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Lin S, Hu T, Wang K, Wang J, Zhu Y, Chen X. In vitro assessment of the pathogenicity of the LDLR c.2160delC variant in familial hypercholesterolemia. Lipids Health Dis 2023; 22:77. [PMID: 37340302 DOI: 10.1186/s12944-023-01848-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 06/13/2023] [Indexed: 06/22/2023] Open
Abstract
BACKGROUND Familial hypercholesterolemia (FH) is an inherited disorder with markedly elevated low-density lipoprotein cholesterol (LDL-C) and premature atherosclerotic cardiovascular disease. Although many mutations have been reported in FH, only a few have been identified as pathogenic mutations. This study aimed to confirm the pathogenicity of the LDL receptor (LDLR) c.2160delC variant in FH. METHODS In this study, the proband and her family members were systematically investigated, and a pedigree map was drawn. High-throughput whole-exome sequencing was used to explore the variants in this family. Next, quantitative polymerase chain reaction (qPCR), western blot (WB) assays, and flow cytometry were conducted to detect the effect of the LDLR c.2160delC variant on its expression. The LDL uptake capacity and cell localization of LDLR variants were analyzed by confocal microscopy. RESULTS According to Dutch Lipid Clinic Network (DLCN) diagnostic criteria, three FH patients were identified with the LDLR c.2160delC variant in this family. An in-silico analysis suggested that the deletion mutation at the 2160 site of LDLR causes a termination mutation. The results of qPCR and WB verified that the LDLR c.2160delC variant led to early termination of LDLR gene transcription. Furthermore, the LDLR c.2160delC variant caused LDLR to accumulate in the endoplasmic reticulum, preventing it from reaching the cell surface and internalizing LDL. CONCLUSIONS The LDLR c.2160delC variant is a terminating mutation that plays a pathogenic role in FH.
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Affiliation(s)
- Shaoyi Lin
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Tingting Hu
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Kaihan Wang
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Jiaqi Wang
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yunyun Zhu
- Department of Geriatrics, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Xiaomin Chen
- Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China.
- Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
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Kholaif N, Mohamed TI, Alharbi IS, Aljenedil SA, AlHumaidan H, Al-Ashwal A, Almahfouz A, Algorashi S, Almasood A, Baqal OJ. Management and clinical outcomes of patients with homozygous familial hypercholesteremia in Saudi Arabia. Monaldi Arch Chest Dis 2023; 93. [PMID: 36786168 DOI: 10.4081/monaldi.2023.2503] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 12/26/2022] [Indexed: 02/05/2023] Open
Abstract
We report the incidence, patient characteristic with clinical outcomes in patients with homozygous familial hypercholesterolemia (HoFH) in Saudi Arabia. This is a retrospective and prospective, single center study which included 37 patients 14 years and older enrolled and followed up between 2018-2021 for three years. 46% were females, 78% were offspring of consanguineous marriage. LDLR mutation was in 78% and LDL-C/LDLRAP in 3% of patients. Mean LDL-C at the first presentation was 14.2±3.7 mmol/L, average Dutch lipid score was 20.9±6.24. LDL apheresis was performed on 70% of patients. Most patients were on ezetimibe (92%), high-dose statins ( 84%) and PCSK9 inhibitors (32%). 48.6% had aortic stenosis, out of which 30% had severe aortic stenosis. Ten underwent aortic valve surgery (5 mechanical valve, 3 Ross procedure, 1 aortic valve repair, 1 bioprosthetic valve) and one had transcatheter aortic valve implantation (TAVI). Coronary artery bypass surgery (CABG) was performed on 32% and percutaneous intervention (PCI) on 11% of patients. HoFH patients have complex diseases with high morbidity and mortality, and benefit from a highly specialized multidisciplinary clinic to address their clinical needs. Although there are several therapeutic agents on the horizon, early diagnosis, and treatment of HoFH remain critical to optimize patient outcomes.
