A 50-year-old woman had triglyceride values up to 1640 mg/dL on routine laboratory tests. Despite the initiation of fenofibrate, icosapent ethyl, rosuvastatin, and a low-fat diet, her triglyceride val Show more
A 50-year-old woman had triglyceride values up to 1640 mg/dL on routine laboratory tests. Despite the initiation of fenofibrate, icosapent ethyl, rosuvastatin, and a low-fat diet, her triglyceride values ranged from 1200 to more than 8200 mg/dL, and she had recurrent pancreatitis. Testing was negative for mutations in chylomicronemia genes such as LPL, APOC2, APOA5, LMF1, and GPIHBP1. Additional testing revealed elevated autoantibodies to GPIHBP1 up to 2,336 U/mL (normal <58 U/mL) and decreased GPIHBP1 to 2.5 pg/mL (normal range 570-1,625 pg/mL), confirming GPIHBP1 autoantibody syndrome (GPIHBP1-AAS). The patient received rituximab 1000 mg infusion, with 2 doses given 3 weeks apart. Triglycerides decreased from 1,746 to 81 mg/dL within 4 months and remained normal 12 months later without repeat dosing. GPIHBP1-AAS was only recently described and is associated with severe hypertriglyceridemia and recurrent pancreatitis. In our case, treatment with rituximab was very effective. GPIHBP1-AAS-associated hypertriglyceridemia should be recognized and can be successfully treated with rituximab. Show less
Yaozhong Liu, Huilun Wang, Minzhi Yu+19 more · 2025 · medRxiv : the preprint server for health sciences · Cold Spring Harbor Laboratory · added 2026-04-24
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease without effective medications. This study integrated genetic, proteomic, and metabolomic data to identify causation between incre Show more
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease without effective medications. This study integrated genetic, proteomic, and metabolomic data to identify causation between increased triglyceride (TG)-rich lipoproteins and AAA risk. Three hypertriglyceridemia mouse models were employed to test the hypothesis that increased plasma TG concentrations accelerate AAA development and rupture. In the angiotensin II-infusion AAA model, most Show less
Second-generation antipsychotics (SGAs) are widely used to treat schizophrenia (SCZ), but they often induce metabolic side effects like dyslipidemia and obesity. We conducted genome-wide association s Show more
Second-generation antipsychotics (SGAs) are widely used to treat schizophrenia (SCZ), but they often induce metabolic side effects like dyslipidemia and obesity. We conducted genome-wide association studies (GWASs) to identify genetic variants associated with SGA-induced lipid and BMI changes in Chinese SCZ patients. A longitudinal cohort of Chinese SCZ receiving SGAs was followed for up to 18.7 years (mean = 5.7 years, SD = 3.3 years). We analysed the patients' genotypes (N = 669), lipid profiles, and BMI using 19 316 prescription records and 3 917 to 7 596 metabolic measurements per outcome. Linear mixed models were employed to evaluate seven SGAs' random effects on metabolic changes for each patient, followed by GWAS and gene set analyses with Bonferroni and FDR correction. Five SNPs achieved p-value < 5 × 10 Show less
Apolipoprotein A (ApoA) proteins, ApoA-I, ApoA-II, ApoA-IV, and ApoA-V, play critical roles in lipid metabolism, neuroinflammation, and blood-brain barrier integrity, making them pivotal in neurologic Show more
Apolipoprotein A (ApoA) proteins, ApoA-I, ApoA-II, ApoA-IV, and ApoA-V, play critical roles in lipid metabolism, neuroinflammation, and blood-brain barrier integrity, making them pivotal in neurological diseases such as Alzheimer's disease (AD), stroke, Parkinson's disease (PD), and multiple sclerosis (MS). This review synthesizes current evidence on their structural and functional contributions to neuroprotection, highlighting their dual roles as biomarkers and therapeutic targets. ApoA-I, the most extensively studied, exhibits anti-inflammatory, antioxidant, and amyloid-clearing properties, with reduced levels associated with AD progression and cognitive decline. ApoA-II modulates HDL metabolism and stroke risk, while ApoA-IV influences neuroinflammation and amyloid processing. ApoA-V, although less explored, is implicated in stroke susceptibility through its regulation of triglycerides. Genetic polymorphisms (e.g., Show less
To investigate the effect of tannic acid (TA) on the growth, disease resistance, and intestinal health of Chinese soft-shelled turtles, individual turtles were fed with 0 g/kg (CG), 0.5 g/kg, 1 g/kg, Show more
