Publications by authors named "Rives L"

Article Synopsis
  • Autosomal dominant congenital disorder of glycosylation (CDG) type Iw is caused by a mutation in a specific gene and differs from most CDGs, which are typically autosomal recessive.
  • A 17-year-old male presented with a range of symptoms including macrocephaly, epilepsy, and developmental delays, but initial genetic tests and biochemical analyses did not indicate a clear diagnosis.
  • Genome sequencing revealed a novel mutation that disrupts a glycosylation site, and the patient was ultimately diagnosed with CDG type Iw based on abnormal transferrin profiling, illustrating the variability in genetic disorders and the need for comprehensive testing.
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Purpose: Variants in result in a rare neurodevelopmental disorder characterized by a variable clinical presentation of symptoms including developmental delay, epilepsy, motor dysfunction, and autism spectrum disorder. haploinsufficiency has been confirmed as the predominant pathway of related neurodevelopmental disorders (NDDs), however, the molecular mechanism underlying the variable clinical presentation remains unclear.

Methods: Here, through work of the Undiagnosed Diseases Network, we identify an undiagnosed individual with an inherited p.

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Article Synopsis
  • The Undiagnosed Disease Network (UDN) is a collaborative effort funded by the NIH, focused on diagnosing rare diseases through 12 clinical sites, including Vanderbilt University Medical Center (VUMC).
  • At VUMC, experts in fields like bioinformatics, structural biology, and genetics worked together to identify a rare genetic variant in a 5-year-old girl with various neurological issues.
  • The team diagnosed her with Primary Aldosteronism, Seizures, and Neurologic abnormalities (PASNA), showcasing the value of a multidisciplinary approach in addressing complex, rare diseases.
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  • Recent research identified a new mutation linked to a rare axonal Charcot-Marie-Tooth disease in both Caucasian and black African families, expanding the understanding of its genetic basis.
  • The study involved eight patients and their relatives, with a diagnosis average age of 33.9 years; common symptoms included walking difficulties, muscle weakness, and deformities in hands and feet.
  • Whole exome sequencing uncovered a novel variant in the gene responsible, revealing notable decreases in protein levels and structural changes, emphasizing the importance of including diverse populations in genetic research.
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Article Synopsis
  • - A 26-year-old woman diagnosed with Diamond-Blackfan anemia (DBA) was referred to the Undiagnosed Diseases Network due to the lack of a specific genetic cause found for her condition.
  • - Her case was uniquely identified as being influenced by digenic interactions, specifically involving variations in two different genes (RPS19 and RPL27), rather than the typical single-gene mutations usually associated with DBA.
  • - The findings were supported by advanced techniques including machine learning models, co-segregation analysis, and RNA sequencing, highlighting that atypical presentations of DBA may arise from multiple gene interactions and not just single-gene effects.
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Article Synopsis
  • A 72-year-old man with 45 years of progressive weakness in his legs was initially misdiagnosed with Charcot-Marie-Tooth disease type 2 (CMT2) but didn't have a clear genetic cause identified.
  • After exome sequencing (ES) failed to pinpoint a problem, further investigation revealed biallelic variants in the sorbitol dehydrogenase (SORD) gene, leading to a formal diagnosis of Sorbitol Dehydrogenase Deficiency with Peripheral Neuropathy (SORDD).
  • The patient's diagnosis allowed him to participate in a clinical trial for a potential new treatment, highlighting the importance of advanced genetic testing for accurate diagnosis in similar cases.
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The Accreditation Council for Graduate Medical Education (ACGME), which regulates residency and fellowship training in the United States, recently revised the minimum standards for all training programs. These standards are codified and published as the Common Program Requirements. Recent specific revisions, particularly removing the requirement ensuring protected time for core faculty, are poised to have a substantial impact on emergency medicine training programs.

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While exome sequencing (ES) is commonly the final diagnostic step in clinical genetics, it may miss diagnoses. To clarify the limitations of ES, we investigated the diagnostic yield of genetic tests beyond ES in our Undiagnosed Diseases Network (UDN) participants. We reviewed the yield of additional genetic testing including genome sequencing (GS), copy number variant (CNV), noncoding variant (NCV), repeat expansion (RE), or methylation testing in UDN cases with nondiagnostic ES results.

