Ngā Tauira Pātai e Matapaki ana i ngā Ira Whakarerekētanga me ngā Mate Tuku Iho
Ko ngā whakarerekētanga ira me ngā mate tuku iho he kaupapa nui e rua, e hono tahi ana i roto i te ira. Ka whakaratohia e ēnei e rua he tirohanga ki te pānga o te whakarerekētanga ira ki te hauora o te tangata takitahi me te taupori whānui. I roto i tēnei tuhinga, ka matapakihia e mātou ētahi tauira raruraru e aro ana ki ngā whakarerekētanga ira me ngā mate tuku iho, me ō rātou otinga, hei whakarato i te māramatanga hohonu ake ki ēnei kaupapa.
Te Whakarerekētanga Ira
Ko ngā whakarerekētanga ira he huringa i roto i te raupapatanga DNA ka puta i roto i ngā momo āhua, mai i te whakarerekētanga o te turanga nucleotide kotahi (whakarerekētanga ira) ki te mukunga, te whakaurunga rānei o ngā wāhanga roa o te DNA. Ka taea e ngā whakarerekētanga ira te puta noa, te puta rānei i ngā āhuatanga o waho pērā i te irahiko, i ngā matū rānei. Kei raro nei ētahi tauira raruraru e whakaatu ana i ngā momo whakarerekētanga ira me ō rātou pānga.
Tauira Pātai 1: Te Hurihanga Pūwāhi
Pātai: Whakamāramahia ngā pānga o ngā whakarerekētanga ira i roto i ngā ira e waehere ana mō ngā whākōkī e hira ana mō te pākia o te tinana.
Kōrero:
Ko te whakarerekētanga pūwāhi he whakarerekētanga i roto i te takirua turanga kotahi i roto i te DNA. Mena ka puta tēnei whakarerekētanga i roto i te rohe waehere o te ira, ka taea e ia te whakakapi i tētahi waikawa amino ki tētahi atu i roto i te pūmua ka puta, e mōhiotia ana ko te whakarerekētanga hapa. Mena he rerekē te hanganga, te mahi rānei o te whākōkī ka puta, ka taea e tēnei te whakararuraru i ngā tukanga pākia e whakawhirinaki ana ki taua whākōkī.
Ko tētahi tauira rongonui o te whakarerekētanga ira ko te whakarerekētanga ira e hua ai te mate toto toto toto. I tēnei wā, ka whakarerekētia tētahi pūtake kotahi i roto i te ira beta-globin, ka whakakapia te waikawa amino glutamate ki te valine i te ono o ngā tūranga o te mekameka polypeptide. Nā tēnei whakarerekētanga ka pupū te hemoglobin, ka huri i ngā toto toto whero hei toto toto toto toto, ā, ka arahi atu ki ngā raruraru hauora.
Ngā Mate Tuku Iho
Ko ngā mate tuku iho ka puta mai i ngā whakarerekētanga ira ka taea te tuku mai i ngā mātua ki ngā tamariki. He maha ngā wā ka whakarōpūtia ēnei mate i runga i tō rātou tauira tuku iho, pērā i te autosomal dominant, te autosomal recessive, te X-linked, me ētahi atu. Ko te tauira raruraru e whai ake nei hei whakaatu i te tukunga iho o ngā mate ira.
Tauira Pātai 2: Autosomal Dominant
Pātai: Mena ka moe tētahi tangata he heterozygous mō te mate a Huntington (Hh) i tētahi tangata hauora (hh), whakatauhia te tūponotanga ka pāngia tā rāua tamaiti e te mate.
Kōrero:
Ko te mate a Huntington he tauira o tētahi mate autosomal dominant e taea ai e te kotahi noa te allele dominant (H) te whakaputa i te mate. Ka whakaatuhia e te tangata he momoira Hh ngā tohu o te mate. Ina moe te tangata Hh (pāngia) i tētahi tangata hh (hauora), ko ngā putanga pea o tā rāua huinga ira:
– 50% te tūponotanga ka pāngia te tamaiti e te momo ira Hh (ka pāngia e te mate)
– 50% te tūponotanga ka pāngia te tamaiti e te momo ira hh (kāore e pāngia e te mate)
I tēnei āhuatanga, e 50% te mōrearea o ia tamaiti o te tokorua ki te tuku iho i te mate a Huntington.
Tauira Pātai 3: Autosome Recessive
Pātai: He kaikawe huna tētahi tokorua i te cystic fibrosis (ira momo Ff) ā, e hiahia ana rāua ki te mōhio ko tēhea ōrau o ā rāua tamariki ka pāngia e te mate.
Kōrero:
He mate tuku iho autosomal recessive te cystic fibrosis, e hiahiatia ana kia rua ngā ira recessive (ff) hei whakaatu i ngā tohu. Mena he kaikawe huna (Ff) ngā mātua e rua, ko ngā momo ira pea o ā rāua tamariki ko ēnei e whai ake nei:
– 25% te tūponotanga ka pāngia te tamaiti e te momoira FF (he hauora, ehara i te kaikawe)
– 50% te tūponotanga ka pāngia te tamaiti e te momoira Ff (he hauora engari he kaikawe)
– 25% te tūponotanga ka pāngia te tamaiti e te momo ira ff (ka pāngia e te mate)
Nō reira, e 25% te tūponotanga ka pāngia tētahi tamaiti o tēnei tokorua e te cystic fibrosis.
