14 results on '"histopathological markers"'
Search Results
2. Biomarkers for Kidney-Transplant Rejection: A Short Review Study.
- Author
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Sharaby, Israa, Alksas, Ahmed, Abou El-Ghar, Mohamed, Eldeeb, Mona, Ghazal, Mohammed, Gondim, Dibson, and El-Baz, Ayman
- Subjects
BIOMARKERS ,KIDNEY transplantation ,KIDNEY failure ,GENOMICS ,HISTOPATHOLOGY - Abstract
Kidney transplantation is the preferred treatment for end-stage renal failure, but the limited availability of donors and the risk of immune rejection pose significant challenges. Early detection of acute renal rejection is a critical step to increasing the lifespan of the transplanted kidney. Investigating the clinical, genetic, and histopathological markers correlated to acute renal rejection, as well as finding noninvasive markers for early detection, is urgently needed. It is also crucial to identify which markers are associated with different types of acute renal rejection to manage treatment effectively. This short review summarizes recent studies that investigated various markers, including genomics, histopathology, and clinical markers, to differentiate between different types of acute kidney rejection. Our review identifies the markers that can aid in the early detection of acute renal rejection, potentially leading to better treatment and prognosis for renal-transplant patients. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. Venous Wall of Patients with Chronic Venous Disease Exhibits a Glycolytic Phenotype.
- Author
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Fraile-Martinez, Oscar, García-Montero, Cielo, Alvarez-Mon, Miguel Ángel, Gomez-Lahoz, Ana M., Monserrat, Jorge, Llavero-Valero, Maria, Ruiz-Grande, Fernando, Coca, Santiago, Alvarez-Mon, Melchor, Buján, Julia, García-Honduvilla, Natalio, Saz, Jose V., and Ortega, Miguel A.
- Subjects
- *
CHRONICALLY ill , *PHENOTYPES , *VARICOSE veins , *GLUCOSE transporters , *PROTEIN expression - Abstract
Chronic venous disease (CVeD) is a rising medical condition characterized by a broad spectrum of disorders in the venous system. Varicose veins (VVs) represent a frequent clinical manifestation of CVeD, particularly in the lower limbs. Prior histopathological studies have defined a set of alterations observed in the venous wall of patients with VVs, affecting their structure and behavior. Metabolic changes in the veins appear to be a critical biological mechanism aiding our understanding of the pathogenesis of CVeD. In this sense, previous studies have identified a potential role of a glycolytic phenotype in the development of different vascular disorders; however, its precise role in CVeD remains to be fully explored. Thus, the aim of the present study was to analyze the gene and protein expression of glucose transporter 1 (GLUT-1) and the glycolytic enzymes PGK-1, ALD, GA3PDH and LDH in the VVs of patients with CVeD (n = 35) in comparison to those expressed in healthy subjects. Our results display enhanced gene and protein expression of GLUT-1, PGK-1, ALD, GA3PDH and LDH in patients with CVeD, suggesting a glycolytic switch of the venous tissue. Greater understanding of the impact of this glycolytic switch in patients with CVeD is required to define a possible pathophysiological role or therapeutic implications of these changes. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
4. Biomarkers for Kidney-Transplant Rejection: A Short Review Study
- Author
-
Israa Sharaby, Ahmed Alksas, Mohamed Abou El-Ghar, Mona Eldeeb, Mohammed Ghazal, Dibson Gondim, and Ayman El-Baz
- Subjects
acute-mediated rejection (AMR) ,biomarkers ,histopathological markers ,kidney-transplant rejection ,renal rejection ,Biology (General) ,QH301-705.5 - Abstract
Kidney transplantation is the preferred treatment for end-stage renal failure, but the limited availability of donors and the risk of immune rejection pose significant challenges. Early detection of acute renal rejection is a critical step to increasing the lifespan of the transplanted kidney. Investigating the clinical, genetic, and histopathological markers correlated to acute renal rejection, as well as finding noninvasive markers for early detection, is urgently needed. It is also crucial to identify which markers are associated with different types of acute renal rejection to manage treatment effectively. This short review summarizes recent studies that investigated various markers, including genomics, histopathology, and clinical markers, to differentiate between different types of acute kidney rejection. Our review identifies the markers that can aid in the early detection of acute renal rejection, potentially leading to better treatment and prognosis for renal-transplant patients.
