Botulino toksinas urologijoje

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256 A. Èerniauskienë ISSN 1392 0995, ISSN 1648 9942 (online) LIETUVOS CHIRURGIJA Lithuanian Surgery 2005, 3(4), p. 256 261 Apþvalgos Botulino toksinas urologijoje Botulinum toxin in urology Auðra Èerniauskienë Vilniaus universiteto ligoninës Santariðkiø klinikos Gastroenterologijos, nefrologijos, urologijos ir abdominalinës chirurgijos klinika, Nefrologijos ir urologijos centras, I nefrourologijos skyrius, Santariðkiø g. 2, LT-08661 Vilnius El. paðtas: ausra.cerniauskiene@santa.lt Centre of Nephrology and Urology, Vilnius University Hospital Santariðkiø klinikos, Santariðkiø str. 2, LT-08661 Vilnius, Lithuania E-mail: ausra.cerniauskiene@santa.lt Ávadas/tikslas Botulino toksinas tai neurotoksinas, iðskiriamas anaerobinës bakterijos Clostridium botulinum. Klinikinëje praktikoje vartojamas botulino toksinas A (Dysport ). Ðio gydymo tikslas paralyþiuoti ðlapimo pûslës raumená arba raukà, kad sumaþëtø ðlapimo pûslës hiperaktyvumas arba palengvëtø ðlapinimasis. Straipsnio tikslas supaþindinti su literatûroje apraðomo botulino toksino veikimo mechanizmu ir pritaikymu minëtiems ðlapinimosi sutrikimams gydyti. Metodai Straipsnyje apþvelgiama naujausia literatûra apie botulino toksino vartojimà, gydant urologines ligas, skelbta MEDLINE, urologijos þurnaluose, 21 mokslinëje studijoje, ir praktinio BTX taikymo Prancûzijos Rouen urologijos skyriuje, 2004 metais patirtis. Rezultatai Suleidus BTX á rauko sritá, pagerëjimo efektas trunka 3 6 mënesius, suleidus á ðlapimo pûslës raumená 4 9 mënesius. Geri rezultatai, ávairiø atliktø tyrimø duomenimis, sudaro nuo 58% iki 88% gydant ðlapimo pûslës rauko dissinergijà, nuo 24% iki 28% hiperaktyvià ðlapimo pûslæ, 44 79% intersticiná cistità ir 50 85% nepiktybinæ prostatos hiperplazijà. Iðvados Naujas, minimaliai invazinis gydymo botulino toksinu A metodas sëkmingai naudojamas neurogeniniams ðlapinimosi sutrikimams, hiperaktyviai ðlapimo pûslei, intersticiniam cistitui ir nepiktybinei prostatos hiperplazijai gydyti. Daugybë atliktø tyrimø patvirtina gerus ðio gydymo rezultatus. Botulino toksino injekcijos ádomi chirurginio gydymo alternatyva. Reikðminiai þodþiai: botulino toksinas, neurogeninë ðlapimo pûslë, hiperaktyvi ðlapimo pûslë, detrusoriaus sfinkterio disinergija, gërybinë prostatos hiperplazija.

Botulino toksinas urologijoje 257 Background / objective Botulinum toxin (BTX), the neurotoxin of the anaerobic bacterium Clostridium botulium, specifically inhibits acetylcholine release at motor and vegetative nerve endings. Botulinum toxin-a is available for clinical use (Dysport ). It evokes paresis of the musculature. This paper reviews evidence-based practices in the use of BTX in common urologic conditions. Methods New literature data published in the MEDLINE, urologic journals, 21 studies on the current use of BTX in the treatment of urologic diseases as well as observations on practical application of BTX in the Rouen urologic division, France, in 2004 are reviewed in the article. Results Typically the beneficial effects of external sphincter injections last 3 6 months, while smooth bladder injections tend to persist even longer (4 9 months). Studies give good results in 58 88% (patients with detrusor sphincter dyssynergia), 24 28% patients with overactive bladder, 44 79% with interstitial cystitis, 50 85% with BPH. Conclusion BTX-A has been used with clinical success in urology in the treatment of bladder neurogenic, bladder non-neurogenic, interstitial cystitis and BPH. The studies published so far have demonstrated almost exclusively