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    • 6. 发明授权
    • Cardioprotective effects of GHRH agonists
    • GHRH激动剂的心脏保护作用
    • US08507433B1
    • 2013-08-13
    • US12914023
    • 2010-10-28
    • Andrew V. SchallyNorman L BlockJoshua HareRosemeire Miyuki Kanashiro Takeuchi
    • Andrew V. SchallyNorman L BlockJoshua HareRosemeire Miyuki Kanashiro Takeuchi
    • A61K38/25C07K14/60A61P9/10
    • A61K38/25C07K14/60
    • Whether the growth hormone (GH)/Insulin-like growth factor 1(IGF-I) axis exerts cardioprotective effects remains controversial; and the underlying mechanism(s) for such actions are unclear. Here we tested the hypothesis that growth-hormone releasing hormone (GHRH) directly activates cellular reparative mechanisms within the injured heart, in a GH/IGF-I independent fashion. Following experimental myocardial infarction (MI), rats were randomly assigned to receive, during a 4 week period, either placebo (n=14), rat recombinant GH (rrGH, n=8) or JI-38 (n=8; 50 μg/Kg/day), a potent GHRH-agonist. JI-38 did not elevate serum levels of GH or IGF-I, but markedly attenuated the degree of cardiac functional decline and remodeling after injury. In contrast, GH administration markedly elevated body weight, heart weight, circulating GH and IGF-I, but did not offset the decline in cardiac structure and function. Whereas, both JI-38 and GH augmented levels of cardiac precursor cell proliferation, only JI-38 increased anti-apoptotic gene expression. The receptor for GHRH was detectable on myocytes supporting direct activation of cardiac signal transduction. Collectively, these findings demonstrate that within the heart GHRH-agonists can activate cardiac repair following MI, suggesting the existence of a potential signaling pathway based on GHRH in the heart. The phenotypic profile of the response to a potent GHRH agonist has therapeutic implications.
    • 生长激素(GH)/胰岛素样生长因子1(IGF-I)轴是否发挥心脏保护作用仍然是有争议的; 而这些行动的基本机制尚不清楚。 在这里,我们测试了生长激素释放激素(GHRH)以GH / IGF-I独立的方式直接激活受伤心脏内的细胞修复机制的假说。 在实验心肌梗死(MI)后,随机分配大鼠,在4周期间接受安慰剂(n = 14),大鼠重组GH(rrGH,n = 8)或JI-38(n = 8; 50杯) / Kg /天),一种有效的GHRH激动剂。 JI-38没有升高GH或IGF-I的血清水平,但显着减弱了心脏功能下降和损伤后重塑的程度。 相比之下,GH治疗体重显着升高,心脏重量,循环GH和IGF-I,但并没有抵消心脏结构和功能的下降。 而JI-38和GH两者均增加心脏前体细胞增殖水平,仅JI-38增加抗凋亡基因表达。 在支持心脏信号转导的直接激活的心肌细胞上检测到GHRH受体。 总而言之,这些研究结果表明,在心脏内GHRH激动剂可以激活MI后的心脏修复,这表明存在基于心脏GHRH的潜在信号通路。 对有效GHRH激动剂的反应的表型谱具有治疗意义。
    • 7. 发明申请
    • Identification of a gene expression profile that differentiates ischemic and nonischemic cardiomyopathy
    • 鉴定区分缺血性和非缺血性心肌病的基因表达谱
    • US20050158756A1
    • 2005-07-21
    • US11012778
    • 2004-12-15
    • Joshua HareMichelle Kittleson
    • Joshua HareMichelle Kittleson
    • C12Q1/68G01N33/48G01N33/50G06F19/00
    • C12Q1/6883C12Q2600/158G01N2800/325
    • A method of preparing a gene expression prediction profile for distinguishing ischemic and nonischemic cardiomyopathy comprises the steps of obtaining clinical specimens from patients suffering from ischemic or nonischemic cardiomyopathy, isolating nucleic acid sequences from at least a plurality of said specimens, obtaining a gene expression level corresponding to each individual of said nucleic acid sequence by a gene expression profiling method, identifying genes having differences in gene expression by comparing the gene expression level of an ischemic specimen with the gene expression level of a nonischemic specimen, and identifying a gene expression prediction profile comprises genes identified as having differences in gene expression so that said prediction profile distinguishes ischemic and nonischemic cardiomyopathy.
    • 制备用于区分缺血性和非缺血性心肌病的基因表达预测曲线的方法包括以下步骤:从患有缺血性或非缺血性心肌病的患者获得临床标本,从至少多个所述标本分离核酸序列,获得相应的基因表达水平 通过基因表达谱分析方法对所述核酸序列的每个个体进行鉴定,通过比较缺血标本的基因表达水平与非缺血标本的基因表达水平来鉴定基因表达差异的基因,以及鉴定基因表达预测谱包括 鉴定为具有基因表达差异的基因,使得所述预测特征区分缺血性和非缺血性心肌病。