التفاصيل البيبلوغرافية
| العنوان: |
Contribution to the study of the changes in the gills of zebrafish (Danio rerio) when exposed to dioxin. |
| العنوان البديل: |
Prilog istraživanju promjena na škrgama zebrice (Danio rerio) prilikom izloženosti dioksinu. |
| المؤلفون: |
NAVAS, Jose M.1 an3nallj@uco.es, DIZ, Andres M.1, MOYANO, Rosario2, VÁZQUEZ-AUTÓN, Jose M.3, AYALA, Maria D.3, GARCÍA-MONTERDE, Jose1, BLANCO, Alfonso1 |
| المصدر: |
Acta Adriatica. Dec2016, Vol. 57 Issue 2, p281-293. 13p. |
| مصطلحات موضوعية: |
*ZEBRA danio, *PHYSIOLOGICAL effects of dioxins, *GILLS, *TETRACHLORODIBENZODIOXIN, *HYPERPLASIA, *CELL morphology, *PHYSIOLOGY |
| الملخص (بالإنجليزية): |
This study determined cell changes in the gills of zebrafish (Danio rerio, Hamilton, 1822) as a result of a dietary supply of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). 50 zebrafish were divided into five groups, one control group and four experimental ones. The experimental groups were supplied 10, 40, 100 and 270 ng/day/fish TCDD, respectively. Structural, ultrastructural and morphometric studies of the fish gill were carried out, indicating that, in low concentrations, fish gills presented hyperemia with progressive erosion of the endothelium of the capillaries resulting in edema and microhaemorrhages. In the non-respiratory gill, in those groups with low concentrations, it could be observed that the chloride cells presented hypertrophy as a result of dilatation of the intracellular canal and swelling of the microvilli, losing their activity in the degradation of chemical substances (according to some authors) in those groups with a higher concentration. Mucous cells presented hyperplasia and hypertrophy. The sensory buds were not directly affected, but, due to the presence of interstitial edema, swelling of the supporting cells occurred without the involvement of the neurosensory cells. We concluded that dioxins affect the gills to a greater or lesser extent depending on their concentration in the fish's diet, which alters their functionality. [ABSTRACT FROM AUTHOR] |
| Abstract (Croatian): |
Ovim istraživanjem utvrđene su promjene na stanicama škrga zebrice (Danio rerio, Hamilton, 1822) kao rezultat hranjena 2,3,7,8 tetraklorodibenzo p-dioksinom (TCDD). Pedeset jedinki zebrice podijeljeno je u pet grupa, jednu kontrolnu grupu i četiri eksperimentalne. Eksperimentalnim grupama davano je 10, 40, 100 i 270 ng/riba/dan TCDD. Provedena su strukturalna, ultrastrukturalna i morfološka istraživanja škrga ribe, ukazujući da su škrge riba pokazivale hiperemiju s progresivnom erozijom endotel kapilara koja je rezultirala edemima i mikrokrvarenjima. Kod grupa kojima je dana manja koncentracija, u škrgama koje ne služe za disanje može se primijetiti da kloridne stanice pokazuju hipertrofiju kao posljedicu dilatacije međustaničnog kanala i oticanje mikroresica kojima se smanjuje aktivnost tijekom razgradnje kemijskih tvari (prema mišljenjima nekih autora) u onim grupama koje su bile izložene većim koncentracijama. Mukozne stanice pokazuju hiperplaziju i hipertrofiju. Osjetni pupoljci nisu bili izravno pogođeni, ali, zbog prisutnosti intersticijskog edema, oticanja potpornih stanica bez uključivanja neurosenzornih stanica. Zaključak je da dioksini utječu na škrge u većoj ili manjoj mjeri ovisno o njihovoj koncentraciji u ishrani ribe, što mijenja njihovu funkcionalnost. [ABSTRACT FROM AUTHOR] |
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