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https://www.readbyqxmd.com/read/29457661/analysis-of-13-c-and-14-c-labeling-in-pyruvate-and-lactate-in-tumor-and-blood-of-lymphoma-bearing-mice-injected-with-13-c-and-14-c-labeled-pyruvate
#1
E M Serrao, M I Kettunen, T B Rodrigues, D Y Lewis, F A Gallagher, D E Hu, K M Brindle
Measurements of hyperpolarized13 C label exchange between injected [1-13 C]pyruvate and the endogenous tumor lactate pool can give an apparent first-order rate constant for the exchange. The determination of the isotope flux, however, requires an estimate of the labeled pyruvate concentration in the tumor. This was achieved here by measurement of the tumor uptake of [1-14 C]pyruvate, which showed that <2% of the injected pyruvate reached the tumor site. Multiplication of this estimated labeled pyruvate concentration in the tumor with the apparent first-order rate constant for hyperpolarized13 C label exchange gave an isotope flux that showed good agreement with a flux determined directly by the injection of non-polarized [3-13 C]pyruvate, rapid excision of the tumor after 30 s and measurement of13 C-labeled lactate concentrations in tumor extracts...
February 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29457119/effects-of-glucose-insulin-infusion-during-major-oral-and-maxillofacial-surgery-on-postoperative-complications-and-outcomes
#2
Akina Tohya, Atsushi Kohjitani, Sachi Ohno, Kaoru Yamashita, Yozo Manabe, Mitsutaka Sugimura
Background: Secretion of hormones, which antagonize the action of insulin, is facilitated in response to surgery, and acute resistance to the action of insulin develops. Our aim is to elucidate the effects of intraoperative glycemic control by glucose-insulin (GI) infusion on postoperative complications and outcomes in major oral and maxillofacial surgery. Findings: Thirty patients aged ≥ 60 years undergoing a radical operation of oral malignant tumors with tissue reconstruction (≥ 8 h) were analyzed...
2018: JA Clin Rep
https://www.readbyqxmd.com/read/29455317/genetic-zygosity-of-mature-ovarian-teratomas-struma-ovarii-and-ovarian-carcinoids
#3
Noriko Kato, Kazuhiro Sakamoto, Koutaro Murakami, Yuri Iwasaki, Akihisa Kamataki, Akira Kurose
Although ovarian monodermal teratomas, including struma ovarii and carcinoids, are closely associated with mature teratomas, their genetic basis is poorly understood. A series of mature and monodermal ovarian teratomas were analyzed by short tandem repeat genotyping to evaluate their genetic zygosity and its associations. Informative DNA genotyping data were obtained for ten mature teratomas, six struma ovarii, and three carcinoids (one insular, one trabecular, and one mucinous). A homozygous genotype was present in five of the ten (50%) mature teratomas, three of the six (50%) struma ovarii, and one of the three (33%) ovarian carcinoids...
February 17, 2018: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/29451329/high-spatiotemporal-resolution-bssfp-imaging-of-hyperpolarized-1-13-c-pyruvate-and-1-13-c-lactate-with-spectral-suppression-of-alanine-and-pyruvate-hydrate
#4
Eugene Milshteyn, Cornelius von Morze, Jeremy W Gordon, Zihan Zhu, Peder E Z Larson, Daniel B Vigneron
PURPOSE: The balanced steady-state free precession (bSSFP) acquisition enables high spatiotemporal resolution for hyperpolarized 13 C MRI at 3T but is limited by spectral contamination from adjacent resonances. The purpose of this study was to develop a framework for in vivo dynamic high resolution imaging of hyperpolarized [1- 13 C]pyruvate and [1- 13 C]lactate generated in vivo at 3T by simplifying the spectrum through the use of selective suppression pulses. METHODS: Spectral suppression pulses were incorporated into the bSSFP sequence for suppression of [1- 13 C]alanine and [1- 13 C]pyruvate-hydrate signals, leaving only the pyruvate and lactate resonances...
