Yini i-Pegvaliase: Ukusetshenziswa, Umthamo, Imiphumela Eceleni nokuningi

I-Pegvaliase iyindlela ekhethekile yokwelapha ngama-enzyme eyenzelwe ngqo abantu abadala abane-phenylketonuria (PKU), isimo esingavamile sezakhi zofuzo lapho umzimba ungakwazi ukwehlisa i-amino acid phenylalanine. Lo muthi usebenza ngokunikeza i-enzyme elahlekile edingwa umzimba wakho ukuze uqhubekisele phambili i-phenylalanine ngendlela efanele, okusiza ukwehlisa amazinga ayingozi egazini lakho.

Uma wena noma othile omkhathalelayo eno-PKU, ungase uzizwe ukhungathekile ngezinketho zokwelapha. I-Pegvaliase imelela intuthuko enkulu kubantu abangazange bazifinyelele amazinga e-phenylalanine aqondiwe ngokudla kuphela, inikeza ithemba lokuphatha kangcono isifo kanye nokuphucula izinga lempilo.

Yini i-Pegvaliase?

I-Pegvaliase iyinguqulo eyenziwe ngumuntu ye-enzyme ebizwa ngokuthi i-phenylalanine ammonia lyase engayitholi ngokwemvelo umzimba wakho uma une-PKU. Cabanga ngayo njengokunikeza umzimba wakho ithuluzi elilahlekile elidingayo ukuze lehlise i-phenylalanine evela kumaprotheni owadlayo.

Lo muthi uza njengoketshezi olucacile olujovwa ngaphansi kwesikhumba sakho, ngendlela efanayo naleyo abantu abanesifo sikashukela abasebenzisa ngayo i-insulin. Igama lomkhiqizo le-pegvaliase yi-Palynziq, futhi yenzelwe ngqo abantu abadala abaneminyaka engu-18 nangaphezulu abane-PKU.

Okuhlukile nge-pegvaliase ukuthi itholakala emthonjeni wamagciwane futhi yakhiwe ngokucophelela ukuze isebenze ngokuphepha emzimbeni womuntu. Lo muthi udlula ekuhlanzweni okukhulu ukuze kuqinisekiswe ukuthi uhlangabezana nezindinganiso eziqinile zokuphepha ngaphambi kokufinyelela iziguli.

Isetshenziselwani i-Pegvaliase?

I-Pegvaliase inikezwa kuphela abantu abadala abane-phenylketonuria (PKU) abamazinga e-phenylalanine yegazi labo ahlala ephezulu kakhulu naphezu kokulandela ukudla okuqinile okune-protein ephansi. I-PKU yisimo sezakhi zofuzo lapho umzimba wakho ungakwazi ukwehlisa kahle i-phenylalanine, i-amino acid etholakala ekudleni okuningi okuqukethe amaprotheni.

Lapho i-phenylalanine yakha egazini lakho, ingabangela izinkinga ezinkulu zempilo ezihlanganisa ukukhubazeka ngokwengqondo, ukuquleka, izinkinga zokuziphatha, nezinye izinkinga zemizwa. Abantu abane-PKU ngokuvamile balawula isimo sabo ngokudla okuqinile okukhawulela ukudla amaprotheni, kodwa le ndlela ayisebenzi kuwo wonke umuntu.

Udkt wakho angase ancome i-pegvaliase uma amazinga akho e-phenylalanine ehlala ngaphezu kwama-600 micromol/L (cishe ama-10 mg/dL) naphezu kwemizamo yakho emihle ngokuphatha ukudla. Umgomo uwukwehlisa lawa mazinga afinyelele ebangeni eliphephile, okungcono ngaphansi kwama-360 micromol/L (6 mg/dL).

Isebenza Kanjani I-Pegvaliase?

