Mahlale a tsa bongaka a lipatlisiso tsa HIV
Patlisiso ea HIV e bile le tsoelo-pele e kholo ho tloha ha vaerase e fumanoa ka lekhetlo la pele mathoasong a bo-1980. Theknoloji ea bongaka e bile matla a susumetsang tsoelo-pele ena—ho tloha tlhahlobong e potlakileng le e nepahetseng haholoanyane le 'mapa oa liphatsa tsa lefutso tsa vaerase ho isa nts'etsopele ea mekhoa ea phekolo ea li-antiretroviral (ARV) e sebetsang haholoanyane. Kajeno, theknoloji ea bongaka ha e thuse bo-rasaense feela ho utloisisa hore na HIV e tšoaetsa 'mele joang empa hape e bula monyako oa thibelo e matla haholoanyane, 'me ka nako e telele, maano a phekolo e sebetsang. Sengoloa sena se hlahloba mahlale a bongaka a bohlokoa lipatlisisong tsa HIV.
1. Tlhahlobo ea sejoale-joale: ho tloha ho fumanoeng ha li-antibody ho ea litekong tsa limolek'hule
E 'ngoe ea lintho tsa bohlokoa tse fihletsoeng karabelong ea HIV e bile ntlafatso ea bokhoni ba ho lemoha tšoaetso ea HIV esale pele. Mehatong ea pele ea seoa sena, tlhahlobo ea tšoaetso e ne e itšetlehile haholo ka ho lemoha li-antibody, e leng se nkang nako hobane 'mele o hloka nako e itseng ho hlahisa karabelo ea' mele ea ho itšireletsa mafung. Hona joale, mahlale a fapaneng a bongaka a lumella ho lemoha ka potlako ka kutloisiso e phahameng.
Liteko tsa moloko oa bone, mohlala, li ka lemoha li-antibodies le p24 antigen, protheine ea HIV e hlahang kapele ka mor'a tšoaetso. Ho feta moo, mahlale a liteko tsa limolek'hule joalo ka PCR (polymerase chain reaction) a lumella ho lemoha ka ho toba lintho tsa lefutso tsa vaerase. PCR e thusa haholo bakeng sa ho khetholla tšoaetso mehatong ea pele haholo, ho beha leihlo mojaro oa vaerase (bongata ba vaerase maling), le ho lekola katleho ea phekolo ea ARV.
Tsoelo-pele ea tlhahlobo ea mafu e boetse e bonahala nts'etsopele ea liteko tse potlakileng tse ka sebelisoang litsing tsa tlhokomelo ea bophelo tse nang le mehloli e fokolang. Ka mokhoa oa tlhokomelo ea batho ba nang le lefu lena, batho ba ka fumana liphetho kapele, ba potlakisa boeletsi, litšupiso le kalafo.
2. Tatellano le bioinformatics: ho utloisisa phetoho le mefuta-futa ea HIV
HIV e tsebahala ka ho ba le sekhahla se phahameng sa phetoho ea liphatsa tsa lefutso. Tšobotsi ena e lumella vaerase ho ikamahanya le maemo kapele, ho kenyeletsoa le ho hlaha ha ho hanyetsa lithethefatsi. Mahlale a tatellano ea liphatsa tsa lefutso—ka bobeli ho latellana ha Sanger le ho latellana ha moloko o latelang (NGS)—a lumella bafuputsi ho bala tatellano ea liphatsa tsa lefutso tsa HIV, ho sekaseka liphetoho tsa lefutso, le ho etsa 'mapa oa likamano lipakeng tsa mefuta e fapaneng.
Ka NGS, bafuputsi ba ka lemoha bongata bo bonyenyane ba vaerase bo ka 'nang ba se ke ba bonahala ka mekhoa e bonolo empa bo na le monyetla oa ho fetoha mefuta e meholo ha khatello ea lithethefatsi e ntse e eketseha. Lintlha tsa tatellano li boetse li thusa bakeng sa tlhokomelo ea mafu a seoa: ho latela mekhoa ea phetisetso, ho khetholla lihlopha, le ho utloisisa matla a seoa sebakeng seo.
Bioinformatics e bapala karolo ho sebetsaneng le sete ena e kgolo ya data. Di-algorithms di sebediswa ho bolela esale pele tshusumetso ya diphetoho meahong ya protheine ya vaerase, ho hlwaya dipheo tse ntjha tsa meriana, le ho etsa mohlala wa hore na vaerase e fetoha jwang ho bakudi. Motswako wa NGS le bioinformatics jwale ke tshiya ya bohlokwa ya dipatlisiso tsa sejwalejwale tsa HIV.
