1,483 results match your criteria Cyclooxygenase Deficiency

Metabolipidomic profiling reveals an age-related deficiency of skeletal muscle pro-resolving mediators that contributes to maladaptive tissue remodeling.

Aging Cell 2021 06 2;20(6):e13393. Epub 2021 Jun 2.

Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA.

Specialized pro-resolving mediators actively limit inflammation and support tissue regeneration, but their role in age-related muscle dysfunction has not been explored. We profiled the mediator lipidome of aging muscle via liquid chromatography-tandem mass spectrometry and tested whether treatment with the pro-resolving mediator resolvin D1 (RvD1) could rejuvenate the regenerative ability of aged muscle. Aged mice displayed chronic muscle inflammation and this was associated with a basal deficiency of pro-resolving mediators 8-oxo-RvD1, resolvin E3, and maresin 1, as well as many anti-inflammatory cytochrome P450-derived lipid epoxides. Read More

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Vitamin D stimulates miR-26b-5p to inhibit placental COX-2 expression in preeclampsia.

Sci Rep 2021 May 27;11(1):11168. Epub 2021 May 27.

Department of Physiology, Harbin Medical University, Harbin, 150081, China.

Vitamin D insufficiency or deficiency during pregnancy has been associated with an increased risk of preeclampsia. Increased placental cyclooxygenase-2 (COX-2) activity was proposed to contribute to the inflammatory response in preeclampsia. This study was to investigate if vitamin D can benefit preeclampsia by inhibiting placental COX-2 expression. Read More

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[Effect of Dendrobium officinale superfine powder on stomach Yin deficiency model mice induced by "spicy overeating"].

Zhongguo Zhong Yao Za Zhi 2021 Apr;46(7):1651-1657

Zhejiang Chinese Medical University Hangzhou 310053, China.

Dendrobium officinale is a traditional Chinese medicine for nourishing Yin and benefiting stomach. Its superfine powder has many advantages, such as good dissolution, high utilization rate, strong integrity and easy to use. However, the researches on effect of D. Read More

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Disentangling the Molecular Mechanisms of the Antidepressant Activity of Omega-3 Polyunsaturated Fatty Acid: A Comprehensive Review of the Literature.

Int J Mol Sci 2021 Apr 22;22(9). Epub 2021 Apr 22.

Child and Adolescent Psychiatry Research Centre, Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital, University of Zurich, CH-8032 Zurich, Switzerland.

Major depressive disorders (MDDs) are often associated with a deficiency in long-chain omega-3 polyunsaturated fatty acids (ω-3 PUFAs), as well as signs of low-grade inflammation. Epidemiological and dietary studies suggest that a high intake of fish, the major source of ω-3 PUFAs, is associated with lower rates of MDDs. Meta-analyses of randomized placebo-controlled ω-3 PUFAs intervention-trials suggest that primarily eicosapentaenoic acid (EPA), but not docosahexaenoic acid (DHA), is responsible for the proposed antidepressant effect. Read More

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Ergostatrien-3β-ol (EK100) from Attenuates Oxidative Stress, Inflammation, and Liver Injury and .

Prev Nutr Food Sci 2021 Mar;26(1):58-66

Institute of Food Science and Technology, Taipei 106, Taiwan.

Hepatic ischemia/reperfusion (IR) injury is a complication that occurs during liver surgery, whereby hepatic tissue is injured by oxygen deficiency during ischemia, then further damaged by a cascade of inflammatory and oxidative insults when blood is resupplied during reperfusion. is an indigenous fungus in Taiwan and an esteemed Chinese herbal medicine with various bioactivities. This study examined the effect of ergostatrien-3β-ol (EK100), an active compound found in both the fruiting body and mycelia of , on IR injury pathologies in rats and cell models of oxidative and inflammatory stress. Read More

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Gene Deletion of Microsomal Prostaglandin E Synthase-1 Suppresses Chemically Induced Skin Carcinogenesis.

Anticancer Res 2021 Mar;41(3):1307-1314

Division of Health Chemistry, Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, Tokyo, Japan

Background/aim: Microsomal prostaglandin (PG) E synthase-1 (mPGES-1) is a terminal enzyme in PGE synthesis and highly expressed in several cancers. In this study, to reveal the involvement of mPGES-1 in skin carcinogenesis, the effect of mPGES-1 deficiency on two-stage skin carcinogenesis in mice was investigated.