I-Pegvaliase isebenza ngokunikeza umzimba wakho nge-enzyme elahlekile ukuze ichithe i-phenylalanine. Kubantu abangenayo i-PKU, i-enzyme ebizwa ngokuthi i-phenylalanine hydroxylase iguqula i-phenylalanine ibe enye i-amino acid ebizwa ngokuthi i-tyrosine. Uma une-PKU, le enzyme ayisebenzi kahle.

I-Pegvaliase ithatha indlela ehlukile ngokusebenzisa i-enzyme ebizwa ngokuthi i-phenylalanine ammonia lyase, echitha i-phenylalanine ngendlela ehlukile yamakhemikhali. Le ndlela ehlukile isiza ukunciphisa inani le-phenylalanine elijikelezayo egazini lakho, ngisho nalapho udla ukudla okuqukethe amaprotheni.

Umuthi ubhekwa njengokwelashwa okuqinile nokuphumelelayo kwe-PKU lapho ukuphathwa kokudla kunganele. Kodwa-ke, ngokuvamile kuthatha izinyanga eziningana ukubona imiphumela ephelele, futhi uzodinga ukuhlolwa kwegazi njalo ukuze uqaphele amazinga akho e-phenylalanine futhi ulungise umthamo wakho ngokufanele.

Ngingayithatha Kanjani I-Pegvaliase?

I-Pegvaliase inikezwa njenge-injection ye-subcutaneous, okusho ukuthi uyiyela esicutshini esinamafutha ngaphansi kwesikhumba sakho. Ithimba lakho lokunakekelwa kwezempilo lizokufundisa ukuthi uzizela kanjani lezi zibhamu ngokuphepha nangokunethezeka ekhaya.

Izindawo ezivame kakhulu zokujova zihlanganisa ithanga lakho, ingalo engenhla, noma isisu. Kufanele ujikeleze izindawo zokujova ukuvimbela ukucasuka kwesikhumba futhi ugweme ukujova endaweni efanayo ngokuphindaphindiwe. Hlanza indawo yokujova ngotshwala ngaphambi kokujova ngakunye futhi usebenzise inaliti entsha ngaso sonke isikhathi.

Ungathatha i-pegvaliase ngaphandle kokudla, futhi akukho mingcele ethile yokudla ehlobene nokuthi ujova nini umuthi. Kodwa-ke, kufanele uqhubeke nokulandela ukudla kwakho kwe-PKU okubekiwe njengoba kuqondiswe ithimba lakho lokunakekelwa kwezempilo, ngisho nalapho usebenzisa i-pegvaliase.

Gcina ama-vials angavuliwe efrijini phakathi kuka-36°F kuya ku-46°F (2°C kuya ku-8°C). Ungawuqandi umuthi noma unyakazise i-vial ngamandla. Ngaphambi kokujova, vumela umuthi ukuthi ufinyelele izinga lokushisa legumbi cishe imizuzu engu-15-30 ukuze ukujova kube lula.

Kufanele Ngiyithathe Isikhathi Esingakanani I-Pegvaliase?

I-Pegvaliase ngokuvamile iyindlela yokwelapha yesikhathi eside okungenzeka ukuthi uzodinga ukuqhubeka nayo unomphela ukuze ugcine amazinga aphansi e-phenylalanine. Njengoba i-PKU iyisimo semvelo esiphila impilo yonke, ukuyeka umuthi kungenzeka kubangele amazinga akho e-phenylalanine ukuthi aphinde anyuke.

Udokotela wakho uzoqala ngomthamo ophansi futhi awunyuse kancane kancane ezinyangeni eziningana ngokusekelwe ekutheni umzimba wakho usabela kahle kangakanani futhi ukubekezelela kangakanani umuthi. Le nqubo, ebizwa ngokuthi i-dose titration, ingathatha izinyanga eziyi-6-12 noma ngaphezulu ukuze ufinyelele umthamo wakho ophelele.