3. Tloaelo ea lisele le mehlala ea in vitro: mekhoa ea ho leka tšoaetso le bakhethoa ba kalafo
Theknoloji ea temo ea sele e nolofalletsa lithuto tse tebileng tsa potoloho ea bophelo ba HIV. Bafuputsi ba sebelisa lisele tse reretsoeng tse kang li-lymphocyte tsa CD4+ T kapa macrophages ho ithuta kamoo kokoana-hloko e khomarelang, e kenang, e ikatisang le ho qoba karabelo ea 'mele ea ho itšireletsa mafung. Ka litsamaiso tsa in vitro, batho ba fapaneng ba ka hlahlojoang tlas'a maemo a laoloang pele ba kena litekong tsa liphoofolo kapa tsa kliniki.
Ntle le moetlo o tloaelehileng oa lisele, theknoloji ea organoid le litsamaiso tsa microfluidic (ka linako tse ling li bitsoa litho-ho-chip) li qala ho sebelisoa ho etsisa tikoloho ea lisele tsa motho ka tsela ea sebele. Sena se bohlokoa hobane HIV e ka tsoela pele ka har'a libaka tse itseng tsa polokelo ea mali, ho kenyeletsoa le lisele tsa lymphoid. Mehlala e etsisang baeloji ea motho haufi-ufi e thusa bafuputsi ho lekola ho kenella ha lithethefatsi, likarabo tsa 'mele oa ho itšireletsa mafung sebakeng seo, le lintlha tse susumetsang ho phehella ha vaerase.
4. Mahlale a nts'etsopele ea lithethefatsi: ho tloha tlhahlobong e phahameng ea tlhahiso ho isa moralong o thehiloeng sebopehong
Ntlafatso ea li-ARV ke e 'ngoe ea lintho tse finyeletsoeng ka ho fetisisa tsa theknoloji ea bongaka. Kajeno, mekhoa ea phekolo e kopaneng e ka thibela meroalo ea vaerase ho isa maemong a sa bonahaleng, ea eketsa tebello ea bophelo, le ho fokotsa kotsi ea phetiso. Phuputsong ea meriana ea HIV, tlhahlobo ea ho fetisa ka bongata (HTS) e sebelisoa ho leka ka potlako metsoako e likete ho isa ho e limilione ho fumana bakhethoa ba thibelang li-enzyme kapa lits'ebetso tsa bohlokoa tsa vaerase.
Ntle le HTS, moralo oa lithethefatsi o thehiloeng sebopehong o sebelisa mekhoa e kang X-ray crystallography, NMR, le cryo-electron microscopy ho fumana litšoantšo tse qaqileng tsa libopeho tsa protheine ea HIV. Ka tlhahisoleseling ena, bo-rasaense ba ka rala limolek'hule tse "tšoanelang" le ho thibela ts'ebetso ea liprotheine tsa bohlokoa, tse kang reverse transcriptase, protease, integrase, kapa liprotheine tse amehang ho keneng ha vaerase liseleng.
Tsela e 'ngoe ea bohlokoa ea hona joale ke nts'etsopele ea mekhoa ea phekolo e sebetsang nako e telele—lithethefatsi tse enteloang kapa tse kenngoang tse sebetsang libeke ho isa likhoeling. Theknoloji ea ho etsa meriana le litsamaiso tsa ho fana ka meriana ke tsa bohlokoa ho netefatsa maemo a tsitsitseng a meriana 'meleng.
5. Theknoloji ea ho itšireletsa mafung le ea li-antibody: ho ea thibelong le kalafong e ncha
Ntle le meriana, theknoloji ea bongaka e khanna mekhoa e thehiloeng ho sesole sa 'mele, joalo ka nts'etsopele ea liente le li-antibodies tsa monoclonal. Sepheo se seholo ke ho thibela li-antibodies ka bophara (bNAbs), li-antibodies tse ka fokotsang mefuta e mengata ea HIV. Li-bNAbs li ntse li ithutoa bakeng sa thibelo (passive prophylaxis) le e le karolo ea maano a phekolo e kopaneng.
