Abstract:
:Interruption of insulin-like growth factor I (IGF-1) signaling has been demonstrated to prolong life span although the underlying mechanism has not been elucidated. The aim of this study was to examine the influence of severe IGF-1 deficiency on survival rate, cardiomyocyte viability, contractile function, and intracellular Ca(2+) property in response to challenge with the pro-oxidant paraquat. C57 negative and liver IGF-1 deficient (LID) transgenic mice were administrated paraquat (75 mg/kg) and survival was monitored. LID mice displayed a significantly improved survival than did C57 mice evaluated by the Kaplan-Meier curve. MTT assay revealed that in vitro IGF-1 treatment significantly sensitized paraquat-induced cell death in both C57 and LID groups, with significantly better cell viability in LID cardiomyocytes. Compared to C57 mouse cardiomyocytes, LID myocytes displayed reduced peak shortening (PS), decreased maximal velocity of shortening/relengthening (+/- dL/dt), prolonged time-to-90% relengthening (TR(90)), and comparable tolerance to high stimulus frequency and intracellular Ca(2+) homeostasis. Paraquat treatment for 48 hours reduced PS, +/- dL/dt, tolerance to high stimulus frequency, resting and rise in intracellular Ca(2+), and prolonged TR(90), all of which were nullified or masked by IGF-1 deficiency. Paraquat increased reactive oxygen species and carbonyl production upregulated the Ca(2+) regulating protein SERCA2a, and downregulated Na(+) -Ca(2+) exchanger, the effects of which were nullified or masked by IGF-1 deficiency. Although LID mice displayed reduced whole body glucose clearance, cardiomyocytes from LID mice exhibited dramatically enhanced insulin-stimulated phosphorylation of insulin receptor and Akt. These data demonstrated that IGF-1 deficiency may antagonize or mask the paraquat-induced decrease in survival, cardiomyocyte dysfunction, oxidative stress, and change in Ca(2+) regulating proteins.
journal_name
Rejuvenation Resjournal_title
Rejuvenation researchauthors
Li Q,Yang X,Sreejayan N,Ren Jdoi
10.1089/rej.2007.0552subject
Has Abstractpub_date
2007-12-01 00:00:00pages
501-12issue
4eissn
1549-1684issn
1557-8577journal_volume
10pub_type
杂志文章abstract::Previously, other groups and our team consistently have demonstrated that the possible origination of liver cancer stem cells (LCSCs) is the malignant transformation from liver normal stem cells (LNSCs). However, this complex and multi-step process is far from clear due to the accumulation of various gene dysregulatio...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2014.1642
更新日期:2015-08-01 00:00:00
abstract::Pulses up to 11 Tesla magnetic fields may generate pockets of currents along the walls of cellular material and may interfere with the overall ability of cell division. We used prokaryotic cells (Escherichia coli) and eukaryotic cells (murine fibroblasts) and exposed them to magnetic pulses of intensities ranging from...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2013.1487
更新日期:2014-04-01 00:00:00
abstract::The relationships among lipoprotein metabolism, genetic vascular factors, vascular disease, and Alzheimer's disease suggest that the examination of centenarian populations in relation to certain genes or lipoprotein metabolism provide insights into human longevity. The findings on the higher frequency of the apolipopr...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2007.0537
更新日期:2007-12-01 00:00:00
abstract::To investigate whether Vigconic 28 (VI-28), a Yang-invigorating Chinese herbal formula, could affect survival of aging animals, male and female C57BL/6J mice were given a VI-28-supplemented diet (0.05 and 0.5%, wt/wt) starting at 36 weeks of age, until death. VI-28 dietary supplementation at 0.05% significantly increa...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2009.0893
更新日期:2010-04-01 00:00:00
abstract::Aging is associated with protein damage and imbalance in redox status in a variety of cells and tissues, yet little is known about the extent of age-related oxidative stress in the peripheral nervous system. Previously, we showed a drastic decline in the expression of glial and neuronal proteins in myelinated peripher...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2009.0892
更新日期:2010-02-01 00:00:00
abstract::The pineal hormone melatonin plays a major role in circadian sleep-wake rhythm in many mammals, including humans. Patients with acute confusional state or delirium, especially those with underlying cognitive impairment, frequently suffer from sleep disturbances and disturbed circadian rhythm. In this review, an overvi...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2012.1405
更新日期:2013-08-01 00:00:00
abstract::Osteoporosis is a silent disease caused by low bone mineral density and is complicated by fractures. This study was designed to examine the differentiation of uterine stem cell-derived osteoprogenitor cells (UOPCs) both in vitro and in vivo, assessing their effectiveness in treating osteoporosis. CD271+/CD45- UOPCs we...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2019.2262