good results. Various parameters have been evaluated for the assessment of the results, mostly clinical data, residual urine and urodynamic examination. BTX injections are a minimally invasive treatment. Keywords: botulinum toxin, neurogenic bladder, overactive bladder, detrusor-sphincter dyssynergia, benign prostatic hyperplasia. Ávadas Botulino toksinas tai neurotoksinas, kurá iðskiria anaerobinës bakterijos Clostridium botulinum. Bakterijà rado Van Emergenas 1897 metais [1]. Ðiø bakterijø ðtamai gamina septynis skirtingus serotipus. Þmonëms farmakologiðkai aktyvûs yra A, B, E, F, G, serotipai neaktyvûs C ir D. 1920 metais pasirodë pirmieji darbai apie botulino toksinà A. Ðiuo metu gydymo tikslams plaèiai vartojamas serotipas A (Dysport), reèiau B [2]. Botulino toksinas A buvo kristalizuotas Amerikos ir Anglijos armijø labaratorijose 1946 metais. 1970 metais Danielis Drachmanas pritaikë botulino toksinà A hiperaktyviems raumenims gydyti [3]. 1977 metais Amerikos oftalmologas Alanas Scottas juo ëmë gydyti þvairumà [4]. Ðiuo metu botulino toksinas vartojamas ne tik neurologijoje, oftalmologijoje, bet ir otolaringologijoje, gastroenterologijoje, urologijoje, plastinëje chirurgijoje ir dermatologijoje. 1988 metais botulino toksi- nas pradëtas vartoti urologijoje hiperaktyviai ðlapimo pûslei ir vezikosfinkteriniams sutrikimams gydyti [5, 6]. Taip pat jis skiriamas nepiktybinei prostatos hiperplazijai ir intersticiniams cistitui gydyti [7 9]. Hiperaktyvi ðlapimo pûslë tai yra neslopinami ðlapimo pûslës raumens susitraukimai, kuriems bûdinga padaþnëjæs, primygtinis ar pasunkëjæs ðlapinimasis, liekamasis ðlapimas, ðlapimo nelaikymas arba ðiø simptomø derinys [7, 8]. Ðlapimo pûslës raumens hiperaktyvumà literatûroje aiðkina dvi teorijos miogeninë ir neurogeninë. Dël neurologiniø paþeidimø aktyvinami postgangliniai neuronai. Tai lemia ðlapimo pûslës lygiøjø raumenø savybiø pasikeitimus ir nevalingus jos susitraukimus. Smegenø kamieno ir stuburo paþeidimai sergant neurologinëmis ligomis sukelia ydingà ðlapimo pûslës rauko relaksacijos nebuvimà arba sustiprëjusá rauko susitraukimà, kai susitraukia ðlapimo pûslës raumuo. Vezikosfinkterinës koordinacijos sutrikimas lemia funkcinæ ðlapimo iðtekëjimo kliûtá. Dël to ðla-

258 A. Èerniauskienë pimo pûslë iðsituðtina ne iki galo (dizurija, liekamasis ðlapimas, vezikorenalinis refliuksas), kyla ðlapimo takø infekcija ir paþeidþiami inkstai. Tai ypaè bûdinga sergant iðsëtine skleroze ir esant paraplegijai [8 11]. Hiperaktyvià ðlapimo pûslæ turi 19% gyventojø. Ði patologija veikia gyvenimo kokybæ: apriboja fizinæ ir socialinæ veiklà, sutrikdo darbà ir poilsá, lytiná aktyvumà. Hiperaktyvios ðlapimo pûslës gydymui Europoje planuojama iðleisti 300 mln. eurø (apie 1 mlrd. litø). Ðiam sutrikimui gydyti vartojami vaistai (anticholinerginiai ir spazmolitikai Driptan, alfa-blokatoriai), taikoma fizioterapija (iðorinë ir ertminë elektrostimuliacija, kryþmens srities neuromoduliacija), chirurginis gydymas (endouretriniai protezai, sfinkterotomija, ðlapimo pûslës denervacija, kryþkaulio nervø blokados, neurostimuliatoriø implantavimas, ðlapimo pûslës padidinimas). Naudojama protarpinë kateterizacija arba savikateterizacija. Botulino toksino injekcijos yra ádomi chirurginio gydymo alternatyva [12 14]. Jø tikslas paralyþiuoti ðlapimo pûslës raumená arba sfinkterá, kad sumaþëtø ðlapimo pûslës hiperaktyvumas arba palengvëtø ðlapinimasis. Botulino toksino veikimo mechanizmas Botulino toksinas veikia taip (1 pav.): selektyviai blokuoja acetilcholino atsipalaidavimà ið nerviniø galûnëliø nervø ir raumenø jungtyje; blokuoja nervinio impulso