- Published
- 2023
- Full Text
- View/download PDF
5. The Impact of Histopathological Features on the Prognosis of Oral Squamous Cell Carcinoma: A Comprehensive Review and Meta-Analysis.
- Author
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Dolens, Eder da Silva, Dourado, Mauricio Rocha, Almangush, Alhadi, Salo, Tuula A., Gurgel Rocha, Clarissa Araujo, da Silva, Sabrina Daniela, Brennan, Peter A., and Coletta, Ricardo D.
- Subjects
HISTOPATHOLOGY ,SQUAMOUS cell carcinoma ,OVERALL survival ,FIXED effects model ,SURGICAL margin - Abstract
Objective: Over many decades, studies on histopathological features have not only presented high-level evidence of contribution for treatment directions and prognosis of oral squamous cell carcinoma (OSCC) but also provided inconsistencies, making clinical application difficult. The 8th TNM staging system of OSCC has acknowledged the importance of some histopathological features, by incorporating depth of invasion (DOI) to T category and extranodal extension (ENE) to N category. The aim of this systematic review with meta-analysis is to determine the most clinically relevant histopathological features for risk assessment and treatment planning of OSCC and to elucidate gaps in the literature. Methods: A systematic review was conducted using PRISMA guidelines, and the eligibility criteria were based on population, exposure, comparison, outcome, and study type (PECOS). PubMed, Cochrane, Scopus, and Web of Science were searched for articles exploring the impact of histopathological features on OSCC outcomes with Cox multivariate analysis. Pooled data were subjected to an inverse variance method with random effects or fixed effect model, and the risk of bias was evaluated using quality in prognosis studies (QUIPS). Quality of evidence was assessed with the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria. Results: The study included 172 articles published from 1999 to 2021. Meta-analyses confirmed the prognostic potential of DOI, ENE, perineural invasion, lymphovascular invasion, and involvement of the surgical margins and brought promising results for the association of bone invasion, tumor thickness, and pattern of invasion with increased risk for poor survival. Although with a small number of studies, the results also revealed a clinical significance of tumor budding and tumor-stroma ratio on predicted survival of patients with OSCC. Most of the studies were considered with low or moderate risk of bias, and the certainty in evidence varied from very low to high. Conclusion: Our results confirm the potential prognostic usefulness of many histopathological features and highlight the promising results of others; however, further studies are advised to apply consistent designs, filling in the literature gaps to the pertinence of histopathological markers for OSCC prognosis. Systematic Review Registration: International Prospective Register of Systematic Reviews (PROSPERO), identifier CRD42020219630. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
6. The Impact of Histopathological Features on the Prognosis of Oral Squamous Cell Carcinoma: A Comprehensive Review and Meta-Analysis
- Author
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Eder da Silva Dolens, Mauricio Rocha Dourado, Alhadi Almangush, Tuula A. Salo, Clarissa Araujo Gurgel Rocha, Sabrina Daniela da Silva, Peter A. Brennan, and Ricardo D. Coletta
- Subjects
histopathological markers ,prognosis ,oral cancer ,systematic review ,meta-analysis ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
ObjectiveOver many decades, studies on histopathological features have not only presented high-level evidence of contribution for treatment directions and prognosis of oral squamous cell carcinoma (OSCC) but also provided inconsistencies, making clinical application difficult. The 8th TNM staging system of OSCC has acknowledged the importance of some histopathological features, by incorporating depth of invasion (DOI) to T category and extranodal extension (ENE) to N category. The aim of this systematic review with meta-analysis is to determine the most clinically relevant histopathological features for risk assessment and treatment planning of OSCC and to elucidate gaps in the literature.MethodsA systematic review was conducted using PRISMA guidelines, and the eligibility criteria were based on population, exposure, comparison, outcome, and study type (PECOS). PubMed, Cochrane, Scopus, and Web of Science were searched for articles exploring the impact of histopathological features on OSCC outcomes with Cox multivariate analysis. Pooled data were subjected to an inverse variance method with random effects or fixed effect model, and the risk of bias was evaluated using quality in prognosis studies (QUIPS). Quality of evidence was assessed with the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria.ResultsThe study included 172 articles published from 1999 to 2021. Meta-analyses confirmed the prognostic potential of DOI, ENE, perineural invasion, lymphovascular invasion, and involvement of the surgical margins and brought promising results for the association of bone invasion, tumor thickness, and pattern of invasion with increased risk for poor survival. Although with a small number of studies, the results also revealed a clinical significance of tumor budding and tumor-stroma ratio on predicted survival of patients with OSCC. Most of the studies were considered with low or moderate risk of bias, and the certainty in evidence varied from very low to high.ConclusionOur results confirm the potential prognostic usefulness of many histopathological features and highlight the promising results of others; however, further studies are advised to apply consistent designs, filling in the literature gaps to the pertinence of histopathological markers for OSCC prognosis.Systematic Review RegistrationInternational Prospective Register of Systematic Reviews (PROSPERO), identifier CRD42020219630.
