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Colon cleansing, Laxative||ViaVita, Lecithin for healthy liver
Fatty acids resources:
Pathogen research abs 1 || Pathogen research abs 2 || Pathogen research abs 3 || Pathogen research abs 4 || Pathogen research abs 5 ||
Hormone and endocrine research abs 1 || Hormone and endocrine research abs 2 || Hormone and endocrine research abs 3 || Hormone and endocrine research abs 4 || Hormone and endocrine research abs 5
Peptides. 2002 Dec;23(12):2181-7.
Intraventricular insulin decreases kappa opioid-mediated sucrose intake in rats.
Sipols AJ, Bayer J, Bennett R, Figlewicz DP.
Institute of Experimental and Clinical Medicine, and Faculty of Medicine, University of Latvia, Riga, Latvia.
The hormone insulin acts in the central nervous system (CNS) as a regulator of body adiposity and food intake. Recent work from our laboratory has provided evidence that one way by which insulin may decrease food intake is by decreasing the rewarding properties of food. Evidence from others suggests that endogenous opioids may mediate the palatable properties of foods, and insulin may decrease nonfood-related reward via interaction with some CNS kappa opioid systems. In the present study we examined the ability of insulin to interact with exogenous or endogenous kappa opioids to modulate feeding of palatable sucrose pellets by nondeprived rats. Insulin (5 mU intracerebroventricular (i.c.v.), t=-3h) completely reversed the ability of the exogenous kappa agonist U50,488 (26 microg, i.c.v., t=-15 min) to stimulate 90-min sucrose feeding (211+/-32% reduced to 125+/-23% of 90-min baseline intake). Further, i.c.v. insulin (5 mU, t=-3h) interacted with a subthreshold dose of the kappa receptor antagonist norbinaltorphimine (5 microg, i.c.v., t=-15 min) to decrease the 90-min sucrose intake baseline (77+/-11% versus 109+/-10% of 90 min baseline intake, insulin/norbinaltorphimine versus norbinaltorphimine). Together these studies provide new evidence that insulin in the CNS may decrease the action of CNS kappa opioid system(s) that mediate palatable feeding.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12535697&dopt=Abstract
J Biol Chem. 2003 Feb 21;278(8):5871-82. Epub 2002 Dec 16.
Expression of the serum- and glucocorticoid-inducible protein kinase, Sgk, is a cell survival response to multiple types of environmental stress stimuli in mammary epithelial cells.
Leong ML, Maiyar AC, Kim B, O'Keeffe BA, Firestone GL.
Department of Molecular and Cell Biology and The Cancer Research Laboratory, The University of California at Berkeley, Berkeley, California 94720-3200, USA.
The effects of multiple stress stimuli on the cellular utilization of the serum- and glucocorticoid-inducible protein kinase (Sgk) were examined in NMuMg mammary epithelial cells exposed to hyperosmotic stress induced by the organic osmolyte sorbitol, heat shock, ultraviolet irradiation, oxidative stress induced by hydrogen peroxide, or to dexamethasone, a synthetic glucocorticoid that represents a general class of physiological stress hormones. Each of the stress stimuli induced Sgk protein expression with differences in the kinetics and duration of induction and in subcellular localization. The environmental stresses, but not dexamethasone, stimulated Sgk expression through a p38/MAPK-dependent pathway. In each case, a hyperphosphorylated active Sgk protein was produced under conditions in which Akt, the close homolog of Sgk, remained in its non-phosphorylated state. Ectopic expression of wild type Sgk or of the T256D/S422D mutant Sgk that mimics phosphorylation conferred protection against stress-induced cell death in NMuMg cells. In contrast, expression of the T256A/S422A Sgk phosphorylation site mutant has no effect on cell survival. Sgk is known to phosphorylate and negatively regulate pro-apoptotic forkhead transcription factor FKHRL1. The environmental stress stimuli that induce Sgk, but not dexamethasone, strongly inhibited the nuclear transcriptional activity and increased the cytoplasmic retention of FKHRL1. Also, the conditional IPTG inducible expression of wild type Sgk, but not of the kinase dead T256A mutant Sgk, protected Con8 mammary epithelial tumor cells from serum starvation-induced apoptosis. Taken together, our study establishes that induction of enzymatically active Sgk functions as a key cell survival component in response to different environmental stress stimuli.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12488318&dopt=Abstract
Clin Endocrinol (Oxf). 2002 Jun;56(6):735-43.
