Oxidative stress biomarkers as potential tools in reef degradation monitoring: A study case in a South Atlantic reef under influence of the 2015-2016 El Nino/Southern Oscillation (ENSO)
ECOLOGICAL INDICATORS
Authors: de Barros Marangoni, Laura Fernandes; Dalmolin, Camila; Marques, Joseane Aparecida; Klein, Roberta Daniele; Abrantes, Douglas Pinto; Pereira, Cristiano Macedo; Calderon, Emiliano Nicolas; Barreira e Castro, Clovis; Bianchini, Adalto
Abstract
The third global-scale coral bleaching event, triggered by the 2015-2016 El Nino, presented unprecedented levels of thermal stress and bleaching occurrence. Identification of potential cellular biomarkers in key reef species can greatly improve coral reef resource manager's ability to make ecological forecasts and develop efficient mitigation strategies. In this context, the present study evaluated ecologically relevant biochemical parameters involved in thermal-stress response in two important reef building species of southwestern Atlantic Reefs - the scleractinian coral Mussismilia harttii and the hydrocoral Millepora alcicornis - aiming to assess their potential to forecast bleaching occurrence in corals/hydrocorals. Bleaching frequency, lipid peroxidation (LPO) and total antioxidant capacity (TAC), as well as thermal stress parameters (Degree Heating Weeks, DHW), were monitored during a six-month period in a reef area under influence of the 2015-2016 El Nino event. LPO is suggested as an informative, cost-effective and logical complement to reef monitoring programs; and TAC basal level as a potential measurement for predicting corals/hydrocorals susceptibility to bleaching. Further, results indicate M. alcicornis as a promising bioindicator in South Atlantic reefs. Findings presented here are expected to improve South Atlantic coral reef monitoring programs, as well as to contribute with potential biomarker-monitoring techniques to be used as additional tools in traditional reef monitoring programs worldwide. Further, observations on oxidative stress responses of a hydrocoral undergoing thermal stress conditions in the field are reported here for the first time.
Juice from Fructus Rosae Roxburghii normalizes blood lipids in mice with diet-induced hyperlipidemia
FOOD SCIENCE & NUTRITION
Authors: Song, Pingping; Shen, Xiangchun
Abstract
Fructus Rosae Roxburghii(FRR) as a dietary supplement is considered to possess anti-atherosclerosis (AS), and hyperlipidemia (HLP) is material basis for AS formation, so the effects and molecular mechanism of FRR on diet-induced hyperlipidemic mice were explored. In Diet IV2 group, hepatic steatosis was significantly relieved; meanwhile, TC, TG, LDL-C, HDL-C, and ASI in serum were regulated to control level. Thirty-seven DCEG in Diet I, Diet II, and Diet IV2 groups were obtained by RNA-seq analysis. Relative mRNA levels were further determined by qRT-PCR, of which 28 genes were matched with those detected by RNA-seq. Ten DCEP were verified by targeted quantitative proteomic analysis, but expressive patterns of only six proteins were correlated with qRT-PCR data. These DCEG and DCEP played important roles in regulating the biosynthesis of BAs and steroids, fatty acid metabolism, and LPO production. They might cooperatively regulate the function of HDL or RCT by PPAR signaling pathway under the FRR action. As we know, it is the first time the potential anti-atherosclerotic mechanism of FRR regulating the blood lipids was explored.