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Fanari O, Tavakoli S, Akeson S, Makhamreh A, Nian K, McCormick CA, Qiu Y, Bloch D, Jain M, Wanunu M, Rouhanifard SH. Probing enzyme-dependent pseudouridylation using direct RNA sequencing to assess neuronal epitranscriptome plasticity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.26.586895. [PMID: 38585714 PMCID: PMC10996719 DOI: 10.1101/2024.03.26.586895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Chemical modifications in mRNAs such as pseudouridine (psi) can regulate gene expression, although our understanding of the functional impact of individual psi modifications, especially in neuronal cells, is limited. We apply nanopore direct RNA sequencing to investigate psi dynamics under cellular perturbations in SH-SY5Y cells. We assign sites to psi synthases using siRNA-based knockdown. A steady-state enzyme-substrate model reveals a strong correlation between psi synthase and mRNA substrate levels and psi modification frequencies. Next, we performed either differentiation or lead-exposure to SH-SY5Y cells and found that, upon lead exposure, not differentiation, the modification frequency is less dependent on enzyme levels suggesting translational control. Finally, we compared the plasticity of psi sites across cellular states and found that plastic sites can be condition-dependent or condition-independent; several of these sites fall within transcripts encoding proteins involved in neuronal processes. Our psi analysis and validation enable investigations into the dynamics and plasticity of RNA modifications.
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Affiliation(s)
- Oleksandra Fanari
- Dept. of Bioengineering, Northeastern University, Boston, MA
- These authors contributed equally
| | - Sepideh Tavakoli
- Dept. of Bioengineering, Northeastern University, Boston, MA
- These authors contributed equally
| | - Stuart Akeson
- Dept. of Bioengineering, Northeastern University, Boston, MA
| | - Amr Makhamreh
- Dept. of Bioengineering, Northeastern University, Boston, MA
| | - Keqing Nian
- Dept. of Bioengineering, Northeastern University, Boston, MA
| | | | - Yuchen Qiu
- Dept. of Bioengineering, Northeastern University, Boston, MA
| | - Dylan Bloch
- Dept. of Bioengineering, Northeastern University, Boston, MA
| | - Miten Jain
- Dept. of Bioengineering, Northeastern University, Boston, MA
- Dept. of Physics, Northeastern University, Boston, MA
| | - Meni Wanunu
- Dept. of Bioengineering, Northeastern University, Boston, MA
- Dept. of Physics, Northeastern University, Boston, MA
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Sawe S, Amasi A, Wynants M. Assessment of Potentially Toxic Metals in Fish from Lake Manyara, Northern Tanzania. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 111:39. [PMID: 37704929 PMCID: PMC10499695 DOI: 10.1007/s00128-023-03794-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/18/2023] [Indexed: 09/15/2023]
Abstract
Elemental tracer concentrations of copper, lead, nickel and zinc, were assessed in the muscles of Oreochromis amphimelas and Clarias gariepinus from Lake Manyara, Tanzania, to evaluate their safety to consumers, specifically humans. Results revealed that no elemental concentrations exceeded the FAO permissible levels, indicating fish from all sites are safe for human consumption. However, based on the highest found concentration of Pb, we recommend a maximum consumption of 2.2 kg of fish from Lake Manyara per week. No significant differences were observed in the metal concentrations between the two fish species, suggesting there is no bioaccumulation in the food chain. Moreover, no significant differences were found between fish landing sites, indicating there are no regions in the lake with higher pollution. These findings indicate that PTM concentrations have not increased to toxic levels due to increased mobilisation from the catchment. Continued monitoring of potential toxic metal concentrations in fish is recommended due to endorheic nature of Lake Manyara and increasing anthropogenic activities in its catchment area.
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Affiliation(s)
- Shovi Sawe
- Department of Research and Development, Tanzania Atomic Energy Commission, P O Box 743, Arusha, Tanzania
| | - Aloyce Amasi
- School of Materials, Energy, Water and Environmental Science, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, 23311 Arusha, Tanzania
| | - Maarten Wynants
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
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Asiwe JN, Ekene EN, Agbugba LC, Moke EG, Akintade AV, Ben-Azu B, Eruotor H, Daubry TME, Anachuna KK, Oyovwi MO. Ginkgo biloba supplement abates lead-induced endothelial and testicular dysfunction in Wistar rats via up-regulation of Bcl-2 protein expression, pituitary-testicular hormones and down-regulation of oxido-inflammatory reactions. J Trace Elem Med Biol 2023; 79:127216. [PMID: 37224746 DOI: 10.1016/j.jtemb.2023.127216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 12/01/2022] [Accepted: 05/17/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND Apoptotic and oxido-inflammatory pathways have been found to be up-regulated in lead acetate poisoning which has been associated to endothelial and testicular dysfunctions. It is yet uncertain, nevertheless, if treatment with Ginkgo biloba supplements (GBS), a flavonoid-rich natural product can lessen the adverse effects of lead on endothelial and testicular functions. This study investigated the impact of Ginkgo biloba supplementation on lead-induced endothelial and testicular dysfunctions. METHODS The animals were treated with GBS (50 mg/kg and 100 mg/kg orally) for 14 days following oral exposure to lead acetate (25 mg/kg) for 14 days. After euthanasia, blood samples, epididymal sperm, testes, and aorta were collected. The quantities of the hormones (testosterone, follicle stimulating hormone (FSH) and luteinizing hormone (LH), as well as the anti-apoptotic, oxidative, nitrergic, inflammatory markers, were then determined using immunohistochemistry, ELISA, and conventional biochemical methods. RESULTS GBS reduced lead-induced oxidative stress by increasing the levels of the antioxidant enzymes catalase (CAT), glutathione (GSH), and superoxide dismutase (SOD), while lowering malondialdehyde (MDA) in endothelium and testicular cells. Normal testicular weight was restored by GBS which also decreased endothelial endothelin-I and increased nitrite levels. TNF-α and IL-6 were decreased while Bcl-2 protein expression was enhanced. Lead-induced alterations in reproductive hormones (FSH, LH, and testosterone) were also restored to normal. CONCLUSION According to our result, using Ginkgo biloba supplement prevented lead from causing endothelial and testicular dysfunction by raising pituitary-testicular hormone levels, boosting Bcl-2 protein expression and lowering oxidative and inflammatory stress in the endothelium and testes.
