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Coleman MF, Cotul EK, Pfeil AJ, Devericks EN, Safdar MH, Monteiro M, Chen H, Ho AN, Attaar N, Malian HM, Kiesel VA, Ramos A, Smith M, Panchal H, Mailloux A, Teegarden D, Hursting SD, Wendt MK. Hypoxia-mediated repression of pyruvate carboxylase drives immunosuppression. Breast Cancer Res 2024; 26:96. [PMID: 38849928 PMCID: PMC11161980 DOI: 10.1186/s13058-024-01854-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 06/04/2024] [Indexed: 06/09/2024] Open
Abstract
BACKGROUND Metabolic plasticity mediates breast cancer survival, growth, and immune evasion during metastasis. However, how tumor cell metabolism is influenced by and feeds back to regulate breast cancer progression are not fully understood. We identify hypoxia-mediated suppression of pyruvate carboxylase (PC), and subsequent induction of lactate production, as a metabolic regulator of immunosuppression. METHODS We used qPCR, immunoblot, and reporter assays to characterize repression of PC in hypoxic primary tumors. Steady state metabolomics were used to identify changes in metabolite pools upon PC depletion. In vivo tumor growth and metastasis assays were used to evaluate the impact of PC manipulation and pharmacologic inhibition of lactate transporters. Immunohistochemistry, flow cytometry, and global gene expression analyzes of tumor tissue were employed to characterize the impact of PC depletion on tumor immunity. RESULTS PC is essential for metastatic colonization of the lungs. In contrast, depletion of PC in tumor cells promotes primary tumor growth. This effect was only observed in immune competent animals, supporting the hypothesis that repression of PC can suppress anti-tumor immunity. Exploring key differences between the pulmonary and mammary environments, we demonstrate that hypoxia potently downregulated PC. In the absence of PC, tumor cells produce more lactate and undergo less oxidative phosphorylation. Inhibition of lactate metabolism was sufficient to restore T cell populations to PC-depleted mammary tumors. CONCLUSIONS We present a dimorphic role for PC in primary mammary tumors vs. pulmonary metastases. These findings highlight a key contextual role for PC-directed lactate production as a metabolic nexus connecting hypoxia and antitumor immunity.
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Affiliation(s)
- Michael F Coleman
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Eylem Kulkoyluoglu Cotul
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, USA
| | - Alexander J Pfeil
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Emily N Devericks
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Muhammad H Safdar
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, USA
| | - Marvis Monteiro
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, USA
| | - Hao Chen
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, USA
| | - Alyssa N Ho
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Numair Attaar
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Hannah M Malian
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Violet A Kiesel
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alexis Ramos
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - Matthew Smith
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - Heena Panchal
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - Adam Mailloux
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA
| | - Dorothy Teegarden
- Purdue University Institute for Cancer Research, Purdue University, West Lafayette, IN, USA
- Department of Nutrition Science, Purdue University, West Lafayette, IN, USA
| | - Stephen D Hursting
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC, USA
| | - Michael K Wendt
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN, USA.
- Purdue University Institute for Cancer Research, Purdue University, West Lafayette, IN, USA.
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, USA.
- Department of Internal Medicine, University of Iowa, Iowa City, IA, USA.
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2
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Rivera Nieves AM, Wauford BM, Fu A. Mitochondrial bioenergetics, metabolism, and beyond in pancreatic β-cells and diabetes. Front Mol Biosci 2024; 11:1354199. [PMID: 38404962 PMCID: PMC10884328 DOI: 10.3389/fmolb.2024.1354199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 01/17/2024] [Indexed: 02/27/2024] Open
Abstract
In Type 1 and Type 2 diabetes, pancreatic β-cell survival and function are impaired. Additional etiologies of diabetes include dysfunction in insulin-sensing hepatic, muscle, and adipose tissues as well as immune cells. An important determinant of metabolic health across these various tissues is mitochondria function and structure. This review focuses on the role of mitochondria in diabetes pathogenesis, with a specific emphasis on pancreatic β-cells. These dynamic organelles are obligate for β-cell survival, function, replication, insulin production, and control over insulin release. Therefore, it is not surprising that mitochondria are severely defective in diabetic contexts. Mitochondrial dysfunction poses challenges to assess in cause-effect studies, prompting us to assemble and deliberate the evidence for mitochondria dysfunction as a cause or consequence of diabetes. Understanding the precise molecular mechanisms underlying mitochondrial dysfunction in diabetes and identifying therapeutic strategies to restore mitochondrial homeostasis and enhance β-cell function are active and expanding areas of research. In summary, this review examines the multidimensional role of mitochondria in diabetes, focusing on pancreatic β-cells and highlighting the significance of mitochondrial metabolism, bioenergetics, calcium, dynamics, and mitophagy in the pathophysiology of diabetes. We describe the effects of diabetes-related gluco/lipotoxic, oxidative and inflammation stress on β-cell mitochondria, as well as the role played by mitochondria on the pathologic outcomes of these stress paradigms. By examining these aspects, we provide updated insights and highlight areas where further research is required for a deeper molecular understanding of the role of mitochondria in β-cells and diabetes.
