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Nakamura Y, Kulkarni NN, Takahashi T, Alimohamadi H, Dokoshi T, Liu E, Shia M, Numata T, Luo EW, Gombart AF, Yang X, Secrest P, Gordts PL, Tsimikas S, Wong GC, Gallo RL. Increased LL37 in psoriasis and other inflammatory disorders promotes LDL uptake and atherosclerosis. J Clin Invest 2024; 134:e172578. [PMID: 38194294 PMCID: PMC10904043 DOI: 10.1172/jci172578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024] Open
Abstract
Patients with chronic inflammatory disorders such as psoriasis have an increased risk of cardiovascular disease and elevated levels of LL37, a cathelicidin host defense peptide that has both antimicrobial and proinflammatory properties. To explore whether LL37 could contribute to the risk of heart disease, we examined its effects on lipoprotein metabolism and show that LL37 enhanced LDL uptake in macrophages through the LDL receptor (LDLR), scavenger receptor class B member 1 (SR-B1), and CD36. This interaction led to increased cytosolic cholesterol in macrophages and changes in expression of lipid metabolism genes consistent with increased cholesterol uptake. Structure-function analysis and synchrotron small-angle x-ray scattering showed structural determinants of the LL37-LDL complex that underlie its ability to bind its receptors and promote uptake. This function of LDL uptake is unique to cathelicidins from humans and some primates and was not observed with cathelicidins from mice or rabbits. Notably, Apoe-/- mice expressing LL37 developed larger atheroma plaques than did control mice, and a positive correlation between plasma LL37 and oxidized phospholipid on apolipoprotein B (OxPL-apoB) levels was observed in individuals with cardiovascular disease. These findings provide evidence that LDL uptake can be increased via interaction with LL37 and may explain the increased risk of cardiovascular disease associated with chronic inflammatory disorders.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Adrian F. Gombart
- Linus Pauling Institute, Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon, USA
| | | | - Patrick Secrest
- Department of Medicine, Division of Endocrinology and Metabolism, and
| | - Philip L.S.M. Gordts
- Department of Medicine, Division of Endocrinology and Metabolism, and
- Glycobiology Research and Training Center, UCSD, La Jolla, California, USA
| | | | - Gerard C.L. Wong
- Department of Bioengineering, UCLA, Los Angeles, California, USA
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2
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Yang X, Weber AA, Mennillo E, Secrest P, Chang M, Wong S, Le S, Liu J, Benner CW, Karin M, Gordts PL, Tukey RH, Chen S. Effects of Early Life Oral Arsenic Exposure on Intestinal Tract Development and Lipid Homeostasis in Neonatal Mice: Implications for NAFLD Development. Environ Health Perspect 2023; 131:97001. [PMID: 37668303 PMCID: PMC10478510 DOI: 10.1289/ehp12381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 05/01/2023] [Accepted: 07/11/2023] [Indexed: 09/06/2023]
Abstract
BACKGROUND Newborns can be exposed to inorganic arsenic (iAs) through contaminated drinking water, formula, and other infant foods. Epidemiological studies have demonstrated a positive association between urinary iAs levels and the risk of developing nonalcoholic fatty liver disease (NAFLD) among U.S. adolescents and adults. OBJECTIVES The present study examined how oral iAs administration to neonatal mice impacts the intestinal tract, which acts as an early mediator for NAFLD. METHODS Neonatal mice were treated with a single dose of iAs via oral gavage. Effects on the small intestine were determined by histological examination, RNA sequencing, and biochemical analysis. Serum lipid profiling was analyzed by fast protein liquid chromatography (FPLC), and hepatosteatosis was characterized histologically and biochemically. Liver X receptor-alpha (LXR α ) knockout (L x r α - / - ) mice and liver-specific activating transcription factor 4 (ATF4)-deficient (A t f 4 Δ H e p ) mice were used to define their roles in iAs-induced effects during the neonatal stage. RESULTS Neonatal mice exposed to iAs via oral gavage exhibited accumulation of dietary fat in enterocytes, with higher levels of enterocyte triglycerides and free fatty acids. These mice also showed accelerated enterocyte maturation and a longer small intestine. This was accompanied by higher levels of liver-derived very low-density lipoprotein and low-density lipoprotein triglycerides, and a lower level of high-density lipoprotein cholesterol in the serum. Mice exposed during the neonatal period to oral iAs also developed hepatosteatosis. Compared with the control group, iAs-induced fat accumulation in enterocytes became more significant in neonatal L x r α - / - mice, accompanied by accelerated intestinal growth, hypertriglyceridemia, and hepatosteatosis. In contrast, regardless of enterocyte fat accumulation, hepatosteatosis was largely reduced in iAs-treated neonatal A t f 4 Δ H e p mice. CONCLUSION Exposure to iAs in neonatal mice resulted in excessive accumulation of fat in enterocytes, disrupting lipid homeostasis in the serum and liver, revealing the importance of the gut-liver axis and endoplasmic reticulum stress in mediating iAs-induced NAFLD at an early age. https://doi.org/10.1289/EHP12381.