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Affiliation(s)
- Jerome Ndudi Asiwe
- Department of Physiology, Faculty of Basic Medical Sciences, PAMO University of Medical Sciences, Port-Harcourt, Nigeria; Department of Physiology, Faculty of Basic Medical Sciences, University of Ibadan, Ibadan, Nigeria; Department of Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Nigeria.
| | - Enekabokom Nwoke Ekene
- Department of Pharmacology, Faculty of Basic Clinical Sciences, Rivers State University, Port-Harcourt, Nigeria
| | - Linda Chinyere Agbugba
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Emuesiri Goodies Moke
- Department of Pharmacology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Nigeria
| | | | - Benneth Ben-Azu
- Department of Pharmacology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Nigeria
| | - Harrison Eruotor
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Port-Harcourt, Port-Harcourt, Nigeria
| | | | - Kenneth Kelechi Anachuna
- Department of Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Nigeria
| | - Mega O Oyovwi
- Department of Physiology, Faculty of Basic Medical Sciences, Achievers University, Owo, Ondo, Nigeria
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Lakka N, Pai B, Mani MS, Dsouza HS. Potential diagnostic biomarkers for lead-induced hepatotoxicity and the role of synthetic chelators and bioactive compounds. Toxicol Res (Camb) 2023; 12:178-188. [PMID: 37125327 PMCID: PMC10141777 DOI: 10.1093/toxres/tfad014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 01/27/2023] [Accepted: 02/19/2023] [Indexed: 03/14/2023] Open
Abstract
Lead (Pb2+) poisoning is a public health concern of global dimensions. Although several public health guidelines and workplace safety policies are existing and enforced, lead toxicity cases are drastically increasing. Lead exposure leads to numerous harmful consequences and causes adverse effects on different body organs and systems, mainly via the generation of reactive oxygen species, leading to augmented oxidative stress, competing with metal ions, and binding with the sulfhydryl groups. In several instances, lead poisoning cases remain undiagnosed and untreated or receive only symptomatic treatment. Estimation of blood lead levels reflects only a recent exposure, however, which does not reveal the total body burden. This review summarizes the effects of lead with special reference to hepatotoxicity and some of the potential diagnostic biomarkers. Furthermore, it also focuses on synthetic chelators used in the treatment of lead poisoning and the advantage of using bioactive compounds with an emphasis on the ameliorative effect of garlic.
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Affiliation(s)
- Netranandini Lakka
- Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Bhagyashree Pai
- Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Monica Shirley Mani
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Herman Sunil Dsouza
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
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Zhu Q, Zhao Q, Ping P, Zhang Q, Gong L, Feng L, Zhao Y, Fu S. Relationships Between Hair Chemical Elements and Nutritional Status in Oldest-Old and Centenarian Populations. J Multidiscip Healthc 2023; 16:1171-1178. [PMID: 37143478 PMCID: PMC10153404 DOI: 10.2147/jmdh.s401523] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 04/24/2023] [Indexed: 05/06/2023] Open
Abstract
Background Hair chemical elements reflect physical condition over time. Collection, transporting, and storing hair is more convenient than handling blood. Hair elements show higher levels for a long time, which allows for more accurate and sensitive results than using blood. Studies explored the relationships between elements and age, without full consideration of nutritional status, in older people. This study explored the relationships between hair chemical elements and Geriatric Nutritional Risk Index (GNRI) in oldest-old and centenarian populations to provide an updated reference for nutritional evaluation of older people. Methods A total of 152 participants over 80 years old underwent home interviews and physical examinations. An inductively coupled plasma mass spectrometer was used to detect hair chemical elements. Results Women accounted for 77.0% of participants. Women had lower levels of zinc, and higher levels of selenium, manganese, lead, iron, and copper than men (P<0.05 for all). Ninety-two participants formed the 80-99 year group, and 60 participants formed the 100+ year group. Centenarians had lower levels of selenium, lead, iron, and copper than those aged 80-99 years (P<0.05 for all). Hair selenium levels were positively associated with GNRI (odds ratio: 11.55, 95% confidence interval: 3.42-19.68, P < 0.05) based on a multivariate linear regression analysis. Other chemical elements had no significant associations with GNRI based on a multivariate linear regression analysis. Conclusion Chemical elements and nutrient status were altered based on age and gender, and an association existed between hair selenium and nutritional status in older people. Chemical elements may influence and indicate nutritional status in older people.
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Affiliation(s)
- Qiao Zhu
- Central Laboratory, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
| | - Qingkai Zhao
- Department of Health Medicine, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
| | - Ping Ping
- General Station for Drug Instrument Supervision and Control, Joint Logistic Support Force of Chinese People’s Liberation Army, Beijing, People’s Republic of China
| | - Qian Zhang
- Department of Neurology, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
| | - Li Gong
- Department of Pathology, Tangdu Hospital, The Fourth Military Medical University, Xi’an, People’s Republic of China
| | - Long Feng
- Department of Anesthesiology, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
| | - Yali Zhao
- Central Laboratory, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
- Yali Zhao, Central Laboratory, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, Hainan, 572013, People’s Republic of China, Email
| | - Shihui Fu
- Department of Cardiology, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, People’s Republic of China
- Department of Geriatric Cardiology, Chinese People’s Liberation Army General Hospital, Beijing, People’s Republic of China
- Correspondence: Shihui Fu, Department of Cardiology, Hainan Hospital of Chinese People’s Liberation Army General Hospital, Sanya, Hainan, 572013, People’s Republic of China, Email
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Asiwe JN, Kolawole TA, Ben-Azu B, Ajayi AM, Ojetola AA, Moke EG, Nwangwa EK. Up-regulation of B-cell lymphoma factor-2 expression, inhibition of oxidative stress and down-regulation of pro-inflammatory cytokines are involved in the protective effect of cabbage (Brassica oleracea) juice in lead-induced endothelial dysfunction in rats. J Trace Elem Med Biol 2022; 73:127014. [PMID: 35653936 DOI: 10.1016/j.jtemb.2022.127014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/07/2022] [Accepted: 05/27/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Oxido-inflammatory stress and dysregulation of nitric oxide (NO) system has been implicated in lead toxicity. Cabbage is an antioxidant-rich household vegetable with plethora of therapeutic potentials. The present study investigated the anti-oxido-inflammatory activity of cabbage in lead-induced endothelial dysfunction. METHODS Twenty (20) male Wistar rats were selected into four groups (n = 5) and treated with distilled water (1 mL/100 g b.wt), lead acetate (25 mg/kg b.wt), cabbage juice (1 mL/100 g b.wt) and lead acetate (25 mg/kg b.wt) plus cabbage juice (1 mL/100 g b.wt) respectively. Treatment was done orally for 28 days, thereafter, oxidative stress (SOD, CAT, GSH, and MDA), inflammatory (TNF-α and IL-6) and apoptotic (Bcl-2) markers were assayed using standard biochemical assays as well as histoarchitectural study of the endothelium. RESULTS The results showed that they were significant increase in MDA, ET-1, TNF-α and IL-6 while SOD, GSH, CAT, NO and Bcl-2 protein expression were decreased in Lead exposed animals. Endothelial histoarchitecture was also altered. Following Cabbage juice treatment, MDA, ET-I, TNF-α and IL-6 were down-regulated while SOD, GSH, CAT, NO and Bcl-2 protein expression were up-regulated. Histoarchitecture was significantly recovered. CONCLUSION The study suggests that cabbage juice could mitigates Lead-induced endothelial dysfunction by modulating oxido-inflammatory and anti-apoptotic mediators. DATA AVAILABILITY All data are available upon request.
