Yadda methylene blue ya bambanta da sinadaran hana oxidation na gargajiya

Sinadarin hana oxidation na gargajiya yana haɗuwa da radikal mai 'yanci sau ɗaya kacal. Yana bayar da electron, ya kawar da tasirin abin da ya nufa, sannan ya ƙare. Lissafin ɗaya-da-ɗaya ne, kuma kariyar tana tsayawa idan sinadarin ya ƙare.

Methylene blue ba ya aiki haka. Yana karɓar electrons, ya miƙa su gaba, sannan ya koma siffarsa ta asali, a shirye ya sake zagayawa. Kwayar sinadari guda ɗaya za ta iya yin aiki dubban sau. Wannan bambancin yana bayyana ƙarfin aikinsa a ƙananan adadi da kuma gazawarsa da ta fi ba da darasi. Abin da ke gaba yana kwatanta hanyoyin aikin biyu ta hanyar bincike uku da aka wallafa, tare da kula da sakamakon da bai nuna tasiri ba.

Mai miƙawa ne, ba soso ba

Wannan tsarin sinadarai ya ƙunshi siffofi biyu masu iya komawa juna. Methylene blue da aka yi wa oxidation shuɗi ne, yana da cajin lantarki, kuma yana narkewa a ruwa. Methylene blue da ya karɓi electrons, wanda ake kira leuco-methylene blue, ba shi da launi ko cajin lantarki, kuma yana narkewa a kitse yadda zai iya ratsa membranes cikin sauƙi. A cikin mitochondrion, rinin da aka yi wa oxidation yana karɓar electrons daga masu ɗaukar su da ke da alaƙa da NADH a farkon hanyar, sannan ya kai su ga cytochrome c da complex IV a ƙarshen hanyar. Hakan yana tsallake complexes I zuwa III, waɗanda su ne wuraren da electrons suka fi zubewa zuwa oxygen su samar da superoxide. Rinin yana fitowa a siffar da aka yi wa oxidation, sannan ya maimaita zagayen. An yi bayanin yadda waɗannan siffofi biyu suke aiki a bayanin yadda methylene blue yake aiki.

Mai kawar da radikal kai tsaye yana aiki ne bayan zubewar ta faru. Yana jira superoxide ko peroxide ya samu, sannan ya kawar da tasirinsa, kwayar sinadari guda ɗaya ga kowane radikal. Mai maimaita zagayen redox yana aiki kafin zubewar, yana sauya hanyar kwararar electrons domin a samar da superoxide kaɗan, ba tare da shi kansa ya ƙare ba. Lissafin adadin sinadarin ya biyo wannan: a binciken da ke ƙasa, methylene blue yana aiki kusa da 100 nanomolar, yayin da mai kawar da radikal na gargajiya yake buƙatar 100 micromolar.

Sai dai mai miƙawa ba ya yin komai shi kaɗai. Abin da yake yi ya dogara da masu bayarwa da masu karɓa a kowane ƙarshen hanyar. Idan tsarin ya sauya, kwayar sinadarin nan ɗaya za ta iya ba da kariya, ta zama marar amfani, ko kuma ta zama ba ta da alaƙa da abin da ke faruwa.

Ƙwayoyin jijiyoyi: kariyar da ke buƙatar mitochondria masu aiki

Binciken da ya fi ware wannan bambanci a sarari shi ne nazarin alaƙar tsarin kwayar sinadari da aikinta a ƙwayoyin jijiyoyin hippocampus na HT-22. An gwada methylene blue da sinadarai shida masu alaƙa da shi a kan abubuwa huɗu masu lalata ƙwayoyin halitta (Poteet da abokan aikinsa, 2012). A kan glutamate, rotenone (mai toshe complex I), da iodoacetate, rinin ya ba da kariya a matakan nanomolar. A kan glucose oxidase, wanda yake samar da hydrogen peroxide kai tsaye a ruwan renon ƙwayoyin halitta, bai yi komai daga 10 nanomolar zuwa 10 micromolar ba, yayin da pyruvate, mai kawar da radikal mai sauƙi, ya ba da kariya. Inda matsalar take lalacewar sarkar jigilar electrons, mai miƙawar yana taimakawa. Inda peroxide ya riga ya samu a wajen ƙwayar halitta, babu abin da zai ɗauka.

Binciken nan ya kuma nuna dalilin hakan. A gwajin haɗin mitochondria da aka farfasa, sinadarai biyu masu alaƙa da methylene blue waɗanda ba su da sarkokin gefe a wurare 3 da 7, phenothiazine da 2-chlorophenothiazine, sun yi aiki da kansu a matsayin masu hana oxidation kai tsaye. Methylene blue bai yi haka ba. Ya dakatar da oxidation ne kawai lokacin da NADH da kayan mitochondria da ba su lalace ba suka kasance tare. Wato, sam ba kawar da radikal yake yi ba. Jigila yake yi, kuma mai jigilar yana buƙatar wurin ɗaukar kaya da kuma inda zai kai su.

