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https://www.readbyqxmd.com/read/28431025/1h-magnetic-resonance-spectroscopy-of-live-human-sperm
#1
S Reynolds, S J Calvert, M N Paley, A A Pacey
STUDY QUESTION: Can 1H Magnetic Resonance Spectroscopy (MRS) be used to obtain information about the molecules and metabolites in live human spermatozoa? SUMMARY ANSWER: Percoll-based density gradient centrifugation (DGC) followed by a further two washing steps, yielded enough sperm with minimal contamination (<0.01%) from seminal fluid to permit effective MRS which detected significant differences (p < 0.05) in the choline/glycerophosphocholine, lipid and lactate regions of the 1H MRS spectrum between sperm in the pellet and those from the 40/80% interface...
April 18, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28430646/immunotherapeutic-target-expression-on-breast-tumors-can-be-amplified-by-hormone-receptor-antagonism-a-novel-strategy-for-enhancing-efficacy-of-targeted-immunotherapy
#2
Ritika Jaini, Matthew G Loya, Charis Eng
Immunotherapy has historically been successful in highly antigenic tumors but has shown limited therapeutic efficacy in non-antigenic tumors such as breast cancers. Our previous studies in autoimmunity have demonstrated that increased antigen load within a tissue enhances immune reactivity against it. We therefore hypothesized that enhancing expression of target proteins on breast tumors can increase efficacy of targeted immunotherapy. We hypothesized that antagonism of the estrogen receptor (ER) can increase expression of targets that are hormonally regulated and facilitate enhanced tumor recognition by targeted immunotherapy...
March 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28430298/an-experimental-numerical-investigation-on-the-effects-of-macroporous-scaffold-geometry-on-cell-culture-parameters
#3
Hadis Eghbali, Michele M Nava, Gabriella Leonardi, Davod Mohebbi-Kalhori, Roberto Sebastiano, Abdolreza Samimi, Manuela T Raimondi
INTRODUCTION: Perfused bioreactors have been demonstrated to be effective in the delivery of nutrients and in the removal of waste products to and from the interior of cell-populated three-dimensional scaffolds. In this paper, a perfused bioreactor hosting a macroporous scaffold provided with a channel is used to investigate transport phenomena and culture parameters on cell growth. METHODS: MG63 human osteosarcoma cells were seeded on macroporous poly​(ε-caprolactone) scaffolds provided with a channel...
April 13, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28429368/-aralar-agc1-deficiency-a-neurodevelopmental-disorder-with-severe-impairment-of-neuronal-mitochondrial-respiration-does-not-produce-a-primary-increase-in-brain-lactate
#4
Inés Juaristi, María L García-Martin, Tiago B Rodrigues, Jorgina Satrústegui, Irene Llorente-Folch, Beatriz Pardo
ARALAR/AGC1 (aspartate-glutamate mitochondrial carrier 1) is an important component of the NADH malate-aspartate shuttle (MAS). AGC1-deficiency is a rare disease causing global cerebral hypomyelination, developmental arrest, hypotonia, and epilepsy (OMIM ID #612949); the aralar-KO mouse recapitulates the major findings in humans. This study was aimed at understanding the impact of ARALAR-deficiency in brain lactate levels as a biomarker. We report that lactate was equally abundant in wild-type and aralar-KO mouse brain in vivo at PND 17...
April 21, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28428423/fructose-driven-glycolysis-supports-anoxia-resistance-in-the-naked-mole-rat
#5
Thomas J Park, Jane Reznick, Bethany L Peterson, Gregory Blass, Damir Omerbašić, Nigel C Bennett, P Henning J L Kuich, Christin Zasada, Brigitte M Browe, Wiebke Hamann, Daniel T Applegate, Michael H Radke, Tetiana Kosten, Heike Lutermann, Victoria Gavaghan, Ole Eigenbrod, Valérie Bégay, Vince G Amoroso, Vidya Govind, Richard D Minshall, Ewan St J Smith, John Larson, Michael Gotthardt, Stefan Kempa, Gary R Lewin
The African naked mole-rat's (Heterocephalus glaber) social and subterranean lifestyle generates a hypoxic niche. Under experimental conditions, naked mole-rats tolerate hours of extreme hypoxia and survive 18 minutes of total oxygen deprivation (anoxia) without apparent injury. During anoxia, the naked mole-rat switches to anaerobic metabolism fueled by fructose, which is actively accumulated and metabolized to lactate in the brain. Global expression of the GLUT5 fructose transporter and high levels of ketohexokinase were identified as molecular signatures of fructose metabolism...
