Iqonga loPhuhliso lwe-Aptamer

Ii-aptamers zii-oligonucleotide ezine-stranded single-stranded (i-DNA, i-RNA okanye i-XNA) ezineempawu ze-affinity ephezulu kunye ne-specificity ephezulu ezibopha ngokukodwa kwiimolekyuli ezijoliswe kuzo ezifana nee-antibodies, kwaye zisetyenziswa kakhulu ekuphuhliseni ii-biosensors, ukuxilongwa kunye nonyango.

Iqonga le-aptamer elibonelelwa yi-Alpha Lifetech liquka iindidi ezimbini: iqonga lokwenziwa kwe-aptamer, elibandakanya ikakhulu inkonzo yokwenziwa kwethala leencwadi le-SELEX aptamer kunye nenkonzo yophuhliso lwe-aptamer (i-DNA, i-RNA okanye i-XNA), kunye neqonga lokuhlolwa kwe-aptamer kuquka iinkonzo zokuhlolwa ezisekelwe kwitekhnoloji ye-SELEX yeeproteni, iipeptides, iiseli, iimolekyuli ezincinci, ii-ion zesinyithi kunye nezinye iimolekyuli ekujoliswe kuzo, kunye neenkonzo zokuhlaziya kunye nokuchonga i-aptamer ezisezantsi.

Iqonga le-Aptamer Synthesis

Inkonzo yokwenziwa kwethala leencwadi le-SELEX aptamer

Inkonzo yokwenziwa kwethala leencwadi le-SELEX aptamer ibandakanya kakhulu ekwakheni ithala leencwadi eliqulathe inani elikhulu leenkqubo ze-oligonucleotide ezinemicu enye ezingacwangciswanga ngokwenziwa kweekhemikhali ze-in vitro ngokweemolekyuli ekujoliswe kuzo. Ukwakhiwa kwethala leencwadi yindawo yokuqala yetekhnoloji ye-SELEX, ebonelela ngeenkqubo ezininzi zenkqubo yokuhlolwa elandelayo ngokwakha iithala leencwadi ezinkulu ezingacwangciswanga kwaye yandisa amathuba okuhlola ii-aptamers ezihambelana kakhulu.

Ukwenziwa kwethala leencwadi kwahlulwe kakhulu ngala manyathelo alandelayo:

Amanyathelo	Iinkcukacha zeTekhnoloji
Chonga iiMolekyuli ezijoliswe kuzo	Chonga iimolekyuli ekujoliswe kuzo ekufuneka zihlolwe ii-aptamers, ezinokuba ziiproteni, ii-nucleic acids, iimolekyuli ezincinci, ii-ion zesinyithi, njl.njl.
Uyilo lwe-Random Sequence	Ubude bolandelelwano olungacwangciswanga, ukwakheka kwesiseko kunye nezinye iiparameter zenziwe ngokweempawu zeemolekyuli ekujoliswe kuzo kunye neemfuno zokuhlola. Ngokwesiqhelo, ulandelelwano olungacwangciswanga luphakathi kwamashumi namakhulu eziseko ngobude.
Ukwenziwa kweZilandelelwano eziQinisekileyo	Iziqwenga ze-oligonucleotide ezinee-sequences ezizinzileyo (ezifana ne-PCR primer sequences) kuzo zombini iziphelo ziyilwe kwaye zenziwe, eziza kusetyenziswa kwinkqubo elandelayo yokukhulisa nokuhlola.

Ithala leencwadi elidityanisiweyo kusafuneka liqhubeke nokucutshungulwa ukuze kulawulwe umgangatho. Uxinaniso lwethala leencwadi lumiselwe ukuqinisekisa ukuba luyasebenza kwinkqubo yokuvavanya elandelayo. Ukwahlukahlukana kunye nokuchaneka kokulandelelana okungacwangciswanga kwithala leencwadi kuqinisekiswe ngokulandelelana kunye nezinye iindlela zokuqinisekisa ukuba umgangatho wethala leencwadi uyahlangabezana neemfuno zokuhlola.

Ngala manyathelo angentla, ithala leencwadi le-SELEX aptamer elikumgangatho ophezulu nelihlukeneyo kakhulu linokwenziwa, elinokubonelela ngolandelelwano oluninzi lwenkqubo yokuvavanya elandelayo.

Iinkonzo zophuhliso lwe-Aptamer (i-DNA, i-RNA okanye i-XNA)

Ii-Aptamers zihlala zibhekisa kwii-nucleic acid aptamers. Ii-Nucleic acid aptamers ziquka ii-DNA aptamers, ii-RNA aptamers, kunye nee-XNA aptamers eziguqulwe ngokweekhemikhali ii-nucleic acid aptamers. Indlela ye-SELEX isetyenziswa kakhulu ekuphuhliseni ii-aptamers. Umsebenzi osisiseko weenkonzo zophuhliso lwee-aptamer uquka ukwakhiwa kwethala leencwadi, ukubopha iithagethi, ukwahlukanisa kunye nokucoca, ukukhulisa, ukuvavanya izihlandlo ezininzi, kunye nokuchongwa kolandelelwano. Kangangeminyaka emininzi, besigxile ekwakheni ithala leencwadi kunye namava amaninzi ekuphuhliseni ii-aptamer. Sizimisele ukubonelela abathengi ngeenkonzo ezingcono.

Inkqubo yeTekhnoloji ye-SELEX

Inkqubo ye-SELEX inemijikelo emininzi, nganye enamanyathelo aphambili alandelayo:

Ukubopha iThala leeNcwadi kunye neeNjongo

Ilayibrari ye-nucleic acid eyakhiweyo ixutywe neemolekyuli ezithile ekujoliswe kuzo (ezifana neeproteni, iikhompawundi ezincinci zemolekyuli, njl.njl.), ukuze ulandelelwano lwe-nucleic acid kwilayibrari lube nethuba lokuzibophelela kwiimolekyuli ekujoliswe kuzo.