perdavimà ið nervø galûnëliø á raumens skaidulas; sukelia raumens paralyþiø (maþdaug 9 mënesius). Vëliau gimsta naujos sinapsës su gretimø raumenø skaidulomis ir formuojasi naujos nervø ir raumenø jungtys [2, 9, 14, 15]. Botulino toksino vartojimo urologijoje indikacijos Botulino toksinas yra skiriamas nustaèius neurogeninæ arba hiperrefleksinæ ðlapimo pûslæ su vezikosfinkteriniais sutrikimais (dël stuburo virðkryþminës, kryþminës dalies arba smegenø kamieno paþeidimo arba neurologiniø ligø iðsëtinës sklerozës, Parkinsono ligos, mielito). Tai tokie ligoniai, kuriems nepadeda gydymas vaistais, kurie kateterizuojasi patys arba yra kateterizuojami. Taip pat gydoma hiperaktyvi ðlapimo pûslë, kuriai bûdinga poliakiurija ir primygtinis ðlapinimasis, jei paskirti anticholinerginiai vaistai ir elektrostimuliacija nepadëjo [2, 9, 16 18]. Suleidus botulino toksino, blokuojama neuroraumeninë ðlapimo pûslës arba rauko jungtis, kad sumaþëtø ðlapimo pûslës hiperaktyvumas arba palengvëtø ðlapinimasis. Po ðios procedûros padidëja ðlapimo pûslës talpa, neiðteka ðlapimas (suleidus á ðlapimo pûslës raumená). Suðvirkðtus botulino toksino á raukà, ligonis gali lengviau ðlapintis pats arba Valsalvos mëginio bûdu [2, 19 22]. Naujausioje literatûroje apraðoma, kad botulino toksinà A urologai skiria nepiktybiniam prostatos hiperplazijai ir intersticiniam cistitui gydyti [9]. Ligonio iðtyrimas Ligoniai prieð gydymà botulino toksinu turi bûti nuodugniai iðtirti. Atliekamas urologinis iðtyrimas (apþiûra, ðlapimo tyrimas, ðlapimo pasëlis, biocheminis kraujo tyrimas, prostatos tyrimas per rectum, inkstø, ðlapimo pûslës echoskopija, liekamojo ðlapimo tyrimas). Esant indikacijø papildomai atliekamos intraveninës urogramos, cistoskopija. Diagnozei nustatyti ypaè svarbûs urodinaminiai tyrimai [10, 11]. Registruojamas Tarpsinapsinis plyðys Acetilcholino pûslelë Egzocitozë 1 pav. Botulino toksino veikimo mechanizmas [2] Botulino toksinas Raumenø skaidulos

Botulino toksinas urologijoje 259 ir ávertinamas intraabdominalinis spaudimas, ðlapimo pûslës ir ðlaplës spaudimas, elektromiografijos duomenys (2 pav.). Jei ðlapinimosi ciklas normalus, pildant ðlapimo pûslæ, spaudimas joje pamaþu didëja iki ðlapinimosi, ðlaplëje iðlieka aukðtas spaudimas tol, kol atsidaro sfinkteris. Ðlapinantis didëja spaudimas ðlapimo pûslëje, krinta spaudimas ðlaplëje, atsipalaiduoja skersaruoþis raukas [2, 8]. Dël vezikosfinkteriniø sutrikimø nëra ðlapimo pûslës ir rauko suderintos tarpusavio veiklos. Urodinaminiais tyrimais nustatoma funkcinë obstrukcija (3 pav.). Bûdinga, kad ðlapinantis neatsipalaiduoja skersaruoþis raukas, vëluoja jo atsidarymas, ðlapinimosi kreivëse atsiranda papildomos smailës [10, 11]. Taip pat svarbus neurologinis iðtyrimas. Esant indikacijø, atliekamas chirurginis (pilvo) ir ginekologinis (dubens) iðtyrimas. Botulino toksino skyrimo bûdai Literatûroje apraðomi tokie botulino toksino vartojimo bûdai [2, 9, 23]: Injekcija á ðlapimo pûslës raumená atliekama nustaèius neurogeninæ, hiperaktyvià ðlapimo pûslæ arba intersticiná cistità. Botulino toksinas suleidþiamas cistoskopijos metu specialia adata. Ðvirkðèiama á penkias zonas, iðskyrus trikampá (trigonum), suleidþiama 100 300 vienetø Dysport (esant hiperaktyviai ðlapimo pûslei arba intersticiniam cistitui). Neurogeninei ðlapimo pûslës disfunkcijai gydyti suleidþiama 300 500 vienetø Dysport á 20 taðkø [2, 9]. Injekcija á rauko sritá atliekama nustaèius ðlapimo pûslës raumens ir rauko dissinergijà. Botulino toksino galima suleisti dviem bûdais. Per cistoskopà specialia adata á rauko vietà suleidþiama 150 vienetø Dysport á keturis taðkus ties 3, 6, 