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hair related research references
Pediatr Dermatol. 2002 Nov-Dec;19(6):482-5.
Alopecia areata in children: a clinical profile.
Nanda A, Al-Fouzan AS, Al-Hasawi F.
Pediatric Dermatology Unit, Asad Al-Hamad Dermatology Center, Salmiya, Kuwait. artinandotmail.com
Alopecia areata (AA) is prevalent among children in Kuwait. In this prospective survey we studied 215 children with AA to determine their clinical and epidemiologic features. Ninety-seven percent of the children were of Arab ancestry. Girls outnumbered boys by a 2.5:1 ratio. The peak age of onset was seen between 2 and 6 years of age with a mean age of onset at 5.7 +/- 2.8 years. A majority of the patients (80.5%) had mild disease and extensive disease (more than 50% hair loss) was seen in 13% of the children. A positive family history of AA was obtained in 51.6% of cases and nail changes were seen in 26.5% of the children. The age of onset, a positive family history of AA, and associated atopic disorders were observed to have no influence on the extent and severity of the disease. The results were compared with those reported elsewhere for this age group.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12437546&dopt=Abstract
Dev Biol. 1999 Apr 15;208(2):362-74.
Association between mouse nude gene expression and the initiation of epithelial terminal differentiation.
Lee D, Prowse DM, Brissette JL.
Department of Dermatology, Massachusetts General Hospital, Charlestown, Massachusetts, 02129, USA.
Loss-of-function mutations in Whn (Hfh 11), a winged-helix/forkhead transcription factor, result in the nude mouse phenotype. To determine the whn expression pattern during development, we utilized mice in which a beta-galactosidase reporter gene was placed under the control of the wild-type whn promoter by homologous recombination (M. Nehls et al., 1996, Science 272, 886-889). Sites of reporter expression were confirmed by immunohistochemical staining for Whn protein or by in situ hybridization for whn mRNA. At all developmental stages, whn expression is restricted to epithelial cells. In addition to the skin and thymus, whn is expressed in the developing nails, nasal passages, tongue, palate, and teeth. In embryonic epidermis, suprabasal cells induce whn expression at the same time that terminal differentiation markers first appear. As the epidermis matures, whn promoter activity is found primarily in the first suprabasal layer, which contains keratinocytes in the early stages of terminal differentiation. In developing and mature anagen hair follicles, whn is expressed at high levels in the postmitotic precursor cells of the hair shaft and inner root sheath. Though principally associated with terminal differentiation, whn expression is also detected in progenitor cell compartments; in the hair bulb matrix and basal epidermal layer, a small subclass of cells expresses whn, while in the outer root sheath, whn promoter activity is induced as the follicle completes its elongation. Within these compartments, rare cells exhibit both whn expression and the nuclear proliferation marker Ki-67. The results suggest that whn expression encompasses the transition from a proliferative to a postmitotic state and that whn regulates the initiation of terminal differentiation. 1999 Academic Press.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10191051&dopt=Abstract
Inflamm Res. 2002 Sep;51(9):464-70.
Inducible expression of human endoglin during inflammation and wound healing in vivo.
Torsney E, Charlton R, Parums D, Collis M, Arthur HM.
Institute of Human Genetics, University of Newcastle upon Tyne, UK.
OBJECTIVE: Because angiogenesis and inflammation are intimately associated and endoglin is required for angiogenesis, we wished to determine whether it also plays a role in inflammation. METHODS: Using an immunohistochemical approach, we examined spatial and temporal changes in endoglin expression during inflammation and angiogenesis. RESULTS: We found low levels of endoglin expression in quiescent endothelium in a range of normal adult human tissues. However, constitutive levels of expression are higher in dermal capillaries surrounding hair follicles and in alveolar capillaries as well as in the high endothelial cells of lymph tissue. During inflammatory disease, endoglin expression is strongly upregulated and is consistently associated with an infiltrate of inflammatory cells. For the first time, we have determined the relative changes in endoglin expression from the normal quiescent state through the inflammatory changes and angiogenesis that occur during dermal wound healing in vivo using a timed human wound healing model. Endoglin expression increases rapidly, reaching a peak of expression co-incident with maximal T cell infiltrate and persisting at an elevated level for at least 28 days in both activated and proliferating endothelial cells. CONCLUSION: Enhanced endoglin expression is not limited to angiogenesis, it is also associated with inflammation.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12365720&dopt=Abstract
Environ Mol Mutagen. 2002;40(3):168-74.
Alterations of plasma antioxidants and mitochondrial DNA mutation in hair follicles of smokers.
Liu CS, Chen HW, Lii CK, Tsai CS, Kuo CL, Wei YH.
Department of Neuroscience and Neurology, Changhua Christian Hospital, Changhua, Taiwan.
The effects of long-term smoking on mitochondrial DNA (mtDNA) deletions in hair follicles were investigated in subjects with different antioxidant capacity. Twenty-two male smokers with a smoking index of greater than 5 pack-years and without any known systemic diseases were recruited for this study. Forty healthy nonsmoking males were included as controls. We found that the concentrations of ascorbate and alpha-tocopherol and the activities of glutathione S-transferase (GST) and glutathione peroxidase in blood plasma were significantly decreased in smokers. The levels of glutathione and protein thiols in whole blood and the incidence of a 4,977 bp deletion of mtDNA (dmtDNA) in hair follicles were significantly increased in smokers. A significantly higher incidence of the 4,977 bp dmtDNA was found in smokers with plasma GST activity less than 5.66 U/l (OR = 7.2, P = 0.020). Using multiple covariate ANOVA and logistic regression, we found that age and low plasma GST activity were the only two risk factors for the 4,977 bp dmtDNA. These results suggest that smoking depletes antioxidants and causes mtDNA deletions and that plasma GST may play an important role in the preservation of the mitochondrial genome in tissue cells of smokers. 2002 Wiley-Liss, Inc.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12355550&dopt=Abstract
Natural Herbal Supplement: Hair Million
The most ostensive feature that distinguishes us human from chimps and other primates is the lack of bodily hair. During evolutionary process, we have lost the majority of hair. Hair is no longer a biologically essential part of our body, just
like appendix. The hair we still have on our scalp and a few other bodily parts is still regarded as significant for reasons other than biological necessity. Hair loss is naturally accompanied by aging process, although the extent of hair loss and the timing of onset vary widely among individuals. Thus, loss of hair and baldness is considered as a symbol of maturity or old age. Like winkles and other signs of aging, hair loss is not welcome by most people, because we don't welcome aging, and being perceived as an aging person. However, it is alopecia, or premature hair loss that especially concerns certain people.
While the hair loss and resulting baldness in general have not been proven to be related to underlying health problems, there are certain correlations between hair loss and health problems. For instance, premature hair loss could suggest premature aging or nutritional and hormonal imbalance, stressful life, use of drugs that cause hair loss as a side effect, skin disease, or heart disease. The balding appearance could also impart a subdued impression of integrity in bodily health and youthfulness.
Fortunately, in many cases, hair loss is reversible by change in lifestyle and/or nutritional supplementation. Herbal hair growth formula and other nutritional supplements have been shown to be effective in warding off hair loss and resuming hair growth. Certain prescription drugs such as Propecia may also reverse hair loss by blocking the formation of DHT, a hormonal byproduct produced inceasingly as a person age.
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.
Our bodies produce decreasing amount of DHEA as we get older.
various health benefits: To deter aging,
improve sexual function/erectile dysfunction, treat cognitive decline, enhance athletic performance,
facilitate weight loss, improve strength, prevent osteoporosis, enhance immunomodulation for rheumatic conditions,
and treat depression.
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