Ukuhlukaniswa kweeMolekyuli ezingabotshwanga

Ulandelelwano lwe-nucleic acid olungabotshelelwanga kwi-molecule ekujoliswe kuyo lwahlulwe kumxube ngeendlela ezithile ezifana ne-affinity chromatography, ukwahlukana kweentsimbi zemagnethi, njl.njl.

Ukwandiswa kweeMolekyuli eziDibanisayo

Ulandelelwano lwe-nucleic acid olubotshelelwe kwi-molecule ekujoliswe kuyo luyandiswa, ludla ngokusetyenziswa iteknoloji ye-polymerase chain reaction (PCR). Kwisigaba sokuhlola esilandelayo, ulandelelwano oluphuculweyo luya kusetyenziswa njengethala leencwadi lokuqala.

Umfanekiso 1: Inkqubo yokuhlolwa kwe-SELEX

Iqonga Lokuhlola i-Aptamer

Inkonzo yokuhlolwa kwe-Aptamer

I-Alpha Lifetech inikezela ngeenkonzo ezahlukeneyo zokuhlola i-aptamer ezizodwa zisebenzisa iindlela ezahlukeneyo ze-SELEX kwiintlobo ezahlukeneyo zeemolekyuli zakho:

Iintlobo zeTarget	Iinkcukacha zobugcisa
Ukuhlolwa kweProtein Aptamer yi-SELEX	Eyona njongo iphambili yokuhlolwa kwe-protein aptamer kukuhlola ii-aptamers ezinokubophelela ngokukodwa kwiimolekyuli zeproteni ekujoliswe kuzo. Ezi aptamers kulula ukuzenza, zizinzile kwaye azichaphazeleki kakhulu ziimeko zokusingqongileyo.
Ukuhlolwa kwePeptide Aptamer yi-SELEX	Ii-aptamers zePeptide ziluhlu lwee-peptide sequences ezimfutshane ezinobungcali obuphezulu kunye nobudlelwane, ezinokubophelela ngokukodwa kwizinto ezijoliswe kuzo kwaye zibonise uluhlu olubanzi lwamandla okusetyenziswa kwicandelo le-biomedical. Ngenkqubo ethile yokuvavanya, ii-peptide aptamers ezinokubophelela ngokukodwa kwiimolekyuli ezijoliswe kuzo zihlolwe kwinani elikhulu leelayibrari ze-peptide sequence ezingacwangciswanga.
Uvavanyo lwe-Aptamer olukhethekileyo kwiSeli (iSeli-SELEX)	Iiseli ezijoliswe kuzo okanye iimolekyuli ezithile kumphezulu weseli zilungiswa njengeethagethi. Iithagethi zinokuba ziiseli ezipheleleyo, ii-receptors kwi-membrane yeseli, iiproteni, okanye ezinye iimolekyuli ezincinci.
Ukuhlolwa kwe-Aptamer yeMolekyuli encinci yi-Capture SELEX	I-Capture SELEX yindlela yokuhlola i-in vitro yokuhlola ii-aptamers zemolekyuli ezincinci, eziluhlobo lwe-SELEX. I-Capture SELEX ifanelekile ngokukodwa ekuhlolweni kwee-aptamer zeethagethi zemolekyuli ezincinci, ezihlala zinamaqela ambalwa asebenzayo kwaye kunzima ukuzithintela ngokuthe ngqo kwiinkxaso zesigaba esiqinileyo.
Iinkonzo ze-SELEX ezisekelwe kwiZilwanyana eziPhilayo	Inkonzo yokuhlola izilwanyana eziphilayo yindlela yovavanyo esetyenziswa kakhulu kwicandelo le-bioscience, amayeza kunye ne-biotechnology, esebenzisa izilwanyana eziphilayo njengeemodeli zovavanyo zokuhlola nokuvavanya iimolekyuli ezithile, ugqirha, unyango okanye iinkqubo zebhayoloji. Ezi nkonzo zenzelwe ukulinganisa imeko-bume yomzimba womntu ukuze kuqikelelwe ngokuchanekileyo kwaye kuvavanywe ukusebenza kakuhle kunye nokhuseleko lweziphumo zovavanyo emzimbeni womntu.

Inkonzo yokwenza ngcono i-Aptamer

Ukuthamba kwamanzi, ukulahleka okuphezulu kobudlelwane ngexesha lokuveliswa, kunye nokukhutshwa ngokukhawuleza kwee-aptamers kuthintela ukusetyenziswa kwazo. Okwangoku, iindlela ezahlukeneyo zokuphucula ukusebenza kwee-aptamers ziye zahlolwa.

Sikwanazo neendlela ezahlukeneyo zokwenza ngcono i-aptamer equka ukunqunyulwa, ukuguqulwa, ukuhlanganiswa kwiqela elifanelekileyo (i-thiol, i-carboxy, i-amine, i-fluorophore, njl.njl.).

Inkonzo yohlalutyo lweempawu ze-Aptamer

Inkonzo yohlalutyo lweempawu ze-Aptamer ibhekisa kwinkonzo yobungcali yokusombulula ulwakhiwo lovavanyo lokusebenza kunye nokuqinisekiswa kokusebenza kwe-aptamer efunyenweyo ukuqinisekisa ukuba i-aptamer iyahlangabezana neemfuno ezithile zokubopha, uzinzo kunye nokucaciswa. Ibandakanya ikakhulu uhlalutyo lwe-affinity kunye nokucaciswa, uvavanyo lozinzo kunye nokuqinisekiswa komsebenzi webhayoloji.