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Affiliation(s)
- Alejandra María Rivera Nieves
- Diabetes Center of Excellence, University of Massachusetts Chan Medical School, Worcester, MA, United States
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Brian Michael Wauford
- Diabetes Center of Excellence, University of Massachusetts Chan Medical School, Worcester, MA, United States
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, United States
| | - Accalia Fu
- Diabetes Center of Excellence, University of Massachusetts Chan Medical School, Worcester, MA, United States
- Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, United States
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3
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Quarta A, Iannucci D, Guarino M, Blasetti A, Chiarelli F. Hypoglycemia in Children: Major Endocrine-Metabolic Causes and Novel Therapeutic Perspectives. Nutrients 2023; 15:3544. [PMID: 37630734 PMCID: PMC10459037 DOI: 10.3390/nu15163544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/07/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Hypoglycemia is due to defects in the metabolic systems involved in the transition from the fed to the fasting state or in the hormone control of these systems. In children, hypoglycemia is considered a metabolic-endocrine emergency, because it may lead to brain injury, permanent neurological sequelae and, in rare cases, death. Symptoms are nonspecific, particularly in infants and young children. Diagnosis is based on laboratory investigations during a hypoglycemic event, but it may also require biochemical tests between episodes, dynamic endocrine tests and molecular genetics. This narrative review presents the age-related definitions of hypoglycemia, its pathophysiology and main causes, and discusses the current diagnostic and modern therapeutic approaches.
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Affiliation(s)
| | | | | | | | - Francesco Chiarelli
- Department of Pediatrics, University of Chieti—Pescara, Gabriele D’Annunzio, 66100 Chieti, Italy; (A.Q.); (D.I.); (M.G.); (A.B.)
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4
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Schmelter C, Fomo KN, Brueck A, Perumal N, Markowitsch SD, Govind G, Speck T, Pfeiffer N, Grus FH. Glaucoma-Associated CDR1 Peptide Promotes RGC Survival in Retinal Explants through Molecular Interaction with Acidic Leucine Rich Nuclear Phosphoprotein 32A (ANP32A). Biomolecules 2023; 13:1161. [PMID: 37509196 PMCID: PMC10377047 DOI: 10.3390/biom13071161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/06/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
Glaucoma is a complex, multifactorial optic neuropathy mainly characterized by the progressive loss of retinal ganglion cells (RGCs) and their axons, resulting in a decline of visual function. The pathogenic molecular mechanism of glaucoma is still not well understood, and therapeutic strategies specifically addressing the neurodegenerative component of this ocular disease are urgently needed. Novel immunotherapeutics might overcome this problem by targeting specific molecular structures in the retina and providing direct neuroprotection via different modes of action. Within the scope of this research, the present study showed for the first time beneficial effects of the synthetic CDR1 peptide SCTGTSSDVGGYNYVSWYQ on the viability of RGCs ex vivo in a concentration-dependent manner compared to untreated control explants (CTRL, 50 µg/mL: p < 0.05 and 100 µg/mL: p < 0.001). Thereby, this specific peptide was identified first as a potential biomarker candidate in the serum of glaucoma patients and was significantly lower expressed in systemic IgG molecules compared to healthy control subjects. Furthermore, MS-based co-immunoprecipitation experiments confirmed the specific interaction of synthetic CDR1 with retinal acidic leucine-rich nuclear phosphoprotein 32A (ANP32A; p < 0.001 and log2 fold change > 3), which is a highly expressed protein in neurological tissues with multifactorial biological functions. In silico binding prediction analysis revealed the N-terminal leucine-rich repeat (LRR) domain of ANP32A as a significant binding site for synthetic CDR1, which was previously reported as an important docking site for protein-protein interactions (PPI). In accordance with these findings, quantitative proteomic analysis of the retinae ± CDR1 treatment resulted in the identification of 25 protein markers, which were significantly differentially distributed between both experimental groups (CTRL and CDR1, p < 0.05). Particularly, acetyl-CoA biosynthesis I-related enzymes (e.g., DLAT and PDHA1), as well as cytoskeleton-regulating proteins (e.g., MSN), were highly expressed by synthetic CDR1 treatment in the retina; on the contrary, direct ANP32A-interacting proteins (e.g., NME1 and PPP2R4), as well as neurodegenerative-related markers (e.g., CEND1), were identified with significant lower abundancy in the CDR1-treated retinae compared to CTRL. Furthermore, retinal protein phosphorylation and histone acetylation were also affected by synthetic CDR1, which are both partially controlled by ANP32A. In conclusion, the synthetic CDR1 peptide provides a great translational potential for the treatment of glaucoma in the future by eliciting its neuroprotective mechanism via specific interaction with ANP32A's N terminal LRR domain.
