Učinak pentadekapeptida BPC 157 i visokih doza diklofenaka na inducirani sindrom kratkoga crijeva [Massive small intestine resection, diclofenac, L-NAME, BPC 157 and L-arginine]

Lojo, Nermin (2015) Učinak pentadekapeptida BPC 157 i visokih doza diklofenaka na inducirani sindrom kratkoga crijeva [Massive small intestine resection, diclofenac, L-NAME, BPC 157 and L-arginine]. PhD thesis, Sveučilište u Zagrebu.

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Abstract

We focus on the disturbances present at 24h after massive (80%) small intestine resection in rats, poor anastomosis healing, failed intestine adaptation, gastrointestinal, liver and brain lesions; and then massive resection accompanied by diclofenac application (intraperitoneally, immediately after short bowel-creation. The other point of focus was the result of immediate therapy by stable gastric pentadecapeptide BPC 157, the NOS-substrate L-arginine; and aggravation by the NOS-blocker L-NAME, given alone and/or combined. After massive small intestine resection, we revealed a consequent threat of damage to the remaining intestine and the noxious effects of diclofenac and L-NAME application. These lead to the gradual exaggeration of lesions, from massive small intestine resection with mild mucosal lesions in the stomach and duodenum only, greater, but still mild liver lesions and rapid and severe cerebral/hypocampal lesions with progression concomitant to that of widespread severe lesions in the whole gastrointestinal tract, ultimately resulting with severe liver and further aggravated cerebellar nn/Purkinje cells lesions, alongside the cerebral/hippocampus lesions in rats. All these lesions (in particular, cerebral/Purkinje cells/hippocampus lesions) were more intensified in rats with L-NAME and diclofenac combined application, after massive small intestine resection. Locally, at the anastomosis, macro/microscopical (necrosis) presentation became worse in rats that received diclofenac or L-NAME and diclofenec combined, while already initiated (but limited, mostly muscle layers) habitual adaptation of the remaining small intestine is markedly attenuated and reversed in diclofenac rats well as diclofenac and L-NAME rats. Eventually, based on these agents' interactions, the observed can be a particular COX-NO-system inhibition phenomenon. Indicatively, BPC 157 completely rescued the massive intestinal resection, massive intestinal resection+diclofenac-, massive intestinal resection+diclofenac-L-NAME- rats. L-arginine in general, ameliorated only the L-NAME-aggravation of rats with massive intestinal resection+diclofenac+L-name-application.

Abstract in Croatian

Cilj: Na eksperimentalnom animalnom modelu učinili smo masivnu resekciju tankog crijeva uz primjenu visokih doza diklofenaka radi proučavanja učinka na crijevo, jetru i tkivo mozga sa osvrtom na NO sustav (NOS-supstrat, L-arginin, NOS-blokator, L-NAME), te protektivni učinak pentadekapeptida BPC 157. Materijali i metode: Tijekom 24 h promatrali smo štakore s opsežnom resekcijom tankog crijeva (oko 80 cm). Neposredno po zahvatu, životinjama je dan intraperitonealno (i) BPC 157 (10μg, 10ng); i/ ili (ii) diklofenak (12 mg) te BPC 157 (10μg), L-NAME (5 mg), L-arginin (100 mg) sami ili u kombinaciji radi promatranja učinka na NO sustav. Kontrolne životinje su dobile diklofenak te ekvivalentnu količinu 0,9% otopine NaCl-a (5 ml). Rezultati: Resekcija tankog crijeva samostalno uzrokuje postresekcijsku adaptacijsku reakciju svih slojeva preostalog tankog crijeva, a također i lezije na sluznici želuca i dvanaesnika, te lezije jetre i mozga. Aplikacija pentadekapeptida BPC 157 odmah po zahvatu poboljšava postresekcijsku adaptacijsku reakciju svih slojeva tankog crijeva. Apliciranjem diklofenaka postresekcijski dokazali smo, pogoršanje adaptacijskog mehanizma svih slojeva tankog crijeva, lošije cijeljenje crijevnih anastomoza, povećanje broja i dijametra lezija sluznice želuca i dvanaesnika te debelog crijeva. Također je verificirano i pogoršanje jetrenih i moždanih oštećenja, koja su pogoršana aplikacijom L-NAME, a smanjena primjenom L-arginina. Primjenom pentadekapeptida BPC 157 verificirano je dodatno poboljšanje promatranih lezija (poboljšano cijeljenje anastomoza, smanjeni broj gastrointestinalnih lezija kao i njihov dijametar, te blaža oštećenja jetrenog tkiva i blaže moždane lezije kod životinja kojima je apliciran BPC 157 (BPC 157, L-NAME+BPC 157, L-arginin+BPC 157, L-NAME+L-argnin+BPC 157)) u odnosu na kontrolne životinje. Zaključak: U ovom istraživanju, prikazali smo da nakon masivne resekcije tankog crijeva, u ranom poslijeoperacijskom razdoblju (24 h), primjena diklofenaka postresekcijski pogoršava cijeljenje anastomoze te adaptaciju svih slojeva tankog crijeva te povećava broj i veličinu lezija gastrointestinalnog trakta, jetre i moždanog tkiva. Također je dokazano da NO sustav modulira navedene procese, a primjena pentadekapeptida BPC 157 ublažava negativne učinke farmaklološke i kirurške nokse na organizam.

Item Type: Thesis (PhD)
Mentors:
Mentor
Sikirić, Predrag
Rašić, Žarko
Departments: Izvan medicinskog fakulteta
Depositing User: dr.med. Helena Markulin
University: Sveučilište u Zagrebu
Institution: Medicinski fakultet
Number of Pages: 53
Status: Unpublished
Creators:
CreatorsEmail
Lojo, NerminUNSPECIFIED
Date: 9 September 2015
Date Deposited: 16 Mar 2016 10:42
Last Modified: 16 Mar 2016 10:42
Subjects: /
Related URLs:
    URI: http://medlib.mef.hr/id/eprint/2554

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