
Insulin-like growth factor-binding protein - Wikipedia
IGF binding proteins (IGFBPs) are proteins of 24 to 45 kDa. All six IGFBPs share 50% homology with each other and have binding affinities for IGF-I and IGF-II at the same order of magnitude as the ligands have for the IGF-IR. [3] The IGFBPs help to lengthen the half-life of circulating IGFs in all tissues, including the prostate. [4] .
IGFBP7:免疫治疗新靶点 - 知乎 - 知乎专栏
胰岛素样生长因子结合蛋白7 (IGFBP7)是 胰岛素超家族 的生长促进肽成员,可与胰岛素和IGF结合,调控细胞生长和分化。 IGFBP7在不同的肿瘤类型中表现出抑制或促进肿瘤生长的“自相矛盾”活性。 研究发现IGFBP7可增强治疗性 单克隆抗体 的抗肿瘤作用,并在某些癌症血清中含量高,正在成为多种疾病诊断的 生物标志物。 IGFBP7的生理学和病理学意义. IGFBP7在多种组织中表达,包括大脑、肝脏、胰腺和骨骼肌。 IGFBP7通过调节组织中IGF的生物利用度和其受 …
胰岛素样生长因子结合蛋白IGFBP-3 - 知乎 - 知乎专栏
IGF系统主要由两个IGF(IGF-1 、 IGF-2)、两个IGF受体(IGF-R1 、 IGF-R2)和七个IGF结合蛋白(IGFBPs)组成。 IGFBPs对IGF具有很高的亲和力。 IGFBP-3是出生后血液中含量最丰富的一种IGF结合蛋白。 它与IGF结合,防止它们被降解,促进IGF在身体各部分的运输,对IGFs结构进行修饰从而改变IGFs与其特异性受体之间的相互作用。 由于血清IGFBP-3具有生长激素(GH)依赖性,并与GH分泌量相关,因此其测定有助于GH异常分泌的检测。 尤其是在儿童时 …
IGFBP:病理性疾病和癌症生物标志物 - 知乎 - 知乎专栏
胰岛素样生长因子 1(IGF-1)和IGF-2是胰岛素超家族的生长促进肽成员,与胰岛素共享一个复杂的异构体受体和相关信号分子系统,包括1型IGF受体(IGF1R)、胰岛素受体异构体及其各种混合体。 IGF与胰岛素的区别在于它们在循环和细胞环境中与六种高亲和力的IGF结合蛋白(IGFBPs)相互作用。 IGFBPs属于分泌蛋白,是IGFs的运输蛋白,具有高亲和力,调节IGFs的生物利用率和功能。 IGFBP家族由六个IGFBPs组成,即IGFBP1至IGFBP6。 循环的IGFBPs …
胰岛素样生长因子 - 百度百科
胰岛素样生长因子(insulin like growth factor,IGF)是一组具有促生长作用的多肽类物质,其分泌细胞广泛分布在人体肝、肾、肺、心、脑和肠等组织中。 IGF族有IGF-Ⅰ和IGF-Ⅱ两种。 IGF-Ⅰ的产生更依赖于GH,其促生长作用强,是儿童期的重要生长因子。 各组织中合成的IGF-Ⅰ多以自分泌或旁分泌方式发挥其促生长的作用,而肝脏所合成的IGFⅠ则进入血循环,以内分泌方式作用于靶细胞。 体内IGF-Ⅰ水平受GH的调控,IGF-Ⅰ对GH的分泌亦具有负反馈调节作用,IGF-Ⅱ …
Insulin-Like Growth Factor Binding Protein-3 (IGFBP-3 ... - PubMed
2020年5月5日 · Insulin-like growth factor (IGF) binding protein-3 (IGFBP-3), one of the six members of the IGFBP family, is a key protein in the IGF pathway. IGFBP-3 can function in an IGF-dependent as well as in an IGF-independent manner.
The insulin-like growth factor-binding protein (IGFBP) superfamily
Over the last decade, the concept of an IGFBP family has been well accepted, based on structural similarities and on functional abilities to bind IGFs with high affinities. The existence of other potential IGFBPs was left open. The discovery of proteins with N …
Insulin-Like Growth Factor Binding Proteins in Autoimmune Diseases
2018年8月29日 · Insulin-like growth factor binding proteins (IGFBPs) are a family of proteins binding to Insulin-like growth factors (IGFs), generally including IGFBP1, IGFBP2, IGFBP3, IGFBP4, IGFBP5, and IGFBP6. The biological functions of IGFBPs can be classified as IGFs-dependent actions and IGFs-independent effects.
IGF-Binding Proteins: Why Do They Exist and Why Are There So …
2018年4月8日 · Insulin-like growth factors (IGFs) are key growth-promoting peptides that act as both endocrine hormones and autocrine/paracrine growth factors. In the bloodstream and in local tissues, most IGF molecules are bound by one of the members of the IGF-binding protein (IGFBP) family, of which six distinct types exist.
Signaling Pathways of the Insulin-like Growth Factor Binding …
Insulin-like growth factor binding proteins (IGFBPs) are a family of 6 homologous proteins that bind IGF-1 and IGF-2 with high affinity. IGF-1 and IGF-2 signaling through their principal receptor, IGF1R, is regulated by IGFBPs in both stimulatory and inhibitory ways.