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Affiliation(s)
- Carsten Schmelter
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
| | - Kristian Nzogang Fomo
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
| | - Alina Brueck
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
| | - Natarajan Perumal
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
| | - Sascha D. Markowitsch
- Department of Urology and Pediatric Urology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany;
| | - Gokul Govind
- Institute of Physics, Johannes Gutenberg University, 55131 Mainz, Germany; (G.G.)
| | - Thomas Speck
- Institute of Physics, Johannes Gutenberg University, 55131 Mainz, Germany; (G.G.)
| | - Norbert Pfeiffer
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
| | - Franz H. Grus
- Department of Experimental and Translational Ophthalmology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany; (C.S.); (K.N.F.); (A.B.); (N.P.); (N.P.)
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Xue M. Case Report: Prenatal neurological injury in a neonate with pyruvate carboxylase deficiency type B. Front Endocrinol (Lausanne) 2023; 14:1199590. [PMID: 37484962 PMCID: PMC10360024 DOI: 10.3389/fendo.2023.1199590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/21/2023] [Indexed: 07/25/2023] Open
Abstract
Background Pyruvate carboxylase (PC) is a key enzyme for gluconeogenesis. PC deficiency (PCD) is an extremely rare autosomal recessive metabolic disease and is divided into three types. Type B PCD is clinically featured by lactic acidosis, hyperammonemia, hypercitrullinemia, hypotonia, abnormal movement, and seizures. Case presentation Here, we report the first case of type B PCD in China, presenting with intractable lactic acidosis shortly after birth. A compound heterozygous mutation in the PC gene was identified by whole-exome sequencing, NM_001040716.2: c.1154_1155del and c.152G>A, which were inherited from her asymptomatic parents, respectively. Furthermore, prenatal neuroradiological presentations including widened posterior horns of lateral ventricles, huge subependymal cysts, and increased biparietal diameter and head circumference were concerned. Symptomatic treatment was taken and the infant died at 26 days. Conclusion To our knowledge, this is the minimum gestational age (22w5d) that's when the prenatal onset of the neuroradiologic phenotype of PCD was observed. PCD has a poor prognosis and lacks an effective treatment, so this paper is shared to highlight the importance of PCD prenatal diagnosis in the absence of family history.
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Affiliation(s)
- Mei Xue
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
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6
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Generation of an induced pluripotent stem cell line (SHCDNi007-A) from a patient with pyruvate carboxylase deficiency carrying compound heterozygous (c.182 T > C/ c.2581G > A) variants in PC. Stem Cell Res 2023; 66:102997. [PMID: 36508859 DOI: 10.1016/j.scr.2022.102997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/18/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022] Open
Abstract
Pyruvate carboxylase (PC) deficiency (PCD), due to biallelic PC variants, is a rare inherited metabolic disease, which is characterized by seizures, global developmental delay, as well as lactic acidosis, and elevated plasma pyruvate and alanine levels in affected individuals. In the present study, a new induced pluripotent stem cell line (SHCDNi007-A) was generated from the peripheral blood mononuclear cells of a 2-month-old male infant with biallelic PC mutations c.(182 T > C;2581G > A), i.e. p.(Ile61Thr;Val861Met). This cell line is expected to facilitate the in vitro modeling of the disease pathophysiology and the development of future therapeutics for PCD.
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7
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Tao D, Zhang H, Yang J, Niu H, Zhang J, Zeng M, Cheng S. PC Splice-Site Variant c.1825+5G>A Caused Intron Retention in a Patient With Pyruvate Carboxylase Deficiency: A Case Report. Front Pediatr 2022; 10:825515. [PMID: 35573952 PMCID: PMC9096210 DOI: 10.3389/fped.2022.825515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/28/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Pyruvate carboxylase deficiency (PCD; MIM#266150) is a rare autosomal recessive disorder characterized by a wide range of clinical features, including delayed neurodevelopment, elevated pyruvate levels, lactic acidosis, elevated ketone levels, and hyperammonemia. The pyruvate carboxylase (PC) gene was identified to be the disease-causing gene for PCD. A novel homozygous splice variant in the PC gene was identified in a Chinese boy, but the pathogenicity is still unclear. The objective of the present study was to determine the effect of this splice-site variant by reverse transcription analysis. METHODS We reported the clinical course of a 20-month-old Chinese pediatric patient who was diagnosed with PCD using whole-exome sequencing (WES). The effects of the variant on mRNA splicing were analyzed through the transcript analysis in vivo. RESULTS The results of metabolic blood and urine screening suggested PCD by employing tandem mass spectrometry. WES revealed a novel homozygous splice-site variant (c.1825+5G>A) in the PC gene. in vivo transcript analysis indicated that the splice-site variant caused the retention of 192 bp of the intron. CONCLUSION Thus, c.1825+5G>A was established as a pathogenic variant, thereby enriching the mutational spectrum of the PC gene and providing a basis for the genetic diagnosis of PCD.
