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Nature's Microbes and Skin Health

Discover how nature's microbes can impact skin conditions like atopic dermatitis.

Johanna Kalmari, Iida Mäkelä, Laura Kummola, Marja Roslund, Heini Huhtala, Riikka Puhakka, Pekka Autio, Heikki Hyöty, Vesa P Hytönen, Aki Sinkkonen, Olli H Laitinen

― 6 min read


Microbes and Eczema Microbes and Eczema health. Nature's microbes may help improve skin
Table of Contents

In recent years, researchers have become increasingly aware of how our environment affects our health. This idea is called the exposome, which includes everything we come into contact with—like the air we breathe, the food we eat, and even the friends we hang out with. It turns out that exposure to a rich variety of Microbes, especially those found in nature, can play a role in keeping our Immune Systems healthy.

Our immune system can sometimes go a bit haywire, leading to conditions like allergies, asthma, and autoimmune diseases. One way to help keep our immune system in check is to have regular contact with nature and its microbiological wonders. Unfortunately, as we spend more time in urban areas, we lose that contact, and our immune systems may not be as happy as they could be.

This article will break down some important findings about how exposure to nature's microbes can impact skin conditions, especially Atopic Dermatitis, commonly known as Eczema.

What is Atopic Dermatitis?

Atopic dermatitis (AD) is a skin condition that causes inflammation, redness, and itching. You could think of it as your skin throwing a tantrum. The condition is quite common, affecting many people around the world. In Europe, for instance, it can affect up to 17.1% of adults, while in Asia, it might be around 1.2%.

People with AD often have dry, cracked skin and may experience flare-ups. These flare-ups can be triggered by several factors, including environmental changes, allergens, and stress. Imagine your skin getting so fed up that it starts throwing a hissy fit!

The Role of Microbes

Microbes, including bacteria, fungi, and even viruses, can be found everywhere in nature. They are essential for a healthy immune system. Studies have suggested that children who have contact with diverse microbial environments are less likely to develop allergies or other immune-related issues later in life.

But as we have become more urbanized and less connected with nature, our exposure to these helpful microbes has decreased. This lack of exposure may lead to an imbalance in our immune system, causing issues like atopic dermatitis and allergies. It’s as if our immune system doesn't know how to behave when it doesn't meet its microbiome friends!

Research Overview

Previous research indicated that exposing healthy individuals to nature-derived microbial materials led to positive immune responses. Given these findings, scientists were curious about whether a similar approach would help people with atopic dermatitis.

In this study, researchers decided to trial a skin lotion made with natural microbial extracts on both healthy participants and those with AD. The aim was to see if it would lead to any improvements in skin health and to investigate whether the treatment was safe.

The Trials

Pretrial with Healthy Participants

The researchers started with a pretrial involving 15 healthy volunteers. Participants were divided into groups and assigned to receive different types of lotions.

  1. The Microbial Lotion: One group received a lotion mixed with live microbes.
  2. The Autoclaved Lotion: Another group got a lotion with heat-killed microbes.
  3. The Placebo: The last group received a lotion designed to look the same but contained no active ingredients.

Over 14 days, participants applied the lotion to their arms twice daily. They were then monitored for any changes in skin condition and immune responses. The results showed that using both the live and autoclaved microbial lotions was safe, with no significant adverse effects reported. Participants tolerated the products well—no skin drama here!

The Trial with Atopic Dermatitis Patients

After successfully testing the lotions on healthy volunteers, the researchers turned their attention to individuals with atopic dermatitis. They included 12 adults with active eczema in the trial. The plan was similar, with each participant using both a placebo lotion and a microbial extract lotion on different arms.

Participants used these lotions twice daily for 28 days while avoiding other skin products. Think of it as a skincare experiment where the volunteers became their own control groups!

At the end of the trial, researchers looked at the skin conditions, checking levels of certain proteins and skin measurements. They aimed to find out if the microbial lotion would improve their eczema compared to the placebo.