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Affiliation(s)
- Naji Kholaif
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Tahir I Mohamed
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh.
| | - Ibrahim S Alharbi
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Sumayah A Aljenedil
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Hind AlHumaidan
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Abdullah Al-Ashwal
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Abdulraof Almahfouz
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Shahd Algorashi
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Ali Almasood
- Heart Center Department, King Faisal Specialist Hospital and Research Center, Riyadh; Department of Medicine, Alfaisal University College of Medicine, Riyadh.
| | - Omar J Baqal
- Department of Medicine, Mayo Clinic Arizona, Phoenix, AZ.
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Qu L, Wang C, Xu H, Li L, Liu Y, Wan Q, Xu K. Atractylodin targets GLA to regulate D-mannose metabolism to inhibit osteogenic differentiation of human valve interstitial cells and ameliorate aortic valve calcification. Phytother Res 2023; 37:477-489. [PMID: 36199227 DOI: 10.1002/ptr.7628] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 08/22/2022] [Accepted: 09/03/2022] [Indexed: 11/07/2022]
Abstract
Atractylodin (ATL) has been reported to exert anti-inflammatory effects. Osteogenic changes induced by inflammation in valve interstitial cells (VICs) play a key role in the development of calcified aortic valve disease (CAVD). This study aimed to investigate the anti-calcification effects of ATL on aortic valves. Human VICs (hVICs) were exposed to osteogenic induction medium (OM) containing ATL to investigate cell viability, osteogenic gene and protein expression, and anti-calcification effects. Gas chromatography-mass spectroscopy (GC-MS) metabolomics analysis was used to detect changes in the metabolites of hVICs stimulated with OM before and after ATL administration. The compound-reaction-enzyme-gene network was used to identify drug targets. Gene interference was used to verify the targets. ApoE-/- mice fed a high-fat (HF) diet were used to evaluate the inhibition of aortic valve calcification by ATL. Treatment with 20 μM ATL in OM prevented calcified nodule accumulation and decreases in the gene and protein expression levels of ALP, RUNX2, and IL-1β. Differential metabolite analysis showed that D-mannose was highly associated with the anti-calcification effect of ATL. The addition of D-mannose prevented calcified nodule accumulation and inhibited succinate-mediated HIF-1α activation and IL-1β production. The target of ATL was identified as GLA. Silencing of the GLA gene (si-GLA) reversed the anti-osteogenic differentiation of ATL. In vivo, ATL ameliorated aortic valve calcification by preventing decreases in GLA expression and the up-regulation of IL-1β expression synchronously. In conclusion, ATL is a potential drug for the treatment of CAVD by targeting GLA to regulate D-mannose metabolism, thereby inhibiting succinate-mediated HIF-1α activation and IL-1β production.
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Affiliation(s)
- Linghang Qu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Chunli Wang
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Haiying Xu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Lanqing Li
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
| | - Yanju Liu
- College of Pharmacy, Hubei University of Chinese Medicine, Wuhan, China
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Wang L, Guo J, Tian Z, Seery S, Jin Y, Zhang S. Developing a Hybrid Risk Assessment Tool for Familial Hypercholesterolemia: A Machine Learning Study of Chinese Arteriosclerotic Cardiovascular Disease Patients. Front Cardiovasc Med 2022; 9:893986. [PMID: 35990942 PMCID: PMC9381985 DOI: 10.3389/fcvm.2022.893986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/22/2022] [Indexed: 11/15/2022] Open
Abstract
Background Familial hypercholesterolemia (FH) is an autosomal-dominant genetic disorder with a high risk of premature arteriosclerotic cardiovascular disease (ASCVD). There are many alternative risk assessment tools, for example, DLCN, although their sensitivity and specificity vary among specific populations. We aimed to assess the risk discovery performance of a hybrid model consisting of existing FH risk assessment tools and machine learning (ML) methods, based on the Chinese patients with ASCVD. Materials and Methods In total, 5,597 primary patients with ASCVD were assessed for FH risk using 11 tools. The three best performing tools were hybridized through a voting strategy. ML models were set according to hybrid results to create a hybrid FH risk assessment tool (HFHRAT). PDP and ICE were adopted to interpret black box features. Results After hybridizing the mDLCN, Taiwan criteria, and DLCN, the HFHRAT was taken as a stacking ensemble method (AUC_class[94.85 ± 0.47], AUC_prob[98.66 ± 0.27]). The interpretation of HFHRAT suggests that patients aged <75 years with LDL-c >4 mmol/L were more likely to be at risk of developing FH. Conclusion The HFHRAT has provided a median of the three tools, which could reduce the false-negative rate associated with existing tools and prevent the development of atherosclerosis. The hybrid tool could satisfy the need for a risk assessment tool for specific populations.
