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van der Ham M, Gerrits J, Prinsen B, van Hasselt P, Fuchs S, Jans J, Willems A, de Sain-van der Velden M. UPLC-Orbitrap-HRMS application for analysis of plasma sterols. Anal Chim Acta 2024; 1296:342347. [PMID: 38401937 DOI: 10.1016/j.aca.2024.342347] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/11/2024] [Accepted: 02/04/2024] [Indexed: 02/26/2024]
Abstract
Correct identification and quantification of different sterol biomarkers can be used as a first-line diagnostic approach for inherited metabolic disorders (IMD). The main drawbacks of current methodologies are related to lack of selectivity and sensitivity for some of these compounds. To address this, we developed and validated two sensitive and selective assays for quantification of six cholesterol biosynthesis pathway intermediates (total amount (free and esterified form) of 7-dehydrocholesterol (7-DHC), 8-dehydrocholesterol (8-DHC), desmosterol, lathosterol, lanosterol and cholestanol), two phytosterols (total amount (free and esterified form) of campesterol and sitosterol) and free form of two oxysterols (7-ketocholesterol (7-KC) and 3β,5α,6β-cholestane-triol (C-triol). For quantification of four cholesterol intermediates we based our analytical approach on sterol derivatization with 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD). Quantification of all analytes is performed using UPLC coupled to an Orbitrap high resolution mass spectrometry (HRMS) system, with detection of target ions through full scan acquisition using positive atmospheric pressure chemical ionization (APCI) mode. UPLC and MS parameters were optimized to achieve high sensitivity and selectivity. Analog stable isotope labeled for each compound was used for proper quantification and correction for recovery, matrix effects and process efficiency. Precision (2.4%-12.3% inter-assay variation), lower limit of quantification (0.027 nM-50.5 nM) and linearity (5.5 μM (R2 0.999) - 72.3 μM (R2 0.997)) for phyto- and oxysterols were determined. The diagnostic potential of these two assays in a cohort of patients (n = 31, 50 samples) diagnosed with IMD affecting cholesterol and lysosomal/peroxisomal homeostasis is demonstrated.
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Affiliation(s)
- Maria van der Ham
- Section Metabolic Diagnostics, Department of Genetics, University Medical Centre Utrecht, the Netherlands
| | - Johan Gerrits
- Section Metabolic Diagnostics, Department of Genetics, University Medical Centre Utrecht, the Netherlands
| | - Berthil Prinsen
- Section Metabolic Diagnostics, Department of Genetics, University Medical Centre Utrecht, the Netherlands
| | - Peter van Hasselt
- Section of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands
| | - Sabine Fuchs
- Section of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands
| | - Judith Jans
- Section Metabolic Diagnostics, Department of Genetics, University Medical Centre Utrecht, the Netherlands
| | - Anke Willems
- Section Metabolic Diagnostics, Department of Genetics, University Medical Centre Utrecht, the Netherlands
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Barco S, Verly I, Corrias MV, Sorrentino S, Conte M, Tripodi G, Tytgat G, van Kuilenburg A, van der Ham M, de Sain-van der Velden M, Garaventa A, Cangemi G. Plasma free metanephrines for diagnosis of neuroblastoma patients. Clin Biochem 2019; 66:57-62. [DOI: 10.1016/j.clinbiochem.2019.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/31/2019] [Accepted: 02/25/2019] [Indexed: 12/31/2022]
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Žigman T, Petković Ramadža D, Lušić M, Zekušić M, Ninković D, Gardijan D, Potočki K, Omerza L, Beljan L, Žarković K, Kerkhof J, Ljubojević M, de Sain-van der Velden M, Vuković J, Fumić K, Sadiković B, Barić I. Hypogammaglobulinemia and imaging features in a patient with infantile free sialic acid storage disease (ISSD) and a novel mutation in the SLC17A5 gene. J Pediatr Endocrinol Metab 2018; 31:1155-1159. [PMID: 30243016 DOI: 10.1515/jpem-2017-0397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 07/16/2018] [Indexed: 11/15/2022]
Abstract
Background Infantile free sialic acid storage disease (ISSD) is a severe multisystemic disorder characterized by the accumulation of free sialic acid in lysosomes. Case presentation The patient presented prenatally with fetal ascites and large scrotal hernias, without pleural or pericardial effusion. During the infantile period, he was diagnosed with permanent isolated immunoglobulin G (IgG) hypogammaglobulinemia, which thus far has rarely been associated with ISSD. The analysis of the SLC17A5 gene revealed a novel homozygous 94 bp gene deletion. We further provide a detailed description of pre- and postnatal clinical and radiographic findings. Conclusions Fetal ascites could be the first sign of several lysosomal storage diseases (LSDs), including ISSD. The analysis of LSD gene panels is an effective approach to diagnosis in the case of non-specific symptoms and when specific biochemical tests are not easily available.