February 16, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29444941/lactic-acid-downregulates-viral-microrna-to-promote-epstein-barr-virus-immortalized-b-lymphoblastic-cell-adhesion-and-growth
#5
Xiaohui Mo, Fang Wei, Yin Tong, Ling Ding, Qing Zhu, Shujuan Du, Fei Tan, Caixia Zhu, Yuyan Wang, Qian Yu, Yeqiang Liu, Erle S Robertson, Zhenghong Yuan, Qiliang Cai
High plasma lactate is associated with poor prognosis of many malignancies, but its role in virally mediated cancer progression and underlying molecular mechanisms are unclear. Epstein-Barr virus (EBV), the first human oncogenic virus, causes several cancers, including B cell lymphoma. Here, we report that lactate dehydrogenase (LDH-A) expression and lactate production are elevated in EBV-immortalized B lymphoblastic cells, and lactic acid (LA, acidic lactate) at low concentration triggers EBV-infected B cell adhesion, morphological changes, and proliferation in vitro and in vivo Moreover, LA-induced responses of EBV-infected B cells uniquely occurs in viral latency type III and it is dramatically associated with the inhibition of global viral microRNAs, particularly the miR-BHRF1 cluster, and the high expression of SMAD3 , JUN , and COL1A genes...
February 14, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29444683/potential-effects-of-the-combination-of-nicotinamide-vitamin-b2-and-vitamin-c-on-oxidative-mediated-hepatotoxicity-induced-by-thioacetamide
#6
Samir A E Bashandy, Hossam Ebaid, Sherif A Abdelmottaleb Moussa, Ibrahim M Alhazza, Iftekhar Hassan, Abdulaziz Alaamer, Jameel Al Tamimi
BACKGROUND: The liver disease is one of the most important traditional public health problems in Egypt. Oxidative stress is attributed to such pathological condition that further contributes to the initiation and progression of liver injury. In the present study, we have investigated if the strong antioxidant power of Nicotinamide (NA), Vitamin B2 (VB2), and Vitamin C (VC) can ameliorate TAA-induced oxidative stress-mediated liver injury in the rats. METHODS: Thirty-six albino rats were divided into six groups: Control group; TAA group (IP injection with TAA at a dosage of 200 mg/Kg three times a week for two months); TAA + NA group (rats administered with NA at a dosage of 200 mg/kg daily besides TAA as in the control); TAA + VB2 group (rats administered with vitamin B2 at a dosage of 30 mg/kg daily besides injection with TAA); TAA + VC group (rats administered with vitamin C at a dosage of 200 mg/kg daily along with injection of TAA)...
February 14, 2018: Lipids in Health and Disease
https://www.readbyqxmd.com/read/29436634/capsaicin-inhibits-glycolysis-in-esophageal-squamous-cell-carcinoma-by-regulating-hexokinase%C3%A2-2-expression
#7
Xinli Mao, Hongyuan Zhu, Dinghai Luo, Liping Ye, Huifei Yin, Jinshun Zhang, Yan Zhang, Yu Zhang
Capsaicin is a principal component of hot red peppers and chili peppers. Previous studies have reported that capsaicin exhibits antitumor functions in a variety of tumor models. Although various mechanisms underlying the capsaicin‑mediated inhibition of tumor growth have been demonstrated, the impact of capsaicin on tumor metabolism has rarely been reported. The present study demonstrated that capsaicin exhibited an inhibitory effect on tumor glycolysis in esophageal squamous cell carcinoma (ESCC) cells. Following treatment with capsaicin, glucose consumption and lactate production in ESCC cells was decreased...