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Affiliation(s)
- Jerome Ndudi Asiwe
- Department of Physiology, Faculty of Basic Medical Science, PAMO University of Medical Sciences, Port-Harcourt, Nigeria; Department of Physiology, Faculty of Basic Medical Sciences, University of Ibadan, Ibadan, Nigeria.
| | - Tolunigba Abisola Kolawole
- Department of Physiology, Faculty of Basic Medical Science, PAMO University of Medical Sciences, Port-Harcourt, Nigeria
| | - Benneth Ben-Azu
- Department of Pharmacology, Faculty of Basic Medical Sciences, College of Health Sciences, Delta State University, Abraka, Nigeria
| | - Abayomi Mayowa Ajayi
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, University of Ibadan, Ibadan, Nigeria
| | | | - Emuesiri Goodies Moke
- Department of Pharmacology, Faculty of Basic Medical Sciences, College of Health Sciences, Delta State University, Abraka, Nigeria
| | - Eze Kingsley Nwangwa
- Department of Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Nigeria
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Effects of Bacterial Cellulose Nanofiber on Lead Concentration in Kidney and Liver Tissues of Wistar Rats. MEDICAL LABORATORY JOURNAL 2022. [DOI: 10.52547/mlj.16.4.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
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Kolawole TA, Asiwe JN, Buduburisi BR, Akintade VA, Adebayo OG, Ojetola AA, Dapper DV. Cabbage (Brassica oleracea) mitigates lead (II) acetate-induced testicular dysfunction in Wistar rats via up-regulation of Bcl-2 protein expression, pituitary-testicular hormonal axis and down-regulation of oxido-inflammatory reactions. Andrologia 2022; 54:e14476. [PMID: 35598098 DOI: 10.1111/and.14476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/05/2022] [Accepted: 04/14/2022] [Indexed: 12/16/2022] Open
Abstract
Oxido-inflammatory stress has been involved in lead-induced testicular dysfunction and plants rich in anti-oxidants has been reported to be beneficial in combating heavy metal poisonings in animal studies. However, cabbage juice protective effect on lead-induced testicular dysfunction was investigated in this study. Twenty male Wistar rats were selected into four (n = 5) groups and given distilled water (1 ml/100 g body weight), lead acetate (25 mg/kg body weight), cabbage juice (1 ml/100 g body weight), and lead acetate with cabbage juice, respectively. All treatments were administered orally for 28 days. Sperm count, motility, viability, testosterone, luteinising hormone and follicle-stimulating hormone, testicular Bcl-2 expression, and enzymatic anti-oxidant capabilities were considerably (p < 0.05) decrease in lead-treated animals. However, cabbage juice significantly (p < 0.05) elevated these parameters. Testicular malondialdehyde, tumour necrosis factor-α, nitric oxide and interleukin-6 was elevated by lead acetate. When comparing cabbage juice-treated animals to lead-treated animals, all of these parameters were considerably (p < 0.05) downregulated in cabbage juice-treated animals. Following lead administration, the testes' histomorphological alterations were not totally recovered despite therapy with cabbage juice. Conclusively, this study suggest that cabbage juice mitigates testicular dysfunction associated with lead exposure via its anti-oxidant, anti-inflammatory, anti-apoptotic and androgenic properties.
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Affiliation(s)
| | - Jerome Ndudi Asiwe
- Department of Physiology, PAMO University of Medical Sciences, Port-Harcourt, Nigeria.,Department of Physiology, University of Ibadan, Ibadan, Nigeria
| | | | | | - Olusegun Gafar Adebayo
- Department of Physiology, PAMO University of Medical Sciences, Port-Harcourt, Nigeria.,Department of Physiology, University of Ibadan, Ibadan, Nigeria
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Asiwe JN, Kolawole TA, Anachuna KK, Ebuwa EI, Nwogueze BC, Eruotor H, Igbokwe V. Cabbage juice protect against lead-induced liver and kidney damage in male Wistar rat. Biomarkers 2022; 27:151-158. [PMID: 34974788 DOI: 10.1080/1354750x.2021.2022210] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
AIM Liver and kidney has been implicated in Lead toxicity and this has been linked to oxidative damage. On the other hand, cabbage is one of the widely consumed vegetables with a plethora of health benefits. This present study investigated the protective effect of cabbage juice on lead-induced toxicity in male Wistar rats. METHODS Twenty male Wistar rats were randomly divided into four groups (n = 5) and were treated with distilled water (1 ml/100 g b.wt), Lead acetate (25 mg/kg b.wt), cabbage juice (1 ml/100 g b.wt) and Lead acetate plus cabbage juice respectively. All treatments were administered orally for 28 days. Following euthanasia, blood was collected and serum decanted for biochemical assay and liver and kidney tissues were harvested, prepared for antioxidant activity and histological study. RESULT Cabbage juice significantly attenuated Lead-induced liver and kidney dysfunction by lowering serum concentrations of urea, creatinine, ALP, AST and ALT. Antioxidants (SOD, CAT, GSH) were also upregulated in liver and kidney tissues. Cabbage juice restored the histoarchitectural changes caused by lead intoxication. CONCLUSION Cabbage juice consumption protected the liver and kidney against lead-induced toxicity by enhancing in vivo anti-oxidant defense system.
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Affiliation(s)
- Jerome Ndudi Asiwe
- Department of Physiology, PAMO University of Medical Sciences, Port-Harcourt, Nigeria.,Department of Physiology, University of Ibadan, Ibadan, Nigeria
| | | | | | | | | | - Harrison Eruotor
- Department of Biochemistry, University of Port-Harcourt, Port-Harcourt, Nigeria
| | - Vincent Igbokwe
- Department of Physiology, PAMO University of Medical Sciences, Port-Harcourt, Nigeria.,Department of Physiology, Nnamdi Azikiwe University, Awka, Nigeria
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Neuwirth L, Okeke E, El Idrissi A. Developmental Pb 2+-Exposure induces cardiovascular pathologies in adult male rats. HEART AND MIND 2022. [DOI: 10.4103/hm.hm_73_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Al-Saleh I. Health Risk Assessment of Trace Metals Through Breast Milk Consumption in Saudi Arabia. Biol Trace Elem Res 2021; 199:4535-4545. [PMID: 33544311 DOI: 10.1007/s12011-021-02607-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/20/2021] [Indexed: 12/31/2022]
Abstract
We previously measured the levels of inorganic mercury, methylmercury, lead, cadmium, and manganese in the breast milk of 203 healthy Saudi mothers who participated in a cross-sectional study between 2011 and 2013. The current study aimed to (1) calculate reference values (RVs) for these metals in breast milk based on the 95th percentile of the metal and the corresponding 95% confidence interval following the approach of the German Human Biomonitoring Commission, and (2) assess the health risk associated with these metals (except lead) by determining the hazard quotient (HQ) and hazard index (HI) for breastfed infants. The risk characterization for the lead was applied using the margin of exposure (MOE) approach. Moreover, the cancer risk (CR) associated with lead was calculated. The RV95s (percentage of samples for which the value was higher than the set value) for inorganic mercury, methylmercury, total mercury, cadmium, lead, and manganese in breast milk (μg/L) were 1.5 (7.9%), 1.5 (5.4%), 2.8 (8.9%), 2.5 (8.4%), 53 (11.3%), and 22.3 (11.8%) μg/L, respectively. The methylmercury, lead, and manganese levels in the present study were higher than those reported previously. The HQ for methylmercury greater than 1 was found in 68.5% of the samples, indicating there may be a potential non-carcinogenic health risk of infant exposure to the toxic metal via breast milk consumption. Despite the high cadmium and manganese levels in breast milk, our results suggested no health risk (HQ < 1). The HI representing the combined non-carcinogenic health risk of four metals was > 1, with methylmercury (74%) being the major contributor. The estimated MOE mean value of 0.134, less than 1, indicates that our breastfed infants may be at increased risk of neurodevelopmental impairments. The CR for lead in two infants was higher than the acceptable level of 1 × 10-4. Although our results may suggest potential carcinogenic and non-carcinogenic risks of infant exposure to toxic metals through breast milk consumption, the benefits of breastfeeding are well recognized and outweigh the potential risks.
