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Over-expression of heat shock protein 70 in mice is associated with growth retardation, tumor formation, and early death

(2008) REJUVENATION RESEARCH. 11(6). p.1013-1020
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Abstract
Experiments in lower organisms, such as worms and flies, indicate that the molecular chaperone protein heat shock protein 70 (HSP70) is a longevity factor. In contrast, we demonstrate here that mice overexpressing HSP70 display growth retardation and early death. HSP70 transgenic mice displayed increased levels of serum corticosterone and weaker expression and activity of the glucocorticoid receptor in the liver. Serum insulin-like growth factor-1 (IGF-1) concentrations in the transgenic mice were 50% lower than in the control mice, leading to growth retardation. HSP70 transgenic mice showed decreased expression of Casp9, which encodes caspase-9, and increased expression of the anti-apoptotic Bcl-2 gene, indicating that apoptosis is suppressed. Consequently, most of the transgenic animals died before the age of 18 months from tumors in their lungs and lymph nodes. We suggest that the proinflammatory and antiapoptotic effects of HSP70 might be responsible for the growth retardation, tumor formation, mid early death observed in the HSP70 transgenic mice.
Keywords
HEAT-SHOCK-PROTEIN, GLUCOCORTICOID-RECEPTOR, INHIBITS APOPTOSIS, DROSOPHILA-MELANOGASTER, CEREBRAL-ISCHEMIA, APAF-1 APOPTOSOME, TRANSGENIC MICE, NECROSIS-FACTOR, LUNG-CANCER, FACTOR-I

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Chicago
Vanhooren, Valerie, Xue-En Liu, Liesbeth Desmyter, Ye-Dong Fan, Lieve Vanwalleghem, Wim Van Molle, Sylviane Dewaele, et al. 2008. “Over-expression of Heat Shock Protein 70 in Mice Is Associated with Growth Retardation, Tumor Formation, and Early Death.” Rejuvenation Research 11 (6): 1013–1020.
APA
Vanhooren, V., Liu, X.-E., Desmyter, L., Fan, Y.-D., Vanwalleghem, L., Van Molle, W., Dewaele, S., et al. (2008). Over-expression of heat shock protein 70 in mice is associated with growth retardation, tumor formation, and early death. REJUVENATION RESEARCH, 11(6), 1013–1020.
Vancouver
1.
Vanhooren V, Liu X-E, Desmyter L, Fan Y-D, Vanwalleghem L, Van Molle W, et al. Over-expression of heat shock protein 70 in mice is associated with growth retardation, tumor formation, and early death. REJUVENATION RESEARCH. 2008;11(6):1013–20.
MLA
Vanhooren, Valerie, Xue-En Liu, Liesbeth Desmyter, et al. “Over-expression of Heat Shock Protein 70 in Mice Is Associated with Growth Retardation, Tumor Formation, and Early Death.” REJUVENATION RESEARCH 11.6 (2008): 1013–1020. Print.
@article{526088,
  abstract     = {Experiments in lower organisms, such as worms and flies, indicate that the molecular chaperone protein heat shock protein 70 (HSP70) is a longevity factor. In contrast, we demonstrate here that mice overexpressing HSP70 display growth retardation and early death. HSP70 transgenic mice displayed increased levels of serum corticosterone and weaker expression and activity of the glucocorticoid receptor in the liver. Serum insulin-like growth factor-1 (IGF-1) concentrations in the transgenic mice were 50\% lower than in the control mice, leading to growth retardation. HSP70 transgenic mice showed decreased expression of Casp9, which encodes caspase-9, and increased expression of the anti-apoptotic Bcl-2 gene, indicating that apoptosis is suppressed. Consequently, most of the transgenic animals died before the age of 18 months from tumors in their lungs and lymph nodes. We suggest that the proinflammatory and antiapoptotic effects of HSP70 might be responsible for the growth retardation, tumor formation, mid early death observed in the HSP70 transgenic mice.},
  author       = {Vanhooren, Valerie and Liu, Xue-En and Desmyter, Liesbeth and Fan, Ye-Dong and Vanwalleghem, Lieve and Van Molle, Wim and Dewaele, Sylviane and Praet, Marleen and Contreras, Roland and Libert, Claude and Chen, Cuiying},
  issn         = {1549-1684},
  journal      = {REJUVENATION RESEARCH},
  language     = {eng},
  number       = {6},
  pages        = {1013--1020},
  title        = {Over-expression of heat shock protein 70 in mice is associated with growth retardation, tumor formation, and early death},
  url          = {http://dx.doi.org/10.1089/rej.2008.0783},
  volume       = {11},
  year         = {2008},
}

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