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Affiliation(s)
- Xiaojing Yang
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - André A. Weber
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - Elvira Mennillo
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - Patrick Secrest
- Department of Medicine, Division of Endocrinology and Metabolism, UC San Diego, La Jolla, California, USA
| | - Max Chang
- Department of Medicine, School of Medicine, UC San Diego, La Jolla, California, USA
| | - Samantha Wong
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - Sabrina Le
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - Junlai Liu
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, UC San Diego, La Jolla, California, USA
| | | | - Michael Karin
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, UC San Diego, La Jolla, California, USA
| | - Philip L.S.M. Gordts
- Department of Medicine, Division of Endocrinology and Metabolism, UC San Diego, La Jolla, California, USA
| | - Robert H. Tukey
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
| | - Shujuan Chen
- Laboratory of Environmental Toxicology, Department of Pharmacology, University of California, San Diego (UC San Diego), La Jolla, California, USA
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3
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DeForest N, Kavitha B, Hu S, Isaac R, Krohn L, Wang M, Du X, De Arruda Saldanha C, Gylys J, Merli E, Abagyan R, Najmi L, Mohan V, Flannick J, Peloso GM, Gordts PL, Heinz S, Deaton AM, Khera AV, Olefsky J, Radha V, Majithia AR. Human gain-of-function variants in HNF1A confer protection from diabetes but independently increase hepatic secretion of atherogenic lipoproteins. Cell Genom 2023; 3:100339. [PMID: 37492105 PMCID: PMC10363808 DOI: 10.1016/j.xgen.2023.100339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 02/08/2023] [Accepted: 05/03/2023] [Indexed: 07/27/2023]
Abstract
Loss-of-function mutations in hepatocyte nuclear factor 1A (HNF1A) are known to cause rare forms of diabetes and alter hepatic physiology through unclear mechanisms. In the general population, 1:100 individuals carry a rare, protein-coding HNF1A variant, most of unknown functional consequence. To characterize the full allelic series, we performed deep mutational scanning of 11,970 protein-coding HNF1A variants in human hepatocytes and clinical correlation with 553,246 exome-sequenced individuals. Surprisingly, we found that ∼1:5 rare protein-coding HNF1A variants in the general population cause molecular gain of function (GOF), increasing the transcriptional activity of HNF1A by up to 50% and conferring protection from type 2 diabetes (odds ratio [OR] = 0.77, p = 0.007). Increased hepatic expression of HNF1A promoted a pro-atherogenic serum profile mediated in part by enhanced transcription of risk genes including ANGPTL3 and PCSK9. In summary, ∼1:300 individuals carry a GOF variant in HNF1A that protects carriers from diabetes but enhances hepatic secretion of atherogenic lipoproteins.
