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Hypoxia induce factor

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https://www.readbyqxmd.com/read/29791781/a-dual-role-of-mir-22-in-rhabdomyolysis-induced-acute-kidney-injury-aki
#1
Susanne Mathia, Lucas J Rudigier, Mumtaz Kasim, Karin M Kirschner, Pontus B Persson, Kai-Uwe Eckardt, Christian Rosenberger, Michael Fähling
AIM: In acute kidney injury (AKI) regions of the kidney are hypoxic. However, for reasons yet unknown, adaptation to hypoxia through hypoxia inducible factor (HIF) is limited. Here we studied miR-22, a potential HIF repressor, in normal kidneys, as well as in rhabdomyolysis-induced AKI, a condition where miR-22 is up-regulated. METHODS: AKI in mice was provoked by IM injection of glycerol. Tissue homogenates were processed to determine the levels of candidate RNAs and proteins, as well as global gene expression profiles...
May 23, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29791586/hypoxia-induced-hyperpermeability-of-rat-glomerular-endothelial-cells-involves-hif-2%C3%AE-mediated-changes-in-the-expression-of-occludin-and-zo-1
#2
Peng-Li Luo, Yan-Jun Wang, Yan-Yan Yang, Jia-Jia Yang
This study aimed to investigate the role of hypoxia-inducible factor-2α (HIF-2α) in the expression of tight junction proteins and permeability alterations in rat glomerular endothelial cells (rGENCs) under hypoxia conditions. The expression level of HIF-2α and tight junction proteins (occludin and ZO-1) in rGENCs were examined following 5% oxygen density exposure at different treatment times. HIF-2α lentivirus transfection was used to knockdown HIF-2α expression. Cells were divided into four groups: 1) control group (rGENCs were cultured under normal oxygen conditions), 2) hypoxia group (rGENCs were cultured under hypoxic conditions), 3) negative control group (rGENCs were infected with HIF-2α lentivirus negative control vectors and cultured under hypoxic conditions), and 4) Len group (rGENCs were transfected with HIF-2α lentivirus and cultured under hypoxic conditions)...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29790270/metabolomics-reveals-the-key-role-of-oxygen-metabolism-in-the-heat-susceptibility-of-an-alpine-dwelling-ghost-moth-thitarodes-xiaojinensis-lepidoptera-hepialidae
#3
Wei Zhu, Qian Meng, Huan Zhang, Meng-Long Wang, Xuan Li, Hong-Tuo Wang, Gui-Ling Zhou, Lin Miao, Qi-Lian Qin, Ji-Hong Zhang
Ghost moths inhabiting the alpine meadows of the Tibetan Plateau are cold-adapted stenothermal organisms that are susceptible to heat (dead within 7 days of 27 °C exposure). Exploring the metabolic basis of their heat susceptibility would extend our understanding of the thermal biology of alpine dwelling invertebrates. Here, gas chromatography-mass spectrometry-based metabolomics was combined with physiological and transcriptional approaches to determine the metabolic mechanisms of heat susceptibility in Thitarodes xiaojinensis larvae...
May 23, 2018: Insect Science
https://www.readbyqxmd.com/read/29789753/hydrogen-protects-lung-from-hypoxia-re-oxygenation-injury-by-reducing-hydroxyl-radical-production-and-inhibiting-inflammatory-responses
#4
Meihong Chen, Jie Zhang, Yun Chen, Yan Qiu, Zi Luo, Sixia Zhao, Lei Du, Dongbo Tian
Here we investigated whether hydrogen can protect the lung from chronic injury induced by hypoxia/re-oxygenation (H/R). We developed a mouse model in which H/R exposure triggered clinically typical lung injury, involving increased alveolar wall thickening, infiltration by neutrophils, consolidation, alveolar hemorrhage, increased levels of inflammatory factors and recruitment of M1 macrophages. All these processes were attenuated in the presence of H2 . We found that H/R-induced injury in our mouse model was associated with production of hydroxyl radicals as well as increased levels of colony-stimulating factors and circulating leukocytes...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789684/dipeptidyl-peptidase-iv-dpp-4-inhibition-alleviates-pulmonary-arterial-remodeling-in-experimental-pulmonary-hypertension
#5
Jian Xu, Jingjing Wang, Mengyu He, Honghao Han, Weiping Xie, Hong Wang, Hui Kong
Dipeptidyl peptidase IV (DPP-4) is well known for its role in glucose homeostasis, and DPP-4 inhibitor (DPP-4i) exhibits multiple actions in cardiovascular diseases. However, the effect of DPP-4i on pulmonary hypertension (PH) remains unclear. Therefore, this study aims to investigate the effect of DPP-4i on pulmonary arterial remodeling in rats with PH and the potential underlying mechanisms. Our results show that DPP-4 was expressed in epithelial cells, endothelial cells, smooth muscle cells, and inflammatory cells in lung...