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Affiliation(s)
- DongYing Tao
- Department of Pediatrics, XiJing Hospital, Fourth Military Medical University, Xi'an, China
| | - HuiQin Zhang
- Department of Pediatrics, XiJing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jingmin Yang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
| | - HuanHong Niu
- Department of Pediatrics, XiJing Hospital, Fourth Military Medical University, Xi'an, China
| | - JingJing Zhang
- Department of Pediatrics, XiJing Hospital, Fourth Military Medical University, Xi'an, China
| | - Minghua Zeng
- Medical Experiment and Training Center, Hanzhong Vocational and Technical College, Hanzhong, China
| | - ShengQuan Cheng
- Department of Pediatrics, XiJing Hospital, Fourth Military Medical University, Xi'an, China
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Hidalgo J, Campoverde L, Ortiz JF, Ruxmohan S, Eissa-Garcés A. A Unique Case of Pyruvate Carboxylase Deficiency. Cureus 2021; 13:e15042. [PMID: 34150393 PMCID: PMC8202815 DOI: 10.7759/cureus.15042] [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] [Indexed: 01/31/2023] Open
Abstract
Pyruvate carboxylase (PC) converts pyruvate to oxaloacetate, which is an important step in gluconeogenesis. Pyruvate carboxylase deficiency (PCD) is a rare inherited metabolic disorder characterized by movement disorders, neurologic disturbances, hypoglycemia, lactic acidosis, hyperammonemia, and elevated levels of pyruvate and alanine in plasma. The prognosis for PCD is poor. Most children die within the first six months of life, and those who survive longer have neurological damage and mental disability. This is due to the accumulation of lactic acid and toxic components in the blood. Here we describe the case of a 21-month-old male presenting with abnormal movements and new-onset seizures. His family history is relevant because of parental consanguinity. A genetic analysis showed a novel mutation, homozygous c. 2630A>G (p. Gln877Arg) variant, in the PC gene, a mutation not previously described in the English literature.
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Affiliation(s)
- Jessica Hidalgo
- Internal Medicine, Universidad San Francisco de Quito, Quito, ECU
| | | | - Juan Fernando Ortiz
- Neurology, Universidad San Francisco de Quito, Quito, ECU.,Neurology, Larkin Community Hospital, Miami, USA
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Wijngaard R, Perramón M, Parra-Robert M, Hidalgo S, Butrico G, Morales-Ruiz M, Zeng M, Casals E, Jiménez W, Fernández-Varo G, Shulman GI, Cline GW, Casals G. Validation of a Gas Chromatography-Mass Spectrometry Method for the Measurement of the Redox State Metabolic Ratios Lactate/Pyruvate and β-Hydroxybutyrate/Acetoacetate in Biological Samples. Int J Mol Sci 2021; 22:4752. [PMID: 33946157 PMCID: PMC8125771 DOI: 10.3390/ijms22094752] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/20/2021] [Accepted: 04/27/2021] [Indexed: 02/06/2023] Open
Abstract
The metabolic ratios lactate/pyruvate and β-hydroxybutyrate/acetoacetate are considered valuable tools to evaluate the in vivo redox cellular state by estimating the free NAD+/NADH in cytoplasm and mitochondria, respectively. The aim of the current study was to validate a gas-chromatography mass spectrometry method for simultaneous determination of the four metabolites in plasma and liver tissue. The procedure included an o-phenylenediamine microwave-assisted derivatization, followed by liquid-liquid extraction with ethyl acetate and silylation with bis(trimethylsilyl)trifluoroacetamide:trimethylchlorosilane 99:1. The calibration curves presented acceptable linearity, with a limit of quantification of 0.001 mM for pyruvate, β-hydroxybutyrate and acetoacetate and of 0.01 mM for lactate. The intra-day and inter-day accuracy and precision were within the European Medicines Agency's Guideline specifications. No significant differences were observed in the slope coefficient of three-point standard metabolite-spiked curves in plasma or liver and water, and acceptable recoveries were obtained in the metabolite-spiked samples. Applicability of the method was tested in precision-cut liver rat slices and also in HepG2 cells incubated under different experimental conditions challenging the redox state. In conclusion, the validated method presented good sensitivity, specificity and reproducibility in the quantification of lactate/pyruvate and β-hydroxybutyrate/acetate metabolites and may be useful in the evaluation of in vivo redox states.