Ngā Ira Whakarerekētanga me te Kitenga Mate Ira
Nā te whanaketanga o te hangarau ira, kua kaha ake te kitea wawe me te whakahaere i ngā mate ira. Mā te whakamātautau ira ka taea te tautuhi i ngā kaikawe me te tautuhi i ngā momo mate tuku iho i te wā e hapu ana, ka taea ai te tere ake te maimoatanga me/ranei te pai ake o ngā whakataunga whakaputa uri.
Tauira Pātai 4: Te Whakamahinga o te Whakamātautau Ira
Pātai: Me pēhea te whakamahi i te whakamātautau ira hei āwhina i ngā tāne me ngā wāhine kua pāngia e ngā mate ira i roto i ō rātou whānau?
Kōrero:
He maha ngā kaupapa e taea ai te whakamahi i te whakamātautau ira. Mō ngā tāne me ngā wāhine he hītori whānau nō ngā mate ira, ka taea e tēnei whakamātautau te whakarato i ngā mōhiohio nui mō te āhua o ia tangata e kawe ana i te mate. Mā tēnei ka taea e rātou te mārama ki te tūponotanga o te tuku i te mate ki ā rātou tamariki, me te whakaaro ki ngā kōwhiringa pēnei i:
1. Te Tātaritanga i mua i te Whakatōnga (PGD): Mena ka whiriwhiri te tokorua ki te whakamahi i te whakatōnga in vitro (IVF), ka taea te mahi PGD ki ngā kukune hei ārai i te tuku i ētahi mate ira.
2. Tohutohu Ira: Ka taea e ngā tāne me ngā wāhine te kōrero ki tētahi kaitohutohu ira kia mārama ai ki ō rātou mōrearea me ngā kōwhiringa, me te tiki tautoko kare ā-roto.
3. Te Tirotiro i mua i te Whānautanga: Mā ngā whakamātautau tātaritanga mua i te whānautanga pērā i te amniocentesis, ngā whakamātautau toto kukune kore-whakaeke rānei, ka taea te tautuhi wawe i ngā mate pea i roto i te tamaiti i te wā e hapu ana.
I te nuinga o te wā, mā te kitenga wawe me te wawaotanga ka taea te whakaiti i te pānga o ngā mate ira me te whakapai ake i te kounga o te oranga o te hunga ka pāngia pea.
Te Pānga me ngā Tikanga Matatika i roto i te Rangahau Ira
He pānga nui tō te uauatanga o ngā ira tangata, ehara i te mea ki te hauora o te tangata takitahi anake, engari ki ngā āhuatanga pāpori me ngā āhuatanga matatika e pā ana ki te hangarau koiora me te ira.
Tauira Pātai 5: Ngā Tikanga Matatika i roto i te Whakarerekētanga Ira
Pātai: Matapakihia ngā wero matatika ka puta mai i te whakamahinga o ngā hangarau whakarerekētanga ira pēnei i te CRISPR i roto i te tangata.
Kōrero:
Mā ngā hangarau pēnei i a CRISPR ka taea te whakarerekē ira tino tika. Heoi, mā te whakamahi i tēnei hangarau ki te tangata ka ara ake he maha ngā wero matatika, pēnei i:
1. Te Haumaru me te Whai Huatanga: Kei te āwangawangahia ngā pānga taha kāore e hiahiatia, ngā whakarerekētanga ira rānei kei waho i te whāinga ka puta mai he raruraru hauora hou.
2. Te Whai Huarahi Taurite: Mā te urunga atu ki ngā hangarau matatau pēnei i a CRISPR ka whānui ake te āputa i waenga i te hunga ka taea te utu me te hunga kāore e taea te utu, ka waiho tuwhera te pātai ko wai ka whai hua mai i ēnei whanaketanga.
3. Ngā Whakaaro mō te Whakawhanaketanga: Ka pāngia pea te whanaketanga o te tangata e ngā huringa ira tuku iho mō te wā roa, kāore pea i te tino mārama.
4. Te Oranga me te Tuakiri: Mā te whakarerekētanga ira o ngā kukune tangata ka ara ake ngā pātai mō te tika ki te hanga huringa ki te whanaketanga tangata hei whakapai ake i te ira.
I te whakaterenga i ēnei ahunga whakamua, he mea nui kia whai anga matatika me ngā ture kaha hei whakarite kia whakamahia ēnei hangarau hei painga mō te tangata, ā, kia kore ai e puta he mōrearea ohorere.
Mā te mārama ki ngā whakarerekētanga ira me ngā mate tuku iho, me ngā whanaketanga o te hangarau ira, e tūmanakohia ana ka taea e tātou te whakamahi i tēnei mōhiotanga hei whakapai ake i te hauora o te tangata. Heoi, me āta whakatata atu ki tēnei huarahi hei aro atu ki ngā wero e pā ana.
