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1.
Front Public Health ; 10: 927494, 2022.
Article in English | MEDLINE | ID: mdl-36388318

ABSTRACT

Background: The coronavirus disease 2019 (COVID-19) pandemic has added a massive economic burden on health care systems worldwide. Saudi Arabia is one of the numerous countries that have been economically affected by this pandemic. The objective of this study was to provide real-world data on the health economic burden of COVID-19 on the Saudi health sector and assess the direct medical costs associated with the management of COVID-19. Methods: A retrospective cohort study was conducted based on data collected from patients hospitalized with COVID-19 across 10 institutions in eight different regions in Saudi Arabia. The study calculated the direct medical costs of all cases during the study period by using SAS statistical analysis software. These costs included costs directly related to medical services, such as the health care treatment, hospital stays, laboratory investigations, treatment, outcome, and other related care. Results: A total of 5,286 adult patients admitted with COVID-19 during the study period were included in the study. The average age of the patients was 54 years, and the majority were male (79%). Among the COVID-19 patients hospitalized in a general ward, the median hospital length of stay was 5.5 days (mean: 9.18 days), while the ICU stay was 4.2 days (mean: 7.94 days). The total medical costs for general ward and ICU patients were US$ 38,895 and US$ 24,207,296.9, respectively. The total laboratory investigations ranked as the highest-cost services US$ 588,975 followed by treatment US$ 3,886,509.8. Overall, the total cost of all medical services for patients hospitalized with COVID-19 was US$ 51,572,393.4. Conclusion: This national study found that COVID-19 was not only a serious concern for patients but also a serious economic burden on the health care system in Saudi Arabia.


Subject(s)
COVID-19 , Financial Stress , Adult , Humans , Male , Female , Middle Aged , Saudi Arabia/epidemiology , COVID-19/epidemiology , Retrospective Studies , Hospitalization
2.
Preprint in English | medRxiv | ID: ppmedrxiv-22273439

ABSTRACT

BackgroundThe coronavirus disease 2019 (COVID-19) pandemic has placed a massive economic burden on health care systems worldwide. Saudi Arabia is one of the numerous countries that have been economically affected by this pandemic. The objective of this study was to provide real-world data on the health economic burden of COVID-19 on the Saudi health sector and assess the direct medical costs associated with the management of COVID-19. MethodsA retrospective cohort study was conducted based on data collected from patients hospitalized with COVID-19 across ten institutions in eight different regions in Saudi Arabia. The study calculated the estimated costs of all cases during the study period by using direct medical costs. These costs included costs directly related to medical services, such as the health care treatment, hospital stays, laboratory investigations, treatment, outcome, and other related care. ResultsA total of 5,286 adult patients admitted with COVID-19 during the study period were included in the study. The average age of the patients was 54 years, and the majority were male. Among the COVID-19 patients hospitalized in a general ward, the median hospital length of stay was 5.5 days (mean: 9.18 days), while the ICU stay was 4.26 days (mean: 7.94 days). The total medical costs for general ward and ICU patients were 14,585,640 SAR and 90,776,250 SAR, respectively. The total laboratory investigations ranked as the highest-cost services (22,086,296 SAR), followed by treatment (14,574,233.1 SAR). Overall, the total cost of all medical services for patients hospitalized with COVID-19 was 193,394,103.1 SAR. ConclusionThis national study found that COVID-19 was not only a serious concern for patients but also a serious economic burden on the health care system in Saudi Arabia. Key pointsO_LIThe nursing costs and length of stay were lower in the ICU than in the general ward. C_LIO_LIThe costs of hospitalization in general medical wards were less than those of admission to the ICU. C_LIO_LIThese cost data will be valuable for future researchers evaluating the COVID-19 pandemics increasing health care economic burden in Saudi Arabia and the implementation of cost-effective models to assess the possible implications of COVID-19 prevention and treatment initiatives. C_LI

3.
J Electrocardiol ; 53: 89-94, 2019.
Article in English | MEDLINE | ID: mdl-30716528

ABSTRACT

BACKGROUND: An easy-to-operate ECG recorder should be useful for newborn screening for heart conditions, by health care workers - or parents. We developed a one-piece electrode strip and a compact, 12­lead ECG recorder for newborns. METHOD: We enrolled 2582 newborns in a trial to assess abilities of parents to record a 12­lead ECG on their infants (2-4 weeks-old). Newborns were randomized to recordings by parents (1290) or our staff (1292 controls). Educational backgrounds of parents varied, including 64% with no more than a high school diploma. RESULTS: For newborns randomized to parent recorded ECGs, 94% of parents completed a 10-minute recording. However, 42.6% asked for verbal help, and 12.7% needed physical help. ECG quality was the same for recordings by parents versus staff. CONCLUSIONS: By use of a one-piece electrode strip and a compact recorder, 87% of parents recorded diagnostic quality ECGs on their newborn infants, with minimal assistance.