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Affiliation(s)
- Natalie DeForest
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA, USA
| | - Babu Kavitha
- Department of Molecular Genetics, Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Affiliated with University of Madras, Chennai, India
| | - Siqi Hu
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Roi Isaac
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | | | - Minxian Wang
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Xiaomi Du
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Camila De Arruda Saldanha
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Jenny Gylys
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Edoardo Merli
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Ruben Abagyan
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Laeya Najmi
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Diabetes Research, Department of Clinical Science, University of Bergen, 5020 Bergen, Norway
| | - Viswanathan Mohan
- Department of Diabetology, Dr. Mohan’s Diabetes Specialties Centre (IDF Centre of Education) & Madras Diabetes Research Foundation (ICMR Centre for Advanced Research on Diabetes), Chennai, India
| | - Alnylam Human Genetics
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA, USA
- Department of Molecular Genetics, Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Affiliated with University of Madras, Chennai, India
- Alnylam Pharmaceuticals, Cambridge, MA, USA
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
- Center for Diabetes Research, Department of Clinical Science, University of Bergen, 5020 Bergen, Norway
- Department of Diabetology, Dr. Mohan’s Diabetes Specialties Centre (IDF Centre of Education) & Madras Diabetes Research Foundation (ICMR Centre for Advanced Research on Diabetes), Chennai, India
- Department of Pediatrics, Boston Children’s Hospital, Boston, MA, USA
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - AMP-T2D Consortium
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA, USA
- Department of Molecular Genetics, Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Affiliated with University of Madras, Chennai, India
- Alnylam Pharmaceuticals, Cambridge, MA, USA
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
- Center for Diabetes Research, Department of Clinical Science, University of Bergen, 5020 Bergen, Norway
- Department of Diabetology, Dr. Mohan’s Diabetes Specialties Centre (IDF Centre of Education) & Madras Diabetes Research Foundation (ICMR Centre for Advanced Research on Diabetes), Chennai, India
- Department of Pediatrics, Boston Children’s Hospital, Boston, MA, USA
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jason Flannick
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Pediatrics, Boston Children’s Hospital, Boston, MA, USA
| | - Gina M. Peloso
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Philip L.S.M. Gordts
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA
| | - Sven Heinz
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | | | - Amit V. Khera
- Programs in Metabolism and Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Jerrold Olefsky
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Venkatesan Radha
- Department of Molecular Genetics, Madras Diabetes Research Foundation, ICMR Centre for Advanced Research on Diabetes, Affiliated with University of Madras, Chennai, India
| | - Amit R. Majithia
- Division of Endocrinology, Department of Medicine, University of California San Diego, La Jolla, CA, USA
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Ramms B, Pollow DP, Zhu H, Nora C, Harrington AR, Omar I, Gordts PL, Wortham M, Sander M. Systemic LSD1 Inhibition Prevents Aberrant Remodeling of Metabolism in Obesity. Diabetes 2022; 71:2513-2529. [PMID: 36162056 PMCID: PMC9750949 DOI: 10.2337/db21-1131] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 09/06/2022] [Indexed: 01/11/2023]
Abstract
The transition from lean to obese states involves systemic metabolic remodeling that impacts insulin sensitivity, lipid partitioning, inflammation, and glycemic control. Here, we have taken a pharmacological approach to test the role of a nutrient-regulated chromatin modifier, lysine-specific demethylase (LSD1), in obesity-associated metabolic reprogramming. We show that systemic administration of an LSD1 inhibitor (GSK-LSD1) reduces food intake and body weight, ameliorates nonalcoholic fatty liver disease (NAFLD), and improves insulin sensitivity and glycemic control in mouse models of obesity. GSK-LSD1 has little effect on systemic metabolism of lean mice, suggesting that LSD1 has a context-dependent role in promoting maladaptive changes in obesity. In analysis of insulin target tissues we identified white adipose tissue as the major site of insulin sensitization by GSK-LSD1, where it reduces adipocyte inflammation and lipolysis. We demonstrate that GSK-LSD1 reverses NAFLD in a non-hepatocyte-autonomous manner, suggesting an indirect mechanism potentially via inhibition of adipocyte lipolysis and subsequent effects on lipid partitioning. Pair-feeding experiments further revealed that effects of GSK-LSD1 on hyperglycemia and NAFLD are not a consequence of reduced food intake and weight loss. These findings suggest that targeting LSD1 could be a strategy for treatment of obesity and its associated complications including type 2 diabetes and NAFLD.
