop damage and to produce enough food to feed us all! Completely stopping their use on crops does not seem to be an option.
Given that it seems that there will be antifungal-resistant spores in the environment we live in for the foreseeable future we need to:
- know where they are
- know how to avoid inhaling them
Where might patients come into contact with most antifungal-resistant spores?
Farmers use antifungal pesticides on many crops including:
- Fruits: Apples, grapes, peaches, strawberries, and tomatoes
- Vegetables: Potatoes, onions, corn, and soybeans
- Grains: Wheat, corn, and rice.
- Nursery crops: Roses, trees, and shrubs
Researchers have found antifungal-resistant Aspergillus fumigatus spores on many of these crops or the soil around them, at low levels (0 - 10% of samples).
Is this level of antifungal-resistant spores increasing?
When scientists looked at spore numbers they found that the number of resistant spores increased during the growing season as antifungal pesticides were applied to the crops, but this resistance did not survive the winter (1) and levels were back down to where they were the previous year.
It is apparent that handling crops, or the soil around them is a potential way to come into contact with some spores that are resistant to antifungal medications given in the clinic.
What is the likelihood of these spores causing an antifungal-resistant infection?
Researchers (1) have looked at how resistant the resistant spores are to the level of antifungal medication they will be exposed to in a patient and found that the proportion of the isolates that were resistant to the levels of antifungal medication used in patients was 1-4% - so very low.
Which crops are worst affected?
The most common material found to contain antifungal-resistant material was plant material waste originating from cut flowers and flowering bulbs and other types of waste produced in the industry in The Netherlands (2), so it is clear that composting can promote the growth of resistant spores. Ways to prevent this from happening are under development.
Other materials tested were household waste, wheat grain, poultry manure, cattle manure, horse manure, maize silage & fruit waste and of those antifungal-resistant spores were found only in fresh household waste.
Other researchers across the world (3) have detected antifungal-resistant spores in a range of crops and soils. Highest numbers of resistant spores (or perhaps in places where most research has been done) tend to be in India (rice), China (maize, some house plants, potato), USA (wheat, roses, apples), The Netherlands (orchids), Spain (onions, strawberries), Colombia (carrots) & Italy (grapes).
These were not exhaustive studies and we know that Aspergillus fumigatus (i.e. not antifungal-resistant) itself is found on far more plants/fruits/vegetables, so it stands to reason that if they are treated with antifungal pesticides then it may be possible to isolate resistant spores from them. It is clear that although there is a risk of inhaling antifungal-resistant spores from this plant material, the risk to the domestic consumer is low. Nonetheless, out of an abundance of caution, it might be best to take a few precautions:
a. Avoid handling cut flowers and flowering bulbs from The Netherlands
b. After purchase wash fruit and vegetables prior to storage in the home
c. Dispose of household waste in a timely manner
Action is being proposed and taken nationally and internationally to reduce the risk to aspergillosis patients in particular of inhaling antifungal-resistant spores of A. fumigatus and other fungi (4). Research is ongoing to learn more about what are the causal factors responsible for the increase in resistant spores, which are the main risks to human health and what we can do about it.
In time we should be able to prevent the growth of resistant isolates, ensuring that we have useful antifungal medication for years to come.
1. Effects of Agricultural Fungicide Use on Aspergillus fumigatus Abundance, Antifungal Susceptibility, and Population Structure
Authors: Amelia E. Barber https://orcid.org/0000-0002-3399-1037, Jennifer Riedel, Tongta Sae-Ong, Kang Kang, Werner Brabetz, Gianni Panagiotou, Holger B. Deising, Oliver Kurzai https://orcid.org/0000-0002-7277-2646AUTHORS INFO & AFFILIATIONS
DOI: https://doi.org/10.1128/mbio.02213-20
2. Emerg Infect Dis. 2019 Jul; 25(7): 1347–1353. doi: 10.3201/eid2507.181625
Environmental Hotspots for Azole Resistance Selection of Aspergillus fumigatus, the Netherlands
Sijmen E. Schoustra, Alfons J.M. Debets, Antonius J.M.M. Rijs, 1 Jianhua Zhang, Eveline Snelders, Peter C. Leendertse, Willem J.G. Melchers, Anton G. Rietveld, Bas J. Zwaan, and Paul E. Verweij
3. Azole-resistant Aspergillus fumigatus in the environment by cburks817 · MapHub
4. Nat Rev Microbiol. 2022; 20(9): 557–571.
Published online 2022 Mar 29. doi: 10.1038/s41579-022-00720-1
Tackling the emerging threat of antifungal resistance to human health
Matthew C. Fisher,1 Ana Alastruey-Izquierdo,2 Judith Berman,3 Tihana Bicanic,4 Elaine M. Bignell,5 Paul Bowyer,6 Michael Bromley,6 Roger Brüggemann,7 Gary Garber,8 Oliver A. Cornely,9 Sarah. J. Gurr,10 Thomas S. Harrison,4,5 Ed Kuijper,11 Johanna Rhodes,1 Donald C. Sheppard,12 Adilia Warris,5 P. Lewis White,13 Jianping Xu,14 Bas Zwaan,15 and Paul E. Verweij11,16
COVID-19 News
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COVID-19 App no longer in use
The NHS COVID-19 app, which alerted close contacts of a positive case and provides the latest health advice about the virus, closed on 27 April 2023.
