Le Tho Son, et al. DHS-21, a decarbonyl/ L-xylulose reductase (DCXR) ortholog, regulates longevity and reproduction in Caenorhabditis elegans. FEBs Letters 585 (2011) 1310-1316. IF=3.5.


Được đăng: Ngày 15 Tháng 01 Năm 2016 13:01 | Viết bởi Hà Văn Huân (Chủ nhiệm Dự án) |

Abstract: Dicarbonyl/L-xylulose reductase (DCXR) converts l-xylulose into xylitol, and reduces various α-dicarbonyl compounds, thus performing a dual role in carbohydrate metabolism and detoxification. In this study, we identified DHS-21 as the only DCXR ortholog in Caenorhabditis elegans. The dhs-21 gene is expressed in various tissues including the intestine, gonadal sheath cells, uterine seam (utse) cells, the spermathecal-uterus (sp-ut) valve and on the plasma membrane of spermatids. Recombinant DHS-21 was shown to convert L-xylulose to xylitol using NADPH as a cofactor. Dhs-21 null mutants of C. elegans show defects in longevity, reproduction and egg-laying. Knock-down of daf-16 and elt-2 transcription factors affected dhs-21 expression. These results suggest that DHS-21 is a bona fide DCXR of C. elegans, essential for normal life span and reproduction.