Ukuhlolwa kwegazi okuvamile kuzosiza ithimba lakho lokunakekelwa kwezempilo ukuthi liqaphe amazinga akho e-phenylalanine futhi linqume ukuthi ngabe ukulungiswa komthamo kuyadingeka yini. Abanye abantu bangase badinge izinguquko zomthamo ngokuhamba kwesikhathi ngokusekelwe ezintweni ezinjengokushintsha kokudla, isisindo, noma indlela umzimba wabo osabela ngayo emuthini.

Ungalokothi uyeke ukuthatha i-pegvaliase ngokuzumayo ngaphandle kokukhuluma nodokotela wakho kuqala. Uma udinga ukuyeka umuthi nganoma yisiphi isizathu, ithimba lakho lokunakekelwa kwezempilo lizokusiza ukuthi uthuthukise uhlelo lokuphatha i-PKU yakho ngezinye izindlela.

Yiziphi Imiphumela Eceleni Ye-Pegvaliase?

Njengazo zonke izidakamizwa, i-pegvaliase ingabangela imiphumela emibi, nakuba kungewona wonke umuntu oyitholayo. Imiphumela emibi evame kakhulu ihlobene nokusabela endaweni yokujova kanye nokusabela komzimba wakho emuthini.

Ukuqonda okulindelekile kungakusiza ukuthi uzizwe ulungile futhi uqiniseka ngokuthi uqala le mithi. Nansi imiphumela emibi ongase uyithole, ihlelwe kusukela kwelivame kakhulu kuya kwelivamile kancane:

Imiphumela emibi evamile (ethinta ngaphezu kuka-10% wabantu):

• Ukusabela endaweni yokujova njengobubomvu, ukuvuvukala, ubuhlungu, noma ukulimala
• Ubuhlungu emalungeni noma ukuqina
• Ukusabela komzimba okusukela ekuqhumeni kwesikhumba okuncane kuya ezimpawini ezingathi sína
• Ukucindezeleka
• Ukukhathala noma ukuzizwa ukhathele
• Isicanucanu noma isisu esibuhlungu
• Ubuhlungu bemisipha
• Umkhuhlane noma izimpawu ezinjengomkhuhlane

Imiphumela emibi engavamile kodwa engaba yingozi:

• Ukusabela komzimba okukhulu (i-anaphylaxis) okudinga ukunakekelwa kwezempilo ngokushesha
• Ukusabela kwesikhumba okukhulu okuhlanganisa ukuqubuka, ama-hives, noma ukuxebuka
• Ukuphefumula kanzima noma ukukhwehlela
• Ukuvuvukala kobuso, izindebe, ulimi, noma umphimbo
• Ubuhlungu obukhulu emalungeni noma ukuvuvukala
• Umkhuhlane oqhubekayo noma izimpawu zokutheleleka

Izinkinga ezingavamile kodwa ezingathi sína:

• Ukusabela kwe-Autoimmune lapho amasosha omzimba wakho ehlasela izicubu ezinempilo
• Ukusabela okukhulu endaweni yokujova okungelapheki kahle
• Ushintsho ekubalweni kwamaseli egazi
• Ushintsho ekusebenzeni kwesibindi

Ukusabela okuningi endaweni yokujova kulula futhi kuthuthuka ezinsukwini ezimbalwa. Nokho, uma uthola ukusabela komzimba okukhulu, ukuphefumula kanzima, noma yiziphi izimpawu ezikukhathazayo, funa ukunakekelwa kwezempilo ngokushesha.

Ubani Ongafanele Athole I-Pegvaliase?

I-Pegvaliase ayifanele wonke umuntu one-PKU. Udokotela wakho uzohlola ngokucophelela ukuthi le mithi ikufanele yini ngokusekelwe ezintweni eziningana ezibalulekile.

Akufanele uthathe i-pegvaliase uma wazi ukuthi unokungezwani okukhulu nomuthi noma yiziphi izithako zawo. Lokhu kufaka phakathi ukusabela okukhulu kwangaphambilini ku-pegvaliase noma ezinye izindlela zokwelapha ezifana ne-enzyme.