Materials And Methods: A two-stage skin carcinogenesis model using 7,12-dimethylbenz[a]anthracene (DMBA) as an initiator and 12-O-tetradecanoylphorbol-13-acetate (TPA) as a promoter was applied on mPGES-1 knockout (KO) mice and littermate wild-type mice of a Balb/c genetic background. Read More

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Vitamin D Deficiency Cause Gender Specific Alterations of Renal Arterial Function in a Rodent Model.

Nutrients 2021 Feb 22;13(2). Epub 2021 Feb 22.

Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary.

Vitamin D deficiency shows positive correlation to cardiovascular risk, which might be influenced by gender specific features. Our goal was to examine the effect of Vitamin D supplementation and Vitamin D deficiency in male and female rats on an important hypertension target organ, the renal artery. Female and male Wistar rats were fed with Vitamin D reduced chow for eight weeks to induce hypovitaminosis. Read More

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February 2021

Coordinated action of microsomal prostaglandin E synthase-1 and prostacyclin synthase on contact hypersensitivity.

Biochem Biophys Res Commun 2021 03 11;546:124-129. Epub 2021 Feb 11.

Division of Health Chemistry, Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, Tokyo, Japan. Electronic address:

Microsomal prostaglandin (PG) E synthase-1 (mPGES-1) and prostacyclin (PGI) synthase (PGIS) are PG terminal synthases that work downstream of cyclooxygenase and synthesize PGE and PGI, respectively. Although the involvement of PG receptors in acquired cutaneous immune responses was recently shown, the roles of these PG terminal synthases remain unclear. To identify the pathophysiological roles of mPGES-1 and PGIS in cutaneous immune systems, we applied contact hypersensitivity (CHS) to mPGES-1 and PGIS knockout (KO) mice as a model of acquired immune responses. Read More

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Corticotropin-Releasing Hormone Receptor Alters the Tumor Development and Growth in Mice and in a Chemically-Induced Model of Colon Cancer.

Int J Mol Sci 2021 Jan 21;22(3). Epub 2021 Jan 21.

Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA.

The neuroendocrine circuit of the corticotropin-releasing hormone (CRH) family peptides, via their cognate receptors CRHR1 and CRHR2, copes with psychological stress. However, peripheral effects of the CRH system in colon cancer remains elusive. Thus, we investigate the role of CRHR1 and CRHR2 in colon cancer. Read More

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January 2021

Maternal vitamin D deficiency influences long-chain polyunsaturated fatty acids and pregnancy outcome in association with alterations in one-carbon metabolism.

Nutr Res 2021 02 3;86:37-49. Epub 2020 Dec 3.

Mother and Child Health, Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth (Deemed to be University), Pune Satara Road, Pune 411043, India. Electronic address:

Preeclampsia is a pregnancy-specific disorder, leading to maternal and infant morbidity and mortality. Abnormal placentation has been reported in preeclampsia. Nutrients like vitamin D and long-chain polyunsaturated fatty acids (LCPUFA) are known to play a role in placental development. Read More

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February 2021

Trisomy 21 impairs PGE2 production in dermal fibroblasts.

Prostaglandins Other Lipid Mediat 2021 Apr 5;153:106524. Epub 2021 Jan 5.

Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, USA; Linda Crnic Institute for Down Syndrome, Aurora, Colorado, USA. Electronic address:

The triplication of human chromosome 21 results in Down syndrome (DS), the most common genetic form of intellectual disability. This aneuploid condition also results in an enhanced risk of a spectrum of comorbid conditions, such as leukemia, early onset Alzheimer's disease, and diabetes. Individuals with DS also display an increased incidence of wound healing complications and resistance to solid tumor development. Read More

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Involvement of prostacyclin synthase in high-fat-diet-induced obesity.

Prostaglandins Other Lipid Mediat 2021 Apr 28;153:106523. Epub 2020 Dec 28.

Division of Health Chemistry, Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, Tokyo, 142-8555, Japan. Electronic address:

Prostacyclin (PGI) synthase (PGIS) functions downstream of inducible cyclooxygenase COX-2 in the PGI biosynthetic pathway. Although COX-2 and PGI receptor (IP) are known to be involved in adipogenesis and obesity, the involvement of PGIS has not been fully elucidated. In this study, we examined the role of PGIS in adiposity by using PGIS-deficient mice. Read More

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Increased prostaglandin-D2 in male STAT3-deficient hearts shifts cardiac progenitor cells from endothelial to white adipocyte differentiation.

PLoS Biol 2020 12 28;18(12):e3000739. Epub 2020 Dec 28.

Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany.

