223 results match your criteria: "Karolinska Institutet at Karolinska University Hospital-Huddinge[Affiliation]"

A novel allele HLA-C*08:80 differs from HLA-C*08:01:01:01 by one nucleotide substitution at position 142.

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Genetic depletion of Soat2 diminishes hepatic steatosis via genes regulating de novo lipogenesis and by GLUT2 protein in female mice.

Dig Liver Dis

July 2019

Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden; Metabolism Unit, Department of Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden; Patient Area Nephrology and Endocrinology, Inflammation and Infection Theme, Karolinska University Hospital, Stockholm, Sweden. Electronic address:

Depletion of the cholesterol esterifying enzyme acyl-Coenzyme A: cholesterol acyltransferase 2 (ACAT2, encoded by Soat2) protects mice from atherosclerosis, diet-induced hypercholesterolemia, and hepatic steatosis when fed high-cholesterol diet. The glucose transporter 2 (GLUT2) represents the main gate of glucose uptake by the liver. Lipid synthesis from glucose (de novo lipogenesis; DNL) plays a pivotal role in the development of hepatic steatosis.

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Background: Atypical X-linked severe combined immunodeficiency (X-SCID) is a variant of cellular immunodeficiency due to hypomorphic mutations in the interleukin 2 receptor gamma () gene. Due to a leaky clinical phenotype, diagnosis and appropriate treatment are challenging in these patients.

Case Presentation: We report a 16-year-old patient with a T B NK cellular immunodeficiency due to a novel nonsense mutation in exon 8 (p.

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Background In randomized trials (SHARP [Study of Heart and Renal Protection], IMPROVE -IT [Improved Reduction of Outcomes: Vytorin Efficacy International Trial]), combination of statin and ezetimibe resulted in additional reduction of cardiovascular events. The reduction was greater in patients with type 2 diabetes mellitus (T2 DM ), where elevated remnant cholesterol and high cardiovascular disease risk is characteristic. To evaluate possible causes behind these results, 40 patients eligible for cholecystectomy, randomized to simvastatin, ezetimibe, combined treatment (simvastatin+ezetimibe), or placebo treatment during 4 weeks before surgery, were studied.

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ERβ activation in obesity improves whole body metabolism via adipose tissue function and enhanced mitochondria biogenesis.

Mol Cell Endocrinol

January 2019

Department of Biosciences and Nutrition Huddinge, Karolinska Institutet, Sweden; Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signalling, University of Houston, Houston, TX, USA.

Objective: Estrogens play a key role in the distribution of adipose tissue and have their action by binding to both estrogen receptors (ER), α and β. Although ERβ has a role in the energy metabolism, limited data of the physiological mechanism and metabolic response involved in the pharmacological activation of ERβ is available.

Methods: For clinical relevance, non-ovariectomized female mice were subjected to high fat diet together with pharmacological (DIP - 4-(2-(3,5-dimethylisoxazol-4-yl)-1H-indol-3-yl)phenol) interventions to ERβ selective activation.

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Understanding Podocyte Biology to Develop Novel Kidney Therapeutics.

Front Endocrinol (Lausanne)

July 2018

Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Center, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden.

Over the past two decades it has become increasing clear that injury and loss of podocytes is an early and common clinical observation presented in many forms of glomerulopathy and chronic kidney disease. Identification of disease-causing monogenic mutations in numerous podocyte-expressed genes as well as studies conducted using preclinical animal models have shown that the podocyte plays a central role in establishing kidney dysfunction. In this review, we summarize current knowledge regarding the potential for podocyte-targeted therapies and give our view on how a deeper understanding of the molecular makeup of the podocyte will enable future therapeutic interventions.

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Development of physiologically relevant cellular models with strong translatability to human pathophysiology is critical for identification and validation of novel therapeutic targets. Herein we describe a detailed protocol for generation of an advanced 3-dimensional kidney cellular model using induced pluripotent stem cells, where differentiation and maturation of kidney progenitors and podocytes can be monitored in live cells due to CRISPR/Cas9-mediated fluorescent tagging of kidney lineage markers (SIX2 and NPHS1). Utilizing these cell lines, we have refined the previously published procedures to generate a new, higher throughput protocol suitable for drug discovery.

