- Zinc pyrithione induces immobilization of human spermatozoa and suppresses the response of the cAMP/PKA signaling pathway. [Journal Article]
- EJEur J Pharm Sci 2019 Jul 02; 137:104984
- Zinc pyrithione (ZPT), a zinc coordination complex, is used as an antimicrobial agent. This study investigated the molecular mechanisms underlying ZPT-induced spermatozoa immobilization by examining …
Zinc pyrithione (ZPT), a zinc coordination complex, is used as an antimicrobial agent. This study investigated the molecular mechanisms underlying ZPT-induced spermatozoa immobilization by examining plasma membrane integrity, mitochondrial dysfunction, and the cAMP/PKA signaling pathway response. ZPT inhibited spermatozoa motility and movement patterns in a concentration-dependent manner. The 100% effective concentration (EC100) and median effective concentration (EC50) at which ZPT-induced spermatozoa immobilization at 20 s were 40 μmol/L and 16.19 μmol/L, respectively. ZPT did not significantly disrupt spermatozoa plasma membranes, but it exerted a strong and significant effect on the depolarization of mitochondria. In addition, ZPT exposure induced intracellular H+ accumulation and Ca2+ dissipation in spermatozoa, accompanied by suppression of the cAMP/PKA signaling pathway. Thus, ZPT induces spermatozoa immobilization without significant plasma membrane injury and so could be a candidate microbicidal spermicide.
- A Qualitative Study of the Contraceptive Effect on Women's Sexual Experiences: Beyond Hormonal Effects. [Journal Article]
- OGObstet Gynecol 2019; 134(1):91-101
- CONCLUSIONS: The range of contraceptive effects on women's sexual experiences shape their use and opinions of the product, leading to either increased motivation and consistent use or poor adherence and discontinuation. Awareness of these individualized experiences can help providers better understand and guide their patients towards successful contraceptive use.
- Consensus canadien sur la contraception (partie 3 de 4): chapitre 7 - Contraception intra-utérine. [Journal Article]
- JOJ Obstet Gynaecol Can 2019; 41 Suppl 1:S1-S23
- Fournir des lignes directrices aux fournisseurs de soins quant à l'utilisation de modes de contraception pour la prévention de la grossesse et quant à la promotion d'une sexualité saine.
Fournir des lignes directrices aux fournisseurs de soins quant à l'utilisation de modes de contraception pour la prévention de la grossesse et quant à la promotion d'une sexualité saine.
- Detergent-resistant domains in Spodoptera frugiperda midgut microvillar membranes and their relation to microapocrine secretion. [Journal Article]
- CBComp Biochem Physiol B Biochem Mol Biol 2019; 235:8-18
- The midgut from lepidopteran insects has a particular way to release proteins to the lumen, named microapocrine secretion that could be an adaptation to release secretory contents into the lumen at w…
The midgut from lepidopteran insects has a particular way to release proteins to the lumen, named microapocrine secretion that could be an adaptation to release secretory contents into the lumen at water absorbing regions. In this process small vesicles (microapocrine vesicles) bud from the midgut microvilli as double membrane vesicles, where the inner membrane comes from the secretion vesicle and the outer one from the microvillar membrane. The molecular machinery associated with this process may be recruited by specific midgut microvilli membrane domains. To address to this, Spodoptera frugiperda midgut microvillar membranes, prepared by magnesium treatment and free from cytoskeleton with the hyperosmotic Tris procedure, were submitted to detergent extraction and fractionated by density gradient ultracentrifugation. Detergent-resistant membrane domains (DRM) were recovered and their proteins identified by proteomics. Microapocrine vesicles were isolated by washing the luminal surface of the midgut epithelium, followed by freezing and thawing plus centrifugation to recover only membranes. Proteins from purified microvillar membranes and microapocrine vesicle membranes were identified by proteomics. Comparison of the two populations suggests that the budding of microapocrine vesicles surrounded by microvillar membrane is not a random process, because only around 50% of the microvillar membrane proteins are in the microapocrine vesicles. From the 16 proteins from DRM, 14 were enriched in the microapocrine membrane vesicles. These results suggest that on budding, the microapocrine vesicle membrane is enclosed by DRM and a surrounding area of the microvillar membrane. It is proposed that the DRMs somehow recruit the proteins composing the secretory machinery.
- Diallyl Trisulfide Enhances Benzo[a]pyrene-induced CYP1A1 Expression and Metabolic Activation in Hepatic HepG2 Cells. [Journal Article]
- ARAnticancer Res 2019; 39(5):2369-2375
- CONCLUSIONS: DATS combined treatment enhances BaP metabolic activation through an AHR-modulating mechanism.