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Affiliation(s)
- Robin Wijngaard
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
| | - Meritxell Perramón
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
| | - Marina Parra-Robert
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
| | - Susana Hidalgo
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
| | - Gina Butrico
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT 06510, USA; (G.B.); (G.I.S.); (G.W.C.)
| | - Manuel Morales-Ruiz
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
- Department of Biomedicine, University of Barcelona, 08036 Barcelona, Spain
- Working Group for the Biochemical Assessment of Hepatic Disease-SEQCML, 08036 Barcelona, Spain
| | - Muling Zeng
- School of Biotechnology and Health Sciences, Wuyi University, 99 Yingbing Middle Rd., Jiangmen 529020, China; (M.Z.); (E.C.)
| | - Eudald Casals
- School of Biotechnology and Health Sciences, Wuyi University, 99 Yingbing Middle Rd., Jiangmen 529020, China; (M.Z.); (E.C.)
| | - Wladimiro Jiménez
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
- Department of Biomedicine, University of Barcelona, 08036 Barcelona, Spain
| | - Guillermo Fernández-Varo
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
- Department of Biomedicine, University of Barcelona, 08036 Barcelona, Spain
| | - Gerald I. Shulman
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT 06510, USA; (G.B.); (G.I.S.); (G.W.C.)
| | - Gary W. Cline
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT 06510, USA; (G.B.); (G.I.S.); (G.W.C.)
| | - Gregori Casals
- Service of Biochemistry and Molecular Genetics, Hospital Clinic Universitari, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Carrer de Villarroel 170, 08036 Barcelona, Spain; (R.W.); (M.P.); (M.P.-R.); (S.H.); (M.M.-R.); (W.J.)
- Working Group for the Biochemical Assessment of Hepatic Disease-SEQCML, 08036 Barcelona, Spain
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10
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Sahdev N, Oji O, Babu A, Dutta Roy S. Case report of Takotsubo syndrome following seizures in a patient with pyruvate carboxylase deficiency. EUROPEAN HEART JOURNAL-CASE REPORTS 2021; 5:ytab011. [PMID: 34109288 PMCID: PMC8183661 DOI: 10.1093/ehjcr/ytab011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/15/2020] [Accepted: 01/07/2021] [Indexed: 12/01/2022]
Abstract
Background Takotsubo syndrome (TS) is defined as transient left ventricular dysfunction, which is often related to an emotional or physically stressful event. We describe a case of TS in a lady with pyruvate carboxylase deficiency (PCD). Pyruvate carboxylase deficiency is rare condition with the majority of those affected demonstrating signs of failure to thrive, recurrent seizures, and metabolic acidosis. To our knowledge, this is the first documented case of TS in an individual with PCD. Case summary This 28-year-old female presented to the emergency department after a tonic-clonic seizure. For 4 days prior to the presentation, she had been suffering from cough and pyrexia. On Day 2, she developed abdominal pain associated with tachycardia and hypotension, and an elevated troponin (791 ng/L). The echocardiogram showed a severely impaired left ventricular systolic function, regional wall motion abnormalities (RWMAs), and a visually estimated left ventricular ejection fraction of 25–30%. Eight days following admission her clinical state significantly improved, with a reduction troponin to 60 ng/L. A repeat echocardiogram on Day 9 showed complete resolution of cardiac function with no RWMAs. Following this, she was discharged from hospital the next day with a diagnosis of TS. Discussion This is the first case report of TS in a patient with PCD. In this case, multiple aetiologies of TS such as emotional and physical stress, seizures, and acute infection were considered. This case also highlights that TS should be an important differential diagnosis in patients presenting with cardiac symptoms.