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Affiliation(s)
- Bastian Ramms
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Dennis P. Pollow
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Han Zhu
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Chelsea Nora
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Austin R. Harrington
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Ibrahim Omar
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Philip L.S.M. Gordts
- Department of Medicine, University of California, San Diego, La Jolla, CA
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA
| | - Matthew Wortham
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
| | - Maike Sander
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California, San Diego, La Jolla, CA
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5
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Ramms B, Patel S, Sun X, Pessentheiner AR, Ducasa GM, Mullick AE, Lee RG, Crooke RM, Tsimikas S, Witztum JL, Gordts PL. Interventional hepatic apoC-III knockdown improves atherosclerotic plaque stability and remodeling by triglyceride lowering. JCI Insight 2022; 7:e158414. [PMID: 35653195 PMCID: PMC9310539 DOI: 10.1172/jci.insight.158414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 06/01/2022] [Indexed: 11/17/2022] Open
Abstract
Apolipoprotein C-III (apoC-III) is a critical regulator of triglyceride metabolism and correlates positively with hypertriglyceridemia and cardiovascular disease (CVD). It remains unclear if therapeutic apoC-III lowering reduces CVD risk and if the CVD correlation depends on the lipid-lowering or antiinflammatory properties. We determined the impact of interventional apoC-III lowering on atherogenesis using an apoC-III antisense oligonucleotide (ASO) in 2 hypertriglyceridemic mouse models where the intervention lowers plasma triglycerides and in a third lipid-refractory model. On a high-cholesterol Western diet apoC-III ASO treatment did not alter atherosclerotic lesion size but did attenuate advanced and unstable plaque development in the triglyceride-responsive mouse models. No lesion size or composition improvement was observed with apoC-III ASO in the lipid-refractory mice. To circumvent confounding effects of continuous high-cholesterol feeding, we tested the impact of interventional apoC-III lowering when switching to a cholesterol-poor diet after 12 weeks of Western diet. In this diet switch regimen, apoC-III ASO treatment significantly reduced plasma triglycerides, atherosclerotic lesion progression, and necrotic core area and increased fibrous cap thickness in lipid-responsive mice. Again, apoC-III ASO treatment did not alter triglyceride levels, lesion development, and lesion composition in lipid-refractory mice after the diet switch. Our findings suggest that interventional apoC-III lowering might be an effective strategy to reduce atherosclerosis lesion size and improve plaque stability when lipid lowering is achieved.
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Affiliation(s)
- Bastian Ramms
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
- Department of Chemistry, Biochemistry I, Bielefeld University, Bielefeld, Germany
| | - Sohan Patel
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Xiaoli Sun
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
- Department of Pharmacology, Mays Cancer Center, Transplant Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | | | - G. Michelle Ducasa
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | | | | | | | - Sotirios Tsimikas
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
- Ionis Pharmaceuticals, Carlsbad, California, USA
| | - Joseph L. Witztum
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
| | - Philip L.S.M. Gordts
- Department of Medicine, University of California, San Diego, La Jolla, California, USA
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California, USA
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6
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Kawanishi K, Coker JK, Grunddal KV, Dhar C, Hsiao J, Zengler K, Varki N, Varki A, Gordts PL. Dietary Neu5Ac Intervention Protects Against Atherosclerosis Associated With Human-Like Neu5Gc Loss-Brief Report. Arterioscler Thromb Vasc Biol 2021; 41:2730-2739. [PMID: 34587757 PMCID: PMC8551057 DOI: 10.1161/atvbaha.120.315280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 08/09/2021] [Indexed: 02/06/2023]
Abstract
Objective Species-specific pseudogenization of the CMAH gene during human evolution eliminated common mammalian sialic acid N-glycolylneuraminic acid (Neu5Gc) biosynthesis from its precursor N-acetylneuraminic acid (Neu5Ac). With metabolic nonhuman Neu5Gc incorporation into endothelia from red meat, the major dietary source, anti-Neu5Gc antibodies appeared. Human-like Ldlr-/-Cmah-/- mice on a high-fat diet supplemented with a Neu5Gc-enriched mucin, to mimic human red meat consumption, suffered increased atherosclerosis if human-like anti-Neu5Gc antibodies were elicited. Approach and Results We now ask whether interventional Neu5Ac feeding attenuates metabolically incorporated Neu5Gc-mediated inflammatory acceleration of atherogenesis in this Cmah-/-Ldlr-/- model system. Switching to a Neu5Gc-free high-fat diet or adding a 5-fold excess of Collocalia mucoid-derived Neu5Ac in high-fat diet protects against accelerated atherosclerosis. Switching completely from a Neu5Gc-rich to a Neu5Ac-rich diet further reduces severity. Remarkably, feeding Neu5Ac-enriched high-fat diet alone has a substantial intrinsic protective effect against atherosclerosis in Ldlr-/- mice even in the absence of dietary Neu5Gc but only in the human-like Cmah-null background. Conclusions Interventional Neu5Ac feeding can mitigate or prevent the red meat/Neu5Gc-mediated increased risk for atherosclerosis, and has an intrinsic protective effect, even in the absence of Neu5Gc feeding. These findings suggest that similar interventions should be tried in humans and that Neu5Ac-enriched diets alone should also be investigated further.
