Te Kikorangi Metilīni me te Mate Huka: He Whakamārama mō te Kawe Kūhuka me te Rangahau Kararehe

Te pātai kei muri i te whakahaumako

He arorau te āhua o taua whakatau, engari e ahu mai ana i tētahi tauira whakaaro hē. Ka whakaarohia ngā ariā rerekē e toru hei mea kotahi: ko te urunga kūhuka ki tētahi pūtau kotahi i roto i te rīhi, ko te pākia i roto i tētahi mitokonoria o te manawa, me te whakahaere kūhuka i roto i te tangata katoa. Kei tēnā, kei tēnā ōna ake inenga me ōna ake herenga. Ka wehewehea ēnei e tēnei tuhinga.

Te whakautu poto: ka whakahohe tonu te kikorangi metilīni i te kawe kūhuka i tētahi rārangi pūtau kua tino rangahaua, ā, ka whakarerekē tonu i te matū o ngā mitokonoria me ētahi inenga manawa i ngā kiore mate huka. Engari, i te rangahau kiore roa rawa, kāore i whakarerekē i te kūhuka i te wā nohopuku, i te pūtoto kua herea ki te huka rānei, ā, kāore he taunakitanga tangata kua whakaputaina e whakaatu ana ka whakapai ake te kikorangi metilīni ka tukuna ki te tinana whānui i te huka toto, i te HbA1c, i te inisulini rānei i te mate huka.

Ngā pūtau: he tere ake te urunga kūhuka mā ngā pūkawe kei te kiriuhi kē

I whakamahia e ngā kairangahau ngā pūtau whītau L929, he rārangi pūtau e whakawhirinaki ana tōna tango kūhuka ki tētahi pūkawe kotahi, arā, ko GLUT1. Nā te mea kotahi anake te pūkawe, me ahu mai ngā panonitanga katoa o te tango kūhuka i taua pūkawe.

I te wā i whakapāngia ēnei pūtau ki te kikorangi metilīni, ka piki te tango matū whaiwhai i roto i te 10 meneti, ā, i hāngai te pikinga ki te horopeta. I tae ki te āhua 800 ōrau o te taumata tīmatanga i te 50 micromolar mō te 45 meneti. He mea nui te taipitopito mō te tere: i piki te tere mōrahi (Vmax), engari i noho pūmau te kaha here (Km) me te nui o te pūmua GLUT1. Nā taua maha tonu o ngā kūaha i tuku kia nui ake te kūhuka e puta mā reira i ia meneti. Nā te waikano i whakahohe ngā pūkawe kei te kiriuhi kē, kāore i tāpiri i ētahi mea hou.

Ka mārama ake te āhua mā ngā whakamātautau whakahaere. Kāore te āhua kua whakaitihia ā-matū, kāore hoki ōna tae, i whai pānga. Nā tētahi matū whakahāora kei waho i te pūtau, i aukati i te urunga o te waikano, i aukati hoki te whakapā tae me te whakaoho. Kāore ngā matū aukati i ngā ara AMP kinase me PI kinase i whakarerekē i tētahi mea; he taunaki tēnei kāore aua ara tuku tohu rongonui e rua i whai wāhi.

Ko te whakapae tuatahi ko te huringa whakahāora–whakaiti: ka whakawhiti te waikano i ngā irahiko, ka whakararu paku i te pūtau, ā, ka whakatuwhera ngā pūtau kua whakararu i ngā kūaha kūhuka. I whakamātauria taua whakaaro e tētahi rangahau whai muri. I whakamahia e ngā kairangahau te methyl-beta-cyclodextrin, he rāpoi ā-mowhiti e mau ai te kikorangi metilīni ki roto i tētahi matatini whakauru (ko te pūmau hononga he tata ki te 310 M-1). Kāore te waikano kua mau i whakapā tae ki ngā pūtau, kāore hoki i whakaoho i te tango kūhuka. I tino hāngai te horoinga atu o te waikano ki te ngaronga o te pānga. I whakahē tā rātou whakatau i te kōrero whakahāora–whakaiti: ko te take pea o te whakahohe he pāhekoheko hāngai a te waikano ki tētahi pūmua i te ara whakahohe GLUT1, kaua ko te ahotea whakahāora whānui.

