Correlation of gut microorganisms and non-volatile flavor substances provides new insights for breeding Scylla paramamosain

The farming of Scylla paramamosain with specific flavors has a higher commercial value,and the flavors are related to the integrated farming environment and non-volatile flavor substances,while the survival environment is one of the important ways to source gut microorganisms in the organism.In this study,the levels of dominant taxa in the gut flora of S.paramamosain from Mong Cai,Vietnam(VN),Taishan City,Guangdong Province(TS)of China,and Ninghai County,Ningbo City(NB)Zhejiang Province of China converged with those of S.paramamosain from Sanmen County,Ningbo City(CK 1,CK 2,and CK 3)at 28 d of domestication.The top 15 genera with the highest abundance of VN,TS,and NB gut flora were the same as CK 1,CK 2,and CK 3,but with different percentages,and gradually converged to CK 1,CK 2,and CK 3,respectively,at 28 d of domestication.Correlation between intestinal flora and non-volatile flavor substances in the hepatopancreas at the percentage level of relative abundance of bacterial genera found that above 28 d of domestication,Muribaculaceae,Psychrilyobacter,Clostridia_vadinBB 60_group,Halarcobacter Carboxylicivirga,Sediminispirochaeta may be the most important genera affecting flavor amino acids of VN.Sediminispirochaeta,Carboxylicivirga,Halarcobacter,Photobacterium,ZOR 0006,Psychrilyobacter,and Pseudomonas may be the most important genera affecting flavor amino acids of NB.Sediminispirochaeta,Carboxylicivirga,Halarcobacter,Photobacterium,ZOR 0006,Vibrio,and Sphingomonas may be the most important genera affecting flavor amino acids of TS.These results show that the intestinal flora structure of crabs from different areas were domesticated in the same area for at least 28 d before they converged to that of the domesticated crab,and the most important genera affecting the flavor amino acids of TS,VN,and NB were also identified.The results of this study provide a reference and basis for the technique of directional cultivation of the flavor quality of the crab.

Acupuncture for treating adolescent depression:Study protocol for a randomized controlled trial

The prevalence of depression among adolescents has been significantly increasing in recent years.However,current antidepressants for adolescents have limited safety and efficacy.Acupuncture has been shown to be effective in treating depression in adults,but there is a lack of high-quality evidence for its effect on the treatment of adolescent depression,and the underlying mechanism is still unclear.Therefore,we designed a randomized controlled trial to explore the effectiveness and the therapeutic mechanisms of acupuncture on adolescent depression.This study will be designed as a multi-center,sham and randomized controlled clinical trial.For this purpose,a total of 96 adolescent depression patients diagnosed with moderate and severe depression will be randomly divided into the manual acupuncture group and the sham one,respectively.The two groups received acupuncture treatment 3 times a week for a total course lasting 4 weeks.All patients will be assessed according to the primary outcomes including Beck Depression Inventory-II(BDI-II),Hamilton Depression Rating Scale(HAMD-24)and Zung self-rating depression scale(SDS)at baseline,week 2,4 and 8.Additionally,the secondary outcomes will be assessed at baseline and week 4,which includes intestinal flora structure,fecal short chain fatty acids(SCFAs)content and serum serotonin(5-HT)level.This study is the first randomized trial of acupuncture treatment of adolescent depression.