Over the past year, the success of the vaccination programme, increased access to treatments and high immunity in the population has enabled the government to target its COVID-19 services, meaning the app is no longer needed. The knowledge, technology and lessons learnt from the app will be used to help inform planning and response to future pandemic threats.
It is important that people continue to follow the latest guidance to protect themselves and others:
This includes reporting NHS lateral flow test results on GOV.UK. Those eligible for COVID-19 treatment must report their result so the NHS can contact them about treatment.
COVID-19 vaccination spring programme
The 2023 spring coronavirus (COVID-19) booster programme is now underway. A spring booster dose is being offered to:
- adults aged 75 years and over
- residents in a care home for older adults
- individuals aged 5 years and over who are immunosuppressed
Those eligible can book their vaccination on the National Booking Service or NHS App.
The last date for the public to book spring boosters will be 30 June 2023.
The offer of a first and second dose of the COVID-19 vaccine will also come to an end for many people on 30 June. After this date, the NHS offer will become more targeted to those at increased risk, usually during seasonal campaigns.
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Unblocking Airways: New approaches to preventing mucus plugs
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Excess mucus production is a common problem in people with Allergic Bronchopulmonary Aspergillosis (ABPA), and chronic pulmonary aspergillosis (CPA). Mucus is a thick mixture of water, cellular debris, salt, lipids, and proteins. It lines our airways, trapping and removing foreign particles from the lungs. The gel-like thickness of mucus is caused by a family of proteins called mucins. In individuals with asthma, genetic changes to these mucin proteins can thicken the mucus, making it more difficult to clear from the lungs. This thick and dense mucous builds up and can lead to mucus plugs, blocking the airways and causing breathing difficulties, wheezing, coughing, and other respiratory symptoms.
Doctors usually treat these symptoms with inhalable medications such as bronchodilators and corticosteroids to open the airways and reduce inflammation. Mucolytics can also be used to break down mucus plugs, but the only available medication, N-Acetylcysteine (NAC), is not very effective and can cause unwanted side effects. While current treatments can help manage symptoms, there is a need for effective and safe treatments to directly address the issue of mucus plugs.
To address this issue, 3 approaches are being explored:
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- Mucolytics to dissolve mucus plugs
Researchers at the University of Colorado are testing new mucolytics such as tris (2-carboxyethyl) phosphine. They gave this mucolytic to a group of asthmatic mice experiencing inflammation and excess mucus production. After treatment, mucus flow improved, and the asthmatic mice could clear mucus just as effectively as the non-asthmatic mice.
However, mucolytics work by breaking the bonds which hold mucins together, and these bonds are found in other proteins in the body. If the bonds are broken in these proteins, it could lead to unwanted side effects. Therefore, further research is needed to discover a drug that will only target the bonds in mucins, reducing the risk of side effects.
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2. Clearing crystals
In another approach, Helen Aegerter and her team at the University of Belgium are studying protein crystals which they believe drive mucus overproduction in asthma. These crystals, known as Charcot-Leyden crystals (CLC’s) cause mucus to become thicker, therefore harder to clear from the airways.
To address the crystals directly, the team developed antibodies that attack the proteins in the crystals. They tested the antibodies on mucus samples collected from individuals with asthma. They found that the antibodies effectively dissolved the crystals by attaching themselves to the specific regions of the CLC proteins that hold them together. In addition, the antibodies dampened inflammatory reactions in mice. Based on these findings, the researchers are now working on a drug that could have the same effect in humans. Aegerter believes that this approach could be used to treat a variety of inflammatory diseases that involve excessive mucus production, including sinus inflammation and certain allergic reactions to fungal pathogens (such as ABPA).
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- Preventing excess secretion of mucus
In a third approach, pulmonologist Burton Dickey of the University of Texas is working to prevent mucus plugs by reducing the overproduction of mucus. Dickey's team identified a specific gene, Syt2, that is only involved in excessive mucus production and not in normal mucus production. To inhibit excess mucus production, they developed a drug called PEN-SP9-Cy that blocks Syt2's action. This approach is particularly promising as it targets mucus overproduction without interfering with the vital functions of normal mucus. Normal mucus production plays a critical role in protecting and maintaining the health of the respiratory and digestive systems. Although the initial results are promising, further research is necessary to evaluate the efficacy and safety of these drugs in clinical trials.