May 22, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29789538/salvanic-acid-b-inhibits-glycolysis-in-oral-squamous-cell-carcinoma-via-targeting-pi3k-akt-hif-1%C3%AE-signaling-pathway
#6
Jie Wei, Jun Wu, Wen Xu, Hong Nie, Ruiqing Zhou, Rui Wang, Yang Liu, Guoyao Tang, Jianyong Wu
Our previous study demonstrated a progressive glycolytic perturbation during the course of DMBA-induced hamster oral carcinogenesis, which was attenuated by salvianolic acid B (Sal-B) treatment along with decreased incidences of oral squamous cell carcinoma (OSCC) formation. It was proposed that metabolic modulation should be an additional mode of action attributable to Sal-B's anti-carcinogenic activity. However, the molecular mechanisms underlying Sal-B-induced metabolic modulation function remained elusive...
May 22, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29788004/juvenile-traumatic-brain-injury-results-in-cognitive-deficits-associated-with-impaired-endoplasmic-reticulum-stress-and-early-tauopathy
#7
Michael J Hylin, Ryan C Holden, Aidan C Smith, Aric F Logsdon, Rabia Qaiser, Brandon P Lucke-Wold
The leading cause of death in the juvenile population is trauma, and in particular neurotrauma. The juvenile brain response to neurotrauma is not completely understood. Endoplasmic reticulum (ER) stress has been shown to contribute to injury expansion and behavioral deficits in adult rodents and furthermore has been seen in adult postmortem human brains diagnosed with chronic traumatic encephalopathy. Whether endoplasmic reticulum stress is increased in juveniles with traumatic brain injury (TBI) is poorly delineated...
May 22, 2018: Developmental Neuroscience
https://www.readbyqxmd.com/read/29786870/the-association-between-local-atherosclerosis-of-the-prostatic-artery-and-benign-prostatic-enlargement-in-humans-putative-mechanism-of-chronic-ischemia-for-prostatic-enlargement
#8
Nobuhiro Haga, Hidenori Akaihata, Junya Hata, Ken Aikawa, Tomohiko Yanagida, Kanako Matsuoka, Tomoyuki Koguchi, Seiji Hoshi, Soichiro Ogawa, Masao Kataoka, Yuichi Sato, Kei Ishibashi, Osamu Suzuki, Yuko Hashimoto, Yoshiyuki Kojima
BACKGROUND: To investigate the possible pathogenesis of the benign prostatic enlargement (BPE) induced by local atherosclerosis, the association between local atherosclerosis and prostatic enlargement was investigated, and molecular biological analyses were performed using human prostatectomy specimens. METHODS: A total of 69 consecutive patients who underwent robot-assisted radical prostatectomy (RARP) participated in this prospective study. To evaluate actual local atherosclerosis, prostatic arteries were removed during RARP...
May 21, 2018: Prostate
https://www.readbyqxmd.com/read/29786753/hypoxia%C3%A2-induced-expression-of-cxcr4-favors-trophoblast-cell-migration-and-invasion-via-the-activation-of-hif%C3%A2-1%C3%AE
#9
Zhan Zhang, Pengyun Li, Yan Wang, Huan Yan
The placenta initially develops in a low‑oxygen environment up to week 8‑10 of gestation, and a low oxygen level is a critical factor in the regulation of trophoblast migration and invasion. CXC chemokine receptor 4 (CXCR4) is transcriptionally activated by hypoxia in cancer cells. However, whether CXCR4 is involved in hypoxia‑inducible factor (HIF)‑1α‑dependent trophoblastic migration and invasion in a physiologically hypoxic environment (3% O2) remains to be fully elucidated and requires further investigation...
May 22, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29785943/-roles-and-molecular-mechanisms-of-hypoxia-inducible-factors-in-renal-cell-carcinoma
#10
Jun Xia Zou, Ke Chen
Renal cancer is a common urologic malignancy. However, the therapeutic options for metastatic renal cancer patients are limited. Hypoxia (low oxygen) is a fundamental microenvironmental determinant of solid tumor pathophysiology. Recent data from molecular and clinical studies indicate that hypoxia-inducible factors (HIFs) play critical roles in the development and progress of renal cell carcinoma (RCC). The HIF transcription factor family is a type of heterodimeric transcription factor consisting of HIF-α and HIF-β subunits and can transcriptionally activate genes that mediate the hypoxic response...
