Hair loss during treatment with oral contraceptives

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Contracept Fertil Sex (Paris) 1985 Dec;13(12):1265-8

Hair loss during treatment with oral contraceptives

Oral contraceptives with a dominant androgen component can cause or worsen androgen-dependent alopecia in women. This diagnosis can only be made if other causes of alopecia (which can occur at the same time as treatment with oral contraceptives) have been excluded. The patient's endocrine profile must be investigated sometimes, this being in order to detect any excess production of androgens. These types of alopecia call for the stopping of the oral contraceptive and sometimes also calls for oral anti-antigen treatment.

Clin Exp Dermatol 2002 Jul;27(5):373-82

Male androgenetic alopecia.

Androgenetic alopecia (AGA) is the most common type of hair loss in men. The relative strong concordance of the degree of baldness in fathers and sons is not consistent with a smiple Mendelian trait and a polygenic basis is considered to be most likely. So far the predisposing genes for AGA are unknown and we do not understand the molecular steps involved in androgen-dependent beard growth versus androgen-dependent hair loss, but AGA can be defined as a DHT-dependent process with continuous miniaturization of sensitive hair follicles. The type 2 5aR plays a central role by the intrafollicular conversion of T to DHT. Due to the inceasing knowledge in this field, this article shall privide an critical overwiew of recent discoveries.

J Am Acad Dermatol 2001 Sep;45(3 Suppl):S81-6

Possible mechanisms of miniaturization during androgenetic alopecia or pattern hair loss.

In androgenetic alopecia, or pattern hair loss, follicles undergo miniaturization, shrinking from terminal to vellus-like hairs. Traditionally, this process is thought to progress gradually over a number of follicular cycles. However, it is unlikely that miniaturization can be explained only by a series of progressively shorter anagen cycles. Simple calculations show that this process would take too long for significant miniaturization to occur secondary to shorter anagen cycles alone, especially in view of the latent lag period seen in pattern hair loss that occurs between the loss of a telogen hair and the appearance of an anagen hair. Evidence is presented to support a new concept that miniaturization is an abrupt, large-step process that also can be reversed in 1 hair cycle, as has been shown clinically, with confirmatory histologic evidence, in patients with pattern hair loss responding to finasteride treatment. It is hypothesized that the miniaturization seen with pattern hair loss may be the direct result of reduction in the cell number and, hence, size of the dermal papilla.

Cancer Res. 2003 Jun 15;63(12):3037-42.

Inhibition of the Development of Metastatic Squamous Cell Carcinoma in Protein Kinase C epsilon Transgenic Mice by alpha-Difluoromethylornithine Accompanied by Marked Hair Follicle Degeneration and Hair Loss.

The role of 12-O-tetradecanoylphorbol-13-acetate (TPA)-stimulated polyamine biosynthesis in the development of metastatic squamous cell carcinoma (mSCC) in protein kinase C epsilon (PKCepsilon) transgenic mice was determined. TPA treatment induced epidermal ornithine decarboxylase (ODC) activity and putrescine levels approximately 3-4-fold more in PKCepsilon transgenic mice than their wild-type littermates. Development of mSCC by the 7,12-dimethylbenz(a)anthracene (100 nmol)-TPA (5 nmol) protocol in PKCepsilon transgenic mice was completely prevented by administration of the suicide inhibitor of ODC alpha-difluoromethylornithine (DFMO, 0.5% w/v) in the drinking water during TPA promotion. However, DFMO treatment led to marked hair loss in PKCepsilon transgenic mice. DFMO treatment-associated hair loss in PKCepsilon transgenic mice was accompanied by a decrease in the number of intact hair follicles. These results indicate that TPA-induced ODC activity and the resultant accumulation of putrescine in PKCepsilon transgenic mice are linked to growth and maintenance of hair follicles, and the development of mSCC. Severe hair loss observed in PKCepsilon transgenic mice on DFMO during skin tumor promotion has not been reported before in the prevention of cancer in other animal models or in human cancer prevention trials.

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DHEA has been suggested to provide numerous potential benefits. DHEA (or dehydroepiandrosterone) is converted into androgens (male hormones) or estrogens (female hormones) in the cells.

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