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Background: Rare variants (RV) in immunoglobulin mu-binding protein 2 (IGHMBP2) [OMIM 600502] can cause an autosomal recessive type of Charcot-Marie-Tooth (CMT) disease [OMIM 616155], an inherited peripheral neuropathy. Over 40 different genes are associated with CMT, with different possible inheritance patterns.

Methods And Results: An 11-year-old female with motor delays was found to have distal atrophy, weakness, and areflexia without bulbar or sensory findings.

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Introduction: Despite the ever-increasing numbers of mental health patients presenting to United States emergency departments, there are large gaps in knowledge about acute care of the behavioral health patient. To address this important problem, the Coalition on Psychiatric Emergencies convened a research consensus conference in December 2016 consisting of clinical researchers, clinicians from emergency medicine, psychiatry and psychology, and representatives from governmental agencies and patient advocacy groups.

Methods: Participants used a standardized methodology to select and rank research questions in the order of importance to both researchers and patients.

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Rationale: Up to 20% of cases of idiopathic interstitial pneumonia cluster in families, comprising the syndrome of familial interstitial pneumonia (FIP); however, the genetic basis of FIP remains uncertain in most families.

Objectives: To determine if new disease-causing rare genetic variants could be identified using whole-exome sequencing of affected members from FIP families, providing additional insights into disease pathogenesis.

Methods: Affected subjects from 25 kindreds were selected from an ongoing FIP registry for whole-exome sequencing from genomic DNA.

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Secretory breast carcinoma is a rare tumor originally described in children and adolescent women with a characteristic morphology and a controversial choice of treatment. We report an additional case of a 4-year-old girl with a breast tumor diagnosed as a secretory carcinoma without involvement of the axillary lymph nodes. The therapy consisted of simple mastectomy and low axillary dissection.

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Appropriate interventional treatment for coronary artery disease is an important component in controlling health care expenditures. We conducted a retrospective study to compare the patient charges associated with percutaneous transluminal coronary angioplasty (PTCA) or coronary artery bypass grafting (CABG). All patients underwent treatment for left anterior descending coronary artery stenosis over a 3 year 9 month time period from March 1987 to December 1990 and were followed for 7-58 months (median 43 months) after treatment.

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A 46-year-old male presented to the emergency room seven hours after consuming a large container of sterno. He could not see and complained of abdominal and back pain. He was tachypneic, tachycardic, hypertensive and hypothermic.

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Methanol intoxication can be a challenge, in part because it is relatively uncommon but also because of the pharmacokinetics involved. A patient may not experience symptoms and thus may not present for treatment for several hours, or even a day or two, after exposure to the toxic substance. Yet, the interval between ingestion and treatment is one of the most important factors in determining patient outcome.

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The present study was designed to reproduce the mild hypertension seen in dietary obese weight-cycled rats [P. Ernsberger and D. O.

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A series of mono-, di-, and trimethoxystyryl derivatives of heterocyclic nitrogen compounds were prepared to test the N-O-O triangulation hypothesis of Zee-Cheng and Cheng. Of 29 free bases submitted for KB cell culture test, only 2-(3,4-methylenedioxystyryl)benzoxazole and 4-(2,5-dimethoxystyryl)cinnoline were active (ED50 of 4 microgram/ml or less). Methiodide salts were more potent: 8 of 14 were active.

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Analogues of cis-dichlorodiammineplatinum(II) were prepared in which substituted pyridines (A), 1-(4-aminobenzylidene)indene (B), or DL-3,5,3'5'-tetraoxo-1,2-dipiperazinopropane (ICRF-159) was used in place of ammonia, and in some cases platinum(IV) or palladium(II) was used in place of the platinum(II). Both platinum complexes with ICRF-159 were active against leukemia 1210, but none of the others produced significant life extension following a single ip dose of 400 mg/kg. Attempts to prepare complexes of ICRF-159 with Zn(II), Mn(II), and Cr(III) were unsuccessful, but there were indications of complex formation with CuCl2 and with NiCl2.

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