- Published
- 2021
- Full Text
- View/download PDF
7. Clinical Significance of Preoperative Inflammatory Markers in Prediction of Prognosis in Node-Negative Colon Cancer: Correlation between Neutrophil-to-Lymphocyte Ratio and Poorly Differentiated Clusters
- Author
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Giulia Turri, Valeria Barresi, Alessandro Valdegamberi, Gabriele Gecchele, Cristian Conti, Serena Ammendola, Alfredo Guglielmi, Aldo Scarpa, and Corrado Pedrazzani
- Subjects
colon cancer ,poorly differentiated clusters ,prognostic factors ,inflammatory markers ,histopathological markers ,immune system ,Biology (General) ,QH301-705.5 - Abstract
Although stage I and II colon cancers (CC) generally show a very good prognosis, a small proportion of these patients dies from recurrent disease. The identification of high-risk patients, who may benefit from adjuvant chemotherapy, becomes therefore essential. We retrospectively evaluated 107 cases of stage I (n = 28, 26.2%) and II (n = 79, 73.8%) CC for correlations among preoperative inflammatory markers, histopathological factors and long-term prognosis. A neutrophil-to-lymphocyte ratio greater than 3 (H-NLR) and a platelet-to-lymphocyte ratio greater than 150 (H-PLR) were significantly associated with the presence of poorly differentiated clusters (PDC) (p = 0.007 and p = 0.039, respectively). In addition, H-NLR and PDC proved to be significant and independent survival prognosticators for overall survival (OS; p = 0.007 and p < 0.001, respectively), while PDC was the only significant prognostic factor for cancer-specific survival (CSS; p < 0.001,). Finally, the combination of H-NLR and PDC allowed an optimal stratification of OS and CSS in our cohort, suggesting a potential role in clinical practice for the identification of high-risk patients with stage I and II CC.
- Published
- 2021
- Full Text
- View/download PDF
8. Biotransformation, antioxidant and histopathological biomarker responses to contaminants in European and American yellow eels from the Gironde and St. Lawrence estuaries.
- Author
-
Couture, Patrice, Patey, Géraldine, Couillard, Catherine M., Pierron, Fabien, and Baudrimont, Magalie
- Subjects
- *
BIOTRANSFORMATION (Metabolism) , *ANTIOXIDANTS , *HISTOPATHOLOGY , *BIOLOGICAL tags , *AMERICAN eel - Abstract
Since the early 1980s, populations of American ( Anguilla rostrata ) and European eels ( Anguilla anguilla ) have suffered a sharp decline. The causes of their decline are likely multifactorial and include chemical pollution. A field study was conducted in eight sites varying in organic and metal contamination along the St. Lawrence (Eastern Canada) and Gironde (France) systems to investigate the relationships among contaminants, biological characteristics and biotransformation, antioxidant and histopathological biomarkers in eels from both species. For A. rostrata , no major influences of persistent organic contaminants on biomarkers were identified. For A. anguilla, eels from the most contaminated site expressed higher surface of MelanoMacrophage Centers (MMCs) and eels from another contaminated site expressed higher amount of spleen lipofuscin pigment. These two histopathological biomarkers were also associated with aging. Compared to eels from the cleanest French site, higher hepatic catalase activity and density of MMC in eels from contaminated sites was related to higher concentration of organic (DDT and metabolites, sum of PCBs, sum of PBDEs) and inorganic (Hg and Cd) contaminants. In both species, a higher deposition of spleen hemosiderin pigment was measured in eels from the most brackish sites compared to eels living in freshwater environments. Our results suggest an association between higher hemosiderin pigment and metal contamination (As for A. anguilla and Pb for A. rostrata ). Parasitism by A. crassus was observed in European eels from freshwater sites but not in eels from brackish habitats. Overall, contamination may pose a greater risk for the health of European compared to American eels. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
9. Venous Wall of Patients with Chronic Venous Disease Exhibits a Glycolytic Phenotype
- Author
-
Oscar Fraile-Martinez, Cielo García-Montero, Miguel Ángel Alvarez-Mon, Ana M. Gomez-Lahoz, Jorge Monserrat, Maria Llavero-Valero, Fernando Ruiz-Grande, Santiago Coca, Melchor Alvarez-Mon, Julia Buján, Natalio García-Honduvilla, Jose V. Saz, and Miguel A. Ortega