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Affiliation(s)
- Kunio Kawanishi
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla
- Department of Experimental Pathology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Joanna K Coker
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Medicine, University of California, San Diego, La Jolla
- Department of Pediatrics, University of California, San Diego, La Jolla
| | - Kaare V. Grunddal
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Medicine, University of California, San Diego, La Jolla
| | - Chirag Dhar
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla
| | - Jason Hsiao
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Medicine, University of California, San Diego, La Jolla
| | - Karsten Zengler
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Pediatrics, University of California, San Diego, La Jolla
- Department of Bioengineering, University of California, San Diego, La Jolla
- Center for Microbiome Innovation, University of California, San Diego, La Jolla
| | - Nissi Varki
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Bioengineering, University of California, San Diego, La Jolla
| | - Ajit Varki
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla
- Department of Medicine, University of California, San Diego, La Jolla
- Center for Academic Research and Training in Anthropogeny, University of California, San Diego, La Jolla
| | - Philip L.S.M. Gordts
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla
- Department of Medicine, University of California, San Diego, La Jolla
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7
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Weiss RJ, Spahn PN, Chiang AW, Liu Q, Li J, Hamill KM, Rother S, Clausen TM, Hoeksema MA, Timm BM, Godula K, Glass CK, Tor Y, Gordts PL, Lewis NE, Esko JD. Genome-wide screens uncover KDM2B as a modifier of protein binding to heparan sulfate. Nat Chem Biol 2021; 17:684-692. [PMID: 33846619 PMCID: PMC8159865 DOI: 10.1038/s41589-021-00776-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 02/18/2021] [Indexed: 02/01/2023]
Abstract
Heparan sulfate (HS) proteoglycans bind extracellular proteins that participate in cell signaling, attachment and endocytosis. These interactions depend on the arrangement of sulfated sugars in the HS chains generated by well-characterized biosynthetic enzymes; however, the regulation of these enzymes is largely unknown. We conducted genome-wide CRISPR-Cas9 screens with a small-molecule ligand that binds to HS. Screening of A375 melanoma cells uncovered additional genes and pathways impacting HS formation. The top hit was the epigenetic factor KDM2B, a histone demethylase. KDM2B inactivation suppressed multiple HS sulfotransferases and upregulated the sulfatase SULF1. These changes differentially affected the interaction of HS-binding proteins. KDM2B-deficient cells displayed decreased growth rates, which was rescued by SULF1 inactivation. In addition, KDM2B deficiency altered the expression of many extracellular matrix genes. Thus, KDM2B controls proliferation of A375 cells through the regulation of HS structure and serves as a master regulator of the extracellular matrix.