Izimo ezithile zezokwelapha nezimo zidinga ukucatshangelwa okukhethekile ngaphambi kokuqala i-pegvaliase:

Izimo ezidinga ukuhlolwa ngokucophelela:

• Isifuba esikhulu noma ezinye izimo ezingathi sína zokuphefumula
• Umlando wokungezwani okukhulu nemithi noma ukudla
• Izifo ze-autoimmune ezisebenzayo
• Isifo esibi sesibindi noma sezinso
• Ukutheleleka okusebenzayo noma uhlelo lomzimba oluvikelekile olubuthakathaka
• Izifo zokuphuma igazi noma ukuthatha imithi yokunciphisa igazi

Abantu abakhethekile abadinga ukuqapha okwengeziwe:

• Abesifazane abakhulelwe noma abancelisa (idatha yokuphepha elinganiselwe iyatholakala)
• Abantu abahlela ukuhlinzwa noma izinqubo zamazinyo
• Labo abathatha imithi yokucindezela amasosha omzimba
• Abantu abanomlando wokungezwani nemithi

Ubudala nabo buyisici ngoba i-pegvaliase ivunyelwe kuphela kubantu abadala abaneminyaka engu-18 nangaphezulu. Izingane nentsha ene-PKU kufanele iqhubeke nokuphathwa kokudla kanye nezinye izindlela zokwelapha ezigunyaziwe kuze kube yilapho zifinyelela ebudaleni.

Igama Lomkhiqizo le-Pegvaliase

Igama lomkhiqizo le-pegvaliase yi-Palynziq, ekhiqizwa yi-BioMarin Pharmaceutical. Lolu okwamanje olukuphela komkhiqizo we-pegvaliase e-United States nakwamanye amazwe amaningi.

I-Palynziq iza ngamabhodlela okusetshenziswa kanye aqukethe ukugxila okuhlukene komuthi. Udokotela wakho uzoqoka ukugxila okuthile kanye nomthamo olungile wezidingo zakho.

Njengoba i-pegvaliase iyimithi ekhethekile yesimo esingavamile, ngokuvamile itholakala kuphela ngezitolo zemithi ezikhethekile ezinolwazi lokuphatha izindlela zokwelapha ezinama-enzyme. Ithimba lakho lezempilo lizosiza ukuxhumanisa ukuthola imithi yakho ngeziteshi ezifanele.

Ezinye izindlela ze-Pegvaliase

Ngenkathi i-pegvaliase iyona kuphela i-enzyme replacement therapy etholakalayo ye-PKU, zikhona ezinye izindlela zokwelapha udokotela wakho angazicabangela ngokuya ngesimo sakho nezidingo zakho.

Enye indlela enkulu ye-pegvaliase isalokhu iyindlela yokudla eqinile, ebandakanya ukulandela ukudla okunama-protein amancane nokusebenzisa ukudla okukhethekile kwezokwelapha okwenzelwe abantu abane-PKU. Le ndlela isebenza kahle kubantu abaningi kodwa idinga izinguquko ezinkulu zokuphila nokuqapha ngokucophelela.

Ezinye izinketho zokwelapha ezingase zicatshangelwe zihlanganisa:

\n
• I-Sapropterin (Kuvan) - umuthi ongase usize abanye abantu abanezinhlobo ezithile ze-PKU ukucubungula i-phenylalanine kangcono
\n
• Izithasiselo ezinkulu ze-amino acid ezingathathi hlangothi ezingasiza ukunciphisa ukumuncwa kwe-phenylalanine
\n
• Ukudla kwezokwelapha okusekelwe ku-Glycomacropeptide okunikeza amaprotheni anokuqukethwe okuphansi kwe-phenylalanine
\n
• Ukwelashwa okusemqoka okutadishwa ezivivinyweni zomtholampilo
\n

Ithimba lakho lezempilo lizosebenza nawe ukunquma inhlanganisela engcono kakhulu yokwelashwa ngokusekelwe emazingeni akho e-phenylalanine, izintandokazi zokudla, indlela yokuphila, nokuthi usabela kanjani kahle ezindleleni ezihlukene.

