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Bar O, Ebenau L, Weiner K, Mintz M, Boles RG. Whole exome/genome sequencing in cyclic vomiting syndrome reveals multiple candidate genes, suggesting a model of elevated intracellular cations and mitochondrial dysfunction. Front Neurol 2023; 14:1151835. [PMID: 37234784 PMCID: PMC10208274 DOI: 10.3389/fneur.2023.1151835] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 04/03/2023] [Indexed: 05/28/2023] Open
Abstract
Objective To utilize whole exome or genome sequencing and the scientific literature for identifying candidate genes for cyclic vomiting syndrome (CVS), an idiopathic migraine variant with paroxysmal nausea and vomiting. Methods A retrospective chart review of 80 unrelated participants, ascertained by a quaternary care CVS specialist, was conducted. Genes associated with paroxysmal symptoms were identified querying the literature for genes associated with dominant cases of intermittent vomiting or both discomfort and disability; among which the raw genetic sequence was reviewed. "Qualifying" variants were defined as coding, rare, and conserved. Additionally, "Key Qualifying" variants were Pathogenic/Likely Pathogenic, or "Clinical" based upon the presence of a corresponding diagnosis. Candidate association to CVS was based on a point system. Results Thirty-five paroxysmal genes were identified per the literature review. Among these, 12 genes were scored as "Highly likely" (SCN4A, CACNA1A, CACNA1S, RYR2, TRAP1, MEFV) or "Likely" (SCN9A, TNFRSF1A, POLG, SCN10A, POGZ, TRPA1) CVS related. Nine additional genes (OTC, ATP1A3, ATP1A2, GFAP, SLC2A1, TUBB3, PPM1D, CHAMP1, HMBS) had sufficient evidence in the literature but not from our study participants. Candidate status for mitochondrial DNA was confirmed by the literature and our study data. Among the above-listed 22 CVS candidate genes, a Key Qualifying variant was identified in 31/80 (34%), and any Qualifying variant was present in 61/80 (76%) of participants. These findings were highly statistically significant (p < 0.0001, p = 0.004, respectively) compared to an alternative hypothesis/control group regarding brain neurotransmitter receptor genes. Additional, post-analyses, less-intensive review of all genes (exome) outside our paroxysmal genes identified 13 additional genes as "Possibly" CVS related. Conclusion All 22 CVS candidate genes are associated with either cation transport or energy metabolism (14 directly, 8 indirectly). Our findings suggest a cellular model in which aberrant ion gradients lead to mitochondrial dysfunction, or vice versa, in a pathogenic vicious cycle of cellular hyperexcitability. Among the non-paroxysmal genes identified, 5 are known causes of peripheral neuropathy. Our model is consistent with multiple current hypotheses of CVS.
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Affiliation(s)
- Omri Bar
- NeurAbilities Healthcare, Voorhees, NJ, United States
| | - Laurie Ebenau
- NeurAbilities Healthcare, Voorhees, NJ, United States
| | - Kellee Weiner
- NeurAbilities Healthcare, Voorhees, NJ, United States
| | - Mark Mintz
- NeurAbilities Healthcare, Voorhees, NJ, United States
| | - Richard G. Boles
- NeurAbilities Healthcare, Voorhees, NJ, United States
- NeuroNeeds, Old Lyme, CT, United States
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Talukder NT, Clorfeine AH, Black MK, Moody SB. Atypical idiopathic intracranial hypertension presenting as cyclic vomiting syndrome: a case report. J Med Case Rep 2021; 15:440. [PMID: 34461990 PMCID: PMC8405252 DOI: 10.1186/s13256-021-03068-x] [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: 03/31/2021] [Accepted: 08/14/2021] [Indexed: 11/21/2022] Open
Abstract
