References: Hair growth and hair loss
Tierarztl Prax. 1992 Feb;20(1):49-54.
[Selenium poisoning in fattening swine]
[Article in German]
Wendt M, Jacobs M, Muhlum A, Matschullat G, Vogel R.
Klinik fur kleine Klauentiere, Tierarztlichen Hochschule Hannover.
A case of selenium toxicosis was observed in fattening pigs. Intoxication was caused by high levels of selenium in a commercial mineral premix. Instead of the recommended dose of 16 ppm Se, the mineral feed contained selenium at concentrations of 657 and 1059 ppm. The ration in use was found to contain more than 14 ppm selenium. Clinical symptoms were observed 5 to 6 weeks after the pigs began consuming the contaminated feed mixture. Feed intake was markedly reduced and animals showed severe lameness due to separation and necrosis of the hoof wall at the coronary band. Some pigs were reluctant to stand. In some cases alopecia was detected. At histopathological examination one animal with paralysis of the hind limbs revealed a focal bilaterally symmetric poliomyelomalacia in the lumbar segment of the spinal cord. Diagnosis was confirmed by high selenium contents of liver, kidneys and blood. After removing the incriminated feed no further pigs developed signs of intoxication. New horn growth was present and lame animals recovered slowly.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1509479&dopt=Abstract
Am J Vet Res. 1980 Sep;41(9):1462-9.
Clinical and pathologic features of chronic adriamycin toxicosis in rabbits.
Van Vleet JF, Ferrans VJ.
Chronic adriamycin (ADR) intoxication was produced in 50 weanling rabbits by weekly injections of ADR (2.4 mg/kg of body weight) for up to 17 weeks. All ADR-treated rabbits developed prominent alopecia, edema, moderate anemia, and severe emaciation. The frequency and severity of cardiomyopathy were not strongly dose-related, but renal lesions were. The frequency and severity of cardiomyopathic lesions were highest in left ventricular free wall and ventricular septum, intermediate in atria, and lowest in right ventricular free wall. Cardiac lesions increased in frequency and severity basally in left ventricular free wall, ventricular septum, and atria, but not in right ventricular free wall. Nephropathy lesions were selective for inner cortex and constitute a common and important side effect of chronic ADR intoxication in rabbits. Other lesions observed at necropsy were hepatic necrosis, skeletal muscle degeneration, osteodystrophy-associated fractures, peripancreatic fat necrosis, and testicular degeneration and atrophy.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7447139&dopt=Abstract
chu-stlouis.fr
The roles of androgen hypersecretion, in situ enzyme activity, and androgen receptors in androgenetic alopecia in women are still a matter of debate. We studied 187 women with alopecia, which we graded I, II, or III, according to Ludwig's classification, and 21 healthy control women. All participants were subjected to full basal and 1 h post-beta-1-24 corticotropin stimulation endocrine profiles. Abnormal hormone profiles were observed in 67% of the patients with alopecia alone (group A, n = 110) and in 84% of the patients with alopecia plus other symptoms of hyperandrogenism including acne, hirsutism, and menstrual cycle disturbances (group B, n = 77). Mean serum 5alpha-androstane-3alpha,17beta-diol glucuronide (3alpha-AdiolG) levels in all three patient groups (6.50+/-4.10, 8.90+/-5.80, and 14.70+/-8.90 nmol/l, respectively) correlated with the grade of alopecia (I-III) and were significantly higher than in the control group (4.80+/-2.05 nmol/l, P < 0.005). Mean serum sex hormone-binding globulin (SHBG) levels were inversely correlated with the grade of alopecia (I-III) and were significantly lower in all three patient groups (50.55+/-23.50, 40.00+/-17.65, and 38.80+/-14.10 nmol/l, respectively) than in the control group (61.15+/-17.65 nmol/l, P < 0.05). Mean serum levels of delta4-androstenedione, dehydroepiandrosterone, dehydroepiandrosterone sulfate, and 3alpha-AdiolG were higher in group B than in group A, and higher in group A than in the control group. The significant correlations found between adrenal secretion - either positive (with 3alpha-AdiolG levels and the body mass index) or negative (with SHBG levels) - might reflect the important contribution of secretory and metabolic components in the development of alopecia, the severity of which has been shown to be very closely related to observed levels of two of these parameters (3alpha-AdiolG and SHBG).
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11214820&dopt=Abstract
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