Sample Collecting Methods for Bacterial Community Structure Analysis of Scalp Hair: Non-Invasive Swabbing Versus Intrusive Hair Shaft Cutting

September 2024 in “ Scientific Reports ”

Kota Watanabe, Azusa Yamada, Hao Masuda, Eri Kashiwazaki, Shunichi Nakayama, Toshimori Kadokura, Kenji Sakai, Yukihiro Tashiro

bacterial community structure scalp hair non-invasive swabbing hair shaft cutting alpha diversity principal coordinate analysis

Studysummary This study observed that bacterial communities on scalp hair collected through non-invasive swabbing showed similar diversity and composition to those obtained by cutting or removing hair, suggesting that swabbing is an effective method for microbiome analysis on hair.

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research Scalp Bacterial Species Influence SIRT1 And TERT Expression In Keratinocytes

4 citations , September 2023 in “Bioscience Biotechnology and Biochemistry”

In this study, predominant scalp bacteria, such as Cutibacterium acnes and Pseudomonas lini, were found to influence the expression of genes related to scalp and hair health in keratinocytes, potentially affecting scalp repair and hair growth.

research Distribution of Bacterial Community Structures on Human Scalp Hair Shaft in Relation to Scalp Sites

September 2023 in “Bioscience, biotechnology, and biochemistry”

In this study, researchers observed that bacterial community structures on human scalp hair are unique to individuals and show consistent patterns across different sampling sites on the scalp, without significant variation between these sites.

research Laser Capture Microdissection as a Method for Investigating the Human Hair Follicle Microbiome Reveals Region-Specific Differences in the Bacteriome Profile

8 citations , March 2023 in “BMC Research Notes”

This pilot study explored a new method using laser-capture microdissection and 16S rRNA gene sequencing to analyze the human scalp hair follicle microbiome more accurately, revealing region-specific variations in microbial diversity and abundance.

A Potential Predictive Role of the Scalp Microbiome Profiling in Patients with Alopecia Areata: Staphylococcus Caprae, Corynebacterium, and Cutibacterium Species

research A Potential Predictive Role of the Scalp Microbiome Profiling in Patients with Alopecia Areata: Staphylococcus Caprae, Corynebacterium, and Cutibacterium Species

3 citations , April 2022 in “Microorganisms”

This study found that the scalp microbiome was more diverse in alopecia areata patients than in healthy controls, and distinctive microbial profiles may be linked to disease severity and prognosis.

research Relationship Between the Bacterial Community Structures on Human Hair and Scalp

7 citations , September 2020 in “Bioscience Biotechnology and Biochemistry”

This study found that bacterial community structures on hair and scalp differ significantly, with distinct abundances of Pseudomonas on hair and Staphylococcus on scalp.

research Microbiome in the Hair Follicle of Androgenetic Alopecia Patients

26 citations , May 2019 in “PLOS ONE”

This study observed that hair follicles in hair loss patients had increased levels of Propionibacterium acnes, potentially linked to elevated immune response gene expression in miniaturized hair follicles.

research Scalp Bacterial Shift in Alopecia Areata

48 citations , April 2019 in “PloS one”

This study observed a microbial shift on the scalp of Alopecia areata patients, characterized by an increase in Propionibacterium acnes and a decrease in Staphylococcus epidermidis, compared to healthy controls.

research Comparison of Healthy and Dandruff Scalp Microbiome Reveals the Role of Commensals in Scalp Health

65 citations , October 2018 in “Frontiers in cellular and infection microbiology”

This study observed that dandruff in Indian women is associated with a distinct scalp microbiome, including specific bacterial and unknown Malassezia species, with implications for nutrient homeostasis and cell-host adhesion pathways.

research Bacteria Display Differential Growth and Adhesion Characteristics on Human Hair Shafts

33 citations , September 2018 in “Frontiers in Microbiology”

This study demonstrated that human hair shafts can inhibit the growth of Gram-positive bacteria but have no effect on Gram-negative bacterial growth, offering insights into hair and scalp health.

research Studies on the Proteome of Human Hair: Identification of Histones and Deamidated Keratins

54 citations , January 2018 in “Scientific reports”

This study used proteomics to identify various proteins in human hair, which may help develop novel biomarkers for hair health, disease, and aging.

research A Review of the Use of Biotin for Hair Loss

78 citations , January 2017 in “Skin appendage disorders”

This review discusses the use of biotin for hair and nail growth, noting clinical improvement in cases with existing pathologies, but concludes there is insufficient evidence supporting its benefits for healthy individuals.

research A Review: Hair Health, Concerns of Shampoo Ingredients and Scalp Nourishing Treatments

27 citations , September 2015 in “Current Pharmaceutical Biotechnology”

This review discusses the main issues affecting hair health, assesses the safety of certain shampoo ingredients, and highlights areas for future research; it reports no clinical results.