Chidzidzo pamusoro peFarmacokinetics yeMishonga yeZvipfuyo
Pharmacokinetics ibazi resainzi rinoongorora "rwendo" rwemishonga mumuviri kubva pakupinda kwayo kusvika pakupera kwayo. Munyaya yemishonga yemhuka, pharmacokinetics inokosha nekuti mhuka dzine mhando dzakasiyana-siyana dzemarudzi, saizi yemuviri, physiology, kudya, uye maitiro kupfuura vanhu. Kusiyana uku kunokanganisa kuti mishonga inotorwa sei, inoparadzirwa sei, inogadziriswa sei, uye inoburitswa sei. Kudzidza nezvemishonga yemhuka kunobatsira vanachiremba vemhuka kuona madhigirii akachengeteka uye anoshanda, kusarudza nzira dzakakodzera dzekupiwa, uye kuderedza njodzi yemigumisiro uye masara emishonga mumhuka dzekudya.
Pfungwa huru dzeFarmacokinetics: ADME
Kazhinji, pharmacokinetics yakakamurwa kuita maitiro mana makuru, anozivikanwa nechidimbu cheADME: Absorption, Distribution, Metabolism, and Excretion. Maitiro mana aya anoshanda zvakatevedzana asi anokanganisa mumwe nemumwe, achiumba huwandu hwemishonga muropa kana munyama nekufamba kwenguva.
1. Kunwisa
Kunyudzwa kwemushonga inzira iyo mushonga unopfuura nayo kubva panzvimbo yaunopinzwa uchienda kuropa. Mumhuka, kunyudzwa kwemushonga kunonyanya kukanganiswa nenzira yaunopinzwa nayo—semuenzaniso, nemuromo, netsinga, nepasi pevhu, netsinga, nekufema, kana nejira repamusoro. Kupinzwa kwemushonga netsinga kunoonekwa sekukurumidzira nekuti mushonga unopinda muropa zvakananga, uchipfuura zvinodzivirira kunyudzwa kwemushonga.
Pakunwa nemuromo, zvinhu zvakawanda zvinopesvedzera kunwa kwemuviri: pH yemudumbu, mwero wekubuda kwemuviri mudumbu, kuwanikwa kwechikafu, kuumbwa kwemushonga, uye kugona kwemushonga kuyambuka membrane yemudumbu. Zvipfuyo zvakaita semombe nembudzi zvine rumen inogona "kushandura" mishonga kuburikidza nekuvirisa kana kudzivirira kuwanikwa kwayo nekuvabata murumen. Mumhuka dzinodya nyama dzakadai sekatsi, mimwe mishonga inotorwa zvakasiyana nembwa nekuda kwekusiyana kwemetabolism uye kunzwa kwemuviri.
Chinhu chakakosha muchikamu chekunyudzwa kwemushonga i-bioavailability (F), chikamu chemushonga chinosvika pakuyerera kweropa mumuviri chiri muchimiro chawo chinoshanda. Bioavailability inogona kuderedzwa ne "first-pass effect" muchiropa, iyo metabolism yekutanga inoitika mushonga usati wapinda muropa zvizere.
2. Kugovera
Kupararira kwemushonga kubva muropa kuenda kunhengo dzemuviri. Mushure mekunwa mushonga uyu, unosunga mapuroteni eplasma (semuenzaniso, albumin) kana kuti unoramba uri muchimiro chawo chakasununguka. Muchimiro chakasununguka chinowanzo shanda mumishonga. Kuwanda kwekusunga mapuroteni kunokanganisa nguva yekushanda uye mukana wekubatana kwemushonga. Mhuka dzine hypoalbuminemia (semuenzaniso, nekuda kwechirwere chechiropa kana kushaya chikafu chakakwana) dzinogona kuva nechikamu chikuru chemushonga wakasununguka, zvichiwedzera njodzi yekukuvadzwa.
Kupararira kweropa kunokonzerwawo nekuyerera kweropa munyama. Nhengo dzine ropa rakawanda, dzakadai sechiropa, itsvo, nemapapu, dzichagamuchira mishonga nekukurumidza kupfuura mafuta. Mumhuka dzine mafuta akawanda, mishonga inouraya mafuta inogona kuungana munyama yemafuta yoburitswa zvishoma nezvishoma, zvichiita kuti mhedzisiro yacho iwedzere. Zera rakakoshawo: mhuka diki dzine maumbirwo akasiyana emuviri uye chivharo cheropa neuropi chisina kukura, zvichiita kuti mimwe mishonga ive nyore kusvika kuhurongwa hwetsinga.
