December 2021 in “Benha Journal of Applied Sciences” This study found that plasma Claudin 3 levels were linked to alopecia areata severity among patients compared to healthy controls.
April 2018 in “Journal of Investigative Dermatology” This study found that claudins CLDN1 and CLDN3 are crucial for maintaining proper hair follicle structure in mice, and their dysregulation may lead to telogen hair loss.
3 citations
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March 2023 in “Annals of the New York Academy of Sciences” In this study using mice, simultaneous deficiencies in claudin-1 and claudin-3 were associated with hair loss and altered hair follicle architecture during the telogen phase, suggesting a role in hair retention.
10 citations
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December 2019 in “in Vivo” This study found that administering testosterone to ovariectomized female rats decreased endometrial tight junction complexity and expression of specific proteins, potentially affecting embryo implantation.
39 citations
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August 2018 in “Scientific reports” This study demonstrated that tight junction barriers exist in human hair follicles but are less tight in hair follicle keratinocytes than in interfollicular keratinocytes, highlighting claudin-1's key role in follicle barrier function and growth.