To investigate the effect of tannic acid (TA) on the growth, disease resistance, and intestinal health of Chinese soft-shelled turtles, individual turtles were fed with 0 g/kg (CG), 0.5 g/kg, 1 g/kg, 2 g/kg, and 4 g/kg TA diets for 98 days. Afterwards, the turtles' disease resistance was tested using Show less
A 50-year-old man with a triglyceride (TG) level of 11,397 mg/dL was admitted to our hospital. He consumed a high-fat and high-carbohydrate diet as well as more than 100 g of alcohol per day. He had t Show more
A 50-year-old man with a triglyceride (TG) level of 11,397 mg/dL was admitted to our hospital. He consumed a high-fat and high-carbohydrate diet as well as more than 100 g of alcohol per day. He had type 2 diabetes and obesity and had previously suffered from severe acute pancreatitis twice. A genetic analysis revealed compound heterozygous mutations in APOA5 (c.56C>G and c.553G>T). In addition to low-fat meals and alcohol cessation, administration of pemafibrate lowered his triglyceride levels to <150 mg/dL. Show less
Familial chylomicronemia syndrome (FCS) is a rare autosomal recessive disorder. This study aimed to analyze the genotype distribution of FCS-causing genes in the United Kingdom. Data were anonymously Show more
Familial chylomicronemia syndrome (FCS) is a rare autosomal recessive disorder. This study aimed to analyze the genotype distribution of FCS-causing genes in the United Kingdom. Data were anonymously collated from 2 genetic testing laboratories providing national genetic diagnosis services for severe hypertriglyceridemia in the United Kingdom. As of December 2023, 880 individuals underwent genetic testing for FCS. The mean (SD) age at the time of genetic testing was 42.5 (15.3) years. After genotyping, 12.9% of the individuals ( The genetic architecture of FCS in the United Kingdom is complex, with a substantial proportion affected by non- Show less
Cardiovascular disease remains the leading cause of death worldwide, and dyslipidemia is a critical, modifiable risk factor. We sought to evaluate the relationship between polymorphisms in In this cro Show more
Cardiovascular disease remains the leading cause of death worldwide, and dyslipidemia is a critical, modifiable risk factor. We sought to evaluate the relationship between polymorphisms in In this cross-sectional observational study, 304 participants aged 40-69 years were enrolled. Clinical, anthropometric, and biochemical data were collected, and genotyping was performed for the four target polymorphisms. We used descriptive statistics to characterize the sample, non-parametric tests to compare lipid levels by genotype, and multivariable logistic regression to identify independent predictors of dyslipidemia. Individuals with dyslipidemia exhibited significantly higher total cholesterol and VLDL levels, lower HDL levels, and an elevated Castelli II index compared with the non-dyslipidemia group. Although Our findings underscore the interplay between metabolic factors and genetic variants in the pathogenesis of dyslipidemia. Notably, the Show less
Apolipoprotein A-V (APOA5) is a critical regulator of circulating triglyceride (TG) levels. Its deletion leads to elevated plasma TG concentrations by altering the metabolism of VLDL particles in vivo Show more
Apolipoprotein A-V (APOA5) is a critical regulator of circulating triglyceride (TG) levels. Its deletion leads to elevated plasma TG concentrations by altering the metabolism of VLDL particles in vivo. One way APOA5 exerts its effects is through the modulation of LPL activity, specifically by disrupting inhibitory interactions between LPL and angiopoietin-like proteins (ANGPTLs). However, the impact of APOA5 on VLDL composition and its potential to alter VLDL metabolism in other ways remains poorly understood. To address this, we investigated the influence of APOA5 on the VLDL proteome, LPL activation, and hepatic remnant uptake. Using VLDL from Apoa5 KO and WT mice, we found no evidence that APOA5 directly enhances LPL activity in purified or plasma systems. However, VLDL from Apoa5 KO mice was cleared significantly more slowly by cultured hepatocytes. VLDL proteomics experiments from two independent laboratories identified altered contents of 23 proteins involved in lipoprotein metabolism, inflammation, and immune response in Apoa5 KO VLDL, including reductions in APOE and serum amyloid A1. Remarkably, reintroduction of recombinant mouse APOA5 to the KO plasma partially restored the WT VLDL proteome, including APOE, and normalized VLDL uptake by hepatocytes without altering LPL lipolysis. These findings reveal that APOA5 influences hepatic clearance of VLDL remnants by modulating particle composition, particularly APOE content. This study expands the functional scope of APOA5 in TG metabolism and underscores its role in VLDL remodeling and remnant clearance, offering new insights with implications for understanding hypertriglyceridemia and its roles in inflammation and immune response. Show less