3. Kugayiwa kwemuviri
Kuchinja kwemakemikari emishonga kunonyanya kuitika muchiropa, kunyange hazvo itsvo, mapapu, uye ura zvichigonawo kuita basa. Chinangwa chikuru chekuchinja kwemakemikari emushonga ndechekuita kuti mushonga ubudiswe zviri nyore. Maitiro aya anowanzo kamurwa kuita zvikamu zve phase I reactions (oxidation, reduction, hydrolysis) uye zvikamu zve phase II reactions (conjugation).
Mukurapa kwemishonga yemhuka, kusiyana kwemarudzi muma enzymes emuviri kwakakosha. Semuenzaniso, katsi dzinozivikanwa kuti dzine simba rekubatanidza glucuronidation kupfuura imbwa, zvichiita kuti mimwe mishonga ive chepfu kwavari. Mhuka dzinodya mhuka, mabhiza, shiri, nemhuka dzisiri dzemuno dzinewo hunhu hwadzo hwemuviri. Saka, mishonga haigone kungo "torwa" kubva kumishonga yevanhu; ruzivo rwemhando dzakasiyana runodiwa.
4. Kubvisa tsvina
Kuburitsa mishonga mumuviri inzira yekubvisa mishonga nezvinhu zvinoigadzira mumuviri. Nzira huru yekuburitsa mishonga inowanzo pfuura nemutsvo (weti), asi inogonawo kuitika kuburikidza netsvina (manyoka), mapapu (kufema), mukaka, kana ziya. Mumhuka dzemukaka, kubuda mumukaka inyaya huru nekuda kwekubatana kwayo nemasara emishonga anogona kutakurwa kuenda kuzvigadzirwa zvekudya.
Kushanda kweitsvo kunokanganisa zvakanyanya mwero wekubuda kwemvura mumuviri. Kushaya mvura mumuviri, chirwere cheitsvo, kana kuvhunduka kunogona kuderedza kubuda kwemvura mumuviri, zvichiita kuti mushonga ugare mumuviri kwenguva yakareba. Izvi zvinoreva kuti nguva dzekutora mushonga dzingada kuwedzerwa kana kuti kuderedzwa kwemushonga kudzivirira kuungana kwemudumbu.
Zvikamu Zvikuru muZvidzidzo zvePharmacokinetic
Zvidzidzo zvePharmacokinetic zvinowanzoburitsa huwandu hwezviyero zvinobatsira kufanotaura maitiro emushonga:
1. Cmax: huwandu hwepamusoro hwemushonga muplasma.
2. Tmax: nguva yekusvika Cmax.
3. AUC (Nzvimbo Iri Pasi Pechinotenderera): kubatwa kwese kwemushonga nekufamba kwenguva; inotsanangura huwandu hwemushonga "unoonekwa" nemuviri.
4. t½ (hafu yehupenyu): nguva inodiwa kuti huwandu hwemushonga huderere nehafu; ine chekuita nehuwandu hwekushandiswa.
5. Vd (huwandu hwekugoverwa): chiyero chedzidziso chinotsanangura kuti mushonga unopararira sei munyama.
6. Cl (clearance): kugona kwemuviri kubvisa mushonga; chinhu chakakosha pakusarudza madosi ekuchengetedza.
Izvi zvinowanzo verengerwa kubva muropa rinodzokororwa mushure mekupiwa mushonga, uye zvinozoongororwa uchishandisa pharmacokinetic model (imwe compartment, mbiri-compartment, kana isiri-compartment model).
Nzira dzeKutsvaga Pharmacokinetic muMhuka
Kugadzirwa kwezvidzidzo zvemishonga mumhuka kunosanganisira kusarudzwa kwemhando dzakakwana uye saizi yemuenzaniso, kuona nzira yekupa mishonga, kuunganidzwa kwesamples dzemuviri (plasma, serum, weti, mukaka), uye kuongororwa kwehuwandu hwemishonga uchishandisa nzira dzakadai seHPLC kana LC-MS/MS.
