Ɛnnɛ yɛbɛka nneɛma nketenkete a ɛbɔ yɛn ho ban wɔ yɛn nipadua mu ho asɛm: Polyclonal Antibodies!

So woate nsɛmfua ‘Polyclonal Antibodies’ pɛn? Ebia wotee sɛ oduruyɛfo bi reka, anaasɛ wokenkan wɔ nhoma anaa atesɛm krataa mu wɔ baabi. Ɛwom sɛ eyi betumi ayɛ te sɛ nyansahu mu asɛmfua kakra na ɛyɛ den sɛ yɛbɛte ase de, nanso nokwarem no ɛyɛ biribi a ɛho hia yiye, kɛse ma yɛn nipadua akwahosan na ɛbɔ yɛn ho ban fi nyarewa ho. Enti ɛnnɛ yɛbɛka nea saa polyclonal antibodies yi yɛ, sɛnea ɛyɛ adwuma wɔ yɛn nipadua mu, sɛnea ɛho wɔ mfaso ma yɛn, ne nea ɛyɛ wɔn mfaso ne ɔhaw ahorow, kɛkɛ, te sɛ nea yɛreka akyerɛ yɛn adamfo pa anaa abusua muni bi. Krado?

Sɛ yɛbɛka no tiawa a, dɛn ne saa polyclonal antibodies yi?

Okay, nea edi kan no momma yɛnte nea saa Polyclonal Antibodies yi yɛ ase pefee. So wokae sɛ, sɛ yɛn nipadua yare, kyerɛ sɛ, sɛ biribi te sɛ ɔyare mmoawa hyɛn mu a, yɛwɔ akwaa soronko bi wɔ yɛn nipadua mu a ɛko tia. Ɛno ne nea yɛfrɛ no antibodies. Eyinom te sɛ awɛmfo nketewa, anaa asraafo, wɔ yɛn nipadua mu. Yɛn nipadua na ɛyɛ saa protein ahorow a wɔfrɛ no antibodies yi titiriw sɛnea ɛbɛyɛ a ɛbɛko atia nyarewa ne mmoawa na abɔ yɛn ho ban.

Afei saa nnuru a ɛko tia nyarewa yi fi nkwammoaa pɔtee bi a wɔfrɛ no `(Plasma B nkwammoaa)` mu. Asɛmfua ``polyclonal'' kyerɛ sɛ ``efi ahorow pii mu'' (poly = pii, clonal = abusua/ahorow). Ɛne sɛ, saa polyclonal antibodies yi nyɛ ɔkwan koro, emfi nsunsu koro mu. Wɔyɛ nnuru a ɛko tia nyarewa a wɔaboaboa ano a efi plasma B nkwammoaa abusua ahorow mu (`abusua`), na ɛsono wɔn ho wɔn ho kakra. Fa no sɛ asraafo kuw bi a wofi asraafo akuw ahorow mu wɔ asraafo dɔm koro mu.

Afei saa nnuru a ɛko tia nyarewa yi mu biara, anaa asraafo ahorow, hu antigen koro no ara afã horow. Afei wubisa sɛ, "Dɛn ne antigen?" Fa no sɛ ‘nkyerɛwde’ anaa ‘frankaa’ ketewaa bi a ɛwɔ ɔyare mmoawa, pollen, anaa protein foforo a yennim a ɛhyɛn yɛn nipadua mu so. Ɛdenam saa nkyerɛwde yi a yɛhwɛ so no, yɛn nipadua mu ahoɔden a ɛko tia nyarewa, yɛn nipadua no ahobammɔ nhyehyɛe, hu sɛ ebia ɛyɛ yɛn ankasa (`ankasa`) anaasɛ ɔman foforo so tamfo (`a ɔnyɛ yɛn ho`). Ɛte sɛ ɔtamfo atade, anaa atamfo asraafo frankaa.