Elucidating the genetic basis of lipid metabolism in children is essential for early intervention in dyslipidemia and cardiovascular diseases. We performed a two-staged genome-wide association study ( Show more
Elucidating the genetic basis of lipid metabolism in children is essential for early intervention in dyslipidemia and cardiovascular diseases. We performed a two-staged genome-wide association study (GWAS; N = 5412) and an independent exome-wide association study (ExWAS; N = 4750) on lipid parameters-HDL, LDL, Triglycerides (TG), Total Cholesterol (TC) in Indian school-going children - the largest single-cohort paediatric lipid study till date. GWAS identified robust associations at established loci, including CETP for HDL; CELSR2, and PSRC1 for LDL and TC, and GCKR, ZNF259, and TBL2 for TG. We also validated known associations at sub-GWAS significance in FADS2, GATAD2A, PRKCA, and QKI. Exome-based analyses further refined functional variants within these loci and revealed additional known loci in ALDH1A2 for HDL; APOE, APOC1, TM6SF2, CILP2, TOMM40, for LDL and TC; and APOA5, BUD13 for TG and novel loci in ATP8B3, MYH7B, GYS2, and RNF8 for TG. Conditional analysis revealed multiple independent signals at key loci. Gene-based GWAS pinpointed CETP and APOC1 as significant for HDL and LDL, respectively. Rare variant analysis identified significant contribution of loss-of-function missense variants in CETP, TM6SF2, and APOE, in regulating lipid profiles. Associations replicated with consistent directionality in European datasets and Indian adults, reinforcing conserved biology across ancestries and age groups. Functional enrichment analyses emphasized lipid-related pathways and differential expression in liver. These findings lay the foundation for ancestry-informed genetic risk prediction models to identify children at early risk for cardiovascular diseases. Show less
There are limited data on the use of whole-exome sequencing (WES) to diagnose severe hypertriglyceridemia. Our aim was to identify candidate genes linked to triglyceride levels via a genome-wide assoc Show more
There are limited data on the use of whole-exome sequencing (WES) to diagnose severe hypertriglyceridemia. Our aim was to identify candidate genes linked to triglyceride levels via a genome-wide association study (GWAS) and to recruit participants with severe hypertriglyceridemia for WES to assess allelic variants in the candidate genes. A GWAS was conducted involving 120,140 participants to identify lead loci associated with blood triglyceride levels. Following the identification of these lead loci, WES was performed on DNA samples from 29 participants with hypertriglyceridemia whose triglyceride levels exceeded 800 mg/dL to assess variations in the corresponding genes. In the GWAS of 120,140 participants, the apolipoprotein A5 (APOA5) locus on chromosome 11 showed the strongest association with blood triglyceride levels (lead single nucleotide polymorphism [SNP] rs2075291; P=3.07×10 Our study confirms the role of known genetic loci in triglyceride metabolism and hypertriglyceridemia while uncovering novel loci, offering new perspectives on lipid regulation and potential avenues for therapeutic advancements. Show less
To characterise severe hypertriglyceridaemia (HTG) in Indian children, focusing on clinical and genetic profiles. A retrospective analysis from January 2017 to December 2023 included children up to 14 Show more
