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https://www.readbyqxmd.com/read/29053417/hif-1%C3%AE-promotes-breast-cancer-cell-mcf-7-proliferation-and-invasion-through-regulating-mir-210
#1
Yang Zhang, Jinyin Yan, Lu Wang, Hao Dai, Ning Li, Wanning Hu, Haifeng Cai
OBJECTIVE: Many malignant tumors grow in hypoxic condition, which is associated with tumor growth, invasion, and metastasis. MicroRNAs are of great significance in the development of multiple malignant tumors. This study cultured breast cancer cell MCF-7 under the condition of different concentrations of oxygen, to test cell proliferation and invasion, and detect miR-210 expression, aiming to analyze the influence of hypoxia on breast cancer cell behaviors as well as miR-210 expressions...
October 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29052350/platelet-lysate-activates-quiescent-cell-proliferation-and-reprogramming-in-human-articular-cartilage-involvement-of-hypoxia-inducible-factor-1
#2
Van Thi Nguyen, Ranieri Cancedda, Fiorella Descalzi
The idea of rescuing the body self-repair capability lost during evolution is progressively gaining ground in Regenerative Medicine. In particular, growth factors and bioactive molecules derived from activated platelets emerged as promising therapeutic agents acting as trigger for repair of tissue lesions and restoration of tissue functions. Aim of this study was to assess the potential of a Platelet Lysate (PL) for human articular cartilage repair considering its activity on progenitor cells and differentiated chondrocytes...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29051813/differential-impact-of-various-reactive-oxygen-species-ros-on-hif-1%C3%AE-p53-direct-interaction-in-sk-n-mc-neuroblastoma-cells
#3
Elham Parandavar, Razieh Yazdanparast
BACKGROUND: A vital property of eukaryotic cells physiology is their rather quick response to variation of oxygen tension, mainly by a transcription factor known as hypoxia-inducible factor-1 (HIF-1). Aside from its transcriptional regulation, other mechanisms, such as post translational modifications and protein-protein interactions, the interaction between HIF-1α and p53 has attracted more attention mainly due to simultaneous enhancement in the protein levels of these two anti- and pro-apoptotic vital transcriptional factors within the ROS-stressed cells...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/29051733/system-pharmacology-based-dissection-of-the-synergistic-mechanism-of-huangqi-and-huanglian-for-diabetes-mellitus
#4
Shi-Jun Yue, Juan Liu, Wu-Wen Feng, Fei-Long Zhang, Jian-Xin Chen, Lan-Ting Xin, Cheng Peng, Hua-Shi Guan, Chang-Yun Wang, Dan Yan
The rapidly increasing diabetes mellitus (DM) is becoming a major global public health issue. Traditional Chinese medicine (TCM) has a long history of the treatment of DM with good efficacy. Huangqi and Huanglian are one of the most frequently prescribed herbs for DM, and the combination of them occurs frequently in antidiabetic formulae. However, the synergistic mechanism of Huangqi (Radix Astragali) and Huanglian (Rhizoma Coptidis) has not been clearly elucidated. To address this problem, a feasible system pharmacology model based on chemical, pharmacokinetic and pharmacological data was developed via network construction approach to clarify the synergistic mechanisms of these two herbs...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29051303/transport-associated-pathway-responses-in-ovine-fetal-membranes-to-changes-in-amniotic-fluid-dynamics
#5
Cecilia Y Cheung, Debra F Anderson, Robert A Brace
Current evidence suggests that amniotic fluid volume (AFV) is actively regulated by vesicular transport of amniotic fluid outward across the amnion and into the underlying fetal vasculature in the placenta. Our objective was to determine whether gene expression profiles of potential stimulators, inhibitors, and mediators of vesicular transport are altered in response to changes in intramembranous absorption (IMA) rate. Samples of ovine amnion and chorion were obtained from fetal sheep with normal, experimentally reduced or increased AFVs and IMA rates...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29050261/alpha-linolenic-acid-stabilizes-hif-1-%C3%AE-and-downregulates-fasn-to-promote-mitochondrial-apoptosis-for-mammary-gland-chemoprevention
#6
Subhadeep Roy, Atul Kumar Rawat, Shreesh Raj Sammi, Uma Devi, Manjari Singh, Swetlana Gautam, Rajnish Kumar Yadav, Jitendra Kumar Rawat, Lakhveer Singh, Mohd Nazam Ansari, Abdulaziz S Saeedan, Rakesh Pandey, Dinesh Kumar, Gaurav Kaithwas