Ingabe i-Pegvaliase Ingcono Kune-Sapropterin?

I-Pegvaliase ne-sapropterin (Kuvan) zisebenza ngezindlela ezihlukene futhi zivame ukusetshenziselwa izinhlobo ezihlukene zeziguli ze-PKU, ngakho ukuqhathanisa ngqo akulula. Ukukhetha

I-Pegvaliase, ngakolunye uhlangothi, isebenza kubantu abaningi abane-PKU kungakhathaliseki uhlobo lwabo lwezakhi zofuzo, kodwa idinga imijovo futhi inengozi enkulu yokungezwani komzimba. Ivamise ukucatshangelwa uma ukuphathwa kokudla kanye ne-sapropterin kungazange kufeze amazinga e-phenylalanine alindelekile.

Abanye abantu bangazuza ekusebenziseni imithi yomibili ndawonye ngaphansi kokuqondiswa kwezokwelapha okucophelelayo. Udokotela wakho uzosiza ekunqumeni ukuthi iyiphi indlela efaneleka kakhulu esimweni sakho esithile ngokusekelwe ekuhlolweni kwezakhi zofuzo, amazinga e-phenylalanine yamanje, kanye nemigomo yakho yokwelashwa.

Imibuzo Evame Ukubuzwa Mayelana ne-Pegvaliase

Ingabe i-Pegvaliase iphephile ngesikhathi sokukhulelwa?

Ukuvikeleka kwe-pegvaliase ngesikhathi sokukhulelwa akukatholakali ngokugcwele ngezifundo ezinkulu zomtholampilo. Kodwa-ke, ukugcina amazinga afanele e-phenylalanine ngesikhathi sokukhulelwa kubalulekile empilweni yomama kanye nokukhula kwengane.

Amazinga aphezulu e-phenylalanine ngesikhathi sokukhulelwa angabangela ukukhubazeka okukhulu kokuzalwa okuhlanganisa ukukhubazeka kwengqondo, izinkinga zenhliziyo, nezinkinga zokukhula enganeni esakhula. Lesi simo sibizwa nge-maternal PKU syndrome, futhi singenzeka ngisho noma ingane ingenayo i-PKU.

Uma ukhulelwe noma uhlela ukukhulelwa ngenkathi uthatha i-pegvaliase, sebenzisana eduze nochwepheshe wakho we-PKU kanye nodokotela wakho wezifo zabesifazane. Bazosiza ekulinganiseni izingozi nezinzuzo zokuqhubeka nokwelashwa uma kuqhathaniswa nokushintshela ekuphathweni kokudla okuqinile ngesikhathi sokukhulelwa.

Ngingenzani uma ngiphuthelwa ngisebenzisa i-Pegvaliase eningi kakhulu?

Uma ngengozi ujova i-pegvaliase eningi kunaleyo ebekiwe, xhumana nomhlinzeki wakho wezempilo ngokushesha noma shayela isikhungo sakho sendawo sokulawula ubuthi. Ungalindi ukubona ukuthi ngabe izimpawu ziyavela yini, njengoba ukunakekelwa kwezokwelapha okusheshayo kubalulekile nganoma yikuphi ukweqisa kwemithi.

Ngenkathi ukuthatha i-pegvaliase eningi kakhulu kungenzeki ukuthi kubangele imiphumela esongela impilo, kungakhuphula ingozi yakho yemiphumela emibi efana nokusabela okukhulu endaweni yokujova noma ukusabela komzimba. Udokotela wakho angase afune ukukuqapha eduze noma alungise isimiso sakho sokulinganisa esizayo.