Enti, saa polyclonal antibodies yi yɛ asraafo (antibody) ahorow a wotumi hu sɛnkyerɛnnede ahorow, nsusuwii ahorow (yɛde nyansahu frɛ eyinom `epitopes` ) wɔ ɔtamfo koro no ara atade anaa frankaa so (antigen). So wote ase? Ɛte sɛ asraafo kuw bi a wɔn ho akokwaw a wotumi fi mmeae ahorow tow hyɛ ɔtamfo koro no ara so.

Sɛ nnipa ne mmoa afoforo yare, kyerɛ sɛ, sɛ wonya ɔyare mmoawa a, saa polyclonal antibodies yi fi awosu mu na ɛba wɔn nipadua mu. Nanso, wɔtaa nya polyclonal antibodies a wɔde di dwuma wɔ aduruyɛ mu nhwehwɛmu ne ayaresa ahorow bi mu fi mmoa a wɔnom nufusu te sɛ kraman, nguan, ne mpapo hɔ. Ɛtɔ da bi a, wonya fi nnipa a wɔn ho atɔ wɔn wɔ nyarewa bi mu no mogya nso mu.

Ɔkwan bɛn so na saa polyclonal antibodies yi yɛ adwuma ankasa?

Afei ma yɛnhwɛ sɛnea saa polyclonal antibodies yi yɛ adwuma wɔ yɛn nipadua mu, sɛnea wɔko. Sɛ wunya mmoawa, mmoawa, anaa ɔyare mmoawa foforo (ɔyare mmoawa) kɔ wo nipadua mu a, wo nipadua mu tumi a ɛko tia nyarewa no yɛ nnuru a ɛko tia nyarewa de ko tia wɔn.

Saa mmoawa yi wɔ antigens a yɛadi kan aka ho asɛm no wɔ wɔn ani. Nkwammoaa a ɛko tia nyarewa (yɛn asraafo) hu saa antigen ahorow yi na ɛkyekyere wɔn. Antibody biara kyekyere antigen pɔtee biako pɛ. Ɔkwan foforo so no, safe biara hyɛ ɔpon pɔtee biako pɛ mu. Sɛ antibody bi kyekyere antigen bi a, ɛde sɛnkyerɛnne kɔ nipadua no mu tumi a ɛko tia nyarewa no nkae no nkyɛn, na ɛka sɛ, "Ɔtamfo bi ni, afei sɛe no."

Nanso, wɔ antigen biako mpo fam no, mmeae pii betumi aba a antibody no bata ho, te sɛ mpɔtorɔ safe tokuru. Yɛfrɛ saa mmeae pɔtee a ɛkyekyere yi `(epitopes)`. Enti polyclonal antibodies a ɛwɔ wo mogya mu, anaasɛ ɛwɔ concentrated solutions (`serums`) a wɔde ma de sa yare no mu no yɛ antibodies ahorow a wɔaboaboa ano. Saa antibodies yi mu biara tumi hu na ɛkyekyere `(epitopes)` (beae ahorow a ɛkyekyere) ahorow wɔ saa antigen no so. Ɔkwan foforo so no, ɛte sɛ asraafo akuw ahorow pii a wɔreyɛ adwuma bere koro mu de akyere ɔtamfo koro no ara.

Fa no sɛ ɔtamfo kɛse bi wɔ hɔ. Sɛ ɛnyɛ beae biako nko na wubetumi akyere saa ɔtamfo no, na mmom wɔ mmeae pii prɛko pɛ, te sɛ ne nsa, ne nan, ne ti, ne ne kɔla a, hokwan a ɛwɔ hɔ sɛ wubedi ɔtamfo no so na wamma ontumi nyɛ hwee no yɛ kɛse koraa. Saa na polyclonal antibodies yɛ adwuma. Nnuru a ɛko tia nyarewa ahorow (`lineages`) ma nipadua no mu tumi a ɛko tia nyarewa no nya hokwan pii de hu, tow hyɛ so, na ɛkyere mmoawa. Eyi ma yɛn nipadua no ahobammɔ mu yɛ den mpo.

Dɛn na yɛde polyclonal antibodies di dwuma ma?