Alpha linolenic acid is an essential polyunsaturated fatty acid and is reported to have the anti-cancer potential with no defined hypothesis or mechanism/s. Henceforth present study was in-quested to validate the effect of alpha linolenic acid on mitochondrial apoptosis, hypoxic microenvironment and de novo fatty acid synthesis using in-vitro and in-vivo studies. The IC50 value of alpha linolenic acid was recorded to be 17.55μM against ER+MCF-7 cells. Treatment with alpha linolenic acid was evident for the presence of early and late apoptotic signals along with mitochondrial depolarization, when studied through acridine orange/ethidium bromide and JC-1 staining...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050208/hif-1%C3%AE-crat-mir-144-3p-axis-dysregulation-promotes-osteoarthritis-chondrocyte-apoptosis-and-vlcfa-accumulation
#7
Jinsoo Song, Yeon-Ho Kang, Sik Yoon, Churl-Hong Chun, Eun-Jung Jin
The functional role(s) of peroxisomes in osteoarthritis remains unclear. We demonstrated that peroxisomal dysfunction in osteoarthritis is responsible for very-long-chain fatty acid (VLCFA) accumulation. Through gene-profiling analyses, we identified CRAT as the gene responsible for this event. CRAT expression was suppressed in osteoarthritis chondrocytes, and its knockdown yielded pathological osteoarthritic characteristics, including VLCFA accumulation, apoptosis, autophagic inhibition, and mitochondrial dysfunction...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050008/response-of-the-endothelium-to-the-epicutaneous-application-of-leukotriene-b4
#8
Sabina C A Hanssen, Anke G M Hendriks, Romy M C Keijsers, Piet E J van Erp, Carine J M van der Vleuten, Marieke M B Seyger, Peter C M van de Kerkhof
BACKGROUND: Vascular changes, both endothelial and functional, are crucial events in inflammatory responses. OBJECTIVES: To investigate the dynamics of endothelial cell (EC) and functional changes during acute inflammation in an in vivo model of the skin using leukotriene B4. METHODS: EC proliferation, vascular network size, vessel diameter (VD), and hypoxia-inducible factor (HIF)-1α were studied by immunohistochemical CD31/Ki67 double staining and single staining of HIF-1α...
October 20, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/29050006/recent-insights-into-the-biological-functions-of-sestrins-in-health-and-disease
#9
Menglong Wang, Yao Xu, Jianfang Liu, Jing Ye, Wenhui Yuan, Huimin Jiang, Zhen Wang, Hong Jiang, Jun Wan
Sestrins (Sesns) have been identified as a family of highly conserved stress-inducible proteins that are strongly up-regulated by various stresses, including DNA damage, oxidative stress, and hypoxia. The Sesns play protective roles in most physiological and pathological conditions mainly through the regulation of oxidative stress, inflammation, autophagy, endoplasmic reticulum stress, and metabolic homeostasis. In this review, we discussed the possible regulators of Sesns expression, such as p53, forkhead box O, nuclear factor erythroid 2 like 2 (Nrf2), NH (2)-terminal kinase (JNK)/c-Jun pathway and hypoxia-inducible factor-1α (Hif-1α), and the downstream pathways regulated by the Sesns including AMP-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) signaling, mitogen-activated protein kinases (MAPKs) signaling, Nrf2 signaling, NADPH oxidase signaling and transforming growth factor β (TGF-β) signaling in heart diseases, lung diseases, gastrointestinal tract diseases, liver and metabolism diseases, neurological diseases, kidney diseases and immunological diseases...
October 19, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29049022/cardiovascular-adaptation-to-hypoxia-and-the-role-of-peripheral-resistance
#10
Andrew S Cowburn, David Macias, Charlotte Summers, Edwin R Chilvers, Randall S Johnson
Systemic vascular pressure in vertebrates is regulated by a range of factors: one key element of control is peripheral resistance in tissue capillary beds. Many aspects of the relationship between central control of vascular flow and peripheral resistance are unclear. An important example of this is the relationship between hypoxic response in individual tissues, and the effect that response has on systemic cardiovascular adaptation to oxygen deprivation. We show here how hypoxic response via the HIF transcription factors in one large vascular bed, that underlying the skin, influences cardiovascular response to hypoxia in mice...
October 19, 2017: ELife
https://www.readbyqxmd.com/read/29047405/cortisol-inhibits-mtor-signaling-in-avascular-necrosis-of-the-femoral-head
#11
Yun Liao, Rui Su, Ping Zhang, Bo Yuan, Ling Li
BACKGROUND: ANFH is a major health problem, to which long lasting and definitive treatments are lacking. The aim of this study is to study RNA alterations attributed to cortisol-induced ANFH. METHODS: Rat models were stratified into three groups: in vitro group (n = 20) for molecular biological assays, control group (n = 3), and ANFH group induced using lipopolysaccharide and dexamethasone (n = 3). Bone marrow-derived endothelial progenitor cells (BM-EPCs) were extracted from the rats...