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Affiliation(s)
- Nikhil Sahdev
- Cardiology Department, Homerton University Hospital, Homerton Row, Clapton, London E9 6SR, UK
| | - Onyedikachi Oji
- Cardiology Department, Homerton University Hospital, Homerton Row, Clapton, London E9 6SR, UK
| | - Aswin Babu
- Cardiology Department, Homerton University Hospital, Homerton Row, Clapton, London E9 6SR, UK
| | - Smita Dutta Roy
- Cardiology Department, Homerton University Hospital, Homerton Row, Clapton, London E9 6SR, UK
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11
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Mert S, Bulutoglu B, Chu C, Dylewski M, Lin FM, Yu YM, Yarmush ML, Sheridan RL, Uygun K. Multiorgan Metabolomics and Lipidomics Provide New Insights Into Fat Infiltration in the Liver, Muscle Wasting, and Liver-Muscle Crosstalk Following Burn Injury. J Burn Care Res 2020; 42:269-287. [PMID: 32877506 DOI: 10.1093/jbcr/iraa145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Burn injury mediated hypermetabolic syndrome leads to increased mortality among severe burn victims, due to liver failure and muscle wasting. Metabolic changes may persist up to 2 years following the injury. Thus, understanding the underlying mechanisms of the pathology is crucially important to develop appropriate therapeutic approaches. We present detailed metabolomic and lipidomic analyses of the liver and muscle tissues in a rat model with a 30% body surface area burn injury located at the dorsal skin. Three hundred and thirty-eight of 1587 detected metabolites and lipids in the liver and 119 of 1504 in the muscle tissue exhibited statistically significant alterations. We observed excessive accumulation of triacylglycerols, decreased levels of S-adenosylmethionine, increased levels of glutamine and xenobiotics in the liver tissue. Additionally, the levels of gluconeogenesis, glycolysis, and tricarboxylic acid cycle metabolites are generally decreased in the liver. On the other hand, burn injury muscle tissue exhibits increased levels of acyl-carnitines, alpha-hydroxyisovalerate, ophthalmate, alpha-hydroxybutyrate, and decreased levels of reduced glutathione. The results of this preliminary study provide compelling observations that liver and muscle tissues undergo distinctly different changes during hypermetabolism, possibly reflecting liver-muscle crosstalk. The liver and muscle tissues might be exacerbating each other's metabolic pathologies, via excessive utilization of certain metabolites produced by each other.
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Affiliation(s)
- Safak Mert
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Beyza Bulutoglu
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Christopher Chu
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Maggie Dylewski
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts
| | - Florence M Lin
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts
| | - Yong-Ming Yu
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
| | - Martin L Yarmush
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston.,Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey
| | - Robert L Sheridan
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts
| | - Korkut Uygun
- Burns Department, Shriners Hospitals for Children, Boston, Massachusetts.,Department of Surgery, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston
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12
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Lin Q, He Y, Wang X, Zhang Y, Hu M, Guo W, He Y, Zhang T, Lai L, Sun Z, Yi Z, Liu M, Chen Y. Targeting Pyruvate Carboxylase by a Small Molecule Suppresses Breast Cancer Progression. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903483. [PMID: 32382484 PMCID: PMC7201266 DOI: 10.1002/advs.201903483] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/14/2020] [Accepted: 02/24/2020] [Indexed: 05/29/2023]
Abstract
Rapid metabolism differentiates cancer cells from normal cells and relies on anaplerotic pathways. However, the mechanisms of anaplerosis-associated enzymes are rarely understood. The lack of potent and selective antimetabolism drugs restrains further clinical investigations. A small molecule ZY-444 ((N 4-((5-(4-(benzyloxy)phenyl)-2-thiophenyl)methyl)-N 2-isobutyl-2,4-pyrimidinediamine) is discovered to inhibit cancer cell proliferation specifically, having potent efficacies against tumor growth, metastasis, and recurrence. ZY-444 binds to cellular pyruvate carboxylase (PC), a key anaplerotic enzyme of the tricarboxylic acid cycle, and inactivates its catalytic activity. PC inhibition suppresses breast cancer growth and metastasis through inhibiting the Wnt/β-catenin/Snail signaling pathway. Lower PC expression in patient tumors is correlated with significant survival benefits. Comparative profiles of PC expression in cancer versus normal tissues implicate the tumor selectivity of ZY-444. Overall, ZY-444 holds promise therapeutically as an anti-cancer metabolism agent.
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Affiliation(s)
- Qingxiang Lin
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Yuan He
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
- Joint Center for Translational MedicineSouthern Medical University Affiliated Fengxian HospitalShanghai201499P. R. China
| | - Xue Wang
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Yong Zhang
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Meichun Hu
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Weikai Guo
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Yundong He
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Tao Zhang
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Li Lai
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Zhenliang Sun
- Joint Center for Translational MedicineSouthern Medical University Affiliated Fengxian HospitalShanghai201499P. R. China
| | - Zhengfang Yi
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
- Joint Center for Translational MedicineSouthern Medical University Affiliated Fengxian HospitalShanghai201499P. R. China
| | - Mingyao Liu
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
| | - Yihua Chen
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational MedicineShanghai Key Laboratory of Regulatory BiologyInstitute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241P. R. China
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13
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Sarabhai T, Roden M. Hungry for your alanine: when liver depends on muscle proteolysis. J Clin Invest 2019; 129:4563-4566. [PMID: 31545302 PMCID: PMC6819091 DOI: 10.1172/jci131931] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Fasting requires complex endocrine and metabolic interorgan crosstalk, which involves shifting from glucose to fatty acid oxidation, derived from adipose tissue lipolysis, in order to preserve glucose for the brain. The glucose-alanine (Cahill) cycle is critical for regenerating glucose. In this issue of JCI, Petersen et al. report on their use of an innovative stable isotope tracer method to show that skeletal muscle-derived alanine becomes rate controlling for hepatic mitochondrial oxidation and, in turn, for glucose production during prolonged fasting. These results provide new insight into skeletal muscle-liver metabolic crosstalk during the fed-to-fasting transition in humans.
