DNA methylation: ib tug txheej txheem cej luam

Methylation yog lub koom ntawm ib cov pa roj carbon thiab peb hydrogen atoms mus rau lwm molecule. Qhov no tshwm sim yog hais tias yuav lub xeem lo lus nyob rau hauv kev kho mob. Nws yog nrog los ntawm qhov kev siv ntawm yuav luag tag nrho cov lub cev functions.

zog

Methyl pawg (carbon thiab hydrogen atoms) yog muab kev koom tes nyob rau hauv:

1. Lub cev lus teb rau stressful lub sijhawm.
2. Txoj kev loj hlob thiab ua cov glutathione. Nws ua raws li ib tug tseem ceeb antioxidant nyob rau hauv lub cev.
3. Detoxification cov tshuaj hormones, hnyav hlau thiab tshuaj tebchaw.
4. Tswj inflammatory dab.
5. Kho puas hlwb.
6. Immune teb thiab kev cai tiv thaiv cov kab mob thiab kab mob, ua rau tus tswj ntawm T-hlwb.

. Attendance tseem ceeb yog cov txheej txheem ntawm DNA methylation. Cia peb xav txog nws nyob rau hauv ntau yam.

Epigenetic tswj ntawm

способствует передаче паттернов следующему поколению клеток при митозе. DNA methylation qauv tswj cov kev hloov ntawm cov tiam tom ntej ntawm lub hlwb nyob rau hauv mitosis. Kuj ntev los no, nws twb tau pom hais tias tus txheej txheem ntawm kev koom pab pawg ntawm cov atoms nyob rau hauv lub terminally-differentiated lug muaj ib co kev twb kev txuas nrog cov tsim ntawm lub cim xeeb thiab synaptic plasticity. K. Miller thiab D. Qab zib soj ntsuam DNA methylation. Kawm phenomenon coj lawv mus xaus hais tias cov kev ua ntawm methyltransferase dezoksiribonukleinovokislotnoy ho nce nyob rau hauv cov tsiaj thaum lub sij hawm nco cov lus tshiab qhia. Qhov no yuav pab txo cov kev qhia ntawm cov noob uas suppress lub cim xeeb dab. Nyob rau hauv tas li ntawd, tus sau phau ntawv taw tes rau ib tug ntau tshaj plaws. Cov soj ntsuam ntawm qhia hais tias cov protein reelin noob ua kom, txhawb kev hloov thiab synaptic kev sib txuas muab kev koom tes nyob rau hauv lub pathological chav kawm ntawm schizophrenia muaj feem xyuam rau lub cim xeeb tsim. Thaum zoo li no qhov zoo tshaj yog conditioned demitalazy-enzymes muab cov DNA demethylation (tso tawm los ntawm lub methyl pawg). Tsim tseeb ua rau ib tug tseem ceeb xaus. , а также обратное ему явление, играют существенную роль при хранении информации и запоминании. DNA methylation raws li ib tug ntawm cov epigenetic mechanisms, raws li zoo raws li lub rov qab tshwm sim, ua si ib tug tseem ceeb luag hauj lwm nyob rau hauv ntaub ntawv cia thiab nco. Qhov no lub tswv yim twb paub tseeb hais tias los ntawm cov kev tshwm sim ntawm txoj kev tshawb pab pawg neeg E. Costa. Nws pom hais tias demitilirovanie reelin thiab glutamate decarboxylase noob yuav tsum conditioned nas me me molecules uas cuam tshuam nrog cov nroj tsuag DNA nyob rau hauv lub nucleus. Cov kev tshawb fawb qhia tsis tau tsuas yog tau hloov uas twb muaj lawm tswv yim hais txog qhov tsim los ntawm lub cim xeeb. является динамическим. Lawv kuj taw tes rau lub fact tias yav tas los xav tas mus li DNA methylation yog dynamic. Ntxiv mus, nws yuav siv tau nyob rau hauv txoj kev kho.

nta

имеют определенную связь, нельзя назвать новой. Lub tswv yim hais tias nco thiab DNA methylation muaj ib yam kev sib raug zoo, tsis tau hu ua tshiab. Nws twb tau tsim conditionality synaptic kis tau tus mob histone acetylation. Lawv tsim lub cev pob txha uas DNA yog lub qhov txhab. Acetylation thiaj li sib ze ntawm cov histone rau nucleic acids. Qhov no yuav qhib nkag tau mus rau DNA thiab lwm yam cov nqaijrog muaj feem xyuam rau, inter alia, nrog qhov ua kom ntawm noob. Nyob rau hauv qhov tseeb, lub histone ua si atsetilotransferaznaya CREBBP (losis tswvyim dabtsi protein), kuj yog ib qhov tseem ceeb transcription tau neurons tau txuam nrog cov nyhuv ntawm no protein nyob rau hauv kev cim cia. Tsis tas li ntawd, nws tau ices amplification check cim nco thaum lub sij hawm ntawm kev siv cov histone deacetylase inhibitors. Nws coj mus rau ib tug acceleration ntawm histone acetylation.