Dysregulation of iodothyronine deiodinase enzyme expression and function in human pituitary tumours.
Tannahill LA, Visser TJ, McCabe CJ, Kachilele S, Boelaert K, Sheppard MC, Franklyn JA, Gittoes NJ.
Division of Medical Sciences, University of Birmingham, Queen Elizabeth Hospital, Edgbaston, UK.
OBJECTIVE: Thyroid hormones (THs) perform essential roles in pituitary function. They regulate anterior pituitary hormone secretion and are also key determinants of pituitary cell proliferation and differentiation. The critical role of deiodinase enzymes, which serve as prereceptor regulators of TH action, remains largely unexplored. Three deiodinase enzymes metabolize active and inactive THs and thereby determine tissue concentrations of the biologically active ligand, tri-iodothyronine (T3). We hypothesized that aberrant expression of deiodinase enzymes and/or altered enzyme activity in pituitary tumours may change tissue concentrations of THs and influence their growth and secretory characteristics. STUDY DESIGN AND PATIENTS: We studied 105 pituitary tumours and 10 normal pituitaries for expression of deiodinase enzyme mRNAs encoding types 1 (D1), 2 (D2) and 3 (D3) using real-time RT-PCR. Enzyme activity data from 20 pituitary samples were also obtained. RESULTS: Pituitary tumours expressed significantly increased D3 mRNA (6.5-fold, P < 0.0005) compared with normal pituitaries. D2 mRNA was also increased 2.6-fold (P = 0.005) in pituitary tumours compared with normals. The rare TSH-secreting pituitary tumour subtype expressed a 13.1-fold excess of D3 mRNA and reduced D2 mRNA (0.1-fold of normal pituitaries). D2 mRNA expression in ACTH-secreting tumours was similarly reduced to 0.1-fold that in normal pituitaries. CONCLUSIONS: Pituitary adenomas express abnormal levels of deiodinase enzymes compared to normal pituitaries. These abnormalities may have functional consequences on pituitary tumour growth. In the case of TSH-secreting pituitary adenomas, the observed pattern of deiodinase mRNA expression may explain the 'resistance' of this tumour type to TH feedback.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12072042&dopt=Abstract
Clin Endocrinol (Oxf). 2002 Jun;56(6):759-63.
Sympathetic nerve hyperactivity is associated with increased peripheral vascular resistance in hypopituitary patients with growth hormone deficiency.
Scott EM, Greenwood JP, Stoker JB, Mary DA, Gilbey SG.
Department of Endocrinology, St. James's University Hospital, Leeds, UK.
OBJECTIVE: Hypopituitary patients with untreated GH deficiency have increased cardiovascular mortality. Sustained vasoconstriction is an important factor in the development of hypertension and insulin resistance. This study was designed to see whether peripheral vascular resistance was increased in subjects with GH deficiency and to examine the mechanisms involved. METHODS: Nine patients with GH deficiency and nine matched control subjects were studied. Calf vascular resistance was measured by venous occlusion plethysmography and sympathetic vasoconstrictor nerve activity by peroneal microneurography. RESULTS: Subjects with GH deficiency had a significantly lower blood flow (by 31%) and higher vascular resistance (by 48%) than the control group. In addition, they had a significantly higher sympathetic vasoconstrictor activity (by 67%) and this correlated with the vascular resistance (r = 0.45; P < 0.04). CONCLUSIONS: Patients with GH deficiency have an increased peripheral vascular resistance that is contributed to by an increase in central sympathetic vasoconstrictor discharge to the peripheral vasculature. This could be important in the development of cardiovascular disease in this condition.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12072045&dopt=Abstract
Clin Endocrinol (Oxf). 2002 Jun;56(6):765-71.
