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https://www.readbyqxmd.com/read/28328069/autophagy-maintains-the-integrity-of-endothelial-barrier-in-lps-induced-lung-injury
#1
Dan Zhang, Jian Zhou, Le Chi Ye, Jing Li, Zhenzhou Wu, Yuping Li, Chichi Li
Understanding the role and underlying regulation mechanism of autophagy in lipopolysaccharide-induced lung injury (LPS-LI) may provide potentially new pharmacological targets for treatment of acute lung injury. The aim of this study was to investigate the functional significance of autophagy in LPS-LI. The autophagy of human pulmonary microvascular endothelial cells (HPMVECs) and mice was inhibited before they were challenged with LPS. In vitro, permeability, vitality and the lactate dehydrogenase (LDH) release rate of the cells were detected, the zonula occluden-1 (ZO-1) expression and the stress fiber formation were determined...
March 22, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28325318/preparation-and-characterization-of-amine-functional-nano-hydroxyapatite-chitosan-bionanocomposite-for-bone-tissue-engineering-applications
#2
Besir Hakan Atak, Berna Buyuk, Merve Huysal, Sevim Isik, Mehmet Senel, Wolfgang Metzger, Guven Cetin
In this study, three different types of scaffolds including a uniquely modified composite scaffold - namely chitosan (CTS), nano-hydroxyapatite/chitosan composite (CTS+nHAP), and amine group (NH2) modified nano-hydroxyapatite/chitosan composite (CTS+nHAP-NH2) scaffolds - were synthesized for bone tissue engineering (BTE) purposes. As results of the study, it was found that all scaffold types were biodegradable with CTS and CTS+nHAP scaffolds losing up to 15% of their initial weight, while the CTS+nHAP-NH2 scaffold showing 10% of weight loss after six weeks of lysozyme treatment...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28323920/perinatal-exposure-to-low-dose-bisphenol-a-bpa-disrupts-the-structural-and-functional-development-of-the-hypothalamic-feeding-circuitry
#3
Harry MacKay, Zachary R Patterson, Alfonso Abizaid
Bisphenol-A (BPA) is a component of polycarbonate and other plastics to which humans are regularly exposed at low levels. BPA is characterized as an endocrine disruptor due to observations of its estrogenic activity in various experimental models. We have previously shown evidence of disrupted hypothalamic feeding circuitry and leptin sensitivity in adult BPA-exposed animals subject to a high-fat diet, but because these animals were already exhibiting a diet-induced obese phenotype, we could not rule out the possibility that these observations were simply consequences of the obesity, not a pre-existing phenotype produced by BPA exposure...
February 7, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323106/implications-of-epigallocatechin-3-gallate-in-cultured-human-sertoli-cells-glycolytic-and-oxidative-profile
#4
Tânia R Dias, Marco G Alves, Joaquina Silva, Alberto Barros, Mário Sousa, Susana Casal, Branca M Silva, Pedro F Oliveira
Sertoli cells are crucial for the success of spermatogenesis, which is the biological process that ensures male fertility. These cells present high metabolic rates, being often subjected to high oxidative stress levels that, if uncontrolled, may compromise male fertility. Since the most abundant tea catechin, epigallocatechin-3-gallate (EGCG), has demonstrated a potent preventive activity against oxidative stress, we have evaluated its effect at concentrations of 5 and 50μM, on the metabolism, mitochondrial functionality and oxidative profile of human Sertoli cells (hSCs)...
March 17, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28323050/antiplasmodial-activity-of-mezoneuron-benthamianum-leaves-and-identification-of-its-active-constituents
#5
Olivia Jansen, Alembert T Tchinda, Jean Loua, Virginie Esters, Ewa Cieckiewicz, Allison Ledoux, Paul D Toukam, Luc Angenot, Monique Tits, Aliou M Balde, Michel Frédérich
ETHNOPHARMACOLOGICAL RELEVANCE: Decoctions of the leaves of M. benthamianum Baill. are used by traditional healers in Guinea to treat malaria and this use was validated by a preliminary clinical assay. AIM OF THE STUDY: To evaluate the in vitro antiplasmodial activity and to identify active compounds from extracts of M. benthamianum leaves. MATERIAL AND METHODS: Antiplasmodial activity of extracts, fractions and pure compounds was evaluated in vitro against a chloroquine-sensitive strain of Plasmodium falciparum (3D7) using the measurement of the plasmodial lactate dehydrogenase activity...
