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Journal of Biochemical and Molecular Toxicology

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https://www.readbyqxmd.com/read/29214690/%C3%AE-lipoic-acid-inhibits-testicular-and-epididymal-oxidative-damage-and-improves-fertility-efficacy-in-arsenic-intoxicated-rats
#1
Papisetty Prathima, Ramanadhapuram Pavani, Sadepalli Sukeerthi, Sri Bhashyam Sainath
The present study evaluates the protective effect of α-lipoic acid (LA) against arsenic-induced testicular and epididymal oxidative damage in rats. Arsenic caused significant reduction in the reproductive organ weights, serum testosterone levels, testicular daily sperm count, epididymal sperm count, sperm motility, sperm viability, and sperm membrane integrity. Significant reduction in the activity levels of superoxide dismutase, catalase, and glutathione levels with a concomitant increase in the lipid peroxidation and protein carbonyl content in the testis and the cauda epididymis of arsenic-exposed rats...
December 7, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29214688/nootkatone-confers-hepatoprotective-and-anti-fibrotic-actions-in-a-murine-model-of-liver-fibrosis-by-suppressing-oxidative-stress-inflammation-and-apoptosis
#2
Amani Kurdi, Kamal Hassan, Balaji Venkataraman, Mohanraj Rajesh
In this study, the hepatoprotective and anti-fibrotic actions of nootkatone (NTK) were investigated using carbon tetrachloride (CCl4 )-induced liver fibrosis in mice. CCl4 administration elevated serum aspartate and alanine transaminases levels, respectively. In addition, CCl4 produced hepatic oxidative and nitrative stress, characterized by diminished hemeoxygenase-1 expression, antioxidant defenses, and accumulation of 4-hydroxynonenal and 3-nitrotyrosine. Furthermore, CCl4 administration evoked profound expression of pro-inflammatory cytokine expressions such as tumor necrosis factor-α, monocyte chemoattractant protein-1, and interleukin-1β in hepatic tissues, which corroborated with nuclear factor κB activation...
December 7, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29205955/selection-of-antioxidants-against-ovarian-oxidative-stress-in-mouse-model
#3
Bojiang Li, Qiannan Weng, Zequn Liu, Ming Shen, Jiaqing Zhang, Wangjun Wu, Honglin Liu
Oxidative stress (OS) plays an important role in the process of ovarian granulosa cell apoptosis and follicular atresia. The aim of this study was to select antioxidant against OS in ovary tissue. Firstly, we chose the six antioxidants and analyzed the reactive oxygen species (ROS) level in the ovary tissue. The results showed that proanthocyanidins, gallic acid, curcumin, and carotene decrease the ROS level compared with control group. We further demonstrated that both proanthocyanidins and gallic acid increase the antioxidant enzymes activity...
December 4, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29205703/lncrna-neat1-promotes-dexamethasone-resistance-in-multiple-myeloma-by-targeting-mir-193a-mcl1-pathway
#4
Yilan Wu, Han Wang
Although dexamethasone (DEX) remains a first-line agent for multiple myeloma (MM) therapy, the development of DEX resistance has become an indicator of poor prognosis in MM patients. It is thus urgent to develop strategies to restore the vulnerability of MM to DEX. This study demonstrated long non-coding RNA (lncRNA) nuclear paraspeckle assembly transcript 1 (NEAT1) was highly expressed in DEX-resistant myeloma cell lines, and upregulation of NEAT1 was tightly linked to poor prognosis. The in-depth study revealed that during the development of DEX resistance in these cells, the miR-193a levels were decreased, which resulted in the increased expression of the target gene myeloid cell leukemia-1 (MCL1)...
December 4, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29205667/the-effect-of-postnatal-manganese-exposure-on-the-nmda-receptor-signaling-pathway-in-rat-hippocampus
#5
Lei Wang, HuanHuan Fu, Bin Liu, XiaoYan Liu, WeiWei Chen, XiaoDan Yu
Overexposure to manganese (Mn) is associated with neurological disorders in children. Evidence indicated that N-methyl-d-aspartate (NMDA) receptor signaling pathway was critical for neurobehavioral function. However, whether NMDA receptor signaling pathway contributes to Mn-induced neurotoxicity remains unknown. In this study, newborn Sprague-Dawley rats were randomly assigned to four groups exposed to 0, 10, 20, and 30 mg/kg of Mn2+ by intraperitoneal injection (n = 10/group: five males and five females)...
