Fabio Eduardo Dos Santos, Marcos Schleiden Sousa Carvalho, Maria Das GraçGraçAs Cardoso, Luciane Resende Vilela, Larissa Fonseca Andrade-Vieira
{"title":"Bioactivity of hydroalcoholic extracts from <i>tropaeolum majus</i> L. (tropaeolaceae) on the germination, initial plant development and cell cycle of <i>Lactuca sativa</i> L.","authors":"Fabio Eduardo Dos Santos, Marcos Schleiden Sousa Carvalho, Maria Das GraçGraçAs Cardoso, Luciane Resende Vilela, Larissa Fonseca Andrade-Vieira","doi":"10.1080/15287394.2024.2349107","DOIUrl":"10.1080/15287394.2024.2349107","url":null,"abstract":"<p><p>Natural products are usually considered harmless; however, these substances need to be consumed with caution. Biological assays with plant models are a suitable alternative for prospective studies to assess natural product-initiated toxicity. The aim of this study was to examine the toxic potential of leaf and flower extracts derived from <i>Tropaeolum majus</i> L. a widely used plant in traditional medicine. Seeds of <i>Lactuca sativa</i> L. were exposed to <i>T. majus</i> extracts and based upon the seedling growth curve values, the 50% Inhibition Concentration (IC<sub>50</sub>) was calculated and applied for cell cycle analysis exposure. Both extracts contained organic acids, proteins, amino acids, and terpene steroids. Sesquiterpene lactones and depside were detected in leaf extracts. The higher concentration tested exhibited a marked phytotoxic effect. The extracts induced clastogenic, aneugenic cytotoxic, and potential mutagenic effects. The possible relationships between the classes of compounds found in the extracts and effects on cells and DNA were determined.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"579-591"},"PeriodicalIF":2.6,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140856726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Raquel Stefanello, Raissa Tainá Puntel, Wagner Jesus da Silva Garcia, Lucio Strazzabosco Dorneles
{"title":"Mitigating salt stress by conditioning seeds with ultraviolet light (UV-C) in white oats (<i>Avena sativa</i> L.).","authors":"Raquel Stefanello, Raissa Tainá Puntel, Wagner Jesus da Silva Garcia, Lucio Strazzabosco Dorneles","doi":"10.1080/15287394.2024.2345878","DOIUrl":"https://doi.org/10.1080/15287394.2024.2345878","url":null,"abstract":"<p><p>Seed conditioning with ultraviolet light (UV-C) might (1) improve crop yield and quality, (2) reduce the use of agrochemicals during cultivation, and (3) increase plant survival in high salinity environments. The aim of this study was to examine the effects of UV-C conditioning of white oat seeds at two doses (0.85 and 3.42 kJ m<sup>-2</sup>) under salinity stress (100 mM NaCl). Seeds were sown on germination paper and kept in a germination chamber at 20°C. Germination and seedling growth parameters were evaluated after 5 and 10 days. Data demonstrated that excess salt reduced germination and initial growth of white oat seedlings. In all the variables analyzed, exposure of seeds to UV-C under salt stress exerted a positive effect compared to non-irradiated control. The attenuating influence of UV-C in germination was greater at 0.85 than at 3.42 kJ m<sup>-2</sup>. Thus, data indicate that conditioning white oat seeds in UV-C light produced greater tolerance to salt stress. These findings suggest that UV-C conditioning of white oat seeds may be considered as a simple and economical strategy to alleviate salt-induced stress.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":"87 13","pages":"533-540"},"PeriodicalIF":2.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140873546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anju Maharjan, Ravi Gautam, GiYong Lee, DongYoon Kim, DaEun Lee, Manju Acharya, HyoungAh Kim, Yong Heo, ChangYul Kim
{"title":"Assessment of skin sensitization potential of zinc oxide, aluminum oxide, manganese oxide, and copper oxide nanoparticles through the local lymph node assay: 5-bromo-deoxyuridine flow cytometry method.","authors":"Anju Maharjan, Ravi Gautam, GiYong Lee, DongYoon Kim, DaEun Lee, Manju Acharya, HyoungAh Kim, Yong Heo, ChangYul Kim","doi":"10.1080/15287394.2024.2357466","DOIUrl":"https://doi.org/10.1080/15287394.2024.2357466","url":null,"abstract":"<p><p>The advent of nanotechnology has significantly spurred the utilization of nanoparticles (NPs) across diverse sectors encompassing industry, agriculture, engineering, cosmetics, and medicine. Metallic oxides including zinc oxide (ZnO), copper oxide (CuO), manganese oxide (Mn<sub>2</sub>O<sub>3</sub>), and aluminum oxide (Al<sub>2</sub>O<sub>3</sub>), in