Previous work has shown that the evolution of both insulin-like growth factor 1 (IGF1) and insulin shows an episode of accelerated change on the branch leading to New World Monkeys (NWM). Here the possibility that this is accompanied by a corresponding episode of accelerated evolution of IGF1 receptor (IGF1R), insulin receptor (IR) and/or IGF binding proteins (IGFBPs) was investigated. Analysis...

The renal growth hormone--insulin-like growth factor-I system in acute ischemic renal failure. Recovery from acute tubular necrosis (ATN) is accelerated by IGF-I therapy. Furthermore, the local renal growth hormone-IGF-I system may participate in the natural repair. We examined the IGF-I system in rat kidneys subjected to 60 minute ischemia compared to sham operated controls. Two days after inj...

Pregnancy-associated plasma protein-A (PAPP-A) is a proteolytic enzyme that was discovered to increase local insulin-like growth factor (IGF) availability for receptor activation through cleavage of inhibitory IGF binding proteins (IGFBPs). Reduced IGF signaling has been associated with increased lifespan and healthspan. Therefore, inhibition of PAPP-A represents a novel approach to indirectly ...

baluchi sheep is considered as the most common breed in iran, constituting about 30% of total sheep population, approximately 15 million heads. this research was designed to study the incidence of mutation in two loci of igf-i (exon 3) and adrb3 (intron) along with their association with body weight traits in baluchi sheep population. following dna extraction from 190 baluchi sheep, two pairs o...

PURPOSE The development of drug-resistant phenotypes has been a major obstacle to cisplatin use in non-small-cell lung cancer. We aimed to identify some of the molecular mechanisms that underlie cisplatin resistance using microarray expression analysis. METHODS AND MATERIALS H460 cells were treated with cisplatin. The differences between cisplatin-resistant lung cancer cells and parental H460...

Quercetin is a flavonoid widely studied as a chemopreventive agent in different types of cancer. Previously, we reported that quercetin has a chemopreventive effect on the liver-induced preneoplastic lesions in rats. Here, we evaluated if quercetin was able not only to prevent but also to reverse rat liver preneoplastic lesions. We used the modified resistant hepatocyte model (MRHM) to evaluate...

BACKGROUND An attenuation of the insulin-like growth factor 1 (IGF-1) signaling has been associated with elongation of the lifespan in simple metazoan organisms and in rodents. In humans, IGF-1 level has an age-related modulation with a lower concentration in the elderly, depending on hormonal and genetic factors affecting the IGF-1 receptor gene (IGF-1R). METHODS In an elderly population fro...

background angiogenesis is an important biological process involved in the proliferation of endothelial cells, tumor growth and metastasis. vascular endothelial growth factor (vegf) is considered as a prominent regulator of angiogenesis which exerts the aforementioned effect(s) through its respective receptors (vegfr1 and vegfr2). vegf receptors are targeted as a therapeutic candidate for cance...