Biochemical changes in the muscle tissue of rainbow trout (Oncorhynchus mykiss Walbaum) disinfected by chloramine-T

• Autorzy: Tkachenko H. , Grudniewska J.

Warianty tytułu

PL

Zmiany biochemiczne w tkance mięśniowej pstrąga tęczowego (Oncorhynchus mykiss Walbaum) po kąpielach dezynfekujących z chloraminą-T

• Języki publikacji: EN

Abstrakty

EN

Chloramine-T is a widely used disinfectant for the treatment of gill diseases of fish in freshwater, and more recently attention has turned to its use in seawater. However, despite the wide use of chloramine-T, few studies have examined its toxicity to fish. Therefore, the aim of the current study was to examine the effects of disinfection by Chloramine-T on the muscle tissue of rainbow trout (Oncorhynchus mykiss Walbaum) using oxidative stress biomarkers (levels of 2-thiobarbituric acid reactive substances and derivatives of oxidatively modified proteins) and biochemical enzymes’ activity (alanine- and aspartate aminotransferases (ALT and AST), lactate dehydrogenase (LDH)) to observe the its toxic effects. The endpoints obtained from this study will be useful to monitor the effects of disinfectant bathing with Chloramine-T for this species of fish. In the disinfectant group, rainbow trout (n = 11) were exposed to Chloramine-T in final concentration of 9 mg per L. Control group of trout (n = 11) was handled with water from basin in the same way as Chloramine-T exposed group. Fish were bathed with Chloramine-T for 20 min and repeated three times every 3 days. Two days after the last bathing fish were sampled to study. Our results showed that Chloramine-T bathing caused the decrease of the lipid peroxidation as well as ALT and AST activity and significant decrease of LDH activity (by 339%, p = 0.017) compared to controls. Chloramine-T markedly affects on lactate and pyruvate metabolism and resulted to decrease of LDH activity. Correlative analysis revealed that the lipid peroxidation level is correlated with ALT and AST activity in the muscle tissue of unhandled control group. In the muscle tissue of trout disinfected by Chloramine-T, LDH activity is correlated positively with ALT and AST activity. Thus, the skeletal muscles of fish play an important role in the processing of lactate through the gluconeogenic and glycogenic pathways including a greater potential for biosynthesis. Our studies indicated that Chloramine-T in dose of 9 mg per L could at least partly attenuate oxidative stress and can be used for prophylactic disinfecting treatment of rainbow trout. Oxidative stress and biochemical alterations could be effectively used as potential biomarkers of Chloramine-T toxicity to the fish in the warning signal for pharmaceutical exposure to aquatic organisms. However, more detailed studies on using of these specific biomarkers to monitor the disinfectant treatment in aquaculture are needed.

PL

Chloramina-T jest szeroko stosowanym środkiem dezynfekcyjnym i terapeutycznym do leczenia chorób skrzeli ryb w wodach słodkich i morskich. Jednak pomimo szerokiego stosowania tego środka, tylko w niewielu badaniach analizowano jego toksyczność dla ryb (Powell i Harris 2004). W związku z tym celem pracy było zbadanie wpływu dezynfektanta chloraminy-T na tkankę mięśniową pstrąga tęczowego (Oncorhynchus mykiss Walbaum) z wykorzystaniem biomarkerów stresu oksydacyjnego (poziom produktów reagujących z kwasem 2-tiobarbiturowym, aldehydowe i ketonowe pochodne oksydacyjnej modyfikacji białek) oraz przemian metabolicznych (aktywność aminotransferaz alaninowej i asparaginianowej, dehydrogenazy mleczanowej, stężenie mleczanu i pirogronianu). Uzyskane wyniki końcowe będą przydatne do monitorowania skutków dezynfekujących kąpieli z chloraminą-T dla tego gatunku ryb. Nasze wyniki wskazują, że chloramina-T znacznie obniża peroksydację lipidów na tle zmniejszenia aktywności aminotransferaz alaninowej i asparaginianowej oraz dehydrogenazy mleczanowej. Ponadto obniżona aktywność dehydrogenazy mleczanowej spowodowała zmniejszenie aktywności aminotransferaz. Zatem mięśnie szkieletowe ryb odgrywają ważną rolę w obróbce mleczanu przez glukoneogenezę i glikogenezę. Chloramina-T w dawce 9 mg na litr może przynajmniej częściowo złagodzić stres oksydacyjny w tkance mięśniowej pstrąga tęczowego i może być stosowana do dezynfekcji tego gatunku ryb. Konieczne są jednak bardziej szczegółowe badania dotyczące korzystania z tych specyficznych biomarkerów do monitorowania dezynfekcji w akwakulturze.

Słowa kluczowe

EN

biochemical change; muscle tissue; fish; rainbow trout; Oncorhynchus mykiss; disinfection; chloramine-T

• Wydawca: -
• Czasopismo: Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
• Rocznik: 2016
• Tom: 20
• Opis fizyczny: p.101-116,fig.,ref.

Twórcy

autor

Tkachenko H.

• Department of Zoology and Animal Physiology, Institute of Biology and Environmental Protection, Pomeranian University in Slupsk, Arciszewski 22B, 76-200 Slupsk, Poland

autor

Grudniewska J.

• Department of Salmonid Research, Stanislaw Sakowicz Inland Fisheries Institute, 83-330 Zukowo, Poland

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