February 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29434880/clinical-significance-of-brafv600e-mutation-in-circulating-tumor-dna-in-chinese-patients-with-melanoma
#8
Huan Tang, Yan Kong, Lu Si, Chuanliang Cui, Xinan Sheng, Zhihong Chi, Jie Dai, Sifan Yu, Meng Ma, Xiaowen Wu, Jiayi Yu, Tianxiao Xu, Huan Yu, Junya Yan, Jun Guo
The present study aimed to assess the B rapidly accelerated fibrosarcoma (BRAFV600E) status in plasma from Chinese patients with melanoma, and evaluated its prognostic value following treatment with BRAF inhibitors. Mutation-specific 3D digital polymerase chain reaction (dPCR) was used to quantify BRAFV600E in circulating tumor DNA (ctDNA) in 58 patients with melanoma, prior to treatment with BRAF inhibitors. Correlations between baseline ctDNA levels and clinicopathological characteristics and clinical benefits were then statistically analyzed...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434789/effects-of-pumpless-extracorporeal-lung-assist-on-hemodynamics-gas-exchange-and-inflammatory-cascade-response-during-experimental-lung-injury
#9
Zhihai Ju, Jinhui Ma, Chen Wang, Jie Yu, Yeru Qiao, Feilong Hei
Pumpless extracorporeal lung assist (pECLA) has been reported to efficiently remove the systemic CO 2 production and provide mild to moderate oxygenation, thereby allowing for ventilator settings and modes prioritizing oxygenation and lung protection. However, an adequate bypass flow, the capacity to provide respiratory support and the effect on the inflammatory cascade response and tissue perfusion require further study to be determined. After induction of acute lung injury (ALI) by oleic acid injection, pECLA was implemented in 12 anaesthetized and mechanically ventilated dogs for 48 h...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29434784/effects-of-intratumoral-injection-of-immunoactivator-after-microwave-ablation-on-antitumor-immunity-in-a-mouse-model-of-hepatocellular-carcinoma
#10
Hao Wu, Bin Chen, Baogang Peng
This study investigated the effects of intratumoral injection of immunoactivator after microwave ablation on antitumor immunity in a mouse model of hepatocellular carcinoma. Hepatocellular carcinoma cell line Hepa1-6 was subcutaneously injected into C57/B6 mice to establish a mouse model of hepatocellular carcinoma. When tumor diameter reached 8 mm, microwave ablation was performed for 3 min with temperature controlled at 55°C. Cytokine sustained-release microspheres (CytoMPS) containing human interleukin-2 (hIL-2) and mouse granulocyte macrophage colony-stimulating factor (mGM-CSF) were injected into the tumor of mice in the experimental group (n=5) at 3, 7 and 14 days after ablation, while sustained-release microspheres containing no cytokine were used in the control group (n=5)...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29434760/gambogic-acid-exerts-cardioprotective-effects-in-a-rat-model-of-acute-myocardial-infarction-through-inhibition-of-inflammation-inos-and-nf-%C3%AE%C2%BAb-p38-pathway
#11
Duan Na, Hou Aijie, Luan Bo, Miao Zhilin, Yuan Long
Gamboge, the dried resin secreted by Garcinia maingayii (gambogic tree), was previously demonstrated to exert anti-inflammatory effects. The present study examined the effects of gambogic acid, the major active constituent of gamboge, on myocardial infarction (MI) and inflammation in a rat model and explored the possible underlying mechanisms. The results demonstrated that gambogic acid inhibited the ratio of heart weight to body weight and myocardial damage (via lactate dehydrogenase and cardiac troponin T) in rats with MI...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29429072/an-ex-vivo-ruminal-ovine-model-to-study-the-immediate-immune-response-in-the-context-of-bacterial-lipopolysaccharide
#12
Fathi Abouhajer, Saeed El-Ashram, Musafiri Karama, Shujian Huang, Jian-Feng Liu
We have set up an ex vivo ovine ruminal model, which can mimic the multicellular process to explore the early steps in Salmonella typhimurium lipopolysaccharide (LPS) stimulation using RNA-seq technology. Ovine ruminal explants were collected for histological and transcriptional analysis and supernatants collected to quantitate lactate dehydrogenase (LDH) enzymes. A total of 8 and 523 genes were significantly over-expressed between LPS-treated and control tissues at 6 and 12 h, respectively. However, six and seven hundred and thirteen genes were substantially repressed between the aforementioned tissues, correspondingly...