Cardiac levels of the signal transducer and activator of transcription factor-3 (STAT3) decline with age, and male but not female mice with a cardiomyocyte-specific STAT3 deficiency conditional knockout (CKO) display premature age-related heart failure associated with reduced cardiac capillary density. In the present study, isolated male and female CKO-cardiomyocytes exhibit increased prostaglandin (PG)-generating cyclooxygenase-2 (COX-2) expression. The PG-degrading hydroxyprostaglandin-dehydrogenase-15 (HPGD) expression is only reduced in male cardiomyocytes, which is associated with increased prostaglandin D2 (PGD2) secretion from isolated male but not female CKO-cardiomyocytes. Read More

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December 2020

The role of annexin A1 in Candida albicans and Candida auris infections in murine neutrophils.

Microb Pathog 2021 Jan 8;150:104689. Epub 2020 Dec 8.

Departamento de Morfologia e Genética, Universidade Federal de São Paulo - UNIFESP, São Paulo, 04023-900, Brazil. Electronic address:

Annexin A1 (AnxA1) is an anti-inflammatory protein expressed in various cell types, especially macrophages and neutrophils. Because neutrophils play important roles in infections and inflammatory processes and the relationship between AnxA1 and Candida spp. infections is not well-understood, our study examined whether AnxA1 can serve as a target protein for the regulation of the immune response during fungal infections. Read More

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January 2021

Peripheral Myeloid Cell EP2 Activation Contributes to the Deleterious Consequences of Status Epilepticus.

J Neurosci 2021 02 8;41(5):1105-1117. Epub 2020 Dec 8.

Department of Pharmacology and Chemical Biology, Emory University School of Medicine, Atlanta, Georgia 30322.

A multidimensional inflammatory response ensues after status epilepticus (SE), driven partly by cyclooxygenase-2-mediated activation of prostaglandin EP2 receptors. The inflammatory response is typified by astrocytosis, microgliosis, erosion of the blood-brain barrier (BBB), formation of inflammatory cytokines, and brain infiltration of blood-borne monocytes. Our previous studies have shown that inhibition of monocyte brain invasion or systemic administration of an EP2 receptor antagonist relieves multiple deleterious consequences of SE. Read More

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February 2021

Relative Deficiency of Anti-Inflammatory -Acylethanolamines Compared to Prostaglandins in Oral Lichen Planus.

Biomedicines 2020 Nov 6;8(11). Epub 2020 Nov 6.

Department of Integrative Medical Biology, Faculty of Medicine, Umeå University, SE-901 87 Umeå, Sweden.

Oral lichen planus (OLP) is a chronic inflammatory oromucosal disease. The -acylethanolamines (NAEs), are a family of endogenous biologically active lipid mediators, with palmitoylethanolamide (PEA) being of particular interest here due to its anti-inflammatory and analgesic properties. In this study using oral mucosa biopsies from OLP patients and healthy controls, we investigated whether NAE synthesis was mobilized in response to the inflammation associated with OLP. Read More

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November 2020

Mechanisms of vascular dysfunction in the interleukin-10-deficient murine model of preeclampsia indicate nitric oxide dysregulation.

Kidney Int 2021 03 2;99(3):646-656. Epub 2020 Nov 2.

Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA; Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, Minnesota, USA. Electronic address:

Preeclampsia is a pregnancy-specific hypertensive disorder characterized by proteinuria, and vascular injury in the second half of pregnancy. We hypothesized that endothelium-dependent vascular dysfunction is present in a murine model of preeclampsia based on administration of human preeclamptic sera to interleukin-10-/- mice and studied mechanisms that underlie vascular injury. Pregnant wild type and IL-10-/- mice were injected with either normotensive or severe preeclamptic patient sera (sPE) during gestation. Read More

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Guttiferone K Exerts the Anti-inflammatory Effect on Mycobacterium Tuberculosis- (H37Ra-) Infected Macrophages by Targeting the TLR/IRAK-1 Mediated Akt and NF-B Pathway.

Mediators Inflamm 2020 10;2020:8528901. Epub 2020 Oct 10.

Center for Traditional Chinese Medicine and Immunology Research, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, 201203 Shanghai, China.

(Mtb) remains a great threat to global health, killing more people than any other single infectious agent and causing uncontrollable inflammation in the host. Poorly controlled inflammatory processes can be deleterious and result in immune exhaustion. The current tuberculosis (TB) control is facing the challenge of drugs deficiency, especially in the context of increasingly multidrug resistant (MDR) TB. Read More

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October 2020

Endothelial epithelial sodium channel involves in high-fat diet-induced atherosclerosis in low-density lipoprotein receptor-deficient mice.