Abubuwa biyu sun ƙara fayyace hoton. Ƙara sarkar gefe ga nitrogen na zoben sinadarin a wuri 10 ya rage ƙarfin kariyar da kusan ninki dubu, yana nuna cewa nitrogen ɗin da ba a ɗaure masa wannan sarkar ba shi ne muhimmin ginshiƙin tsarin zagayen sinadarin. Haka kuma, dogon kasancewa tare da sinadarin ya ƙara samarwa da aikin complex IV, wani sauyin daidaitawa da sinadaran danginsa masu kawar da radikal kai tsaye ba su haifar ba. Ƙarin bayani kan jigilar electrons a mitochondria yana ba da tushen tantance ikirarin hana oxidation.

Ƙwayoyin fata: kwatancen kai tsaye da methylene blue ya yi nasara a ciki

Wani bincike dabam ya kwatanta methylene blue da sanannun sinadaran hana oxidation guda uku a ƙwayoyin fibroblast na fatar ɗan Adam da aka ɗauko kai tsaye daga masu bayarwa masu lafiya, masu cutar progeria, da masu bayarwa da suka haura 80 (Xiong da abokan aikinsa, 2017). Tsawon makonni huɗu, an yi amfani da methylene blue a 100 nanomolar, N-acetylcysteine a 100 micromolar, da MitoQ da mito-TEMPO a 100 nanomolar kowannensu.

Bambancin sakamakon ya yi yawa. Methylene blue ya rage superoxide a mitochondria kuma ya taimaka wa ƙwayoyin halitta yawaita a duk jerin ƙwayoyin da aka gwada. N-acetylcysteine bai rage ROS na mitochondria ba, kuma ya bayyana kamar yana rage saurin yawaitar ƙwayoyin. MitoQ, a adadin da ake amfani da shi bisa wallafe-wallafen bincike, ya ƙara ROS na mitochondria sosai kuma ya hana yawaitar ƙwayoyin. Mito-TEMPO ya nuna ɗan amfani a wasu jerin ƙwayoyin. Daga cikin huɗun, mai maimaita zagaye a matsayin mai hanzarta amsawar sinadarai ya fi tasiri, yayin da sinadarin hana oxidation mai aiki bisa gwargwadon adadin kwayoyinsa, wanda aka nufa ga mitochondria, ya ma fi rashin amfani da komai muni—aƙalla a cikin wannan tsarin yayin amfani na tsawon wata guda.

Marubutan sun nuna tsawon lokacin a matsayin dalili mai yiwuwa, domin gajerun lokutan amfani da MitoQ a wasu binciken sun nuna sakamako mafi kyau. Wannan abin lura ya shafi wasu yanayi ma: sinadaran hana oxidation masu aiki bisa gwargwadon adadin kwayoyinsu suna ƙarewa, kuma abubuwan da suke samarwa yayin rushewa na iya yin illa idan an bar su tare da ƙwayoyin halitta na dogon lokaci. Mai hanzarta amsawar sinadarai ba ya ƙarewa.

An faɗaɗa wannan shirin bincike zuwa fatar ɗan Adam ta 3D da aka sake gina wa, inda ƙaramin adadin methylene blue ya ƙara kaurin dermis, ya inganta riƙe ruwa, ya ƙara elastin da collagen 2A1, ya rage MMP9, kuma ya hanzarta rufewar rauni. Wannan abin ƙarfafa gwiwa ne, amma ya shafi fata ne, kuma fata ba ƙashi ba ce.

Ƙashi: abin da ya ba da fata a farantin ƙwayoyin halitta ya ɓace a dabba

Binciken tsufan tsarin ƙasusuwa yana wakiltar ɗayan ƙarshen wannan bambancin sakamako (Poudel da abokan aikinsa, 2024). A renon ƙwayoyin halitta, methylene blue da MitoQ duk sun hana samuwar osteoclasts gwargwadon ƙaruwa a adadinsu sama da 0.25 micromolar, ba tare da cutar da ikon ƙwayoyin tushe na rayuwa ko samuwar osteoblasts ba. Idan mai bincike ya karanta waɗannan hotunan sakamako kaɗai, zai yi hasashen ƙasusuwa masu ƙarfi a dabbobin da aka ba sinadaran.

