Mehlala ea Lipotso tse Buisanang ka Liphetoho tsa Phetoho le Mafu a Lefatseng
Liphetoho tsa lefutso le mafu a futsitsoeng ke lihlooho tse peli tsa bohlokoa, tse amanang le liphatsa tsa lefutso. Ka bobeli li fana ka temohisiso ea hore na lefa la liphatsa tsa lefutso le ka ama bophelo bo botle ba batho ka bomong le baahi ka kakaretso joang. Sehloohong sena, re tla tšohla mehlala e 'maloa ea mathata a shebaneng le liphetoho tsa lefutso le mafu a futsitsoeng, hammoho le litharollo tsa tsona, ho fana ka kutloisiso e tebileng ea lihlooho tsena.
Phetoho ea Liphatsa tsa Lefutso
Liphetoho tsa lefutso ke liphetoho tatellanong ea DNA tse ka hlahang ka mefuta e fapaneng, ho tloha phetohong e le 'ngoe ea motheo oa nucleotide (phetoho ea lintlha) ho isa ho hlakoloeng kapa ho kenngoa ha likarolo tse telele tsa DNA. Liphetoho tsa lefutso li ka etsahala ka tšohanyetso kapa tsa bakoa ke mabaka a kantle a kang mahlaseli kapa lik'hemik'hale. Ka tlase ke mehlala e meng ea mathata a bontšang mefuta ea liphetoho tsa lefutso le liphello tsa tsona.
Mohlala oa Potso ea 1: Phetoho ea Lintlha
Potso: Hlalosa liphello tsa liphetoho tsa lintlha liphatseng tsa lefutso tse ngolang li-enzyme tse bohlokoa bakeng sa metabolism.
Puisano:
Phetoho ea ntlha ke phetoho para e le 'ngoe ea motheo ho DNA. Haeba phetoho ena e etsahala sebakeng sa ho ngola khoutu ea jini, e ka nkela amino acid e le 'ngoe sebaka ka e 'ngoe protheineng e hlahisoang, e tsejoang e le phetoho e fosahetseng. Haeba enzyme e hlahang e na le sebopeho kapa mosebetsi o fapaneng, sena se ka sitisa lits'ebetso tsa metabolism tse itšetlehileng ka enzyme eo.
Mohlala o tsebahalang haholo oa phetoho e fosahetseng ke phetoho e bakang khaello ea mali ea sele ea sickle. Tabeng ena, motheo o le mong oa gene ea beta-globin oa fetoloa, o nkela amino acid glutamate sebaka ka valine boemong ba botšelela ba ketane ea polypeptide. Phetoho ena e etsa hore hemoglobin e kopane, e fetole lisele tse khubelu tsa mali hore e be li-sickle, 'me e lebise mathateng a fapaneng a bophelo bo botle.
Mafu a Futsaneng
Mafu a lefutso a bakoa ke liphetoho tsa liphatsa tsa lefutso tse ka fetisetsoang ho batsoali ho ea ho bana. Mafu ana a atisa ho aroloa ho latela mokhoa oa bona oa lefa, joalo ka autosomal dominant, autosomal recessive, X-linked, jj. Mohlala oa bothata ke o latelang ho bontša lefa la mafu a liphatsa tsa lefutso.
Mohlala oa Potso ea 2: Autosomal Dominant
Potso: Haeba motho ea nang le heterozygous bakeng sa lefu la Huntington (Hh) a nyalana le motho ea phetseng hantle (hh), fumana monyetla oa hore ngoana oa hae a be le lefu lena.
Puisano:
Lefu la Huntington ke mohlala oa lefu le laolang la autosomal leo ho lona allele e le 'ngoe feela e laolang (H) e ka bakang lefu lena. Motho ea nang le genotype ea Hh o bontša matšoao a lefu lena. Ha motho ea amehileng a nyalana le motho ea phetseng hantle (hh), liphello tse latelang ke tse ka bang teng tsa motsoako oa liphatsa tsa bona tsa lefutso:
– Monyetla oa 50% oa hore ngoana a be le genotype ea Hh (o tla ba le lefu lena)
– Monyetla oa 50% oa hore ngoana a be le mofuta oa hh genotype (o sa angoang ke lefu lena)
Tabeng ena, ngoana e mong le e mong oa banyalani bana o na le kotsi ea 50% ea ho futsa lefu la Huntington.
Mohlala oa Potso ea 3: Autosome Recessive
Potso: Banyalani ba na le lefu la cystic fibrosis le ipatileng (genotype Ff) mme ba batla ho tseba hore na ke karolo efe ea bana ba bona e ka bang le lefu lena.
Puisano:
Cystic fibrosis ke lefu le futsitsoeng la autosomal recessive, le hlokang li-allele tse peli tse recessive (ff) ho bontša matšoao. Haeba batsoali ka bobeli e le bajari ba patiloeng (Ff), mefuta e ka bang teng ea liphatsa tsa lefutso tsa bana ba bona ke e latelang:
– Monyetla oa 25% oa hore ngoana a be le genotype ea FF (e phetseng hantle 'me e se ea jereng)
– Monyetla oa 50% oa hore ngoana a be le mofuta oa Ff genotype (o phetse hantle empa a jere)
– Monyetla oa 25% oa hore ngoana a be le genotype ea ff (o tla ba le lefu lena)
Ka hona, ho na le monyetla oa 25% oa hore ngoana oa banyalani bana a be le cystic fibrosis.