Wɔde saa polyclonal antibodies yi a yefi awosu mu yɛ wɔ yɛn nipadua mu no nso di dwuma wɔ nnuruyɛ mu de yɛ nneɛma a ɛho hia pii. Momma yɛnhwɛ nea wɔyɛ:

• Yareɛ a wobɛhunu: Nhwehwɛmu bi wɔ hɔ a wɔyɛ wɔ aduruyɛdan mu a ebia woate ho asɛm, te sɛ ELISA nhwehwɛmu ne Immunohistochemistry sɔhwɛ. Saa nhwehwɛmu yi de polyclonal antibodies di dwuma de hu nyarewa ahorow a ɛde ɔyare ba (e.g. HIV, hepatitis) ne kokoram. Ɛne sɛ, wotumi hu sɛ ebia mogya bi mu antigen a ɛfa yare no ho pɔtee bi wom anaa.

• Nyansahu mu nhwehwɛmu: Nhwehwɛmufo de saa polyclonal antibodies yi di dwuma de te sɛnea yɛn nipadua yɛ adwuma, sɛnea nkwammoaa ahorow yɛ adwuma, sɛnea nyarewa ka yɛn, na wɔhwehwɛ nnuru foforo. Wɔte sɛ nnwinnade a ɛboa nyansahufo ma "wohu" nneɛma a wontumi nhu.

• Nyarewa a wɔde yare mmoawa ba ne akwahosan tebea horow bi a wɔsa anaa wosiw ano:Polyclonal antibodies betumi asa nnuru bi a wɔnom boro so, awɔ a awuduru wom a wɔka, ne nyarewa bi a efi mogya mu, na wɔ tebea horow bi mu no, esiw ano.

Dɛn ne ayaresa ahorow a wɔde polyclonal antibodies di dwuma?

Momma yɛnhwɛ ayaresa a wɔde polyclonal antibodies di dwuma no bi yiye:

• Nnuru a ɛko tia nyarewa bi wɔ polyclonal antibodies. Wɔnam awɔ awuduru kakraa bi a wɔde gu mmoa te sɛ apɔnkɔ mu, na afei wɔtew nnuru a ɛko tia nyarewa a saa mmoa no yɛ no ho so na ɛyɛ eyinom. Sɛ ɔwɔ ka wo a, nnuru a ɛko tia nyarewa a ɛwɔ nnuru a ekum awuduru no mu no kɔ na ɛma awuduru no yɛ nea ɛnyɛ hwee.

• Convalescent plasma: Ebia woate eyi ho asɛm wɔ COVID-19 ɔyaredɔm no mu. Bere a nyarewa bi a emu yɛ den a ɛde ɔyare mmoawa ba a ɛpae gui no, wɔde plasma (mogya no fã a ɛyɛ nsu) a woyi fi nnipa a wɔn ho atɔ wɔn wɔ saa yare no mu no mogya mu ma ayarefo. Efisɛ saa plasma no kura polyclonal antibodies a wɔn nipadua ayɛ atia saa yare no. Sɛ saa nnuru a ɛko tia nyarewa yi hyɛn ɔyarefo no nipadua mu a, ɛboa ma wɔko tia yare no.

• Digoxin immune fab: Eyi yɛ vaccine a wɔde ma sɛ ebia obi de koma aduru digoxin boro so a. Eyi nso wɔ polyclonal antibodies a wɔayɛ tia digoxin molecule no.

• Rho(D) immune globulin: Wɔsan frɛ eyi `RhIG`, na ebia wubehu nso sɛ wɔakyerɛw no sɛ `Rh 0 (D)`. Wɔde eyi ma ɛnanom a wɔyem a wɔn mogya yɛ `Rh-negative`. Nea enti a ɛte saa ne sɛ, sɛ ɛna no mogya yɛ `Rh-negative` na akokoaa no mogya yɛ `Rh-positive` a, ɛna no nipadua betumi anya nnuru a ɛko tia akokoaa no mogya. Ɛwom sɛ ebia eyi renka akokoaa a odi kan no de, nanso sɛ wɔwo akokoaa a ɔto so abien a ɔwɔ `Rh-positive` a, saa nnuru a ɛko tia nyarewa no betumi apira akokoaa no. Wɔfrɛ eyi `(Rhesus isoimmunization)` (Rhesus a ɛne ne ho nhyia). Eyi ne nea wɔde `Rho(D)` vaccine no ma de siw ano. Wɔsan nso de ma sɛ ayaresa ma `(Chronic immune thrombocytopenia)` anaa `(ITP)`, tebea a ɛma mogya mu nkwammoaa a ɛwɔ mogya no mu no so tew.

