I-Thrombopoietin (TPO) iyihomoni ebalulekile ye-glycoprotein eyingxenye enkulu ekulawuleni ukukhiqizwa kwamaplatelet emzimbeni womuntu. Inendima enkulu kwezempilo ngokugcina ukulingana kwamaplatelet, okubalulekile ekujiyeni kwegazi okujwayelekile nasekupholisweni kwamanxeba. Amaplatelet ayizicucu zamaseli ezincane, ezingenayo i-nucleus, ezivela kuma-megakaryocyte emnkantsha, futhi ukukhiqizwa kwawo okwanele kuvimbela ukuphuma kwegazi ngokweqile futhi kusekela ubuqotho bemithambo. Ukuqonda indlela i-thrombopoietin esebenza ngayo kubalulekile ekuthuthukiseni imikhuba yokwelapha ezobhekana nezinkinga zamaplatelet ezifana ne-thrombocytopenia, isimo esibonakala ngokuba nenani eliphansi kakhulu lamaplatelet.

Ithuthukiswa ikakhulukazi isibindi nezinso, i-thrombopoietin isebenza njengesikhuthazi esiyinhloko sokwanda nokuhlukana kwama-megakaryocyte. Ukutholwa kwayo kushintshe kakhulu indlela yokwelapha izifo ezihlukahlukene zegazi, ikakhulukazi lezo ezihlanganisa ukungasebenzi kahle kokukhiqizwa kwama-platelet. I-hormone yenza imisebenzi yayo ngokubopha ku-receptor ye-c-Mpl kumangqamuzana esiqu egazini kanye nama-megakaryocyte progenitors, okubangela uchungechunge lwezindlela zokuxhumana ngaphakathi kwamangqamuzana. Le ndlela isiza ukukhuthaza ukuvuthwa kwama-megakaryocyte kanye nokukhishwa kwama-platelet emva kwalokho emjikelezweni wegazi.

Ngenxa yendima yayo ebalulekile, i-thrombopoietin ihehe intshisekelo enkulu kwezokwelapha nokucwaninga, ikakhulukazi ngendlela yayo eyenziwe ngobunhloli njenge-agent yokwelapha. Izinkampani ezifana neStellar Biotech Limited ziye zaqala ukuthuthukiswa nokuthengiswa kwe-recombinant human thrombopoietin (rhTPO), ebizwa nge-TPIAO, enikeza ukwelashwa okusha kweziguli ezine-thrombocytopenia. Lesi sihloko sihluza indlela i-thrombopoietin esebenza ngayo, ukubaluleka kwayo kwezokwelapha, kanye neziqondiso ezithembisayo zesikhathi esizayo ekucwaningeni kwe-thrombopoietin.

Inqubo ye-thrombopoietin iqala lapho i-TPO ibopha khona ngokukhethekile ku-receptor yayo, i-c-Mpl, etholakala ebusweni bamangqamuzana esiqu esakhiwa igazi (hematopoietic stem cells) kanye namangqamuzana angaphambi kwe-megakaryocyte. Lokhu kusebenzisana kuvula izindlela zokudlulisa isignali ezifana ne-JAK/STAT, MAPK, kanye ne-PI3K, ezikhuthaza ukusinda kwamangqamuzana, ukwanda kwawo, kanye nokuhlukana kwawo. Umphumela ukwanda kwenani kanye nekhono lokusebenza lama-megakaryocyte emnkomeni (bone marrow).

Ama-megakaryocyte adlula engozini ebizwa nge-endomitosis, lapho ukuphindeka kwe-DNA kwenzeka ngaphandle kokuhlukana kwamaseli, okuholela ku-polyploidy, okuthuthukisa ikhono lawo lokukhiqiza ama-platelet. Njengoba ama-megakaryocyte evuthwa, andisa izindlela ze-proplatelet emingceleni ye-bone marrow sinusoids, ekhulula ama-platelet egazini. I-Thrombopoietin ayikwandisi nje kuphela inani lama-megakaryocyte kodwa futhi ithuthukisa i-ploidy yawo kanye nokusebenza kahle kokukhulula ama-platelet.

Ngaphezu kwalokho, i-thrombopoietin ilawula isikhathi sokuphila kwamaplatelet ngomshikashika wokubuyisela emuva. Amaplatelet ajikelezayo abopha futhi afake i-TPO ngaphakathi, alawula ukutholakala kwayo. Lapho izibalo zamaplatelet ziphansi, i-TPO yamahhala ethe xaxa iyatholakala ukuze ikhuthaze ukukhiqizwa, futhi lapho izibalo zamaplatelet ziphakeme, amazinga e-TPO ayancipha. Lo mshikashika ohlakaniphile ugcina i-platelet homeostasis ebalulekile ku-hemostasis. Ukuqonda lo mshikashika kusiza odokotela nabacwaningi ukuthi bakhe imithi eqondile yokuphazamiseka kokukhiqizwa kwamaplatelet.

