{"id":4422571,"date":"2025-01-12T06:12:22","date_gmt":"2025-01-12T12:12:22","guid":{"rendered":"https:\/\/myendoconsult.com\/learn\/topics\/hypertriglyceridemia\/"},"modified":"2025-01-12T06:21:14","modified_gmt":"2025-01-12T12:21:14","slug":"hypertriglyceridemia","status":"publish","type":"oen_topic","link":"https:\/\/myendoconsult.com\/learn\/topics\/hypertriglyceridemia\/","title":{"rendered":"Hypertriglyceridemia"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">DEFINITIONS AND RISK STRATIFICATION<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Serum Triglyceride Concentrations (mg\/dL)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Normal: &lt;150<\/li>\n\n\n\n<li>Borderline high: 150\u2013199<\/li>\n\n\n\n<li>High: 200\u2013499<\/li>\n\n\n\n<li>Very high: \u2265500<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Hypertriglyceridemia<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Defined as serum triglyceride >199 mg\/dL.<\/li>\n\n\n\n<li>Associated with increased risk of <strong>cardiovascular disease<\/strong>.<\/li>\n\n\n\n<li>Can be caused or exacerbated by:\n<ul class=\"wp-block-list\">\n<li>Obesity<\/li>\n\n\n\n<li>Poorly controlled <a href=\"https:\/\/myendoconsult.com\/learn\/diabetes-mellitus\/\"  data-wpil-monitor-id=\"282\">diabetes mellitus<\/a><\/li>\n\n\n\n<li>Nephrotic syndrome<\/li>\n\n\n\n<li>Hypothyroidism<\/li>\n\n\n\n<li>Oral estrogen therapy<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">METABOLIC BASIS<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Trapping of Triglyceride-Rich Lipoproteins<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Hypertriglyceridemia = accumulation of <strong>VLDL, VLDL remnants, and\/or chylomicrons<\/strong>.<\/li>\n\n\n\n<li>Often coupled with <strong>variable <a href=\"https:\/\/myendoconsult.com\/learn\/topics\/hypercholesterolemia\/\"  data-wpil-monitor-id=\"283\">hypercholesterolemia<\/a><\/strong> because these lipoproteins also carry cholesterol.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Role of Lipoprotein Lipase (LPL)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Hydrolyzes triglycerides in chylomicrons and VLDL into free fatty acids for energy usage or storage.<\/li>\n\n\n\n<li>Facilitates transfer of cholesterol to HDL.<\/li>\n\n\n\n<li><strong>Deficient LPL activity<\/strong> \u2192 hypertriglyceridemia + low HDL.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">FREDRICKSON PHENOTYPE CLASSIFICATION<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Type I: LPL Deficiency<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>chylomicrons<\/strong>, markedly high triglycerides.<\/li>\n\n\n\n<li>Serum can show a <strong>creamy top layer<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Type IIa: Familial Hypercholesterolemia<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>LDL<\/strong>, high total cholesterol.<\/li>\n\n\n\n<li>Serum appears clear.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Type IIb<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>LDL<\/strong> and <strong>VLDL<\/strong>.<\/li>\n\n\n\n<li>Serum appears clear.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Type III: Familial Dysbetalipoproteinemia<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>VLDL remnants<\/strong> + <strong>chylomicrons<\/strong>.<\/li>\n\n\n\n<li>Serum appears turbid.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Type IV: Familial Hypertriglyceridemia<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>VLDL<\/strong>.<\/li>\n\n\n\n<li>Serum appears turbid.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Type V: Mixed Hypertriglyceridemia<\/strong>\n<ul class=\"wp-block-list\">\n<li>Increased <strong>chylomicrons<\/strong> + <strong>VLDL<\/strong>.<\/li>\n\n\n\n<li>Serum has <strong>creamy top layer<\/strong> and <strong>turbid lower layer<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">SPECIFIC CAUSES<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Type I Hyperlipoproteinemia (LPL or Apo CII Deficiency)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Rare recessive<\/strong> disorders:\n<ul class=\"wp-block-list\">\n<li>Absent LPL activity <strong>or<\/strong> absent apo CII (cofactor for LPL).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Severe hypertriglyceridemia<\/strong> due to blocked clearance of triglyceride-rich particles.<\/li>\n\n\n\n<li><strong>Chylomicronemia syndrome<\/strong> is common (see below).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Type IIa Hyperlipoproteinemia<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Familial Hypercholesterolemia<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Defect in LDL receptor, leading to high LDL.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Type IIb Hyperlipoproteinemia<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Combined hyperlipidemia<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Decreased LDL receptor function + increased apo B \u2192 high LDL + VLDL.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Type III Hyperlipoproteinemia (Familial Dysbetalipoproteinemia)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Apo E<\/strong> isoform defect \u2192 poor clearance of VLDL &amp; chylomicron remnants.<\/li>\n\n\n\n<li>Typical genotype: homozygous <strong>E2\/E2<\/strong>.<\/li>\n\n\n\n<li>Leads to <strong>premature CHD<\/strong> + <strong>tuberoeruptive xanthomas<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Type IV Hyperlipoproteinemia (Familial Hypertriglyceridemia)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Autosomal dominant<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Overproduction of VLDL; moderate hypertriglyceridemia (200\u2013500 mg\/dL).<\/li>\n\n\n\n<li>Low HDL and normal LDL are common.<\/li>\n\n\n\n<li>Aggravated by alcohol, estrogens, etc.