Genetic polymorphisms in leptin, adiponectin and their receptors affect risk and aggressiveness of prostate cancer: evidence from a meta-analysis and pooled-review
ONCOTARGET
Authors: Hu, Meng-Bo; Xu, Hua; Hu, Ji-Meng; Zhu, Wen-Hui; Yang, Tian; Jiang, Hao-Wen; Ding, Qiang
Abstract
Leptin and adiponectin signaling was associated with development and progression of various cancers. The present study aimed to clarify the role of genetic variants in leptin, adiponectin and their receptors in prostate cancer. After comprehensive search and manuscript scanning, a total of 49 genetic variants were enrolled and examined for their relations to cancer risk and aggressiveness. In the meta-analysis, LEP rs7799039 (allele contrast: OR 1.133, 95% CI 1.024-1.254), ADIPOQ rs2241766 (allele contrast: OR 1.201, 95% CI 1.015-1.422) and ADIPOR1 rs10920531 (allele contrast: OR 1.184, 95% CI 1.075-1.305) variants were identified to be correlated with increased risk of prostate cancer. On the contrary, LEPR rs1137101 (allele contrast: OR 0.843, 95% CI 0.730-0.973) and ADIPOR1 rs2232853 (allele contrast: OR 0.638, 95% CI 0.535-0.760) variants were associated with decreased risk of prostate cancer. From the pooled-review, we additionally recognized eight variants associated with cancer risk and another eight variants associated with cancer aggressiveness, respectively. These observations indicated important roles of leptin, adiponectin and their receptors in the development and progression of prostate cancer. The identified polymorphisms might assist in developing better risk-assessment tools, as well as generating novel targeted therapies, especially for obese cancer patients with impaired leptin and adiponectin signaling.
Genes associatedwith diabetes: potential for novel therapeutic targets?
EXPERT OPINION ON THERAPEUTIC TARGETS
Authors: Hara, Kazuo; Kadowaki, Takashi; Odawara, Masato
Abstract
Introduction: Type 2 diabetes (T2D) is a complex disease caused by an interaction between multiple genetic and environmental factors. T2D-associated loci identified by genome-wide association studies (GWAS) harbor the genes targeted by many clinically available drugs, supporting the idea that GWAS have the potential to discover novel genes for drug development.Areas covered: This paper outlines, among the genes at those T2D-associated loci, the functional analysis of FTO, TCF7L2, SLC30A8, and MTNR1B, illustrating caveats we should be cautious about. This paper also reviews the current status of the compounds targeting the T2D-associated genes GCK, GKRP, ADIPOQ, and ADRA2A in clinical and preclinical phases.Expert opinion: Functional analysis of those loci has fallen too far behind identification of T2D-associated loci. It is mandatory to define the true causal gene at the T2D-associated loci by using a variety of experimental techniques. The biggest challenge lies in the limited access to human tissues relevant to the pathogenesis of T2D. The ultimate goal of human genetic study is enabling personalized medicine based on the genetic information of individuals. More research will be needed to achieve this goal.