December 4, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29149534/novel-n-propylphthalimide-and-4-vinylbenzyl-substituted-benzimidazole-salts-synthesis-characterization-and-determination-of-their-metal-chelating-effects-and-inhibition-profiles-against-acetylcholinesterase-and-carbonic-anhydrase-enzymes
#6
Yakup Sarı, Aydın Aktaş, Parham Taslimi, Yetkin Gök, İlhami Gulçin
The novel N-propylphthalimide-substituted and 4-vinylbenzyl-substituted N-heterocyclic carbene (NHC) precursors were synthesized by N-substituted benzimidazolium with aryl halides. The novel N-propylphthalimide-substituted and 4-vinylbenzyl-substituted NHC precursors have been characterized by using (1) H NMR, (13) C NMR, FTIR spectroscopy, and elemental analysis techniques. They were tested for the inhibition of AChE and hCA enzymes and demonstrated efficient inhibition profiles with Ki values in the range of 351...
November 17, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29140578/alleviation-of-cadmium-induced-oxidative-stress-by-trehalose-via-inhibiting-the-nrf2-keap1-signaling-pathway-in-primary-rat-proximal-tubular-cells
#7
Xin-Yu Wang, Zhen-Yong Wang, Yi-Song Zhu, Si-Ming Zhu, Rui-Feng Fan, Lin Wang
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that regulates a cluster of oxidative stress-inducible genes in cells. Here, we aimed to investigate whether trehalose (Tre) protects primary rat proximal tubular (rPT) cells against cadmium (Cd)-induced oxidative stress via Nrf2 antioxidant pathway. Data showed that Tre treatment inhibited Nrf2 nuclear translocation and restored the decline in Kelch-like ECH-associated protein 1 (Keap1) protein level in Cd-exposed rPT cells. Moreover, Cd-activated Nrf2 target genes, including phase II detoxifying enzymes, that is, NAD(P)H quinone oxidoreductase 1 and heme oxygenase-1, direct antioxidant proteins, that is, glutathione peroxidase, superoxide dismutase, catalase, and glutathione biosynthesis-related proteins, that is, glutamatecysteine ligase catalytic subunit, glutamate cysteine ligase modifier subunit, and glutathione reductase, were all downregulated by co-treatment with Tre...
November 15, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29131471/the-toxicological-effects-of-some-avermectins-on-goat-liver-carbonic-anhydrase-enzyme
#8
Cuneyt Caglayan, İlhami Gulcin
Avermectins are used worldwide as antiparasitic drugs in the field of veterinary medicine and as agricultural pesticides and insecticides. Carbonic anhydrase (CA, E.C. 4.2.1.1) is a zinc-containing metalloenzyme that catalyzes the reversible hydration of carbon dioxide (CO2 ) to yield protons (H(+) ) and bicarbonate (HCO3(-) ). In this study, some avermectins, including abamectin, doramectin, eprinomectin, and moxidectin, were investigated for in vitro inhibitory effects on the CA enzyme purified from goat liver, which was purified (125...
November 13, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29131470/synthesis-of-some-novel-pyridine-compounds-containing-bis-1-2-4-triazole-thiosemicarbazide-moiety-and-investigation-of-their-antioxidant-properties-carbonic-anhydrase-and-acetylcholinesterase-enzymes-inhibition-profiles
#9
Nilufer Bulut, Umit M Kocyigit, Ibrahim H Gecibesler, Taner Dastan, Huseyin Karci, Parham Taslimi, Sevgi Durna Dastan, Ilhami Gulcin, Ahmet Cetin
Some novel derivatives of thiosemicarbazide and 1,2,4-triazole-3-thiol were synthesized and evaluated for their biological activities. The title compounds were prepared starting from readily available pyridine-2,5-dicarboxylic acid. The reaction carboxylic acid with absolute ethanol afforded the corresponding dimethyl pyridine-2,5-dicarboxylate (1). The reaction of dimethyl-2,5-pyridinedicarboxylate (1) with hydrazine hydrate good yielded pyridine-2,5-dicarbohydrazide (2). Refluxing compound 2 with alkyl/aryl isothiocyanate derivatives for 3-8 h afforded 1,4-disubstituted thiosemicarbazides (3a-e)...
November 13, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29112301/ribavirin-augments-doxorubicin-s-efficacy-in-human-hepatocellular-carcinoma-through-inhibiting-doxorubicin-induced-eif4e-activation
#10
Jun Tan, Jingfen Ye, Meijun Song, Mi Zhou, Yaoren Hu
Activation of eukaryotic translation initiation factor 4E (eIF4E) is a cellular survival mechanism in response to chemotherapy in cancers. In this work, we demonstrate that targeting eIF4E by ribavirin sensitizes hepatocellular carcinoma (HCC) cell response to doxorubicin. Ribavirin inhibits growth and survival of HCC cells, and to a greater extent than in normal liver cells. Its combination with doxorubicin achieves greater efficacy than single drug in vitro and in vivo. Ribavirin suppresses phosphorylation of molecules involved in Akt/mTOR/eIF4E pathway...