He whāiti te mātāpono mahi. Ka taea e te kikorangi metilīni te whakahohe wawe, ā, ka taea hoki te whakamuri i taua whakahohe, i te tango kūhuka mā GLUT1 i ngā pūtau L929, mā te urunga ki te pūtau me tētahi pāhekoheko ki te pūmua. Kāore tēnei e kōrero mō te inisulini, te repe taiaki huka, te huka toto rānei i roto i te kararehe ora. Mō ngā whakamārama o te waikano hei kawe irahiko, tirohia te āhua o te mahi a te kikorangi metilīni hei kawe irahiko. Mō ngā aratohu pānui rangahau pūtau, tirohia me pēhea te pānui i ngā rangahau kikorangi metilīni.

Ngā kiore mate huka: kua rerekē ngā manawa, kāore te huka toto i rerekē

Ka neke ngā rangahau kararehe ki tētahi ariā kē: te manawa mate huka. I whakamahia e ngā rangahau kiore e rua te streptozotocin, he tāoke e whakangaro ana i ngā pūtau beta whakaputa inisulini, ā, ka hanga i tētahi āhuatanga rite ki te mate huka momo 1. Me mōhio ngā kaipānui e rapu ana mō te kikorangi metilīni me te mate huka momo 2 ki tēnei rerekētanga mai i te tīmatanga. Ehara ēnei i te kararehe mate huka momo 2.

I te rangahau wā roa, i whiwhi ngā kiore tāne Lewis i te 10 mg mō ia kg ia rā mā te wai inu mō te 11 wiki, me ngā horopeta iti o te inisulini hei ārai i te tūpuhi haere, engari kāore i whakahoki i te kūhuka ki te taumata noa. I roto i ngā mitokonoria o te manawa, i āwhina te waikano ki te whakahāora i te NADH, i whakapiki i te NAD+, ā, i whakapiki hoki i te mahi deacetylase a Sirtuin 3. I kitea e te tātari pūmua he iti iho te tāpiritanga acetyl i ngā wāhi 83 i runga i ngā pūmua mitokonoria 34, puta noa i te whakahāora ngako, te huringa waikawa citric, me te kawe irahiko. I heke te whakahāora ngako mekameka roa me te mahi a hydroxyacyl-CoA dehydrogenase; i whakamāramatia tēnei hei whakangāwari i te tino whakawhirinakitanga pūmau o te manawa mate huka ki te ngako. I pai ake ngā rōrahi me te hautanga pana toto, ā, i hoki tētahi tohu o te whakanuinga manawa ki te taumata noa, ahakoa i noho iti tonu ngā pēhanga me te tere kōpeke.

Anei te hua tino hira: kāore te taumata kūhuka toto i neke. I noho teitei tonu te kūhuka i te wā nohopuku me te wā kāore i nohopuku, ā, i noho te HbA1c ki te tata ki te 5.6 ōrau i ngā kiore mate huka i whiwhi maimoatanga me ērā kāore i whiwhi, kāore he pānga maimoatanga whai tikanga ā-tauanga. Kāore hoki te waikano i whakatika i te hapa hāngā o ngā matatini I me II i ngā mitokonoria kua wehea. I pai ake te mahi manawa i ētahi inenga, engari kāore te whakahaere kūhuka me te hapa hāngā matua i pai ake. I noho motuhake tonu ngā putanga motuhake.

He iti ake te taumata i whāia e te rangahau tuarua: ngā mitokonoria i wehea mai i ngā manawa hauora me ngā manawa kua rua marama e pāngia ana e te mate huka, ā, i hoatu tētahi horopeta iti kotahi o te 0.1 micromolar i te wā o te ine. I piki te pau hāora me ngā tïpako o te matatini I me te matatini II. Engari i rerekē te tukunga hauwai peroxide i runga i te wahie: i piki me te glutamate me te malate, i heke me te succinate. Kāore te pupuri konupūmā i rerekē. He rangahau mātai rongoā mitokonoria tēnei, ehara i te whakamātautau mahi manawa, kūhuka rānei. Ko tōna akoranga, ehara te waikano i te ārai whakahāora he ōrite tonu tōna mahi. Kei te momo tïpako e tahuna ana e te mitokonoria te tikanga ka piki, ka heke rānei te tukunga matū whakahāora. Mō ngā kōrero e pā ana, tirohia te kikorangi metilīni i ngā rangahau manawa me ngā ia toto.