To characterise severe hypertriglyceridaemia (HTG) in Indian children, focusing on clinical and genetic profiles. A retrospective analysis from January 2017 to December 2023 included children up to 14 years old with triglyceride (TG) levels > 500 mg/dl, excluding children with known secondary causes. Among 18 children with severe HTG, 7 had secondary causes. Data from 11 patients (7 boys, median age at diagnosis 0.9 [0.45-2.4] years) revealed presenting features such as lipemic serum (63.3%), failure to thrive (36.3%), loss of subcutaneous fat (18.2%), and abdominal distension (18.2%). Genetic aetiology was identified in 10 cases, with familial chylomicronaemia syndrome (FCS) being the most prevalent (6 cases) caused by the lipoprotein lipase (LPL) and apolipoprotein A-V (APOA5) gene mutations. One each had mutations in the 1-acylglycerol-3-phosphate O-acyltransferase 2 (AGPAT2), lamin A/C (LMNA), glucose-6-phosphatase catalytic subunit (G6PC), and glycerol kinase (GK) genes. FCS patients presented earlier and were resistant to treatment targets, requiring drug therapy. At the final follow-up (mean duration 1.75 ±1.0 years) of 9 patients, the median TG levels for the FCS and non-FCS groups were 1240 (610-1,685) and 412 (247.5-993) mg/dl, respectively. Only 2 patients (40%) with FCS had TG levels < 1000 mg/dl, while all but one (75%) non-FCS subjects had TG levels < 500 mg/dl at the last follow-up. One child developed acute pancreatitis during the said duration. Paediatric HTG is often detected incidentally. Genetic characterisation is crucial for prognosis because baseline TG levels are non-predictive. Drug therapy helps to reach treatment targets in most of the patients. Show less
We aimed to compare the molecular and clinical characteristics of patients identified in Italy as affected by either familial chylomicronemia syndrome (FCS) or multifactorial chylomicronemia syndrome Show more
We aimed to compare the molecular and clinical characteristics of patients identified in Italy as affected by either familial chylomicronemia syndrome (FCS) or multifactorial chylomicronemia syndrome (MCS) and to assess the overall benefit of novel triglyceride-lowering therapies prescribed to these patients within the routine clinical care. From the national LIPIGEN-sHTG (Lipid Transport Disorders Italian Genetic Network-Severe Hypertriglyceridemia) registry, 169 patients (57 FCS, 51 MCS, 61 variant-negative, variant-negative MCS) were retrospectively analyzed. Data on clinical and genetic characteristics, medical history, and medications were collected. Peak triglyceride levels were used to define untreated lipid phenotypes. In FCS, 72% exhibited biallelic As compared with MCS, patients with FCS showed a more severe phenotype and higher prevalence of Show less
Hypertriglyceridemia is mostly associated with secondary conditions in children but can also result from monogenic disorders. The most prevalent genes identified as the underlying reason for impaired Show more
Hypertriglyceridemia is mostly associated with secondary conditions in children but can also result from monogenic disorders. The most prevalent genes identified as the underlying reason for impaired clearance of triglycerides from plasma by genome-wide association studies are the LPL, APOC2, APOA5, LMF1, APOE and GPIHBP1 genes. In this study, 26 pediatric patients with primary hypertriglyceridemia, 12 of whom were severe, were screened for monogenic causes via a next-generation sequencing panel that included 25 genes, namely, ABCA1, ABCG5, ABCG8, ANGPTL3, APOA1, APOA5, APOB, APOC2, APOC3, APOE, CETP, GPD1, GPIHBP1, LCAT, LDLR, LDLRAP1, LIPA, LIPC, LMF1, LPL, MTTP, NPC1L1, OSBPL5, PCSK9 and SAR1B. Additional findings, such as positive family history, hepatomegaly, splenomegaly, history of acute pancreatitis, hepatosteatosis, and atherosclerotic cardiovascular disease, were recorded. Twenty different variants, 16 of which were novel, were detected. Among these, six of the eight clinically significant mutations detected in the LPL, GPD1, GPIHBP1, APOC2, and LIPC genes were novel mutations. At least one variant was identified in 17 of 26 patients (65.4%), whereas no variants were detected in 9 patients (34.6%). Clinically significant variants that could explain the clinical findings were detected in 7 (58.3%) of the 12 patients with severe hypertriglyceridemia. In 4 out of the 6 patients with a familial history of hypertriglyceridemia, we identified pathogenic variants in the GPD1, LIPC, LPL and APOC2 genes, which are associated with hypertriglyceridemia. Targeting gene panels for suspected monogenic hypertriglyceridemia is a promising way to identify the underlying etiology, which enables genetic counseling and family screening to identify new patients and provides a personalized treatment approach. Show less
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease with no effective pharmacological treatments. The causal role of triglycerides (TGs) in AAA development remains unclear and contr Show more