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Affiliation(s)
- Iman Al-Saleh
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh, 11211, Saudi Arabia.
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12
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Abbaszadeh S, Yadegari P, Imani A, Taghdir M. Vitamin D3 protects against lead-induced testicular toxicity by modulating Nrf2 and NF-κB genes expression in rat. Reprod Toxicol 2021; 103:36-45. [PMID: 34051273 DOI: 10.1016/j.reprotox.2021.05.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/01/2021] [Accepted: 05/21/2021] [Indexed: 12/13/2022]
Abstract
Lead (Pb) is an environmental toxin that has the ability to alter biological processes by inducing oxidative stress (OS) and inflammation. Nuclear factor erythroid 2-related factor 2 (Nrf2) and nuclear factor-kappa B (NF-κB) are two transcriptional factors that participate in the regulation of cellular responses against OS and inflammation. This study was conducted to evaluate the effects of vitamin D3 (VD) on the prevention of testicular damages of Pb and its association with Nrf2 and NF-κB gene expression levels and their downstream molecules. Forty male Wistar rats were divided into four groups and treatments were performed as following for four weeks: control group received no treatment, VD group were injected intramuscularly with 1000 IU of VD/Kg every other day, Pb group received 1000 mg of Pb/L of drinking water, and Pb + VD group were exposed to Pb and VD simultaneously. The results demonstrated significant decrease in the levels of tissue antioxidants, and increase in inflammatory cytokines in the Pb-intoxicated group, with increased Nrf2 and NF-κB mRNA levels. A remarkable reduction in sperm criteria and a significant disruption in serum hormones were also observed. Anyhow, VD supplementation during exposure to Pb showed a significant protective effect against all pathophysiologic alterations caused by Pb. Furthermore, VD affected the expression of Nrf2 and NF-κB and mitigated the harsh effects of Pb. In conclusion, our findings indicate that VD attenuated the toxic impacts of Pb on testis through modulation of Nrf2 and NF-κB gene expression levels which further regulated the OS and inflammatory responses.
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Affiliation(s)
- Sepideh Abbaszadeh
- Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Pouya Yadegari
- Student Research Committee, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Imani
- Department of Medicinal Chemistry, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Taghdir
- Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran; Department of Nutrition and Food Hygiene, Faculty of Health, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Ji X, Wang B, Paudel YN, Li Z, Zhang S, Mou L, Liu K, Jin M. Protective Effect of Chlorogenic Acid and Its Analogues on Lead-Induced Developmental Neurotoxicity Through Modulating Oxidative Stress and Autophagy. Front Mol Biosci 2021; 8:655549. [PMID: 34179077 PMCID: PMC8226318 DOI: 10.3389/fmolb.2021.655549] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 05/04/2021] [Indexed: 11/24/2022] Open
Abstract
Lead (Pb) is among the deleterious heavy metal and has caused global health concerns due to its tendency to cause a detrimental effect on the development of the central nervous system (CNS). Despite being a serious health concern, treatment of Pb poisoning is not yet available, reflecting the pressing need for compounds that can relieve Pb-induced toxicity, especially neurotoxicity. In the quest of exploring protective strategies against Pb-induced developmental neurotoxicity, compounds from natural resources have gained increased attention. Chlorogenic acid (CGA) and its analogues neochlorogenic acid (NCGA) and cryptochlorogenic acid (CCGA) are the important phenolic compounds widely distributed in plants. Herein, utilizing zebrafish as a model organism, we modeled Pb-induced developmental neurotoxicity and investigated the protective effect of CGA, NCGA, and CCGA co-treatment. In zebrafish, Pb exposure (1,000 μg/L) for 5 days causes developmental malformation, loss of dopaminergic (DA) neurons, and brain vasculature, as well as disrupted neuron differentiation in the CNS. Additionally, Pb-treated zebrafish exhibited abnormal locomotion. Notably, co-treatment with CGA (100 µM), NCGA (100 µM), and CCGA (50 µM) alleviated these developmental malformation and neurotoxicity induced by Pb. Further underlying mechanism investigation revealed that these dietary phenolic acid compounds may ameliorate Pb-induced oxidative stress and autophagy in zebrafish, therefore protecting against Pb-induced developmental neurotoxicity. In general, our study indicates that CGA, NCGA, and CCGA could be promising agents for treating neurotoxicity induced by Pb, and CCGA shows the strongest detoxifying activity.
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Affiliation(s)
- Xiuna Ji
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
| | - Baokun Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
| | - Yam Nath Paudel
- Neuropharmacology Research Strength, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Zhihui Li
- School of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Shanshan Zhang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
| | - Lei Mou
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
| | - Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
| | - Meng Jin
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Jinan, China
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14
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Zhu W, Yang J, Hu D, Wang Z. Removing Pb 2+ with a pectin-rich fiber from sisal waste. Food Funct 2021; 12:2418-2427. [PMID: 33502420 DOI: 10.1039/d0fo02829k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pectin-rich dietary fiber from sisal waste (P-SF), containing 11.8% pectin, was produced by a sequential enzymatic-ultrasonic process. P-SF was effective in adsorbing Pb2+ from aqueous solution with a maximum adsorption amount of 184 mg g-1. Adsorption isotherms were fitted well by the Langmuir equation, and the adsorption kinetics could be described by a pseudo-second-order model. X-ray photoelectron spectroscopy and energy dispersive spectroscopy suggested that Pb2+ was adsorbed by P-SF via ion exchange, complexation and mineral precipitation. Dietary supplementation with 10% (w/w) P-SF in basal feed led to a significant decrease in Pb2+ in the brain, liver and kidney. P-SF has greater in vivo efficacy of Pb2+ removal as compared to commercial soybean dietary fiber. The reduction of brain Pb2+ level by P-SF was as effective as by a Pb2+ excretion drug. These findings suggested that P-SF has a great potential to be used as a dietary supplement to cope with Pb2+ poisoning.
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Affiliation(s)
- Wei Zhu
- School of Food Science & Engineering, South China University of Technology, Guangzhou, Guangdong Province 510640, P. R. of China.
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15
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Evaluation of Blood Lead Levels and Their Effects on Hematological Parameters and Renal Function in Iranian Lead Mine Workers. HEALTH SCOPE 2020. [DOI: 10.5812/jhealthscope.95917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Lead toxicity has become a growing health concern in countries such as Iran. However, little information is available on the assessment and evaluation of the health effects of lead exposure in mine workers. Objectives: The present study assessed the occupational exposure to lead and examine the association of blood lead (PbB) levels with hematological and kidney function parameters in mine workers. Methods: In this matched case-control study, the level of PbB was measured in 100 workers (70 exposed and 30 non-exposed), and then its relationship was evaluated with complete blood count (CBC) parameters, zinc protoporphyrin (ZPP), urea, blood creatinine levels, urinary δ-aminolevulinic acid (ALA), coproporphyrin, and creatinine levels. Results: The results showed a linear and significant relationship between the PbB level and B-ZPP, U-ALA, U-coproporphyrin, and U-creatinine levels in states of PbB levels > 20 μg/dL in a time and dose-dependent manner. A significant relationship was observed between the PbB level and the years of occupational exposure to lead and the B-urea level (P-value < 0.03). Conclusions: Chronic occupational exposure to lead decreased hematocrit, RDW-CV, MCV, MCH, and HGB values but did not significantly change RBC counts. Therefore, a regular assessment of routine blood parameters (such as CBC and ZPP) and renal function indices can be effectively used to monitor the toxic effects of lead exposure.