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Affiliation(s)
- Theresia Sarabhai
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
- German Center for Diabetes Research, München-Neuherberg, Germany
| | - Michael Roden
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
- German Center for Diabetes Research, München-Neuherberg, Germany
- Division of Endocrinology and Diabetology, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
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14
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Cappel DA, Deja S, Duarte JAG, Kucejova B, Iñigo M, Fletcher JA, Fu X, Berglund ED, Liu T, Elmquist JK, Hammer S, Mishra P, Browning JD, Burgess SC. Pyruvate-Carboxylase-Mediated Anaplerosis Promotes Antioxidant Capacity by Sustaining TCA Cycle and Redox Metabolism in Liver. Cell Metab 2019; 29:1291-1305.e8. [PMID: 31006591 PMCID: PMC6585968 DOI: 10.1016/j.cmet.2019.03.014] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 01/12/2019] [Accepted: 03/26/2019] [Indexed: 01/09/2023]
Abstract
The hepatic TCA cycle supports oxidative and biosynthetic metabolism. This dual responsibility requires anaplerotic pathways, such as pyruvate carboxylase (PC), to generate TCA cycle intermediates necessary for biosynthesis without disrupting oxidative metabolism. Liver-specific PC knockout (LPCKO) mice were created to test the role of anaplerotic flux in liver metabolism. LPCKO mice have impaired hepatic anaplerosis, diminution of TCA cycle intermediates, suppressed gluconeogenesis, reduced TCA cycle flux, and a compensatory increase in ketogenesis and renal gluconeogenesis. Loss of PC depleted aspartate and compromised urea cycle function, causing elevated urea cycle intermediates and hyperammonemia. Loss of PC prevented diet-induced hyperglycemia and insulin resistance but depleted NADPH and glutathione, which exacerbated oxidative stress and correlated with elevated liver inflammation. Thus, despite catalyzing the synthesis of intermediates also produced by other anaplerotic pathways, PC is specifically necessary for maintaining oxidation, biosynthesis, and pathways distal to the TCA cycle, such as antioxidant defenses.
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Affiliation(s)
- David A Cappel
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Stanisław Deja
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - João A G Duarte
- Advanced Imaging Research Center, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Blanka Kucejova
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Melissa Iñigo
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Justin A Fletcher
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Xiaorong Fu
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Eric D Berglund
- Center for Hypothalamic Research, The University of Texas Southwestern Medical Center, Dallas, TX, USA; Advanced Imaging Research Center, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Tiemin Liu
- Sate Key Laboratory of Genetic Engineering, School of Life Sciences, Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, Shanghai 200438, China
| | - Joel K Elmquist
- Center for Hypothalamic Research, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Suntrea Hammer
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Prashant Mishra
- Children's Medical Center Research Institute, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jeffrey D Browning
- Department of Clinical Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Shawn C Burgess
- Center for Human Nutrition, The University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, TX, USA.
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15
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Deep Learning/Artificial Intelligence and Blood-Based DNA Epigenomic Prediction of Cerebral Palsy. Int J Mol Sci 2019; 20:ijms20092075. [PMID: 31035542 PMCID: PMC6539236 DOI: 10.3390/ijms20092075] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/29/2019] [Accepted: 04/17/2019] [Indexed: 02/07/2023] Open
Abstract
The etiology of cerebral palsy (CP) is complex and remains inadequately understood. Early detection of CP is an important clinical objective as this improves long term outcomes. We performed genome-wide DNA methylation analysis to identify epigenomic predictors of CP in newborns and to investigate disease pathogenesis. Methylation analysis of newborn blood DNA using an Illumina HumanMethylation450K array was performed in 23 CP cases and 21 unaffected controls. There were 230 significantly differentially-methylated CpG loci in 258 genes. Each locus had at least 2.0-fold change in methylation in CP versus controls with a FDR p-value ≤ 0.05. Methylation level for each CpG locus had an area under the receiver operating curve (AUC) ≥ 0.75 for CP detection. Using Artificial Intelligence (AI) platforms/Machine Learning (ML) analysis, CpG methylation levels in a combination of 230 significantly differentially-methylated CpG loci in 258 genes had a 95% sensitivity and 94.4% specificity for newborn prediction of CP. Using pathway analysis, multiple canonical pathways plausibly linked to neuronal function were over-represented. Altered biological processes and functions included: neuromotor damage, malformation of major brain structures, brain growth, neuroprotection, neuronal development and de-differentiation, and cranial sensory neuron development. In conclusion, blood leucocyte epigenetic changes analyzed using AI/ML techniques appeared to accurately predict CP and provided plausible mechanistic information on CP pathogenesis.