更新日期:2020-11-03 00:00:00
abstract::The senescence of the immune system contributes considerably to the age-related diseases that are the main causes of death after the age of 65. In this study, we present an appealing option for the prevention of immune senescence and slowing or reversing the aging process, which can be achieved by heterochronous autol...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2018.2164
更新日期:2020-04-01 00:00:00
abstract::Can memory be retained after cryopreservation? Our research has attempted to answer this long-standing question by using the nematode worm Caenorhabditis elegans, a well-known model organism for biological research that has generated revolutionary findings but has not been tested for memory retention after cryopreserv...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2014.1636
更新日期:2015-10-01 00:00:00
abstract::The aim of the current study was to develop fitness standards associated with maintaining physical capacity in older adults at two different levels-that needed for advanced functioning and that needed for maintaining moderate (independent) functional ability. This was a cross-sectional study of 406 Chilean adults aged...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2016.1913
更新日期:2017-12-01 00:00:00
abstract::Down syndrome (DS), the most common chromosomal abnormality in humans, is characterized by precocious immunologic aging that results, among other things, in alterations of B and T lymphocyte subsets and natural killer cells, defective phagocytosis, and chemotaxis of polymorphonuclear leukocytes. We studied 30 children...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2007.0648
更新日期:2008-06-01 00:00:00
abstract::This study aimed at comparing the effects of three chair-based exercise programs on people older than 80 years. Thirty-six participants (87.91 ± 4.70 years) were randomly allocated to an aerobic, muscular resistance, or joint mobility exercise program. The participants exercised 3 days per week during 3 months. A hand...
journal_title:Rejuvenation research
pub_type: 杂志文章,随机对照试验
doi:10.1089/rej.2017.1924
更新日期:2017-10-01 00:00:00
abstract::The release of mitochondrial cytochrome c followed by activation of caspase cascade has been reported with aging in various tissues, whereas little is known about the caspase-independent pathway involved in mitochondrial dysfunction. To determine the functional impact of cytochrome c loss on mitochondrial respiratory ...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2007.0541
更新日期:2007-09-01 00:00:00
abstract::Inflammation and oxidative stress (OS) are key points in age progression. Both processes impact negatively in cognition and in brain functions. Resveratrol (RV) has been postulated as a potent antioxidant natural compound, with rejuvenating properties. Inducing a metabolic stress by high-fat (HF) diet in aged C56/BL6 ...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2016.1885
更新日期:2017-06-01 00:00:00
abstract::A hypothetical mechanism of 14C-generated influence on a person's rate of aging is offered. The mathematical description and the following approbation of the radiocarbon mechanism of aging made it possible to coordinate the Gompertz and Strehler-Mildvan laws and predict the existence of one more, till-now unknown, int...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2006.9.309
更新日期:2006-07-01 00:00:00
abstract::Maillard reactions are an unavoidable feature of life that appear to be damaging to cell and organisms. Consequently, all living systems must have ways to protect themselves against this process. As of 2012, several such defense mechanisms have been identified. They are all enzymatic and were found in mesophilic organ...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2012.1401
更新日期:2013-08-01 00:00:00
abstract::We developed a new model for initiating, coordinating, funding, and managing biomedical research projects. The concept involves engaging the patients with chronic conditions with no known cures into goal-oriented research activities. In this model, the patient seeks the help of a research organization to bring togethe...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2013.1471
更新日期:2013-10-01 00:00:00
abstract::Intermittent fasting (IF) is an intervention that can be beneficial for health span and mitigate the risk of developing age-related cardiovascular diseases; however, the involved mechanisms are not well understood. The present study investigated the effects of IF regimens on the plasma level of angiotensin II (Ang II)...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2019.2254
更新日期:2020-08-01 00:00:00
abstract:OBJECTIVE:This study examined the impact of estrogen replacement therapy with spirometry on pulmonary function in surgically castrated (salpingo-oophorectomy) postmenopausal women with genital prolapse. METHODS:The study included 60 postmenopausal women with pelvic organ prolapse. The study received institutional Ethi...