Te ripanga tauira me ngā inenga putanga: he aha i whakamātauria, he aha i panoni, he aha kāore i panoni

Ngā tāngata: he tata ki te kore ngā taunakitanga mō te kūhuka toto i te tangata

Ka taea e tētahi whakamātautau te rangahau i ngā patunga o ngā tāngata mate huka me te kore e rangahau i te whakahaere kūhuka. Ka taea hoki e tētahi tukanga niho te pūrongo i te HbA1c hei inenga tāpiri, me te kore e whakamātautau i tētahi maimoatanga mate huka.

Kei te whakamahere tētahi whakamātautau kua rēhitatia, NCT05850611, ki te tuku kikorangi metilīni mā te waha (70 mg i roto i te miraka, e whā wiki) mō te whewhe waewae mate huka. Kei roto i ngā inenga te kūhuka i te wā nohopuku, te inisulini me te HbA1c, engari kāore anō kia whakaputaina he hua. I whakakotahi tētahi rangahau tōmua iti kua whakaputaina i te rā pia toto whai mōtepe toto nui me te waikano horopeta iti mā te waha mō te whewhe waewae. I pūrongotia ngā putanga mō te patunga me te whakawhiwhinga hāora, kaua ko ngā putanga kūhuka toto. I ngā whakamātautau niho i whakamahia ai te waikano ki tētahi wāhi anake hei patu moroiti ka whakahohea e te rama, mō ngā tūroro he mate kiko tautoko niho, he mate huka hoki, kāore i kitea he painga HbA1c whai tikanga ā-tauanga. He ariā rerekē te waikano kei roto i te pūkoro pae niho i te maimoatanga pākia mō te tinana whānui, nō reira kāore hoki aua hua kore e kōrero mō te hoatutanga horopeta mā te waha.

Te whakarāpopototanga pono: kāore he taunakitanga tangata kua whakaputaina e whakaatu ana ka whakapai ake te kikorangi metilīni ka tukuna ki te tinana whānui i te HbA1c, i te kūhuka i te wā nohopuku, i te inisulini rānei i te mate huka. Ehara te korenga o ngā taunakitanga i te tohu kāore he pānga, engari ka whakahē i ngā whakatairanga e whakaatu ana i te tango kūhuka a ngā pūtau, i ngā kitenga manawa kiore rānei, hei taunakitanga mō te whakahaere kūhuka. Mō ngā herenga haumaru i mua i te whakamātau a te tangata, tae atu ki te mōrea o te mate serotonin ina whakamahia me ngā rongoā ārai pōuritanga noa, tirohia te haumaru o te kikorangi metilīni me ngā pāhekoheko rongoā.

Me pēhea te whakamahi i ēnei taunakitanga me te kore e whakapohehe i a koe anō

Whakaarohia ngā pūrere e toru. Ko te pūrere tuatahi he kūaha kūhuka i tētahi pūtau kotahi kua whakatipuria. Ko te pūrere tuarua he mitokonoria i roto i te manawa kiore. Ko te pūrere tuatoru he tangata mate huka, me tōna repe taiaki huka, tōna ate, ōna uaua, ōna tākihi, āna rongoā me āna kai. Kua whakaaturia ka pā te waikano ki ngā pūrere tuatahi me te tuarua. Kāore anō kia whakaaturia ka urupare te pūrere tuatoru mā te whakahaere kūhuka pai ake.

Ko taua rerekētanga te ngako o te tuhinga i roto i te kōwae kotahi. Ki te tautoko tētahi kerēme mō te kikorangi metilīni i te tiaki mate huka mā te tohu ki te whakahohe pūkawe, ki te tāpiritanga acetyl ki ngā mitokonoria rānei, kaua ki tētahi inenga putanga kūhuka toto, kua whakawhiti taua kerēme ki tētahi kaupapa kē. He mea tika tonu kia arohia ngā kitenga mō te Sirtuin 3 me te whakahāora ngako, engari he tino motuhake te whakamātautau hei tatari: he whakamātautau whai rōpū whakahaere i ngā tāngata mate huka, e ine ana i te HbA1c, i te kūhuka i te wā nohopuku, i te inisulini rānei hei putanga matua.