Objective: In kidney diseases, uncontrolled blood pressure, inflammation, oxidative stress, imbalanced immunity response, metabolic dysfunction were associated with the progressive deterioration of renal function. Sho...Objective: In kidney diseases, uncontrolled blood pressure, inflammation, oxidative stress, imbalanced immunity response, metabolic dysfunction were associated with the progressive deterioration of renal function. Short-chain fatty acids (SCFAs), as a group of metabolites fermented by gut microbiota exerted regulatory effects on kidney diseases through their activation of transmembrane G protein-coupled receptors and their inhibition of histone acetylation. In this review article, we updated recent research advances that provided an opportunity to explore our understanding in physiology and function of SCFAs in kidney disease. Data sources: We performed a comprehensive search in both PubMed and Embase using short-chain fatty acids55 and "kidney" with no restrictions on publication date. Study selection: After reading through the title and abstract for early screening, the full text of relevant studies was identified and reviewed to summarize the roles of SCFAs in kidney diseases. Results: Though controversial, growing evidence suggested SCFAs appeared to have a complex but yet poorly understood communications with cellular and molecular processes that affected kidney function and responses to injury. From recent studies, SCFAs influenced multiple aspects of renal physiology including inflammation and immunity, fibrosis, blood pressure, and energy metabolism. Conclusions: The roles of intestinal SCFAs in kidney diseases were exciting regions in recent years;however, clinical trials and animal experiments in kidney diseases were still lacked. Thus, more research would be needed to obtain better understanding of SCFAs' potential effects in kidney diseases.展开更多
Parkinson’s disease(PD)is a complicated neurodegenerative disease,characterized by the accumulation ofα-synuclein(α-syn)in Lewy bodies and neurites,and massive loss of midbrain dopamine neurons.Increasing evidence ...Parkinson’s disease(PD)is a complicated neurodegenerative disease,characterized by the accumulation ofα-synuclein(α-syn)in Lewy bodies and neurites,and massive loss of midbrain dopamine neurons.Increasing evidence suggests that gut microbiota and microbial metabolites are involved in the development of PD.Among these,short-chain fatty acids(SCFAs),the most abundant microbial metabolites,have been proven to play a key role in brain-gut communication.In this review,we analyze the role of SCFAs in the pathology of PD from multiple dimensions and summarize the alterations of SCFAs in PD patients as well as their correlation with motor and non-motor symptoms.Future research should focus on further elucidating the role of SCFAs in neuroinflammation,as well as developing novel strategies employing SCFAs and their derivatives to treat PD.展开更多
The objective of this work was to investigate the possibility of taper angle correction in cutting of complex micro-mechanical contours using a TruMicro ultra-short pulse laser in combination with the SCANLAB precSYS ...The objective of this work was to investigate the possibility of taper angle correction in cutting of complex micro-mechanical contours using a TruMicro ultra-short pulse laser in combination with the SCANLAB precSYS micro machining sub system. In a first step, the influence of the process parameters on the kerftaper angle of metallic alloys was systematically investigated without beam inclination. A set of base parameters was derived for the subsequent investigations. In a second step, the kerftaper angle was controlled by static beam inclination. In a third step, the same optics was used in its dynamic precession mode to fabricate micro-mechanical components of complex contours with perpendicular 0~ taper angles. It was found that taper angle adjustments of up to 7.5~ are possible with the used setup for cutting applications. Taper angle control is possible both in the static beam inclination mode and in the dynamic precession mode. The static mode could be interesting for contours with sharp inner radii and for achieving faster cutting times similar to results with fixed optics, but would require excellent synchronization of beam inclination and axis motion. The dynamic precession mode would allow an easier integration of the optics into a laser machine but will result in longer cutting times and limitations with respect to achievable inner radii.展开更多
Short chain fatty acids(SCFA)exist in dietary foods and are produced by the fermentation of gut microbiota,and are considered an important element for regulating host health.Through blood circulation,SCFA produced in ...Short chain fatty acids(SCFA)exist in dietary foods and are produced by the fermentation of gut microbiota,and are considered an important element for regulating host health.Through blood circulation,SCFA produced in the gut and obtained from foods have an impact on the intestinal health as well as vital organs of the host.It has been recognized that the gut is the“vital organ”in the host.As the gut microbial metabolites,SCFA could create an“axis”connecting the gut and to other organs.Therefore,the“gut-organ axes”have become a focus of research in recent years to analyze organism health.In this review,we summarized the sources,absorption properties,and the function of SCFA in both gut and other peripheral tissues(brain,kidney,liver,lung,bone and cardiovascular)in the way of“gut-organ axes”.Short chain fatty acids exert both beneficial and pathological role in gut and other organs in various ways,in which the beneficial effects are more pronounced.In addition,the beneficial effects are reflected in both preventive and therapeutic effects.More importantly,the mechanisms behinds the gut and other tissues provided insight into the function of SCFA,assisting in the development of novel preventive and therapeutic strategies for maintaining the host health.展开更多