Abdominal aortic aneurysm (AAA) is a life-threatening vascular disease with no effective pharmacological treatments. The causal role of triglycerides (TGs) in AAA development remains unclear and controversial. Mendelian randomization was applied to assess causal relationships between lipoproteins, circulating proteins, metabolites, and the risk of AAA. To test the hypothesis that elevated plasma TG levels accelerate AAA development, we used Mendelian randomization analyses integrating genetic, proteomic, and metabolomic data identified causal relationships between elevated TG-rich lipoproteins, TG metabolism-related proteins/metabolites, and AAA risk. In the angiotensin II infusion AAA model, most These findings identify hypertriglyceridemia as a key contributor to AAA pathogenesis and suggest that targeting TG-rich lipoproteins may be a promising therapeutic strategy for AAA. Show less
Cholesterol (CH) plays a crucial role in enhancing the membrane stability of drug delivery systems (DDS). However, its association with conditions such as hyperlipidemia often leads to criticism, over Show more
Cholesterol (CH) plays a crucial role in enhancing the membrane stability of drug delivery systems (DDS). However, its association with conditions such as hyperlipidemia often leads to criticism, overshadowing its influence on the biological effects of formulations. In this study, we reevaluated the delivery effect of CH using widely applied lipid microspheres (LM) as a model DDS. We conducted comprehensive investigations into the impact of CH on the distribution, cell uptake, and protein corona (PC) of LM at sites of cardiovascular inflammatory injury. The results demonstrated that moderate CH promoted the accumulation of LM at inflamed cardiac and vascular sites without exacerbating damage while partially mitigating pathological damage. Then, the slow cellular uptake rate observed for CH@LM contributed to a prolonged duration of drug efficacy. Network pharmacology and molecular docking analyses revealed that CH depended on LM and exerted its biological effects by modulating peroxisome proliferator-activated receptor gamma (PPAR-γ) expression in vascular endothelial cells and estrogen receptor alpha (ERα) protein levels in myocardial cells, thereby enhancing LM uptake at cardiovascular inflammation sites. Proteomics analysis unveiled a serum adsorption pattern for CH@LM under inflammatory conditions showing significant adsorption with CH metabolism-related apolipoprotein family members such as apolipoprotein A-V (Apoa5); this may be a major contributing factor to their prolonged circulation Show less
Familial hypertriglyceridemia (FHTG) is a rare inherited lipid disorder that may present with severe phenotypes when caused by compound heterozygous or biallelic APOA5 variants. We report a male child Show more
Familial hypertriglyceridemia (FHTG) is a rare inherited lipid disorder that may present with severe phenotypes when caused by compound heterozygous or biallelic APOA5 variants. We report a male child diagnosed at 2.5 years of age with severe hypertriglyceridemia, who exhibited serum triglyceride levels persistently above 10 mmol/L (≈ 885 mg/dl) despite adherence to a low-fat diet and pharmacotherapy including fibrates, omega-3 fatty acids, and statins. Representative triglycerides at presentation were 11.6 mmol/L (≈ 1029 mg/dl). During follow up, the patient experienced an acute abdominal pain episode with triglycerides nearing 20 mmol/L (≈ 1770 mg/dL), managed conservatively under suspicion of pancreatitisOral glucose tolerance testing showed a high-normal insulin response (peak 84.5 mIU/L, below the insulin-resistance threshold of 100-150 mIU/L), which prompted addition of metformin. Over a decade, despite normal growth and clinical well-being, biochemical control remained suboptimal. This case illustrates the clinical utility of early genetic testing in pediatric dyslipidemias and highlights limitations of traditional treatments in monogenic severe FHTG. Emerging therapies, including antisense oligonucleotides and ANGPTL3 inhibitors, may hold future promise. Show less
Cholesteryl ester transfer protein (CETP) mediates the exchange of triglycerides (TG) from apolipoprotein B (ApoB)-containing lipoproteins to high-density lipoproteins (HDL) and the reciprocal exchang Show more
