Ukuqonda le ngxaki
Uphando lwesitampu se-stem ngumcimbi onzima kwaye uphikisana. Ngaphambi kokuba ube yinto okanye ukuchasene nayo, kufuneka uqonde ngokupheleleyo isigama, isakhono, kunye nemiphumo yophando lwe-cell stem. Kukho iinkcukacha ezicacileyo ezibonisa ukujonga uphando lwe-cell stem. Yenziwe:
- mbandela wezopolitiko
- mbandela wenkolo
- nomgangatho wobomi
Phakathi no-Meyi 2005 uMongameli uBush wathi, "Ndiyinyxaso enamandla yocwaningo lwe-cell stem, kodwa ndiyicacile kakhulu kwiCongress ukuba ukusetyenziswa kwemali yomrhumo wentlawulo karhulumente ukukhuthaza inzululwazi ebhubhisa ubomi ukuze igcine ubomi, ndichasene nale. "
Ziziphi ii-cell stem (SC)?
I-SC ihluke kwezinye iintlobo zeeseli emzimbeni. Kungakhathaliseki ukuba zivela phi, ziyakwazi ukwahlula nokuzihlaziya ngokwabo ixesha elide. Nangona bengabalulekanga, banokuvelisa iintlobo ezikhethekileyo zeeseli (oko kukuthi isisu, igazi elibomvu, ingqondo).
Ziziphi ii-cell stem cell (ESC)?
I-ESC ivela kwiimbrusi ezivela kumaqanda ahlonywe kwi-vitro, kwiklinikhi ye-vitro fertilization. Zinikezelwa ngeenjongo zophando ngemvume enolwazi lwababanikeli. Akhange athabathe amaqanda aqeshwe kumzimba wesifazana - ukungaqondi kakuhle.
Ziziphi ii-cell stem cells (ASC)?
I-ASC ayifanelekanga, ifumaneka kwiintlobo zeefenethi ezahlukileyo kwiisuncu okanye kwiqumrhu. I-ASC ikwazi ukuzihlaziya, kwaye iyakwazi ukwahlula ukuvelisa iindidi ezikhethekileyo zeesisiti okanye isitho. Indima yabo ephambili kwindawo ephilayo kukugcina nokulungisa izicubu ezifumaneka kuzo.
I-ESC ne-ASC ifana njani kwaye bahluke njani?
Bahluke kwinani kunye nohlobo lweeseli ezahlukileyo abangaba nazo. I-ESC ingaba zonke iintlobo ezitholakala emzimbeni. I-ASC kuthiwa yinto ephikisanayo, ngokuqhelekileyo iyancipha ukuhlukana kwiindidi ezahlukeneyo zeesistim zazo. Nangona kunjalo, obunye ubungqina bubonisa ukuba i-ASC evela kwimizimba yabantu abadala iyakwazi ukuvelisa iintlobo ezahlukeneyo zeeseli zenye iishukela ezindala.
Iinkonzo
Ukuqhubela phambili uphando malunga namaseli e-embryonic stem kungabonisa ukuba iiseliti ezixhamlileyo zingabonakali njani. Kuyaziwa ukuba ukuguqula ii-gale kunye nokukhupha kukuphambili kwenkqubo. Ezinye zezona zonyango zibi kakhulu zibangelwa ukuhlukana kweeseli ezingaqhelekanga kunye nokwahlukana.
Ukuqonda okungcono indlela ezi nkqubo zilawulwa ngayo kwi-genetic ne-molecular level zingakhokelela eku:
- ulwazi olunzulu malunga nesizathu sezifo ezininzi
- amatsha amatsha angcono
- ezinokunyanga ezinokwenzeka kwiimeko ezininzi zonyango
Ukubeka nje, abo bancedisa uphando lwe-embryonic stem cell cell bakholelwa ukuba kunokukhokelela ekunyangekeni kwezifo ezininzi, kuquka:
- Irheumatoid arthritis
- Lupus
- Scleroderma
- Sikashukela
- Isifo sikaParkinson
- Isifo se-Alzheimer
- Isifo sentliziyo
- Cancer
- Ukulimala kwentambo yomgca
Amaseli e-stem angasetyenziselwa ukuvavanya amachiza amatsha. Ngokutsho kwe-NIH (iiNational Institutes of Health, "ukukhangela iziyobisi ngokuchanekileyo, iimeko kufuneka zifanane nokuthelekisa iziyobisi ezahlukileyo.) Ngoko ke, izazinzulu ziya kufuneka zikwazi ukulawula ngokucacileyo ukwahlukana kweeseli ezinamaqhina kwi-cell ekhethekileyo apho ziya kuvavanywa. Ulwazi olwangoku lweempawu zokulawula ukwahlukana luba lufutshane kakhulu ukukwazi ukulinganisa le meko ngokuchanekileyo ukuba ibe neeseli ezahlukileyo ezahlukileyo kwiilisi nganye zivavanywa. "
Isidingo sokukhutshwa kwezicubu kunye namaziko aphezulu kakhulu kunikezelo olukhoyo. Amaseli esitshixo, aqondiswe ukuba ahluke kwiintlobo ezithile zeeseli, anokunika ithuba lokuhlaziywa kwakhona kweeseli kunye nezicubu zokuguqula izifo ezininzi.
Umxhasi
Enye yezichaso eziphambili kwi-embryonic cell cell research yenzani nenkolelo yokuba ukusebenzisa ii-embrosikizi kubomi. Abantu abami bomelele emva kwesi sikhokelo bakholelwa ukuba nangenxa yocwaningo lwezonyango kunye nokuba nethuba lokulondoloza ubomi, akulungile. Kuba abantu abachasayo uphando lwe-stem cell cell uyingxaki yokuziphatha kunye nokuziphatha okugqithisileyo.
Akukho siqinisekiso sokuthi ukuqhubela phambili nge-embryonic cell cell survey kuya kuvelisa iziphumo ezifunwayo. Oko, nanjalo, ingxaki kwabanye abachasayo. Ukusetyenziswa kwamaseli e-embryonic stem, kule ngqungquthela, ngokungafani nama-cell stem cells ezibonise iziphumo zonyango.
Apho ibeka khona
Ukuqonda le ngxaki ngaphambi kokuvelisa uluvo luyimfuneko. Uphando lwesitampu se-stem ngumcimbi onzima, ngokungathandabuzekiyo. Uphando olongezelelweyo malunga neendlela zesayensi kunye neendlela zokuziphatha ziza kubangela ukuba ube nolwazi olunzulu nolwazi, kunye nesqinisekiso sokuthi umile ngecala lemiba eninzi ihambelana neenkolelo zakho.