Significant controversies exist with regards to the optimal management of lateral pelvic lymph nodes metastases(mLLN)in patients with low rectal cancer.The differing views held by Japanese and Western clinicians on th...Significant controversies exist with regards to the optimal management of lateral pelvic lymph nodes metastases(mLLN)in patients with low rectal cancer.The differing views held by Japanese and Western clinicians on the management of mLLN have been well documented.However,the adequacy of pelvic lymph node dissection(PLND)or neoadjuvant chemoradiation(NACRT)alone in addition to total mesorectal excision(TME)have recently come into question,due to the relatively high incidence of lateral local recurrences following PLND and TME,or NACRT and TME alone.Recently,a more selective approach to PLND has been suggested,involving a combination of neoadjuvant therapy,followed by PLND only to patients in whom the oncological benefit is likely to outweigh the risk of potential adverse events.A number of studies have attempted to retrospectively identify certain nodal characteristics on preoperative imaging,such as nodal size,appearance,and size reduction following neoadjuvant therapy.However,no consensus has been reached regarding the optimal criteria for a selective approach to PLND,partly due to the heterogeneity and retrospective nature of most of these studies.This review aims to provide an overview of recent evidence with regards to the diagnostic challenges,considerations for,and outcomes of the current management strategies for mLLN in rectal cancer patients.展开更多
Methamphetamine(Meth)abuse can cause serious mental disorders,including anxiety and depression.The gut microbiota is a crucial contributor to maintaining host mental health.Here,we aim to investigate if microbiota par...Methamphetamine(Meth)abuse can cause serious mental disorders,including anxiety and depression.The gut microbiota is a crucial contributor to maintaining host mental health.Here,we aim to investigate if microbiota participate in Meth-induced mental disorders,and the potential mechanisms involved.Here,15 mg/kg Meth resulted in anxiety-and depression-like behaviors of mice successfully and suppressed the Sigma-1 receptor(SIGMAR1)/BDNF/TRKB pathway in the hippocampus.Mean-while,Meth impaired gut homeostasis by arousing the Toll-like receptor 4(TLR4)-related colonic inflammation,disturbing the gut microbiome and reducing the microbiota-derived short-chain fatty acids(SCFAs).Moreover,fecal microbiota from Meth-administrated mice mediated the colonic inflam-mation and reproduced anxiety-and depression-like behaviors in recipients.Further,SCFAs supple-mentation optimized Meth-induced microbial dysbiosis,ameliorated colonic inflammation,and repressed anxiety-and depression-like behaviors.Finally,Sigmarl knockout(Sigmar1^(-/-))repressed the BDNF/TRKB pathway and produced similar behavioral phenotypes with Meth exposure,and elim-inated the anti-anxiety and-depression effects of SCFAs.The activation of SIGMAR1 with fluvoxamine attenuated Meth-induced anxiety-and depression-like behaviors.Our findings indicated that gut microbiota-derived SCFAs could optimize gut homeostasis,and ameliorate Meth-induced mental disorders in a SIGMAR1-dependent manner.This study confirms the crucial role of microbiota in Methrelated mental disorders and provides a potential preemptive therapy.展开更多
Fatty acids are energy substrates and cell components which participate in regulating signal transduction,transcription factor activity and secretion of bioactive lipid mediators.The acyl-CoA synthetases(ACSs)family c...Fatty acids are energy substrates and cell components which participate in regulating signal transduction,transcription factor activity and secretion of bioactive lipid mediators.The acyl-CoA synthetases(ACSs)family containing 26 family members exhibits tissue-specific distribution,distinct fatty acid substrate preferences and diverse biological functions.Increasing evidence indicates that dysregulation of fatty acid metabolism in the liver-gut axis,designated as the bidirectional relationship between the gut,microbiome and liver,is closely associated with a range of human diseases including metabolic disorders,inflammatory disease and carcinoma in the gastrointestinal tract and liver.In this review,we depict the role of ACSs in fatty acid metabolism,possible molecular mechanisms through which they exert functions,and their involvement in hepatocellular and colorectal carcinoma,with particular attention paid to long-chain fatty acids and small-chain fatty acids.Additionally,the liver-gut communication and the liver and gut intersection with the microbiome as well as diseases related to microbiota imbalance in the liver-gut axis are addressed.Moreover,the development of potentially therapeutic small molecules,proteins and compounds targeting ACSs in cancer treatment is summarized.展开更多