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In summary, mucus plugs present uncomfortable symptoms in ABPA, CPA and asthma. Current treatments focus on symptom management rather than directly addressing reduction or removal of mucus plugs. However, researchers are exploring 3 potential approaches, involving mucolytics, clearing crystals, and preventing excess mucus secretion. Additional research is required to confirm their effectiveness and safety, but approaches have shown promising results and may in future be one way we can prevent mucus plugs.
Further information:
Phlegm, mucus and asthma | Asthma + Lung UK
How to loosen and clear mucus
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Fungal vaccine developments
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The numbers of people at risk of fungal infections are increasing due to an aging population, increased use of immunosuppressive medications, pre-existing medical conditions, environmental changes, and lifestyle factors. Therefore, there is a growing need for new treatments or preventative options.
Current treatment options for fungal infections often involve the use of antifungal medications, such as azoles, echinocandins, and polyenes. These medications are generally effective in treating fungal infections, but they can have drawbacks. For example, some antifungal drugs can interact with other medications, leading to potentially harmful side effects. Additionally, overuse of antifungal drugs can contribute to the development of antifungal drug resistance, which can make treatment more challenging.
There has been a growing interest in the development of fungal vaccines as an alternative treatment. A fungal vaccine works by stimulating the immune system to produce a specific response against the fungus, which can provide long-term protection against infection. The vaccine could be given to at-risk individuals before exposure to the fungus, preventing infection from occurring in the first place.
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A recent study by researchers from the University of Georgia demonstrated the potential for a pan-fungal vaccine to protect against multiple fungal pathogens, including those that cause aspergillosis, candidiasis, and pneumocystosis. The vaccine, called NXT-2, was designed to stimulate the immune system to recognize and fight against several types of fungi.
The study found that the vaccine was able to induce a strong immune response in mice and additionally protect them from infection with several different fungal pathogens, including Aspergillus fumigatus, which is the main cause of aspergillosis. The vaccine was found to be safe and well-tolerated in the mice, with no adverse effects reported.
This study demonstrates the potential for a pan-fungal vaccine to protect against multiple fungal pathogens. While the study did not specifically address the use of the vaccine in patients with pre-existing aspergillosis infections, the findings suggest that the vaccine has potential to prevent aspergillosis infection in high-risk individuals.
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In summary, while the development of antifungal vaccines offers a promising potential alternative to the challenges posed by current treatment options for fungal infections, further research is needed to determine the safety and efficacy of the vaccine in humans, including those with aspergillosis, before it can be considered as a treatment option.
Original paper: https://academic.oup.com/pnasnexus/article/1/5/pgac248/6798391?login=false
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Developments in Biologic and Inhaled Antifungal medications for ABPA
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ABPA (Allergic Bronchopulmonary Aspergillosis) is a serious allergic disease caused by a fungal infection of the airways. People with ABPA usually have severe asthma and frequent flare-ups that often require long-term use of oral steroids and antibiotics to treat secondary bacterial infections.
The two main treatments for ABPA are antifungal medication and oral steroids. Antifungal medication work by targeting the fungi causing the infection, limiting its growth and spread. This can help reduce the frequency of flare-ups and stabilize the condition but may also cause side effects such as nausea and, more rarely, liver damage. Oral steroids work by reducing inflammation and suppressing the immune system's response to the allergen, which can help control the symptoms of ABPA. However, long-term use can cause significant side effects, including weight gain, mood swings, and adrenal insufficiency.
These side effects can greatly impact quality of life, but both treatments may be necessary to prevent the disease from worsening. Therefore, new or improved treatments are needed.
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Fortunately, there have been recent developments in managing ABPA, and a review by Richard Moss (2023) highlights two promising types of treatment:
- Inhaled antifungal medication treat fungal lung infections by delivering the drug directly to the site of infection. This allows for a higher concentration of the drug to be delivered to the affected area while limiting the exposure of the rest of the body and therefore reduces side effects. For instance, inhaled itraconazole has been shown to reach concentrations high enough to kill or inhibit fungus growth. Further trials will be completed this year (2023) to assess its safety and effectiveness. Although still in development, these drugs offer hope for more effective and better-tolerated treatment options for patients with ABPA.
- Biologic medication is a completely new type of treatment that uses synthetic antibodies to target specific cells or proteins of our immune system instead of using a chemical compound. Omalizumab, a type of biologic, binds to immunoglobulin IgE and deactivates it. IgE is involved in the allergic response our bodies launch against foreign invaders and plays a big role in ABPA symptoms. Deactivation of IgE has been shown to reduce allergic symptoms. In clinical trials omalizumab has been shown to significantly (a) reduced the number of flare-ups compared to pre-treatment, (b) reduced the need for oral steroid use and lowered its necessary dose, (c) increased wean off steroids, (d) improved lung function and (e) improved asthma control. Additionally, other Monoclonal antibodies (Mabs) such as mepolizumab, benralizumab, and dupilumab have shown a reduction in flare-ups, total IgE and a steroid-sparing effect.