Background Idiopathic intracranial hypertension is a disorder of increased intracranial pressure in the absence of cerebrospinal outflow obstruction, mass lesion, or other underlying cause. It is a rare phenomenon in prepubertal children and is most typically found in women of childbearing age. The classic presentation consists of headaches, nausea, vomiting, and visual changes; however, children present more atypically. We report a case of idiopathic intracranial hypertension in an otherwise healthy, 4-year-old child with atypical symptoms resembling those of cyclic vomiting syndrome. Case presentation A 4-year-old Caucasian, otherwise healthy, male child presented to our emergency department with episodic intermittent early-morning vomiting occurring once every 1–3 weeks without interepisodic symptoms, starting 10 months prior. With outpatient metabolic, autoimmune, endocrine, allergy, and gastroenterology work-up all unremarkable, he was initially diagnosed with cyclic vomiting syndrome. Discovery of mild optic nerve sheath distension on magnetic resonance imaging of the brain 10 months after symptom onset led to inpatient admission and a lumbar puncture notable for an opening pressure of 47 mmHg, with normal cell count and protein levels. He had no changes in visual acuity or optic disc edema on dilated fundoscopic examination. The patient was started on acetazolamide, with resolution of episodic emesis at his last follow-up visit 12 weeks after discharge. Conclusions Idiopathic intracranial hypertension presents atypically in prepubescent children, with about one-fourth presenting asymptomatically, and only 13–52% presenting with “classic” symptoms. With a prevalence of only 0.6–0.7 per 100,000, much remains unknown regarding the underlying pathophysiology in this demographic. Cyclic vomiting syndrome, however, has a much higher prevalence in this age group, with a prevalence of 0.4–1.9 per 100. It is thought to be an idiopathic, periodic disorder of childhood, often linked to neurological conditions such as abdominal migraines, epilepsy, mitochondrial disorders, and structural lesions such as chiari malformation and posterior fossa tumors. While cyclic vomiting syndrome is thought to have a benign course, untreated idiopathic intracranial hypertension can have long-term detrimental effects, such as visual loss or even blindness. We present a case of idiopathic intracranial hypertension presenting with symptoms resembling cyclic vomiting syndrome in a 4-year-old child, diagnosed 10 months after initial onset of symptoms. We aim to demonstrate the need for a high level of clinical suspicion and the need for further investigation into underlying pathophysiology in this vulnerable population.
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Affiliation(s)
- Nafee T Talukder
- Department of Neurology, Children's Memorial Hermann Hospital, 6410 Fannin St., Ste 1014, Houston, TX, 77030, USA. .,University of Texas Health Science Center, Houston, TX, USA.
| | - Amanda H Clorfeine
- Department of Neurology, Children's Memorial Hermann Hospital, 6410 Fannin St., Ste 1014, Houston, TX, 77030, USA.,University of Texas Health Science Center, Houston, TX, USA
| | - Moira K Black
- Department of Neurology, Children's Memorial Hermann Hospital, 6410 Fannin St., Ste 1014, Houston, TX, 77030, USA.,University of Texas Health Science Center, Houston, TX, USA
| | - Shade B Moody
- Department of Neurology, Children's Memorial Hermann Hospital, 6410 Fannin St., Ste 1014, Houston, TX, 77030, USA.,University of Texas Health Science Center, Houston, TX, USA
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Kovacic K, Li BUK. Cyclic vomiting syndrome: A narrative review and guide to management. Headache 2021; 61:231-243. [PMID: 33619730 DOI: 10.1111/head.14073] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/03/2021] [Accepted: 01/06/2021] [Indexed: 12/18/2022]
Abstract
