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Glossary Prostaglandin D2

lipid compound linked to hair loss and inflammation

Prostaglandin D2 (PGD2) is a type of prostaglandin, which are lipid compounds that have hormone-like effects in the body. PGD2 is involved in various physiological processes, including the regulation of inflammation and allergic responses. Notably, it has been linked to hair growth regulation, where elevated levels of PGD2 in the scalp have been associated with hair loss conditions such as androgenetic alopecia.

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Research

5 / 1000+ results

Biochemical and Structural Characteristics, Gene Regulation, Physiological, Pathological and Clinical Features of Lipocalin-Type Prostaglandin D2 Synthase as a Multifunctional Lipocalin

research Biochemical and Structural Characteristics, Gene Regulation, Physiological, Pathological and Clinical Features of Lipocalin-Type Prostaglandin D2 Synthase as a Multifunctional Lipocalin

18 citations , October 2021 in “Frontiers in Physiology”

This review summarizes recent research on the molecular properties and functions of L-PGDS and PGD2, but reports no new findings, highlighting their pathophysiological roles and guiding future studies.

Prostaglandin D2 Inhibits Hair Growth and Is Elevated in Bald Scalp of Men with Androgenetic Alopecia

research Prostaglandin D ₂ Inhibits Hair Growth and Is Elevated in Bald Scalp of Men with Androgenetic Alopecia

205 citations , March 2012 in “Science Translational Medicine”

PGD2 stops hair growth and is higher in bald men with AGA.

research Prostaglandin D2 Inhibits Wound-Induced Hair Follicle Neogenesis through the Receptor, Gpr44

68 citations , November 2012 in “Journal of Investigative Dermatology”

This study found that PGD2 inhibits hair follicle regeneration in mice through the Gpr44 receptor, suggesting that blocking PGD2 or Gpr44 may enhance skin regeneration after wounds.

research In silico prediction of prostaglandin D2 synthase inhibitors from herbal constituents for the treatment of hair loss

30 citations , October 2015 in “Journal of Ethnopharmacology”

This study identified several compounds from traditional Chinese medicines that may inhibit prostaglandin D2 synthase, potentially providing promising candidates for treating androgenic alopecia with minimal adverse skin reactions.

Divergent Proliferation Patterns of Distinct Human Hair Follicle Epithelial Progenitor Niches In Situ and Their Differential Responsiveness to Prostaglandin D2

research Divergent proliferation patterns of distinct human hair follicle epithelial progenitor niches in situ and their differential responsiveness to prostaglandin D2

21 citations , November 2017 in “Scientific Reports”

This study found that prostaglandin D2 reduced proliferation in bulge resident K15+ stem cells but not in other K15+ progenitor cells, suggesting differential impacts on hair follicle stem cell niches.

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Community Join

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community Need supplemental products in addition to oral minoxidil and oral dutasteride

1 upvotes 1 year ago

The user has been using oral minoxidil and dutasteride for hair loss without success and is considering adding topical 17α-estradiol, Pyrilutamide, Clascoterone, or cetirizine. They have confirmed low serum DHT levels and are exploring additional treatments due to genetic sensitivity to DHT and prostaglandin D2.

community You will lose hair if your prostaglandins aren't in balance

56 upvotes 1 year ago

Prostaglandin balance affects hair loss, particularly in conditions like Lichen Planopilaris, where an imbalance can lead to hair follicle damage. Treatments mentioned include prostaglandin analogs and Pioglitazone HCL, with a focus on maintaining prostaglandin equilibrium for potential hair regrowth.

community Doubts about castor oil

5 upvotes 7 years ago

Castor oil's effectiveness for hair growth is debated, with concerns about its impact on skin health and prostaglandin levels. Some users suggest combining it with coconut oil and using it alongside finasteride for better results, while others recommend sticking to proven synthetic treatments.

community Stumbled on some research

8 upvotes 5 years ago

Elevated PGD2 levels in bald scalp tissue may contribute to hair loss, and treatments like castor oil, finasteride, and minoxidil are discussed as potential solutions. Some users explore alternatives like oral castor oil and cetirizine for those who cannot use finasteride.

community Hey med experts explain this please??

7 upvotes 1 year ago

Finasteride, dutasteride, saw palmetto, caffeine, spironolactone, acetyltetrapeptides, tea tree oil, hydrocortisone, zinc pyrithione, latanoprost, melatonin, marine protein supplements, PRP, microneedling, and valproate are discussed as treatments for hair loss. DHT reduction and inflammation control are key strategies.

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Learn

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learn Setipiprant

What is Setipiprant and how does it differ from DHT blockers like finasteride or dutasteride? Setipiprant blocks the prostaglandin D2 receptor DP2 rather than the DHT pathway that finasteride and dutasteride act on. The one published human trial — a 169-man, 24-week phase 2a study at 2,000 mg a day — reported no statistically significant improvement in hair density over placebo, and setipiprant is not an approved hair-loss medicine anywhere.
How does Setipiprant work on the scalp to potentially promote hair regrowth? Setipiprant blocks the DP2 (CRTH2) receptor that prostaglandin D₂ acts through, and PGD₂ is reported to be elevated in balding scalp — but the one published placebo-controlled trial in men (DuBois 2021, n=169) found no significant hair regrowth. It is an experimental compound, not an approved hair-loss medicine.

learn Cetirizine

popular antihistamine showing promise for hair loss as an anti-inflammatory and prostaglandin inhibitor

How does cetirizine reduce inflammation linked to hair loss? Cetirizine is proposed to lower prostaglandin D2 and raise prostaglandin E2 around hair follicles; three small trials of a compounded 1% topical report modest increases in hair density and shaft thickness, with minoxidil doing better head-to-head. Topical cetirizine is off-label and unapproved for hair loss, and the evidence is too thin to call it effective or safe.

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