- Increased Sulfiredoxin Expression in Gastric Cancer Cells May Be a Molecular Target of the Anticancer Component Diallyl Trisulfide. [Journal Article]
- BRBiomed Res Int 2019; 2019:4636804
- Sulfiredoxin (Srx) is a newly discovered antioxidant enzyme playing a role in the catalytic reduction of oxidative modifications. Srx is overexpressed in a variety of cancers. It may promote carcinog…
Sulfiredoxin (Srx) is a newly discovered antioxidant enzyme playing a role in the catalytic reduction of oxidative modifications. Srx is overexpressed in a variety of cancers. It may promote carcinogenesis as well as tumor progression. In this study, we report for the first time that Srx expression might be positively associated with the development of gastric cancer and tumor malignancy. Immunohistochemistry showed that, compared to normal tissues (42%, 20/47), Srx expression in gastric tumors (85%, 40/47) was much more common (chi-square test, p<0.01). In addition, the staining of Srx was stronger in poorly differentiated gastric cancer than in well-differentiated gastric cancer. Western blotting showed that, in the gastric tumor cell line BGC823, the Srx protein was upregulated in response to H2O2 treatment, although it was inadequate to counteract the increased oxidative stress, as indicated by the gradually increasing level of malondialdehyde (MDA). In addition, Srx expression, MDA levels, and ROS levels in BGC823 cells were markedly inhibited upon treatment with diallyl trisulfide (DATS), a major constituent of garlic oil with proven anticancer effects. These results suggest that Srx may be an oxidative stress marker. Antioxidation may account for the anticancer potential of garlic.
- [Effects of Diallyl Disulfide on the Proliferation and Apoptosis of Epithelial Ovarian Cancer Cells by Inducing G2/M Arrest]. [Journal Article]
- ZYZhongguo Yi Xue Ke Xue Yuan Xue Bao 2019 Feb 28; 41(1):43-52
- Objective To explore the effects of diallyl disulfide(DADS)-induced G2/M phase arrest on proliferation and apoptosis of ovarian cancer cells and its possible molecular mechanism.Methods DADS was used…
Objective To explore the effects of diallyl disulfide(DADS)-induced G2/M phase arrest on proliferation and apoptosis of ovarian cancer cells and its possible molecular mechanism.Methods DADS was used to incubate SK-OV-3 and OVCAR-3 cells,respectively,in different concentrations. Cell proliferation was measured by MTT assay and cell apoptosis rate was detected by flow cytometry assay. Xenograft model assay were performed to analyze the antitumor effect in vivo. Cell cycle phase distribution was detected by flow cytometry. Expressions of cell cycle G2/M phase as well as proliferation- and apoptosis-related proteins were measured by Western blotting.Results MTT assay showed that,after treatment of SK-OV-3(F=247.86,P=0.000)and OVCAR-3 cells(F=302.54,P=0.000)with different concentrations of DADS,the cell proliferation inhibition rate was significantly elevated with the increase of DADS concentrations in a concentration-dependent manner. The inhibition rate of SK-OV-3(F=335.12,P=0.000)and OVCAR-3 cells(F=347.43,P=0.000)at 24 h was significantly higher than that at 12 h and 48 h,showing a significant time-dependence manner. Flow cytometry showed that,after SK-OV-3 and OVCAR-3 cells were treated with different concentrations of DADS,the apoptosis rates increased significantly with the increase of DADS concentration in a concentration-dependent manner(P<0.05). The apoptotic rates of SK-OV-3 and OVCAR-3 cells treated with DADS at 24 h was significantly higher than that at 12 h and 48 h in a significant time-dependence manner(P<0.05). Compared with the blank treatment group,intraperitoneal injection of DADS solution significantly inhibited the xenograft volume of ovarian cancer cells in nude mice(F=548.23,P=0.000;F=311.84,P=0.000). After 30 mg/L of DADS was applied to SK-OV-3 and OVCAR-3 cells for 24 h,the percentage of cells in G2 phase of SK-OV-3 and OVCAR-3 cells increased significantly(F=375.11,P=0.000;F=256.48,P=0.000),compared with the blank cells. After 30 mg/L DADS was applied to SK-OV-3 and OVCAR-3 cells for 24 h,the expressions of p-Chk1(ser345)(F=108.89,P=0.013;F=97.58,P=0.018),p-CDC25C(ser216)(F=87.25,P=0.025;F=114.25,P=0.009),p-P53(ser15)(F=112.41,P=0.011;F=255.87,P=0.000),P21WAF1(F=246.38,P=0.001;F=141.36,P=0.005)and p-CDK1(Thr14/Tyr15)protein(F=298.12,P=0.000;F=233.15,P=0.000)were significantly increased,whereas the expressions of CDK1(F=308.24,P=0.000;F=257.55,P=0.000)and CyclinB1 protein(F=223.15,P=0.001;F=241.28,P=0.000)were significantly reduced.The expressions of proliferation and apoptosis-related proteins PCNA(F=77.36,P=0.031;F=157.28,P=0.001),Ki-67(F=205.64,P=0.007;F=315.22,P=0.000)and Survivin(F=122.13,P=0.013;F=188.24,P=0.000)were significantly decreased and Cleaved-caspase3 protein was significantly increased(F=86.46,P=0.023;F=99.11,P=0.009).Conclusion DADS can inhibit the proliferation of ovarian cancer cells and induce their apoptosis,which may be related to the activation of Chk1-CDC25C and P53-P21WAF1 signaling pathways in G2/M checkpoint,decreased kinase activity of CDK1,down-regulated expressions of CDK1 and CyclinB1 proteins,and ultimately cell cycle arrest at G2/M phase.