their NP forms, have become prevalent in cosmetics and various dermal products. Despite the expanding consideration of these compounds for dermal applications, their potential for initiating skin sensitization (SS) has not been comprehensively examined. An <i>in vivo</i> assay, local lymph node assay: 5-bromo-2-deoxyuridine-flow cytometry method (LLNA: BrdU-FCM) recognized as an alternative testing method for screening SS potential was used to address these issues. Following the OECD TG 442B guidelines, NPs suspensions smaller than 50 nm size were prepared for ZnO and Al<sub>2</sub>O<sub>3</sub> at concentrations of 10, 25, and 50%, and Mn<sub>2</sub>O<sub>3</sub> and CuO at concentrations of 5, 10, and 25%, and applied to the dorsum of each ear of female BALB/c mice on a daily basis for 3 consecutive days. Regarding the prediction of test substance to skin sensitizer if sensitization index (SI)≥2.7, all 4 NPs were classified as non-sensitizing. The SI values were below 2.06, 1.33, 1.42, and 0.99 for ZnO, Al<sub>2</sub>O<sub>3</sub>, Mn<sub>2</sub>O<sub>3</sub>, and CuO, respectively, at all test concentrations. Although data presented were negative with respect to adverse SS potential for these 4 NPs, further confirmatory tests addressing other key events associated with SS adverse outcome pathway need to be carried out to arrive at an acceptable conclusion on the skin safety for both cosmetic and dermal applications.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"1-11"},"PeriodicalIF":2.6,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141154898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hong Chen, Chun-Jie Zhang, Zhi-Ying Zhao, Yang-Yang Gao, Jian-Tian Zhao, Xiao-Xu Li, Ming Zhang, He Wang
{"title":"Mechanisms underlying LncRNA SNHG1 regulation of Alzheimer's disease involve DNA methylation.","authors":"Hong Chen, Chun-Jie Zhang, Zhi-Ying Zhao, Yang-Yang Gao, Jian-Tian Zhao, Xiao-Xu Li, Ming Zhang, He Wang","doi":"10.1080/15287394.2024.2334248","DOIUrl":"10.1080/15287394.2024.2334248","url":null,"abstract":"<p><p>Alzheimer's disease (AD) is a neurodegenerative disease associated with long non-coding RNAs and DNA methylation; however, the mechanisms underlying the role of lncRNA small nucleolar RNA host gene 1 (lncRNA SNHG1) and subsequent involvement of DNA methylation in AD development are not known. The aim of this study was to examine the regulatory mechanisms attributed to lncRNA SNHG1 gene utilizing 2 strains of senescence-accelerated mouse prone 8 (SAMP8) model of AD and compared to senescence-accelerated mouse resistant (SAMR) considered a control. Both strains of the mouse were transfected with either blank virus, psLenti-U6-SNHG1(low gene expression) virus, and psLenti-pA-SNHG1(gene overexpression) virus via a single injection into the brains for 2 weeks. At 2 weeks mice were subjected to a Morris water maze to determine any behavioral effects followed by sacrifice to extract hippocampal tissue for Western blotting to measure protein expression of p-tau, DNMT1, DNMT3A, DNMT3B, TET1, and p-Akt. No marked alterations were noted in any parameters following blank virus transfection. In SAMP8 mice, a significant decrease was noted in protein expression of DNMT1, DNMT3A, DNMT3B, and p-Akt associated with rise in p-tau and TET1. Transfection with ps-Lenti-U6-SNHG1 alone in SAMR1 mice resulted in a significant rise in DNMTs and p-Akt and a fall in p-tau and TET1. Transfection of SAMP8 with ps-Lenti-U6-SNHG1 blocked effects on overexpression noted in this mouse strain. However, knockdown of lncRNA SNHG1 yielded the opposite results as found in SAMR1 mice. In conclusion, the knockdown of lncRNA SNHG1 enhanced DNA methylation through the PI3K/Akt signaling pathway, thereby reducing the phosphorylation levels of tau in SAMP8 AD model mice with ameliorating brain damage attributed to p-tau accumulation with consequent neuroprotection.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"428-435"},"PeriodicalIF":2.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140319938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Correction.","authors":"","doi":"10.1080/15287394.2023.2284009","DOIUrl":"10.1080/15287394.2023.2284009","url":null,"abstract":"","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"i"},"PeriodicalIF":2.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138048831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jing-Bo He, He Zhang, Hong-Xia Zheng, Jian-Xin Jia, Yi-Chi Zhang, Xu-Sheng Yan, Xiao-Xu Li, Kai-Wen Wei, Jun Mao, Hong Chen, Jing Li, He Wang, Ming Zhang, Zhi-Ying Zhao
