Rau cov me nyuam mos thiab cov menyuam yaus, lactose tsis yog tsuas yog ib qho tseem ceeb ntawm lub zog, tab sis kuj koom nrog kev loj hlob ntawm lub hlwb. Txawm li cas los xij, vim tsis muaj lactose intolerance, qee tus menyuam yaus feem ntau txhim kho los ntawm kev noj cov mis tsis muaj lactose lossis lactose-dawb mis hmoov lossis ntxiv lactase, yog li dab tsi yog lactase? Nws puas tuaj yeem noj tau ntev?
Ua ntej nkag siab txog lub luag haujlwm ntawm lactase, peb yuav tsum paub tias lactose yog dab tsi?
Lactose yog ib hom suab thaj, uas tsuas yog muaj nyob rau hauv cov mis nyuj ntawm cov tsiaj nyeg, thiab yog ib qho ntawm cov khoom noj tseem ceeb rau kev loj hlob thiab kev loj hlob ntawm cov menyuam mos. Cov ntsiab lus ntawm lactose hauv cov kua mis yog 7.2 g / 100 ml, thiab cov ntsiab lus ntawm lactose hauv nyuj yog 4.7 g / 100 ml. Lub luag haujlwm tseem ceeb ntawm lactose yog muab lub zog cua sov, uas ua lub luag haujlwm tseem ceeb hauv tib neeg lub cev, tshwj xeeb tshaj yog menyuam mos thiab menyuam yaus:
1: Lactose muab lub zog cua sov rau menyuam yaus txoj kev loj hlob thiab kev loj hlob, metabolism, thiab cov ntaub so ntswg synthesis.
2: Lactose yog lub zog tsav rau kev loj hlob thiab kev ua ub no ntawm cov menyuam yaus hauv nruab nrog cev, paj hlwb, ceg, cov leeg, thiab lwm yam.
3: Galactose decomposed los ntawm lactose tuaj yeem txhawb kev tsim cov cerebrosides thiab mucopolysaccharides, yog li txhawb kev loj hlob ntawm kev txawj ntse ntawm cov menyuam mos thiab menyuam yaus.
Lactase alias: -galactosidase, lub luag haujlwm tseem ceeb yog catalyze hydrolysis ntawm lactose rau hauv qabzib thiab galactose (qabzib yog lub zog rau cov metabolism hauv ntau qhov ntawm tib neeg lub cev, thiab galactose yog cov suab thaj tsim nyog rau cov metabolism hauv tib neeg. paj hlwb thiab mucosal cov ntaub so ntswg tsim nyog rau kev loj hlob ntawm tus me nyuam lub hlwb, uas yog ze ze rau kev loj hlob sai ntawm lub hlwb me nyuam mos).
Lactose tsis tuaj yeem nqus tau ncaj qha rau hauv tib neeg lub cev thiab yuav tsum tau decomposed nyob rau hauv qhov kev txiav txim ntawm lactase kom nqus tau.
Lactase yog lub plab zom mov secreted los ntawm txhuam ciam teb hlwb ntawm cov hnyuv me, uas tuaj yeem decompose lactose hauv cov khoom noj rau hauv qabzib thiab galactose, uas tuaj yeem nqus tau thiab siv los ntawm cov hnyuv me me epithelial hlwb. Rau cov me nyuam mos thiab cov menyuam yaus, yog tias qhov kev ua ntawm lactase hauv cov hnyuv txo qis los yog qhov tso tawm tsis txaus, lactose hauv cov kua mis los yog mis nyuj tsis tuaj yeem ua kom tiav thiab nqus tau, thiab cov tsos mob ntawm lactose intolerance yuav tshwm sim.
Lactase yog dav faib thiab muaj nyob rau hauv cov kab mob (cov poov xab, fungi, kab mob thiab actinomycetes), nroj tsuag thiab tsiaj cov ntaub so ntswg. Lactase nws tus kheej muaj ob txoj haujlwm. Ib qho yog tias lactase tuaj yeem ua rau cov tshuaj tiv thaiv hydrolysis ntawm -1, 4 galactosidic bonds, thiab hydrolyze ib molecule ntawm lactose rau hauv ob monosaccharides, ib qho molecule txhua, galactose thiab qabzib; Lwm qhov yog lactose Lub enzyme kuj tuaj yeem tsim cov galactooligosaccharides los ntawm kev hloov galactosidic bonds. Kev thov ntawm lactase feem ntau yog ua raws li ob txoj haujlwm saum toj no:
1 Catalyze lub decomposition ntawm lactose Lactase yog tsuas yog siv nyob rau hauv cov khoom noj siv mis nyuj rau decompose lactose nyob rau hauv cov khoom noj siv mis nyuj los ntawm nws hydrolysis, thiab tsim cov mis nyuj uas tsis muaj lactose los yog lactose-dawb, uas yuav noj tau los ntawm cov neeg uas tsis muaj lactose intolerant. Tsis tas li ntawd, cov kua qaub lactase tuaj yeem ua rau kev kho mob lactase npaj, lossis ntxiv rau cov kua mis hmoov los ua cov kua mis tshwj xeeb, uas yog siv los kho cov tsos mob lactose intolerance, tshwj xeeb tshaj yog rau cov menyuam mos uas nws lub ntsiab ntawm cov khoom noj yog cov khoom noj siv mis. Kev npaj lactase yog qhov zoo tagnrho rau cov menyuam mos thiab menyuam yaus uas tsis muaj lactose intolerant.
2 Kev hloov ntawm galactoside los ntawm lactase Galactose generates galactooligosaccharides nyob rau hauv qhov kev txiav txim ntawm lactase transglycosidation. Cov tshuab no tuaj yeem siv los tsim cov galactooligosaccharides, thiab galactooligosaccharides tau muab tso rau hauv khw tam sim no. Galactooligosaccharides tsis tuaj yeem nqus los ntawm tib neeg lub cev, tab sis tuaj yeem siv los ntawm probiotics xws li bifidobacteria hauv plab hnyuv los txhawb kev loj hlob ntawm probiotics. Lawv yog cov zoo prebiotics, tseem hu ua bifidus yam. Galactooligosaccharides tsuas yog mis niam qhov chaw ntawm prebiotics.
Yog koj xav kawm ntxiv, thov hu rau jason@sxytbio.com,Nyem kom tau txais cov qauv dawb
