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Eur Arch Otorhinolaryngol. 2002 Apr;259(4):205-10.
Analysis of sex-hormone-receptor expression in laryngeal carcinoma.

Hagedorn HG, Nerlich AG.

Department of Otolaryngology, Head and Neck Surgery, Ludwig Maximilian University, Grosshadern Medical Center, Munich, Germany. i.h.hagedor-online.de

There are significant differences in how laryngeal cancer affects the two genders, with cases occuring predominantly in males. This has been speculated to result from the different susceptibilities of the tumor cells to steroid sex hormones. Since the sex hormone action is mediated by specific cellular receptors, several previous studies have analyzed the presence of these sex-hormone receptors. However, the data on the receptor status for androgen, estrogen and progesterone receptors in laryngeal carcinomas are controversial. Since some authors have suggested antiandrogen or antiestrogen therapy as an adjuvant treatment for laryngeal carcinoma, we performed a comprehensive study using immunomorphological and biochemical techniques on both in-vivo and in-vitro tumor cells in order to clarify whether major sex-hormone receptors are present or not. We performed an immunohistochemical analysis on 13 patients with laryngeal carcinomas, 8 males and 5 females, using monoclonal antibodies against androgen, estrogen and progesterone receptors. In addition, the presence of estrogen and progesterone receptors was tested biochemically using an enzyme immune assay (EIA). Furthermore, we analyzed immunohistochemically the expression of the hormone receptors in five keratinocyte cell lines originating from laryngeal carcinomas. In all of our tumor samples, as well as in the five tumor cell lines tested, we did not detect any specific immunohistochemical staining for androgen, estrogen and progesterone receptors in the laryngeal carcinoma cells when compared to the positive controls of breast and prostate cancer samples. Similarly, the biochemical analysis did not demonstrate any significant amount of receptor protein in the analyzed cases. In conclusion, the absence of male and female sex-hormone receptors strongly argues against laryngeal carcinomas being sex-hormone-dependent tumors. Therefore, we do not see any rational indication to use a specific antiandrogen or antiestrogen therapy for the adjuvant treatment of laryngeal carcinomas.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12064509&dopt=Abstract

Cell Mol Neurobiol. 2002 Feb;22(1):35-46.
Cell swelling induced secretion of TRH by posterior pituitary, hypothalamic paraventricular nucleus and pancreatic islets: effect of L-canavanine.

Najvirtova M, Baqi L, Kucerova J, Strbak V.

Laboratory of Neurohumoral Regulations, Institute of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava.

The aims of this study were to test if ethanol induces thyrotropin-releasing hormone (TRH) secretion in vitro from the posterior pituitary and hypothalamic explants by a mechanism involving cell swelling, and to characterize the pathway of stimulated secretion. Ethanol, at a concentration of 80 mM, stimulated the release of TRH from the posterior pituitary, the hypothalamic paraventricular nucleus, the median eminence, and the brain septum, when administered only in isosmolar but not in hyperosmolar medium. This indicates the involvement of a cell swelling-inducing mechanism. L-canavanine in a concentration of 3 mM, increased the basal and hyposmosis-induced TRH secretion from the posterior pituitary and the paraventricular nucleus, and both basal and ethanol-induced TRH secretion from isolated pancreatic islets. This indicates the presence of both constitutive and regulatory secretory pathways. Our results suggest that cell swelling induces exocytosis from clathrin coated granules.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12064516&dopt=Abstract

J Rheumatol. 2002 Jun;29(6):1252-61.
Corticotropin releasing hormone (CRH) antagonist attenuates adjuvant induced arthritis: role of CRH in peripheral inflammation.

Webster EL, Barrientos RM, Contoreggi C, Isaac MG, Ligier S, Gabry KE, Chrousos GP, McCarthy EF, Rice KC, Gold PW, Sternberg EM.

Integrative Neural-Immune Program, Section on Neuroendocrine Immunology and Behavior, National Institute of Mental Health, National Institutes of Health, Bethesda 20892, USA.

OBJECTIVE: To determine whether a corticotropin releasing hormone (CRH) type 1-specific receptor antagonist, antalarmin, would alter the progression of inflammation in adjuvant induced arthritis (AIA) susceptible LEW/N rats by blocking local CRH mediated inflammatory responses or render AIA resistant F344/N rats more susceptible to AIA by blocking central CRH, thus reducing secretion of endogenous glucocorticoids. METHODS: F344/N and LEW/N rats were assigned to either drug or vehicle groups and treated with 20 mg/kg antalarmin or vehicle alone BID for 25 days by intraperitoneal injection. Arthritis was induced in both antalarmin and vehicle treated LEW/N and F344/N rats by subcutaneous injections at the base of the tail of incomplete Freund's adjuvant containing 10 mg/ml heat killed Mycobacterium tuberculosis. Control F344/N and LEW/N rats were maintained on either antalarmin or vehicle. RESULTS: Chronic blockade of CRH-R1 with systemic antalarmin significantly ameliorated AIA in LEW/N rats, reducing the severity of inflammation in peripheral joints, evidenced by clinical and histopathology scores, and weight loss associated with disease onset. Antalarmin neither induced nor exacerbated arthritis expression in F344/N or LEW/N rats, despite suppression of levels of adjuvant induced corticosterone, the major antiinflammatory glucocorticoid in rats. CONCLUSION: Systemic blockade of CRH-RI appeared to predominantly block peripheral proinflammatory effects of immune CRH, rather than the systemic glucocorticoid mediated antiinflammatory effects of hypothalamic CRH. Results indicate that chronic treatment with a CRH antagonist attenuates progressive inflammation induced degeneration of synovia, cartilage, and bone in arthritic joints, suggesting that antalarmin may have therapeutic potential in treatment of human autoimmune and inflammatory disorders.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12064844&dopt=Abstract

J Rheumatol. 2002 Jun;29(6):1296-300.
Linear growth and final height in patients with systemic juvenile idiopathic arthritis treated with longterm glucocorticoids.