Cholesteryl ester transfer protein (CETP) mediates the exchange of triglycerides (TG) from apolipoprotein B (ApoB)-containing lipoproteins to high-density lipoproteins (HDL) and the reciprocal exchange of cholesterol (C) from HDL to ApoB-containing lipoproteins. CETP inhibition increases HDL-C and decreases low-density lipoprotein cholesterol (LDL-C) while modestly decreasing TG. Considering that CETP inhibitors block removal of TG from TG-rich lipoproteins (TRL), it is interesting that CETP inhibition decreases TG concentrations. TG levels are largely regulated by lipoprotein lipase (LPL), the enzyme primarily responsible for hydrolyzing TG. The angiopoietin-like 3/8 complex (ANGPTL3/8) is the most potent circulating LPL inhibitor, while the TG-lowering apolipoprotein A5 (ApoA5) acts by suppressing ANGPTL3/8-mediated LPL inhibition. To better understand CETP biology, we studied the effects of CETP overexpression and CETP inhibition on the levels of ANGPTL3/8 and ApoA5 in circulation using dedicated immunoassays. CETP-overexpressing transgenic mice had increased TG and normal ANGPTL3/8 levels but manifested dramatically reduced ApoA5 concentrations. Administration of the CETP inhibitor evacetrapib had no effect on ANGPTL3/8 levels in CETP-overexpressing mice or in humans. However, evacetrapib administration increased ApoA5 concentrations in both species. In human subjects, evacetrapib treatment increased circulating ApoA5 levels in the late-stage ACCELERATE and ACCENTUATE studies by 160.1% and 204.7%, respectively. Our results uncover a previously unrecognized link between CETP and ApoA5 by showing that CETP overexpression reduces ApoA5 levels while CETP inhibition increases ApoA5 concentrations. Show less
To investigate the association between polymorphisms of the A case-control study was conducted, enrolling 100 HTG patients and 100 age-matched controls with normal triglyceride levels from the physica Show more
To investigate the association between polymorphisms of the A case-control study was conducted, enrolling 100 HTG patients and 100 age-matched controls with normal triglyceride levels from the physical examination cohort at Guangzhou 11th People's Hospital (January-December 2023) The observation group showed significant differences in genotype frequencies of Show less
A 3-year-old patient presented with severe hypertriglyceridemia and suspected familial chylomicronemia syndrome. Genetic analysis of the patient's DNA revealed the presence of 2 different heterozygous Show more
A 3-year-old patient presented with severe hypertriglyceridemia and suspected familial chylomicronemia syndrome. Genetic analysis of the patient's DNA revealed the presence of 2 different heterozygous nonsense variants in the APOA5 gene encoding apolipoprotein (apo) A-V, namely p.Q275X and p.L242C fs X54. Our objective was to characterize the structural and functional consequences of the patient's co-occuring compound heterozygous variants in APOA5. Biozentrum's SWISS-MODEL was employed to predict the structure of apo A-V variants. Plasma from the patient and their family was used to determine lipid profiles, quantify apo C-II and apo C-III protein levels, and measure lipoprotein lipase (LPL) activity. High-density lipoprotein (HDL) was isolated from plasma and was used to assess sterol efflux capacity and proteome. Structural characterization of the patient's APOA5 variants indicated premature truncation of the C-terminus of apo A-V that comprises the lipid binding domain. The patient's apo A-V was completely absent from the very-low density lipoprotein (VLDL) plasma fraction, associating almost exclusively with the low-density lipoprotein (LDL) and lipoprotein-free fractions. The patient's plasma also demonstrated reduced LPL activity and elevated apo C-II and C-III compared to other family members. The patient's HDL had the lowest sterol efflux capacity of all family members and a distinct proteome with reduced phospholipid transfer protein. Dietary intervention alone was effective in preventing recurring hypertriglyceridemia. These findings add to the current knowledge of apo A-V's role in plasma lipid homeostasis, pointing to a critical role for apo A-V binding to the lipoprotein particle in normal hydrolysis of triglyceride-rich lipoproteins. Show less
The genetic basis of hypertriglyceridemia (HTG) is complex and includes variants in lipase maturation factor 1 (LMF1), an endoplasmic reticulum (ER)-chaperone involved in the post-translational activa Show more