- Subjects
chronic venous disease (CVeD) ,varicose veins (VVs) ,glycolytic phenotype ,histopathological markers ,Medicine (miscellaneous) - Abstract
Chronic venous disease (CVeD) is a rising medical condition characterized by a broad spectrum of disorders in the venous system. Varicose veins (VVs) represent a frequent clinical manifestation of CVeD, particularly in the lower limbs. Prior histopathological studies have defined a set of alterations observed in the venous wall of patients with VVs, affecting their structure and behavior. Metabolic changes in the veins appear to be a critical biological mechanism aiding our understanding of the pathogenesis of CVeD. In this sense, previous studies have identified a potential role of a glycolytic phenotype in the development of different vascular disorders; however, its precise role in CVeD remains to be fully explored. Thus, the aim of the present study was to analyze the gene and protein expression of glucose transporter 1 (GLUT-1) and the glycolytic enzymes PGK-1, ALD, GA3PDH and LDH in the VVs of patients with CVeD (n = 35) in comparison to those expressed in healthy subjects. Our results display enhanced gene and protein expression of GLUT-1, PGK-1, ALD, GA3PDH and LDH in patients with CVeD, suggesting a glycolytic switch of the venous tissue. Greater understanding of the impact of this glycolytic switch in patients with CVeD is required to define a possible pathophysiological role or therapeutic implications of these changes.
- Published
- 2022
10. The impact of histopathological features on the prognosis of oral squamous cell carcinoma:a comprehensive review and meta-analysis
- Author
-
da Silva Dolens, E. (Eder), Dourado, M. R. (Mauricio Rocha), Almangush, A. (Alhadi), Salo, T. A. (Tuula A.), Gurgel Rocha, C. A. (Clarissa Araujo), da Silva, S. D. (Sabrina Daniela), Brennan, P. A. (Peter A.), Coletta, R. D. (Ricardo D.), da Silva Dolens, E. (Eder), Dourado, M. R. (Mauricio Rocha), Almangush, A. (Alhadi), Salo, T. A. (Tuula A.), Gurgel Rocha, C. A. (Clarissa Araujo), da Silva, S. D. (Sabrina Daniela), Brennan, P. A. (Peter A.), and Coletta, R. D. (Ricardo D.)
- Abstract
Objective: Over many decades, studies on histopathological features have not only presented high-level evidence of contribution for treatment directions and prognosis of oral squamous cell carcinoma (OSCC) but also provided inconsistencies, making clinical application difficult. The 8th TNM staging system of OSCC has acknowledged the importance of some histopathological features, by incorporating depth of invasion (DOI) to T category and extranodal extension (ENE) to N category. The aim of this systematic review with meta-analysis is to determine the most clinically relevant histopathological features for risk assessment and treatment planning of OSCC and to elucidate gaps in the literature. Methods: A systematic review was conducted using PRISMA guidelines, and the eligibility criteria were based on population, exposure, comparison, outcome, and study type (PECOS). PubMed, Cochrane, Scopus, and Web of Science were searched for articles exploring the impact of histopathological features on OSCC outcomes with Cox multivariate analysis. Pooled data were subjected to an inverse variance method with random effects or fixed effect model, and the risk of bias was evaluated using quality in prognosis studies (QUIPS). Quality of evidence was assessed with the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria. Results: The study included 172 articles published from 1999 to 2021. Meta-analyses confirmed the prognostic potential of DOI, ENE, perineural invasion, lymphovascular invasion, and involvement of the surgical margins and brought promising results for the association of bone invasion, tumor thickness, and pattern of invasion with increased risk for poor survival. Although with a small number of studies, the results also revealed a clinical significance of tumor budding and tumor-stroma ratio on predicted survival of patients with OSCC. Most of the studies were considered with low or moderate risk of bias, and the certainty in
- Published
- 2021
11. Squamous cell carcinoma of the oral tongue: histopathological parameters associated with outcome.
- Author
-
Kolokythas, A., Park, S., Schlieve, T., Pytynia, K., and Cox, D.