Nsonsonoe bɛn na ɛwɔ polyclonal ne monoclonal antibodies ntam?

Okay, afei ebia wowɔ asɛmmisa ketewaa bi. Afei nso, ɔkwan bi wɔ hɔ a wɔfrɛ no ‘Monoclonal Antibodies’, nsonsonoe bɛn na ɛda eyinom ne saa polyclonal antibodies yi ntam? Wɔn baanu nyinaa yɛ antibodies, na abien no nyinaa de wɔn ani si antigens so. Nanso nsonsonoe ahorow bi a ɛho hia wɔ hɔ.

Sɛ yɛbɛka no tiawa a:

• Polyclonal Antibodies: Eyinom fi B nkwammoaa abusua ahorow mu. Enti wobetumi ahu na wɔakyekyere `(epitopes)` (beae a ɛkyekyere) ahorow pii wɔ antigen koro no ara so. Ɛte sɛ asraafo kuw bi a wɔwɔ nimdeɛ soronko ne akode ahorow. Wofi mmeae ahorow tow hyɛ ɔtamfo koro no ara so.

• Monoclonal Antibodies: Eyinom yɛ ``nkyerɛwde pɛpɛɛpɛ`` a ɛyɛ antibody biako. Ɛne sɛ, B nkwammoaa abusua biako na ɛyɛ wɔn. Enti, wohu na wɔkyekyere ``epitope`` biako pɛ. Te sɛ asraafo a wɔayɛ wɔn mfonini a wɔde akode koro no ara di dwuma no, tow hyɛ botae biako pɛ so.

Wɔ aduruyɛ mu no, wɔtaa nya polyclonal antibodies fi mmoa te sɛ kraman, mpapo, ne nguan mogya mu. Ɛtɔ mmere bi a, wonya fi nnipa hɔ nso (e.g., ayarefo a wɔn ho atɔ wɔn no mogya mu nsu). Wodi kan nya monoclonal antibodies fi mmoa mogya mu na afei wɔsan yɛ bio wɔ lab. Mprempren, wɔtaa de monoclonal antibodies di dwuma sen polyclonal antibodies wɔ aduruyɛ mu, titiriw ma nyarewa te sɛ kokoram, efisɛ ɛyɛ pɔtee wɔ nea wɔde wɔn ani si so no mu.

Mfaso bɛn na ɛwɔ polyclonal antibodies so?

Enti mfaso bɛn na ɛwɔ saa polyclonal antibodies yi so? Dɛn nti na yɛda so ara de di dwuma?

• Ɛka a wɔbɔ wɔ nneɛma a wɔyɛ ho no sua koraa. Ɛyɛ mmerɛw sɛ wɔbɛyɛ eyinom sen sɛ wɔbɛyɛ nnuru a ɛko tia nyarewa a wɔfrɛ no monoclonal antibodies.
• Eyi betumi ahu antigens a ɛwɔ nhwɛsode bi mu wɔ dodow a ɛba fam koraa mu, sɛ ɛwɔ hɔ wɔ dodow a ɛba fam koraa mpo a. Esiane sɛ nnuru ahorow a ɛko tia nyarewa bom yɛ adwuma nti, sɛ wɔpa biako mpo a, hokwan kɛse wɔ hɔ sɛ wɔbɛkyere foforo.
• Tumi a wotumi hu antigen bi nyinaa yɛ kɛse. Esiane sɛ antibodies pii wɔ hɔ a ebetumi akyekyere ``epitopes'' ahorow nti, nea ebetumi aba sɛ wobehu antigen bi no yɛ kɛse, sɛ mpo ne nsusuwii yɛ soronko kakra a.