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Udefa AL, Amama EA, Archibong EA, Nwangwa JN, Adama S, Inyang VU, Inyaka GUU, Aju GJ, Okpa S, Inah IO. Antioxidant, anti-inflammatory and anti-apoptotic effects of hydro-ethanolic extract of Cyperus esculentus L. (tigernut) on lead acetate-induced testicular dysfunction in Wistar rats. Biomed Pharmacother 2020; 129:110491. [PMID: 32768970 DOI: 10.1016/j.biopha.2020.110491] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 01/23/2023] Open
Abstract
AIM Lead acetate impairs testicular function by enhancing testicular oxidative stress and apoptosis. Cyperus esculentus possesses antioxidants and has shown great improvement of testicular function. This study investigated the protective effect of hydro-ethanolic extract of Cyperus esculentus on lead acetate-induced testicular dysfunction in Wistar rats. MATERIALS AND METHODS Twenty-five male Wistar rats (180-195 g) were randomly divided into 5 groups (n = 5) namely: Normal control (NC), Lead control (PbC) (20 mg/kg b.w. i.p.), C. esculentus-treated (CE) (500 mg/kg b.w p.o.), Pb + CE(500) (20 mg/kg of lead and 500 mg/kg of extract) and Pb + CE(1000) (20 mg/kg of lead and 1000 mg/kg of extract). Administration lasted for 21 days. RESULTS Sperm count, motility, viability, serum testosterone and follicle stimulating hormone, Johnsen's score, Leydig cell count, Sertoli cell count, testicular testosterone, B-cell lymphoma protein-2 (Bcl-2), steroidogenic acute regulatory protein, cytochrome P450 A1, 3β-hydroxysteroid dehydrogenase (HSD), 17β-HSD, enzymatic antioxidant activities and total antioxidant capacity were significantly (p < 0.05) decreased in PbC compared with NC. These parameters however increased significantly (p < 0.05) in Pb + CE(500) and Pb + CE(1000) compared with PbC. Lead acetate upregulated (p < 0.05) testicular malondialdehyde, nitric oxide, glucose, lactate, lactate dehydrogenase, C-reactive protein, tumor necrosis factor-α, interleukin (IL)-6, IL-1β, Bcl-2 associated X (Bax), Bax/Bcl-2 and cleaved caspase-3 levels. All these parameters were downregulated (p < 0.05) in Pb + CE(500) and Pb + CE(1000) in comparison with PbC. CONCLUSION C. esculentus exhibited a dose-dependent mitigation of lead acetate-induced testicular dysfunction in Wistar rats via its antioxidant, anti-inflammatory and anti-apoptotic effects.
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Affiliation(s)
- Augustine Lishilinimye Udefa
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria.
| | - Ernest Atelhe Amama
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Efiok Aniekan Archibong
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Justina Nwandimma Nwangwa
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Sebastian Adama
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Vincent Ukam Inyang
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Gladys Unye-Uti Inyaka
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Glory Jean Aju
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Sunday Okpa
- Department of Physiology, Faculty of Basic Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
| | - Inah Onete Inah
- Department of Medical Laboratory Science, Faculty of Allied Medical Sciences, College of Medical Sciences, University of Calabar, Calabar, Nigeria
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Yang L, Li X, Jiang A, Li X, Chang W, Chen J, Ye F. Metformin alleviates lead-induced mitochondrial fragmentation via AMPK/Nrf2 activation in SH-SY5Y cells. Redox Biol 2020; 36:101626. [PMID: 32863218 PMCID: PMC7334619 DOI: 10.1016/j.redox.2020.101626] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/03/2020] [Accepted: 06/26/2020] [Indexed: 01/23/2023] Open
Abstract
As a widely acknowledged environmental pollutant, lead (Pb) exhibits neurological toxicity primarily due to the vulnerability of neural system. It is suggested that Pb could perturb mitochondrial function, triggering the following disturbance of cellular homeostasis. Here, we focused on the role of mitochondrial dynamics in Pb-induced cell damage. Pb exposure enhanced mitochondrial fragmentation and elevated p-Drp1 (s616) level in a reactive oxygen species (ROS) dependent manner, leading to cell death and energy shortage. By applying metformin, an AMP-activated protein kinase (AMPK) activator, these impairments could be alleviated via activation of AMPK, validated by experiments of pharmacological inhibition of AMPK. Further investigation confirmed that nuclear factor erythroid 2-related factor 2 (Nrf2), a transcription factor managing antioxidative function, and its downstream antioxidant detoxifying enzyme were activated by metformin, resulting in the inhibition of the Pb-caused oxidative stress. Moreover, Nrf2 mediated the protection of metformin against mitochondrial fragmentation induced by Pb exposure, while knockdown of Nrf2 abrogated the protective effect. Finally, the treatment of Mdivi-1, a mitochondrial fission inhibitor, reversed Pb-triggered cell death, revealing that excessive mitochondrial fission is detrimental. To conclude, metformin could ameliorate Pb-induced mitochondrial fragmentation via antioxidative effects originated from AMPK/Nrf2 pathway activation, promoting energy supply and cell survival. Pb caused mitochondrial fragmentation in a ROS dependent manner. Metformin alleviated Pb-induced mitochondrial fission via Nrf2 activation. AMPK mediated metformin-induced Nrf2 activation. Inhibition of mitochondrial fragmentation rescued Pb-induced cell death.
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Affiliation(s)
- Luoyao Yang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Xiaoyi Li
- Center for Translational Medicine, Wuhan Union Hospital, Huazhong University of Science and Technology, Wuhan, PR China
| | - Anli Jiang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Xintong Li
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Wei Chang
- Department of Public Health, Medical College, Wuhan University of Science and Technology, Wuhan, PR China
| | - Jun Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
| | - Fang Ye
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China; Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
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18
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Cassleman KL, Dorrance KA, Todd AC. Neuropsychiatric Implications of Chronic Lead Exposure. Mil Med 2020; 185:e914-e918. [PMID: 31670374 DOI: 10.1093/milmed/usz362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 09/08/2019] [Accepted: 09/10/2019] [Indexed: 11/14/2022] Open
Abstract
There is growing awareness of chronic exposures to lead, with recent evidence indicating that there is an increased risk of a range of health effects that include cardiovascular, kidney, cognitive, and premature mortality, at blood levels lower than what was previously considered elevated. This report describes the case of a 42-year-old active duty officer with a history of anxiety, cognitive impairment, and paroxysmal hypertensive episodes associated with elevated body burdens of lead as measured in bone, while having low or unremarkable blood level measurements. Challenges related to work-up, treatments, and outcomes are discussed. An elevated body burden of lead may contribute to increased irritability, fatigue, and anxiety, mimicking posttraumatic stress disorder and other primary psychiatric conditions. This presentation highlights the need for an increased index of suspicion of lead poisoning in both medical and psychiatric care, particularly in military populations.