- Subjects
CANCER treatment ,SQUAMOUS cell carcinoma ,CANCER chemotherapy ,CANCER radiotherapy ,HISTOPATHOLOGY ,RISK assessment ,HEALTH outcome assessment - Abstract
The purpose of this study was to investigate the applicability of the histological risk assessment model proposed by Brandwein-Gensler et al. in a cohort of oral tongue squamous cell carcinoma (OTSCC) patients treated with definitive surgery. We also examined the impact of additional histopathological features on disease acceleration. The cases of 49 OTSCC patients attending our institution between 1995 and 2009, who underwent definitive surgical resection followed by adjunct chemoradiotherapy when indicated, were reviewed retrospectively. Surgical resection specimens and complete clinical and demographic data were available for these patients; follow-up was at least 6 months. In this cohort we only identified a correlation between gender and the histopathological risk model score ( P < 0.001). With regard to clinical and demographic data, histopathological parameters, and disease status at last follow-up, we identified significant correlations between disease status and (1) grade of differentiation ( P = 0.0086), and (2) keratin score ( P = 0.026). We found no significant correlations between the histopathological risk assessment model and disease progression or outcomes, with the exception of gender ( P < 0.0001). Grade of differentiation, keratin score, and the lymphocytic host response significantly impacted disease acceleration. For OTSCC, it appears that clinical characteristics of the tumour as well as histopathological markers play an important role in the outcome. Efforts towards identifying predictive markers should be continued, especially by sub-site of the oral cavity. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
12. Clinical Significance of Preoperative Inflammatory Markers in Prediction of Prognosis in Node-Negative Colon Cancer: Correlation between Neutrophil-to-Lymphocyte Ratio and Poorly Differentiated Clusters
- Author
-
Cristian Conti, Aldo Scarpa, Gabriele Gecchele, Alessandro Valdegamberi, Giulia Turri, Corrado Pedrazzani, Serena Ammendola, Alfredo Guglielmi, and Valeria Barresi
- Subjects
medicine.medical_specialty ,Colorectal cancer ,Medicine (miscellaneous) ,Gastroenterology ,General Biochemistry, Genetics and Molecular Biology ,Article ,Correlation ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,histopathological markers ,Internal medicine ,medicine ,Clinical significance ,Neutrophil to lymphocyte ratio ,lcsh:QH301-705.5 ,business.industry ,Poorly differentiated ,colon cancer ,immune system ,inflammatory markers ,poorly differentiated clusters ,prognostic factors ,medicine.disease ,Node negative ,lcsh:Biology (General) ,030220 oncology & carcinogenesis ,Cohort ,030211 gastroenterology & hepatology ,business - Abstract
Although stage I and II colon cancers (CC) generally show a very good prognosis, a small proportion of these patients dies from recurrent disease. The identification of high-risk patients, who may benefit from adjuvant chemotherapy, becomes therefore essential. We retrospectively evaluated 107 cases of stage I (n = 28, 26.2%) and II (n = 79, 73.8%) CC for correlations among preoperative inflammatory markers, histopathological factors and long-term prognosis. A neutrophil-to-lymphocyte ratio greater than 3 (H-NLR) and a platelet-to-lymphocyte ratio greater than 150 (H-PLR) were significantly associated with the presence of poorly differentiated clusters (PDC) (p = 0.007 and p = 0.039, respectively). In addition, H-NLR and PDC proved to be significant and independent survival prognosticators for overall survival (OS, p = 0.007 and p <, 0.001, respectively), while PDC was the only significant prognostic factor for cancer-specific survival (CSS, p <, 0.001,). Finally, the combination of H-NLR and PDC allowed an optimal stratification of OS and CSS in our cohort, suggesting a potential role in clinical practice for the identification of high-risk patients with stage I and II CC.
