Abantu abaneenwele ezibomvu bangahlala ixesha elide xa befunda inyaniso malunga namajeni abo ...
Uluntu lusekelwe ngokwenene ngumbono wobutsha obungunaphakade, kodwa kude kube ngoku awunakwenzeka ukuba ufumane inkcazo yokuba kutheni enye inye yobudala bonke abantu babonakala behlukile. Ngokuqhelekileyo, imbonakalo yobutsha kunye nempilo enempilo kwiminyaka engama-50-60 ichazwa kukulala okuphezulu kunye nokutya okunempilo, kodwa oku akunjalo. Kukho imizekelo emininzi yokuba abantu abaneempawu ezinobungozi kunye neshedyuli yokusebenza enzima baba yixesha elide. Ngoko yintoni imfihlelo yolutsha ngoko? Iingcali zenzululwazi zifumene impendulo kulo mbuzo: kusemzimbeni othiwa "obomvu".
Iyini imfuyo "ebomvu"?
Inkqubela phambili ekuqondeni ukuba kutheni abanye abantu bekwazi ukujonga indlela yonke nangona bekhulile, izazinzulu ziye zazuza ngokufunda i-DNA yabantu. Kwikhowudi yemfuza yomntu ngamnye, i-gene ye-MC1R imiselwe, enoxanduva lokukhusela umzimba kumbane we-ultraviolet. Le yimilambo eyenza ukuguga kwesikhumba: ukubonakala kwemibimbi, ukuma kunye namabala okuhlaza. I-MC1R inciphisa ingozi yakhe kwi-epidermis, ngoko utshintsho lwesikhumba lwangaphandle lubonakala kubantu abasondele kuma-50, kwaye kungabi yiminyaka eyi-10. Ukufunyaniswa kokumangalisa kwesi sifo kunobunzululwazi kwiYunivesithi yase-Erasmus eNetherlands.
Njengengxenye yokufunda kwabo, oogqirha bathabatha iimvavanyo ze-DNA kubantu abayi-2,693 kwaye baphinde baqhuba uvavanyo lwe-dermatological yolusu lwabo ukuze bafumane ukuba babonakala bancinci kuneminyaka yabo yangempela. Kuloluhlu lweengqungquthela zalabo abanomzimba ongazifuni ukuthobela imithetho yokuguga ngokwemvelo, kwaye i-MC1R yafunyanwa. Imfuza efanayo ijongene nombala obomvu obomvu-yingakho ibizwa ngokuba ngumzimba "obomvu".
Ulutsha luxhomekeke njani kumbala wendlela yokubonakala?
Ngaba oku kuthetha ukuba abantu abaneenwele ezibomvu abanama-freckles bahlala bekhangeleka ngakumbi kunontanga yabo? Ngokuqinisekileyo, ewe. Imeko yesikhumba sabo ubuncinane ubuncinane iminyaka emibili "i-lags" ekugugeni kwi-gray-hair and blondes. Xa kuvela, abameli beYunivesithi banqwenela ukuqhubela phambili uphando ukuze bafumane oko kuza kuba ukuguga kwabantu abanezinye iinwele zeenwele kunye nekhumba ngaphandle kweenkontsho.
UNjingalwazi u-Ian Jackson wakwazi ukubonisa ubungqina benzululwazi ukuba abantu abanombala obomvu kunye nombala oboya obomvu baya kubonakala bebhetele kuneminyaka yobudala kunama-brown brown. Bamele babe nebala eliluhlaza okwesibhakabhaka, elimpunga okanye eliluhlaza ukuze bahambelane ngokupheleleyo nombala "obalahlekileyo". Uphando lofuzo oluthile lubizwa ngokuthi "uvavanyo lokudala."
UIan uthi:
"Isinyathelo esilandelayo kukudalwa into ebenokuyisebenzisela lo mfuzo kubo bonke abantu, kodwa okwamanje ulwazi olunjalo alufumanekanga kuthi."
Abaphandi abakwaziyo ukuqonda umgaqo wesenzo segciwane le-MC1R kwaye "bahlule" kwi-chain of genes efanayo. Kodwa bayaqiniseka ukuba ngokukhawuleza baya kuba nako ukudala isilwanyana, emva koko wonke umntu uya kubonakala esemncinci kwaye enhle.