105 citations
,
December 1998 in “Archives of Dermatological Research” This study found that dermal papilla cells in human hair follicles exhibit stronger expression of VEGF mRNA and protein compared to other follicular cells, suggesting their key role in angiogenic processes related to hair growth.
147 citations
,
April 1997 in “Oncogene” This study found that transgenic mice expressing IGF-1 in their skin showed significant skin changes, early hair follicle generation, and a higher propensity to develop tumors after chemical promotion, suggesting IGF-1's role in skin carcinogenesis.
150 citations
,
April 1997 in “Journal of Investigative Dermatology” 
100 citations
,
November 1996 in “Molecular Medicine Today” This review discusses the role of growth factors and cytokines in hair follicle development and cycling, but reports no new clinical findings on treatments for hair growth disorders.
135 citations
,
January 1996 in “Journal of Investigative Dermatology” 219 citations
,
July 1995 in “PubMed” This study found that recombinant keratinocyte growth factor (rKGF) stimulated hair growth and provided a protective effect against alopecia in murine models, suggesting its role in hair follicle development and regeneration.
133 citations
,
July 1994 in “Journal of Dermatological Science” In this study, the researchers developed an in vitro model that maintains human hair follicles to grow at in vivo rates and observed that factors like EGF and IGF-I influence hair follicle growth and catagen entry.
30 citations
,
August 1993 in “PubMed” This study found that IL-1 alpha inhibits the growth of cultured human hair follicles and hair fibers, suggesting a potential role in inflammatory hair loss conditions like alopecia areata.
58 citations
,
April 1993 in “Developmental Biology” This study found that subcutaneous injections of basic fibroblast growth factor in neonatal mice delayed the development and hair growth cycles of hair follicles compared to controls.
150 citations
,
August 1992 in “Genes & Development” This study reported that transgenic mice with targeted TNF alpha expression in keratinocytes showed impaired weight gain, retarded hair growth, and skin changes, leading to cachexia and necrosis.
72 citations
,
January 1983 in “The Anatomical Record” This study found that epidermal growth factor treatment in male mice delayed normal skin development, inhibiting hair growth and follicle development by maintaining birth-level cell proliferation and differentiation for several days.