{"title":"Effects of schisandrin B on hypoxia-related cognitive function and protein expression in vascular dementia rats.","authors":"Jing-Bo He, He Zhang, Hong-Xia Zheng, Jian-Xin Jia, Yi-Chi Zhang, Xu-Sheng Yan, Xiao-Xu Li, Kai-Wen Wei, Jun Mao, Hong Chen, Jing Li, He Wang, Ming Zhang, Zhi-Ying Zhao","doi":"10.1080/15287394.2024.2334247","DOIUrl":"10.1080/15287394.2024.2334247","url":null,"abstract":"<p><p>Vascular dementia (VD) a heterogenous group of brain disorders in which cognitive impairment is attributable to vascular risk factors and cerebrovascular disease. A common phenomenon in VD is a dysfunctional cerebral regulatory mechanism associated with insufficient cerebral blood flow, ischemia and hypoxia. Under hypoxic conditions oxygen supply to the brain results in neuronal death leading to neurodegenerative diseases including Alzheimer's (AD) and VD. In conditions of hypoxia and low oxygen perfusion, expression of hypoxia-inducible factor 1 alpha (HIF-1α) increases under conditions of low oxygen and low perfusion associated with upregulation of expression of hypoxia-upregulated mitochondrial movement regulator (HUMMR), which promotes anterograde mitochondrial transport by binding with trafficking protein kinesin 2 (TRAK2). Schisandrin B (Sch B) an active component derived from Chinese herb Wuweizi prevented β-amyloid protein induced morphological alterations and cell death using a SH-SY5Y neuronal cells considered an AD model. It was thus of interest to determine whether Sch B might also alleviate VD using a rat bilateral common carotid artery occlusion (BCAO) dementia model. The aim of this study was to examine the effects of Sch B in BCAO on cognitive functions such as Morris water maze test and underlying mechanisms involving expression of HIF-1α, TRAK2, and HUMMR levels. The results showed that Sch B improved learning and memory function of rats with VD and exerted a protective effect on the hippocampus by inhibition of protein expression of HIF-1α, TRAK2, and HUMMR factors. Evidence indicates that Sch B may be considered as an alternative in VD treatment.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"421-427"},"PeriodicalIF":2.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140319937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lu Wang, Jian-Xin Jia, Shi-Bin Zhang, Wei Song, Xu-Sheng Yan, Dong-Sheng Huo, He Wang, Li-E Wu, Zhan-Jun Yang
{"title":"The protective effect and mechanism of glycosides of <i>cistanche deserticola</i> on rats in middle cerebral artery occlusion (MCAO) model.","authors":"Lu Wang, Jian-Xin Jia, Shi-Bin Zhang, Wei Song, Xu-Sheng Yan, Dong-Sheng Huo, He Wang, Li-E Wu, Zhan-Jun Yang","doi":"10.1080/15287394.2024.2337365","DOIUrl":"10.1080/15287394.2024.2337365","url":null,"abstract":"<p><p>Cerebral ischemia-reperfusion injury (CIRI) occurs frequently clinically as a complication following cardiovascular resuscitation resulting in neuronal damage specifically to the hippocampal CA1 region with consequent cognitive impairment. Apoptosis and oxidative stress were proposed as major risk factors associated with CIRI development. Previously, glycosides obtained from <i>Cistanche deserticola</i> (CGs) were shown to play a key role in counteracting CIRI; however, the underlying mechanisms remain to be determined. This study aimed to investigate the neuroprotective effect of CGs on subsequent CIRI in rats. The model of CIRI was established for 2 hr and reperfusion for 24 hr by middle cerebral artery occlusion (MCAO) model. The MCAO rats were used to measure the antioxidant and anti-apoptotic effects of CGs on CIRI. Neurological function was evaluated by the Longa neurological function score test. 2,3,5-Triphenyltetrazolium chloride (TTC) staining was used to detect the area of cerebral infarction. Nissl staining was employed to observe neuronal morphology. TUNEL staining was used to detect neuronal apoptosis, while Western blot determined protein expression levels of factors for apoptosis-related and PI3K/AKT/Nrf2 signaling pathway. Data demonstrated that CGs treatment improved behavioral performance, brain injury, and enhanced antioxidant and anti-apoptosis in CIRI rats. In addition, CGs induced activation of PI3K/AKT/Nrf2 signaling pathway accompanied by inhibition of the expression of apoptosis-related factors. Evidence indicates that CGs amelioration of CIRI involves activation of the PI3K/AKT/Nrf2 signaling pathway associated with increased cellular viability suggesting these glycosides may be considered as an alternative compound for CIRI treatment.