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Affiliation(s)
- Tamara Žigman
- Department of Pediatrics, University Hospital Center Zagreb, Kišpatićeva 12, 10000Zagreb, Croatia, Phone: +38512367740
| | - Danijela Petković Ramadža
- Department of Pediatrics, University Hospital Center Zagreb, Zagreb, Croatia.,University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Mario Lušić
- Department of Radiology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Marija Zekušić
- Department of Laboratory Diagnostics, University Hospital Center Zagreb, Zagreb, Croatia
| | - Dorotea Ninković
- Department of Pediatrics, University Hospital Center Zagreb, Zagreb, Croatia.,University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Danilo Gardijan
- Department of Radiology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Kristina Potočki
- University of Zagreb, School of Medicine, Zagreb, Croatia.,Department of Radiology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Lana Omerza
- Department of Pediatrics, University Hospital Center Zagreb, Zagreb, Croatia
| | - Lucija Beljan
- Department of Pathology and Cytology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Kamelija Žarković
- University of Zagreb, School of Medicine, Zagreb, Croatia.,Department of Pathology and Cytology, University Hospital Center Zagreb, Zagreb, Croatia
| | - Jennifer Kerkhof
- Department of Pathology and Laboratory Medicine, Western University, London Health Sciences Centre and St. Joseph's Health Care London, London Ontario, Canada
| | - Marija Ljubojević
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | | | - Jurica Vuković
- Department of Pediatrics, University Hospital Center Zagreb, Zagreb, Croatia.,University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Ksenija Fumić
- Department of Laboratory Diagnostics, University Hospital Center Zagreb, Zagreb, Croatia
| | - Bekim Sadiković
- Department of Pathology and Laboratory Medicine, Western University, London Health Sciences Centre and St. Joseph's Health Care London, London Ontario, Canada
| | - Ivo Barić
- Department of Pediatrics, University Hospital Center Zagreb, Zagreb, Croatia.,University of Zagreb, School of Medicine, Zagreb, Croatia
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Diekman E, de Sain-van der Velden M, Waterham H, Kluijtmans L, Schielen P, van Veen EB, Ferdinandusse S, Wijburg F, Visser G. The Newborn Screening Paradox: Sensitivity vs. Overdiagnosis in VLCAD Deficiency. JIMD Rep 2015; 27:101-6. [PMID: 26453363 DOI: 10.1007/8904_2015_476] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 06/11/2015] [Accepted: 06/12/2015] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE To improve the efficacy of newborn screening (NBS) for very long chain acyl-CoA dehydrogenase deficiency (VLCADD). PATIENTS AND METHODS Data on all dried blood spots collected by the Dutch NBS from October 2007 to 2010 (742.728) were included. Based solely on the C14:1 levels (cutoff ≥0.8 μmol/L), six newborns with VLCADD had been identified through NBS during this period. The ratio of C14:1 over C2 was calculated. DNA of all blood spots with a C14:1/C2 ratio of ≥0.020 was isolated and sequenced. Children homozygous or compound heterozygous for mutations in the ACADVL gene were traced back and invited for detailed clinical, biochemical, and genetic evaluation. RESULTS Retrospective analysis based on the C14:1/C2 ratio with a cutoff of ≥0.020 identified an additional five children with known ACADVL mutations and low enzymatic activity. All were still asymptomatic at the time of diagnosis (age 2-5 years). Increasing the cutoff to ≥0.023 resulted in a sensitivity of 93% and a positive predictive value of 37%. The sensitivity of the previously used screening approach (C14:1 ≥0.8) was 50%. CONCLUSION This study shows that the ratio C14:1/C2 is a more sensitive marker than C14:1 for identifying VLCADD patients in NBS. However, as these patients were all asymptomatic at the time of diagnosis, this suggests that a more sensitive screening approach may also identify individuals who may never develop clinical disease. Long-term follow-up studies are needed to establish the risk of these VLCADD-deficient individuals for developing clinical signs and symptoms.
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Affiliation(s)
- Eugene Diekman
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Diseases, Emma Children's Hospital, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
- Department of Paediatric Gastroenterology and Metabolic Diseases, Wilhelmina Children's Hospital UMC Utrecht, Utrecht, The Netherlands
| | | | - Hans Waterham
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Diseases, Emma Children's Hospital, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Leo Kluijtmans
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Peter Schielen
- National Institute for Public Health and the Environment (RIVM), Reference Laboratory for Pre- and Neonatal Screening, Bilthoven, The Netherlands
| | - Evert Ben van Veen
- National Institute for Public Health and the Environment (RIVM), Reference Laboratory for Pre- and Neonatal Screening, Bilthoven, The Netherlands
| | - Sacha Ferdinandusse
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Diseases, Emma Children's Hospital, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Frits Wijburg
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Diseases, Emma Children's Hospital, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
| | - Gepke Visser
- Department of Paediatric Gastroenterology and Metabolic Diseases, Wilhelmina Children's Hospital UMC Utrecht, Utrecht, The Netherlands.