文摘Objective: In kidney diseases, uncontrolled blood pressure, inflammation, oxidative stress, imbalanced immunity response, metabolic dysfunction were associated with the progressive deterioration of renal function. Short-chain fatty acids (SCFAs), as a group of metabolites fermented by gut microbiota exerted regulatory effects on kidney diseases through their activation of transmembrane G protein-coupled receptors and their inhibition of histone acetylation. In this review article, we updated recent research advances that provided an opportunity to explore our understanding in physiology and function of SCFAs in kidney disease. Data sources: We performed a comprehensive search in both PubMed and Embase using short-chain fatty acids55 and "kidney" with no restrictions on publication date. Study selection: After reading through the title and abstract for early screening, the full text of relevant studies was identified and reviewed to summarize the roles of SCFAs in kidney diseases. Results: Though controversial, growing evidence suggested SCFAs appeared to have a complex but yet poorly understood communications with cellular and molecular processes that affected kidney function and responses to injury. From recent studies, SCFAs influenced multiple aspects of renal physiology including inflammation and immunity, fibrosis, blood pressure, and energy metabolism. Conclusions: The roles of intestinal SCFAs in kidney diseases were exciting regions in recent years;however, clinical trials and animal experiments in kidney diseases were still lacked. Thus, more research would be needed to obtain better understanding of SCFAs' potential effects in kidney diseases.
基金supported by the Jiangsu Provincial Key R&D Program(BE2018658)Jiangsu Provincial Medical Key Discipline(ZDXK202217)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
文摘Parkinson’s disease(PD)is a complicated neurodegenerative disease,characterized by the accumulation ofα-synuclein(α-syn)in Lewy bodies and neurites,and massive loss of midbrain dopamine neurons.Increasing evidence suggests that gut microbiota and microbial metabolites are involved in the development of PD.Among these,short-chain fatty acids(SCFAs),the most abundant microbial metabolites,have been proven to play a key role in brain-gut communication.In this review,we analyze the role of SCFAs in the pathology of PD from multiple dimensions and summarize the alterations of SCFAs in PD patients as well as their correlation with motor and non-motor symptoms.Future research should focus on further elucidating the role of SCFAs in neuroinflammation,as well as developing novel strategies employing SCFAs and their derivatives to treat PD.
文摘The objective of this work was to investigate the possibility of taper angle correction in cutting of complex micro-mechanical contours using a TruMicro ultra-short pulse laser in combination with the SCANLAB precSYS micro machining sub system. In a first step, the influence of the process parameters on the kerftaper angle of metallic alloys was systematically investigated without beam inclination. A set of base parameters was derived for the subsequent investigations. In a second step, the kerftaper angle was controlled by static beam inclination. In a third step, the same optics was used in its dynamic precession mode to fabricate micro-mechanical components of complex contours with perpendicular 0~ taper angles. It was found that taper angle adjustments of up to 7.5~ are possible with the used setup for cutting applications. Taper angle control is possible both in the static beam inclination mode and in the dynamic precession mode. The static mode could be interesting for contours with sharp inner radii and for achieving faster cutting times similar to results with fixed optics, but would require excellent synchronization of beam inclination and axis motion. The dynamic precession mode would allow an easier integration of the optics into a laser machine but will result in longer cutting times and limitations with respect to achievable inner radii.
基金supported by the National Key R&D Program of China (2022YFD1600104)the earmarked fund for CARS (CARS-36)the Agricultural Science and Technology Innovation Program (ASTIP-IAS12).
文摘Short chain fatty acids(SCFA)exist in dietary foods and are produced by the fermentation of gut microbiota,and are considered an important element for regulating host health.Through blood circulation,SCFA produced in the gut and obtained from foods have an impact on the intestinal health as well as vital organs of the host.It has been recognized that the gut is the“vital organ”in the host.As the gut microbial metabolites,SCFA could create an“axis”connecting the gut and to other organs.Therefore,the“gut-organ axes”have become a focus of research in recent years to analyze organism health.In this review,we summarized the sources,absorption properties,and the function of SCFA in both gut and other peripheral tissues(brain,kidney,liver,lung,bone and cardiovascular)in the way of“gut-organ axes”.Short chain fatty acids exert both beneficial and pathological role in gut and other organs in various ways,in which the beneficial effects are more pronounced.In addition,the beneficial effects are reflected in both preventive and therapeutic effects.More importantly,the mechanisms behinds the gut and other tissues provided insight into the function of SCFA,assisting in the development of novel preventive and therapeutic strategies for maintaining the host health.