Theknoloji ea boenjiniere ba li-antibody e lumella li-antibodies ho ntlafatsoa bakeng sa bophelo bo bolelele, ho thibela kokoana-hloko ka matla, kapa bokhoni ba ho hira lisele tsa 'mele ho senya lisele tse tšoaelitsoeng. Mekhoa ea tlhahlobo ea 'mele ea ho itšireletsa mafung e kang cytometry ea phallo le tatellano ea sele e le 'ngoe e thusa ho khetholla likarabo tse sebetsang tsa 'mele ea ho itšireletsa mafung le ho utloisisa hore na ke hobane'ng ha HIV e le thata hore sesole sa 'mele sa tlhaho se e laole.
6. Ho hlophisa liphatsa tsa lefutso le maano a ho "phekola"
E 'ngoe ea liphephetso tse kholo ka HIV ke boteng ba letamo le patehileng: kokoana-hloko e ka "ipata" liseleng tse itseng 'me ea se ke ea ikatisa ka mafolofolo, e leng se etsang hore ho be thata hore li-ARV li li hlasele. Ha phekolo e emisoa, kokoana-hloko e ka boela ea hlaha. Ka hona, lipatlisiso mabapi le pheko li shebana le mokhoa oa ho felisa kapa ho laola letamo lena.
Mahlale a ho hlophisa liphatsa tsa lefutso joalo ka CRISPR-Cas ke mokhoa o mong o khahlisang. Phuputso e ntse e hlahloba ho kopanngoa ha DNA ea HIV proviral liphatsa tsa lefutso tsa batho, joalo ka CCR5, receptor e sebelisoang ke HIV ho kena liseleng. Ka ntle ho CRISPR, ho boetse ho na le mahlale a kalafo a thehiloeng ho RNA le "kick and kill" (ho kenya tšebetsong vaerase e patiloeng ebe ho bolaea lisele tse tšoaelitsoeng) le "block and notch" (ho notlela vaerase ho e boloka e patiloe ka ho sa feleng).
Leha e tšepisa, theknoloji ena e tobane le liphephetso tse kholo: polokeho, ho nepahala ha sepheo, kotsi ea litlamorao tse sa lebelloang, le bothata ba ho isa sistimi ea ho hlophisa liseleng tse nepahetseng.
7. Liteko tsa bongaka le tlhokomelo e tsamaisoang ke data
Theknoloji ea bongaka e boetse e fetola tsela eo liteko tsa kliniki li etsoang ka eona. Mekhoa ea ho beha leihlo mojaro oa vaerase ka botebo, li-biomarker tsa 'mele oa ho itšireletsa mafung, le tlhahlobo ea ho hanyetsa lithethefatsi li thusa bafuputsi ho lekola katleho ea mekhoa ea ho kenella ka nako ea sebele. Ho feta moo, data e kholo le bohlale ba maiketsetso li sebelisoa ho khetholla mekhoa ea karabelo ea phekolo, ho bolela esale pele kotsi ea ho hloleha ha kalafo, le ho rala maano a thibelo a sebetsang haholoanyane ho baahi ba itseng.
Ho kopanya lintlha tsa bongaka, tsa genomic, le tsa boitšoaro ho ka ntlafatsa kutloisiso ea lintlha tse susumetsang katleho ea kalafo, ho kenyeletsoa ho khomarela kalafo, likamano tsa lithethefatsi, le mafu a mang a kang lefuba kapa hepatitis.
Qetello
Mahlale a tsa bongaka a fetotse sebaka sa lipatlisiso tsa HIV ka botlalo. Ho tloha ho tlhahlobo e potlakileng e thehiloeng ho antigen le PCR, ho ea ho 'mapa oa liphatsa tsa lefutso tsa vaerase ka NGS, ho ea nts'etsopele ea lithethefatsi ka HTS le moralo o thehiloeng ho sebopeho, ho ea ho boqapi ba sesole sa 'mele joalo ka bNAbs le ho hlophisa liphatsa tsa lefutso tse batlisisang - kaofela li kentse letsoho ntlafatsong e kholo ea taolo ea HIV ha e bapisoa le mashome a lilemo a fetileng. Leha liphephetso tse kang libaka tse patiloeng le ho hanyetsa lithethefatsi li ntse li le teng, tataiso ea lipatlisiso e ntse e hlaka haholoanyane: mekhoa ea phekolo e fumanehang habonolo, thibelo e matla, le maano a ho fihlela boemo bo tsitsitseng ba ho se be le vaerase. Nakong e tlang, tsoelo-pele ea mahlale a tsa bongaka e tla lula e le senotlolo sa ho tsamaisa lefats'e haufi le sepheo sa ho felisa seoa sa HIV.