February 10, 2018: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/29428948/ratio-of-immune-response-to-tumor-burden-predicts-survival-via-regulating-functions-of-lymphocytes-and-monocytes-in-diffuse-large-b-cell-lymphoma
#13
Hongfei Ji, Xingjian Niu, Lei Yin, Yiran Wang, Lan Huang, Qijia Xuan, Liru Li, Han Zhang, Jingtong Li, Yue Yang, Weiwei An, Qingyuan Zhang
BACKGROUND/AIMS: Diffuse large B-cell lymphoma (DLBCL) is an aggressive disease, and is the most common type of lymphoma in adults. Although significant progress in treatment has been made using chemotherapy combinations, there exist a large amount of relapse or refractory cases. Thus, effective clinical biomarkers for DLBCL are urgently needed. Our study aims to explore the predictive significance of using the immune response to tumor burden ratio [defined as the lymphocyte to monocyte ratio (LMR)/lactate dehydrogenase (LDH) levels] in 184 DLBCL patients and the potential mechanism underlying the use of the LMR to tumor burden ratio in predicting patient survival...
February 2, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29422776/different-tp53-mutants-in-p53-overexpressed-epithelial-ovarian-carcinoma-can-be-associated-both-with-altered-and-unaltered-glycolytic-and-apoptotic-profiles
#14
Stephanie Antoun, David Atallah, Roula Tahtouh, Nada Alaaeddine, Malak Moubarak, Abir Khaddage, Eliane Nasr Ayoub, George Chahine, George Hilal
Background: p53 is a tumor suppressor and key regulator of glycolysis in cancer cells, however highly mutated in tumors. In ovarian cancer, studies concerning p53 mutations focus on the DNA binding domain since the majority of hotspot mutations affects this region. Yet, mutations in other regions such as the proline rich domain may also affect the protein's expression and activity. The aim of this study is to investigate the effect of various positions of mutations in TP53 gene on glycolysis, apoptosis and transcription of p53 target genes...
2018: Cancer Cell International
https://www.readbyqxmd.com/read/29421654/extracellular-acidification-by-lactic-acid-suppresses-glucose-deprivation-induced-cell-death-and-autophagy-in-b16-melanoma-cells
#15
Taisuke Matsuo, Yasuyuki Sadzuka
In solid tumors, cancer cells survive and proliferate under conditions of microenvironment stress such as poor nutrients and hypoxia due to inadequate vascularization. These stress conditions in turn activate autophagy, which is important for cancer cell survival. However, autophagy has a contrary effect of inducing cell death in cancer cells cultured in vitro under conditions of glucose deprivation. In this study, we hypothesized that supplementation of lactic acid serves as a means of cell survival under glucose-deprived conditions...
February 5, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29419530/challenges-and-opportunities-for-high-grade-b-cell-lymphoma-with-myc-and-bcl2-and-or-bcl6-rearrangement-double-hit-lymphoma
#16
Dongfeng Zeng, Aakash Desai, Fangfang Yan, Tiejun Gong, Haige Ye, Makhdum Ahmed, Krystle Nomie, Jorge Romaguera, Richard Champlin, Shaoying Li, Michael Wang
The most common subtype of non-Hodgkin lymphoma, diffuse large B-cell lymphoma, is cured in approximately two thirds of patients after initial therapy. The remaining one-third of patients who suffer relapse or become refractory have very poor survival outcomes despite salvage chemotherapy with or without stem cell transplantation. A considerable proportion of relapsed or refractory large B cells belong to the WHO subtype known as high-grade B-cell lymphoma with rearrangement of MYC and BCL2 and/or BCL6, also known as double-hit lymphoma (DHL)...