March 17, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28319810/inhibitors-of-glut-slc2a-enhance-the-action-of-bcnu-and-temozolomide-against-high-grade-gliomas
#6
Alberto Azzalin, Giulia Nato, Elena Parmigiani, Francesca Garello, Annalisa Buffo, Lorenzo Magrassi
Glucose transport across glioblastoma membranes plays a crucial role in maintaining the enhanced glycolysis typical of high-grade gliomas and glioblastoma. We tested the ability of two inhibitors of the glucose transporters GLUT/SLC2A superfamily, indinavir (IDV) and ritonavir (RTV), and of one inhibitor of the Na/glucose antiporter type 2 (SGLT2/SLC5A2) superfamily, phlorizin (PHZ), in decreasing glucose consumption and cell proliferation of human and murine glioblastoma cells. We found in vitro that RTV, active on at least three different GLUT/SLC2A transporters, was more effective than IDV, a specific inhibitor of GLUT4/SLC2A4, both in decreasing glucose consumption and lactate production and in inhibiting growth of U87MG and Hu197 human glioblastoma cell lines and primary cultures of human glioblastoma...
March 17, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28317895/upregulation-of-skeletal-muscle-pgc-1%C3%AE-through-the-elevation-of-cyclic-amp-levels-by-cyanidin-3-glucoside-enhances-exercise-performance
#7
Toshiya Matsukawa, Hideko Motojima, Yuki Sato, Shinya Takahashi, Myra O Villareal, Hiroko Isoda
Regular exercise and physical training enhance physiological capacity and improve metabolic diseases. Skeletal muscles require peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) in the process of their adaptation to exercise owing to PGC-1α's ability to regulate mitochondrial biogenesis, angiogenesis, and oxidative metabolism. Cyanidin-3-glucoside (Cy3G) is a natural polyphenol and a nutraceutical factor, which has several beneficial effects on human health. Here, the effect of Cy3G on exercise performance and the underlying mechanisms involved were investigated...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315323/increased-serotonin-signaling-contributes-to-the-warburg-effect-in-pancreatic-tumor-cells-under-metabolic-stress-and-promotes-growth-of-pancreatic-tumors-in-mice
#8
Shu-Heng Jiang, Jun Li, Fang-Yuan Dong, Jian-Yu Yang, De-Jun Liu, Xiao-Mei Yang, Ya-Hui Wang, Min-Wei Yang, Xue-Liang Fu, Xiao-Xin Zhang, Qing Li, Xiu-Feng Pang, Yan-Miao Huo, Jiao Li, Jun-Feng Zhang, Ho-Young Lee, Su-Jae Lee, Wen-Xin Qin, Jian-Ren Gu, Yong-Wei Sun, Zhi-Gang Zhang
BACKGROUND & AIMS: The desmoplasia and poor vascularity cause severe metabolic stress in pancreatic ductal adenocarcinomas (PDACs). Serotonin (5-HT) is a neuromodulator with neurotransmitter and neuroendocrine functions that contributes to tumorigenesis. We investigated the role of 5-HT signaling in the growth of pancreatic tumors. METHODS: We measured the levels of proteins that regulate 5-HT synthesis, packaging, and degradation in pancreata from Kras(G12D/+); Trp53(R172H/+); Pdx1-Cre; (KPC) mice, which develop pancreatic tumors, as well as in PDAC cell lines and a tissue microarray containing 81 human PDAC samples...
March 14, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28315049/antihypertensive-effects-of-probiotics
#9
REVIEW
Iñaki Robles-Vera, Marta Toral, Miguel Romero, Rosario Jiménez, Manuel Sánchez, Francisco Pérez-Vizcaíno, Juan Duarte
PURPOSE OF REVIEW: The present review focuses in the hypertension-associated changes in the microbiota and the current insights regarding the impact of probiotics on blood pressure in animal models and in human hypertensive patients. RECENT FINDINGS: Gut dysbiosis in hypertension is characterized by (i) the gut microbioma that is less diverse and less rich with an increased Firmicutes/Bacteroidetes ratio and (ii) a decrease in acetate- and butyrate-producing bacteria and an increase in lactate-producing bacterial populations...
