References: Hair growth and hair loss
J Med Primatol. 1991 Oct;20(8):394-401.
Pachyonychia congenita-like disorder in cotton-top tamarins (Saguinus oedipus oedipus).
Brack M, Klensang H.
Deutsches Primatenzentrum GmbH, Gottingen, Germany.
A spontaneous genodermatosis in 13 cotton-top tamarins is described as a retrospective study. The disease appeared as alopecia, pigmentary disturbances, and claw dystrophy similar but not identical to human Pachyonychia congenita. The disease in the tamarins seems to be inherited as an autosomal recessive trait, becoming clinically apparent around adolescence. In certain families the neonatal mortality rate was also above average, reaching 100%.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1803010&dopt=Abstract
J Dermatol. 1991 Dec;18(12):714-9.
Hair growth on nude mice due to cyclosporin A.
Watanabe S, Mochizuki A, Wagatsuma K, Kobayashi M, Kawa Y, Takahashi H.
Department of Dermatology, Teikyo University School of Medicine, Tokyo, Japan.
One of the most common dermatological side effects of cyclosporin A (CsA) is dose-dependent hypertrichosis. Similar hair growth was noted in nude mice in an attempt to increase the acceptance of human xenografts with CsA in the T-cell-deficient congenitally athymic nude (nu/nu) mice. The aim of the present study was to further investigate the stimulation of hair growth on nude mice not only by oral administration of CsA but also by topical and subcutaneous administration of CsA. Young BALB/c female nude mice were treated for 3 or 4 weeks with topical, oral, or subcutaneous applications of CsA dissolved in olive oil at various doses. The hair of CsA-treated mice appeared to grow from 7 days after the treatment, even at low doses. Induced hair growth was dose-dependent and became clearly obvious 3 weeks after the treatment. The stimulation of hair growth was not restricted to the site of topical application. The distribution of the new hair depended on the natural pattern of hair growth in the mice. However, there was no hair growth in the control mice which were given only olive oil. Histological examination revealed that there were no differences in the structures of skin and hair between the control and the CsA-treated mice. Furthermore, the number of hair follicles did not remarkably increase after CsA treatment. The hair growth in the CsA-treated mice stopped after cessation of the treatment and returned to the level of the control mice on day 14 after the end of the treatment. Subsequent retreatment with CsA resulted in further regrowth of the hair.(ABSTRACT TRUNCATED AT 250 WORDS)
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Antimicrob Agents Chemother. 1991 Dec;35(12):2544-50.
Pharmacokinetics, toxicity, and activity of intravenous dextran sulfate in human immunodeficiency virus infection.
Flexner C, Barditch-Crovo PA, Kornhauser DM, Farzadegan H, Nerhood LJ, Chaisson RE, Bell KM, Lorentsen KJ, Hendrix CW, Petty BG, et al.
Division of Clinical Pharmacology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
Polysulfated polysaccharides are attractive candidates for antiviral drug development because of their potent in vitro activities against human immunodeficiency virus (HIV), herpesviruses, and other enveloped viruses. To determine the potential anti-HIV activity of a prototypical polysulfated polysaccharide, we administered the maximally tolerated dose of dextran sulfate by continuous intravenous infusion to 10 subjects with symptomatic HIV infection for up to 14 days. Since parenteral dextran sulfate is an anticoagulant, the infusion was adjusted to produce the greatest acceptable increase in activated partial thromboplastin time. Drug concentrations in plasma achieved with this protocol were up to 200-fold greater than the 50% inhibitory concentration for free HIV infectivity in vitro. Despite this, circulating HIV antigen (p24) levels increased in all eight subjects who received the drug for more than 3 days (median proportional increase, 73.5%; range, 32 to 130%); this increase was highly significant when it was compared with that in a large cohort of untreated historical controls (Fisher's exact test, P less than 0.001). Frequent decreases in infusion rate were required in all subjects to maintain a constant activated partial thromboplastin time; plasma dextran sulfate levels did not fall as the infusion rate decreased, suggesting a decline in estimated drug clearance over time. Continuous intravenous dextran sulfate was toxic, producing profound but reversible thrombocytopenia in all eight subjects who received drug for more than 3 days and extensive but reversible alopecia in five of these subjects. Because of its toxicity and lack of beneficial effect on surrogate markers, dextran sulfate is unlikely to have a practical role in the treatment of symptomatic HIV infection.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1810188&dopt=Abstract
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