February 6, 2018: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29415045/linear-programming-model-can-explain-respiration-of-fermentation-products
#17
Philip Möller, Xiaochen Liu, Stefan Schuster, Daniel Boley
Many differentiated cells rely primarily on mitochondrial oxidative phosphorylation for generating energy in the form of ATP needed for cellular metabolism. In contrast most tumor cells instead rely on aerobic glycolysis leading to lactate to about the same extent as on respiration. Warburg found that cancer cells to support oxidative phosphorylation, tend to ferment glucose or other energy source into lactate even in the presence of sufficient oxygen, which is an inefficient way to generate ATP. This effect also occurs in striated muscle cells, activated lymphocytes and microglia, endothelial cells and several mammalian cell types, a phenomenon termed the "Warburg effect"...
2018: PloS One
https://www.readbyqxmd.com/read/29413596/an-aptamer-fe3-modified-nanoparticle-for-lactate-oxidation-and-tumor-photodynamic-therapy
#18
Huan Yang, Wen-Long Lu, Tao Huang, Qiu-Yun Chen, Jing Gao, Yao Zhao
To develop a cancer targeting lactate attenuator in vivo for cancer phototherapy and inhibition of HIF-1, we report an aptamer modified photo-responsive nanoparticle (labeled as Mn-D@BPFe-A) for lactate oxidation and cancer phototherapy. Mn-D@BPFe-A was constructed by the assembly of functional complex with BSA, followed by surface metal coordination and the recognition of Fe3+ with GAG containing sequence. Upon irradiation, Mn-D@BPFe-A NPs can oxidize water with the generation of OH, which convert lactate into pyruvate both in vitro and in vivo...
January 29, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29412741/pharmacologic-reprogramming-designed-to-induce-a-warburg-effect-in-porcine-fetal-fibroblasts-alters-gene-expression-and-quantities-of-metabolites-from-conditioned-media-without-increased-cell-proliferation
#19
Bethany R Mordhorst, Stephanie L Murphy, Rence M Ross, Melissa S Samuel, Shirley Rojas Salazar, Tieming Ji, Susanta K Behura, Kevin D Wells, Jonathan A Green, Randall S Prather
The Warburg effect is a metabolic phenomenon characterized by increased glycolytic activity, decreased mitochondrial oxidative phosphorylation, and the production of lactate. This metabolic phenotype is characterized in rapidly proliferative cell types such as cancerous cells and embryonic stem cells. We hypothesized that a Warburg-like metabolism could be achieved in other cell types by treatment with pharmacological agents, which might, in turn, facilitate nuclear reprogramming. The aim of this study was to treat fibroblasts with CPI-613 and PS48 to induce a Warburg-like metabolic state...
February 2018: Cellular Reprogramming
https://www.readbyqxmd.com/read/29403301/early-exposure-to-distinct-sources-of-lipids-affects-differently-the-development-and-hepatic-inflammatory-profiles-of-21-day-old-rat-offspring
#20
Laís Vales Mennitti, Lila Missae Oyama, Aline Boveto Santamarina, Claudia Maria da Penha Oller do Nascimento, Luciana Pellegrini Pisani
Introduction: Maternal diet composition of fatty acids during pregnancy and lactation seems to modify the fetal programming, epigenetic pattern and offspring phenotype. Aim: Herein, we investigated the effects of maternal consumption of normal-fat diets with distinct lipid sources during pregnancy and lactation on the somatic development and proinflammatory status of 21-day-old rat offspring. Materials and Methods: On the first day of pregnancy, female Wistar rats were divided into four groups as follows: soybean oil (M-SO), lard (M-L), hydrogenated vegetable fat (M-HVF) and fish oil (M-FO)...
2018: Journal of Inflammation Research
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