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Affiliation(s)
- Ryan J. Weiss
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Philipp N. Spahn
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
| | - Austin W.T. Chiang
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
| | - Qing Liu
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Jing Li
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Kristina M. Hamill
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA
| | - Sandra Rother
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Thomas M. Clausen
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA,Department for Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen and Department of Infectious Disease, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Marten A. Hoeksema
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Bryce M. Timm
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA
| | - Kamil Godula
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA,Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA
| | - Christopher K. Glass
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA,Department of Medicine, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Yitzhak Tor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA,Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA
| | - Philip L.S.M. Gordts
- Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA,Department of Medicine, Copenhagen University Hospital, 2200 Copenhagen, Denmark
| | - Nathan E. Lewis
- Department of Pediatrics, University of California, San Diego, La Jolla, CA,Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA,Co-corresponding authors
| | - Jeffrey D. Esko
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA,Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA,Co-corresponding authors
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Poli M, Anower-E-Khuda F, Asperti M, Ruzzenenti P, Gryzik M, Denardo A, Gordts PL, Arosio P, Esko JD. Correction: Hepatic heparan sulfate is a master regulator of hepcidin expression and iron homeostasis in human hepatocytes and mice. J Biol Chem 2020; 295:10508. [DOI: 10.1074/jbc.aac120.014943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Painter CD, Clausen TM, Park J, Vasquez GJ, Liu J, Gordts PL, Esko JD. Molecular Interaction of Neuropilin‐1 and 3‐O‐sulfated Heparan Sulfate Modulates Angiogenesis‐dependent Tumor Growth. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.07258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Esko JD, Weiss RJ, Spahn P, Toledo AG, Chiang AW, Kellman BP, Li J, Benner C, Glass CK, Gordts PL, Lewis NE. Genome wide analysis of heparan sulfate assembly. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.00177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | | | - Jing Li
- University of California San Diego
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Poli M, Anower-E-Khuda F, Asperti M, Ruzzenenti P, Gryzik M, Denardo A, Gordts PL, Arosio P, Esko JD. Correction: Hepatic heparan sulfate is a master regulator of hepcidin expression and iron homeostasis in human hepatocytes and mice. J Biol Chem 2020; 295:3747. [DOI: 10.1074/jbc.aac120.013026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Gordts PL, Bartelt A, Nilsson SK, Annaert W, Christoffersen C, Nielsen LB, Heeren J, Roebroek AJ. Impaired LDL receptor-related protein 1 translocation correlates with improved dyslipidemia and atherosclerosis in apoE-deficient mice. PLoS One 2012; 7:e38330. [PMID: 22701627 PMCID: PMC3368875 DOI: 10.1371/journal.pone.0038330] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 05/03/2012] [Indexed: 01/20/2023] Open
Abstract
Objective Determination of the in vivo significance of LDL receptor-related protein 1 (LRP1) dysfunction on lipid metabolism and atherosclerosis development in absence of its main ligand apoE. Methods and Results LRP1 knock-in mice carrying an inactivating mutation in the NPxYxxL motif were crossed with apoE-deficient mice. In the absence of apoE, relative to LRP1 wild-type animals, LRP1 mutated mice showed an increased clearance of postprandial lipids despite a compromised LRP1 endocytosis rate and inefficient insulin-mediated translocation of the receptor to the plasma membrane, likely due to inefficient slow recycling of the mutated receptor. Postprandial lipoprotein improvement was explained by increased hepatic clearance of triglyceride-rich remnant lipoproteins and accompanied by a compensatory 1.6-fold upregulation of LDLR expression in hepatocytes. One year-old apoE-deficient mice having the dysfunctional LRP1 revealed a 3-fold decrease in spontaneous atherosclerosis development and a 2-fold reduction in LDL-cholesterol levels. Conclusion These findings demonstrate that the NPxYxxL motif in LRP1 is important for insulin-mediated translocation and slow perinuclear endosomal recycling. These LRP1 impairments correlated with reduced atherogenesis and cholesterol levels in apoE-deficient mice, likely via compensatory LDLR upregulation.
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Affiliation(s)
- Philip L.S.M. Gordts
- Laboratory for Experimental Mouse Genetics, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | - Alexander Bartelt
- Department of Biochemistry and Molecular Cell Biology
- Department of Orthopedics University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan K. Nilsson
- Department of Medical Biosciences/Physiological Chemistry, Umeå University, Umeå, Sweden
| | - Wim Annaert
- Laboratory of Membrane Trafficking, Department of Molecular and Developmental Genetics, VIB, Leuven, Belgium
- Laboratory of Membrane Trafficking, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | | | - Lars Bo Nielsen
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen, Denmark
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology
- * E-mail: (AJMR); (JH)
| | - Anton J.M. Roebroek
- Laboratory for Experimental Mouse Genetics, Center for Human Genetics, KU Leuven, Leuven, Belgium
- * E-mail: (AJMR); (JH)
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