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16
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Alves CAPF, Gonçalves FG, Grieb D, Lucato LT, Goldstein AC, Zuccoli G. Neuroimaging of Mitochondrial Cytopathies. Top Magn Reson Imaging 2018; 27:219-240. [PMID: 30086109 DOI: 10.1097/rmr.0000000000000173] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mitochondrial diseases are a complex and heterogeneous group of genetic disorders that occur as a result of either nuclear DNA or mitochondrial DNA pathogenic variants, leading to a decrease in oxidative phosphorylation and cellular energy (ATP) production. Increasing knowledge about molecular, biochemical, and genetic abnormalities related to mitochondrial dysfunction has expanded the neuroimaging phenotypes of mitochondrial disorders. As a consequence of this growing field, the imaging recognition patterns of mitochondrial cytopathies are continually evolving. In this review, we describe the main neuroimaging characteristics of pediatric mitochondrial diseases, ranging from classical to more recent and challenging features. Due to the increased knowledge about the imaging findings of mitochondrial cytopathies, the pediatric neuroradiologist plays a crucial role in the diagnosis and evaluation of these patients.
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Affiliation(s)
| | | | - Dominik Grieb
- Department of Radiology and Neuroradiology, Sana Kliniken Duisburg, Germany
| | - Leandro Tavares Lucato
- Neuroradiology Section, Hospital das Clínicas- HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Amy C Goldstein
- Division of Human Genetics, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA
| | - Giulio Zuccoli
- Department of Radiology, University of Pittsburgh School of Medicine, Director of Pediatric Neuroradiology, Children Hospital of Pittsburgh, Pittsburgh, PA
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17
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Villoria JG, Pajares S, López RM, Marin JL, Ribes A. Neonatal Screening for Inherited Metabolic Diseases in 2016. Semin Pediatr Neurol 2016; 23:257-272. [PMID: 28284388 DOI: 10.1016/j.spen.2016.11.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The scope of newborn screening (NBS) programs is continuously expanding. NBS programs are secondary prevention interventions widely recognized internationally in the "field of Public Health." These interventions are aimed at early detection of asymptomatic children affected by certain diseases, with the objective to establish a definitive diagnosis and apply the proper treatment to prevent further complications and sequelae and ensure a better quality of life. The most significant event in the history of neonatal screening was the discovery of phenylketonuria in 1934. This disease has been the paradigm of inherited metabolic diseases. The next paradigm was the introduction of tandem mass spectrometry in the NBS programs that make possible the simultaneous measurement of several metabolites and consequently, the detection of several diseases in one blood spot and in an unique analysis. We aim to review the current situation of neonatal screening in 2016 worldwide and show scientific evidence of the benefits for some diseases. We will also discuss future challenges. It should be taken into account that any consideration to expand an NBS panel should involve a rigorous process of decision-making that balances benefits against the risks of harm.
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Affiliation(s)
- Judit Garcia Villoria
- From the Seccción de Errores Congénitos del Metabolismo-IBC, Servicio de Bioquímica y Genética Molecular, Hospital ClinicHospital Clínic, CIBERER, IDIBAPS, Barcelona, Spain
| | - Sonia Pajares
- From the Seccción de Errores Congénitos del Metabolismo-IBC, Servicio de Bioquímica y Genética Molecular, Hospital ClinicHospital Clínic, CIBERER, IDIBAPS, Barcelona, Spain
| | - Rosa María López
- From the Seccción de Errores Congénitos del Metabolismo-IBC, Servicio de Bioquímica y Genética Molecular, Hospital ClinicHospital Clínic, CIBERER, IDIBAPS, Barcelona, Spain
| | - José Luis Marin
- From the Seccción de Errores Congénitos del Metabolismo-IBC, Servicio de Bioquímica y Genética Molecular, Hospital ClinicHospital Clínic, CIBERER, IDIBAPS, Barcelona, Spain
| | - Antonia Ribes
- From the Seccción de Errores Congénitos del Metabolismo-IBC, Servicio de Bioquímica y Genética Molecular, Hospital ClinicHospital Clínic, CIBERER, IDIBAPS, Barcelona, Spain.
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