April 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28314283/stable-shrna-silencing-of-lactate-dehydrogenase-a-ldha-in-human-mda-mb-231-breast-cancer-cells-fails-to-alter-lactic-acid-production-glycolytic-activity-atp-or-survival
#10
Nzinga Mack, Elizabeth A Mazzio, David Bauer, Hernan Flores-Rozas, Karam F A Soliman
BACKGROUND: In the US, African Americans have a high death rate from triple-negative breast cancer (TNBC), characterized by lack of hormone receptors (ER, PR, HER2/ERRB2) which are otherwise valuable targets of chemotherapy. There is a need to identify novel targets that negatively impact TNBC tumorigenesis. TNBCs release an abundance of lactic acid, under normoxic, hypoxic and hyperoxic conditions; this referred to as the Warburg effect. Accumulated lactic acid sustains peri-cellular acidity which propels metastatic invasion and malignant aggressive transformation...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28306342/nmr-based-plasma-metabolomic-discrimination-for-male-fertility-assessment-of-rats-treated-with-eurycoma-longifolia-extracts
#11
Forough Ebrahimi, Baharudin Ibrahim, Chin-Hoe Teh, Vikneswaran Murugaiyah, Kit-Lam Chan
Male infertility is one of the leading causes of infertility which affects many couples worldwide. Semen analysis is a routine examination of male fertility status which is usually performed on semen samples obtained through masturbation that may be inconvenient to patients. Eurycoma longifolia (Tongkat Ali, TA), native to Malaysia, has been traditionally used as a remedy to boost male fertility. In our recent studies in rats, upon the administration of high-quassinoid content extracts of TA including TA water (TAW), quassinoid-rich TA (TAQR) extracts, and a low-quassinoid content extract including quassinoid-poor TA (TAQP) extract, sperm count (SC) increased in TAW- and TAQR-treated rats when compared to the TAQP-treated and control groups...
March 17, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28301837/breast-milk-polyamines-and-microbiota-interactions-impact-of-mode-of-delivery-and-geographical-location
#12
Carlos Gómez-Gallego, Himanshu Kumar, Izaskun García-Mantrana, Elloise du Toit, Jukka-Pekka Suomela, Kaisa M Linderborg, Yumei Zhang, Erika Isolauri, Baoru Yang, Seppo Salminen, M Carmen Collado
BACKGROUND/AIMS: The aim of the present study was to identify and quantify the polyamine levels in human milk obtained from different countries and through different modes of delivery, and to investigate their association with breast milk microbes. METHODS: Mature breast milk samples were obtained from 78 healthy mothers after 1 month of lactation from 4 different geographical locations: Finland, Spain (Europe); South Africa (Africa); and China (Asia). Polyamines were determined using HPLC after dansyl derivatization and milk microbiota was obtained by 16S rRNA gene sequencing...
March 17, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28300420/a-new-lc-ms-ms-bioanalytical-method-for-atenolol-in-human-plasma-and-milk
#13
Ei Mon Phyo Lwin, Cobus Gerber, Yunmei Song, Catherine Leggett, Usha Ritchie, Sean Turner, Sanjay Garg
AIM: A new sensitive LC-MS/MS method for the quantification of atenolol in human plasma and milk has been developed for clinical lactation studies. METHODS & RESULTS: Atenolol and the internal standard, phenazone, were extracted from biological matrices by protein precipitation. A Phenomenex(®) C-18 column and gradient chromatographic conditions were used for separation of the analyte, followed by detection with MS. Stability of samples was confirmed for atenolol in human plasma and milk for up to 3 months...
March 16, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28298279/the-potential-impact-of-animal-science-research-on-global-maternal-and-child-nutrition-and-health-a-landscape-review
#14
REVIEW
Jack Odle, Sheila K Jacobi, R Dean Boyd, Dale E Bauman, Russell V Anthony, Fuller W Bazer, Adam L Lock, Andrew C Serazin
High among the challenges facing mankind as the world population rapidly expands toward 9 billion people by 2050 is the technological development and implementation of sustainable agriculture and food systems to supply abundant and wholesome nutrition. In many low-income societies, women and children are the most vulnerable to food insecurity, and it is unequivocal that quality nutrition during the first 1000 d of life postconception can be transformative in establishing a robust, lifelong developmental trajectory...