OBJECTIVES/BACKGROUND Cyclic vomiting syndrome (CVS) is a disabling disorder of gut-brain interaction manifested by stereotypical and severe episodes of nausea and vomiting. Prevalence data indicate that CVS affects 1-2% of children and there has been a recent dramatic rise in diagnosed adults. METHODS This narrative review summarizes relevant literature pertaining to pediatric and adult CVS and provides a guide to management based on extensive clinical experience. RESULTS More timely diagnosis is facilitated by an expert consensus diagnostic approach and limited testing. Some diagnostic tests of exclusion remain essential. These include an upper gastrointestinal (GI) contrast study to exclude intestinal malrotation and basic laboratory screening. An abdominal ultrasound is recommended to exclude renal hydronephrosis in children and biliary disease in adults. Exclusion of metabolic/genetic conditions is warranted in those with specific warning signs, presentation in infants/toddler age, and in those with refractory disease. In the absence of chronic GI symptoms, referral to a GI specialist for upper endoscopy is generally not necessary in children but recommended in adults. A large subset termed migraine-equivalent CVS display strong clinical and genetic features of migraine. A unifying pathophysiologic core concept involves neuronal hyperexcitability and aberrant central modulation of autonomic signals. This is coupled with multiple susceptibility factors including mitochondrial dysfunction/cellular energy deficits, a hyper-responsive hypothalamic-pituitary-adrenal axis and many comorbidities that increase vulnerability to triggering events. CVS episodes are frequently triggered by stressors and intercurrent illnesses. Lifestyle and non-pharmacological interventions thus play a pivotal role in successful management. Pharmacological therapies are categorized into abortive, supportive/rescue, and prophylactic treatments. The majority respond particularly well to migraine-focused treatment strategies. CONCLUSION Despite improved characterization and understanding, CVS remains classified as a functional disorder of brain-gut interaction that is often disjointly managed by generalists and subspecialists. Early recognition, evaluation, and management will facilitate care and improve outcomes. Further research into its natural history with common progression to migraine headaches, neuroendocrine mechanisms, and the pathophysiologic relation to migraine diathesis is much needed.
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Affiliation(s)
- Katja Kovacic
- Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, Medical College of Wisconsin, Milwaukee, WI, USA
| | - B U K Li
- Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, Medical College of Wisconsin, Milwaukee, WI, USA
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Ermilov VV, Barkanov VB, Barkanova ON, Dorofeev NA, Filatov VE. [Clinical and anatomical features of SARS-COV-2 with acute hemorrhagic necrotizing encephalopathy]. Arkh Patol 2021; 83:35-43. [PMID: 33512126 DOI: 10.17116/patol20218301135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Autopsy material and medical history were studied and analyzed in a 20-year-old male patient who had died from COVID-19 infection with the development of acute SARS-CoV-2-associated hemorrhagic necrotizing encephalopathy in adults with obvious endothelial dysfunction confirmed by virological examination of the autopsy material. In this case, the brain structures displayed the main found histopathologic signs: widespread vasculitis (endotheliitis) with varying degrees of segmental and total endothelial destruction; thrombosis mainly of the vessels of the microcirculatory bed; parenchymal hemorrhagic necrosis and inflammation (encephalitis); severe necrobiotic damage to neurons. Cerebrovascular immune damages and hypercoagulable states, which were observed in some acute viral neuroinfections, are the basis for the neurological complications of COVID-19. In this case of bicausal diagnosis (the presence of a comorbidity), the primary disease contributed to the acute progression of the background disease (secondary infiltrative tuberculosis with the development of specific pleuritis and pneumothorax with the addition of acute bilateral focal confluent bronchopneumonia with a history of undifferentiated immunodeficiency syndrome. Emphasis is laid on the possibility and importance of involving the brain structures in the process in COVID-19 for the timely diagnosis of emerging neurological disorders. A brief literature review is given.