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Affiliation(s)
- Lei Wang
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jian Guo
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- State Key Laboratory of Complex Severe and Rare Diseases, Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhuang Tian
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Samuel Seery
- Department of Humanities and Social Sciences, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ye Jin
- State Key Laboratory of Complex Severe and Rare Diseases, Medical Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shuyang Zhang
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- *Correspondence: Shuyang Zhang,
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Bassareo PP, O’Brien ST, Dunne E, Duignan S, Martino E, Martino F, Mcmahon CJ. Should We Be Screening for Ischaemic Heart Disease Earlier in Childhood? CHILDREN 2022; 9:children9070982. [PMID: 35883966 PMCID: PMC9320497 DOI: 10.3390/children9070982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/18/2022] [Accepted: 06/28/2022] [Indexed: 11/26/2022]
Abstract
Ischaemic heart disease is the most common cause of death in males and the second in the female gender. Yet we often only focus on identification and treatment of this foremost cause of death in adulthood. The review asks the question what form of coronary disease do we encounter in childhood, what predisposing factors give rise to atherosclerosis and what strategies in childhood could we employ to detect and reduce atherosclerosis development in later life.
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Affiliation(s)
- Pier Paolo Bassareo
- Mater Misercordiae Hospital, Mater, D07 R2WY Dublin, Ireland
- Children’s Health Ireland at Crumlin, D12 N512 Dublin, Ireland; (S.T.O.); (E.D.); (S.D.); (C.J.M.)
- School of Medicine, University College Dublin, Belfield, D04 V1W8 Dublin, Ireland
- Correspondence:
| | - Stephen T. O’Brien
- Children’s Health Ireland at Crumlin, D12 N512 Dublin, Ireland; (S.T.O.); (E.D.); (S.D.); (C.J.M.)
| | - Esme Dunne
- Children’s Health Ireland at Crumlin, D12 N512 Dublin, Ireland; (S.T.O.); (E.D.); (S.D.); (C.J.M.)
| | - Sophie Duignan
- Children’s Health Ireland at Crumlin, D12 N512 Dublin, Ireland; (S.T.O.); (E.D.); (S.D.); (C.J.M.)
| | - Eliana Martino
- Department of Paediatrics, La Sapienza University, 00185 Roma, Italy; (E.M.); (F.M.)
| | - Francesco Martino
- Department of Paediatrics, La Sapienza University, 00185 Roma, Italy; (E.M.); (F.M.)
| | - Colin J. Mcmahon
- Children’s Health Ireland at Crumlin, D12 N512 Dublin, Ireland; (S.T.O.); (E.D.); (S.D.); (C.J.M.)
