[1] SENDER R,FUCHS S,MILO R.Are we really vastly outnumbered? revisiting the ratio of bacterial to host cells in humans[J]. Cell,2016,164(3):337-340. [2] D'ARGENIO V,SALVATORE F. The role of the gut microbiome in the healthy adult status[J]. Clin Chim Acta, 2015,451(Pt A):97-102. [3] HADERER M,NEUBERT P,RINNER E,et al.Novel pathomechanism for spontaneous bacterial peritonitis: disruption of cell junctions by cellular and bacterial proteases[J]. Gut,2022,71(3):580-592. [4] BRUCE-KELLER A J,SALBAUM J M,BERTHOUD H R. Harnessing gut microbes for mental health: getting from here to there[J]. Biol Psychiatry,2018,83(3):214-223. [5] BERLEMONT R,MARTINY A C.Glycoside hydrolases across environmental microbial communities[J]. PLoS Comput Biol,2016,12(12):e1005300. [6] HOSKINS L C,BOULDING E T.Degradation of blood group antigens in human colon ecosystems. I. In vitro production of ABH blood group-degrading enzymes by enteric bacteria[J]. J Clin Invest,1976,57(1):63-73. [7] HOSOI E.Biological and clinical aspects of ABO blood group system[J]. J Med Invest,2008,55(3/4):174-182. [8] CHESTER M A,OLSSON M L.The ABO blood group gene: a locus of considerable genetic diversity[J]. Transfus Med Rev,2001,15(3):177-200. [9] DANIELS G.ABO, H,Lewis Systems[M]//Human Blood Groups,3rd edition.2013: 11-95. [10] HAKOMORI S.Antigen structure and genetic basis of histo-blood groups A,B and O: their changes associated with human cancer[J]. Biochim Biophys Acta,1999, 1473(1):247-266. [11] LLOYD K O.The chemistry and immunochemistry of blood group A,B,H,and Lewis antigens: past,present and future[J]. Glycoconj J,2000,17(7/8/9):531-541. [12] GOLDSTEIN J,SIVIGLIA G,HURST R,et al.Group B erythrocytes enzymatically converted to group O survive normally in A,B,and O individuals[J]. Science,1982, 215(4529):168-170. [13] LENNY L L,HURST R,GOLDSTEIN J,et al.Single-unit transfusions of RBC enzymatically converted from group B to group O to a and O normal volunteers[J]. Blood, 1991,77(6):1383-1388. [14] LENNY L L,HURST R,GOLDSTEIN J,et al.Transfusions to group O subjects of 2 units of red cells enzymatically converted from group B to group O[J]. Transfusion,1994,34(3):209-214. [15] LENNY L L,HURST R,ZHU A,et al.Multiple-unit and second transfusions of red cells enzymatically converted from group B to group O: report on the end of phase 1 trials[J]. Transfusion,1995,35(11):899-902. [16] KRUSKALL M S,AUBUCHON J P,ANTHONY K Y, et al.Transfusion to blood group A and O patients of group B RBCs that have been enzymatically converted to group O[J]. Transfusion,2000,40(11):1290-1298. [17] DOMINGUEZ-BELLO M G,GODOY-VITORINO F, KNIGHT R,et al. Role of the microbiome in human development[J]. Gut,2019,68(6):1108-1114. [18] MCNEIL N I.The contribution of the large intestine to energy supplies in man[J]. Am J Clin Nutr,1984, 39(2):338-342. [19] GUETTERMAN H M,HUEY S L,KNIGHT R,et al.Vitamin B-12 and the gastrointestinal microbiome: a systematic review[J]. Adv Nutr,2022,13(2):530-558. [20] GUSTAFSSON J K,ERMUND A,JOHANSSON M E V,et al. An ex vivo method for studying mucus formation,properties,and thickness in human colonic biopsies and mouse small and large intestinal explants[J]. Am J Physiol Gastrointest Liver Physiol,2012,302(4):G430-G438. [21] LUIS A S,HANSSON G C.Intestinal mucus and their glycans: A habitat for