October 18, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29047187/a-novel-hif1an-substrate-kank3-plays-a-tumor-suppressive-role-in-hepatocellular-carcinoma
#12
Iljin Kim, Jengmin Kang, Heon Yung, Jong-Wan Park
The KN motif and ankyrin repeat domain-containing protein (KANK) family is involved in actin cytoskeleton organization and cell motility. Compared with other KANK members, the biological function of KANK3 is not clear. Here, we identified KANK3 as a new substrate for the oxygen sensor hypoxia-inducible factor 1-alpha inhibitor (HIF1AN), which hydroxylates HIF-1/2α and other ankyrin repeat domain-containing proteins at asparagine residues. An in vitro hydroxylation assay clearly demonstrated asparaginyl hydroxylation of KANK3 by HIF1AN, and mass spectroscopic analysis revealed that KANK3 is hydroxylated at three asparagine residues within the ankyrin repeat domain...
October 19, 2017: Cell Biology International
https://www.readbyqxmd.com/read/29047082/a-brief-overview-of-nitric-oxide-and-reactive-oxygen-species-signaling-in-hypoxia-induced-pulmonary-hypertension
#13
Ariel Jaitovich, David Jourd'heuil
Pulmonary hypertension (PH) is characterized by increased vasoconstriction and smooth muscle cell hyperplasia driving pathological vascular remodeling of arterial vessels. In this short review, we discuss the primary source of reactive oxygen species (ROS) and nitric oxide (NO) relevant to PH and the mechanism by which dysregulation of their production contributes to PH. Specifically, hypoxia-induced PH is associated with diminished endothelial nitric oxide synthase (eNOS)-derived NO production and increased production of superoxide (O2(•-)) through eNOS uncoupling and defective mitochondrial respiration...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29046352/the-lignan-manassantin-is-a-potent-and-specific-inhibitor-of-mitochondrial-complex-i-and-bioenergetic-activity-in-mammals
#14
Yibao Ma, Hae-Ki Min, Unsong Oh, Adam M Hawkridge, Wei Wang, Ahmed A Mohsin, Qun Chen, Arun Sanyal, Edward J Lesnefsky, Xianjun Fang
Dineolignans manassantin A and B from the plant Saururus cernuus are used in traditional medicine to manage a wide range of ailments such as edema, jaundice, and gonorrhea. Cell-based studies have identified several molecular target candidates of manassantin including NF-kappaB, MAPK, STAT3 and hypoxia-inducible factor 1 alpha (HIF-1alpha). It is unclear whether or how these structurally diverse proteins or pathways mediate any of the medical benefits of manassantin in vivo. Moreover, it has been recently reported that manassantin causes developmental arrest in zebrafish by inhibiting the mitochondrial complex I, but it is unknown whether manassantin inhibits mitochondrial respiration in intact mammalian cells and live animals...
October 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29045486/thiamine-deficiency-activates-hypoxia-inducible-factor-1%C3%AE-to-facilitate-pro-apoptotic-responses-in-mouse-primary-astrocytes
#15
Kristy Zera, Jason Zastre
Thiamine is an essential enzyme cofactor required for proper metabolic function and maintenance of metabolism and energy production in the brain. In developed countries, thiamine deficiency (TD) is most often manifested following chronic alcohol consumption leading to impaired mitochondrial function, oxidative stress, inflammation and excitotoxicity. These biochemical lesions result in apoptotic cell death in both neurons and astrocytes. Comparable histological injuries in patients with hypoxia/ischemia and TD have been described in the thalamus and mammillary bodies, suggesting a congruency between the cellular responses to these stresses...
2017: PloS One
https://www.readbyqxmd.com/read/29045477/tubastatin-ameliorates-pulmonary-fibrosis-by-targeting-the-tgf%C3%AE-pi3k-akt-pathway
#16
Shigeki Saito, Yan Zhuang, Bin Shan, Svitlana Danchuk, Fayong Luo, Martina Korfei, Andreas Guenther, Joseph A Lasky
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive and fatal disease. Histone deacetylase 6 (HDAC6) alters function and fate of various proteins via deacetylation of lysine residues, and is implicated in TGF-β1-induced EMT (epithelial-mesenchymal transition). However, the role of HDAC6 in pulmonary fibrosis is unknown. METHODS: HDAC6 expression in IPF and control lungs was assessed by quantitative real-time PCR (qRT-PCR) and immunoblots. Lung fibroblasts were treated with TGF-β1 ± HDAC6 inhibitors (Tubacin, Tubastatin, ACY1215, or MC1568), and fibrotic markers such as type I collagen were assessed using qRT-PCR and immunoblots...