hypotheses

Qab zib thiab Miller nug cov lus nug uas muaj kev sib hwm mus rau lub histone-dependent hluav ntawm cov kev qhia cov qauv. ? Yog hais tias nws yuav ua si ib lub luag hauj lwm nyob rau hauv regulating nco, yuav ua rau cov nyhuv tib yam seb DNA methylation? Qhov no tshwm sim twb pom feem ntau raws li ib tug txhais tau tias ntawm tswj kev ua si thaum lub sij hawm mitosis thiab lug txoj kev systems. Txawm li cas los, nyob rau hauv lub mammalian lub hlwb matured cai siv methylases, txawm lub fact tias feem ntau ntawm cov hlwb yog nondividing. Vim lub fact tias qhov suav hais tias tshwm sim muaj txhawb rau kev tsuj ntawm noob qhia, kev soj ntsuam tsis muaj cuab kav tsis lees txais txoj kev sib txuas lus muaj tseeb methylase thiab ntxawg dab nyob rau hauv neurons.

Xyuas cov kev xav

этого явления в формировании памяти, обрабатывали срезы гиппокампа ингибиторами дезоксирибонуклеинокислотных метилтрансфераз. Qab zib thiab nws cov npoj yaig los ntawm tshuaj ntsuam lub methylation ntawm DNA, qhov tseem ceeb ntawm no tshwm sim nyob rau hauv lub tsim ntawm lub cim xeeb, hippocampal slices kho nrog inhibitors dezoksiribonukleinokislotnyh methyltransferases. Lawv pom hais tias nws tiv thaiv cov pib ntawm ntev-lub sij hawm potentiation - lub strengthening ntawm synaptic kev sib txuas nyob rau hauv cov lus teb rau neuronal kev ua si. Qhov no txoj kev ua cov nyhuv ntawm kev kawm thiab kev nco mechanisms. Zaum kuj pom tias inhibitors poob theem ntawm methylation nyob rau hauv DNA reelin. Nws taw tes qhia rau nws cov reversibility.

thwmsim

Kev txiav txim siab mus ntxiv nyob rau hauv lawv cov kev tshawb fawb, Qab zib thiab Miller pib los saib xyuas cov kev hloov nyob rau hauv lub methylation qauv nyob rau hauv lub nas nyob rau hauv ib tug qauv nyob rau hauv cov tsiaj kawm ua ke ib qho chaw nrog tsis kaj siab stimuli, nyob rau hauv particular, tsis muaj zog shocks. Tus cwj pwm kev sim uas tau txais inhibitors, qhia tau ntawm kev kawm teeb meem. Nrhiav tau lawv tus kheej nyob rau hauv ib qhov teeb meem nyob qhov twg lawv yuav tsum tau yuav ib tug ntshai, lawv froze ho tsawg tshaj li cov kev tswj tsiaj.

tshawb pom

Yuav ua li cas methylation yuav muaj kev cuam tshuam rau txoj kev nco ntawm nas? Zaum tau piav no raws li nram no. Cov DNA yog tam sim no ib tug ntau ntawm feem uas yuav cuam tshuam rau kev koom pab pawg ntawm cov hydrogen thiab cov pa roj carbon atoms. Nyob rau hauv no hais txog, tus neeg tshawb fawb txiav txim siab los siv rau hauv qab no phenomenon. Lawv kawm feem ntau methylation ntawm noob uas nws lub luag hauj lwm nyob rau hauv lub tsim ntawm lub cim xeeb twb tau teem. Nws twb xub coj mus rau ib cheeb tsam nyob rau hauv uas lub protein phosphatase nco dab yog suppressed. tsis qhia yuav ua rau cov lus rov nyhuv. Tseeb, ib teev ntawm txias contextual ntshai methylation theem nce ntau tshaj ib puas lub sij hawm. Nyob rau hauv cov ntaub ntawv no, lub mRNA theem nyob rau hauv hippocampal CA1 cheeb tsam raug mus rau ib tug tsis muaj zog, tab sis cov lus tseem ceeb yuav txo tau. Cov nyhuv no yog pom nyob rau hauv lub hlwb ntawm cov tsiaj nrog ib tug ua ke ntawm me me shocks mus rau lub extremities thiab lub ntsiab lus teb ntawm novelty. Nyias, cov incentives tsis txhob muab tej nyhuv rau methylation. Raws li, qhov kev koom pab pawg yog nqa tawm heev dua lwm yam nrog rau tam sim no qhia.