The genetic basis of hypertriglyceridemia (HTG) is complex and includes variants in lipase maturation factor 1 (LMF1), an endoplasmic reticulum (ER)-chaperone involved in the post-translational activation of lipoprotein lipase (LPL). The objective of this study was to identify and functionally characterize biallelic LMF1 variants in patients with HTG. Genomic DNA sequencing was used to identify biallelic LMF1 variants in HTG patients without deleterious variants in LPL, apolipoprotein C-II (APOC2), glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 (GPIHBP1) or apolipoprotein A-V (APOA5). LMF1 variants were functionally evaluated by in silico analyses and assessing their impact on LPL activity, LMF1 protein expression, and specific activity in transiently transfected HEK293 cells. We identified four homozygous LMF1 variants in patients with severe HTG: two novel rare variants (p.Asn147Lys and p.Pro246Arg) and two low-frequency variants (p.Arg354Trp and p.Arg364Gln) previously reported at heterozygosity. We demonstrate that all four variants reduce the secretion of enzymatically active LPL by impairing the specific activity of LMF1, whereas p.Asn147Lys also diminishes LMF1 protein expression. This study extends the role of LMF1 as a genetic determinant in severe HTG and demonstrates that rare and low-frequency LMF1 variants can underlie this condition through distinct molecular mechanisms. The clinical phenotype of patients affected by partial loss of LMF1 function is consistent with multifactorial chylomicronemia syndrome (MCS) and suggests that secondary factors and additional genetic determinants contribute to HTG in these subjects. Show less
This pioneering genome-wide association study examined surrogate markers for insulin resistance (IR) in 147,880 Taiwanese individuals using data from the Taiwan Biobank. The study focused on two IR su Show more
This pioneering genome-wide association study examined surrogate markers for insulin resistance (IR) in 147,880 Taiwanese individuals using data from the Taiwan Biobank. The study focused on two IR surrogate markers: the triglyceride to high-density lipoprotein cholesterol (TG:HDL-C) ratio and the TyG index (the product of fasting plasma glucose and triglycerides). We identified genome-wide significance loci within four gene clusters: GCKR, MLXIPL, APOA5, and APOC1, uncovering 197 genes associated with IR. Transcriptome-wide association analysis revealed significant associations between these clusters and TyG, primarily in adipose tissue. Gene ontology analysis highlighted pathways related to Alzheimer's disease, glucose homeostasis, insulin resistance, and lipoprotein dynamics. The study identified sex-specific genes associated with TyG. Polygenic risk score analysis linked both IR markers to gout and hyperlipidemia. Our findings elucidate the complex relationships between IR surrogate markers, genetic predisposition, and disease phenotypes in the Taiwanese population, contributing valuable insights to the field of metabolic research. Show less
Familial chylomicronemia syndrome (FCS) comprises a group of ultrarare disorders caused by biallelic variants in LPL or, less frequently, by GPIHBP1, APOC2, APOA5, or LMF1. To evaluate the phenotypes Show more
Familial chylomicronemia syndrome (FCS) comprises a group of ultrarare disorders caused by biallelic variants in LPL or, less frequently, by GPIHBP1, APOC2, APOA5, or LMF1. To evaluate the phenotypes and management of eight non-lipoprotein lipase (LPL)-FCS patients. Seven pediatric and one adult patients with non-LPL-FCS were enrolled. Clinical features, treatment outcomes, and genetic profiles were assessed. Among the 33 patients with FCS, 25 (76%) had LPL-FCS and eight (24%) had non-LPL-FCS; five had variants in GPIHBP1, one each in the LMF1, APOC2, and one with composite heterozygous variants in APOA5 and LPL. Twelve non-LPL variants were identified, five of which were novel variants in GPIHBP1 and two in LMF1. In silico predictions indicated that all novel variants might impact protein function. Elevated baseline triglyceride (TG) levels [22.9 (17.4-30.8) mmol/L, 2026.7 (1540.0-2728.5) mg/dL] were observed in all patients. Among the pediatric patients (7/7), chylomicronemia was the most common onset symptom. Acute pancreatitis was observed in only one patient with LMF1-FCS during pregnancy. The frequency of symptoms and lipid levels in the non-LPL-FCS group were slightly lower than those in the LPL-FCS group (P > 0.05). Dietary fat restriction reduced TG levels by 84.0% to 4.21 mmol/L (372.6 mg/dL, P < 0.01). Compared with other non-LPL-FCS patients, GPIHBP1-FCS patients experienced greater challenges in managing TG levels (P < 0.05). This study unveiled the genetic profile of the Chinese FCS cohort and enriched the mutation spectrum of non-LPL-FCS. The clinical characteristics and treatment outcomes of patients with non-LPL-FCS were delineated. Show less