Simon D, Fernando C, Czernichow P, Prieur AM.

Department of Endocrinology and Diabetology, Robert Debre Hospital, Paris, France.

OBJECTIVE: To assess linear growth and final height in patients given glucocorticoids during childhood for systemic juvenile idiopathic arthritis (JIA). METHODS: Heights throughout followup for JIA and final height were recorded in 24 patients. Height data were expressed as the height standard deviation score for chronological age (HSDS/CA). Final height was compared to reference values for the French population and to target height. RESULTS: During glucocorticoid therapy, mean loss of HSDS/CA was -2.7 +/- 1.5 and was positively correlated with prednisone therapy duration (p < 0.01). After prednisone discontinuation, 17 patients (70%) had catch-up growth and 7 (30%) continued to experience slow linear growth. Mean final height was -2.0 +/- 1.8 HSDS and was correlated with mean height at prednisone discontinuation (p < 0.0001). Mean final height was significantly greater in the patients with catch-up growth at prednisone discontinuation (-1.5 +/- 1.6 vs -3.6 +/- 1.2 HSDS), and 87% of patients had a final height below their target height. CONCLUSION: These data suggest that chronic inflammation and prednisone therapy may adversely affect growth in patients with JIA, and that final height may be closely dependent both on the severity of growth retardation during the active phase of the disease and on linear growth after remission. Thus treatments like growth hormone presently under investigation to improve final height may be most effective when given early after disease onset and/or at remission.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12064849&dopt=Abstract

Med J Aust. 2002 Jun 17;176(12):584-7.
Thyroid neoplasia following irradiation in adolescent and young adult survivors of childhood cancer.

Somerville HM, Steinbeck KS, Stevens G, Delbridge LW, Lam AH, Stevens MM.

The Children's Hospital at Westmead, Sydney, NSW. helenhw.edu.au

OBJECTIVES: To describe a cohort of survivors of childhood malignancy at risk of developing thyroid abnormality, and propose guidelines for management of such patients. DESIGN: Retrospective case series. SETTING: Late-effects oncology clinic at a large children's hospital in Sydney. SUBJECTS: 142 patients who had received irradiation to the thyroid from the 1970s onwards, who attended the late-effects clinic from May 1989 to December 1998. INTERVENTIONS: Thyroid palpation by an endocrinologist or surgeon, serum thyroid-stimulating hormone assay and thyroid ultrasound examination were performed on all subjects and, depending on findings, some subjects proceeded to fine-needle biopsy or surgery (total thyroidectomy). A few patients required adjuvant (131)I administration. OUTCOME MEASURES: Radiation dose received; results of thyroid palpation; thyroid function tests; ultrasound findings; diagnosis of the abnormalities; and outcomes of surgical interventions. RESULTS: 49 subjects (24 of 65 patients who received scatter irradiation to the thyroid and 25 of 78 patients who received direct irradiation) had thyroid surgery. Of these, 12 in the scatter and six in the direct irradiation group were found to have thyroid malignancy. Fifty subjects with abnormal ultrasound results remain under surveillance. Having a palpable thyroid was predictive of malignancy, but age at original diagnosis, sex, current age, time since irradiation, radiation dose, nodule type and nodal involvement were not. CONCLUSION: There is a significant risk of cancer in thyroid glands exposed to radiation as part of therapy for childhood cancer. This risk is greater for patients who received scatter (versus direct) irradiation. Nodular change is usually not apparent for many years, so lifelong surveillance is necessary. Palpation alone is not sufficient to detect thyroid cancer and thyroid ultrasound examination is recommended.

online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12064957&dopt=Abstract

Hair loss is a problem in modern soceity. Examining the factors of hair growth may shed light on how hair loss might occur. How long can hair grow before it stops growing eventually if it does? Given that the hair growth rate is quite uniform and constant, somewhere between 0.3-0.5 millimeters per day, it's believed that the length of anagen, the growth phase, differs among individuals, and this is the major determinant to the maximum hair length. For some individuals, anagen may last ten years. Of course the length of the anagen is governed by genes, and the genetic background of the individuals. Non-genetic factors such as nutritional condition, weather, seasonal changes (hair may grow a bit faster during winter), taking medications, health condition may of course influence the rate of hair growth as well as hair loss. The shape of the hair, straight or curly, is dependent on the shape of the follicle. A circular or round hair follicle would generate straight hair, while the follicle with oval or elliptical shapes (in its cross-section) would produce a curly hair.

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