Vaongorori vanofungawo nezvemamiriro ekunze uye manejimendi ekuchengeta mhuka, sezvo kushushikana, shanduko mukudya, uye tembiricha zvinogona kukanganisa mashandiro emhuka. Muzvipfuyo, zvidzidzo zvinofanirwa kutarisana nepfungwa dzetsika nemagariro, kusanganisira kuderedza marwadzo panguva yekutora sampuli uye kushandisa anesthesia yemuno kana zvichidikanwa.
Uyezve, zvidzidzo zvemishonga zvinogona kuitwa kumhuka dzine hutano nedzine chirwere. Zvirwere zvakaita sehutachiona hwemuviri, kuzvimba, kana kusashanda zvakanaka kwechiropa zvinogona kuchinja kupararira kwemishonga uye kugaya kwayo. Ruzivo kubva kumhuka dzine chirwere runowanzo shandiswa zvakanyanya mukurapa, kunyangwe kushandiswa kwacho kwakaoma.
Mashandisirwo Anoshanda: Chipimo, Nguva, uye Zvasara zveMishonga
Chinangwa chikuru che pharmacokinetics mukurapa kwemhuka ndechekuvandudza kurapwa. Semuenzaniso, mamwe ma antibiotic anoshanda zvakanaka kana huwandu hwawo huchiramba huri pamusoro pehuwandu husingabvumidzwe (MIC) kwenguva yakatarwa, nepo mamwe achishanda zvakanyanya kana asvika padanho repamusoro. Nekunzwisisa chimiro chemushonga, vanachiremba vemhuka vanogona kugadzirisa chiyero uye frequency.
Mumhuka dzinodya chikafu, pharmacokinetics ine chekuitawo nenguva yekurega kushandisa zvinodhaka, nguva inofanira kupfuura chigadzirwa (nyama, mukaka, mazai) isati yachengetedzwa kudyiwa nevanhu. Zvisaririra zvemishonga zvinodarika miganhu iyi zvinogona kukonzera njodzi kuhutano hwevanhu nematambudziko emutemo. Saka, kunzwisisa pharmacokinetics kunobatsira kuona kuchengetedzeka kwechikafu ukuwo mishonga ichiramba ichishanda zvakanaka muzvipfuyo.
Matambudziko neZviri Kuitika Pari Zvino
Dambudziko guru nderekuti pane data shoma remishonga rinowanikwa kumhuka dzekunze nemhuka dzesango. Mishonga yakawanda inoshandiswa isina kunyorwa nekuti zvigadzirwa zvehunyanzvi hazvisati zvavepo. Izvi zvinowedzera kudiwa kwekutsvaga kwakadzama uye nzira dzekugadzira mafomu dzakadai sePK/PD modelling uye simulation kuti kufanotaura huwandu hwakakodzera hwemishonga.
Uyezve, kufambira mberi muhunyanzvi hwekuongorora kunobvumira kuonekwa kwemishonga pahuwandu hwakaderera zvikuru, zvichiita kuti zvidzidzo zvemishonga zvive zvakarurama. Kushandiswa kwenzira dzekurapa mishonga yevanhu, idzo dzinodzidza kusiyana kwevanhu mukati memapoka makuru, kunobvumira kuti pave nekuongororwa kwakasarudzika zvichienderana nezvinhu zvakaita sezera, huremu, rudzi, uye mamiriro ehutano, kuri kuwedzerawo.
Mhedziso
Kudzidza nezvemishonga yemhuka ndiyo hwaro hwakakosha hwemabasa emazuva ano ekurapa mhuka. Nekunzwisisa maitiro eADME uye maparamita akadai seCmax, AUC, hafu yehupenyu, kubviswa kwemvura, uye huwandu hwekupararira, vanachiremba vemhuka vanogona kugadzira mishonga yakachengeteka, inoshanda zvakanyanya, uye ine mutoro. Pharmacokinetics inoitawo basa mukuchengetedza kuchengetedzeka kwechikafu nekudzora zvasara zvemishonga uye kuona nguva yekubviswa kwemishonga. Zvichienderera mberi, kubatanidzwa kwedata remishonga nepharmacodynamics, matekinoroji ekuongorora epamusoro, uye kuenzanisira kwevanhu kuchawedzera kunaka kwekurapa kwemhando dzakasiyana dzemhuka nezvinodiwa nenharaunda yakakura.
