BACKGROUND Hyperuricemia(HUA)is a public health concern that needs to be solved urgently.The lyophilized powder of Poecilobdella manillensis has been shown to significantly alleviate HUA;however,its underlying metabol...BACKGROUND Hyperuricemia(HUA)is a public health concern that needs to be solved urgently.The lyophilized powder of Poecilobdella manillensis has been shown to significantly alleviate HUA;however,its underlying metabolic regulation remains unclear.AIM To explore the underlying mechanisms of Poecilobdella manillensis in HUA based on modulation of the gut microbiota and host metabolism.METHODS A mouse model of rapid HUA was established using a high-purine diet and potassium oxonate injections.The mice received oral drugs or saline.Additionally,16S rRNA sequencing and ultra-high performance liquid chromatography with quadrupole time-of-flight mass spectrometry-based untargeted metabolomics were performed to identify changes in the microbiome and host metabolome,respectively.The levels of uric acid transporters and epithelial tight junction proteins in the renal and intestinal tissues were analyzed using an enzyme-linked immunosorbent assay.RESULTS The protein extract of Poecilobdella manillensis lyophilized powder(49 mg/kg)showed an enhanced anti-trioxypurine ability than that of allopurinol(5 mg/kg)(P<0.05).A total of nine bacterial genera were identified to be closely related to the anti-trioxypurine activity of Poecilobdella manillensis powder,which included the genera of Prevotella,Delftia,Dialister,Akkermansia,Lactococcus,Escherichia_Shigella,Enterococcus,and Bacteroides.Furthermore,22 metabolites in the serum were found to be closely related to the anti-trioxypurine activity of Poecilobdella manillensis powder,which correlated to the Kyoto Encyclopedia of Genes and Genomes pathways of cysteine and methionine metabolism,sphingolipid metabolism,galactose metabolism,and phenylalanine,tyrosine,and tryptophan biosynthesis.Correlation analysis found that changes in the gut microbiota were significantly related to these metabolites.CONCLUSION The proteins in Poecilobdella manillensis powder were effective for HUA.Mechanistically,they are associated with improvements in gut microbiota dysbiosis and the regulation of sphingolipid and galactose metabolism.展开更多
Traditional Chinese medicine has a long and illustrious history,and with the development of modern science and technology,the research and application of traditional Chinese medicines have continued to progress signif...Traditional Chinese medicine has a long and illustrious history,and with the development of modern science and technology,the research and application of traditional Chinese medicines have continued to progress significantly.Many traditional Chinese medicinal herbs have undergone scientific validation,reinvi-gorating with new life and vitality,and contributing unique strengths to the advancement of human health.Recently,the discovery that leech total protein extracted from Poecilobdella manillensis lyophilized powder reduces blood uric acid(UA)levels by inhibiting the activity of xanthine oxidase to decrease UA synthesis and promotes UA excretion by regulating different UA transporters in the kidney and intestine has undoubtedly injected new vitality and hope into this field of research.The purpose of this editorial is to comment on this study,explore its strengths and weaknesses,and there is a hope to treat a range of metabolic-related syndromes,including hyperuricemia,by targeting the gut microbiota.展开更多
Aim To determine and analyze fatty acids, amino acids and trace elements of Hirudinaria manillensis. Methods Contents of fatty acids, amino acids and trace elements were determined by GC/MS, HPLC and ICP-AES. Results ...Aim To determine and analyze fatty acids, amino acids and trace elements of Hirudinaria manillensis. Methods Contents of fatty acids, amino acids and trace elements were determined by GC/MS, HPLC and ICP-AES. Results H. manillensis contained sixteen fatty acids, among which the percentage of unsaturated fatty acids is 34.05%. The eighteen amino acids were detected, which included eight essential amino acids in human body with a ratio of 33.53 %. There were eight trace elements （Ca, Cr, Cu, Fe, Mg, Mn, V and Zn） from H. manillensis, and the content of Ca, Zn and Fe were apparently higher than those of other elements. Conclusion These methods are simple and accurate. This study reports routine quantitative methods for the analysis of multiple components in H. manillensis by GC/MS, HPLC and ICP-AES.展开更多
Protease inhibitors have been reported rarely from the leech Hirudinaria manillensis.In this study,we purified a novel protease inhibitor(bdellin-HM-2)with anticoagulant properties from H.manillensis.With a molecular ...Protease inhibitors have been reported rarely from the leech Hirudinaria manillensis.In this study,we purified a novel protease inhibitor(bdellin-HM-2)with anticoagulant properties from H.manillensis.With a molecular weight of 1.4x104,bdellin-HM-2 was also characterized with three intra?molecular disulfide bridges at the N-terminus and multiple HHXDD and HXDD motifs at theC-terminus.cDNAcloning revealed that the putative nucleotide-encoding protein of bdellin-HM-2 contained 132 ami no acids and was encoded by a 399 bp open reading frame(ORF).Sequence alignment showed that bdellin-HM-2 shared similarity with the“non-classical"Kazal-type serine protease inhibitors,but had no inhibitory effect on trypsin,elastase,chymotrypsin,kallikrein,factor Xlla(FXIIa),factor Xia(FXIa),factor Xa(FXa),thrombin,or plasmin.Bdellin-HM-2 showed anticoagulant effects by proIonging the activated partial thromboplastin time(aPTT),indicating a role in enabling H.manillensis to obtain a blood meal from its host.Our results suggest that bdellin-HM丒2 may play a crucial role in blood-sucking in this leech species and may be a pote ntial can didate for the development of clinical anti-thrombotic drugs.展开更多
基金Supported by National Natural Science Foundation of China,No.82160843.