- Published
- 2021
13. Clinical Significance of Preoperative Inflammatory Markers in Prediction of Prognosis in Node-Negative Colon Cancer: Correlation between Neutrophil-to-Lymphocyte Ratio and Poorly Differentiated Clusters.
- Author
-
Turri, Giulia, Barresi, Valeria, Valdegamberi, Alessandro, Gecchele, Gabriele, Conti, Cristian, Ammendola, Serena, Guglielmi, Alfredo, Scarpa, Aldo, and Pedrazzani, Corrado
- Subjects
NEUTROPHIL lymphocyte ratio ,COLON cancer prognosis ,PROGNOSIS ,COLON cancer ,ADJUVANT chemotherapy - Abstract
Although stage I and II colon cancers (CC) generally show a very good prognosis, a small proportion of these patients dies from recurrent disease. The identification of high-risk patients, who may benefit from adjuvant chemotherapy, becomes therefore essential. We retrospectively evaluated 107 cases of stage I (n = 28, 26.2%) and II (n = 79, 73.8%) CC for correlations among preoperative inflammatory markers, histopathological factors and long-term prognosis. A neutrophil-to-lymphocyte ratio greater than 3 (H-NLR) and a platelet-to-lymphocyte ratio greater than 150 (H-PLR) were significantly associated with the presence of poorly differentiated clusters (PDC) (p = 0.007 and p = 0.039, respectively). In addition, H-NLR and PDC proved to be significant and independent survival prognosticators for overall survival (OS; p = 0.007 and p < 0.001, respectively), while PDC was the only significant prognostic factor for cancer-specific survival (CSS; p < 0.001,). Finally, the combination of H-NLR and PDC allowed an optimal stratification of OS and CSS in our cohort, suggesting a potential role in clinical practice for the identification of high-risk patients with stage I and II CC. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
14. Biotransformation, antioxidant and histopathological biomarker responses to contaminants in European and American yellow eels from the Gironde and St. Lawrence estuaries.
- Author
-
Patey G, Couillard CM, Pierron F, Baudrimont M, and Couture P
- Subjects
- Animals, Biotransformation, Europe, Halogenated Diphenyl Ethers metabolism, Halogenated Diphenyl Ethers pharmacokinetics, Hemosiderin analysis, Metals analysis, Metals metabolism, Metals pharmacokinetics, Polychlorinated Biphenyls metabolism, Polychlorinated Biphenyls pharmacokinetics, United States, Water Pollutants, Chemical pharmacokinetics, Anguilla metabolism, Antioxidants metabolism, Biomarkers analysis, Biomarkers metabolism, Estuaries, Halogenated Diphenyl Ethers analysis, Polychlorinated Biphenyls analysis, Water Pollutants, Chemical analysis
- Abstract
Since the early 1980s, populations of American (Anguilla rostrata) and European eels (Anguilla anguilla) have suffered a sharp decline. The causes of their decline are likely multifactorial and include chemical pollution. A field study was conducted in eight sites varying in organic and metal contamination along the St. Lawrence (Eastern Canada) and Gironde (France) systems to investigate the relationships among contaminants, biological characteristics and biotransformation, antioxidant and histopathological biomarkers in eels from both species. For A. rostrata, no major influences of persistent organic contaminants on biomarkers were identified. For A. anguilla, eels from the most contaminated site expressed higher surface of MelanoMacrophage Centers (MMCs) and eels from another contaminated site expressed higher amount of spleen lipofuscin pigment. These two histopathological biomarkers were also associated with aging. Compared to eels from the cleanest French site, higher hepatic catalase activity and density of MMC in eels from contaminated sites was related to higher concentration of organic (DDT and metabolites, sum of PCBs, sum of PBDEs) and inorganic (Hg and Cd) contaminants. In both species, a higher deposition of spleen hemosiderin pigment was measured in eels from the most brackish sites compared to eels living in freshwater environments. Our results suggest an association between higher hemosiderin pigment and metal contamination (As for A. anguilla and Pb for A. rostrata). Parasitism by A. crassus was observed in European eels from freshwater sites but not in eels from brackish habitats. Overall, contamination may pose a greater risk for the health of European compared to American eels., (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
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