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Endocrinology 2002 Nov;143(11):4389-96
Vitamin D3 analogs stimulate hair growth in nude mice.
The active form of vitamin D3 can regulate epidermal keratinization by inducing terminal differentiation; and mice lacking the vitamin D receptor display defects leading to postnatal alopecia. These observations implicate the vitamin D3 pathway in regulation of hair growth. We tested the ability of 1,25 dihydroxyvitamin D3 and its synthetic analogs to stimulate hair growth in biege/nude/xid (BNX) nu/nu (nude) mice exhibiting congenital alopecia. Nude mice were treated with different vitamin D3 analogs at doses that we had previously found to be the highest dose without inducing toxicity (hypercalcemia). The mice were monitored for hair growth and were scored according to a defined scale. Skin samples were taken for histological observation of hair follicles and for extraction of RNA and protein. Vitamin D3 analogs dramatically stimulated the hair growth of nude mice, although parental 1,25 dihydroxyvitamin D3 had no effect. Hair growth occurred in a cyclical pattern, accompanied by formation of normal hair follicles and increased expression of certain keratins (Ha7, Ha8, and Hb3). Vitamin D3 analogs seem to act on keratinocytes to initiate hair follicle cycling and stimulate hair growth in mice that otherwise do not grow hair.
Eur J Endocrinol 2002 Sep;147(3):357-61
An endocrinopathy characterized by dysfunction of the pituitary-adrenal axis and alopecia universalis: supporting the entity of a triple H syndrome.
We demonstrate the rare disorder of triple H syndrome in a 25-year-old man. He was pointed out as having short stature, at -5.9 s.d., and diagnosed as GH deficient at 6 years old. Approximately a year ago, he noticed systematic hair loss. He lost body weight by 7 kg during the last half year. He was admitted to Jichi Medical School Hospital because of unconsciousness. Physical findings showed disturbance of consciousness with Japan Coma Scale I-3. He had emaciation and alopecia universalis. Laboratory findings showed plasma glucose was as low as 1.11 mmol/l. GH and ACTH deficiency with hypoadrenocorticism were clarified. His intelligence was in the low normal range with a WAIS IQ of 70, and anterograde amnesia was suggested in the presence of a little, but not significant, morphological change in the hippocampus on a magnetic resonance imaging scan. Replacement by a physiological dose of hydrocortisone normalized plasma glucose, and restored body weight and growth of hair during the 7 month therapeutic period. The present finding strongly supports a clinical entity of triple H syndrome, including ACTH deficiency, alopecia universalis and anterograde amnesia, and that there may be some variation of the triad among the subjects.
J Invest Dermatol 2002 Jul;119(1):32-7
Defolliculated (dfl): a dominant mouse mutation leading to poor sebaceous gland differentiation and total elimination of pelage follicles.
Defolliculated is a novel spontaneous mouse mutation that maps to chromosome 11 close to the type I keratin locus. Histology shows abnormal differentiation of the sebaceous gland, with the sebocytes producing little or no sebum and undergoing abnormal cornification. The hair follicles fail to regress during catagen leading to abnormally long follicles. In contrast the hair shafts are shorter than normal, suggesting altered differentiation or proliferation of matrix cells during anagen. The shafts emerge from the follicle with cornified material still attached. The dermis contains increased numbers of immune cells, including T cells (CD4-positive), macrophages, and mast cells, at all time points examined. Complete elimination of all pelage and tail follicles occurs after two to three hair cycles, apparently by necrosis. Defolliculated may be a useful model for determining further functions of the sebaceous gland, and for understanding the regulation of catagen and hair follicle immunology.
J Cutan Med Surg 2002 Jan-Feb;6(1):1-9
Effects of finasteride on apoptosis and regulation of the human hair cycle.
BACKGROUND: A number of studies have provided evidence that apoptosis is a central element in the regulation of hair follicle regression. In androgenetic alopecia (AGA), the exact location and control of key players in the apoptotic pathways remains obscure. OBJECTIVE: In the present study, we used a panel of antibodies and investigated the spatial and cellular pattern of expression of caspases and inhibitors of apoptosis (IAPs), such as XIAP and FLIP, in men with normal scalp and in men with AGA before and after 6 months of treatment with 1 mg oral finasteride treatment. METHODS AND RESULTS: Constitutive expression of caspases-1, -3, -8, and -9 and XIAP was detected predominantly within the isthmic and infundibular hair follicle area, basilar layer of the epidermis, and eccrine and sebaceous glands. AGA-affected tissues showed an increase in caspase (-1, -3, -6, -9) immunoreactivity with a concomitant decrease in XIAP staining. After 6 months of finasteride treatment, both caspases and XIAP were similar to levels exhibited by normal subjects. Immunoblot analysis was performed to determine antibody specificity and cellular expression of caspases. Purified populations of keratinocytes, melanocytes, dermal papilla, and dermal fibroblasts derived from human hair follicles were cultured in vitro and treated with 0.5 mm staurosporin. Time-course experiments revealed that processing of caspase-3 is a principal event during apoptosis of these hair cell types. CONCLUSION: These data suggest that alterations in levels of caspases and IAPs regulate hair follicle homeostasis. Moreover, finasteride appears to influence caspase and XIAP expression in hair follicle cells thus signaling anagen, active growth in the hair cycle.
Being such a complex biological process, hair growth biology is still a work in progress. Noetheless, several therapeutic methods, including drugs, surgery, and suppelements have been in use to help those who attempt to restore their hair. None of these approaches are perfect due to the diversity in the causes underlying hair loss. Also, most of chemical drugs and hair transplantation surgeries are accompanied by undesirable side effects.
DreamPharm offers Hair Million to address hair loss problems. Numerous anecdotal cases have demonstrated that this herbal formula based on authentic Chinese herbs actually improves the age-related hair thinning and hair loss among a significant fraction of people who take it regularly. We still do not understand the mechanisms of action as to how Hair Million works to stop hair loss and promote hair growth, despite all the positive anecdotal observations. Neither scientific research nor placebo controlled clinical analysis has been conducted because it will cost dearly. Lack of scientific/clinical research is quite common in herbal arena. Just because science hasn't scrutinized we should not stop taking daily food and herbal supplements altogether: our life must go on until we have better understandings of food and herb. There are two merits in this hair restoration herbal formula: Firstly, Hair Million is relatively inexpensive, and secondly, it is made of edible herbs that are known to be safe when consumed in regular quantities.
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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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