So ɔhaw ahorow bi wɔ hɔ saa bere no?

Mfaso ne ɔhaw ahorow wɔ saa polyclonal antibodies yi so. Ɛyɛ papa sɛ wubehu nea wɔyɛ.

• Esiane sɛ eyinom fi abɔde mu (onipa anaa mmoa mogya) nti, ɛnyɛ nea ɛkɔ so pɛpɛɛpɛ wɔ su ne nea ɛwom mu fi kuw biako so kosi foforo so, na ɛnte sɛ nnuru a wɔyɛ wɔ aduruyɛdan mu. Eyi kyerɛ sɛ ebia nsonsonoe kakra bɛda antibody afrafra a wɔyɛe bere bi ne afrafrade a wɔyɛe bere foforo no ntam. Enti, sɛnea etu mpɔn no nso betumi ayɛ soronko kakra.
• Sɛ wɔde monoclonal antibodies di dwuma a, asiane kɛse wɔ hɔ sɛ cross-reactivity bɛba. Ɛne sɛ, hokwan kɛse wɔ hɔ sɛ antigen a wɔde wɔn ani asi so no bɛkyekyere antigen foforo (nea yɛmpɛ). Eyi betumi de ɔhaw ahorow aba sɔhwɛ anaa nhwehwɛmu mu. Sɛ nhwɛso no, atoro a ɛyɛ papa betumi aba. Ɛne sɛ, obi a onni yare no betumi anya nea efi mu ba a ɛte sɛ nea ɔwɔ yare no. Enti, sɛ biribi pa bi san ba, te sɛ nea ɛte wɔ nyarewa a emu yɛ den a wɔde yare mmoawa ba mu no a, ebia ebehia sɛ nnuruyɛfo yɛ nhwehwɛmu pii de si so dua.
• Sɛ wɔde polyclonal antibodies a efi mmoa mu di dwuma de sa yare a, asiane kɛse wɔ hɔ sɛ obi benya akisikuru anaasɛ nneɛma afoforo a ɛde ba, efisɛ saa mmoa protein ahorow yi yɛ ahɔho ma yɛn nipadua.

Nea etwa to no, nneɛma a ɛho hia sen biara a ɛsɛ sɛ wokae

Enti, ebia afei woate ase sɛ polyclonal antibodies yɛ yɛn nipadua no nipadua mu ahoɔden a ɛko tia nyarewa no fã a ɛho hia yiye, na ɛho hia wɔ aduruyɛ ho nyansahu mu ma nhwehwɛmu, nhwehwɛmu, ne ayaresa pɔtee bi.

Wɔtaa de eyinom yɛ nhwehwɛmu ne nhwehwɛmu a wɔde hu yare. Nanso, sɛ woanyinsɛn na wowɔ mogya a Rh-negative (wo duruyɛfo bɛka eyi ho asɛm akyerɛ wo), sɛ wowɔ yare a emu yɛ den a ɛde ɔyare mmoawa ba (te sɛ diphtheria), sɛ ɔwɔ aka wo, anaasɛ wowɔ tebea bi te sɛ chronic immune thrombocytopenia (ITP) a, wobetumi ama wo aduru bi a polyclonal antibodies wom.

Sɛ wowɔ nsɛmmisa anaa nsɛm foforo biara a ɛhaw wo wɔ eyi ho a, ntwentwɛn wo nan ase sɛ wubebisa wo duruyɛfo anaa ɔyarehwɛfo. Wɔbɛkyerɛkyerɛ saa nneɛma yi mu akyerɛ wo kɔ akyiri. Efisɛ sɛ wobɔ wo amanneɛ wɔ w’akwahosan ne ayaresa a wɔde ma wo ho a, ɛyɛ anammɔn a eye sen biara a wobɛfa so anya apɔwmuden na w’ani agye no mu biako!

` Polyclonal Antibodies, Nkwammoaa a ɛko tia nyarewa, Nkwammoaa a ɛko tia nyarewa, Antigen, Epitope, Nhwehwɛmu, Aduruyɛ