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Affiliation(s)
- V V Ermilov
- Volgograd State Medical University, Volgograd, Russia
| | - V B Barkanov
- Volgograd State Medical University, Volgograd, Russia
| | - O N Barkanova
- Volgograd State Medical University, Volgograd, Russia
| | - N A Dorofeev
- Volgograd State Medical University, Volgograd, Russia
| | - V E Filatov
- Volgograd Regional Bureau of Forensic Medicine, Volgograd, Russia
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Raucci U, Borrelli O, Di Nardo G, Tambucci R, Pavone P, Salvatore S, Baldassarre ME, Cordelli DM, Falsaperla R, Felici E, Ferilli MAN, Grosso S, Mallardo S, Martinelli D, Quitadamo P, Pensabene L, Romano C, Savasta S, Spalice A, Strisciuglio C, Suppiej A, Valeriani M, Zenzeri L, Verrotti A, Staiano A, Villa MP, Ruggieri M, Striano P, Parisi P. Cyclic Vomiting Syndrome in Children. Front Neurol 2020; 11:583425. [PMID: 33224097 PMCID: PMC7667239 DOI: 10.3389/fneur.2020.583425] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/14/2020] [Indexed: 12/13/2022] Open
Abstract
Cyclic Vomiting Syndrome (CVS) is an underdiagnosed episodic syndrome characterized by frequent hospitalizations, multiple comorbidities, and poor quality of life. It is often misdiagnosed due to the unappreciated pattern of recurrence and lack of confirmatory testing. CVS mainly occurs in pre-school or early school-age, but infants and elderly onset have been also described. The etiopathogenesis is largely unknown, but it is likely to be multifactorial. Recent evidence suggests that aberrant brain-gut pathways, mitochondrial enzymopathies, gastrointestinal motility disorders, calcium channel abnormalities, and hyperactivity of the hypothalamic-pituitary-adrenal axis in response to a triggering environmental stimulus are involved. CVS is characterized by acute, stereotyped and recurrent episodes of intense nausea and incoercible vomiting with predictable periodicity and return to baseline health between episodes. A distinction with other differential diagnoses is a challenge for clinicians. Although extensive and invasive investigations should be avoided, baseline testing toward identifying organic causes is recommended in all children with CVS. The management of CVS requires an individually tailored therapy. Management of acute phase is mainly based on supportive and symptomatic care. Early intervention with abortive agents during the brief prodromal phase can be used to attempt to terminate the attack. During the interictal period, non-pharmacologic measures as lifestyle changes and the use of reassurance and anticipatory guidance seem to be effective as a preventive treatment. The indication for prophylactic pharmacotherapy depends on attack intensity and severity, the impairment of the QoL and if attack treatments are ineffective or cause side effects. When children remain refractory to acute or prophylactic treatment, or the episode differs from previous ones, the clinician should consider the possibility of an underlying disease and further mono- or combination therapy and psychotherapy can be guided by accompanying comorbidities and specific sub-phenotype. This review was developed by a joint task force of the Italian Society of Pediatric Gastroenterology Hepatology and Nutrition (SIGENP) and Italian Society of Pediatric Neurology (SINP) to identify relevant current issues and to propose future research directions on pediatric CVS.
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Affiliation(s)
- Umberto Raucci
- Pediatric Emergency Department, Bambino Gesù Children's Hospital, Institute for Research, Hospitalization and Health Care (IRCCS), Rome, Italy
| | - Osvaldo Borrelli
- Division of Neurogastroenterology and Motility, Department of Pediatric Gastroenterology, University College London (UCL) Institute of Child Health and Great Ormond Street Hospital, London, United Kingdom
| | - Giovanni Di Nardo
- Chair of Pediatrics, Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Faculty of Medicine & Psychology, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Renato Tambucci
- Digestive Endoscopy and Surgery Unit, Bambino Gesù Children's Hospital, Institute for Research, Hospitalization and Health Care (IRCCS), Rome, Italy
| | - Piero Pavone
- Section of Pediatrics and Child Neuropsychiatry, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Silvia Salvatore
- Pediatric Department, Ospedale “F. Del Ponte,” University of Insubria, Varese, Italy
| | | | | | - Raffaele Falsaperla
- Neonatal Intensive Care and Pediatric Units, S. Marco Hospital, Vittorio Emanuele Hospital, Catania, Italy
| | - Enrico Felici
- Unit of Pediatrics, The Children Hospital, Azienda Ospedaliera SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - Michela Ada Noris Ferilli