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Affiliation(s)
| | | | - Andrew C Todd
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, Mail Stop 1057, New York, NY 10029
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19
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Mani MS, Nayak DG, Dsouza HS. Challenges in diagnosing lead poisoning: A review of occupationally and nonoccupationally exposed cases reported in India. Toxicol Ind Health 2020; 36:346-355. [PMID: 32496147 DOI: 10.1177/0748233720928170] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lead is a nonessential metal which enters the body through various means and is considered as one of the most common health toxins. Several cases of lead poisoning are reported as a result of inhalation or ingestion of lead in employees working as painters, smelters, electric accumulator manufacturers, compositors, auto mechanics, and miners. In addition to occupational lead exposure, several cases of lead poisoning are reported in the general population through various sources and pathways. Innumerable signs and symptoms of lead poisoning observed are subtle and depend on the extent and duration of exposure. The objective of this review article is to discuss occupationally and nonoccupationally exposed lead poisoning cases reported in India and the associated symptoms, mode of therapy, and environmental intervention used in managing these cases. Lead poisoning cases cannot be identified at an early stage as the symptoms are very general and mimic that of other disorders, and patients might receive only symptomatic treatment. Knowledge about the various symptoms and potential sources is of utmost importance. Medical practitioners when confronted with patients experiencing signs and symptoms as discussed in this article can speculate the possibility of lead poisoning, which could lead to early diagnosis and its management.
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Affiliation(s)
- Monica Shirley Mani
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Divyani Gurudas Nayak
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Herman Sunil Dsouza
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India
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20
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Almasmoum H, Refaat B, Ghaith MM, Almaimani RA, Idris S, Ahmad J, Abdelghany AH, BaSalamah MA, El-Boshy M. Protective effect of Vitamin D3 against lead induced hepatotoxicity, oxidative stress, immunosuppressive and calcium homeostasis disorders in rat. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 72:103246. [PMID: 31465891 DOI: 10.1016/j.etap.2019.103246] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 08/20/2019] [Accepted: 08/22/2019] [Indexed: 06/10/2023]
Abstract
Lead (Pb) is an extremely poisonous, non-essential trace element and toxicity develops in humans following frequent exposure to the heavy metal in polluted environmental and occupational settings. Pb induces hepatic damage through the depletion of the antioxidant system, enhancing cellular oxidative stress and stimulation of proinflammatory cytokines. Although the antioxidant and anti-inflammatory actions of vitamin D3 (VD3) are well-established, a minority of studies measured the protective actions of VD3 against Pb toxicity. Therefore, this work studied the effects of vitamin VD3 therapy on the fundamental molecular basis underlying hepatic injury induced by chronic Pb toxicity. Twenty-four adult male rats were distributed equally into the negative controls (NC), positive controls (PC) and VD3 groups. While both the PC and VD3 groups received Pb-acetate in drinking water (1000 mg/L) for four weeks, the latter group also received intramuscular VD3 injections (1000 IU/kg; 3 days/week) simultaneously with Pb. The liver enzymes together with the serum and hepatic tissue Pb concentrations increased markedly in the PC group compared with the NC group. Pb toxicity also drastically induced hepatocyte apoptosis/necrosis, increased the hepatic tissue concentrations of malondialdehyde and the pro-inflammatory cytokines (TGF-β, IL-4 & TNF-α) as well as reduced the anti-oxidative enzymes (GSH, GPx & CAT) and the anti-inflammatory cytokine, IL-10, compared with the NC group. Pb also significantly decreased the serum concentrations of VD3 and Ca2+. Additionally, the hepatic expressions of VD receptor, Cyp24a1 enzyme, L-type Ca2+-channel, calbindin-D28k & -D29k, calmodulin and calmodulin-dependent protein kinase II were significantly upregulated, whereas the VD binding protein, CYP2R1 enzyme and T-type Ca2+-channel were markedly inhibited at the gene and protein levels following Pb intoxication. VD3 alleviated the hepatic damage, inhibited the oxidative stress and pro-inflammatory molecules as well as upregulated the anti-oxidant and anti-inflammatory markers and restored the expression of the VD/Ca2+ regulatory molecules compared with the PC group. VD3 supplementation discloses promising protective effects against Pb-induced hepatic damage, through its anti-inflammatory and antioxidant actions as well as by modulating the hepatocyte calcium homeostatic molecules.
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Affiliation(s)
- Hussain Almasmoum
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Bassem Refaat
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Mazen M Ghaith
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Riyad A Almaimani
- Biochemistry Department, Faculty of Medicine, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Shakir Idris
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Jawwad Ahmad
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia.
| | - Abdelghany H Abdelghany
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia; Department of Anatomy, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
| | - Mohammad A BaSalamah
- Pathology Department, Faculty of Medicine, Umm Al-Qura University, Al Abdeyah, Saudi Arabia.
| | - Mohamed El-Boshy
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Al Abdeyah, PO Box 7607, Makkah, Saudi Arabia; Department of Clinical Pathology, Fac. Vet. Med, Mansoura University, Mansoura, Egypt.
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Doodkanloy Milan F, Torabi M, Mirzaee M. The relationship between blood lead level and the severity of abdominal pain in opioid-addicted patients during a hospital outbreak. J Addict Dis 2019; 37:211-216. [PMID: 31580206 DOI: 10.1080/10550887.2019.1663088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
An increase in the incidence of abdominal pain in opioid abusers over a period of time increased the suspicion of lead poisoning. The severity of abdominal pain and its relationship with blood lead level (BLL) were investigated during a hospital outbreak. This was a descriptive, cross-sectional study on opioid-addicted patients presenting with abdominal pain. Pain severity was measured based on the numerical rating scale (NRS). Blood lead and serum uric acid levels were determined. The presence of basophilic stippling was sought in the peripheral blood smear. Also, the X-ray was performed to assess abdominal cavity. Of 239 patients, 160 opioid addicts presenting with abdominal pain participated in the study. There were significant associations between the severity of abdominal pain and the type of opioid, the route and, duration of opioid consumption, the presence of basophilic stippling in peripheral blood smear and radio-opaque opioids in abdominal X-ray, as well as BLL and serum uric acid level (P < 0.0001). Opium abuse is a common cause of lead poisoning in Iran. The patients with lead poisoning may present with abdominal pain. The severity of abdominal pain significantly correlated with BLL. Continuous screening of BLL is recommended in opioid abusers.