November 7, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29077251/in-vitro-and-in-vivo-antithrombotic-and-cytotoxicity-effects-of-ferulic-acid
#11
Jun-Hui Choi, Jong-Kook Park, Ki-Man Kim, Hyo-Jeong Lee, Seung Kim
We discovered recently in vitro and in vivo antithrombotic and cytotoxicity effects of ferulic acid. The cytotoxicity assays showed that ferulic acid (∼300 μg/mL) did not cause any significant toxicity on three cell lines, platelets, leukocytes, and erythrocytes. In vitro assays showed inhibitory effects of ferulic acid on thrombin (THR)- or collagen/epinephrine-stimulated platelet activation by inhibiting platelet aggregation, and decreasing clot retraction activity. The in vitro effect of ferulic acid on THR-stimulated platelet activation was proved by the decrease in the secretion of serotonin from the platelets...
October 27, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29077241/the-susceptibility-to-autoxidation-of-erythrocytes-in-diabetic-mice-effects-of-melatonin-and-pentoxifylline
#12
Mehmet Ramazan Şekeroğlu, Zübeyir Huyut, Erdem Çokluk, Hanefi Özbek, Hamit Hakan Alp
Oxidative stress had a great importance in development of complications in diabetes. We investigated effects of melatonin and pentoxifylline in diabetic mice. Swiss albino mice (n = 40) were divided into four groups: alloxan-induced diabetes mellitus (DM), alloxan-induced diabetes with melatonin supplementation (DM + MLT), alloxan-induced diabetes with pentoxifylline supplementation (DM + PTX), and control. Glutathione-peroxidase (GSH-Px) activity, malondialdehyde (MDA) and reduced glutathione (GSH) levels, and susceptibility to oxidation of erythrocytes were measured...
October 27, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29071762/combination-of-carvacrol-with-simvastatin-improves-the-lipid-lowering-efficacy-and-alleviates-simvastatin-side-effects
#13
Hayat A Abd El Aal, Lamiaa A Ahmed, Wedad A Hassan, Hala M Fawzy, Helmy Moawad
The present investigation was designed to examine the possible additive hypolipidemic effect of carvacrol (CARV) in combination with simvastatin (SIM) on poloxamer 407 (P407)-induced hyperlipidemia. Rats were injected with P407,(500 mg/ kg; i.p.), twice a week, for 30 days. Treatment was carried out by administration of SIM (20 mg/kg/day; p.o.) or CARV (50 mg/kg/day; p.o.) or combination of them. Treatment with CARV significantly decreased total cholesterol, triglycerides, low-density lipoprotein, atherogenic index, leptin, and increased high-density lipoprotein and adiponectin...
October 26, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29071757/potential-cow-milk-xanthine-oxidase-inhibitory-and-antioxidant-activity-of-selected-phenolic-acid-derivatives
#14
Shivraj Hariram Nile, Young Soo Keum, Arti Shivraj Nile, Young Deuk Kwon, Doo Hwan Kim
Xanthine oxidase (XO) found in all mammals and excess activity leads to urolithiasis. The cow milk XO was purified to 305-fold with a specific activity of 8.76 EU/mg and overall yield of 87% by using DEAE-Sepharose chromatography. The phenolics showed potent XO inhibitory effect with Ki , P1 (0.412), P2 (0.632), P3 (0.585), P4 (0.886), P5 (1.633), P6 (0.503), P7 (2.882), P8 (3.761), P9 (4.487), and P10 (5.841) μM. The phenolics P9 and P10 exhibited uncompetitive inhibition; the phenolics P1, P2, P3, P4, and P6 showed competitive inhibition, and other phenolic acids showed noncompetitive inhibition...
October 26, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28972679/synthesis-structure-and-biological-active-evaluation-of-a-new-cyclic-tetranuclear-copper-ii-complex-bridged-both-by-oxamido-and-carboxylate-groups
#15
Mei-Jiao Zhang, Fang Liu, Yan-Tuan Li, Cui-Wei Yan, Zhi-Yong Wu
A new tetracopper(II) complex bridged both by oxamido and carboxylato groups, namely [Cu4 (dmaepox)2 (bpy)2 ](NO3 )2 ·2H2 O, where H3 dmaepox and bpy represent N-benzoato-N'- (3-methylaminopropyl)oxamide and 2,2'-bipyridine, was synthesized, and its structure reveals the presence of a centrosymmetric cyclic tetracopper(II) cation assembled by a pair of cis-dmaepox(3-) - bridged dicopper(II) units through the carboxylato groups, in which the endo- and exo-copper(II) ions bridged by the oxamido group have a square-planar and a square-pyramidal coordination geometries, respectively...