Sakamakon dabbobin ya saɓa da wannan. An ba tsofaffin ɓeraye mata na C57BL/6J methylene blue a 250 micromolar cikin ruwan sha na tsawon 6 ko 12 watanni. An ba ɓerayen UM-HET3 masu bambancin gado methylene blue a 28 ppm cikin abinci daga 7 zuwa 22 watanni, ko MitoQ a 100 ppm daga 4 zuwa 22 watanni. Gwajin Micro-CT na ƙashin cinya, a ɓangaren cortical da trabecular, da kuma ƙasusuwan kashin bayan ƙasan baya, ya nuna cewa raguwar ƙashi da ke da alaƙa da shekaru ta ci gaba iri ɗaya a rukunin da aka ba sinadaran da rukunin kwatance. Nau'o'in ɓeraye biyu, hanyoyin bayarwa biyu, sinadaran hana oxidation biyu, watanni na kasancewa tare da su, babu tasiri ga tsarin ƙasusuwa.

Kammalawar marubutan a bayyane take: rage damuwar oxidation da sinadarin hana oxidation shi kaɗai ya bayyana bai isa ya rage saurin tsufan tsarin ƙasusuwa ba. Raguwar ƙashi tana tattare da tasirin hormones, nauyin da ƙashi ke ɗauka, kumburin martanin jiki, da kawar da ƙwayoyin halitta da suka tsufa. Gyara zubewar electrons yana magance dalili guda ɗaya cikin da yawa, kuma a nan sauran dalilan ne suka fi rinjaye. Bayani kan yadda dabarun hana oxidation suka yi a kan alamomin tsufa yana taimakawa wajen fahimtar wannan sakamakon da bai nuna tasiri ba.

Karanta binciken uku tare

Abubuwa uku suna nan daram bayan duba duk takardun binciken uku.

Na farko, hanyar aiki tana nuna iyakar tasiri. Methylene blue yana taimakawa inda electrons suka bi hanyar da ba ta dace ba a cikin mitochondria kuma mai jigila zai iya sauya musu hanya. Yana gazawa inda sinadaran da ke haifar da oxidation suka riga suka samu kuma suke nesa da sarkar. Rashin tasiri a gwajin glucose oxidase da na ƙashi ba abubuwan kunya ba ne da za a nemi uzurin kau da su. Suna nuna ka'idar tana aiki yadda aka bayyana ta.

Na biyu, lissafin aikin mai hanzarta amsawar sinadarai ya fi lissafin aikin sinadarin da yake ƙarewa gwargwadon yawan abin da yake kawarwa, idan aka yi amfani na dogon lokaci. Kwayar sinadarin da ba ta ƙarewa tana ci gaba da aiki a matakan nanomolar na tsawon makonni, yayin da masu kawar da radikal sau ɗaya suke buƙatar adadi a matakin ɗaruruwan micromolar kuma za su iya sauyawa zuwa yin illa idan an bar su tare da ƙwayoyin halitta na dogon lokaci.

Bayanan adadin sinadari, hanyar bayarwa, da yadda yake rarrabuwa a kyallen jiki suna bayyana wani ɓangare na dalilin da ya sa sinadarin da ya fi tasiri a matakin nanomolar a renon ƙwayoyin halitta zai iya zama marar tasiri a cikin halitta mai rai.

Ga likitoci da masu bincike, abin da wannan ke nufi yana da iyaka amma tabbatacce ne. Methylene blue ba sinadarin hana oxidation mafi ƙarfi ba ne, sai dai wani rukuni dabam: mai jigila da yake komawa siffarsa ta asali, wanda ke buƙatar mitochondria marasa lalacewa, masu bayar da electrons da suke samuwa, da mai karɓa a ƙarshen hanyar. A tantance kowane amfani da aka ba da shawara ta hanyar tambayar ko wannan da'irar tana akwai a kyallen jikin da aka nufa, tare da neman gwajin kwatancen da binciken Poteet ya yi: gwajin peroxide kai tsaye wanda mai kawar da radikal na gaskiya yake cin nasara a cikinsa, amma mai jigila ya kamata ya gaza. Wannan ne kuma dalilin da ya sa kwatancen sinadarai masu aiki a redox da masu bincike ke jagoranta suke komawa ga tsare-tsaren kwatanta su kai tsaye.

Majiyoyi

Kwatance ukun da ke sama sun fito ne daga binciken alaƙar tsarin kwayar sinadari da aikinta na methylene blue da sinadarai shida da aka samo daga gare shi a ƙwayoyin jijiyoyi, kwatancen sinadaran hana oxidation guda huɗu a fibroblasts na fatar ɗan Adam da samfuran fata na 3D, da binciken dogon lokaci na methylene blue da MitoQ kan tsufan tsarin ƙasusuwa a nau'o'in ɓeraye biyu. Wannan labarin yana ba da rahoton sakamakonsu ne, ba ya bayar da shawarwarin jiyya.