- School of Medicine, University College Dublin, Belfield, D04 V1W8 Dublin, Ireland
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Hu H, Shu T, Ma J, Chen R, Wang J, Wang S, Lin S, Chen X. Two Novel Disease-Causing Mutations in the LDLR of Familial Hypercholesterolemia. Front Genet 2022; 12:762587. [PMID: 34970301 PMCID: PMC8712701 DOI: 10.3389/fgene.2021.762587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 11/10/2021] [Indexed: 12/03/2022] Open
Abstract
As an autosomal dominant disorder, familial hypercholesterolemia (FH) is mainly caused by pathogenic mutations in lipid metabolism-related genes. The aim of this study is to investigate the genetic mutations in FH patients and verify their pathogenicity. First of all, a pedigree investigation was conducted in one family diagnosed with FH using the Dutch Lipid Clinic Network criteria. The high-throughput sequencing was performed on three family members to explore genetic mutations. The effects of low-density lipoprotein receptor (LDLR) variants on their expression levels and activity were further validated by silico analysis and functional studies. The results revealed that LDLC levels of the proband and his daughter were abnormally elevated. The whole-exome sequencing and Sanger sequencing were used to confirm that there were two LDLR missense mutations (LDLR c.226 G > C, c.1003 G > T) in this family. Bioinformatic analysis (Mutationtaster) indicated that these two mutations might be disease-causing variants. In vitro experiments suggested that LDLR c.226 G > C and c.1003 G > T could attenuate the uptake of Dil-LDL by LDLR. In conclusion, the LDLR c.226 G > C and c.1003 G > T variants might be pathogenic for FH by causing uptake dysfunction of the LDLR.
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Affiliation(s)
- Haochang Hu
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
| | - Tian Shu
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
| | - Jun Ma
- Department of Medical Ultrasonics, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Ruoyu Chen
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
| | - Jian Wang
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
| | | | - Shaoyi Lin
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
| | - Xiaomin Chen
- Department of Cardiology, Ningbo First Hospital, Ningbo, China
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Hu H, Chen R, Hu Y, Wang J, Lin S, Chen X. The LDLR c.501C>A is a disease-causing variant in familial hypercholesterolemia. Lipids Health Dis 2021; 20:101. [PMID: 34511120 PMCID: PMC8436568 DOI: 10.1186/s12944-021-01536-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/31/2021] [Indexed: 12/23/2022] Open
Abstract
Background As an autosomal dominant disorder, familial hypercholesterolemia (FH) is mainly attributed to disease-causing variants in the low-density lipoprotein receptor (LDLR) gene. The aim of this study was to explore the molecular mechanism of LDLR c.501C>A variant in FH and assess the efficacy of proprotein convertase subtilisin kexin type 9 (PCSK9) inhibitor treatment for FH patients. Methods The whole-exome sequencing was performed on two families to identify disease-causing variants, which were verified by Sanger sequencing. The function of LDLR variant was further explored in HEK293 cells by Western Blot and confocal microscopy. Besides, the therapeutic effects of PCSK9 inhibitor treatment for two probands were assessed for 3 months. Results All members of the two families with the LDLR c.501C>A variant showed high levels of LDLC. The relationship between the clinical phenotype and LDLR variants was confirmed in the current study. Both in silico and in vitro analyses showed that LDLR c.501C>A variant decreased LDLR expression and LDL uptake. PCSK9 inhibitor treatment lowered the lipid level in proband 1 by 24.91%. However, the treatment was ineffective for proband 2. A follow-up study revealed that the PCSK9 inhibitor treatment had low ability of lipid-lowering effect in the patients. Conclusions LDLR c.501C>A variant might be pathogenic for FH. The PCSK9 inhibitor therapy is not a highly effective option for treatment of FH patients with LDLR c.501C>A variant. Supplementary Information The online version contains supplementary material available at 10.1186/s12944-021-01536-3.
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Affiliation(s)
- Haochang Hu
- School of Medicine, Ningbo University, Ningbo, Zhejiang, China.,Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China
| | - Ruoyu Chen
- School of Medicine, Ningbo University, Ningbo, Zhejiang, China.,Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China
| | - Yingchu Hu
- Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China
| | - Jian Wang
- Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China
| | - Shaoyi Lin
- School of Medicine, Ningbo University, Ningbo, Zhejiang, China. .,Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China.
| | - Xiaomin Chen
- School of Medicine, Ningbo University, Ningbo, Zhejiang, China. .,Department of Cardiology, Ningbo First Hospital, Ningbo, Zhejiang, China.
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