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References: Hair growth and hair loss

J Am Acad Dermatol. 1990 Feb;22(2 Pt 1):242-50.
Oral cyclosporine for the treatment of alopecia areata. A clinical and immunohistochemical analysis.

Gupta AK, Ellis CN, Cooper KD, Nickoloff BJ, Ho VC, Chan LS, Hamilton TA, Tellner DC, Griffiths CE, Voorhees JJ.

Department of Dermatology, University of Michigan Medical Center, Ann Arbor 48109-0314.

Cyclosporine inhibits the activation of helper T cells that may be pathogenic in alopecia areata. Therefore we treated six patients with alopecia areata (five men, one woman) with oral cyclosporine, 6 mg/kg/day for 12 weeks. Three patients had alopecia universalis, one had alopecia totalis, and two had patchy alopecia areata of the scalp. Hair regrowth in the scalp of all patients occurred within the second and fourth weeks of therapy, followed by hair regrowth of the face and chest (in the male patients), pubic area, extremities, and axillae. Overall, the site of best response was the scalp. Cosmetically acceptable terminal hair regrowth on the scalp occurred in three of six patients. Significant hair loss, however, occurred in all patients within 3 months of discontinuation of cyclosporine treatment. Clinical response correlated with changes in immune cell infiltration of the hair follicles. The number of leukocytes per hair follicle was quantified in transverse scalp biopsy sections stained with a panel of monoclonal antibodies. The degree of terminal hair regrowth correlated significantly with decreases in follicular epithelial human lymphocyte antigen-DR and intercellular adhesion molecule-1 expression, T cells, helper/inducer (CD4) T cells, suppressor/cytotoxic (CD8) T cells and Langerhans cells (CD1+DR+) from the hair follicles during cyclosporine therapy. A significant decrease in the CD4/CD8 ratio occurred early in the course of treatment and was maintained throughout the therapy. This decrease suggests that cyclosporine not only cleared immune cells from the hair follicles but also altered the balance of regulatory lymphocytes.(ABSTRACT TRUNCATED AT 250 WORDS)

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2138175&dopt=Abstract

Differentiation. 1999 Oct;65(2):97-112.
Expression of MK6a dominant-negative and C-terminal mutant transgenes in mice has distinct phenotypic consequences in the epidermis and hair follicle.

Wojcik SM, Imakado S, Seki T, Longley MA, Petherbridge L, Bundman DS, Bickenbach JR, Rothnagel JA, Roop DR.

Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030, USA.

Mouse keratin 6a (MK6a) is constitutively expressed in a single cell layer of the outer root sheath (ORS) of hair follicles, but its synthesis can be induced in interfollicular epidermis including the basal cell layer in response to perturbing stimuli. A basally inducible human K6 (HK6) isoform has not been described, and it is not clear which of the known HK6 isoforms is expressed in the ORS. In this study we show that expression of a dominant-negative MK6a construct (Delta2B-P) in the interfollicular epidermis caused severe blistering and neonatal lethality, suggesting that mutations in a yet to be identified basally expressed HK6 isoform might result in a severe blistering phenotype. Surviving Delta2B-P animals showed transgene expression only in isolated epidermal cells and not in all cells of the ORS, but nevertheless developed severe alopecia. Expression of two different C-terminal mutant transgenes also caused alopecia while a third C-terminal mutant had no phenotypic conse- quences. Electron microscopy revealed that Delta2B-P expression resulted in the collapse of keratin filaments, while destruction of hair follicles in the two phenotypic C-terminal mutant lines occurred in the absence of filament abnormalities. The latter finding indicates that the innermost ORS cells are uniquely sensitive to expression of even slightly altered K6 proteins, suggesting that mutations affecting an HK6 isoform expressed in this cell layer could result in alopecia in humans as well.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10550543&dopt=Abstract

Clin Endocrinol (Oxf). 1990 Jan;32(1):1-12.
Plasma C19 steroid sulphate levels and indices of androgen bioavailability in female pattern androgenic alopecia.

Montalto J, Whorwood CB, Funder JW, Yong AB, Callan A, Davies HE, Connelly JF.

Department of Clinical Biochemistry, Royal Children's Hospital, Parkville, Victoria, Australia.

Female pattern androgenic alopecia (AA) is a relatively common endocrine abnormality in premenopausal women. However, unlike hirsutism, little is known about the androgen metabolism and plasma C19 steroid sulphate profiles in this disorder. We have therefore measured the plasma levels of dehydroepiandrosterone sulphate (DHEA-S), 5-androstene-3 beta,17 beta-diol sulphate (5-ADIOL-S), 5 alpha-androstane-3 alpha, 17 beta-diol sulphate (3 alpha-DIOL-S), androstenedione (AD), total testosterone (T), free testosterone (FT), sex hormone binding globulin (SHBG), non-SHBG bound T, luteinizing hormone (LH) and follicle stimulating hormone (FSH), and have calculated the free androgen index (FAI): 100 x T (nmol/l) divided by SHBG (nmol/l), in premenopausal women with AA (n = 25-45) and in normal premenopausal women (n = 17-73). While mean plasma concentrations of DHEA-S and T were not significantly different from controls, mean SHBG concentrations were significantly lower (47 +/- 3 vs 64 +/- 3 nmol/l) and the mean free androgen index (4.4 +/- 0.4 vs 2.4 +/- 0.2), and mean concentrations of free testosterone (45 +/- 5 vs 26 +/- 1.4 pmol/l), non-SHBG bound T (0.9 +/- 0.2 vs 0.6 +/- 0.1 nmol/l) and androstenedione (4.3 +/- 0.3 vs 3.4 +/- 0.2 nmol/l) were significantly elevated in women with AA. Furthermore, mean plasma concentrations of 5-ADIOL-S (512 +/- 42 nmol/l) and 3 alpha-DIOL-S (76 +/- 7 nmol/l) were significantly higher than levels found in normal women (272 +/- 12 nmol/l and 52 +/- 2 nmol/l respectively). The nature of the hyperandrogenism associated with AA may thus only be revealed by a comprehensive plasma androgen and androgen sulphate profile, which may explain apparently aberrant data for a given patient. In addition, 5-ADIOL-S and 3 alpha-DIOL-S may serve as excellent plasma markers of both the existence of the disorder and the efficacy of its treatment.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2139595&dopt=Abstract

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