I-Thrombocytopenia yinkinga ejwayelekile yezokwelapha ebangelwa ukwehla kokukhiqizwa kwamaplatelet, ukubhujiswa okwandayo, noma ukugcinwa kwawo. Kubeka ingozi enkulu yokopha, ikakhulukazi ezigulini ezithola ukwelashwa nge-chemotherapy, ezihlushwa yi-immune thrombocytopenic purpura (ITP), noma ezibhekana nezifo zokwehluleka komnkantsha. I-Thrombopoietin nemidala yayo isibalulekile ekwelapheni lezi zimo ngokukhuthaza ukukhiqizwa kwamaplatelet ngempumelelo.

I-Recombinant human thrombopoietin (rhTPO) ibonise ukusebenza kahle okumangalisayo ezindaweni zezokwelapha, ikakhulukazi i-thrombocytopenia ebangelwa yi-chemotherapy. Isheshisa ukululama kwamaplatelet futhi yehlisa isidingo sokudluliselwa kwamaplatelet, ithuthukisa izinga lempilo leziguli kanye nemiphumela yokwelashwa. Ngaphezu kwalokho, i-rhTPO ilusizo njengokwelashwa okungeziwe ezigulini ze-ITP ezingaphenduli kuma-corticosteroids, kusiza ukukhuphula izinombolo zamaplatelet nokunciphisa izikhathi zokuopha.

I-TPIAO yeStellar Biotech Limited ingumkhiqizo omusha we-rhTPO okhonjiswe kulezi zicelo. Indlela yayo eqondisiwe ithuthukisa ukukhiqizwa kwamaplatelet ngenkathi inciphisa imiphumela emibi, okwenza kube ukwengeza okubalulekile emithini ye-hematology. Ukuhlanganiswa kwezindlela eziphambili ezinjalo kuhambisana nokuzibophezela kweStellar Biotech ekuhlinzekeni ngezixazululo zamaphilisi ezisezingeni eliphezulu ezihambisana nezidingo zemakethe, ezingahlolwa kabanzi ku-Imikhiqizoikhasi.

Ukuthuthukiswa kwe-recombinant human thrombopoietin kuvule izindlela ezintsha zokwelapha ngaphandle kokwelashwa kwendabuko kwezinkinga ze-platelet. I-TPIAO, ethuthukiswe yi-Stellar Biotech Limited, ibonisa ukusetshenziswa okusha kwe-rhTPO ekuphatheni i-thrombocytopenia ebangelwa yizimbangela ezahlukene. Ubulukhuni bayo be-recombinant buqinisekisa ukuhleleka okuphezulu nokusebenza kahle, kuhlinzeka ngezinsizakalo ezihambisanayo kubaguli.

Ngaphandle kwe-thrombocytopenia ebangelwa yi-chemotherapy ne-ITP, i-rhTPO iyahlolwa ukuze isetshenziswe ezindaweni zabantwana, ikakhulukazi ezinganeni nasezintsheni ezibhekene ne-chronic immune thrombocytopenic purpura. Lokhu kukhuluza umkhakha wezinketho zokwelapha kugxile ekuvikelekeni nasekusebenzeni kahle. Ngaphezu kwalokho, i-rhTPO inamandla ekunakekeleni okusekela kubaguli abahamba phambili ekudluliseleni amaseli e-hematopoietic stem, kusiza ukusheshisa ukuvuselelwa kwe-platelet ngemuva kokudlulisela.

Ucwaningo olusathuthukayo luphinde luhlolisise izindlela zokwelapha ezihlanganisiwe lapho i-rhTPO isetshenziswa kanye nezinye izinto ezikhuthaza ukukhula kwegazi ukuze kuthuthukiswe ngokuphumelelayo ukululama kwe-hematologic. Lezi zimpumelelo zikhombisa imvelo eguquguqukayo yocwaningo lwe-thrombopoietin nomzamo oqhubekayo wokuthuthukisa imiphumela yeziguli. Ngemininingwane eyengeziwe ngeziphakamiso namasevisi e-Stellar Biotech asekelayo ubuchule obunjalo, vakashela i-Ukusekela ikhasi.

Izivivinyo zokwelapha ezihlola i-recombinant human thrombopoietin ziye zagcizelela njalo ukuthi iphephile futhi iyasebenza ekukhuthazeni ukukhiqizwa kwamaplatelet. Imiphumela emibi ngokuvamile iyimfihlo futhi ingalawuleka, okuyinto ejwayelekile kakhulu ukubona izindawo zokujova ezidlula ngokushesha kanye nokwanda okuncane kwamaplatelet. Akukho ukubona ukuthi iyadala ukungazwani komzimba, okubaluleke kakhulu ekwelapheni isikhathi eside ezimweni ezingapheli.