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Affiliation(s)
- Fatemeh Doodkanloy Milan
- Specialist in Emergency Medicine, Department of Emergency Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mehdi Torabi
- Associate Professor of Emergency Medicine, Department of Emergency Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Moghaddameh Mirzaee
- Associate professor Modeling in Health Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
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The Neuroprotective Role of Coenzyme Q10 Against Lead Acetate-Induced Neurotoxicity Is Mediated by Antioxidant, Anti-Inflammatory and Anti-Apoptotic Activities. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16162895. [PMID: 31412628 PMCID: PMC6720293 DOI: 10.3390/ijerph16162895] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/16/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022]
Abstract
Heavy metal exposure, in lead (Pb) particularly, is associated with severe neuronal impairment though oxidative stress mediated by reactive oxygen species, and antioxidants may be used to abolish these adverse effects. This study investigated the potential neuroprotective role of coenzyme Q10 (CoQ10) against lead acetate (PbAc)-induced neurotoxicity. Twenty-eight male Wistar albino rats were divided into four equal groups (n = 7) and treated as follows: the control group was injected with physiological saline (0.9% NaCl); the CoQ10 group was injected with CoQ10 (10 mg/kg); PbAc group was injected with PbAc (20 mg/kg); PbAc + CoQ10 group was injected first with PbAc, and after 1 h with CoQ10. All groups were injected intraperitoneally for seven days. PbAc significantly increased cortical lipid peroxidation, nitrate/nitrite levels, and inducible nitric oxide synthase expression, and decreased glutathione content, superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase activity and mRNA expression, as well as nuclear factor erythroid 2–related factor 2 (Nrf2) and homoxygenase-1 (HO-1) expression. PbAc also promoted the secretion of interleukin-1ß and tumor necrosis factor-α, inhibited interleukin-10 production, triggered the activation of pro-apoptotic proteins, and suppressed anti-apoptotic proteins. Additionally, PbAc increased the cortical levels of serotonin, dopamine, norepinephrine, GABA, and glutamate, and decreased the level of ATP. However, treatment with CoQ10 rescued cortical neurons from PbAc-induced neurotoxicity by restoring the balance between oxidants and antioxidants, activating the Nrf2/HO-1 pathway, suppressing inflammation, inhibiting the apoptotic cascade, and modulating cortical neurotransmission and energy metabolism. Altogether, our findings indicate that CoQ10 has beneficial effects against PbAc-induced neuronal damage through its antioxidant, anti-inflammatory, anti-apoptotic, and neuromodulatory activities.
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Sachdeva C, Thakur K, Sharma A, Sharma KK. Lead: Tiny but Mighty Poison. Indian J Clin Biochem 2018; 33:132-146. [PMID: 29651203 PMCID: PMC5891462 DOI: 10.1007/s12291-017-0680-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 07/11/2017] [Indexed: 01/24/2023]
Abstract
The documentation of lead toxicity (plumbism) dates back to the times when man learnt its various applications. This versatile heavy metal is non-degradable and its ability to get accumulated in the body that goes undiagnosed, makes it a serious environmental health hazard. Lead is now known to affect almost every organ/tissue of the human body. With irreversible effects on neurobiological development of young children and foetus, its toxicity has lasting implications on the human life. Outlining the symptoms, diagnosis and treatment therapy for lead poisoning, the present review elaborates the pathophysiological effects of lead on various organs. This will be of immense help to the health professionals so as to inculcate a better understanding of the lead poisoning which otherwise is asymptomatic. With chelation therapy being the classic path of treatment, new strategies are being explored as additive/adjunct therapy. It is now understood that lead toxicity is completely preventable. In this regard significant efforts are in place in the developed countries whereas much needs to be done in the developing countries. Spreading the awareness amongst the masses by educating them and reducing the usage of lead following stricter industry norms appears to be the only roadmap to prevent lead poisoning. Efforts being undertaken by the Government of India and other organisations are also mentioned.
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Affiliation(s)
- Chaffy Sachdeva
- Department of Biochemistry, Dr. Yashwant Singh Parmar Government Medical College, Nahan, Distt. Sirmaur, Himachal Pradesh 173001 India
| | - Kshema Thakur
- Department of Biochemistry, Dr. Yashwant Singh Parmar Government Medical College, Nahan, Distt. Sirmaur, Himachal Pradesh 173001 India
| | - Aditi Sharma
- Department of Microbiology and Community Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, 160012 India
| | - Krishan Kumar Sharma
- Department of Biochemistry, Dr. Yashwant Singh Parmar Government Medical College, Nahan, Distt. Sirmaur, Himachal Pradesh 173001 India
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Nam SM, Ahn SC, Go TH, Seo JS, Nahm SS, Chang BJ, Lee JH. Ascorbic Acid Ameliorates Gestational Lead Exposure-Induced Developmental Alteration in GAD67 and c-Kit Expression in the Rat Cerebellar Cortex. Biol Trace Elem Res 2018; 182:278-286. [PMID: 28685241 DOI: 10.1007/s12011-017-1086-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Accepted: 06/22/2017] [Indexed: 01/24/2023]
Abstract
In the present study, we investigated the effects of ascorbic acid on lead-exposed developing cerebellum. Female rats were divided into the following three groups: control (distilled water), lead (0.2% lead acetate), and lead plus ascorbic acid (100 mg/kg/day, 10% solution). To evaluate the effect of lead exposure and ascorbic acid treatment accurately on the cerebellar development for the gestational period, we halted further treatment with lead and ascorbic acid in the dams after delivery of the pups. Although the ascorbic acid slightly decreased the lead level in pups, lead level was still high in the group treated with lead plus ascorbic acid group compared with the control group. The blood lead levels indicated that the ascorbic acid could facilitate both the excretion and transfer of lead from a dam to its pups via milk. At postnatal day 21, lead exposure significantly reduced the number of Purkinje cells in the cerebellar cortex of pups. Additionally, lead treatment induced degenerative changes such as reduction of glutamic acid decarboxylase (GAD67) and c-kit expressions are observed in the developing cerebellar cortex. In the cerebellum of the pups from the lead plus ascorbic acid group, reduction of the number of Purkinje cells, GAD67 expression, and c-kit immunopositivity were remarkably restored compared with the lead group. Our present results suggested that ascorbic acid treatment to lead-exposed dam exerted protective effects on the developing cerebellum against lead-induced neurotoxicity.
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Affiliation(s)
- Sung Min Nam
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Sung Chuel Ahn
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Tae-Hun Go
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Jin Seok Seo
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Sang-Soep Nahm
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Byung-Joon Chang
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Jong-Hwan Lee
- Department of Anatomy, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea.
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Ghasemidehkordi B, Malekirad AA, Nazem H, Fazilati M, Salavati H, Shariatifar N, Rezaei M, Fakhri Y, Mousavi Khaneghah A. Concentration of lead and mercury in collected vegetables and herbs from Markazi province, Iran: a non-carcinogenic risk assessment. Food Chem Toxicol 2018; 113:204-210. [DOI: 10.1016/j.fct.2018.01.048] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/11/2018] [Accepted: 01/27/2018] [Indexed: 11/29/2022]
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Abstract
In March 2014, a 39-year-old Korean male presented with a 6-month history of various nonspecific symptoms including dizziness, fatigue, asthenia, irritability, elevated blood pressure, palpitation, eyestrain, and tinnitus. His occupational history revealed that he had been working as an indoor firing range manager for 13 months; therefore, he was subjected to a blood lead level (BLL) test. The test results showed a BLL of 64 μg/dL; hence, he was diagnosed with lead poisoning and immediately withdrawn from work. As evident from the workplace environmental monitoring, the level of lead exposure in the air exceeded its limit (0.015-0.387 mg/m³). He received chelation treatment with calcium-disodium ethylenediaminetetraacetic acid (1 g/day) for 5 days without any adverse effects. In the follow-up results after 2 months, the BLL had decreased to 9.7 μg/dL and the symptoms resolved. This report represents the first occupational case of lead poisoning in firing ranges in Korea, and this necessitates institutional management to prevent the recurrence of poisoning through this route. Workplace environmental monitoring should be implemented for indoor firing ranges, and the workers should undergo regularly scheduled special health examinations. In clinical practice, it is essential to question the patient about his occupational history.