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According to Moss (2023), these new treatment approaches are highly effective in reducing hospital visits. Biologics seem highly effective, with up to a 90% reduction in flare-ups for ABPA patients and up to 98% efficacy in reducing the amount of oral steroid needed by the patient. If these new treatments continue to work well, it could potentially offer a new, higher quality of life for individuals with ABPA . Overall, these findings are promising, but further research is needed to confirm the effectiveness of these treatments specifically for ABPA.
Original paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9861760/
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Spring COVID Booster
COVID-19 levels of infection in the UK are far lower than they have been earlier in the pandemic, even while most people have returned to taking fewer precautions against infection. Increased immunity in the UK population caused by vaccination and infection has likely brought us to this better place.
However levels of immunity are not fixed and much like the common cold it gradually declines in each of us, leaving us open to re-infection within a year. Consequently, we must keep 'topping up' immunity in order to avoid severe symptoms should we be infected. For most of us that are now likely to be a natural process of periodic re-infection until the virus stops circulating so widely.
If you are in a highly vulnerable group it is safest to top-up your immunity without being infected by having a booster vaccination. The Uk government will launch a spring booster campaign shortly to address this need.
Those who will be offered this booster will only be the most at risk, so you may or may not be offered it depending on the opinion of your local hospital doctor or GP. The criteria for the spring booster seem to be more restricted than earlier boosters and will only be offered 6 months after your last booster.
Criteria for the spring campaign are:
- adults aged 75 years and over
- residents in a care home for older adults
- individuals aged 5 years and over who are immunosuppressed (Your doctor will get guidelines to decide this for you)
There will likely be a less restricted booster jab in autumn 2023 too.
Drug Induced Photosensitivity
What is drug-induced photosensitivity?
Photosensitivity is the abnormal or heightened reaction of the skin when exposed to ultraviolet (UV) radiation from the sun. This leads to skin that has been exposed to the sun without protection becoming burnt, and in turn, this can increase the risk of developing skin cancer.
There are several medical conditions like lupus, psoriasis and rosacea that can increase a person's sensitivity to ultraviolet light. A more comprehensive list of known conditions can be found here.
Drug-induced photosensitivity is the most common type of skin-related adverse drug reaction and can occur as a result of topical and oral medications. Reactions happen when a component of the medication combines with UV radiation during sun exposure, causing a phototoxic reaction that appears as severe sunburn, identified by swelling, itchiness, profuse redness and in the worst cases, blistering and oozing.
Patients taking antifungal medications, in particular, Voriconazole and Itraconazole (the former being more widely known for causing reactions), are often aware of the increased risks of photosensitivity; however, these are not the only drugs that can induce an abnormal response to UV exposure. Other drugs that have been reported to cause photosensitivity are:
- NSAIDs (Ibuprofen (oral and topical), naproxen, aspirin)
- Cardiovascular medication (furosemide, ramipril, amlodipine, nifedipine, amiodarone, clopidogrel – just a few)
- Statins (simvastatin)
- Psychotropic drugs (olanzapine, clozapine, fluoxetine, citalopram, sertraline – just a few)
- Antibacterial medications (ciprofloxacin, tetracycline, doxycycline)
It is essential to note that the above list is not exhaustive, and reported reactions range from rare to frequent. If you think a medication other than your antifungal is causing a reaction to the sun, speak to your pharmacist or GP.
How to protect yourself
In most cases, patients can't stop taking the medication that can predispose them to photosensitivity. Staying out of the sun isn't always possible either - quality of life is always an important consideration; therefore, extra care should be taken to protect their skin while outside.
There are two types of protection:
- Chemical
- Physical
Chemical protection is in the form of sunscreen and sunblock. However, it is important to remember that sunscreen and sunblock are not the same. Sunscreen is the most common type of sun protection, and it works by filtering the sun's UV rays, but some still get through. Sunblock reflects the rays away from the skin and prevents them from penetrating it. When buying sunscreen, look for a sun protection factor (SPF) of 30 or above to protect against UVB and at least a UVA protection rating of 4 stars.
Physical protection
- NHS guidance advises staying in the shade when the sun is strongest, which in the UK is between 11am and 3pm from March to October
- Use a sunshade or umbrella
- A wide-brimmed hat that shades the face, neck and ears
- Long-sleeved tops, trousers and skirts made of close-weave fabrics that stop sunlight from penetrating
- Sunglasses with wraparound lenses and wide arms that conform to the British Standard
- UV protective clothing
Links to further information