Izifundo nge-TPIAO ziye zabika ukuthuthuka okubalulekile ezinombolweni zamaplatelet ezigulini ezine-thrombocytopenia ebangelwa yi-chemotherapy kanye ne-ITP. Amandla okunciphisa ubungozi bokopha nokuncika ekudluliselweni kwamaplatelet kube yinzuzo enkulu kwezokwelapha. Ngaphezu kwalokho, izivivinyo zikhombisa ukuthi i-rhTPO isheshisa ukululama kwe-hematopoietic ngaphandle kokulimaza ukusebenza kwezinhlelo zokwelapha nge-chemotherapy ezihambisanayo, okwenza ilungele ukunakekelwa komdlavuza okuhlanganisiwe.

Lezi ziphumo ziholele ekugunyazweni kwezimiso kanye nokwamukelwa okubanzi kwezokwelapha kwe-rhTPO emtholampilo. Ucwaningo oluqhubekayo luyaqhubeka nokuqapha ukuphepha kwesikhathi eside futhi luphonononge ukusetshenziswa kwalo kwezinye izifo zegazi. I-Stellar Biotech Limited ihlala ingaphambili kulezi zintuthuko, isekela impilo yomhlaba wonke ngokucwaninga okuqinile nokuhlanganiswa komkhiqizo okuhambisana nemithetho, njengoba kuchaziwe ekhasini labo le-Insizakalo.

Ikakhulukazi, ikusasa locwaningo lwe-thrombopoietin lithembisa, ligxile ekuthuthukiseni ukusebenza kwezokwelapha nokwandisa izinkomba zezokwelapha. Ama-agonists amasha esamukeli se-TPO anezici ezithuthukisiwe ze-pharmacokinetics kanye nemiphumela emibi encishisiwe ayakhiwa ukuze ahlinzeke ngamashejuli alula kakhulu kanye nokuhambisana okungcono kweziguli. Ngaphezu kwalokho, izindlela zokwelapha ngemvelo zihlose ukulungisa izinkinga zokuzalwa zokukhiqiza amaplatelet ngokuhlanganisa indlela yokudlulisa isignali ye-thrombopoietin.

Ucwaningo luphinde luhlola indima ye-thrombopoietin kwezinye izinqubo zamajeni ngaphandle kwe-hematopoiesis, njengokulawulwa komgqomo kanye nokulungiswa kwezicubu. Lokhu kungaholela ezinhlelweni ezintsha emithini yokubuyisela emzimbeni nasekuphathweni kwezifo ezihlasela umgqomo. Ukuhlanganiswa kobuhlakani bokwenziwa kanye nokuhlaziywa kwedatha enkulu kuyashesha ukutholwa kwemithi kanye nezindlela zemithi eziqondene nomuntu ezihloswe kumshini we-thrombopoietin.

I-Stellar Biotech Limited ibandakanyeke kakhulu ekukhuthazeni ukubambisana nasekuthuthukiseni ucwaningo ukuze kulethwe imithi elandelayo ye-thrombopoietin emakethe. Ubukhona babo bomhlaba wonke kanye nobuchwepheshe ekuhambisaneni nemithetho kuqinisekisa ukuthi ubuchwepheshe obunjalo buhlangabezana nezindinganiso eziqinile zokuphepha nokusebenza, okuqhubeka nokusekela imiphumela engcono yezempilo emhlabeni wonke. Vakashela i-Stellar Biotech's Ikhayaikhasi ukuze ufunde kabanzi ngomsebenzi wabo kanye nentuthuko.

I-Thrombopoietin ibalulekile ekulawuleni ukukhiqizwa kwamaplatelet, futhi indlela yayo ihlinzeka ngemininingwane ebalulekile ekwelapheni i-thrombocytopenia nezinye izifo ezihlobene nayo. Ukufika kwe-recombinant human thrombopoietin, njenge-TPIAO yeStellar Biotech Limited, kubonisa ukuqhubeka okubalulekile emithini ye-hematology, enikeza izinketho zokwelapha eziphephile neziphumelelayo ezithuthukisa imiphumela yesiguli.

Ngokucwaninga okuqhubekayo, izivivinyo zezokwelapha, kanye nentuthuko yemikhiqizo emisha, imithi esekelwe ku-thrombopoietin cishe izokwandisa umthelela wayo ezifweni zegazi kanye nezifo ezithinta izinhlelo zomzimba. Indlela ehlanganisiwe ye-Stellar Biotech ekuthuthukisweni kwezindakamizwa nokuthengiswa kwawo iqinisekisa ukuthi le mithi ebalulekile ifinyelela iziguli emhlabeni wonke ngendlela ehambisana nemithetho futhi esebenza kahle.

Ochwepheshe bezempilo kanye nabacwaningi abafuna izixazululo eziphelele kwezempilo yegazi nangaphezulu, ukuhlola okunikezwa kanye nobuchwepheshe be-Stellar Biotech Limited kunikeza izinsiza eziwusizo ukusekela ukuthuthukiswa kokunakekelwa kweziguli kanye nesayensi yezokwelapha emisha.