Biochim Biophys Acta Mol Basis Dis 2021 01 13;1867(1):165989. Epub 2020 Oct 13.

Departments of Clinical Pharmacy and Cardiology, Harbin Medical University Cancer Hospital, Institute of Metabolic Disease, Heilongjiang Academy of Medical Science, Key Laboratories of Education Ministry for Myocardial Ischemia Mechanism and Treatment, Harbin, 150081, China. Electronic address:

We previously showed that increased epithelial sodium channel (ENaC) activity in endothelial cells induced by oxidized low-density lipoprotein (ox-LDL) contributes to vasculature dysfunction. Here, we investigated whether ENaC participates in the pathological process of atherosclerosis using LDL receptor-deficient (LDLr) mice. Male C57BL/6 and LDLr mice were fed a normal diet (ND) or high fat diet (HFD) for 10 weeks. Read More

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January 2021

Genetic Deletion or Pharmacological Inhibition of Cyclooxygenase-2 Reduces Blood-Brain Barrier Damage in Experimental Ischemic Stroke.

Front Neurol 2020 20;11:887. Epub 2020 Aug 20.

Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL, United States.

Cyclooxygenase (COX)-2 and matrix metalloproteinase (MMP)-9 are two crucial mediators contributing to blood-brain barrier (BBB) damage during cerebral ischemia. However, it is not known whether MMP-9 activation is involved in COX-2-mediated BBB disruption in ischemic stroke. In this study, we hypothesized that genetic deletion or pharmacological inhibition of COX-2 reduces BBB damage by reducing MMP-9 activity in a mouse model of ischemic stroke. Read More

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The CRISPR-Cas9 crATIC HeLa transcriptome: Characterization of a novel cellular model of ATIC deficiency and ZMP accumulation.

Mol Genet Metab Rep 2020 Dec 2;25:100642. Epub 2020 Sep 2.

Knoebel Institute for Healthy Aging, University of Denver, 2155 E. Wesley Avenue, Denver, CO 80210, USA.

In de novo purine biosynthesis (DNPS), 5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase (EC 2.1.2. Read More

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December 2020

MiR-196-5p involvement in selenium deficiency-induced immune damage via targeting of NFκBIA in the chicken trachea.

Metallomics 2020 11 10;12(11):1679-1692. Epub 2020 Sep 10.

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China.

Dietary selenium (Se) deficiency can induce multifarious immune injury in tissues, accompanied by inflammation and a decreased expression of selenoproteins. The results of previous studies indicated that these issues are associated with Se-mediated microRNAs involved in immune regulation, although the specific mechanisms associated with these interactions have not been reported in the trachea of chickens. To explore the effects of Se deficiency in the trachea of chickens and the role of miR-196-5p, we established correlational models of tracheal injury in chickens. Read More

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November 2020

Deficiency of the SMOC2 matricellular protein impairs bone healing and produces age-dependent bone loss.

Sci Rep 2020 09 9;10(1):14817. Epub 2020 Sep 9.

Developmental Biology and Stem Cells Department, Institute of Genetics and of Molecular and Cellular Biology (IGBMC), 1 rue Laurent Fries, BP 10142, 67404, Illkirch, France.

Secreted extracellular matrix components which regulate craniofacial development could be reactivated and play roles in adult wound healing. We report a patient with a loss-of-function of the secreted matricellular protein SMOC2 (SPARC related modular calcium binding 2) presenting severe oligodontia, microdontia, tooth root deficiencies, alveolar bone hypoplasia, and a range of skeletal malformations. Turning to a mouse model, Smoc2-GFP reporter expression indicates SMOC2 dynamically marks a range of dental and bone progenitors. Read More

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September 2020

ROCK-II inhibition suppresses impaired mechanobiological responses in early estrogen deficient osteoblasts.

Exp Cell Res 2020 11 6;396(1):112264. Epub 2020 Sep 6.

Mechanobiology and Medical Device Research Group, Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics, National University of Ireland Galway, Galway, Ireland. Electronic address:

Mechanobiological responses by osteoblasts are governed by downstream Rho-ROCK signalling through actin cytoskeleton re-arrangements but whether these responses are influenced by estrogen deficiency during osteoporosis remains unknown. The objective of this study was to determine alterations in the mechanobiological responses of estrogen-deficient osteoblasts and investigate whether an inhibitor of the Rho-ROCK signalling can revert these changes. MC3T3-E1 cells were pre-treated with 10 nM 17-β estradiol for 7 days and further cultured with or without estradiol for next 2 days. Read More

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November 2020

Se deficiency induces renal pathological changes by regulating selenoprotein expression, disrupting redox balance, and activating inflammation.

