Tiyeni tiphunzire za Antibody-Drug Conjugates (ADCs) - 'chipolopolo chamatsenga' chomwe chimapeza maselo a khansa ndikupereka mankhwala?

Tikamanena kuti "khansa", mawu amodzi omwe amafika m'maganizo mwathu nthawi yomweyo ndi "chemotherapy". Anthu ambiri amaopa chithandizochi chifukwa chimayambitsa kutayika kwa tsitsi ndipo ndi chovuta kwa thupi. Komabe, ndi kupita patsogolo kwa sayansi ya zamankhwala, njira zatsopano zayambitsidwa padziko lonse lapansi zomwe zitha kungoyang'ana maselo a khansa ndikuchepetsa kwambiri kuwonongeka kwa maselo athanzi. Lero, tikambirana za njira yochizira yomwe yapanga chitukuko chachikulu mdziko la chithandizo cha khansa, ndipo imagwira ntchito ngati 'chipolopolo chamatsenga'. Izi ndi Antibody-Drug Conjugates, kapena ADCs monga momwe timazitchulira mwachidule.

Mwachidule, kodi Antibody-Drug Conjugate (ADC) iyi ndi chiyani?

Tangoganizirani, muyenera kupereka phukusi kwa munthu m'modzi yekha pamalo odzaza anthu. Kodi zingakhale zosavuta bwanji kupeza munthuyo ndikutumiza phukusi m'malo molipereka kwa aliyense? Ndicho chimene ADC iyi imachita.

ADC ndi kuphatikiza kwa magawo atatu. Kunena zoona, ili ngati 'bomba lanzeru' lopangidwa ndi ukadaulo.

1. Antibody: Ichi ndi 'chodziwitsira' chathu. Pali mapuloteni apadera (omwe timawatcha "ma antigen a chotupa") omwe amapezeka pamwamba pa maselo a khansa okha. Antibody iyi imapangidwa kuti igwire ntchito yomamatira ku mapuloteni omwe ali pa maselo a khansa. Ili ngati kiyi yomwe imalowa mu loko yake yofanana. Popeza maselo athanzi alibe mapuloteni awa, antibody iyi siimamatira kwa iwo. Chifukwa awa amapangidwa mwapadera m'ma laboratories, timawatchanso kuti "Monoclonal Antibody".

2. Mankhwala a Chemotherapy: Ichi ndi chomwe chili mkati mwa phukusili. Chimagwiritsa ntchito mankhwala amphamvu kwambiri oletsa khansa kuposa omwe amaperekedwa mu chemotherapy wamba. Chifukwa chakuti chimalowa mwachindunji mu selo ya khansa, chingapereke mankhwala amphamvu popanda kuvulaza maselo athanzi omwe ali kunja.

3. Cholumikizira: Ichi ndi 'chingamu' chomwe chimagwirizanitsa spy (Antibody) ndi bomb (mankhwala a Chemo). Ntchito ya cholumikizira ichi ndikuletsa mankhwalawo kuti asatuluke mpaka antibody itapeza selo la khansa ndikulowamo. Pambuyo poti selo la khansa lalowa, cholumikizira ichi chimasweka, ndikutulutsa mankhwalawo.

Kodi 'chombo chamoyo' ichi chimagwira ntchito bwanji?

Njirayi ndi yosangalatsa kwambiri. Tiyeni tiwone zomwe zimachitika pang'onopang'ono.

• Gawo 1: Mankhwala a ADC amalowetsedwa m'mitsempha ya wodwalayo kudzera mu saline solution.
• Gawo 2: Mankhwalawa amayenda m'thupi lonse kudzera m'magazi. Komabe, pamene akuyenda, gawo la antibody limagwira ntchito ngati GPS, pofufuza komwe kuli maselo a khansa.
• Gawo 3: Kachilombo ka khansa kakapezeka, chitetezo cha mthupi chimalowa m'thupi ndipo chimatseka puloteni inayake (antigen) pamwamba pa seloyo.
• Gawo 4: Ikatsekedwa motere, selo la khansa limaganiza kuti likufuna izi, kotero limakoka phukusi lonse la ADC mkati mwake.
• Gawo 5: Akalowa mu selo ya khansa, ma enzyme omwe ali mkati mwake amaswa 'linker' imeneyo.
• Gawo 6: Pamene cholumikizira chikusweka, mankhwala amphamvu kwambiri a chemotherapy omwe anali omangiriridwa nawo amatulutsidwa mkati mwa selo la khansa.
• Gawo 7: Chifukwa cha mphamvu ya mankhwalawa, selo la khansa limawonongeka kuchokera mkati.