2017: PloS One
https://www.readbyqxmd.com/read/29044959/a-general-strategy-assisted-with-dual-reductants-and-dual-protecting-agents-for-preparing-pt-based-alloys-with-high-index-facets-and-excellent-electrocatalytic-performance
#17
Chenglong Luan, Qing-Xiang Zhou, Yao Wang, Yun Xiao, Xiaoping Dai, Xing-Liang Huang, Xin Zhang
Synthesizing noble metallic nanoparticles (NPs) enclosed by high-index facets (HIFs) is challenged as it involves the tuning of growth kinetics, the selective adsorption of certain chemical species, and the epitaxial growth from HIF enclosed seeds. Herein, a simple and general strategy is reported by using dual reduction agents and dual capping agents to prepare Pt-based alloy NPs with HIFs, in which both glycine and poly(vinylpyrrolidone) serve as the reductants and capping agents. Due to the facilely tunable growth/nucleation rates and protecting abilities of the reductants and capping agents, Pt concave nanocube (CNC), binary Pt-Ni CNC, ternary Pt-Mn-Cu CNC, and Pt-Mn-Cu ramiform polyhedron alloy NPs terminated by HIFs as well as other NPs with well-defined morphologies such as Pt-Mn-Cu nanocube and Pt-Mn-Cu nanoflower are obtained with this approach...
October 16, 2017: Small
https://www.readbyqxmd.com/read/29044946/aquaporin-1-inhibition-reduces-metastatic-formation-in-a-mouse-model-of-melanoma
#18
Laura Simone, Concetta Domenica Gargano, Francesco Pisani, Antonio Cibelli, Maria Grazia Mola, Antonio Frigeri, Maria Svelto, Grazia Paola Nicchia
Aquaporin-1 (AQP1) is a proangiogenic water channel protein promoting endothelial cell migration. We previously reported that AQP1 silencing by RNA interference reduces angiogenesis-dependent primary tumour growth in a mouse model of melanoma. In this study, we tested the hypothesis that AQP1 inhibition also affects animal survival and lung nodule formation. Melanoma was induced by injecting B16F10 cells into the back of C57BL6J mice. Intratumoural injection of AQP1 siRNA and CTRL siRNA was performed 10 days after tumour cell implantation...
October 17, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29042275/basil-polysaccharide-attenuates-hepatocellular-carcinoma-metastasis-in-rat-by-suppressing-h3k9me2-histone-methylation-under-hepatic-artery-ligation-induced-hypoxia
#19
Bing Feng, Ying Zhu, Zuqing Su, Lipeng Tang, Chaoyue Sun, Caiyun Li, Guangjuan Zheng
Hepatocellular carcinoma (HCC) is one of the most common and fatal cancers in the world. Tumor metastasis is an important factor of poor prognosis in patients with HCC. Tumor hypoxia can promote tumor cell metastasis in HCC. Epigenetic modification is closely related to tumor hypoxia and metastasis. In our previous research, we found that basil polysaccharide suppressed migration and invasion of HCC cell by inhibiting hypoxia induced histone methylation in vitro. In the present study, we investigated the effect of basil polysaccharide on the walker 256 carcinoma cell metastasis in rat...
October 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29042175/calcitriol-promotes-proangiogenic-molecules-in-keratinocytes-in-a-diabetic-foot-ulcer-model
#20
Valentin Trujillo, Paulina Marín-Luevano, Irma González-Curiel, Adrián Rodríguez-Carlos, Maira Ramírez-Reyes, Esther Layseca-Espinosa, José A Enciso-Moreno, Lorenza Díaz, Bruno Rivas-Santiago
Foot ulceration is one of the most common and complex sequelae of diabetes mellitus, generally posing a therapeutic challenge due to poor healing responses and high rates of complications, including peripheral vascular disease, ischemia and infections. Calcitriol, the most active vitamin D metabolite, induces antimicrobial peptides production in keratinocytes from diabetic foot ulcers (DFU); however, little is known about its effects on angiogenic factors in this pathology. Herein we aimed at studying whether calcitriol induces angiogenic molecules in keratinocytes under normoxic and hypoxic conditions, and if these molecules are able to improve cell migration in vitro...
October 14, 2017: Journal of Steroid Biochemistry and Molecular Biology
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