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Jeyaratnam J, Haar NT, de Sain-van der Velden M, van Gijn M, Frenkel J. Diagnostic value of urinary mevalonic acid excretion in mevalonate kinase deficiency (MKD). Pediatr Rheumatol Online J 2014. [PMCID: PMC4184310 DOI: 10.1186/1546-0096-12-s1-p75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Thors VS, Vastert SJ, Wulffraat N, van Royen A, Frenkel J, de Sain-van der Velden M, de Koning TJ. Periodic fever in MVK deficiency: a patient initially diagnosed with incomplete Kawasaki disease. Pediatrics 2014; 133:e461-5. [PMID: 24470648 DOI: 10.1542/peds.2012-1372] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Mevalonate kinase deficiency (MKD) is a rare autosomal recessive disorder causing 1 of 2 phenotypes, hyperimmunoglobulin D syndrome and mevalonic aciduria, presenting with recurrent fever episodes, often starting in infancy, and sometimes evoked by stress or vaccinations. This autoinflammatory disease is caused by mutations encoding the mevalonate kinase (MVK) gene and is classified in the group of periodic fever syndromes. There is often a considerable delay in the diagnosis among pediatric patients with recurrent episodes of fever. We present a case of an 8-week-old girl with fever of unknown origin and a marked systemic inflammatory response. After excluding infections, a tentative diagnosis of incomplete Kawasaki syndrome was made, based on the finding of dilated coronary arteries on cardiac ultrasound and fever, and she was treated accordingly. However, the episodes of fever recurred, and alternative diagnoses were considered, which eventually led to the finding of increased excretion of mevalonic acid in urine. The diagnosis of MKD was confirmed by mutation analysis of the MVK gene. This case shows that the initial presentation of MKD can be indistinguishable from incomplete Kawasaki syndrome. When fever recurs in Kawasaki syndrome, other (auto-)inflammatory diseases must be ruled out to avoid inappropriate diagnostic procedures, ineffective interventions, and treatment delay.
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van Damme M, Zeilmaker T, Elberse J, Andel A, de Sain-van der Velden M, van den Ackerveken G. Downy mildew resistance in Arabidopsis by mutation of HOMOSERINE KINASE. Plant Cell 2009; 21:2179-89. [PMID: 19622802 PMCID: PMC2729605 DOI: 10.1105/tpc.109.066811] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Plant disease resistance is commonly triggered by early pathogen recognition and activation of immunity. An alternative form of resistance is mediated by recessive downy mildew resistant 1 (dmr1) alleles in Arabidopsis thaliana. Map-based cloning revealed that DMR1 encodes homoserine kinase (HSK). Six independent dmr1 mutants each carry a different amino acid substitution in the HSK protein. Amino acid analysis revealed that dmr1 mutants contain high levels of homoserine that is undetectable in wild-type plants. Surprisingly, the level of amino acids downstream in the aspartate (Asp) pathway was not reduced in dmr1 mutants. Exogenous homoserine does not directly affect pathogen growth but induces resistance when infiltrated in Arabidopsis. We provide evidence that homoserine accumulation in the chloroplast triggers a novel form of downy mildew resistance that is independent of known immune responses.
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Affiliation(s)
- Mireille van Damme
- Plant-Microbe Interactions, Department of Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
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Koeners MP, van Faassen EE, Wesseling S, de Sain-van der Velden M, Koomans HA, Braam B, Joles JA. Maternal supplementation with citrulline increases renal nitric oxide in young spontaneously hypertensive rats and has long-term antihypertensive effects. Hypertension 2007; 50:1077-84. [PMID: 17938381 DOI: 10.1161/hypertensionaha.107.095794] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
NO deficiency is associated with development of hypertension. Defects in the renal citrulline-arginine pathway or arginine reabsorption potentially reduce renal NO in prehypertensive spontaneously hypertensive rats (SHRs). Hence, we investigated genes related to the citrulline-arginine pathway or arginine reabsorption, amino acid pools, and renal NO in 2-week-old prehypertensive SHRs. In addition, because perinatally supporting NO availability reduces blood pressure in SHRs, we supplemented SHR dams during pregnancy and lactation with citrulline, the rate-limiting amino acid for arginine synthesis. In female offspring, gene expression of argininosuccinate synthase (involved in renal arginine synthesis) and renal cationic amino acid Y-transporter (involved in arginine reabsorption) were both decreased in 2-day and 2-week SHRs compared with normotensive WKY, although no abnormalities in amino acid pools were observed. In addition, 2-week-old female SHRs had much less NO in their kidneys (0.46+/-0.01 versus 0.68+/-0.05 nmol/g of kidney weight, respectively; P<0.001) but not in their heart. Furthermore, perinatal supplementation with citrulline increased renal NO to 0.59+/-0.02 nmol/g of kidney weight (P<0.001) at 2 weeks and persistently ameliorated the development of hypertension in females and until 20 weeks in male SHR offspring. Defects in both the renal citrulline-arginine pathway and in arginine reabsorption precede hypertension in SHRs. We propose that the reduced cationic amino acid transporter disables the developing SHR kidney to use arginine reabsorption to compensate for reduced arginine synthesis, resulting in organ-specific NO deficiency. This early renal deficiency and its adverse sequels can be corrected by perinatal citrulline supplementation persistently in female and transiently in male SHRs.
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Affiliation(s)
- Maarten P Koeners
- Department of Nephrology and Hypertension, University Medical Center, Utrecht, the Netherlands
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