Xanthine oxidase CAS: 9002-17-9
Catalog Number | xwm 90392 |
Khoom npe | Xanthine oxidase |
CAS | 9002-17-9 |
Molecular Formula | C18H29N5O10S2 |
Molecular Luj | 539.58 ib |
Cov ntaub ntawv khaws cia | 2 txog 8 ° C |
Harmonized tariff Code | 3 50790 |
Khoom Specification
Qhov tshwm sim | Dawb hmoov |
Sigma receptor 1 (σR1) yog ib qho uas tsis yog-opioid transmembrane protein uas yuav ua raws li molecular chaperone ntawm endoplasmic reticulum-mitochondrial membrane.Ligands rau σR1, xws li (+)-pentazocine [(+)-PTZ], confer marked retinal neuroprotection in vivo thiab in vitro.Tsis ntev los no peb tau soj ntsuam cov phenotype ntawm cov nas uas tsis muaj σR1 (σR1 KO) thiab pom cov kab mob ntawm cov retinal morphology thiab kev ua haujlwm hauv cov nas hluas (5-30 lub lis piam) tab sis txo qis cov lus teb tsis zoo scotopic (nSTRs), retinal ganglion cell (RGC) poob, thiab cuam tshuam. ntawm optic paj hlwb axons zoo ib yam nrog rau sab hauv retinal dysfunction los ntawm 1 xyoo.Cov ntaub ntawv no tau coj peb los ntsuas qhov kev xav tias σR1 yuav yog ib qho tseem ceeb hauv kev tiv thaiv kev ntxhov siab ntev ntev;Cov ntshav qab zib tau siv los ua tus qauv ntawm kev ntxhov siab ntev.Txhim kho seb σR1 puas yuav tsum tau rau (+)-PTZ neuroprotective teebmeem, thawj RGCs cais tawm ntawm cov tsiaj qus (WT) thiab σR1 KO nas tau raug xanthine-xanthine oxidase (10 µM: 2 mU / ml) rau induce oxidative kev nyuaj siab nyob rau hauv lub xub ntiag los yog tsis muaj (+)-PTZ.Kev tuag ntawm tes raug soj ntsuam los ntawm lub davhlau ya nyob twg deoxynucleotidyl transferase dUTP nick end labeling (TUNEL).Txhawm rau ntsuas qhov cuam tshuam ntawm kev ntxhov siab ntev ntawm RGC muaj nuj nqi, ntshav qab zib tau tshwm sim hauv 3-lub lis piam C57BL / 6 (WT) thiab σR1 KO nas, siv streptozotocin los ua plaub pawg: WT nondiabetic (WT non-DB), WT mob ntshav qab zib (WT-DB). ), σR1 KO tsis-DB, thiab σR1 KO-DB.Tom qab 12 lub lis piam ntawm ntshav qab zib, thaum cov nas muaj hnub nyoog 15-lub lis piam, cov tshuaj intraocular siab (IOP) tau sau tseg, kev kuaj electrophysiologic tau ua (xws li kuaj pom nSTRs), thiab cov naj npawb ntawm RGCs raug suav rau hauv cov kab mob hauv cov hlab ntsha. (+)-PTZ tsis tuaj yeem tiv thaiv oxidative stress-induced tuag ntawm RGCs sau los ntawm σR1 KO nas tab sis muaj peev xwm tiv thaiv kev tuag ntawm RGCs sau los ntawm WT nas.Hauv kev tshawb fawb txog kev ntxhov siab ntev los ntawm ntshav qab zib, IOP ntsuas hauv plaub pawg nas nyob hauv qhov qub;Txawm li cas los xij, muaj qhov nce ntxiv hauv IOP ntawm σR1 KO-DB nas (16 ± 0.5 mmH g) piv rau lwm pawg kuaj (σR1 KO tsis-DB, WT tsis-DB, WT-DB: ~ 12 ± 0.6 mmHg ).Hais txog kev kuaj electrophysiologic, nSTRs ntawm σR1 KO cov nas uas tsis yog DB tau zoo ib yam li WT cov nas uas tsis yog DB ntawm 15 lub lis piam;Txawm li cas los xij, lawv tau qis dua hauv σR1 KO-DB nas (5 ± 1 µV) piv rau lwm pab pawg, suav nrog, tshwj xeeb, σR1 KO-nonDB (12 ± 2 µV).Raws li qhov xav tau, tus naj npawb ntawm RGCs hauv σR1 KO cov nas uas tsis yog DB tau zoo ib yam li WT cov nas uas tsis yog DB ntawm 15 lub lis piam, tab sis nyob rau hauv kev nyuaj siab mob ntshav qab zib muaj tsawg RGCs hauv retinas ntawm σR1 KO-DB nas.Qhov no yog thawj daim ntawv qhia. qhia unequivocally tias cov teebmeem neuroprotective ntawm (+)-PTZ xav tau σR1.σR1 KO nas qhia cov qauv ntawm lub qhov muag thiab ua haujlwm ntawm cov hnub nyoog hluas;Txawm li cas los xij, thaum raug kev nyuaj siab mob ntshav qab zib mellitus, muaj kev ua kom lub cev ua haujlwm tsis zoo hauv σR1 KO nas xws li ganglion cell dysfunction tau pom thaum muaj hnub nyoog ntxov dua li cov nas uas tsis muaj ntshav qab zib σR1 KO nas.Cov ntaub ntawv txhawb nqa qhov kev xav tias σR1 ua lub luag haujlwm tseem ceeb hauv modu lating retinal stress thiab tej zaum yuav yog lub hom phiaj tseem ceeb rau cov kab mob retinal.