Subject(s)
Arrhythmias, Cardiac/diagnosis , Electrocardiography/instrumentation , Mass Screening/instrumentation , Parents , Electrodes , Equipment Design , Female , Humans , Infant, Newborn , Male , Miniaturization
4.
Eur J Neurol ; 26(7): 969-e71, 2019 07.
Article in English | MEDLINE | ID: mdl-30685877

ABSTRACT

BACKGROUND AND PURPOSE: Pre-surgical evaluation of pediatric patients with drug-resistant focal epilepsy and negative (non-lesional) magnetic resonance imaging (MRI) is particularly challenging. Focal cortical dysplasia (FCD), a frequent pathological substrate in such setting, may be subtle on MRI and evade detection. The aim of this study was to use voxel-based MRI postprocessing to improve the detection of subtle FCD in pediatric surgical candidates. METHODS: A consecutive cohort of pediatric patients undergoing pre-surgical evaluation with a negative MRI by visual analysis was included. MRI postprocessing was performed using a voxel-based morphometric analysis program (MAP) on T1-weighted volumetric MRI, with comparison to an age-specific normal pediatric database. The pertinence of MAP-positive areas was confirmed by surgical outcome and pathology. RESULTS: A total of 78 patients were included. Forty-four patients (56%) had positive MAP regions. Complete resection of the MAP-positive regions was positively associated with seizure-free outcome compared with the no/partial resection group (P < 0.001). Patients with no/partial resection of the MAP-positive regions had worse seizure outcomes than the MAP-negative group (P = 0.002). The MAP-positive rate was 100%, 77%, 63% and 40% in the 3-5, 5-10, 10-15 and 15-21 year age groups, respectively. MAP-positive rates were 45% in patients with temporal resection and 63% in patients with extratemporal resection. Complete resection of the MAP-positive regions was positively associated with seizure-free outcome in the extratemporal group (P = 0.001) but not in the temporal group (P = 0.070). CONCLUSION: Our data suggest the importance of using MRI postprocessing in the pre-surgical evaluation process of pediatric epilepsy patients with apparently normal MRI.


Subject(s)
Drug Resistant Epilepsy/diagnostic imaging , Seizures/diagnostic imaging , Adolescent , Child , Child, Preschool , Databases, Factual , Drug Resistant Epilepsy/surgery , Female , Humans , Image Processing, Computer-Assisted , Magnetic Resonance Imaging/methods , Male , Retrospective Studies , Seizures/surgery , Young Adult
5.
Public Health Action ; 7(Suppl 1): S40-S46, 2017 Jun 21.
Article in English | MEDLINE | ID: mdl-28744438

ABSTRACT

Setting: All 100 health facilities providing maternal services in Moyamba, Sierra Leone, a rural district that experienced a smaller Ebola outbreak than other areas. Objective: To compare trends in antenatal care (the first and fourth visit [ANC1 and ANC4]), delivery, and postnatal care (PNC1) service utilisation before, during and after the Ebola outbreak (2014-2016). Design: Cross-sectional study using secondary programme data. Results: A total of 211 Ebola cases occurred in Moyamba District. The mean number of monthly ANC visits remained stable over time, except for the subset of care provided via outreach visits where, compared with before the outbreak (n = 390), ANC1 visits declined during (n = 331, P = 0.002) and after the outbreak (n = 342, P = 0.03). Most (>97%) deliveries occurred in health facilities, assisted by maternal and child health aides (>80%). During the outbreak, the mean number of community-based deliveries per month declined from 31 to 21 (P = 0.03), and the mean number of deliveries performed by midwives increased from 49 to 78 (P < 0.001) compared with before the outbreak. Before, during and after Ebola, there was no significant change in the mean number of live births (respectively n = 1134, n = 1110, n = 1162), maternal PNC1 (respectively n = 1110, n = 1105, n = 1165) or neonatal PNC1 (respectively n = 1028, n = 1050, n = 1085). Conclusion: In a rural district less affected by Ebola transmission than other areas, utilisation of maternal primary care remained robust, despite the outbreak.