April 21, 2017: Science
https://www.readbyqxmd.com/read/28427009/early-in-life-dietary-zinc-deficiency-and-supplementation-and-mammary-tumor-development-in-adulthood-female-rats
#6
Flávia R M da Silva, Tony F Grassi, Joyce R Zapaterini, Lucas T Bidinotto, Luis F Barbisan
Zinc deficiency during pregnancy and postnatal life can adversely increase risk of developing human diseases at adulthood. The present study was designed to evaluate whether dietary zinc deficiency or supplementation during the pregnancy, lactation and juvenile stages interferes in the development of mammary tumors induced by 7,12-dimethylbenzanthracene (DMBA) in female Sprague-Dawley (SD) rats. Pregnant female SD rats were allocated into three groups: zinc-adequate diet (ZnA - 35-mg/kg chow), zinc-deficient diet (ZnD - 3-mg/kg chow) or zinc-supplemented diet (ZnS - 180-mg/kg chow) during gestational day 10 (GD 10) until the litters' weaning...
April 1, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28426994/silica-nanoparticles-induced-intrinsic-apoptosis-in-neuroblastoma-sh-sy5y-cells-via-cytc-apaf-1-pathway
#7
Yanyan Yang, Yongbo Yu, Jiahui Wang, Yanbo Li, Yang Li, Jia Wei, Tong Zheng, Minghua Jin, Zhiwei Sun
The present study was to investigate effects of Silica nanoparticles (SiNPs) on nervous system and explore potential mechanisms in human neuroblastoma cells (SH-SY5Y). Cytotoxicity was detected by cell viability and Lactate dehydrogenase (LDH) release. Flow cytometry analysis was applied to assess mitochondrial membrane potential (MMP) loss, intracellular Ca(2+) and apoptosis. To clarify the mechanism of SiNPs-induced apoptosis, intrinsic apoptosis-related proteins were detected. Our results showed that SiNPs caused cytotoxicity, cell membrane damage and Ca(2+) increase in a dose-dependent manner in SH-SY5Y cells...
January 30, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28426747/metabolic-analysis-of-radioresistant-medulloblastoma-stem-like-clones-and-potential-therapeutic-targets
#8
Lue Sun, Takashi Moritake, Kazuya Ito, Yoshitaka Matsumoto, Hironobu Yasui, Hidehiko Nakagawa, Aki Hirayama, Osamu Inanami, Koji Tsuboi
Medulloblastoma is a fatal brain tumor in children, primarily due to the presence of treatment-resistant medulloblastoma stem cells. The energy metabolic pathway is a potential target of cancer therapy because it is often different between cancer cells and normal cells. However, the metabolic properties of medulloblastoma stem cells, and whether specific metabolic pathways are essential for sustaining their stem cell-like phenotype and radioresistance, remain unclear. We have established radioresistant medulloblastoma stem-like clones (rMSLCs) by irradiation of the human medulloblastoma cell line ONS-76...
2017: PloS One
https://www.readbyqxmd.com/read/28425205/engineering-the-xylose-catabolizing-dahms-pathway-for-production-of-poly-d-lactate-co-glycolate-and-poly-d-lactate-co-glycolate-co-d-2-hydroxybutyrate-in-escherichia-coli
#9
So Young Choi, Won Jun Kim, Seung Jung Yu, Si Jae Park, Sung Gap Im, Sang Yup Lee
Poly(lactate-co-glycolate), PLGA, is a representative synthetic biopolymer widely used in medical applications. Recently, we reported one-step direct fermentative production of PLGA and its copolymers by metabolically engineered Escherichia coli from xylose and glucose. In this study, we report development of metabolically engineered E. coli strains for the production of PLGA and poly(d-lactate-co-glycolate-co-d-2-hydroxybutyrate) having various monomer compositions from xylose as a sole carbon source. To achieve this, the metabolic flux towards Dahms pathway was modulated using five different synthetic promoters for the expression of Caulobacter crescentus XylBC...
April 19, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28424755/rapid-low-cost-prototyping-of-transdermal-devices-for-personal-healthcare-monitoring
#10
Sanjiv Sharma, Anwer Saeed, Christopher Johnson, Nikolaj Gadegaard, Anthony Eg Cass
The next generation of devices for personal healthcare monitoring will comprise molecular sensors to monitor analytes of interest in the skin compartment. Transdermal devices based on microneedles offer an excellent opportunity to explore the dynamics of molecular markers in the interstitial fluid, however good acceptability of these next generation devices will require several technical problems associated with current commercially available wearable sensors to be overcome. These particularly include reliability, comfort and cost...