<\/li>\n\n\n\n<li>Typically associated with obesity, <a href=\"https:\/\/myendoconsult.com\/learn\/homa-ir-calculator\/\"  data-wpil-monitor-id=\"284\">insulin resistance<\/a>, hyperglycemia, and hypertension.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Type V Hyperlipoproteinemia (Mixed Hypertriglyceridemia)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Very high<\/strong> triglycerides (>99th percentile).<\/li>\n\n\n\n<li>Increased <strong>chylomicrons<\/strong> + <strong>VLDL<\/strong>.<\/li>\n\n\n\n<li>Serum has a <strong>creamy<\/strong> supernatant and <strong>turbid<\/strong> infranatant.<\/li>\n\n\n\n<li>May include <strong>hepatosplenomegaly<\/strong>, eruptive xanthomas.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Familial Combined Hyperlipidemia<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Genetically heterogeneous<\/strong> disorder.<\/li>\n\n\n\n<li>Overproduction of <strong>apo B100<\/strong> in VLDL.<\/li>\n\n\n\n<li>Presents with <strong>hypercholesterolemia + hypertriglyceridemia<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Apo C Proteins in Triglyceride Metabolism<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Apo CI<\/strong> and <strong>apo CIII<\/strong>: regulate uptake of triglyceride-rich lipoproteins by interfering with apo E binding at lipoprotein receptors.<\/li>\n\n\n\n<li><strong>Apo CII<\/strong>: an <strong>LPL cofactor<\/strong>; deficiency leads to severe hypertriglyceridemia.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">CLINICAL PRESENTATIONS<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Chylomicronemia Syndrome (Triglycerides &gt;1000 mg\/dL)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Abdominal pain<\/strong> and acute <strong>pancreatitis<\/strong> (can be life-threatening).<\/li>\n\n\n\n<li><strong>Eruptive xanthomas<\/strong>.<\/li>\n\n\n\n<li><strong>Flushing<\/strong> with alcohol.<\/li>\n\n\n\n<li><strong>Memory loss<\/strong> and <strong>lipemia retinalis<\/strong>.<\/li>\n\n\n\n<li>Usually seen in <strong>LPL deficiency<\/strong> or <strong>apo CII deficiency<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Physical and Laboratory Findings<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Eruptive xanthomas<\/strong> occur if TG > 1000 mg\/dL.<\/li>\n\n\n\n<li><strong>Plasma or serum<\/strong> becomes turbid (>2000 mg\/dL) or milky with high chylomicrons.<\/li>\n\n\n\n<li>Very low in volume weighting may cause measurement artifacts in electrolytes.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">TREATMENT APPROACH<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Lifestyle Modifications<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Weight loss (if obese).<\/li>\n\n\n\n<li>Regular isotonic <strong>exercise<\/strong>.<\/li>\n\n\n\n<li><strong>Optimize glycemic control<\/strong> (in diabetics).<\/li>\n\n\n\n<li>Limit <strong>alcohol<\/strong> intake.<\/li>\n\n\n\n<li><strong>Avoid<\/strong> free\/simple carbohydrates.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Pharmacologic Interventions<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Statins (HMG-CoA reductase inhibitors)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Best if both LDL and TG are elevated.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Fibrates (gemfibrozil, fenofibrate)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Lower triglycerides by up to ~50%; good for predominant hypertriglyceridemia.<\/li>\n\n\n\n<li>Gemfibrozil can increase risk of statin-related myopathy.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Niacin<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Lowers TG but may cause hyperglycemia; caution in impaired glucose tolerance.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Omega-3 Fatty Acids (fish oil)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>High doses (\u22653 g\/day) can reduce TG by ~50%.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Orlistat<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Consider for type V hyperlipoproteinemia refractory to standard therapies, as it reduces GI fat absorption.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Preventing Pancreatitis<\/strong>\n<ul class=\"wp-block-list\">\n<li>When TG \u2265500 mg\/dL, first goal = <strong>avoid pancreatitis<\/strong>.<\/li>\n\n\n\n<li>Rapid intervention using fibrates or niacin to reduce TG below 500 mg\/dL.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>DEFINITIONS AND RISK STRATIFICATION METABOLIC BASIS FREDRICKSON PHENOTYPE CLASSIFICATION SPECIFIC CAUSES Type I Hyperlipoproteinemia (LPL or Apo CII Deficiency) Type IIa Hyperlipoproteinemia Type IIb Hyperlipoproteinemia Type III Hyperlipoproteinemia (Familial Dysbetalipoproteinemia) Type IV Hyperlipoproteinemia (Familial Hypertriglyceridemia) Type V Hyperlipoproteinemia (Mixed Hypertriglyceridemia) Familial Combined Hyperlipidemia Apo C Proteins in Triglyceride Metabolism CLINICAL PRESENTATIONS Chylomicronemia Syndrome (Triglycerides &gt;1000 [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","oen_topic_chapter":[688],"class_list":["post-4422571","oen_topic","type-oen_topic","status-publish","hentry","oen_topic_chapter-lipid-metabolism","post-wrapper","thrv_wrapper"],"_links":{"self":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422571","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic"}],"about":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/types\/oen_topic"}],"version-history":[{"count":3,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422571\/revisions"}],"predecessor-version":[{"id":4422575,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422571\/revisions\/4422575"}],"wp:attachment":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/media?parent=4422571"}],"wp:term":[{"taxonomy":"oen_topic_chapter","embeddable":true,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic_chapter?post=4422571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}