May 20, 2018: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/29785781/schisantherin-a-protects-renal-tubular-epithelial-cells-from-hypoxia-reoxygenation-injury-through-the-activation-of-pi3k-akt-signaling-pathway
#11
Jiachuan Gong, Xuezhen Wang
Schisantherin A (SchA), a dibenzocyclooctadiene lignan isolated from the fruit of Schisandra sphenanthera, was reported to possess anti-inflammatory and antioxidant activities. However, its protective effect against renal ischemia-reperfusion (I/R) injury in human renal tubular epithelial cells subjected to hypoxia/reoxygenation (H/R) has never been studied. Thus, herein, we investigated the effect of SchA on renal I/R injury in vitro. Our results demonstrated that SchA pretreatment significantly improved HK-2 cell viability exposed to H/R...
May 22, 2018: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/29785022/novel-peptide-gx1-inhibits-angiogenesis-by-specifically-binding-to-transglutaminase-2-in-the-tumorous-endothelial-cells-of-gastric-cancer
#12
Zhijie Lei, Na Chai, Miaomiao Tian, Ying Zhang, Guodong Wang, Jian Liu, Zuhong Tian, Xiaofang Yi, Di Chen, Xiaowei Li, Pengfei Yu, Hao Hu, Bing Xu, Chao Jian, Zhenyuan Bian, Hao Guo, Jinpeng Wang, Shiming Peng, Yongzhan Nie, Niu Huang, Sijun Hu, Kaichun Wu
The clinical application of GX1, an optimal gastric cancer (GC) targeting peptide, is greatly limited because its receptor in the GC vasculature is unknown. In this study, we screened the candidate receptor of GX1, transglutaminase-2(TGM2), by co-immunoprecipitation (co-IP) combined with mass spectrometry. We found that TGM2 was up-regulated in GC vascular endothelial cells and that GX1 receptor expression was suppressed correspondingly after TGM2 downregulation. A highly consistent co-localization of GX1 receptor and TGM2 was detected at both the cellular and tissue levels...
May 21, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29784900/irak-inhibitor-protects-the-intestinal-tract-of-necrotizing-enterocolitis-by-inhibiting-the-toll-like-receptor-tlr-inflammatory-signaling-pathway-in-rats
#13
Yu Hou, Xin Lu, Yueju Zhang
BACKGROUND The aim of this study was to assess the effects of interleukin-1 (IL-1) receptor associated kinase (IRAK) inhibitors on intestinal injury induced by necrotizing enterocolitis (NEC) in neonatal rats and its regulation on the intestinal Toll-like receptor (TLR) inflammatory signaling pathway. MATERIAL AND METHODS The neonatal rat models of NEC were established though hypoxia-cold stimulation. All rats were divided into 3 groups: an NEC model group (NEC group), an IRAK inhibitor group (IRAKI group), and a normal control group (NC group)...
May 22, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29781855/improving-senescent-wound-healing-with-local-and-systemic-therapies
#14
Caroline Szpalski, Parag Butala, Meredith T Vandegrift, Denis Knobel, Robert J Allen, Pierre B Saadeh, Stephen M Warren
The population is aging, and the prevalence of chronic wounds is increasing. Because neovascularization is essential for tissue repair and both local and systemic factors affect new blood vessel formation, we hypothesize that altering either pathway would reciprocally enhance wound healing in the aged. To test this hypothesis, p53 was locally suppressed and endothelial progenitor cells (EPCs) were systemically mobilized in a murine model of senescent wound healing.Bilateral 6-mm full-thickness stented wounds were made on the dorsum of Zmpste24 mice...
May 17, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29780898/sumoylation-and-phosphorylation-cross-talk-in-hepatocellular-carcinoma
#15
REVIEW
Maria Lauda Tomasi, Komal Ramani
Hepatocellular carcinoma (HCC) is a primary malignancy of the liver and occurs predominantly in patients with underlying chronic liver disease and cirrhosis. The large spectrum of protein post-translational modification (PTM) includes numerous critical signaling events that occur during neoplastic transformation. PTMs occur to nearly all proteins and increase the functional diversity of proteins. We have reviewed the role of two major PTMs, SUMOylation and phosphorylation, in the altered signaling of key players in HCC...