Ndi mitundu iti ya khansa yomwe imachiritsidwa ndi ADC?

ADC si mankhwala a mitundu yonse ya khansa. Pakadali pano, madokotala amaganizira za chithandizo ichi cha mitundu ina ya khansa, makamaka pamene njira zina zalephera (`(khansa yotsutsa)`), khansa yabwerera (`(yabwereranso)`), kapena yafalikira ku ziwalo zina za thupi (`(metastasize)`).

Tiyeni tifotokoze izi mozama mu tebulo ili m'munsimu.

Mankhwala angapo a ADC omwe amagwiritsidwa ntchito padziko lonse lapansi

Pali kale mankhwala oposa khumi ndi awiri a ADC omwe avomerezedwa ndi mabungwe monga FDA ku United States. Zitsanzo zina ndi izi:

• Brentuximab vedotin (Adcetris®): Amagwiritsidwa ntchito pa khansa ya m'magazi monga Hodgkin lymphoma.
• Trastuzumab emtansine (Kadcyla®): Imagwiritsidwa ntchito pa khansa ya m'mawere ya HER2 yomwe yafalikira mthupi lonse.
• Sacituzumab govitecan (Trodelvy®): Amagwiritsidwa ntchito pa khansa ya m'mawere yokhala ndi ma triple-negative ndi khansa ya chikhodzodzo.

Kodi palibe zotsatirapo zoyipa za mankhwalawa?

Ngakhale kuti akuti "kuwononga maselo athanzi ndi kochepa", izi sizikutanthauza kuti palibe zotsatirapo zoyipa za chithandizochi. Komabe, poyerekeza ndi mankhwala a chemotherapy okhazikika, nthawi zambiri izi zimatha kuthetsedwa. Zotsatirapo zomwe zimachitika zimatha kusiyana malinga ndi wodwala aliyense, kutengera mtundu wa khansa, gawo lake, komanso thanzi la wodwalayo.

Gulu lanu la oncology lidzakuyang'anirani mosamala nthawi yonse ya chithandizo chanu. Ngati pali zotsatirapo zilizonse zoyipa, adzakupatsani chithandizo mwachangu.

Zotsatira zoyipa zofala:

• Kutopa
• Kusanza ndi kusanza
• Kuchepa kwa magazi m'thupi
• Leukopenia (kuchepa kwa maselo oyera m'magazi)
• Kuchuluka kwa ma platelet m'magazi (`(Thrombocytopenia)`)
• Kusowa kwa chakudya chokwanira
• Kudzimbidwa kapena kutsegula m'mimba
• Mutu, malungo
• Matenda a m'mitsempha ya m'mapazi - dzanzi ndi kumva kuwawa m'miyendo
• Kutupa pakhungu

Ndikofunikira kwambiri kuuza dokotala wanu nthawi yomweyo za chilichonse mwa zinthuzi, ngakhale zitakhala zazing'ono.

Kodi tingakhale ndi chiyembekezo cha chithandizochi?

Inde, ndithudi. ADC ndi chithandizo chomwe chabweretsa chiyembekezo chatsopano kwa odwala ambiri a khansa. Kafukufuku wasonyeza kuti odwala omwe amalandira chithandizo cha ADC amakhala ndi moyo wautali kuposa omwe amalandira chithandizo chamankhwala chokhazikika chokha.

Ndipo gawoli likukula mofulumira kwambiri. Pakadali pano, mayeso azachipatala opitilira 100 akuchitika padziko lonse lapansi. Asayansi akuyesera kupanga ma ADC omwe ndi othandiza kwambiri komanso omwe alibe zotsatirapo zoyipa pa mitundu yambiri ya khansa. Chifukwa chake, tikukhulupirira kuti mtsogolomu, tidzakhala ndi mwayi wopeza chithandizo cha 'matsenga' cha mitundu yambiri ya khansa.