文摘Significant controversies exist with regards to the optimal management of lateral pelvic lymph nodes metastases(mLLN)in patients with low rectal cancer.The differing views held by Japanese and Western clinicians on the management of mLLN have been well documented.However,the adequacy of pelvic lymph node dissection(PLND)or neoadjuvant chemoradiation(NACRT)alone in addition to total mesorectal excision(TME)have recently come into question,due to the relatively high incidence of lateral local recurrences following PLND and TME,or NACRT and TME alone.Recently,a more selective approach to PLND has been suggested,involving a combination of neoadjuvant therapy,followed by PLND only to patients in whom the oncological benefit is likely to outweigh the risk of potential adverse events.A number of studies have attempted to retrospectively identify certain nodal characteristics on preoperative imaging,such as nodal size,appearance,and size reduction following neoadjuvant therapy.However,no consensus has been reached regarding the optimal criteria for a selective approach to PLND,partly due to the heterogeneity and retrospective nature of most of these studies.This review aims to provide an overview of recent evidence with regards to the diagnostic challenges,considerations for,and outcomes of the current management strategies for mLLN in rectal cancer patients.
基金supported by the National Natural Science Foundation of China under Grant No.82171877the Department of Science and Technology of Guangzhou city under Grant No.202002030043(China)the Guangdong Natural Science Foundation under Grant No.2021A1515012456(China).
文摘Methamphetamine(Meth)abuse can cause serious mental disorders,including anxiety and depression.The gut microbiota is a crucial contributor to maintaining host mental health.Here,we aim to investigate if microbiota participate in Meth-induced mental disorders,and the potential mechanisms involved.Here,15 mg/kg Meth resulted in anxiety-and depression-like behaviors of mice successfully and suppressed the Sigma-1 receptor(SIGMAR1)/BDNF/TRKB pathway in the hippocampus.Mean-while,Meth impaired gut homeostasis by arousing the Toll-like receptor 4(TLR4)-related colonic inflammation,disturbing the gut microbiome and reducing the microbiota-derived short-chain fatty acids(SCFAs).Moreover,fecal microbiota from Meth-administrated mice mediated the colonic inflam-mation and reproduced anxiety-and depression-like behaviors in recipients.Further,SCFAs supple-mentation optimized Meth-induced microbial dysbiosis,ameliorated colonic inflammation,and repressed anxiety-and depression-like behaviors.Finally,Sigmarl knockout(Sigmar1^(-/-))repressed the BDNF/TRKB pathway and produced similar behavioral phenotypes with Meth exposure,and elim-inated the anti-anxiety and-depression effects of SCFAs.The activation of SIGMAR1 with fluvoxamine attenuated Meth-induced anxiety-and depression-like behaviors.Our findings indicated that gut microbiota-derived SCFAs could optimize gut homeostasis,and ameliorate Meth-induced mental disorders in a SIGMAR1-dependent manner.This study confirms the crucial role of microbiota in Methrelated mental disorders and provides a potential preemptive therapy.
基金Supported by the Interdisziplinäres Zentrum für Klinische Forschung(IZKF-MSP-06)of University Hospital Jena.
文摘Fatty acids are energy substrates and cell components which participate in regulating signal transduction,transcription factor activity and secretion of bioactive lipid mediators.The acyl-CoA synthetases(ACSs)family containing 26 family members exhibits tissue-specific distribution,distinct fatty acid substrate preferences and diverse biological functions.Increasing evidence indicates that dysregulation of fatty acid metabolism in the liver-gut axis,designated as the bidirectional relationship between the gut,microbiome and liver,is closely associated with a range of human diseases including metabolic disorders,inflammatory disease and carcinoma in the gastrointestinal tract and liver.In this review,we depict the role of ACSs in fatty acid metabolism,possible molecular mechanisms through which they exert functions,and their involvement in hepatocellular and colorectal carcinoma,with particular attention paid to long-chain fatty acids and small-chain fatty acids.Additionally,the liver-gut communication and the liver and gut intersection with the microbiome as well as diseases related to microbiota imbalance in the liver-gut axis are addressed.Moreover,the development of potentially therapeutic small molecules,proteins and compounds targeting ACSs in cancer treatment is summarized.