- Ex situ soil washing of highly contaminated silt loam soil using core-crosslinked amphiphilic polymer nanoparticles. [Journal Article]
- CChemosphere 2019; 224:212-219
- Non-ionic surfactants (Triton X-100 and Brij 30) and core-crosslinked amphiphilic polymer (CCAP) nanoparticles were used as extractants in the ex situ soil washing of silt loam soil contaminated with…
Non-ionic surfactants (Triton X-100 and Brij 30) and core-crosslinked amphiphilic polymer (CCAP) nanoparticles were used as extractants in the ex situ soil washing of silt loam soil contaminated with large quantities of petroleum oil, and their soil-washing performances were compared. Following washing with the surfactants, highly turbid aqueous solutions containing large numbers of soil and petroleum oil particles were produced. In contrast, the CCAP nanoparticles successfully extracted the petroleum oils from the soil samples without the formation of such a turbid aqueous solution. In addition, the CCAP nanoparticles extracted 96% of the petroleum oils, which is a significantly larger quantity than that by Brij 30 and Triton X-100 under equivalent conditions. Indeed, owing to their crosslinked micelle-like structure, the CCAP nanoparticles maintained their nanostructure even upon contact with a highly contaminated silt loam soil matrix, thereby resulting in the extraction of only the hydrophobic oily contaminants from the soil matrix and avoiding the formation of dispersions of soil particles and hydrophobic contaminants. As such, CCAP nanoparticles could be considered as suitable washing materials for highly contaminated silt loam soils.
- Whole organ sheep kidney tissue engineering and in vivo transplantation: Effects of perfusion-based decellularization on vascular integrity. [Journal Article]
- MSMater Sci Eng C Mater Biol Appl 2019; 98:392-400
- CONCLUSIONS: This study demonstrated the efficacy of well-preserved acellular scaffold and vasculature network in post renal transplant outcome in a sheep model. These results have potential to pave the road for further investigations in acellular whole organ transplantation.
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- Antiarthritic Activity of Diallyl Disulfide against Freund's Adjuvant-Induced Arthritic Rat Model. [Journal Article]
- JEJ Environ Pathol Toxicol Oncol 2018; 37(4):291-303
- Diallyl disulfide (DADS) is an organosulfur compound derived mainly from garlic and genus Allium plants, which possess diverse biological properties. The aim of the present study was to evaluate the …
Diallyl disulfide (DADS) is an organosulfur compound derived mainly from garlic and genus Allium plants, which possess diverse biological properties. The aim of the present study was to evaluate the antiarthritic activity of DADS in rats with arthritis induced using complete Freund's adjuvant (CFA). DADS (20 mg/kg and 50 mg/kg) was administered and tested against CFA-induced arthritic rats by assessing various parameters: body weight, paw volume, arthritic score, organ indices (spleen and thymus), hematological and biochemical parameters, and proinflammatory cytokines. Histopathological analyses were also performed. The treatment of rats with DADS provoked significant reductions in paw volume, edema formation, arthritic score, and organ indices, together with significant improvement in body weight. DADS treatment also improved joint destruction and reduced inflammation, which was supported by histopathological studies. DADS significantly reduced the white blood cell count and improved red blood cell count in CFA-induced rats. The anti-arthritic activity in the CFA-induced rats was further confirmed by biochemical analysis. These findings suggest that DADS prevented cartilage destruction, improved health status, and reduced inflammation by decreasing the expression of proinflammatory cytokines in arthritis-induced rats. Hence, DADS may be a potential therapeutic candidate for the treatment of rheumatoid arthritis.