Endocrine responses to ghrelin in adult patients with isolated childhood-onset growth hormone deficiency.
Aimaretti G, Baffoni C, Broglio F, Janssen JA, Corneli G, Deghenghi R, van der Lely AJ, Ghigo E, Arvat E.
Department of Internal Medicine, University of Turin, Italy.
OBJECTIVE: Ghrelin, a 28 amino acid acylated peptide, is a natural ligand of the GH secretagogues (GHS) receptor (GHS-R), which is specific for synthetic GHS. Similar to synthetic GHS, ghrelin strongly stimulates GH secretion but also displays significant stimulatory effects on lactotroph and corticotroph secretion. It has been hypothesized that isolated GH deficiency (GHD) could reflect hypothalamic impairment that would theoretically involve defect in ghrelin activity. PATIENTS: In the present study, we verified the effects of ghrelin (1 microg/kg i.v.) on GH, PRL, ACTH and cortisol levels in adult patients with isolated severe GHD [five males and one female, age (mean +/- SEM) 24.7 +/- 2.6 years, BMI 25.7 +/- 2.7 kg/m2]. In all patients, the GH response to insulin-induced hypoglycaemia (ITT, 0.1 IU regular insulin i.v.) and GH releasing hormone (GHRH) (1 microg/kg i.v.) + arginine (ARG, 0.5 g/kg i.v.) was also studied. The hormonal responses in GHD were compared with those in age-matched normal subjects (NS, seven males, age 28.6 +/- 2.9 years, BMI 22.1 +/- 0.8 kg/m2). RESULTS: IGF-I levels in GHD were markedly lower than in NS (69.8 +/- 11.3 vs. 167.9 +/- 19.2 microg/l, P < 0.003). Ghrelin administration induced significant increase in GH, PRL, ACTH and cortisol levels in all GHD. In GHD, the GH response to ghrelin was higher (P < 0.05) than that to GHRH + ARG, which, in turn, was higher (P < 0.05) than that to ITT (9.2 +/- 4.1 vs. 5.3 +/- 1.7 vs. 1.4 +/- 0.4 microg/l). These GH (1 microg/l = 2 mU/l) responses in GHD were markedly lower (P < 0.0001) than those in NS (ghrelin vs. GHRH + ARG vs. ITT 92.1 +/- 16.7 vs. 65.3 +/- 8.9 vs. 17.7 +/- 3.5 microg/l). In GHD, the highest individual peak GH response to ghrelin was markedly lower than the lowest peak GH response in NS (28.5 vs. 42.9 microg/l). GHD and NS showed overlapping PRL (1 microg/l = 32 mU/l) (10.0 +/- 1.4 vs. 14.9 +/- 2.2 microg/l), ACTH (22.3 +/- 5.3 vs. 18.7 +/- 4.6 pmol/l) and cortisol responses (598.1 +/- 52.4 vs. 486.9 +/- 38.9 nmol/l). CONCLUSIONS: This study shows that ghrelin is one of the most powerful provocative stimuli of GH secretion, even in those patients with isolated severe GHD. In this condition, however, the somatotroph response is markedly reduced while the lactotroph and corticotroph responsiveness to ghrelin is fully preserved, indicating that this endocrine activity is fully independent of mechanisms underlying the GH-releasing effect. These results do not support the hypothesis that ghrelin deficiency is a major cause of isolated GH deficiency but suggest that ghrelin might represent a reliable provocative test to evaluate the maximal GH secretory capacity provided that appropriate cut-off limits are assumed.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12072046&dopt=Abstract
Like developmental biology of any part of our body, hair growth is a complicated process. Hence the homework for
modern science to yet unravel the process and mechanism to a completion. There exist a number of traditional and alternative therapeutic methods that include drugs, surgery, suppelements, and even snake oils that have been developed and used for those who lose hair.
No understanding, and there is no solution. Of course, none of these approaches are perfect for all hair loss problems, especially due to the heterogeneity of the causes underlying hair losses. Most of chemical drugs and hair transplantation surgeries are accompanied by undesirable side effects.
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