2018: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29780805/stabilization-of-hypoxia-inducible-factor-1-alpha-augments-the-therapeutic-capacity-of-bone-marrow-derived-mesenchymal-stem-cells-in-experimental-pneumonia
#16
Naveen Gupta, Victor Nizet
Bone marrow-derived mesenchymal stem cells (MSCs) have therapeutic effects in experimental models of lung injury. Hypoxia-inducible factor-1 alpha (HIF-1α) is a transcriptional regulator that influences cellular metabolism, energetics, and survival under hypoxic conditions. The current study investigated the effects of stabilizing HIF-1α on the therapeutic capacity of MSCs in an experimental mouse model of bacterial pneumonia. HIF-1α stabilization was achieved by the small molecule prolyl-hydroxlase inhibitor, AKB-4924 (Aerpio Therapeutics, Inc...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29780505/macrophage-mediated-delivery-of-light-activated-nitric-oxide-prodrugs-with-spatial-temporal-and-concentration-control
#17
Michael A Evans, Po-Ju Huang, Yuji Iwamoto, Kelly N Ibsen, Emory M Chan, Yutaka Hitomi, Peter C Ford, Samir Mitragotri
Nitric oxide (NO) holds great promise as a treatment for cancer hypoxia, if its concentration and localization can be precisely controlled. Here, we report a "Trojan Horse" strategy to provide the necessary spatial, temporal, and dosage control of such drug-delivery therapies at targeted tissues. Described is a unique package consisting of (1) a manganese-nitrosyl complex, which is a photoactivated NO-releasing moiety (photoNORM), plus Nd3+ -doped upconverting nanoparticles (Nd-UCNPs) incorporated into (2) biodegradable polymer microparticles that are taken up by (3) bone-marrow derived murine macrophages...
April 21, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779471/hypoxia-induces-hypoxia-inducible-factor-1%C3%AE-and-potential-hif-responsive-gene-expression-in-uterine-leiomyoma
#18
Hiroshi Ishikawa, Linlin Xu, Kunizui Sone, Tatsuya Kobayashi, Guiwen Wang, Makio Shozu
Uterine leiomyoma is characterized by abundant extracellular matrix and broad avascular areas, both constantly resulting in hypoxia, suggesting some hypoxia-induced response function. Here, we examined whether hypoxia-inducible factor 1α (HIF-1α)- mediated hypoxic response function in uterine leiomyoma. Immunoblotting detected higher basal HIF-1α protein expression in nuclear extracts from uterine leiomyoma tissues than in those from the adjacent myometrium ( P = .0011). Immunohistochemical analysis revealed the presence of HIF-1α-positive cellular components in both leiomyoma and surrounding myometrial tissues...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29778908/mammalian-target-of-rapamycin-complex-2-signaling-in-obese-women-changes-after-bariatric-surgery
#19
Marcela Augusta de Souza Pinhel, Carolina Ferreira Nicoletti, Natalia Yumi Noronha, Bruno Affonso Parenti de Oliveira, Cristiana Cortes-Oliveira, Wilson Salgado, Wilson Araujo da Silva, Doroteia Rossi Silva Souza, Julio Sergio Marchini, Carla Barbosa Nonino
OBJECTIVES: After bariatric surgery, modifications to signaling pathway networks including those of the metabolic regulator called mammalian or mechanistic target of rapamycin (mTOR) may lead to molecular alterations related to energy source availability, systemic nutrients, and catabolic and anabolic cellular processes. This study aimed to identify gene expression changes with regard to the mTOR complex 2 subunit signaling pathway in obese patients before and after bariatric surgery...
March 21, 2018: Nutrition
https://www.readbyqxmd.com/read/29775479/acute-intermittent-hypoxia-and-rehabilitative-training-following-cervical-spinal-injury-alters-neuronal-hypoxia-and-plasticity-associated-protein-expression
#20
Atiq Hassan, Breanna M Arnold, Sally Caine, Behzad M Toosi, Valerie M K Verge, Gillian D Muir
One of the most promising approaches to improve recovery after spinal cord injury (SCI) is the augmentation of spontaneously occurring plasticity in uninjured neural pathways. Acute intermittent hypoxia (AIH, brief exposures to reduced O2 levels alternating with normal O2 levels) initiates plasticity in respiratory systems and has been shown to improve recovery in respiratory and non-respiratory spinal systems after SCI in experimental animals and humans. Although the mechanism by which AIH elicits its effects after SCI are not well understood, AIH is known to alter protein expression in spinal neurons in uninjured animals...
2018: PloS One
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