Ukuvimbela ukweqisa ngengozi, njalo hlola kabili umthamo wakho obekiwe ngaphambi kokujova, sebenzisa ukugxila okulungile komuthi, futhi ugcine irejista yokulinganisa ukuze ulandelele ukuthi uthathe nini umuthi wakho. Uma ungaqiniseki ngomthamo wakho, xhumana nethimba lakho lezempilo ngaphambi kokujova.

Kufanele Ngenzeni Uma Ngedlula Umthamo We-Pegvaliase?

Uma udlula umthamo we-pegvaliase, yithathe ngokushesha lapho ukhumbula, ngaphandle uma sekuseduze isikhathi somthamo wakho olandelayo ohleliwe. Kuleso simo, weqa umthamo owedluliwe bese uqhubeka nesimiso sakho sokulinganisa esivamile.

Ungalokothi uthathe umthamo ophindwe kabili ukuze ulungise okwedluliwe, ngoba lokhu kungakhuphula ingozi yakho yemiphumela emibi. Ukudlula umthamo ngezikhathi ezithile akunakwenzeka ukuthi kubangele izinkinga ngokushesha, kodwa zama ukugcina isimiso sakho esivamile ngangokunokwenzeka ukuze uthole imiphumela engcono kakhulu.

Uma uvame ukukhohlwa imithamo, cabanga ukusetha izikhumbuzi zocingo, usebenzise umhleli womuthi, noma ucele amalungu omndeni ukuthi akusize ukukukhumbuza. Ukulinganisa okuqhubekayo kubalulekile ekugcineni amazinga e-phenylalanine azinzile.

Ngingayeka Nini Ukuthatha I-Pegvaliase?

Akufanele uyeke ukuthatha i-pegvaliase ngaphandle kokuxoxa ngayo kuqala nethimba lakho lezempilo. Njengoba i-PKU iyisimo esihlala impilo yonke, ukuyeka i-pegvaliase cishe kuzobangela amazinga akho e-phenylalanine ukuthi aphinde anyuke, okungenzeka kuholele ezinkingeni zempilo.

Kungase kube nezimo lapho udokotela wakho encoma ukuyeka okwesikhashana i-pegvaliase, njengasezikhathini zokugula okukhulu, ngaphambi kokuhlinzwa, noma uma uthola imiphumela emibi engathi sína. Kulezi zimo, ithimba lakho lezempilo lizokusiza ukuphatha i-PKU yakho ngezindlela ezinye ngesikhathi sokuphumula kokwelashwa.

Uma ucabanga ukuyeka i-pegvaliase ngenxa yemiphumela emibi noma ezinye izinto ezikhathazayo, khuluma ngokukhululeka nodokotela wakho ngalokho okwenzekayo. Bangase bakwazi ukulungisa umthamo wakho, banikeze ukwesekwa okwengeziwe ekuphatheni imiphumela emibi, noma bahlole ezinye izindlela zokwelapha.

Ngingahamba ngenkathi ngithatha i-Pegvaliase?

Yebo, ungahamba ngenkathi uthatha i-pegvaliase, kodwa kudinga ukuhlela okuthile ukuze uqinisekise ukuthi unempahla eyanele yemithi futhi ungagcina izimo zokugcina ezifanele. Hlala uphethe imithi eyengeziwe uma kwenzeka ukubambezeleka kohambo noma izimo ezingalindelekile.

Uma undiza, pakisha i-pegvaliase yakho emthwalweni wakho wokuqala kanye nencwadi kadokotela echaza isidingo sakho sezokwelapha semithi kanye nezinto zokujova. Lokhu kusiza ukugwema izinkinga zabezokuphepha esikhumulweni sezindiza futhi kuqinisekisa ukuthi imithi yakho ayilahleki nemithwalo ehloliwe.

Ukuze uhambe phesheya, cwaninga imithetho yokungenisa imithi kadokotela ezweni oya kulo. Amanye amazwe adinga imibhalo ekhethekile noma anezithiyo emithini ethile, ngakho xhumana ne-embassy yabo noma i-consulate kusengaphambili ukuze ugweme izinkinga.