April 2017: Sensing and Bio-Sensing Research
https://www.readbyqxmd.com/read/28421385/in-vitro-and-in-vivo-anti-tumor-effects-of-selected-platinum-iv-and-dinuclear-platinum-ii-complexes-against-lung-cancer-cells
#11
Milos Arsenijevic, Marija Milovanovic, Snezana Jovanovic, Natalija Arsenijevic, Bojana Simovic Markovic, Marina Gazdic, Vladislav Volarevic
In the present study, cytotoxic effects of cisplatin, the most usually used chemotherapeutic agent, were compared with new designed platinum(IV) ([PtCl4(en)] (en = ethylenediamine) and [PtCl4(dach)]) (dach = (±)-trans-1,2-diaminocyclohexane) and platinum(II) complexes ([{trans-Pt(NH3)2Cl}2(μ-pyrazine)](ClO4)2 (Pt1), [{trans-Pt(NH3)2Cl}2(μ-4,4'-bipyridyl)](ClO4)2DMF(Pt2),[{trans-Pt(NH3)2Cl}2(μ-1,2-bis(4pyridyl)ethane)](ClO4)2 (Pt3)), in vitro and in vivo against human and murine lung cancer cells, to determine anti-tumor potential of newly synthesized platinum-based drugs in the therapy of lung cancer...
April 18, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28421296/metabolite-signatures-of-doxorubicin-induced-toxicity-in-human-induced-pluripotent-stem-cell-derived-cardiomyocytes
#12
Umesh Chaudhari, James K Ellis, Vilas Wagh, Harshal Nemade, Jürgen Hescheler, Hector C Keun, Agapios Sachinidis
Drug-induced off-target cardiotoxicity, particularly following anti-cancer therapy, is a major concern in new drug discovery and development. To ensure patient safety and efficient pharmaceutical drug development, there is an urgent need to develop more predictive cell model systems and distinct toxicity signatures. In this study, we applied our previously proposed repeated exposure toxicity methodology and performed (1)H NMR spectroscopy-based extracellular metabolic profiling in culture medium of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) exposed to doxorubicin (DOX), an anti-cancer agent...
April 18, 2017: Amino Acids
https://www.readbyqxmd.com/read/28421181/mct1-in-invasive-ductal-carcinoma-monocarboxylate-metabolism-and-aggressive-breast-cancer
#13
Jennifer M Johnson, Paolo Cotzia, Roberto Fratamico, Lekha Mikkilineni, Jason Chen, Daniele Colombo, Mehri Mollaee, Diana Whitaker-Menezes, Marina Domingo-Vidal, Zhao Lin, Tingting Zhan, Madalina Tuluc, Juan Palazzo, Ruth C Birbe, Ubaldo E Martinez-Outschoorn
Introduction: Monocarboxylate transporter 1 (MCT1) is an importer of monocarboxylates such as lactate and pyruvate and a marker of mitochondrial metabolism. MCT1 is highly expressed in a subgroup of cancer cells to allow for catabolite uptake from the tumor microenvironment to support mitochondrial metabolism. We studied the protein expression of MCT1 in a broad group of breast invasive ductal carcinoma specimens to determine its association with breast cancer subtypes and outcomes. Methods: MCT1 expression was evaluated by immunohistochemistry on tissue micro-arrays (TMA) obtained through our tumor bank...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28419250/enhanced-glycolysis-regulated-by-hif-1%C3%AE-via-mct-4-promotes-inflammation-in-arsenite-induced-carcinogenesis
#14
Fei Luo, Zhonglan Zou, Xinlu Liu, Min Ling, Qingling Wang, Qi Wang, Lu Lu, Le Shi, Yonglian Liu, Qizhan Liu, Aihua Zhang
Arsenite is well established as a human carcinogen, but the molecular mechanisms leading to arsenite-induced carcinogenesis are complex and elusive. Accelerated glycolysis, a common process in tumor cells called the Warburg effect, is associated with various biological phenomena. However, the role of glycolysis induced by arsenite is unknown. We have found that, with chronic exposure to arsenite, L-02 cells undergo a metabolic shift to glycolysis. In liver cells exposed to arsenite, hypoxia inducible factor-1α (HIF-1α) and monocarboxylate transporter-4 (MCT-4) are over-expressed...
April 17, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28419061/functional-status-of-neonatal-and-pediatric-patients-after-extracorporeal-membrane-oxygenation
#15
Katherine Cashen, Ron Reeder, Heidi J Dalton, Robert A Berg, Thomas P Shanley, Christopher J L Newth, Murray M Pollack, David Wessel, Joseph Carcillo, Rick Harrison, J Michael Dean, Tammara Jenkins, Kathleen L Meert
OBJECTIVES: To describe functional status at hospital discharge for neonatal and pediatric patients treated with extracorporeal membrane oxygenation, and identify factors associated with functional status and mortality. DESIGN: Secondary analysis of observational data collected by the Collaborative Pediatric Critical Care Research Network between December 2012 and September 2014. SETTING: Eight hospitals affiliated with the Collaborative Pediatric Critical Care Research Network...