Liphetoho tsa lefutso le ho lemoha mafu a liphatsa tsa lefutso
Ka tsoelo-pele theknolojing ea liphatsa tsa lefutso, ho fumanoa le ho laoloa ha mafu a liphatsa tsa lefutso esale pele ho atlehile haholoanyane. Liteko tsa liphatsa tsa lefutso li lumella ho tsebahatsa mojari le ho fumana hore na mafu a fapaneng a futsitsoeng a bakoa ke eng pele ho nako, e leng se nolofalletsang kalafo e potlakileng le/kapa liqeto tse betere tsa ho ikatisa.
Mohlala oa Potso ea 4: Tšebeliso ea Teko ea Liphatsa tsa Lefutso
Potso: Tšebeliso ea liteko tsa lefutso e ka thusa banyalani ba nang le nalane ea mafu a liphatsa tsa lefutso malapeng a bona joang?
Puisano:
Teko ea liphatsa tsa lefutso e ka sebelisoa bakeng sa merero e fapaneng. Bakeng sa banyalani ba nang le nalane ea malapa ea mafu a liphatsa tsa lefutso, teko ena e ka fana ka tlhahisoleseling ea bohlokoa mabapi le boemo ba motho ka mong ea jereng lefu lena. Sena se ba lumella ho utloisisa monyetla oa bona oa ho fetisetsa lefu lena ho bana ba bona le ho nahana ka likhetho tse kang:
1. Tlhahlobo ea Pele ho Kenyelletso (PGD): Haeba banyalani ba khetha ho sebelisa manyolo a entsoeng ka vitro (IVF), PGD e ka etsoa ho masea a embryo ho thibela phetiso ea mafu a itseng a liphatsa tsa lefutso.
2. Keletso ea Liphatsa tsa Lefutso: Banyalani ba ka buisana le moeletsi oa liphatsa tsa lefutso ho utloisisa likotsi le likhetho tsa bona, le ho fumana tšehetso ea maikutlo.
3. Tlhahlobo ea Pele ho Boimana: Ka liteko tsa tlhahlobo ea pele ho bokhachane tse kang amniocentesis kapa liteko tsa mali a lesea le sa keneng ka ntle, mafu a ka bang teng ho ngoana a ka tsejoa esale pele nakong ea boimana.
Ka kakaretso, ho lemoha le ho kenella esale pele ho ka fokotsa haholo tšusumetso ea mafu a liphatsa tsa lefutso le ho ntlafatsa boleng ba bophelo ba batho ba ka 'nang ba ameha.
Tšusumetso le Boitšoaro Patlisisong ea Liphatsa tsa Lefutso
Ho rarahana ha liphatsa tsa lefutso tsa batho ho na le tšusumetso e kholo eseng feela bophelong ba motho ka mong empa hape le maemong a kahisano le a boitšoaro a potolohileng theknoloji ea baeloji le liphatsa tsa lefutso.
Potso ea Mohlala oa 5: Boitšoaro Phetohong ea Liphatsa tsa Lefutso
Potso: Buisana ka liphephetso tsa boitšoaro tse ka hlahang ka lebaka la tšebeliso ea mahlale a phetoho ea liphatsa tsa lefutso joalo ka CRISPR ho batho.
Puisano:
Mahlale a kang CRISPR a lumella phetoho e nepahetseng haholo ea liphatsa tsa lefutso. Leha ho le joalo, ho sebelisa theknoloji ena ho batho ho hlahisa liphephetso tse 'maloa tsa boitšoaro, tse kang:
1. Polokeho le Katleho: Ho na le matšoenyeho mabapi le litla-morao tse sa batleheng tse ka bang teng kapa liphetoho tse sa lebelloang tse ka hlahisang mathata a macha a bophelo bo botle.
2. Tekano ea Phihlello: Phihlello ea mahlale a tsoetseng pele joalo ka CRISPR e ka atolosa lekhalo pakeng tsa ba ka khonang ho e lefella le ba sa khoneng, e leng se sieang potso e bulehileng ea hore na ke mang ea ruang molemo tsoelo-peleng ena.
3. Mehopolo ea ho Iphetola ha Lintho: Liphetoho tsa liphatsa tsa lefutso tse futsitsoeng li ka ba le liphello tsa nako e telele kholong ea motho tseo e ka 'nang eaba ha li e-so utloisisoe ka botlalo.
4. Bophelo le Boitsebiso: Phetoho ea liphatsa tsa lefutso tsa masea a motho e hlahisa lipotso mabapi le tokelo ea ho etsa liphetoho kholong ea motho ka lebitso la ntlafatso ea liphatsa tsa lefutso.
Ha ho tsamauoa tsoelo-pele ena, ho bohlokoa ho ba le moralo o matla oa boitšoaro le taolo ho netefatsa hore mahlale ana a sebelisoa molemong oa batho 'me ha a bake likotsi tse sa lebelloang.
Ka kutloisiso ea liphetoho tsa lefutso le mafu a futsitsoeng, hammoho le tsoelo-pele ea theknoloji ea liphatsa tsa lefutso, ho tšeptjoa hore re ka sebelisa tsebo ena ho ntlafatsa bophelo bo botle ba batho ka bophara. Leha ho le joalo, mokhoa ona o lokela ho sebelisoa ka hloko ho rarolla liphephetso tse amehang.
