Publications by authors named "Mauricio de Castro"

The sudden death of a previously healthy infant is a devastating event for a family-the death of 2 even more unimaginable. Prior to the debunking of Meadow's law, a legal concept attributing multiple unexplained infant deaths to Munchausen by proxy, these events could lead to the wrongful prosecution of those who had lost their children to "sudden unexpected infant death (SUID)." Today, these cases, wherein multiple infants within one family pass inexplicably, raise suspicion for a possible genetic cause and point toward a need for postmortem genetic testing.

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Sulfatases catalyze essential cellular reactions, including degradation of glycosaminoglycans (GAGs). All sulfatases are post-translationally activated by the formylglycine generating enzyme (FGE) which is deficient in multiple sulfatase deficiency (MSD), a neurodegenerative lysosomal storage disease. Historically, patients were presumed to be deficient of all sulfatase activities; however, a more nuanced relationship is emerging.

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Article Synopsis
  • Response to medications varies among individuals, and adverse drug reactions can be serious; pharmacogenetic (PGx) testing helps predict these responses and risks based on genetics.
  • A study conducted at a military clinic in 2022 showed that a significant percentage of patients had abnormal PGx findings related to medications they were taking, indicating a potential need for personalized medication management.
  • The findings suggest that a large number of military health system patients could benefit from PGx testing to optimize their medication regimens based on established clinical guidelines.
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Precision medicine is an approach to healthcare that is modifying clinical management by leveraging technological advances in genomics that assess a patient's genetic information to identify unique predispositions. While the civilian sector is integrating genomics widely to personalize diagnosis and treatment, the military medical environment has reacted more slowly. The operational requirements of military service encourage a tailored approach for focusing military precision medicine on occupation-specific conditions.

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Pressed by the accumulating knowledge in genomics and the proven success of the translation of cancer genomics to clinical practice in oncology, the Obama administration unveiled a $215 million commitment for the Precision Medicine Initiative (PMI) in 2016, a pioneering research effort to improve health and treat disease using a new model of patient-powered research. The objectives of the initiative include more effective treatments for cancer and other diseases, creation of a voluntary national research cohort, adherence to privacy protections for maintaining data sharing and use, modernization of the regulatory framework, and forging public-private partnerships to facilitate these objectives. Specifically, the DoD Military Health System joined other agencies to execute a comprehensive effort for PMI.

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Purpose: The use of genomic sequencing (GS) in military settings poses unique considerations, including the potential for GS to impact service members' careers. The MilSeq Project investigated the use of GS in clinical care of active duty Airmen in the United States Air Force (USAF).

Methods: We assessed perceived risks, benefits, and attitudes toward use of GS in the USAF among patient participants (n = 93) and health-care provider participants (HCPs) (n = 12) prior to receiving or disclosing GS results.

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Article Synopsis
  • Multiple sulfatase deficiency (MSD) is a rare neurodegenerative disorder linked to mutations in the SUMF1 gene, impacting sulfatase activation and leading to various sulfatase deficiencies.
  • The study analyzed 35 cases, focusing on the relationship between genetic variants and clinical outcomes, revealing that earlier symptom onset and severe genetic variants were associated with poorer neurological outcomes.
  • Findings highlighted differences between severe and attenuated cases, providing insights that could aid in prognosis and future research on MSD.
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Purpose: With few trained genetics professionals, the Military Health System is ill-equipped to manage the rapid expansion of genomic medicine. The MilSeq Project introduces an alternative service delivery model (ASDM) in which primary health-care providers (HCPs) provide post-test counseling (PTC) to healthy Airmen who have undergone exome sequencing. We describe HCP performance after a prerequisite educational intervention (EI).

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Background: Genotyping has expanded the number red blood cell (RBC) and platelet (PLT) antigens that can readily be typed, but often represents an additional testing cost. The analysis of existing genomic data offers a cost-effective approach. We recently developed automated software (bloodTyper) for determination of RBC and PLT antigens from whole genome sequencing.

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Background: Genomic sequencing has become a widely used tool in clinical and research settings in both civilian and military healthcare systems.

Methods: In this paper, we consider potential military-specific implications of returning genomic sequencing secondary findings to ensure the proper protections, policies, and processes are in place for the use of this information.

Results: We specifically use two examples to highlight potential military implications of the return of secondary findings.

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Unfortunately the name of one of the authors was spelled incorrectly in the published original article. The correct name is Alejandro Santos-Lozano. The original article got updated.

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McArdle disease is an autosomal recessive condition caused by deficiency of the PYGM gene-encoded muscle isoform of glycogen phosphorylase. Some cases of "manifesting" heterozygotes or carriers (i.e.

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Purpose: The mandibular canal must be considered in dental procedures to avoid injuries of the alveolar inferior nerve. The occurrence of anatomical variations of the mandibular canal increases the risk of neurovascular injuries. The purpose of this study was to identify and describe the prevalence of mandibular canal branching (MCB) using cone beam computer tomography (CBCT).

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Multiple sulfatase deficiency (MSD) is an ultra-rare neurodegenerative disorder that results in defective sulfatase post-translational modification. Sulfatases in the body are activated by a unique protein, formylglycine-generating enzyme (FGE) that is encoded by SUMF1. When FGE is absent or insufficient, all 17 known human sulfatases are affected, including the enzymes associated with metachromatic leukodystrophy (MLD), several mucopolysaccharidoses (MPS II, IIIA, IIID, IVA, VI), chondrodysplasia punctata, and X-linked ichthyosis.

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We describe the impact genomics has on the health and readiness of the military service member, highlight several examples of the current and future plans for genomic medicine within the military, discuss challenges to implementation and provide recommendations to address some of those challenges.

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This is a foreword on the life and work of one of the greatest minds of the 20th century, the father of modern genetics, Johann Gregor Mendel.

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The announcement of the Precision Medicine Initiative was an important step towards establishing the use of genomic information as part of the wider practice of medicine. The US military has been exploring the role that genomic information will have in health care for service members (SMs) and its integration into the continuum of military medicine. An important part of the process is establishing robust protections to protect SMs from genetic discrimination in the era of exome/genome sequencing.

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Purpose: McArdle disease is one of the most common glycogen storage disorders. Although the exact prevalence is not known, it has been estimated to be 1 in 100,000 patients in the United States. More than 100 mutations in PYGM have been associated with this disorder.

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In multiple carboxylase deficiency (MCD), the biotin-dependent carboxylases have decreased activity due to either biotinidase deficiency or holocarboxylase synthetase (HS) deficiency. We report the case of two siblings from Ghana, the first of which presented shortly after birth with profound lactic acidosis and a urine organic acid profile consistent with MCD. In the first sibling, treatment with pulverized biotin tablets (20 mg) was begun immediately, but the patient died at 10 days of age from cardiac arrest secondary to refractory metabolic acidosis.

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