16 December 2010
The effect of L-ascorbic acid and/or tocopherol supplementation on electrophysiological parameters of the colon of rats chronically exposed to lead
Danuta I. Kosik-BogackaBDE, Irena Baranowska-BosiackaABCDE, Mariola MarchlewiczBD, Agnieszka KolasaBD, Katarzyna JakubowskaB, Maria OlszewskaB, Natalia LanochaB, Ireneusz WiernickiEF, Barbara MilloB, Barbara WiszniewskaG, Dariusz ChlubekGDOI: 10.12659/MSM.881323
Med Sci Monit 2011; 17(1): BR16-26
Abstract
Background: The aim of this study was to assess the effect of diet supplementation with L-ascorbic acid (500 mg/L), tocopherol (3 mg/kg b.w.), and/or a water soluble analog of tocopherol (Trolox) (48 mg/L) on ion transport in the colon of rats subjected to a chronic exposure (9 months) to 0.1% lead acetate in drinking water.
Material/Methods: The electrophysiological parameters of the colon wall were measured with Ussing methods. Lead content in the whole blood was analyzed by graphite furnace atomic absorption spectrometry (GFAAS) using Zeeman correction. L-ascorbic acid and tocopherol in plasma was measured by high performance liquid chromatography. Immunohistochemical reaction was carried out for visualization of occludin, the intracellular tight junction protein.
Results: We showed a strong inhibitory effect of lead on the electrophysiological parameters, changes in intestinal permeability, disappearance of junctional occludin, decreased amount of mucus covering the colon surface, and the accumulation of PAS-positive substance in the apical region of the cytoplasm in the absorptive cells.
Conclusions: Supplementation with tocopherol or Trolox did not exert a beneficial influence on the studied parameters. L-ascorbic acid positively influenced the examined electrophysiological parameters, as it cancelled the inhibitory influence of lead on ion transport in the rat colon. L-ascorbic acid also protected against tight junction disruption of epithelial cells in the colon of the lead-treated rats. A similar effect was observed in the group of rats receiving lead and supplemented with L-ascorbic acid plus Trolox.
Keywords: Organometallic Compounds - toxicity, Occludin, Membrane Proteins - metabolism, Ion Transport - drug effects, Electrophysiology, Dietary Supplements, Colon - physiology, Chromatography, High Pressure Liquid, Ascorbic Acid - pharmacology, Tocopherols - pharmacology, Water Pollutants, Chemical - toxicity
Editorial
01 January 2023 : Editorial
Editorial: Current Status of Two Adjuvanted Malaria Vaccines and the World Health Organization (WHO) Strategy to Eradicate Malaria by 2030DOI: 10.12659/MSM.939357
Med Sci Monit 2023; 29:e939357
SARS-CoV-2/COVID-19
26 January 2023 : Editorial
Editorial: The XBB.1.5 (‘Kraken’) Subvariant of Omicron SARS-CoV-2 and its Rapid Global SpreadMed Sci Monit In Press; DOI: 10.12659/MSM.939580
19 January 2023 : Clinical Research
Evaluation of Health-Related Quality of Life and Mental Health in 729 Medical Students in Indonesia During ...Med Sci Monit In Press; DOI: 10.12659/MSM.938892
19 January 2023 : Clinical Research
Determining the Impact of the COVID-19 Pandemic on Dental Care in the Serbian Adult Population: An Online Q...Med Sci Monit 2023; 29:e939238
27 December 2022 : Clinical Research
Effect of Physiotherapy to Correct Rounded Shoulder Posture in 30 Patients During the COVID-19 Pandemic in ...Med Sci Monit 2022; 28:e938926
In Press
31 Jan 2023 : Clinical Research
Balloon Dilation Eustachian Tuboplasty Combined with Tympanotomy Tube Insertion for Treatment of Refractory...Med Sci Monit In Press; DOI: 10.12659/MSM.938879
31 Jan 2023 : Clinical Research
Comparison of Vision Correction and Corneal Thickness at 180-Day Follow-Up After Femtosecond Laser-Assisted...Med Sci Monit In Press; DOI: 10.12659/MSM.939099
30 Jan 2023 : Clinical Research
Splenic Artery Steal Syndrome in Patients with Liver Cirrhosis: A Retrospective Clinical StudyMed Sci Monit In Press; DOI: 10.12659/MSM.938998
27 Jan 2023 : Database Analysis
Association Between Neutrophil-Lymphocyte Ratio and All-Cause Mortality in Critically Ill Patients with Chr...Med Sci Monit In Press; DOI: 10.12659/MSM.938554
Most Viewed Current Articles
13 Nov 2021 : Clinical Research
Acceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...DOI :10.12659/MSM.932788
Med Sci Monit 2021; 27:e932788
30 Dec 2021 : Clinical Research
Retrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...DOI :10.12659/MSM.935379
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review article
A Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...DOI :10.12659/MSM.936292
Med Sci Monit 2022; 28:e936292
01 Jan 2022 : Editorial
Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...DOI :10.12659/MSM.935952
Med Sci Monit 2022; 28:e935952