thriving microbiota[J]. Cell Host Microbe,2023,31(7):1087-1100. [22] ROSSEZ Y,MAES E,LEFEBVRE DARROMAN T,et al.Almost all human gastric mucin O-glycans harbor blood group A,B or H antigens and are potential binding sites for Helicobacter pylori[J]. Glycobiology,2012, 22(9):1193-1206. [23] HEGGELUND J E,VARROT A,IMBERTY A,et al.Histo-blood group antigens as mediators of infections[J]. Curr Opin Struct Biol,2017,44:190-200. [24] YANG H,WU J Y,HUANG X C,et al.ABO genotype alters the gut microbiota by regulating GalNAc levels in pigs[J]. Nature,2022,606(7913):358-367. [25] HOSKINS L C,AGUSTINES M,MCKEE W B,et al.Mucin degradation in human colon ecosystems. Isolation and properties of fecal strains that degrade ABH blood group antigens and oligosaccharides from mucin glycoproteins[J]. J Clin Invest,1985,75(3):944-953. [26] EL KAOUTARI A,ARMOUGOM F,GORDON J I, et al.The abundance and variety of carbohydrate-active enzymes in the human gut microbiota[J]. Nat Rev Microbiol, 2013,11(7):497-504. [27] IKEGAYA M,MIYAZAKI T,PARK E Y.Biochemical characterization of Bombyx mori α-N-acetylgalactosaminidase belonging to the glycoside hydrolase family 31[J]. Insect Mol Biol,2021,30(4):367-378. [28] MIYAZAKI T,PARK E Y.Crystal structure of the Enterococcus faecalis α-N-acetylgalactosaminidase,a member of the glycoside hydrolase family 31[J]. FEBS Lett,2020,594(14):2282-2293. [29] CALCUTT M J,HSIEH H Y,CHAPMAN L F,et al.Identification,molecular cloning and expression of an alpha-N-acetylgalactosaminidase gene from Clostridium perfringens[J]. FEMS Microbiol Lett,2002,214(1):77-80. [30] HSIEH H Y,CALCUTT M J,CHAPMAN L F,et al.Purification and characterization of a recombinant alpha-N-acetylgalactosaminidase from Clostridium perfringens[J]. Protein Expr Purif,2003,32(2):309-316. [31] RAHFELD P,SIM L,MOON H,et al.An enzymatic pathway in the human gut microbiome that converts A to universal O type blood[J]. Nat Microbiol,2019,4(9):1475-1485. [32] JENSEN M,STENFELT L,RICCI HAGMAN J,et al.Akkermansia muciniphila exoglycosidases target extended blood group antigens to generate ABO-universal blood[J]. Nat Microbiol,2024,9(5):1176-1188. [33] FUJITA K,OURA F,NAGAMINE N,et al.Identification and molecular cloning of a novel glycoside hydrolase family of core 1 type O-glycan-specific endo-alpha-N-acetylgalactosaminidase from Bifidobacterium longum[J]. J Biol Chem,2005,280(45):37415-37422. [34] KATAYAMA T,FUJITA K,YAMAMOTO K.Novel bifidobacterial glycosidases acting on sugar chains of mucin glycoproteins[J]. J Biosci Bioeng,2005,99(5):457-465. [35] KULINICH A,WANG Q,DUAN X C,et al.Biochemical characterization of the endo-α-N-acetylgalactosaminidase pool of the human gut symbiont Tyzzerella Nexilis[J]. Carbohydr Res,2020,490:107962. [36] KOUTSIOULIS D,LANDRY D,GUTHRIE E P.Novel endo-alpha-N-acetylgalactosaminidases with broader substrate specificity[J]. Glycobiology,2008,18(10):799-805. [37] RAHFELD P,WARDMAN J F,MEHR K,et al.Prospecting for microbial α-N-acetylgalactosaminidases yields a new class of GH31 O-glycanase[J]. J Biol Chem,2019,294(44):16400-16415. [38] KIYOHARA M,NAKATOMI T,KURIHARA S,et al.