9, 12 val. Kitas bûdas 250 vienetø botulino toksino suleidþiama per tarpvietæ á rauko vietà (4 pav.). Rekomenduojama procedûrà kartoti tris kartus vieno mënesio tarpu arba kas tris mënesius, kol pasiekiamas efektas [2, 24]. Suðvirkðtus á prostatà, sukeliama selektyvi denervacija ir liaukos atrofija. Rekomenduojama á prostatà suleisti 200 vienetø Dysport. Klinikinis gydymo poveikis Gydymo botulino toksino injekcijomis veiksmingumas vertinamas pagal ðiuos kriterijus [2, 25 28]: ar sumaþëja liekamojo ðlapimo kiekis, susilpnëja poliakiurija, sumaþëja hiperrefleksija, pagerëja urodinaminiø tyrimø rodikliai; ar pagerëja paciento gyvenimo kokybë. 2 pav. Normalus ðlapinimosi ciklas [2] 3 pav. Vezikosfinkterinë disinergija: funkcinë obstrukcija [2]

260 A. Èerniauskienë Rezultatai Daugelio tyrëjø [5, 9, 10, 13, 26, 31] duomenimis, suleidus botulino toksino á rauko vietà, pagerëjimas trunka 3 6 mënesius, suleidus á ðlapimo pûslës raumená, 4 9 mënesius. Geri rezultatai, ávairiø atliktø tyrimø duomenimis, sudaro 58 88% gydant ðlapimo pûslës raumens ir rauko dissinergijà, iki 24 28% hiperaktyvià ðlapimo pûslæ, 44 79% intersticiná cistità ir 50 85% nepiktybinæ prostatos hiperplazijà [2, 18, 26, 29 33]. Literatûroje autoriai pateikia ávairius savo atliktø tyrimø gydant botulino toksinu duomenis (þr. lentelæ). Botulino toksino dozës ir nepageidaujami poveikiai Literatûros duomenimis, mirtina Dysport dozë á raumenis 6700 9000 vienetø, maksimali suðvirkðèiama dozë 1000 vienetø [2, 25]. Jei leidþiama daug kartø, kartais pasitaiko audiniø fibrozë, kontraktûra, denervacija. Anafilaksijos arba ðoko atvejø literatûroje neapraðyta. Kartais nurodomas raumenø silpnumas, nuovargio jausmas [2, 5, 9]. Pavieniais atvejais bûta hematomø, infekcijø, AKS pakitimø [18, 20, 26]. Botulino toksino negalima vartoti sergant miastenija, maitinanèioms motinoms, nëðèiosioms [2, 27]. Nepatartina vartoti kartu su aminozidais, curare, aminochinolonais, ciklosporinais [2, 28]. Iðvados 1. Botulino toksinas A sëkmingai vartojamas neurogeniniams ðlapinimosi sutrikimams, hiperaktyviai ðlapimo pûslei, intersticiniam cistitui ir nepiktybinei prostatos hiperplazijai gydyti. 2. Gydymo tikslas paralyþiuoti ðlapimo pûslës raumená arba raukà, kad sumaþëtø ðlapimo pûslës hiperaktyvumas arba palengvëtø ðlapinimasis. 3. Suleidus botulino toksino á ðlapimo pûslës raumená, padidëja ðlapimo pûslës talpa, neiðteka ðlapi- 4 pav. Botulino toksino suðvirkðtimas á tarpvietës sritá [2] Lentelë. Gydymo botulino toksinu rezultatai [29] Autorius Schurch, 1996 Petit, 1998 Pacientø skaièius (n) 24 17 Jost, 1999 31 Dozë 250 V DYSPORT 150 V DYSPORT 20 40 V DYSPORT Rezultatai Pagerëjo 21 24 pacientams 3 9 mën. Pagerëjo 10 17 pacientø 2 3 mën Geri rezultatai 19, vidutiniai 9 (58 88%), blogi 3 pacientams mas. Suleidus á raukà, ligonis gali lengviau ðlapintis pats. 4. Po gydymo sumaþëja liekamojo ðlapimo kiekis, susilpnëja poliakiurija, sumaþëja hiperrefleksija, pagerëja urodinaminiø tyrimø rodikliai ir paciento gyvenimo kokybë. 5. Daugybë atliktø tyrimø patvirtina gerus ðlapimo pûslës raumens bei rauko dissinergijos, intersticinio cistito, nepiktybinës prostatos hiperplazijos gydymo rezultatus. 6. Botulino toksino injekcijos ádomi chirurginio gydymo alternatyva. LITERATÛRA 1. Ipsen Biotech. Dysport. Dossier scientifique. Paris, 2002. 2. Ranoux D, Gury Ch. Manuel d utilisation pratique de la toxine botulique. Marseille: Solal, 2002. 3. Das Gupta BR, Sujiyama H. A common sub-unit structure in Clostridium botulinum type A, B and E toxins. Biochem Biophys Res Commun 1972; 48: 108 12.

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