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Background And Objectives: Bile acids (BAs) traversing the enterohepatic circulation (EHC) influence important metabolic pathways. By determining individual serum BAs in relation to markers of metabolic activity, we explored how diurnal variations in their EHC relate to hepatic metabolism in normal humans.

Methods: Serum BAs, fibroblast growth factor 19 (FGF19), lipoproteins, glucose/insulin and markers of cholesterol and BA syntheses were monitored for 32 h in 8 healthy males.

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Background: AnWj is a high-incidence blood group antigen associated with three clinical disorders: lymphoid malignancies, immunologic disorders, and autoimmune hemolytic anemia. The aim of this study was to determine the genetic basis of an inherited AnWj-negative phenotype.

Methods: We identified a consanguineous family with two AnWj-negative siblings and 4 additional AnWj-negative individuals without known familial relationship to the index family.

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An FXR Agonist Reduces Bile Acid Synthesis Independently of Increases in FGF19 in Healthy Volunteers.

Gastroenterology

October 2018

Metabolism Unit and Integrated Cardio Metabolic Center, Department of Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden. Electronic address:

Bile acid (BA) synthesis is regulated through suppression of hepatic cholesterol 7α-hydroxylase via farnesoid X receptor (FXR) activation in hepatocytes and/or enterocytes; in enterocytes, this process requires FGF19 signaling. To study these pathways, we quantified markers of BA synthesis (7α-hydroxy-4-cholesten-3-one [C4]) and cholesterol production (lathosterol), fibroblast growth factor (FGF)19, and BAs in serum from healthy male volunteers given 1 oral dose of the nonsteroidal FXR agonist Px-102 (0.15 mg/kg, 0.

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Purpose: The etiology of 80% of patients with primary antibody deficiency (PAD), the second most common type of human immune system disorder after human immunodeficiency virus infection, is yet unknown.

Methods: Clinical/immunological phenotyping and exome sequencing of a cohort of 126 PAD patients (55.5% male, 95.

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Depletion of Gprc5a Promotes Development of Diabetic Nephropathy.

J Am Soc Nephrol

June 2018

Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Center, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden;

Renal glomeruli are the primary target of injury in diabetic nephropathy (DN), and the glomerular podocyte has a key role in disease progression. To identify potential novel therapeutic targets for DN, we performed high-throughput molecular profiling of G protein-coupled receptors (GPCRs) using human glomeruli. We identified an orphan GPCR, Gprc5a, as a highly podocyte-specific gene, the expression of which was significantly downregulated in glomeruli of patients with DN compared with those without DN.

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Purpose: Introduction of the direct-acting antivirals (DAAs) for treatment of chronic hepatitis C (CHC) infection has been challenging in all health systems. In Sweden, a national protocol for managed introduction was developed. It was optional, but all county councils agreed to implement and follow it.

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The kidney ultrafiltration barrier is formed of endothelial cells, the glomerular basement membrane and podocytes. Podocytes have a central role in normal physiology and disease pathogenesis of the glomerulus. Signaling through epidermal growth factor receptor (EGFR) in podocytes mediates development of many glomerular disease processes.

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Background: Involving patients in decisions about their pharmacotherapy is crucial for a satisfactory treatment outcome. Information and opinions about medicines are available from a variety of sources. The Wise List is the drug formulary of recommended essential medicines for the Stockholm healthcare region and is issued by the Drug and Therapeutics Committee (DTC).

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Human primary hepatocytes are the gold standard for investigating lipid metabolism in nonalcoholic fatty liver disease (NAFLD); however, due to limitations including availability and donor variability, the hepatoma cell lines Huh7 and HepG2 are commonly used. Culturing these cell lines in human serum (HS) has been reported to improve functionality; however, direct comparison of fatty acid (FA) metabolism in response to culturing in HS is lacking. The aim of this study was to compare FA metabolism between HepG2 and Huh7 cells in response to culturing in different sera.

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Confocal super-resolution imaging of the glomerular filtration barrier enabled by tissue expansion.

Kidney Int

April 2018

Science for Life Laboratory, Department of Applied Physics, Royal Institute of Technology, Solna, Sweden; Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, Solna, Sweden. Electronic address:

The glomerular filtration barrier, has historically only been spatially resolved using electron microscopy due to the nanometer-scale dimensions of these structures. Recently, it was shown that the nanoscale distribution of proteins in the slit diaphragm can be resolved by fluorescence based stimulated emission depletion microscopy, in combination with optical clearing. Fluorescence microscopy has advantages over electron microscopy in terms of multiplex imaging of different epitopes, and also the amount of volumetric data that can be extracted from thicker samples.