- Division of Neurology, Bambino Gesù Children's Hospital, Institute for Research, Hospitalization and Health Care (IRCCS), Rome, Italy
| | - Salvatore Grosso
- Clinical Pediatrics, Department of Molecular Medicine and Development, University of Siena, Siena, Italy
| | - Saverio Mallardo
- Pediatric Department, Santa Maria Goretti Hospital, Sapienza University of Rome, Latina, Italy
| | - Diego Martinelli
- Division of Metabolism, Department of Pediatric Specialties, Bambino Gesù Children's Hospital, Institute for Research, Hospitalization and Health Care (IRCCS), Rome, Italy
| | - Paolo Quitadamo
- Department of Pediatrics, A.O.R.N. Santobono-Pausilipon, Naples, Italy
| | - Licia Pensabene
- Pediatric Unit, Department of Medical and Surgical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
| | - Claudio Romano
- Pediatric Gastroenterology Unit, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, University of Messina, Messina, Italy
| | | | - Alberto Spalice
- Child Neurology Division, Department of Pediatrics, “Sapienza,” University of Rome, Rome, Italy
| | - Caterina Strisciuglio
- Department of Woman, Child, General and Specialistic Surgery, University of Campania “Luigi Vanvitelli,” Naples, Italy
| | - Agnese Suppiej
- Pediatric Section, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Massimiliano Valeriani
- Division of Neurology, Bambino Gesù Children's Hospital, Institute for Research, Hospitalization and Health Care (IRCCS), Rome, Italy
| | - Letizia Zenzeri
- Emergency Pediatric Department, Santobono-Pausilipon Children's Hospital, Naples, Italy
| | - Alberto Verrotti
- Department of Pediatrics, University of L'Aquila, L'Aquila, Italy
| | - Annamaria Staiano
- Section of Pediatrics, Department of Translational Medical Science, “Federico II” University of Naples, Naples, Italy
| | - Maria Pia Villa
- Chair of Pediatrics, Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Faculty of Medicine & Psychology, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
| | - Martino Ruggieri
- Unit of Rare Diseases of the Nervous System in Childhood, Section of Pediatrics and Child Neuropsychiatry, Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Pasquale Striano
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, Genova, Italy
- Institute for Research, Hospitalization and Health Care (IRCCS) “G. Gaslini” Institute, Genova, Italy
| | - Pasquale Parisi
- Chair of Pediatrics, Department of Neuroscience, Mental Health and Sense Organs (NESMOS), Faculty of Medicine & Psychology, Sant'Andrea Hospital, Sapienza University of Rome, Rome, Italy
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Garg RK, Paliwal VK, Gupta A. Encephalopathy in patients with COVID-19: A review. J Med Virol 2020; 93:206-222. [PMID: 32558956 DOI: 10.1002/jmv.26207] [Citation(s) in RCA: 124] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 06/15/2020] [Indexed: 12/11/2022]
Abstract
Encephalopathy and encephalitis are major and devastating severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus-associated central nervous system complications. Hypoxic/metabolic changes produced by intense inflammatory response against the virus triggers cytokine storm and subsequently acute respiratory distress syndrome and multiple organ failure. Hypoxic/metabolic changes result in encephalopathy. The presence of comorbidities predisposes to hypoxic/metabolic changes responsible for encephalopathy. Altered consciousness, ranging from mild confusion, delirium, to deep coma, is hallmark clinical features. Cortical and subcortical T2/FLAIR signal changes are common neuroimaging abnormalities. In a few isolated case reports of SARS-CoV-2 encephalitis, the virus has been demonstrated in cerebrospinal fluid. The presence of anosmia and ageusia can help in differentiation from other encephalopathies. We analyzed published reports on coronavirus disease 2019-associated encephalopathy. Encephalopathy is common in older patients, the majority are more than 50 years of age. The patients having encephalopathy/encephalitis are either severely or critically ill. Many patients were already on mechanical ventilation. Lung abnormalities are noted in almost all of the patients, presenting with encephalopathy. Encephalopathy is always preceded by commoner clinical features, like, fever, cough, dyspnoea, and headache. In majority, patients are already in the intensive care unit, when encephalopathy develops.
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Affiliation(s)
- Ravindra Kumar Garg
- Department of Neurology, King George Medical University, Lucknow, Uttar Pradesh, India
| | | | - Ankit Gupta
- Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
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