DNA methylation thiab laus

Teeb meem ntawm hnub nyoog thiab cov tsos mob cancer yog ib qho ntawm feem sib tham txog tej yam. Nyob ntau xyoo ntawm kev tshawb fawb, zaum tau pom tias ib tug ntau yam ntawm theories thiab cov qauv. Txawm li cas los, tej nuj nqis cov tswvyim nyob rau lub sij hawm ntawd tsis teb tag nrho rau tag nrho cov lus nug. Meanwhile, qhov loj tshaj kev txaus siab nyob rau hauv cov kev tshawb fawb rau cov ntsiab yog txoj kev tshawb no ntawm kev laus kev hloov nyob rau hauv noob kev ua si. Nyob rau hauv kev, nws lub tswv yim nyob rau hauv qhov teeb meem tau teev cov xibfwb Anisimov. Nws cov ntsiab lus tawm hais tias cov manifestation (qhia) ntawm cov noob yog nyob, cov lwm yam, los ntawm methylation, uas muaj peev xwm muaj kev cuam tshuam rau tus nqi ntawm cov laus. Mus txog rau 5% ntawm cytosine residues ntawm deoxyribonucleic acid tau koom pawg ntawm cov pa roj carbon thiab hydrogen atoms tsim 5mTs (5-methylcytosine). Qhov no puag yog xav tau xwb qhov nyob rau hauv lub DNA ntawm ntau dua cov kab mob no. Koom pawg yuav siv sij hawm qhov chaw nyob rau ob qho tib si strands symmetrically. Seem 5mTs yeej ib txwm nkaum qab lub guanine residues. Nyob rau hauv cov qauv no muaj ntau zog. Txawm li cas los, nws yog ib qho tseem ceeb kom nco ntsoov tias methylation yog muab kev koom tes nyob rau hauv cov kev cai ntawm noob kev ua si. Cov kev hloov nyob rau hauv lub chav kawm ntawm kev koom pab pawg yog tshwm sim los ntawm swb nyob rau hauv cov theem ntawm transcription.

yog vim li cas

Muaj hnub nyoog-demethylation twb xub piav nyob rau hauv 1973. Qhov no txawv twb ntes tau degree ntawm kev sib cais ntawm cov pab pawg nyob rau hauv nas ntaub so ntswg. Nyob rau hauv lub paj hlwb, demethylation mus ntau nquag tshaj nyob rau hauv lub siab. Nws twb tom qab txiav txim 5mTs poob nrog lub hnub nyoog nyob rau hauv lub ntsws, raws li zoo raws li fibroblast daim tawv nqaij formations. Cov soj ntsuam ntawm pom tias lub hnub nyoog-demethylation predispose hlwb phem transformation. Qhov no tshwm sim muaj peev xwm yuav qhia nyob rau hauv yooj yim cov ntsiab lus raws li nram no. Ib tug tsaug noob twb coupled rau methyl pab pawg neeg. Nyob rau hauv tus ntawm cov tshuaj tshua mus rau nws cov disconnection. Raws li, qhov noob yog tshuab txais. Group ua lub zog ntawm atoms fuse. Tus me tus xov tooj, qhov ntau differentiated hlwb thiab yog li laus tshaj lawv ntau - ces nws yog yau. Ib tug classic piv txwv yog dav siv nyob rau hauv cov ntawv nyeem, yuav ua nyob rau hauv txoj kev loj hlob ntawm tej hom ntawm salmon. Ib tug tshwm sim ntawm lawv tsis tshua muaj neeg ceev ceev tuag tam sim ntawd tom qab spawning. Nag hmo tseem hluas neeg deev muaj hnub nyoog tuag nyob rau hauv ib luv luv lub sij hawm. Nyob rau hauv lub lom lub hom phiaj, no phenomenon yog ceev laus, uas yog nrog los ntawm loj-scale DNA demethylation.

Yuav ua li cas mus pab tau lub cev?

Muaj ntau ntau txoj kev los ntawm cov uas los txhim kho innate DNA methylation. Ntawm cov feem ntau nrov yuav tsum tau hu ua:

1. Noj tshiab zaub. nplooj zaub yog tshwj xeeb tshaj yog pom zoo. Lawv ua raws li ib tug qhov chaw ntawm folic acid yuav tsum tau mus kom zoo methylation.
2. Vitamins B12 thiab B6, riboflavin. Lawv qhov chaw yog qe, ntses, almonds, walnuts, asparagus thiab thiaj li nyob.
3. Tau txais ib tug txaus tus nqi ntawm zinc thiab magnesium. Lawv muab cov txij nkawm methylation.
4. Nkag probiotics. Lawv pab mus rau kev npaj thiab nqus ntawm cov vitamins B pab pawg neeg thiab folic rau-koj.

Nws tseem ceeb heev los txo cov kev nyuaj siab, muab tsis tau phem (cawv noj, kev haus luam yeeb). Care yuav tsum tau coj li ntawd, hais tias lub cev tsis tau txais cov tshuaj lom tshuaj. Cov tebchaw coj methyl pawg loaded siab.