Findings

After weeks of applying lotions and filling out questionnaires, the participants shared their experiences. While the lotions felt nice, many said they needed a little more moisture—especially during the cold, dry winter months.

Skin Measurements and Eczema Scoring

The researchers measured transepidermal water loss (TEWL) and redness (erythema) on the participants' skin. They found that overall, less water was escaping from non-inflamed skin than from inflamed sites, which is what you'd expect. However, the microbial lotion didn’t significantly reduce the skin condition compared to the placebo. It's like expecting a superhero but getting a sidekick instead!

Interestingly, the scoring for eczema showed a non-significant decline, hinting that perhaps just using any lotion could lead to improved skin condition—even if it wasn't a miracle microbial fix.

Immune Response

The study also looked at various immune markers in the skin samples. Some of these proteins, like IL-1β and hBD-2, typically increase when inflammation is present. The trial revealed a decrease in these markers over time, suggesting that both the microbial lotion and the placebo helped calm the skin down a bit.

Participants noted some mild side effects like temporary itching or redness upon application, but overall, the treatments were very well tolerated. Even the placebo had some positive effects!

Conclusion

This research suggests that using lotions with natural microbial extracts can be a safe and feasible way to introduce beneficial microbes to the skin, even for people living with atopic dermatitis. A little touch of nature may help maintain skin health without causing harm.

However, the results also remind us that sometimes the best treatments for skin conditions are simply keeping the skin moisturized. As they say, "A happy skin is a well-hydrated skin!"

So, if you find yourself scratching an itch, maybe consider getting a little closer to nature instead of just relying on creams. Your skin may thank you later!

Original Source

Title: Testing the Safety of the Nature Based Microbial Exposure with Atopic Dermatitis Patients -- A Randomized, Placebo Controlled, Double-Blinded Pilot Trial

Abstract: Biodiversity hypothesis posits that it is beneficial for human health to be in contact to microbial biodiversity, and loss of this contact leads to immune-mediated diseases like atopy. Based on this hypothesis, we wanted to study if a lotion containing highly diverse natural microbes is a safe and feasible way to administer nature exposure to humans, and to study the effects of the exposure on the skin. We recruited two groups: 15 people with healthy skin and 12 people with atopic dermatitis. The healthy people were divided to the three groups that used twice daily a lotion containing: 1) 10 % of live microbial extract; 2) 10 % inactivated microbial extract; 3) placebo. The people with atopic dermatitis used a lotion containing 1 % of inactivated microbial extract in one side of their body and a placebo lotion in another side. The daily use of the lotion containing diverse microbial extract was well tolerated by both healthy and atopic people. Microbial extract in lotion did not change the relative abundance of Staphylococcus on healthy skin in 14 day-trial and did not change atopic eczema severity, transepidermal water loss or erythema on atopic skin compared to placebo during 28-day trial. Atopic dermatitis patients can benefit from the overall effect of moisturizing lotion and the microbial extract, which together down-regulated pro-inflammatory IL-1{beta}, IL-22, IL-33 cytokines, and antimicrobial peptide hBD-2 on atopic lesions indicating enhanced tolerance and mitigation of eczema. Nature exposure by microbial extract in lotion could complement current atopic dermatitis treatments.

Authors: Johanna Kalmari, Iida Mäkelä, Laura Kummola, Marja Roslund, Heini Huhtala, Riikka Puhakka, Pekka Autio, Heikki Hyöty, Vesa P Hytönen, Aki Sinkkonen, Olli H Laitinen

Last Update: 2024-12-29 00:00:00

Language: English

Source URL: https://www.medrxiv.org/content/10.1101/2024.12.27.24319404

Source PDF: https://www.medrxiv.org/content/10.1101/2024.12.27.24319404.full.pdf

Licence: https://creativecommons.org/licenses/by/4.0/

Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.

Thank you to medrxiv for use of its open access interoperability.

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