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Background & Aims: Several studies have shown that chronic hepatitis C (CHC) infection has a negative impact on kidney function, as well as survival, in patients with chronic kidney disease (CKD) or on hemodialysis. The aim of this nationwide registry study was to describe renal disease in Swedish patients with CHC.

Methods: In the present study, patients were identified for CHC (B18.

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Novel genetic loci associated HLA-B*08:01 positive myasthenia gravis.

J Autoimmun

March 2018

Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, SE-14186, Stockholm, Sweden; BGI-Shenzhen, Shenzhen, China, China National GeneBank-Shenzhen, 518083, Shenzhen, China.

Objective: To identify potential causative markers involved in the development of early-onset myasthenia gravis (EOMG) in the MHC and non-MHC regions that may interact with the HLA-B*08:01 allele.

Methods: We analyzed 583 MG patients and identified 5 patients homozygous for the disease-associated ancestral haplotype 8.1 (HLA-A*01:01, B*08:01, DRB1*03:01, DQB1*02:01).

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Lactobacillus rhamnosus DSM 14870 and Lactobacillus gasseri DSM 14869 were previously isolated from the vaginal epithelial cells (VEC) of healthy women and selected for the development of the vaginal EcoVag probiotic capsules. EcoVag was subsequently shown to provide long-term cure and reduce relapse of bacterial vaginosis (BV) as an adjunct to antibiotic therapy. To identify genes potentially involved in probiotic activity, we performed genome sequencing and characterization of the two strains.

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Lactobacillus delivery of bioactive interleukin-22.

Microb Cell Fact

August 2017

Division of Clinical Immunology and Transfusion Medicine, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, 141 86, Stockholm, Sweden.

Background: Interleukin-22 (IL-22) plays a prominent role in epithelial regeneration and dampening of chronic inflammatory responses by protecting intestinal stem cells from immune-mediated tissue damage. IL-22 has a considerable therapeutic potential in graft-versus-host disease (GVHD), which is a frequent and challenging complication following allogeneic stem cell transplantation. The aim of our study was to engineer Lactobacillus for delivery of IL-22 directly to the intestinal mucosa as a new therapeutic strategy for GVHD.

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A Comparison of Clinical and Immunologic Phenotypes in Familial and Sporadic Forms of Common Variable Immunodeficiency.

Scand J Immunol

October 2017

Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran.

Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immunodeficiency disease, and its prevalence varies significantly among different population. Minority of CVID patients present a familial aggregation suggesting a higher probability of heritable genetic defects. A total of 235 registered CVID patients were evaluated in this cohort study.

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Isolation of Kupffer Cells and Hepatocytes from a Single Mouse Liver.

Methods Mol Biol

April 2018

Department of Medicine, Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Center, Karolinska Institutet at Karolinska University Hospital Huddinge, 141 57, Stockholm, Sweden.

Liver perfusion is a common technique used to isolate parenchymal and non-parenchymal liver cells for in vitro experiments. This method allows hepatic cells to be separated based on their size and weight, by centrifugation using a density gradient. To date, other methods allow the isolation of only one viable hepatic cellular fraction from a single mouse; either parenchymal (hepatocytes) or non-parenchymal cells (i.

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Infectious and Noninfectious Pulmonary Complications in Patients With Primary Immunodeficiency Disorders.

J Investig Allergol Clin Immunol

August 2017

Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.

Primary immunodeficiency disorders (PIDs) are caused by 1 or more defects of the immune system. Patients are more likely to experience recurrent and/or severe infections and tend to develop a wide range of complications. Respiratory diseases are the main and initial manifestation in most cases and the most common complication.

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Non-homologous end-joining (NHEJ) is a pathway that repairs double-strand breaks (DSB) in DNA and plays a vital role in V(D)J recombination of immunoglobulin genes. Cernunnos is a DNA repair factor that is involved in nonhomologous end-joining (NHEJ) process. Impairment in Cernunnos leads to a genetic disease characterized by neural disorders, immunodeficiency and increased radiosensitivity.

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