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"448-456"},"PeriodicalIF":2.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140337715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of total flavonoids of <i>Dracocephalum moldavica L</i>. On neuroinflammation in Alzheimer's disease model amyloid-β (Aβ1-42)-peptide-induced astrocyte activation.","authors":"Wei Ren, Xu-Sheng Yan, Jia-Cheng Fan, Dong-Sheng Huo, Xin-Xin Wang, Jian-Xin Jia, Zhan-Jun Yang","doi":"10.1080/15287394.2024.2336570","DOIUrl":"10.1080/15287394.2024.2336570","url":null,"abstract":"<p><p>One of the main pathological features noted in Alzheimer's disease (AD) is the presence of plagues of aggregated β-amyloid (Aβ1-42)-peptides. Excess deposition of amyloid-β oligomers (AβO) are known to promote neuroinflammation. Sequentially, following neuroinflammation astrocytes become activated with cellular characteristics to initiate activated astrocytes. The purpose of this study was to determine whether total flavonoids derived from <i>Dracocephalum moldavica L</i>. (TFDM) inhibited Aβ1-42-induced damage attributed to activated C8-D1A astrocytes. Western blotting and ELISA were used to determine the expression of glial fibrillary acidic protein (GFAP), and complement C3 to establish the activation status of astrocytes following induction from exposure to Aβ1-42. Data demonstrated that stimulation of C8-D1A astrocytes by treatment with 40 μM Aβ1-42 for 24 hr produced significant elevation in protein expression and protein levels of acidic protein (GFAP) and complement C3 accompanied by increased expression and levels of inflammatory cytokines. Treatment with TFDM or the clinically employed drug donepezil in AD therapy reduced production of inflammatory cytokines, and toxicity initiated following activation of C8-D1A astrocytes following exposure to Aβ1-42. Therefore, TFDM similar to donepezil inhibited inflammatory secretion in reactive astrocytes, suggesting that TFDM may be considered as a potential compound to be utilized in AD therapy.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"436-447"},"PeriodicalIF":2.6,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140337753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luz M Vidal, Emilio Pimentel, Luis Escobar-Alarcón, Martha P Cruces, Elizabeth Jiménez, Hugo Suárez, Yosary Leyva
{"title":"Toxicity evaluation of novel imidacloprid nanoribbons, using somatic mutation and fitness indexes in <i>Drosophila melanogaster</i>.","authors":"Luz M Vidal, Emilio Pimentel, Luis Escobar-Alarcón, Martha P Cruces, Elizabeth Jiménez, Hugo Suárez, Yosary Leyva","doi":"10.1080/15287394.2024.2316649","DOIUrl":"10.1080/15287394.2024.2316649","url":null,"abstract":"<p><p>Nanoribbons of imidacloprid, a systemic and chloronicotinyl insecticide, were successfully synthesized by laser-induced fragmentation/exfoliation of imidacloprid powders suspended in water, with widths ranging from 160 to 470 nm, lengths in the micron scale, and thickness of a few atoms layers. The aim of the present study was to examine the effects of acute and chronic exposure to imidacloprid (IMC) bulk and compare its effects with synthesized imidacloprid nanoribbons (IMCNR) on larval and adult viability, developmental time, olfactory capacity, longevity, productivity, and genotoxicity in <i>Drosophila melanogaster</i>. Larvae or adults were exposed at 0.01, 0.02, or 0.03 ppm to IMC or IMCNR. Results demonstrated that IMCNR produced a significant reduction in viability and olfactory ability. IMC did not significantly alter viability and olfactory ability. Similarly, marked differences on longevity were detected between treatment with IMC and IMCNR where the lifespan of males treated with IMC was significantly higher than control while IMCNR produced a reduction. As for productivity, developmental time, and genotoxicity, no marked differences were found between both forms of IMC.</p>","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"398-418"},"PeriodicalIF":2.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139934292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Expression of Concern: Splenda Alters Gut Microflora and Increases Intestinal P-Glycoprotein and Cytochrome P-450 in Male Rats.","authors":"","doi":"10.1080/15287394.2024.2321747","DOIUrl":"10.1080/15287394.2024.2321747","url":null,"abstract":"","PeriodicalId":54758,"journal":{"name":"Journal of Toxicology and Environmental Health-Part A-Current Issues","volume":" ","pages":"419"},"PeriodicalIF":2.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140102871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}