April 17, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28418808/effects-of-maternal-supplementation-with-omega-3-precursors-on-human-milk-composition
#16
Evelyne Mazurier, Virginie Rigourd, Paul Perez, Rachel Buffin, Leslie Couedelo, Carole Vaysse, Wafae Belcadi, Rémi Sitta, Fabienne Nacka, Delphine Lamireau, Gilles Cambonie, Jean-Charles Picaud, Claude Billeaud
BACKGROUND: Long-chain polyunsaturated fatty acids (LC-PUFAs) are important for newborn neurosensory development. Supplementation of breastfeeding mothers' diets with omega-3 PUFAs, such as alpha-linolenic acid (ALA), may increase their concentration in human milk. Research aim: This study aimed to assess human milk composition after 15-day supplementation regimens containing either omega-3 PUFAs or olive oil, which does not provide ALA. METHODS: A multicenter factorial randomized trial was conducted with four groups of breastfeeding women, with each group containing 19 to 22 women...
May 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28418802/transfer-of-low-dose-aspirin-into-human-milk
#17
Palika Datta, Kathleen Rewers-Felkins, Raja Reddy Kallem, Teresa Baker, Thomas W Hale
BACKGROUND: Aspirin has antipyretic and anti-inflammatory properties and is frequently used by pregnant and lactating women. However, its transfer in human milk when administered at low dose has not been reported. Research aim: This study aimed to evaluate the transfer of acetylsalicylic acid and its metabolite, salicylic acid, into human milk following the use of low dose aspirin. METHODS: In this study, milk samples were collected at 0, 1, 2, 4, 8, 12, and 24 hours from seven breastfeeding women after a steady-state daily dose of 81 mg of aspirin...
May 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28416501/protocol-for-a-placebo-controlled-within-participants-crossover-trial-evaluating-the-efficacy-of-intranasal-oxytocin-to-improve-pain-and-function-among-women-with-chronic-pelvic-musculoskeletal-pain
#18
Joshua A Rash, Kirsti Toivonen, Magali Robert, Maryam Nasr-Esfahani, John F Jarrell, Tavis S Campbell
INTRODUCTION: This protocol presents the rationale and design for a trial evaluating the efficacy of intranasal oxytocin in improving pain and function among women with chronic pelvic musculoskeletal pain. Oxytocin is a neuropeptide traditionally recognised for involvement in labour, delivery and lactation. Novel evidence suggests that oxytocin decreases pain sensitivity in humans. While oxytocin administration has been reported to lower pain sensitivity among patients experiencing chronic back pain, headache, constipation and colon pain, no research has evaluated the association between intranasal oxytocin and chronic pelvic musculoskeletal pain...
April 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/28413646/role-of-malate-dehydrogenase-in-facilitating-lactate-dehydrogenase-to-support-the-glycolysis-pathway-in-tumors
#19
Siavash Mansouri, Ali Shahriari, Hadi Kalantar, Taraneh Moini Zanjani, Mojtaba Haghi Karamallah
High aerobic glycolysis, as one of the hallmarks of cancer cells, requires nicotinamide adenine dinucleotide (NAD(+)) as a vital co-factor, to guarantee the flow of glycolysis. Malate dehydrogenase (MDH), as an important enzyme in cancer metabolism, is a source of NAD(+) additional to lactate dehydrogenase (LDH). The current study aimed to elucidate the kinetic parameters of MDH in human breast cancer and evaluate its supportive role in the glycolysis pathway. The Michaelis-Menten constant (Km) and maximum velocity (Vmax) of MDH were determined in the crude extracts of human breast tumors and healthy tissue samples, which were obtained directly from the operating theatre...
April 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28411961/nutrition-in-the-first-1000-days-and-respiratory-health-a-descriptive-review-of-the-last-five-years-literature
#20
REVIEW
E Verduci, A Martelli, V L Miniello, M Landi, B Mariani, M Brambilla, L Diaferio, D G Peroni
The aim of this paper is to discuss the current evidence regarding short and long-term health respiratory effects of nutrients and dietary patterns during the first 1000 days from conception. Population of interest included children from birth to two years and their mothers (during pregnancy and lactation). Studies were searched on MEDLINE® and Cochrane database, inserting individually and using the Boolean ANDs and ORs, 'nutrients', 'micronutrients', 'LC-PUFA', 'Mediterranean Diet', 'human milk', 'complementary food', 'pregnancy', 'respiratory disease', 'pulmonary disease', 'asthma', 'epigenetics', 'first 1000 days', 'maternal diet' and 'respiratory health'...
April 12, 2017: Allergologia et Immunopathologia
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