文摘BACKGROUND Hyperuricemia(HUA)is a public health concern that needs to be solved urgently.The lyophilized powder of Poecilobdella manillensis has been shown to significantly alleviate HUA;however,its underlying metabolic regulation remains unclear.AIM To explore the underlying mechanisms of Poecilobdella manillensis in HUA based on modulation of the gut microbiota and host metabolism.METHODS A mouse model of rapid HUA was established using a high-purine diet and potassium oxonate injections.The mice received oral drugs or saline.Additionally,16S rRNA sequencing and ultra-high performance liquid chromatography with quadrupole time-of-flight mass spectrometry-based untargeted metabolomics were performed to identify changes in the microbiome and host metabolome,respectively.The levels of uric acid transporters and epithelial tight junction proteins in the renal and intestinal tissues were analyzed using an enzyme-linked immunosorbent assay.RESULTS The protein extract of Poecilobdella manillensis lyophilized powder(49 mg/kg)showed an enhanced anti-trioxypurine ability than that of allopurinol(5 mg/kg)(P<0.05).A total of nine bacterial genera were identified to be closely related to the anti-trioxypurine activity of Poecilobdella manillensis powder,which included the genera of Prevotella,Delftia,Dialister,Akkermansia,Lactococcus,Escherichia_Shigella,Enterococcus,and Bacteroides.Furthermore,22 metabolites in the serum were found to be closely related to the anti-trioxypurine activity of Poecilobdella manillensis powder,which correlated to the Kyoto Encyclopedia of Genes and Genomes pathways of cysteine and methionine metabolism,sphingolipid metabolism,galactose metabolism,and phenylalanine,tyrosine,and tryptophan biosynthesis.Correlation analysis found that changes in the gut microbiota were significantly related to these metabolites.CONCLUSION The proteins in Poecilobdella manillensis powder were effective for HUA.Mechanistically,they are associated with improvements in gut microbiota dysbiosis and the regulation of sphingolipid and galactose metabolism.
文摘Traditional Chinese medicine has a long and illustrious history,and with the development of modern science and technology,the research and application of traditional Chinese medicines have continued to progress significantly.Many traditional Chinese medicinal herbs have undergone scientific validation,reinvi-gorating with new life and vitality,and contributing unique strengths to the advancement of human health.Recently,the discovery that leech total protein extracted from Poecilobdella manillensis lyophilized powder reduces blood uric acid(UA)levels by inhibiting the activity of xanthine oxidase to decrease UA synthesis and promotes UA excretion by regulating different UA transporters in the kidney and intestine has undoubtedly injected new vitality and hope into this field of research.The purpose of this editorial is to comment on this study,explore its strengths and weaknesses,and there is a hope to treat a range of metabolic-related syndromes,including hyperuricemia,by targeting the gut microbiota.
基金Department of Science & Technology of GuangdongProvince (No.0509119).
文摘Aim To determine and analyze fatty acids, amino acids and trace elements of Hirudinaria manillensis. Methods Contents of fatty acids, amino acids and trace elements were determined by GC/MS, HPLC and ICP-AES. Results H. manillensis contained sixteen fatty acids, among which the percentage of unsaturated fatty acids is 34.05%. The eighteen amino acids were detected, which included eight essential amino acids in human body with a ratio of 33.53 %. There were eight trace elements （Ca, Cr, Cu, Fe, Mg, Mn, V and Zn） from H. manillensis, and the content of Ca, Zn and Fe were apparently higher than those of other elements. Conclusion These methods are simple and accurate. This study reports routine quantitative methods for the analysis of multiple components in H. manillensis by GC/MS, HPLC and ICP-AES.
基金supported by the National Natural Science Foundation of China(21761142002,81770464)Ministry of Science and Technology of China(2018ZX09301043-003)+3 种基金Chinese Academy of Sciences(QYZDJ-SSW-SMC012,SAJC201606)West Light FoundationYouth Innovation Promotion Association(2017432)Yunnan Provincial Science and Technology Department(2017FB038,2015BC005)
文摘Protease inhibitors have been reported rarely from the leech Hirudinaria manillensis.In this study,we purified a novel protease inhibitor(bdellin-HM-2)with anticoagulant properties from H.manillensis.With a molecular weight of 1.4x104,bdellin-HM-2 was also characterized with three intra?molecular disulfide bridges at the N-terminus and multiple HHXDD and HXDD motifs at theC-terminus.cDNAcloning revealed that the putative nucleotide-encoding protein of bdellin-HM-2 contained 132 ami no acids and was encoded by a 399 bp open reading frame(ORF).Sequence alignment showed that bdellin-HM-2 shared similarity with the“non-classical"Kazal-type serine protease inhibitors,but had no inhibitory effect on trypsin,elastase,chymotrypsin,kallikrein,factor Xlla(FXIIa),factor Xia(FXIa),factor Xa(FXa),thrombin,or plasmin.Bdellin-HM-2 showed anticoagulant effects by proIonging the activated partial thromboplastin time(aPTT),indicating a role in enabling H.manillensis to obtain a blood meal from its host.Our results suggest that bdellin-HM丒2 may play a crucial role in blood-sucking in this leech species and may be a pote ntial can didate for the development of clinical anti-thrombotic drugs.
