Cabanga ngakho, sonke sicabanga ukuthi iseli ngalinye emzimbeni wakho line-DNA yakho, akunjalo? Yilokho okuyisisekelo esikwaziyo ngezakhi zofuzo. Kodwa, akuvamile kakhulu, umzimba womuntu ungaba namaseli anohlobo lwesibili lwe-DNA olungeyona eyakhe, futhi lokho kuhluke ngokuphelele. Kuzwakala kungavamile kancane, akunjalo? Kwezokwelapha, lesi simo esimangalisayo sibizwa ngokuthi 'i-Chimerism'. Ungakhathazeki, akusona isifo. Ake sibone ukuthi siyini ngempela.
Kuyini 'i-Chimerism'?
Kalula nje, i-chimerism ukuba khona kwamaqoqo amabili amangqamuzana emzimbeni womuntu ofanayo avela kubantu ababili abahlukene ngofuzo. Lokhu kusho ukuthi amanye amangqamuzana emzimbeni wakho angaba nohlobo olulodwa lwe-DNA, kanti amanye amangqamuzana angaba nohlobo oluhlukile ngokuphelele lwe-DNA.
Enye yezindlela eziyinhloko lokhu okungenzeka ngazo ukuzalwa kwamawele. Cabanga ngomama othwele amawele esibelethweni sakhe. Emasontweni ambalwa okuqala okukhulelwa, enye yama-embryo ingase yehluleke ukukhula futhi inyamalale ngesizathu esithile. Lokhu kubizwa ngokuthi i-Vanishing Twin Syndrome. Uma lokhu kwenzeka, amaseli avela ku-embryo elahlekile amuncwa yi-embryo ephilayo ekhulayo. Ngakho-ke, umntwana uzoba namaseli akhe kanye namaseli avela kumfowabo olahlekile kukho konke ukuphila kwakhe.
Izinhlobo zamaseli ahlangana ngale ndlela zihlukile komunye nomunye. Ngokuvamile, lo mehluko ubonakala egazini. Ubizwa ngokuthi 'i-blood chimerism'. Lokhu kungenxa yokuthi amaseli egazi akhiwa emnkantsheni wamathambo aqinile futhi angadlula kalula ku-placenta. Ngokusho kocwaningo, cishe amawele angu-8% avamile angaba nalesi simo. Phakathi kwamawele amathathu, leli thuba likhuphuka lifike ku-21%.
Ziyini izimbangela ze-chimerism?
Njengoba sixoxile ngaphambili, abanye abantu bazalwa benalesi simo. Kodwa-ke, umuntu angathuthukisa i-chimerism ngesikhathi sokuphila kwakhe. Kunezizathu ezimbili eziyinhloko zalokhu. Ake sizichaze kanje.
| Imbangela | Incazelo yokuthi kwenzeka kanjani |
|---|---|
| I-Congenital Chimerism | Lena yi-'Vanishing Twin Syndrome' esikhulume ngayo ngaphambilini. I-embryo eyodwa ilahleka esibelethweni bese amaseli ayo amuncwa yi-embryo enye, okuholela ezinhlotsheni ezimbili zamaseli ezisele emzimbeni impilo yonke. |
| I-Chimerism Etholakale | Lokhu kwenziwa njengokwelashwa okusindisa impilo. Isibonelo, cabanga ngokufakelwa isitho somzimba . Uma umuntu ethola inso komunye umuntu ophilile, inso entsha isebenza ne-DNA yomnikeli. Umamukeli ube eseba ne-DNA yakhe kanye ne-DNA yomnikeli. Kunjalo nangokufakwa komnkantsha wethambo . Kulesi simo, umnkantsha wethambo lomnikeli ophilile ufakwa esikhundleni somnkantsha wethambo onesifo. Bese wonke amaseli egazi amasha enziwa nge-DNA yomnikeli. Lokhu kungashintsha ngisho nohlobo lwegazi lomuntu. |
Ingabe zikhona izimpawu zalokhu?
Izindaba ezinhle ukuthi iningi labantu abane-chimerism abanazo izimpawu. Abantu abaningi baphila impilo yabo yonke bengazi ukuthi banalesi simo. Ngenxa yokuthi akukho ukuhlolwa okuqondile kwaso, akuvamile ukuthola ukuxilongwa.
Kodwa-ke, ngezinye izikhathi lokhu kungaholela ezinkingeni ezingacabangeki, ikakhulukazi ngokuhlolwa kwe-DNA.
Cabanga nje, ubaba wenza ukuhlolwa kwe-DNA ukuqinisekisa ukuthi ingane ingubani. Kodwa umphumela uvela wokuthi akayena uyise wengane. Uqinisekile nge-100% ukuthi ingane yakhe. Okungenzeka lapha ukuthi uma ubaba ehlushwa yi-chimerism, i-DNA ayikho egazini lakhe noma ematheni, kodwa emangqamuzaneni akhe okuzala (isidoda). Yi-DNA yomfowabo owalahleka esibelethweni. Khona-ke ngofuzo ingane ihlobene naye njengokungathi ingane yomunye wabafowabo, okungukuthi, umshana noma umshana.
Izinto ezifanayo zingenzeka nakumama. Ngakho-ke, isikhathi esiningi, i-chimerism itholakala ngenxa yokungalingani okungahleliwe ngesikhathi sokuhlolwa kwe-DNA okunjengalokhu.
Ingabe lesi simo singadala izinkinga ezinkulu?
I-Chimerism akuyona isifo noma isimo esiyingozi, kodwa ingabangela izinkinga ezithile uma ungazazi.
- Izinkinga Zezomthetho: Njengoba kushiwo ngaphambili, imiphumela yokuhlolwa kobaba engalungile ingaholela ezinkingeni ezinkulu zomthetho mayelana nokugcinwa kwengane. Kube nezigameko eziningana ezinjalo ezibikiwe emhlabeni jikelele.
- Izinkinga zengqondo:Abanye abantu bangase babhekane nezinkinga zokushaqeka kwengqondo kanye nobunikazi lapho bethola ukuthi banezingxenye zomzimba womunye umuntu.
- Ukubaluleka kwezokwelapha: Kungabaluleka ukuqaphela lesi simo ngesikhathi sokuqhathaniswa kwezicubu ngaphambi kokufakelwa isitho.
Kodwa omama akudingeki bakhathazeke 'nge-vanishing twin syndrome'. Uma kwenzeka ezinyangeni ezintathu zokuqala zokukhulelwa, ngeke kulimaze umama noma umntwana ophilile. Umama angase angaboni zimpawu ngaphandle kokuphuma kwegazi okuncane.
Umlayezo Wokuya Nawe Ekhaya
- I-Chimerism ukuba khona kwezinhlobo ezimbili ze-DNA entweni eyodwa ephilayo. Lokhu kuvame ukwenzeka ngokumuncwa kwamaseli kusuka kumawele esibelethweni noma ngokufakelwa isitho/umnkantsha wethambo.
- Lesi akusona isimo esiyingozi. Iningi labantu abane-chimerism abanazo izimpawu.
- Inkinga enkulu ivela ngokuhlolwa kwe-DNA, ikakhulukazi ezintweni ezifana nokuhlolwa kobaba, lapho imiphumela ingaba engavumelani khona.
- Uma kwenzeka unenkinga engachazeki ngemiphumela yokuhlolwa kwe-DNA, khuluma nodokotela wakho mayelana nokwenzeka kwe-chimerism.
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