α-N-acetylgalactosaminidase from infant-associated bifidobacteria belonging to novel glycoside hydrolase family 129 is implicated in alternative mucin degradation pathway[J]. J Biol Chem,2012,287(1):693-700. [39] CHAKLADAR S,CHENG L,CHOI M,et al.Mechanistic evaluation of MelA α-galactosidase from Citrobacter freundii: a family 4 glycosyl hydrolase in which oxidation is rate-limiting[J]. Biochemistry,2011,50(20):4298-4308. [40] NAGAO Y,NAKADA T,IMOTO M,et al.Purification and analysis of the structure of alpha-galactosidase from Escherichia coli[J]. Biochem Biophys Res Commun,1988,151(1): 236-241. [41] ZHANG X L,VRIJENHOEK J E P,BONTEN M J M, et al. A genetic element present on megaplasmids allows Enterococcus faecium to use raffinose as carbon source[J]. Environ Microbiol,2011,13(2):518-528. [42] IKEGAYA M,PARK E Y,MIYAZAKI T.Structure-function analysis of bacterial GH31 α-galactosidases specific for α-(1→4)-galactobiose[J]. FEBS J,2023,290(20):4984-4998. [43] REDDY S K,BÅGENHOLM V,PUDLO N A,et al. A β-mannan utilization locus in Bacteroides ovatus involves a GH36 α-galactosidase active on galactomannans[J]. FEBS Lett,2016,590(14):2106-2118. [44] HELBERT W,POULET L,DROUILLARD S,et al.Discovery of novel carbohydrate-active enzymes through the rational exploration of the protein sequences space[J]. Proc Natl Acad Sci USA,2019,116(13):6063-6068. [45] LEDER S,HARTMEIER W,MARX S P.Alpha-galactosidase of Bifidobacterium adolescentis DSM 20083[J]. Curr Microbiol,1999,38(2):101-106. [46] ZHAO H,LU L L,XIAO M,et al.Cloning and characterization of a novel alpha-galactosidase from Bifidobacterium breve 203 capable of synthesizing Gal-alpha-1,4 linkage[J]. FEMS Microbiol Lett,2008,285(2):278-283. [47] SHIN Y J,WOO S H,JEONG H M,et al.Characterization of novel α-galactosidase in glycohydrolase family 97 from Bacteroides thetaiotaomicron and its immobilization for industrial application[J]. Int J Biol Macromol,2020,152:727-734. [48] LIU Q P,SULZENBACHER G,YUAN H P,et al.Bacterial glycosidases for the production of universal red blood cells[J]. Nat Biotechnol,2007,25(4):454-464. [49] LIU Q P,YUAN H P,BENNETT E P,et al.Identification of a GH110 subfamily of alpha 1,3-galactosidases: novel enzymes for removal of the alpha 3Gal xenotransplantation antigen[J]. J Biol Chem,2008,283(13):8545-8554. [50] WAKINAKA T,KIYOHARA M,KURIHARA S, et al.Bifidobacterial α-galactosidase with unique carbohydrate-binding module specifically acts on blood group B antigen[J]. Glycobiology,2013,23(2):232-240. [51] MÖLLER C,TERHOLSEN H,SCHMÖKER O,et al. Identification and protein engineering of galactosidases for the conversion of blood type B to blood type O[J]. Chembiochem,2025,26(7):e202500072. [52] GOLDSTEIN J.Conversion of ABO blood groups[J]. Transfus Med Rev,1989,3(3):206-212. [53] MACMILLAN S,HOSGOOD S A,WALKER-PANSE L, et al.Enzymatic conversion of human blood group A kidneys to universal blood group O[J]. Nat Commun, 2024,15(1):2795. [54] GARRATTY G.Modulating the red cell membrane to produce universal/stealth donor red cells suitable for transfusion[J]. Vox Sang,2008,94(2):87-95. [55] ZENG J,MA M,JIANG X J,et al.Enzymatic conversion of blood group B kidney prevents hyperacute antibody-mediated injuries in ABO-incompatible transplantation[J]. Nat Commun,2025,16(1):1506. [56] Abstract of 29th regional congress of the ISBT[J]. Vox Sang,2019,114(S1):5-240. [57] OLSSON M L,CLAUSEN H.Modifying the red cell surface: towards an ABO-universal blood supply[J]. Br J Haematol,2008,140(1):3-12. |