Kev xa tshuaj tiv thaiv kiv puag ncig: Paradigm Hloov ntawm Microneedle Arrays hauv Kev txhaj tshuaj

Kev xa tshuaj tiv thaiv kiv puag ncig: Paradigm Hloov ntawm Microneedle Arrays hauv Kev txhaj tshuaj
Cov lus tseem ceeb: Tshuaj tiv thaiv microneedle thaj + Kev tawg ntawm kev txhaj tshuaj tsis muaj mob thiab thermal stability
Hauv kev ua haujlwm ntawm kev noj qab haus huv thoob ntiaj teb, microneedle tshuaj tiv thaiv thaj ua rau thaj tau hloov kho cov txheej txheem ntawm kev txhaj tshuaj. Cov ntawv xa tawm no -stamp- qhov loj ntawm kev tsim kho thev naus laus zis ingeniously hla lub cev nqaij daim tawv thiab kev puas siab puas ntsws teeb meem ntawm kev txhaj tshuaj ib txwm siv thiab daws lub xyoo pua -cov teeb meem qub ntawm cov tshuaj tiv thaiv kab mob khaub thuas thauj mus los, tshwj xeeb tshaj yog muab cov kev hloov pauv rau kev txhaj tshuaj tiv thaiv hauv cov peev txheej- thaj tsam txwv.
Kev sib txawv ntawm kev siv cov txheej txheem qhia txog kev txawj ntse. Tam sim no, cov tshuaj tiv thaiv kab mob microneedle uas tau nkag mus rau hauv kev sim tshuaj feem ntau poob rau plaub hom: cov tshuaj tiv thaiv microneedles (nrog cov tshuaj tiv thaiv nyob rau hauv lub cev koob), coated microneedles (nrog cov tshuaj tiv thaiv coated ntawm rab koob), hollow microneedles (nrog kua tshuaj tiv thaiv formulations), thiab hydrogel microneedles (nrog rau hydrogel microneedles). Kev sib xyaw ua ke zoo tshaj plaws yog "cov tshuaj tiv thaiv thermal stabilization formula + dissolvable microneedles" - khov- cov tshuaj tiv thaiv qhuav yog tov nrog cov piam thaj stabilizers (trehalose, sucrose), thiab thaum lub sij hawm tsim microneedle, cov suab thaj tsim ib lub iav matrix uas "kho" cov tshuaj tiv thaiv hauv lub xeev ruaj khov. Cov kev sim no tau lees paub tias qhov tshuaj tiv thaiv microneedle no tsuas yog poob 8% ntawm nws lub zog tom qab khaws cia ntawm 40℃rau rau lub hlis, thaum cov tshuaj tiv thaiv ua kua ib txwm ua tsis tau zoo hauv ob lub lis piam hauv tib lub sijhawm.
Immunological mechanism zoo tshaj qhov kev cia siab. Kev txhaj tshuaj intramuscular ib txwm muab cov tshuaj tiv thaiv rau cov leeg nqaij, feem ntau ua rau lub cev tiv thaiv kab mob. Nyob rau hauv sib piv, microneedles xa cov antigens mus rau lub epidermis thiab dermis txheej nplua nuj nyob rau hauv Langerhans hlwb thiab dendritic hlwb. Cov antigen kws tshaj lij no- nthuav tawm cov hlwb zoo ntes cov antigens thiab tsiv mus rau cov qog nqaij hlav, ib txhij ua kom muaj kev tiv thaiv kab mob (antibody ntau lawm) thiab kev tiv thaiv ntawm tes (T-cov lus teb ntawm tes). Cov ntaub ntawv kho mob qhia tau tias cov tshuaj tiv thaiv kab mob khaub thuas microneedle tsim 1.3 npaug ntau dua IgG tshuaj tiv thaiv kab mob titers thiab 1.8 npaug zog CD8+ T- cov lus teb ntawm tes tshaj li kev txhaj tshuaj intramuscular, thiab lub cev tiv thaiv kab mob ntau dua. Rau cov kab mob uas xav tau kev tiv thaiv ntawm tes (xws li tuberculosis thiab HIV), lub tswv yim no tsom rau cov tawv nqaij tiv thaiv kab mob muaj txiaj ntsig zoo.
Tus nqi sib raug zoo ntawm kev txhaj tshuaj tiv thaiv tsis mob yog qhov ntsuas tsis tau. Kwv yees li ntawm 10% ntawm cov pej xeem thoob ntiaj teb raug kev txom nyem los ntawm koob phobia, thiab 20% ntawm cov menyuam yaus tiv thaiv kev txhaj tshuaj tiv thaiv vim ntshai tsam mob. Daim ntawv thov kev paub ntawm microneedle thaj ua rau thaj yog zoo li siv lub band- pab, tsis muaj mob thiab tsis muaj ntshav. Hauv kev tshawb fawb ntau-chaw tshawb fawb hauv 2023-2024 lub caij mob khaub thuas, tus nqi quaj ntawm cov menyuam yaus tau txhaj tshuaj tiv thaiv kab mob khaub thuas microneedle poob los ntawm 65% nrog kev txhaj tshuaj ib txwm mus rau 12%, thiab niam txiv kev txaus siab mus txog 98%. Qhov cuam tshuam loj dua yog nyob rau hauv kev nkag mus tau ntawm kev txhaj tshuaj tiv thaiv - cov neeg ua haujlwm hauv zej zog lossis cov kws saib xyuas neeg mob hauv tsev kawm ntawv, tom qab kev cob qhia yooj yim, tuaj yeem ua haujlwm zoo yam tsis tas yuav tsum muaj cov kws kho mob lossis cov txheej txheem pov tseg kev kho mob. Cov qauv kev kwv yees qhia tau hais tias kev txhawb nqa cov tshuaj tiv thaiv kab mob qhua pias microneedle hauv cov tebchaws tau nyiaj tsawg tuaj yeem txo cov nqi txhaj tshuaj los ntawm 42% thiab nce kev pab them nqi los ntawm 28%.