The apolipoprotein A5 ( In a case study conducted at the First Affiliated Hospital of Xinjiang Medical University between Jan 2019 and Dec 2021, we examined a total of 700 cases of EHT along with 700 Show more
The apolipoprotein A5 ( In a case study conducted at the First Affiliated Hospital of Xinjiang Medical University between Jan 2019 and Dec 2021, we examined a total of 700 cases of EHT along with 700 corresponding controls. The serum concentrations of various lipid parameters were measured by enzymatic method, while the genotyping of the SNP was performed using the improved multiplex ligation detection reaction (iMLDR) method. The independent risk factors of EHT were identified from multivariable logistic regression analysis. The nomogram prediction model that incorporated the Our study revealed a higher prevalence of the G allele of the rs662799 variant in individuals diagnosed with EHT compared to the control group. Logistic regression analysis indicated that with the adjustment of other confounders, the observed difference between the two groups remained statistically significant [odds ratio (OR) =1.519; 95% confidence interval (CI): 1.203-1.917; P<0.001]. Based on 8 independent risk factors including In our study, the rs662799 variant of the Show less
Selenoprotein P (SELENOP) acts as a crucial mediator, distributing selenium from the liver to other tissues within the body. Despite its established role in selenium metabolism, the specific functions Show more
Selenoprotein P (SELENOP) acts as a crucial mediator, distributing selenium from the liver to other tissues within the body. Despite its established role in selenium metabolism, the specific functions of SELENOP in the development of liver cancer remain enigmatic. This study aims to unravel SELENOP's associations in hepatocellular carcinoma (HCC) by scrutinizing its expression in correlation with disease characteristics and investigating links to hormonal and lipid/triglyceride metabolism biomarkers as well as its potential as a prognosticator for overall survival and predictor of hypoxia. SELENOP mRNA expression was analyzed in 372 HCC patients sourced from The Cancer Genome Atlas (TCGA), utilizing statistical methodologies in R programming and machine learning techniques in Python. SELENOP expression significantly varied across HCC grades ( Show less
Although platinum-based chemotherapy is the frontline regimen for colorectal cancer (CRC), drug resistance remains a major challenge affecting its therapeutic efficiency. However, there is limited res Show more
Although platinum-based chemotherapy is the frontline regimen for colorectal cancer (CRC), drug resistance remains a major challenge affecting its therapeutic efficiency. However, there is limited research on the correlation between chemotherapy resistance and lipid metabolism, including PIK3CA mutant tumors. In this present study, we found that PIK3CA-E545K mutation attenuated cell apoptosis and increased the cell viability of CRC with L-OHP treatment Show less
Familial chylomicronemia syndrome (FCS) is a rare disorder of triglyceride (TG) metabolism caused by loss of function variants in one of five known canonical genes involved in chylomicron lipolysis an Show more
Familial chylomicronemia syndrome (FCS) is a rare disorder of triglyceride (TG) metabolism caused by loss of function variants in one of five known canonical genes involved in chylomicron lipolysis and clearance- Show less
Familial chylomicronemia syndrome (FCS) is a rare autosomal recessive condition. Effective treatment is important as patients are at risk for severe and potentially fatal acute pancreatitis. We review Show more
Familial chylomicronemia syndrome (FCS) is a rare autosomal recessive condition. Effective treatment is important as patients are at risk for severe and potentially fatal acute pancreatitis. We review recent developments in pharmacologic treatment for FCS, namely biological inhibitors of apolipoprotein (apo) C-III and angiopoietin-like protein 3 (ANGPTL3). FCS follows a biallelic inheritance pattern in which an individual inherits two pathogenic loss-of-function alleles of one of the five causal genes - Apo C-III inhibitors currently in development are promising treatments for FCS. Show less