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Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging.
J Invest Dermatol. 2021 04; 141(4S):1041-1051.JI

Abstract

In women, aging leads to reduced hair density and thinner fibers and can result in female-pattern hair loss. However, the impact of the aging dermal environment on female scalp hair follicles remains unclear. In this study, we document in situ changes in 22 women (aged 19-81 years) and primary cultures of dermal fibroblast and dermal sheath cells. In situ, the papillary reticular boundary was indistinguishable in the young scalp but prominent in the scalp of those aged >40 years, accompanied by reduced podoplanin (PDPN) expression, increased versican expression, and changes in collagen organization. Hair follicles were shorter, not reaching the adipose layer. Hyaluronic acid synthase 2 was highly expressed, whereas matrix metalloproteinase 1 was elevated in the dermal papilla and dermal sheath in situ. Primary dermal fibroblast cultures confirmed that matrix metalloproteinase 1 mRNA, MMP1, increased with aging, whereas in dermal sheath cells, hyaluronic acid synthase 2, HAS2, and PDPN increased and α-smooth muscle actin αSMA mRNA decreased. Both exhibited increased cartilage oligomeric protein, COMP mRNA expression. Proteomics revealed an increase in dermal sheath proteins in the dermal fibroblast secretome with aging. In summary, aging female scalp shows striking structural and biological changes in the hair follicle environment that may impact hair growth.

Authors+Show Affiliations

The Centre for Skin Sciences, Faculty of Life Sciences, The University of Bradford, Bradford, United Kingdom.The Centre for Skin Sciences, Faculty of Life Sciences, The University of Bradford, Bradford, United Kingdom.R&D, Hair Innovation & Technology, Aveda, Minneapolis, Minnesota, USA; R&D, The Estée Lauder Companies, Melville, New York, USA.The Centre for Skin Sciences, Faculty of Life Sciences, The University of Bradford, Bradford, United Kingdom.The Centre for Skin Sciences, Faculty of Life Sciences, The University of Bradford, Bradford, United Kingdom. Electronic address: M.J.Thornton@bradford.ac.uk.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

33326808

Citation

Williams, Rachael, et al. "Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging." The Journal of Investigative Dermatology, vol. 141, no. 4S, 2021, pp. 1041-1051.
Williams R, Westgate GE, Pawlus AD, et al. Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging. J Invest Dermatol. 2021;141(4S):1041-1051.
Williams, R., Westgate, G. E., Pawlus, A. D., Sikkink, S. K., & Thornton, M. J. (2021). Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging. The Journal of Investigative Dermatology, 141(4S), 1041-1051. https://doi.org/10.1016/j.jid.2020.11.009
Williams R, et al. Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging. J Invest Dermatol. 2021;141(4S):1041-1051. PubMed PMID: 33326808.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Age-Related Changes in Female Scalp Dermal Sheath and Dermal Fibroblasts: How the Hair Follicle Environment Impacts Hair Aging. AU - Williams,Rachael, AU - Westgate,Gillian E, AU - Pawlus,Alison D, AU - Sikkink,Stephen K, AU - Thornton,M Julie, Y1 - 2020/12/14/ PY - 2020/08/04/received PY - 2020/11/18/revised PY - 2020/11/19/accepted PY - 2020/12/17/pubmed PY - 2021/10/28/medline PY - 2020/12/16/entrez SP - 1041 EP - 1051 JF - The Journal of investigative dermatology JO - J Invest Dermatol VL - 141 IS - 4S N2 - In women, aging leads to reduced hair density and thinner fibers and can result in female-pattern hair loss. However, the impact of the aging dermal environment on female scalp hair follicles remains unclear. In this study, we document in situ changes in 22 women (aged 19-81 years) and primary cultures of dermal fibroblast and dermal sheath cells. In situ, the papillary reticular boundary was indistinguishable in the young scalp but prominent in the scalp of those aged >40 years, accompanied by reduced podoplanin (PDPN) expression, increased versican expression, and changes in collagen organization. Hair follicles were shorter, not reaching the adipose layer. Hyaluronic acid synthase 2 was highly expressed, whereas matrix metalloproteinase 1 was elevated in the dermal papilla and dermal sheath in situ. Primary dermal fibroblast cultures confirmed that matrix metalloproteinase 1 mRNA, MMP1, increased with aging, whereas in dermal sheath cells, hyaluronic acid synthase 2, HAS2, and PDPN increased and α-smooth muscle actin αSMA mRNA decreased. Both exhibited increased cartilage oligomeric protein, COMP mRNA expression. Proteomics revealed an increase in dermal sheath proteins in the dermal fibroblast secretome with aging. In summary, aging female scalp shows striking structural and biological changes in the hair follicle environment that may impact hair growth. SN - 1523-1747 UR - https://www.unboundmedicine.com/medline/citation/33326808/Age_Related_Changes_in_Female_Scalp_Dermal_Sheath_and_Dermal_Fibroblasts:_How_the_Hair_Follicle_Environment_Impacts_Hair_Aging_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-202X(20)32349-6 DB - PRIME DP - Unbound Medicine ER -