Metallomics 2020 10;12(10):1576-1584

State Key Laboratory of Animal Nutrition, Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing 100193, China. and Scientific Observing and Experiment Station of Animal Genetic Resources and Nutrition in North China of Ministry of Agriculture and Rural Affairs, Institute of Animal Sciences of Chinese Academy of Agricultural Sciences, Beijing 100193, China.

Selenium (Se) is closely associated with kidney disease, and renal injury often occurs together with hyposelenemia. This study was designed to reveal the mechanism underlying renal injury induced by Se deficiency in pigs. Twenty-four castrated male Yorkshire pigs were divided into two groups fed either a Se-deficient diet (0. Read More

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October 2020

Inflammation with the participation of arachidonic (AA) and linoleic acid (LA) derivatives (HETEs and HODEs) is necessary in the course of a normal reproductive cycle and pregnancy.

J Reprod Immunol 2020 09 7;141:103177. Epub 2020 Jul 7.

Department of Human Nutrition and Metabolomics, Pomeranian Medical University in Szczecin, Poland. Electronic address:

Data on arachidonic (AA) and linoleic (LA) acid derivatives and their role in the reproductive cycle are limited. In order to systematize these reports, 54 scientific investigations were analyzed, which revealed the important role of AA and LA in the planning and course of pregnancy. Ovulation, menstruation, pregnancy, and childbirth are strongly related to the occurrence of physiological inflammatory reactions. Read More

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September 2020

Toll-like receptor-9 (TLR-9) deficiency alleviates optic nerve injury (ONI) by inhibiting inflammatory response in vivo and in vitro.

Lu Zhang Xueying Li

Exp Cell Res 2020 11 9;396(1):112159. Epub 2020 Jul 9.

Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China. Electronic address:

Traumatic optic neuropathy is a common clinical problem. Damage to the optic nerve leads to shear stress and triggers secondary swelling within the optic canal. The study aims to explore the role of the inflammatory response following optic nerve injury (ONI) in toll-like receptor-9 knockout mice (TLR-9) compared to wild-type mice (WT). Read More

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November 2020

Loss of Collapsin Response Mediator Protein 4 Attenuates 6-Hydroxydopamine-Induced Impairments in a Mouse Model of Parkinson's Disease.

Neurochem Res 2020 Oct 9;45(10):2286-2301. Epub 2020 Jul 9.

Department of Life Science and Medical Bio-Science, Waseda University, 2-2 Wakamatsu-cho Shinjukuku, Tokyo, 162-8480, Japan.

Parkinson's disease (PD) is a chronic neurodegenerative disorder characterized by impaired motor symptoms induced by the degeneration of dopaminergic neurons of the substantia nigra pars compacta (SNc). Many factors are speculated to operate in the mechanism of PD, including oxidative stress, mitochondrial dysfunction, abnormal protein handling, and PD induced apoptosis. Besides, researchers have recently shown that inflammatory secretions may engage neighboring cells such as astrocytes, which then induce autocrine and paracrine responses that amplify the inflammation, leading to neurodegeneration. Read More

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October 2020

Extracellular Granzyme A Promotes Colorectal Cancer Development by Enhancing Gut Inflammation.

Cell Rep 2020 07;32(1):107847

Fundación Instituto de Investigación Sanitaria Aragón (IIS Aragón), Biomedical Research Centre of Aragon (CIBA), 50009 Zaragoza, Spain; Aragon I+D Foundation (ARAID), Zaragoza, Spain; Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain; Department Biochemistry and Molecular and Cell Biology and Department Microbiology, Preventive Medicine and Public Health, University of Zaragoza, 50009 Zaragoza, Spain; CIBER-BBN, Madrid, Spain. Electronic address:

If not properly regulated, the inflammatory immune response can promote carcinogenesis, as evident in colorectal cancer (CRC). Aiming to gain mechanistic insight into the link between inflammation and CRC, we perform transcriptomics analysis of human CRC, identifying a strong correlation between expression of the serine protease granzyme A (GzmA) and inflammation. In a dextran sodium sulfate and azoxymethane (DSS/AOM) mouse model, deficiency and pharmacological inhibition of extracellular GzmA both attenuate gut inflammation and prevent CRC development, including the initial steps of cell transformation and epithelial-to-mesenchymal transition. Read More

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