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001-es BibID:	BIBFORM108041
035-os BibID:	(WOS)000784250800008 (Scopus)85125934386
Első szerző:	Georgieva, Elenka
Cím:	Biomarkers for pollution in caged mussels from three reservoirs in Bulgaria : a pilot study / Elenka Georgieva, László Antal, Stela Stoyanova, Desislava Arnaudova, Iliana Velcheva, Ilia Iliev, Tonka Vasileva, Veselin Bivolarski, Vesela Mitkovska, Tsenka Chassovnikarova, Borislava Todorova, Ifeanyi Emmanuel Uzochukwu, Krisztián Nyeste, Vesela Yancheva
Dátum:	2022
ISSN:	2405-8440
Megjegyzések:	The mussel-watch concept was firstly proposed in 1975, which was later adopted by several international monitoring programs worldwide. However, for the very first time, a field experiment with caged mussels was performed in three reservoirs in Bulgaria to follow the harmful effects of sub-chronic pollution (30 days) of metals, trace, and macro-elements, as well as some organic toxicants, such as polybrominated diphenyl ethers and chlorinated paraffins. Therefore, we studied the biometric indices, histochemical lesions in the gills, biochemical changes in the digestive glands (antioxidant defense enzymes, such as catalase, glutathione reductase, and glutathione peroxidase; metabolic enzymes, such as lactate dehydrogenase, alanine aminotransferase, and aspartate aminotransferase, and the neurotransmitter cholinesterase), in addition to the DNA damage in the Chinese pond mussel, Sinanodonta woodiana (Lea, 1834) in Kardzhali, Studen Kladenets and Zhrebchevo reservoirs in Bulgaria. Significant correlation trends between the pollution levels, which we reported before, and the biomarker responses were established in the current paper. Overall, we found that both tested organs were susceptible to pollution-induced oxidative stress. The different alterations in the selected biomarkers in the caged mussels compared to the reference group were linked to the different kinds and levels of water pollution in the reservoirs, and also to the simultaneously conducted bioaccumulation studies.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Heliyon. - 8 : 3 (2022), p. 1-14. -
További szerzők:	Antal László (1984-) (hidrobiológus, biológus-ökológus) Stoyanova, Stela Arnaudova, Desislava Velcheva, Iliana Iliev, Ilia Vasileva, Tonka Bivolarski, Veselin Mitkovska, Vesela Chassovnikarova, Tsenka Todorova, Borislava Uzochukwu, Ifeanyi Emmanuel (1989-) (Environmental Scientist/Animal Scientist) Nyeste Krisztián József (1993-) (hidrobiológus) Yancheva, Vesela
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM130818
Első szerző:	Stoyanova, Stela
Cím:	Kidneys Under Siege: Pesticides Impact Renal Health in the Freshwater Fish Common Carp (Cyprinus carpio Linnaeus, 1758) / Stela Stoyanova, Elenka Georgieva, Eleonora Kovacheva, László Antal, Dóra Somogyi, Ifeanyi Emmanuel Uzochukwu, László Nagy, Krisztián Nyeste, Vesela Yancheva
Dátum:	2025
ISSN:	2305-6304
Megjegyzések:	This study evaluated the histopathological impact of three commonly used pesticides- pirimiphos-methyl, propamocarb hydrochloride, and 2,4-dichlorophenoxyacetic acid (2,4-D)-on the kidneys of common carp (Cyprinus carpio Linnaeus, 1758) after 96-h acute exposure. The histopathological analysis demonstrated that all three tested pesticides induced structural changes. The histopathological changes were assessed using a semiquantitative scoring system and categorised into circulatory, degenerative, proliferative, and inflammatory alterations. While circulatory alterations were absent in all treatments, clear and statistically significant degenerative, proliferative, and inflammatory responses were recorded, which escalated with increasing pesticide concentrations. Additionally, various statistical analyses were conducted to evaluate the lesions in kidney structure and function. Before the statistical analysis, normality and variance homogeneity were assessed using the Shapiro?Wilk and Levene's tests, respectively. Due to non-normal data distribution, non-parametric methods were applied. Hence, the non-parametric statistical methods showed distinct group-level differences in the kidney damage indices. The Kruskal?Wallis test revealed significant differences across treatments (p < 0.001), and Mann?Whitney U tests identified specific pairwise differences. The degenerative and proliferative lesions were most prominent in fish exposed to 2,4-D at 100 ?g/L (IK = 34), followed by pirimiphos-methyl and propamocarb hydrochloride. Inflammatory changes were mainly observed in the pirimiphos-methyl groups. The histopathological lesions were concentration-dependent, with 2,4-D causing irreversible renal damage at higher concentrations. These findings highlight the nephrotoxic risks posed by common pesticides and validate that the use of histopathological indices, combined with robust non-parametric testing, provides a reliable approach to evaluating organ-specific pesticide toxicity. These biomarkers offer sensitive early warning indicators of environmental risk, reinforcing the suitability of common carp as a model species for ecotoxicological assessment.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk common carp kidney histological biomarkers pesticides pollution
Megjelenés:	Toxics. - 13 : 7 (2025), p. 1-25. -
További szerzők:	Georgieva, Elenka Kovacheva, Eleonora Antal László (1984-) (hidrobiológus, biológus-ökológus) Somogyi Dóra (1996-) (hidrobiológus) Uzochukwu, Ifeanyi Emmanuel (1989-) (Environmental Scientist/Animal Scientist) Nagy László (2000-) (hidrobiológus) Nyeste Krisztián József (1993-) (hidrobiológus) Yancheva, Vesela
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM133701
Első szerző:	Yancheva, Vesela
Cím:	Do polybrominated diphenyl ethers cause adverse effects in the freshwater bioindicator zebra mussel (Dreissena polymorpha Pallas, 1771)? An acute and subchronic biomarker assessment / Yancheva, Vesela; Stoyanova, Stela; Georgieva, Elenka; Arnaudova, Desislava; Iliev, Ilia; Vasileva, Tonka; Bivolarski, Veselin; Uzochukwu, Ifeanyi Emmanuel; Nagy, László; Somogyi, Dóra; Antal, László; Nyeste, Krisztián
Dátum:	2025
ISSN:	0166-445X
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk PBDEs Zebra mussels Bioindicators Biomarkers Water contamination
Megjelenés:	Aquatic Toxicology. - 287 (2025), p. 1-13. -
További szerzők:	Stoyanova, Stela Georgieva, Elenka Arnaudova, Desislava Iliev, Ilia Vasileva, Tonka Bivolarski, Veselin Uzochukwu, Ifeanyi Emmanuel (1989-) (Environmental Scientist/Animal Scientist) Nagy László (2000-) (hidrobiológus) Somogyi Dóra (1996-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus) Nyeste Krisztián József (1993-) (hidrobiológus)
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