March 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28295755/evidence-for-a-functional-vasoconstrictor-role-for-atp-in-the-human-cutaneous-microvasculature
#15
James A Lang, Alex C Krajek, Kevin A Smaller
Noradrenaline is responsible for eliciting ∼60% of the reflex cutaneous vasoconstriction (VC) response in young adults, whereas the remainder is due to one or more unidentified coreleased sympathetic adrenergic neurotransmitter(s). Inconsistent evidence has placed neuropeptide Y in this role; however, other putative cotransmitters have yet to be tested. We hypothesize that ATP contributes to the reflex cutaneous VC response. Two protocols were conducted in young adults (n = 10); both involved the placement of three microdialysis (MD) probes in forearm skin and whole-body cooling (Tsk  = 30...
March 10, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28294281/mice-exposed-to-infant-formula-enriched-with-polyamines-impact-on-host-transcriptome-and-microbiome
#16
Carlos Gómez-Gallego, María García Romo, Rafael Frías, María Jesús Periago, Gaspar Ros, Seppo Salminen, Maria C Collado
Previous studies using a BALB/cOlaHsd model have shown the impact that the supplementation of infant formula with polyamines has on the modulation of microbial colonization and immune system development. To contribute to deciphering and identifying new complex interactions underlying the host response to polyamines, a systems biology approach integrating data from microbiota along the gastrointestinal tract, lymphocyte populations and immune system gene expression analysis of a lactating mice model fed different diets was carried out...
March 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28290293/comparative-proteomic-analysis-of-milk-derived-exosomes-in-human-and-bovine-colostrum-and-mature-milk-samples-by-itraq-coupled-lc-ms-ms
#17
Mei Yang, Dahe Song, Xueyan Cao, Rina Wu, Biao Liu, Wenhui Ye, Junrui Wu, Xiqing Yue
Exosomes are membranous vesicles found in biological fluids with important functions. However, milk-derived exosome proteins from humans and bovines have not been studied in detail. The advanced iTRAQ proteomic approach was used to analyze milk-derived exosomes in human and bovine colostrum and mature milk samples. A total of 920 milk exosome proteins were identified and quantified. Among these, 575 differentially expressed exosome proteins (P<0.05) were found. Multivariate analysis, gene ontology (GO) annotation and the KEGG pathway were used to interpret the identified proteins...
February 2017: Food Research International
https://www.readbyqxmd.com/read/28289786/metabolic-determinants-in-listeria-monocytogenes-anaerobic-listeriolysin-o-production
#18
Nathan Wallace, Eric Newton, Elizabeth Abrams, Ashley Zani, Yvonne Sun
Listeria monocytogenes is a human pathogen and a facultative anaerobe. To better understand how anaerobic growth affects L. monocytogenes pathogenesis, we first showed that anaerobic growth led to decreased growth and changes in surface morphology. Moreover, compared to aerobically grown bacteria, anaerobically grown L. monocytogenes established higher level of invasion but decreased intracellular growth and actin polymerization in cultured cells. The production of listeriolysin O (LLO) was significantly lower in anaerobic cultures-a phenotype observed in wild type and isogenic mutants lacking transcriptional regulators SigB or CodY or harboring a constitutively active PrfA...
March 13, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28289592/associations-of-biochemical-changes-and-maternal-traits-with-mutation-1843-c-t-in-the-ryr1-gene-as-a-common-cause-for-porcine-stress-syndrome
#19
Z T Popovski, B Tanaskovska, E Miskoska-Milevska, S Andonov, S Domazetovska
Stress syndrome is usually caused by a mutation in the ryanodine receptor gene (ryr1) and it is widely studied in humans and swine populations. The protein product of this gene plays a crucial role in the regulation of calcium transport in muscle cells. A G>T mutation in the human ryr1 gene, which results in the replacement of a conserved arginine at position 614 where a leucine occurs at the same position as the previously identified Arg→Cys mutation reported in all cases of porcine stress syndrome (PSS)...
December 1, 2016: Balkan Journal of Medical Genetics: BJMG
https://www.readbyqxmd.com/read/28289572/human-listeriosis-presenting-as-breast-abscess-report-of-a-rare-case
#20
Venkataramana Kandi
An abscess is defined as a collection of pus in various tissues of the body including skin and other organs. Abscesses most commonly are formed on the skin under the armpits, groin areas, and rectal areas. Most abscesses involve microbial infections with few remaining sterile. The treatment of abscesses includes both medical and surgical intervention. In the era of multidrug resistance, isolation and identification of the causative microbe and testing for antimicrobial susceptible patterns assume greater significance for the better management of patients, thereby reducing the resultant morbidity and mortality...
February 1, 2017: Curēus
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