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  • Articles  (7)
  • American Association for the Advancement of Science (AAAS)  (5)
  • De Gruyter  (2)
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  • Articles  (7)
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  • 1
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    The endocrine regulation of aging by insulin-like signals (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-01
    Description: Reduced signaling of insulin-like peptides increases the life-span of nematodes, flies, and rodents. In the nematode and the fly, secondary hormones downstream of insulin-like signaling appear to regulate aging. In mammals, the order in which the hormones act is unresolved because insulin, insulin-like growth factor-1, growth hormone, and thyroid hormones are interdependent. In all species examined to date, endocrine manipulations can slow aging without concurrent costs in reproduction, but with inevitable increases in stress resistance. Despite the similarities among mammals and invertebrates in insulin-like peptides and their signal cascade, more research is needed to determine whether these signals control aging in the same way in all the species by the same mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tatar, Marc -- Bartke, Andrzej -- Antebi, Adam -- New York, N.Y. -- Science. 2003 Feb 28;299(5611):1346-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12610294" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Animals ; Caenorhabditis elegans/genetics/physiology ; *Caenorhabditis elegans Proteins ; Caloric Restriction ; Drosophila melanogaster/genetics/physiology ; Endocrine System/*physiology ; Forkhead Transcription Factors ; Gene Expression Regulation ; Growth Hormone/metabolism ; Humans ; Insect Hormones/physiology ; Insulin/*metabolism ; *Longevity ; Mice ; *Signal Transduction ; Somatomedins/*metabolism ; Transcription Factors/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Dietary restriction and life-span (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bartke, Andrzej -- Wright, J Chris -- Mattison, Julie A -- Ingram, Donald K -- Miller, Richard A -- Roth, George S -- New York, N.Y. -- Science. 2002 Jun 21;296(5576):2141-2; author reply 2141-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12094784" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carrier Proteins ; Drosophila/genetics/*physiology ; Drosophila Proteins/genetics ; *Energy Intake ; Genotype ; Insulin Receptor Substrate Proteins ; *Intracellular Signaling Peptides and Proteins ; Longevity/*physiology ; Mice ; Mice, Mutant Strains ; Mutation ; Starvation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Delta9-tetrahydrocannabinol increase plasma testosterone concentrations in mice (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-31
    Description: Oral administration of delta 9-tetrahydrocannabinol had a biphasic effect on plasma testosterone concentrations in male mice, causing rapid sustained increases at low doses and subsequent decreases at higher doses. In hypophysectomized and intact mice receiving gonadotropins (human chorionic gonadotropin), treatment with delta 9-tetrahydrocannabinol maintained higher plasma testosterone concentrations. Thus, this cannabinoid may interact with gonadotropin and directly influence testicular steroidogenesis in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Bartke, A -- Mayfield, D -- 1R01 DA 02/DA/NIDA NIH HHS/ -- P 30 HD 10202/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):581-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264607" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/pharmacology ; Dronabinol/*analogs & derivatives/pharmacology ; Hypophysectomy ; Kinetics ; Luteinizing Hormone/*blood ; Male ; Mice ; Testosterone/*blood
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Cannabinoids in male mice: effects on fertility and spermatogenesis (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Badr, F -- Bartke, A -- Mayfield, D -- DA 02342/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Apr 16;216(4543):315-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6801767" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cannabinoids/*pharmacology ; Chromosome Aberrations/*chemically induced ; Chromosome Disorders ; Follicle Stimulating Hormone/blood ; Infertility, Male/*chemically induced/genetics ; Luteinizing Hormone/blood ; Male ; Mice ; Spermatogenesis/*drug effects ; Testosterone/blood
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Perinatal exposure to cannabinoids alters male reproductive function in mice (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-28
    Description: Oral administration of delta 9-tetrahydrocannabinol or cannabinol to female mice late in pregnancy and during early lactation alters body weight regulation and pituitary-gonadal function and suppresses adult copulatory activity in their male offspring. These findings suggest that both psychoactive and nonpsychoactive constituents of marihuana can affect the development of male reproductive functions in mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalterio, S -- Bartke, A -- New York, N.Y. -- Science. 1979 Sep 28;205(4413):1420-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472762" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Body Weight/drug effects ; Cannabinoids/*pharmacology ; Cannabinol/*pharmacology ; Copulation/drug effects ; Dronabinol/*pharmacology ; Male ; Mice ; Organ Size/drug effects ; Pituitary Hormones/blood ; Sex Differentiation/*drug effects ; Sexual Behavior, Animal/*drug effects ; Sexual Maturation/drug effects ; Testis/anatomy & histology ; Testosterone/blood
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Glucose homeostasis and insulin sensitivity in growth hormone-transgenic mice: a cross-sectional analysis (2010)
    De Gruyter
    Details
    Publication Date: 2010-10-01
    Description: In contrast to its stimulatory effects on musculature, bone, and organ development, and its lipolytic effects, growth hormone (GH) opposes insulin effects on glucose metabolism. Chronic GH overexposure is thought to result in insulin insensitivity and decreased blood glucose homeostatic control. Yet, despite the importance of this concept for basic biology, as well as human conditions of GH excess or deficiency, no systematic assessment of the impact of GH over- expression on glucose homeostasis and insulin sensitivity has been conducted. We report that male and female adult GH transgenic mice have enhanced glucose tolerance compared to littermate controls and this effect is not dependent on age or on the particular heterologous GH transgene used. Furthermore, increased glucose-stimulated insulin secretion, augmented insulin sensitivity, and muted gluconeogenesis were also observed in bovine GH overexpressing mice. These results show that markedly increased systemic GH concentration in GH-transgenic mice exerts unexpected beneficial effects on glucose homeostasis, presumably via a compensatory increase in insulin release. The counterintuitive nature of these results challenges previously held presumptions of the physiology of these mice and other states of GH overexpression or suppression. In addition, they pose intriguing queries about the relationships between GH, endocrine control of metabolism, and aging.
    Print ISSN: 1431-6730
    Electronic ISSN: 1437-4315
    Topics: Biology , Chemistry and Pharmacology
    Published by De Gruyter
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  • 7
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    Renal pro-apoptotic proteins are reduced by growth hormone resistance but not by visceral fat removal (2011)
    De Gruyter
    Details
    Publication Date: 2011-05-01
    Description: Growth hormone (GH) receptor knockout (GHRKO) mice are highly insulin sensitive and long-lived. Surgical visceral fat removal (VFR) improves insulin signaling in normal mice and rats and extends longevity in rats. We have previously demonstrated decreased expression of certain pro-apoptotic genes in kidneys of GHRKO mice and suggested that this could contribute to the increased longevity of these animals. The aim of the present study was to examine the level of the following proteins: caspase-3, caspase-9, caspase-8, bax, bad, phospho-bad, bcl-2, Smac/DIABLO, Apaf-1, phospho-p53 (pp53) and cytochrome c in male GHRKO and normal (N) mice subjected to VFR or sham surgery, at approximately six months of age. The kidneys were collected two months after VFR. Caspase-3, caspase-8, bax, bad, Smac/DIABLO, Apaf-1 and pp53 levels were decreased in GHRKO mice as compared to N animals. VFR did not change the level of any of the examined proteins. The decreased renal levels of pro-apoptotic proteins could contribute to the extended life-span caused by targeted disruption of the GH receptor gene but are apparently not involved in mediating the effects of VFR.
    Print ISSN: 1431-6730
    Electronic ISSN: 1437-4315
    Topics: Biology , Chemistry and Pharmacology
    Published by De Gruyter
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