October 3, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28972678/antioxidant-anti-inflammatory-and-enzyme-inhibitory-activity-of-natural-plant-flavonoids-and-their-synthesized-derivatives
#16
Shivraj Hariram Nile, Young Soo Keum, Arti Shivraj Nile, Shivkumar S Jalde, Rahul V Patel
The synthesized flavonoid derivatives were examined for their antioxidant, anti-inflammatory, xanthine oxidase (XO), urease inhibitory activity, and cytotoxicity. Except few, all the flavonoids under this study showed significant antioxidant activity (45.6%-85.5%, 32.6%-70.6%, and 24.9%-65.5% inhibition by DPPH, ferric reducing/antioxidant power, and oxygen radical absorption capacity assays) with promising TNF-α inhibitory activity (42%-73% at 10 μM) and IL-6 inhibitory activity (54%-81% at 10 μM) compared with that of control dexamethasone...
October 3, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28960787/antioxidant-activities-of-novel-resveratrol-analogs-in-breast-cancer
#17
Anwesha Chatterjee, Amruta Ronghe, Subhash B Padhye, David A Spade, Nimee K Bhat, Hari K Bhat
The objective of the present study was to characterize the role of novel resveratrol (Res) analogs: 4-(E)-{(4-hydroxyphenylimino)-methylbenzene, 1, 2-diol} (HPIMBD) and 4-(E)-{(p-tolylimino)-methylbenzene-1,2-diol} (TIMBD) as potent antioxidants against breast cancer. Non-neoplastic breast epithelial cell lines MCF-10A and MCF-10F were treated with 17β-estradiol (E2), Res, HPIMBD, and TIMBD for up to 72 h. mRNA and protein levels of antioxidant genes, superoxide dismutase 3 (SOD3) and N-quinoneoxidoreductase-1 (NQO1) and transcription factors, nuclear factor erythroid 2-related factor (Nrf) 1, 2 and 3 were quantified after the above treatments...
September 28, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28960681/association-of-lp-pla2-g994t-gene-polymorphism-with-risk-of-ischemic-stroke-in-chinese-population
#18
Jing Ni, Hong Gu, Wuhao Hu, Fang Zhou, Xue Zhu, Ke Wang
The association between lipoprotein-associated phospholipase A2 (Lp-PLA2) G994T gene polymorphism and the risk of ischemic stroke is unclear. The aim of this study is to investigate the influence of Lp-PLA2 G994T genetic variant on the pathogenesis of ischemic stroke in Chinese population. A total of 348 patients with a clinical diagnosis of ischemic stroke and 260 gender-matched control subjects under physical examination were recruited from hospitals and genotyped for G994T gene polymorphism. The results showed that there was a significant difference in the genotype distribution between the two groups and people with GT or TT genotype were associated with the higher risk of ischemic stroke even after adjusting the effects of potential confounding factors...
September 28, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28960668/inhibitory-effects-of-some-drugs-on-carbonic-anhydrase-enzyme-purified-from-kangal-akkaraman-sheep-in-sivas-turkey
#19
Ümit M Koçyiğit, Sevgi Durna Daştan, Parham Taslimi, Taner Daştan, İlhami Gülçin
In this study, carbonic anhydrase (CA) enzyme was purified and characterized from blood samples of Kangal Akkaraman sheep and inhibitory properties on certain antibiotics were examined. CA purification was composed of preparation of the hemolysate and conducting the Sepharose-4B-tyrosine-sulfanilamide affinity gel chromatography in having specific activity of 11626 EU mg(-1) , yield of 14.40%, and 242.76-fold purification. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis was performed to assess the enzyme purity and a single band was observed...
September 28, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28960612/triggering-p53-activation-is-essential-in-ziyuglycoside-i-induced-human-retinoblastoma-weri-rb-1-cell-apoptosis
#20
Xue Zhu, Ke Wang, Yong Yao, Kai Zhang, Fanfan Zhou, Ling Zhu
Ziyuglycoside I (Ziyu I), one of the major components isolated from the root of Sanguisorba officinalis L., has been proved for the antitumor properties on oral cancer, prostate cancer, and colorectal cancer. However, the effect of Ziyu I on retinoblastoma (RB) is not well understood. In this study, we investigated the inhibitory effect and underlying molecular mechanism of Ziyu I on human RB WERI-Rb-1 cells. Our results indicated that Ziyu I could suppress cell viability and induce mitochondrial-dependent cell apoptosis in WERI-Rb-1 cells...
September 28, 2017: Journal of Biochemical and Molecular Toxicology
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