MAY 18, 2016 12:09 PM PDT

The Microbiome of Skin Stays Stable Over Time

WRITTEN BY: Carmen Leitch
Human skin has a habitat that is conducive to hosting a veritable microcosm of organisms. Fungi, bacteria and viruses are all part of the microbial communities residing on our epidermis; most of them are harmless or actually beneficial to us. A new study is revealing more details about the microbiome of the skin, how it changes and how those changes can impact human health.
Individual differences and the environment shape the structural and functional composition of the human skin microbiome.
Julie Segre of the National Human Genome Research Institute and Heidi Kong of the National Cancer Institute, who are among the authors of the study, have found that fungal, bacterial and viral communities have a strong proclivity for occupying specific skin sites. These communities also function as microbial fingerprints that are distinct and unique to individuals. They further expanded the scope of this work by examining the stability of skin microbial communities over time. Skin samples were taken from twelve healthy individuals on three successive time points, ranging from one month to two years, and they then carried out metagenomic shotgun sequencing on 17 different skin sites.

Interestingly, the microbiomes of skin remained very stable over time, regardless of all the exposure and disruptions to our skin stemming from typical interactions like routine contact with other people, wearing our clothing, and interacting with the environment. Instead of acquiring microbes from the surroundings people reside in, they retained their personal microbial signatures. However, the stability of skin microbiomes did vary across both individuals and microbial strains; some showed more alterations and modifications than others.
17 selected skin sites and their location on the human body. Sites represent four microenvironments: sebaceous (green), dry (blue), moist (red), foot (black). For all sites, boxplots calculate similarity between samples in the time series, aggregated by the skin site characteristic. ‘Long' indicates > 1 year between samplings; ‘Short' averages a month.'Interpersonal' values show the average distance between individuals. Black lines indicate median, boxes show first and third quartiles. Panels are color coded by site characteristic.
Certain parts of the body showed a higher degree of variation in their microbial communities than others did. Oily skin sites like the auditory canal or back had the most stable microbiomes but even dry, highly exposed sites like the palm of the hand, showed incredible stability over time. However, sites with large amounts of diversity in their microbial communities were also the least stable, suggesting factors like personal hygiene or variable environments could play a role in that steadiness.

This study unfortunately only focused on a small number of healthy adults. The scope of the study can be expanded to more individuals and also to include adults with skin disorders like eczema. "Future studies can use the knowledge of the relative stability of the skin microbial communities in healthy adults to understand how various exposures or disease state may alter these skin microbes," Segre says. "For example, studies in acne patients could explore whether specific strains bloom during adolescent acne flares or change with medications such as antibiotics."
 
Source: Cell, AAAS
 
About the Author
  • Experienced research scientist and technical expert with authorships on 28 peer-reviewed publications, traveler to over 60 countries, published photographer and internationally-exhibited painter, volunteer trained in disaster-response, CPR and DV counseling.
You May Also Like
JUL 04, 2018
Microbiology
JUL 04, 2018
Revealing How Gut Bacteria can Impact our Health
Our GI tract pays host to trillions of microbes, which have been shown to play a highly influential role in our health and well-being....
JUL 24, 2018
Microbiology
JUL 24, 2018
Salmonella Outbreak Linked to Raw Turkey Products
Researchers at the CDC are trying to learn more about a rash of Salmonella infections....
SEP 06, 2018
Microbiology
SEP 06, 2018
The Oncomicrobiome - Linking Microbes and Cancer
Scientists want to know more about how the microbes we carry in and on us are related to cancer development....
SEP 17, 2018
Microbiology
SEP 17, 2018
Detecting Dangerous Latent Viruses
Evidence mounts that viruses play a role in disease development....
OCT 08, 2018
Genetics & Genomics
OCT 08, 2018
Neanderthal DNA Helps us Fight Viruses
The last Neanderthals died around 40,000 years ago, but not before breeding with other humans that were starting to move around the globe....
OCT 11, 2018
Cell & Molecular Biology
OCT 11, 2018
Revealing a 'Double Agent' in the Immune System
Researchers want to enhance our natural defenses to fight a variety of health problems more effectively....
Loading Comments...