Qhov nrawm nrawm los teb rau qhov tshwm sim sai sai tau tshwm sim thawj zaug thaum lub sijhawm COVID-19 kis thoob qhov txhia chaw. Cov tshuaj tiv thaiv mRNA ib txwm xav tau -70℃cov kab mob khaub thuas, uas txwv tsis pub lawv muab faib rau thaj chaw deb. Hauv qhov sib piv, cov tshuaj tiv thaiv bivalent microneedle mRNA tsom rau ob qho tib si thawj hom kab mob thiab Omicron variant tseem nyob ruaj khov rau peb lub hlis ntawm 2-8℃nrog rau qib kev ua haujlwm ntawm ntau dua 90%. Ib qho kev tsim ntau tshaj plaws yog "multi-antigen microneedle thaj" - kev sib xyaw antigens tiv thaiv ntau yam sib txawv ntawm 1 cm² thaj, muab kev tiv thaiv dav dav nrog kev txhaj tshuaj ib zaug. Cov tshuaj tiv thaiv kab mob pan-coronavirus microneedle project tau txais nyiaj los ntawm US Lub Tsev Haujlwm Saib Xyuas Kev Tiv Thaiv tau nkag mus rau kev sim tsiaj, txhawm rau muab kev tiv thaiv tus kabmob coronaviruses uas paub thiab tsis paub nrog ib koob.
Kev xa tawm tiag tiag tau ua tiav hauv ntau qhov chaw hauv ntiaj teb. "Microneedle Vaccine Implementation Plan" coj los ntawm WHO tau ua haujlwm hauv tsib lub tebchaws hauv sub-Saharan Africa. Cov tshuaj tiv thaiv kab mob polio microneedle tau muab faib los ntawm cov koom haum saib xyuas kev noj qab haus huv hauv zej zog, thiab tsis pub dhau rau lub hlis, qhov tshuaj tiv thaiv ntawm cov menyuam yaus lub hom phiaj tau nce los ntawm 73% mus rau 91%, tsis muaj qhov raug mob ntawm rab koob. Hauv cov teb chaws Pacific Islands, cov tshuaj tiv thaiv kab mob khaub thuas microneedle xa los ntawm drones npog thaj chaw thaj chaw nyob hauv ob hnub uas yav dhau los siv ob lub lis piam los ua kom tiav cov tshuaj tiv thaiv. Cov tshuaj tiv thaiv microneedle tsim los ntawm Serum Institute ntawm Is Nrias teb hauv 2024 muaj peev xwm txhua xyoo ntawm 500 lab thaj ua rau thaj, thiab cov nqi tsev tau nqis mus rau $ 0.85 (piv txog li $ 1.2 rau cov ntawv txhaj tshuaj).
Cov kev sib tw thiab cov kev daws teeb meem tsom rau kev tswj koob tshuaj thiab loj - teev ntau lawm. Cov tshuaj thauj khoom muaj peev xwm ntawm microneedle yog txwv los ntawm qhov ntim ntawm lub cev koob (feem ntau<1 μL per needle). For vaccines requiring large doses of antigens, such as hepatitis B vaccines, an antigen-adjuvant co-delivery system is needed to enhance immunogenicity and reduce antigen dosage. On the production side, the cost is determined by the precision mold manufacturing and large-scale filling process. The consistency of microneedle height needs to be controlled within ±3%. The latest progress shows that the continuous roll-to-roll production process can increase production efficiency by 20 times, and the unit cost is expected to drop below $0.5.
Los ntawm qhov kev xav ntawm pej xeem kev noj qab haus huv, cov tshuaj tiv thaiv microneedle tsis yog tsuas yog cov khoom tshiab tab sis kuj tseem yuav ua rau muaj kev txhaj tshuaj tiv thaiv tshiab. Qhov tshwm sim yav tom ntej yog tias cov tsev neeg yuav khaws "cov khoom siv tshuaj tiv thaiv kab mob microneedle" (muaj ntau yam tshuaj tiv thaiv menyuam yaus) hauv tsev thiab tus kheej - tswj hwm cov tshuaj tiv thaiv raws li kev taw qhia ntawm cov chaw hauv zej zog; cov tshav dav hlau thiab cov chaw nres tsheb yuav tau nruab nrog "cov tshuaj tiv thaiv mus txawv tebchaws" uas pom zoo thiab muab cov tshuaj tiv thaiv microneedle tsim nyog raws li qhov chaw; Thaum muaj kev sib kis, drone swarms yuav xa ntau lab koob tshuaj tiv thaiv microneedle mus rau thaj chaw cuam tshuam hauv 48 teev. FDA xav kom pom zoo thawj cov tshuaj tiv thaiv microneedle cov khoom lag luam hauv xyoo 2025. Los ntawm 2030, kev lag luam tshuaj tiv thaiv kab mob microneedle thoob ntiaj teb tau kwv yees kom ncav cuag 34 billion US las, suav txog 25% ntawm tag nrho cov tshuaj tiv thaiv kev lag luam, ua tiav qhov tsis muaj mob, kab mob khaub thuas -dawb, thiab kev txhaj tshuaj tiv thaiv txhua hnub.