journal_title:Rejuvenation research
pub_type: 杂志文章,随机对照试验
doi:10.1089/rej.2012.1337
更新日期:2012-12-01 00:00:00
abstract::I propose a new model, called the "RNA memory" model, for the possible role of RNAs in the maintenance and establishment of cell identity. This is cytoplasmic memory obtained by the transmission of mother noncoding (nc) RNAs to daughter cells. These RNAs are able to activate transcription via sequence homology in daug...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2009.0957
更新日期:2010-04-01 00:00:00
abstract::Treadmills are often used as rehabilitation devices to improve gait in Parkinson's disease (PD). Kinematic differences between treadmill and overground gait have been reported. However, electromyographic (EMG) patterns during treadmill and overground walking have not been systematically compared. The aim of this study...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2018.2084
更新日期:2019-02-01 00:00:00
abstract::Decades of studies of candidate genes show their complex role in aging-related traits. We focus on apolipoprotein E e2/3/4 polymorphism and ages at onset of cardiovascular diseases (CVD) and cancer in the parental and offspring generations of the Framingham Heart Study participants to gain insights on the role of age ...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2012.1362
更新日期:2013-02-01 00:00:00
abstract::We have reported the isolation of a unique subpopulation of human stromal cells from bone marrow termed marrow-isolated adult multilineage inducible (MIAMI) cells. The expression of embryonic stem cell markers SSEA-4, Oct-4, Rex-1, and telomerase reverse transcriptase indicates the developmentally immature status of t...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2006.9.10
更新日期:2006-04-01 00:00:00
abstract::Baicalein is a flavonoid isolated from the roots of Scutellaria baicalensis Georgi. This study aimed to ascertain the effects and potential underlying mechanisms of baicalein in d-galactose (d-gal)-induced aging rat model by integration of behavior examination, biochemical detection, and 1H nuclear magnetic resonance ...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2017.1919
更新日期:2017-12-01 00:00:00
abstract::The vicious cycle theory postulates that typical mitochondrial DNA (mtDNA) mutations cause their host mitochondria to generate more superoxide and other reactive oxygen species (ROS) than do normal mitochondria, thereby promoting the occurrence of additional mtDNA mutations at an ever-accelerating rate. However, nearl...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2005.8.13
更新日期:2005-04-01 00:00:00
abstract::This review discusses the role of estrogens as pro- or antiinflammatory players in immune-inflammatory responses. In particular, their role in Alzheimer's disease (AD), an example of immune-inflammatory disease, is discussed briefly. AD is a progressive neurodegenerative disease, which in Western societies accounts fo...
journal_title:Rejuvenation research
pub_type: 杂志文章,评审
doi:10.1089/rej.2009.0942
更新日期:2010-04-01 00:00:00
abstract:BACKGROUND:Curcumin, an extract from the rhizome of the plant Curcuma longa (turmeric), has been widely used as a spice and herbal medicine in Asia. It has been suggested to have many biological activities, such as antioxidative, antiinflammatory, anticancer, chemopreventive, and antineurodegenerative properties. We ev...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2010.1031
更新日期:2010-10-01 00:00:00
abstract::Telomeres are specialized DNA structures located at the ends of chromosomes. Their length is reduced at each cell cycle, especially when the cumulative burden of oxidative stress is high. The purpose of this study was to determine the associations between telomere length and clinical and biological risk factors in isc...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2011.1243
更新日期:2012-06-01 00:00:00
abstract::Neurodegenerative diseases are often associated with both normal and premature aging. Resumption of the cell cycle by neurons induced by DNA damage may lead to their apoptosis, which contributes to the degeneration of neuronal tissue. Cell cycle and DNA replication proteins are frequently found in patients with neurod...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2015.1717
更新日期:2016-04-01 00:00:00
abstract:BACKGROUND:Human growth hormone-1 (GH-1), somatotropin, is a peptide hormone that stimulates cell division in tissues such as bone and cartilage. METHODS:To compare physiological activities in lipid-free and lipid-bound states, we expressed and incorporated GH-1 in reconstituted high-density lipoprotein (rHDL). RESUL...
journal_title:Rejuvenation research
pub_type: 杂志文章
doi:10.1089/rej.2014.1644
更新日期:2015-06-01 00:00:00