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Affiliation(s)
- Kyung Wook Kang
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
- Department of Neurology, Aerospace Medical Center, Republic of Korea Air Force, Cheongju, Korea
| | - Won Ju Park
- Department of Occupational and Environmental Medicine, Chonnam National University Hwasun Hospital, Hwasun, Korea
- Department of Occupational and Environmental Medicine, Aerospace Medical Research Center, Republic of Korea Air Force, Cheongju, Korea.
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Mehta V, Midha V, Mahajan R, Narang V, Wander P, Sood R, Sood A. Lead intoxication due to ayurvedic medications as a cause of abdominal pain in adults. Clin Toxicol (Phila) 2016; 55:97-101. [PMID: 27957879 DOI: 10.1080/15563650.2016.1259474] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Though a majority of cases of lead intoxication come from occupational exposures, traditional and folk remedies have also been reported to contain toxic amounts of lead. We present a large series of patients with lead poisoning due to intake of Ayurvedic medicines, all of whom presented with unexplained abdominal pain. METHODOLOGY This was a retrospective, observational case series from a tertiary care center in India. The charts of patients who underwent blood lead level (BLL) testing as a part of workup for unexplained abdominal pain between 2005 and 2013 were reviewed. The patients with lead intoxication (BLLs >25 μg/dl) were identified and demographics, history, possible risk factors, clinical presentation and investigations were reviewed. Treatment details, duration, time to symptomatic recovery, laboratory follow-up and adverse events during therapy were recorded. RESULTS BLLs were tested in 786 patients with unexplained abdominal pain and high levels were identified in 75 (9.5%) patients, of which a majority (73 patients, 9.3%) had history of Ayurvedic medication intake and only two had occupational exposure. Five randomly chosen Ayurvedic medications were analyzed and lead levels were impermissibly high (14-34,950 ppm) in all of them. Besides pain in abdomen, other presenting complaints were constipation, hypertension, neurological symptoms and acute kidney injury. Anemia and abnormal liver biochemical tests were observed in all the 73 patients. Discontinuing the Ayurvedic medicines and chelation with d-penicillamine led to improvement in symptoms and reduction in BLLs in all patients within 3-4 months. CONCLUSION The patients presenting with severe recurrent abdominal pain, anemia and history of use of Ayurvedic medicines should be evaluated for lead toxicity. Early diagnosis in such cases can prevent unnecessary investigations and interventions, and permits early commencement of the treatment.
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Affiliation(s)
- Varun Mehta
- a Department of Gastroenterology , Dayanand Medical College , Ludhiana , India
| | - Vandana Midha
- b Department of Internal Medicine , Dayanand Medical College , Ludhiana , India
| | - Ramit Mahajan
- a Department of Gastroenterology , Dayanand Medical College , Ludhiana , India
| | - Vikram Narang
- c Department of Pathology , Dayanand Medical College , Ludhiana , India
| | - Praneet Wander
- a Department of Gastroenterology , Dayanand Medical College , Ludhiana , India
| | - Ridhi Sood
- a Department of Gastroenterology , Dayanand Medical College , Ludhiana , India
| | - Ajit Sood
- a Department of Gastroenterology , Dayanand Medical College , Ludhiana , India
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Michalak I, Wołowiec P, Chojnacka K. Determination of exposure to lead of subjects from southwestern Poland by human hair analysis. ENVIRONMENTAL MONITORING AND ASSESSMENT 2014; 186:2259-67. [PMID: 24346348 PMCID: PMC3939012 DOI: 10.1007/s10661-013-3534-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 11/12/2013] [Indexed: 05/22/2023]
Abstract
The aim of the present work was to investigate the exposure to lead from various sources by investigation of mineral composition of human scalp hair. The research was carried out on hair sampled from 267 young adults living in Wrocław (southwest Poland). The effect of the place of residence, diet, and lifestyle on lead content in hair was examined by inductively coupled plasma optical emission spectrometry (ICP-OES). Lead was determined at the wavelength 220.353 nm. These outcomes were reached by linking the results of lead level in hair with the results of questionnaire survey. The mean lead level in hair of the whole examined population was 2.01 ± 2.10 mg kg(-1). Lead can enter the human body mainly by inhalation and gastrointestinal absorption. It was found that consuming cheese, fish, and lettuce caused increased level of lead in hair. On the other hand, drinking of milk, tea, coffee, or lemon resulted in decreased content of lead in hair. Additional source of exposure to lead could be cigarette smoking, distance to the traffic road, painting the walls, amalgam filling. Based on the results, it can be concluded that exposure to lead can occur mainly from eating habits and environmental exposure.
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Affiliation(s)
- Izabela Michalak
- Institute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, Smoluchowskiego 25, 50-372 Wroclaw, Poland
| | - Paulina Wołowiec
- Institute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, Smoluchowskiego 25, 50-372 Wroclaw, Poland
| | - Katarzyna Chojnacka
- Institute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, Smoluchowskiego 25, 50-372 Wroclaw, Poland
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Thymoquinone ameliorates lead-induced brain damage in Sprague Dawley rats. ACTA ACUST UNITED AC 2013; 66:13-7. [PMID: 23910425 DOI: 10.1016/j.etp.2013.07.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 05/30/2013] [Accepted: 07/05/2013] [Indexed: 11/20/2022]
Abstract
The present study aims to investigate the protective effects of thymoquinone, the major active ingredient of Nigella sativa seeds, against lead-induced brain damage in Sprague-Dawley rats. In which, 40 rats were divided into four groups (10 rats each). The first group served as control. The second, third and fourth groups received lead acetate, lead acetate and thymoquinone, and thymoquinone only, respectively, for one month. Lead acetate was given in drinking water at a concentration of 0.5 g/l (500 ppm). Thymoquinone was given daily at a dose of 20mg/kg b.w. in corn oil by gastric tube. Control and thymoquinone-treated rats showed normal brain histology. Treatment of rats with lead acetate was shown to produce degeneration of endothelial lining of brain blood vessels with peri-vascular cuffing of mononuclear cells consistent to lymphocytes, congestion of choroid plexus blood vessels, ischemic brain infarction, chromatolysis and neuronal degeneration, microglial reaction and neuronophagia, degeneration of hippocampal and cerebellar neurons, and axonal demyelination. On the other hand, co-administration of thymoquinone with lead acetate markedly decreased the incidence of lead acetate-induced pathological lesions. Thus the current study shed some light on the beneficial effects of thymoquinone against neurotoxic effects of lead in rats.
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Venkatesh T. Editorial role of a clinical biochemist in evaluating the impact of lead poisoning. Indian J Clin Biochem 2013; 28:1-2. [PMID: 24381413 PMCID: PMC3547441 DOI: 10.1007/s12291-012-0290-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Thuppil Venkatesh
- Professor Emeritus Department of Biochemistry and Biophysics, Quality Council of India, National Referral Centre for Lead Projects in India (NRCLPI), St John’s Medical College, Bangalore, 560034 India
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