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Glossary Gap Junctions

Gap junctions are specialized intercellular connections that allow for direct communication between adjacent cells through the exchange of ions and small molecules. In the context of hair biology, they play a crucial role in maintaining the homeostasis of hair follicle cells and facilitating the signaling necessary for hair growth and cycling. Key distinguishing characteristics of gap junctions include their formation by connexin proteins, which assemble to create channels that bridge the cytoplasmic space between cells, enabling coordinated cellular responses that are vital for healthy hair follicle function. Disruption of gap junction communication can contribute to hair loss and other hair disorders.

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research Epidermal Stem Cells do not Communicate Through Gap Junctions

73 citations , January 2002 in “Journal of Investigative Dermatology”

In this study, researchers found that connexin 43-negative cells in the basal layer of the epidermis could serve as markers for keratinocyte stem cells, aiding their identification and separation.

research Gap junctions in Turing-type periodic feather pattern formation

8 citations , May 2024 in “PLoS Biology”

This study on feather pattern formation in chicken skin found that inhibiting gap junctional intercellular communication can lead to the emergence of new feather buds in specific spatial patterns, suggesting that GJIC may facilitate Turing-type periodic patterning by propagating inhibitory signals over long distances.

research Gap junctions in Turing-type periodic feather pattern formation

April 2023 in “bioRxiv (Cold Spring Harbor Laboratory)”

This study found that gap junctional communication influences feather patterning by modulating Turing-type activator-inhibitor systems in chicken skin, suggesting its role in propagating inhibitory signals crucial for pattern formation.

research Use of primary keratinocyte cultures from plucked human hairs for analysis of gap junctional intercellular communication

3 citations , January 1991 in “Toxicology in Vitro”

This study reports that hair follicle cultures are effective for gap junctional intercellular communication studies and can be used to assess the tumor-promoting activity of certain environmental chemicals.

research Defective Expression of the Gap Junction Protein Pannexin-1 Channel Contributes to the Formation of PCOS-Realted Androgenetic Alopecia

January 2023 in “Advances in reproductive sciences”

This study found that women with PCOS and female androgenetic alopecia had significantly higher serum pannexin-1 channel levels compared to those without PCOS, suggesting a potential role in hair loss etiology.

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community Good news for indians for buying min/ dut

34 upvotes 1 week ago

Davaindia offers affordable oral minoxidil and dutasteride, manufactured by Windlas Biotech, providing similar efficacy to higher-priced brands like Dr. Reddy's and Cipla. Some users report dissatisfaction with Davaindia's products, preferring brands like Lonitab and Dr. Reddy's for better results.

community Min/Fin/Needle July 2024-March 2026

30 upvotes 6 months ago

The user experienced hair regrowth and improved hair density using oral finasteride and topical minoxidil, with microneedling as an additional treatment. They are considering a hair transplant for low-density areas but are uncertain due to existing follicles.

community Conversations about hair-loss with normies: They're always funny.

11 upvotes 5 years ago

Hair loss is often misunderstood by those not affected, leading to frustration for those who research treatments like Minoxidil, finasteride, and hair transplants. Many people offer well-meaning but uninformed advice, while those knowledgeable about hair loss focus on proven treatments.

community Peptides that Stop Hair Loss? | In-depth Literature Review Video

76 upvotes 2 years ago

Peptides like TB500, KPV, GHK-CU, and BPC-157 are overhyped for hair growth with limited proven effectiveness in humans. Combining peptides with delivery methods like iontophoresis and sonophoresis shows promise, but many claims remain unproven.

community We already know how to permanently fix hair loss. The science is done. The only thing missing is the funding to run one experiment.

in Technology 613 upvotes 4 months ago

A permanent hair loss solution could involve reprogramming hair follicles to resist DHT using mRNA and siRNA. However, high costs, safety concerns, and the pharmaceutical industry's preference for ongoing treatments over one-time cures are major obstacles, with finasteride and minoxidil remaining standard treatments.

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