Abstract:
:Heart disease is a leading cause of death in newborns and in adults. Efforts to promote cardiac repair by introduction or recruitment of exogenous stem cells hold promise but typically involve isolation and introduction of autologous or donor progenitor cells. We have found that the G-actin-sequestering peptide thymosin beta4 promotes myocardial and endothelial cell migration in the embryonic heart and retains this property in postnatal cardiomyocytes. Survival of embryonic and postnatal cardiomyocytes in culture was also enhanced by thymosin beta4. We found that thymosin beta4 formed a functional complex with PINCH and integrin-linked kinase (ILK), resulting in activation of the survival kinase Akt/PKB, which was necessary for thymosin beta4's effects on cardiomyocytes. After coronary artery ligation in mice, thymosin beta4 treatment resulted in upregulation of ILK and Akt activity in the heart, enhanced early myocyte survival, and improved cardiac function. These findings suggest that thymosin beta4 promotes cardiomyocyte and endothelial migration, survival, and repair and may be a novel therapeutic target in the setting of acute myocardial damage.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Srivastava D,Saxena A,Michael Dimaio J,Bock-Marquette Idoi
10.1196/annals.1415.048subject
Has Abstractpub_date
2007-09-01 00:00:00pages
161-70eissn
0077-8923issn
1749-6632pii
annals.1415.048journal_volume
1112pub_type
杂志文章abstract::Monitoring of wildlife diseases started in Scandinavia as sporadic postmortem examinations in the early 20th century. In 1945 a monitoring program for wildlife health was initiated. The program is today an integrated part of the National Environmental Monitoring programs in Sweden. The total material today comprises m...
journal_title:Annals of the New York Academy of Sciences
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abstract::Release of the amyloid precursor protein (APP) of Alzheimer's disease from Swiss 3T3 fibroblasts was stimulated in a concentration-dependent manner by phorbol 12-myristate 13-acetate. In fibroblasts overexpressing protein kinase C alpha (PKC alpha), the EC50 for this response was 7 nM, while in control cells the EC50 ...
journal_title:Annals of the New York Academy of Sciences
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abstract::Sensorineural hearing loss results from the degeneration of hair cells and/or auditory neurons in the cochlea of the inner ear. BDNF and NT-3 were shown to support survival of auditory neurons both in vitro and in vivo. Cochlea from P3-P4 rats were cultured as floating explants and hair cells in the organ of Corti wer...
journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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abstract::In a variety of cell types including chinese hamster embryonic fibroblasts (IIC9 cells), alpha-thrombin is a potent mitogen. Thrombin irreversibly activates Par 1, a member of the seven membrane-spanning superfamily of G protein-coupled receptors (GPCRs). This, in turn, activates several heterotrimeric G proteins and ...
journal_title:Annals of the New York Academy of Sciences
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abstract::The concentration of materials and energy within cities is an inevitable consequence of dense populations and their per capita requirements for food, fiber, and fuel. As the world population becomes increasingly urban over the coming decades, urban areas will dramatically affect the distribution of nutrients across th...
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abstract::Acanthamoeba castellanii (A. castellanii) is a common soil- or water-borne protozoon that feeds on bacteria by phagocytosis. A. castellanii can grow between 4 and 32 degrees C and has to adapt quickly to chilling in order to survive. We have identified a Delta12-fatty acid desaturase as key to low temperature adaptati...
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journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:2012-04-01 00:00:00
abstract::Autophagy is a phylogenetically conserved process that plays a critical role in the degradation of oxidatively damaged proteins and organelle turnover. The role of oxidative stress and apoptosis in methamphetamine (METH)-induced neurotoxicity is well known; however, the potential contribution of autophagy to METH-indu...
journal_title:Annals of the New York Academy of Sciences
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abstract::Ovarian failure is heterogeneous, both in cause and in phenotype. Women whose menses cease prior to age 40 years and have menopausal FSH levels are traditionally considered by clinicians to have the diagnosis of "premature ovarian failure" (POF). In fact, however, the ovarian function in this disorder is in reality a ...
journal_title:Annals of the New York Academy of Sciences
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更新日期:2008-01-01 00:00:00