Perifollicular Fibrosis: Pathogenetic Role in Androgenetic Alopecia

June 2006 in “ Biological & Pharmaceutical Bulletin ”

Hyeon Gyun Yoo, Jin-Soo Kim, Se Rah Lee, Hyun-Mi Pyo, Hyung-In Moon, Jonghee Lee, Oh Joon Kwon, Jin Wook Chung, Se Kyu Kim, Hee Chul Eun, Kwang-Hyun Cho

perifollicular fibrosis androgenetic alopecia androgen hormones collagen follicular dermal papilla cells finasteride AGA Propecia

TLDR Androgen hormones cause hair follicle scarring in hair loss, and finasteride helps reduce it.

This study investigated the role of perifollicular fibrosis in androgenetic alopecia (AGA). The researchers found that androgen hormones stimulate the production of collagen from follicular dermal papilla cells, leading to perifollicular fibrosis in AGA. Finasteride was found to reduce this fibrosis. The study suggests that perifollicular fibrosis may play a pathogenetic role in AGA, and that finasteride may inhibit this process.

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Research cited in this study

10 / 10 results

research Pathogenesis of Androgenetic Alopecia

52 citations, April 2004 in “Journal of The American Academy of Dermatology”

Male pattern baldness involves three mechanisms and finasteride can help reverse it.

Androgen-Inducible TGF-β1 from Balding Dermal Papilla Cells Inhibits Epithelial Cell Growth: A Clue to Understanding Paradoxical Effects of Androgen on Human Hair Growth

research Androgen-Inducible TGF-β1 from Balding Dermal Papilla Cells Inhibits Epithelial Cell Growth: A Clue to Understanding Paradoxical Effects of Androgen on Human Hair Growth

190 citations, October 2002 in “The FASEB journal”

Androgens may cause hair loss by increasing TGF-beta1 from scalp cells, which inhibits hair cell growth.

research In Vitro Main Pathways of Steroid Action in Cultured Hair Follicle Cells: Vascular Approach

30 citations, December 1999 in “Journal of Investigative Dermatology Symposium Proceedings”

Steroids, particularly estrogens and 5α-reductase inhibitors, affect blood vessel-related hair growth processes in hair follicle cells.

research Roles of Testosterone in the Growth of Keratinocytes Through Bald Frontal Dermal Papilla Cells

21 citations, January 1999 in “Endocrine”

research Androgen-Dependent Beard Dermal Papilla Cells Secrete Autocrine Growth Factors in Response to Testosterone Unlike Scalp Cells

51 citations, November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology”

Beard cells, unlike scalp cells, produce growth factors in response to testosterone, which may explain differences in hair growth.

research Balding Hair Follicle Dermal Papilla Cells Contain Higher Levels of Androgen Receptors Than Those From Non-Balding Scalp

227 citations, January 1998 in “Journal of Endocrinology”

Cells from balding scalps have more androgen receptors than cells from non-balding scalps.

research Androgen Metabolism as It Affects Hair Growth in Androgenetic Alopecia

143 citations, October 1996 in “Dermatologic Clinics”

Too much androgen can cause hair loss; finasteride may help.

research Androgenetic Alopecia: An Autosomal Dominant Disorder

80 citations, January 1995 in “The American Journal of Medicine”

Hair loss in androgenetic alopecia is caused by genetic factors and androgen excess, and can be treated with combined therapies.

research Diagnostic and Predictive Value of Horizontal Sections of Scalp Biopsy Specimens in Male Pattern Androgenetic Alopecia

309 citations, May 1993 in “Journal of The American Academy of Dermatology”

Horizontal scalp biopsy sections effectively diagnose and predict MPAA, with follicular density and inflammation impacting hair regrowth.

research Male Pattern Alopecia: A Histopathologic and Histochemical Study

94 citations, August 1975 in “Journal of Cutaneous Pathology”

Male pattern baldness involves smaller hair follicles, larger oil glands, and other tissue changes, but not major blood supply issues.

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