Contexte : Les 100 structures de santé offrant des services de santé maternelle à Moyamba, Sierra Leone, un district rural qui a connu une petite flambée épidémique d'Ebola.Objectif : Comparer les tendances en matière d'utilisation des services de consultation prénatale (ANC1 et ANC4, c'est-à-dire la première consultation and la quatrième consultation ANC), d'accouchement et de soins postnataux (PNC1) avant, pendant et après la flambée épidémique d'Ebola (2014­2016).Schéma : Etude transversale recourant aux données secondaires du programme.Résultats : Il y a eu 211 cas d'Ebola dans le district. Le nombre moyen mensuel des ANC est resté stable dans le temps, à l'exception du sous-ensemble de soins offert à travers des stratégies avancées où, comparé à la période précédant la flambée épidémique (n = 390), les ANC1 ont décliné pendant (n = 331 ; P = 0,002) et après Ebola (n = 342 ; P = 0,03). La majorité des activités (<97%) a eu lieu dans des structures de santé, assistées par des auxiliaires de santé maternelle et infantile (<80%). Pendant la flambée épidémique, le nombre moyen d'accouchements ayant eu lieu en communauté par mois a décliné de 31 à 21 (P = 0,03), et le nombre moyen d'accouchements réalisés par des sages-femmes est passé de 49 à 78 (P < 0,001) par comparaison à la période antérieure. Il n'y a pas eu de changement significatif avant, pendant et après Ebola, dans le nombre moyen de naissances vivantes (n = 1134, n = 1110, n = 1162), de ANC1 maternelles (n = 1110, n = 1105, n = 1165) ou de consultation néonatales (n = 1028, n = 1050, n = 1085).Conclusion : Dans un district rural moins affecté par la transmission d'Ebola, l'utilisation des soins de santé primaires maternels a résisté à la flambée épidémique.


Marco de referencia: Los 100 establecimientos de atención de salud que cuentan con servicios de maternidad en Moyamba, un distrito rural de Sierra Leona donde el brote epidémico por enfermedad del Ébola fue menos intenso.Objetivo: Comparar las tendencias de la utilización de los servicios de atención prenatal (ANC1 et ANC4, es decir, la primera y la cuarta atención ANC), parto y atención posnatal (primera cita postnatal) antes del brote de enfermedad del Ébola, durante el mismo y después de él (del 2014 al 2016).Método: Fue este un estudio transversal con datos secundarios de los programas.Resultados: Se presentaron 211 casos de enfermedad por el virus del Ébola en el distrito. El promedio de consultas mensuales de atención prenatal permaneció estable con el transcurso del tiempo, con la excepción del subconjunto de cuidados prestados por conducto de citas extrainstitucionales, donde en comparación con el periodo anterior al brote (n = 390), las citas por ANC1 disminuyeron durante el brote (n = 331; P = 0,002) y después del mismo (n = 342; P = 0,03). La mayoría de los partos (>97%) tuvo lugar en los establecimientos sanitarios, atendido por auxiliares de salud maternoinfantil (>80%). Durante el brote epidémico, el promedio mensual de partos atendidos en la comunidad disminuyó de 31 a 21 (P = 0,03) y el promedio de partos atendidos por parteras aumentó de 49 a 78 (P < 0,001) en comparación con el período anterior al brote. No se observó ningún cambio significativo antes del brote, durante el mismo o después de él, con respecto al promedio de nacidos vivos (n = 1134, n = 1110 y n = 1162), ANC1 (n = 1110, n = 1105 y n = 1165) ni de primeras consultas posnatales del recién nacido (n = 1028, n = 1050 y n = 1085).Conclusión: En un distrito rural menos afectado por la transmisión de la enfermedad del Ébola, la utilización de los servicios primarios de atención materna resistió al brote epidémico.

6.
AJNR Am J Neuroradiol ; 37(12): 2348-2355, 2016 Dec.
Article in English | MEDLINE | ID: mdl-27609620

ABSTRACT

BACKGROUND AND PURPOSE: Rasmussen syndrome, also known as Rasmussen encephalitis, is typically associated with volume loss of the affected hemisphere of the brain. Our aim was to apply automated quantitative volumetric MR imaging analyses to patients diagnosed with Rasmussen encephalitis, to determine the predictive value of lobar volumetric measures and to assess regional atrophy differences as well as monitor disease progression by using these measures. MATERIALS AND METHODS: Nineteen patients (42 scans) with diagnosed Rasmussen encephalitis were studied. We used 2 control groups: one with 42 age- and sex-matched healthy subjects and the other with 42 epileptic patients without Rasmussen encephalitis with the same disease duration as patients with Rasmussen encephalitis. Volumetric analysis was performed on T1-weighted images by using BrainSuite. Ratios of volumes from the affected hemisphere divided by those from the unaffected hemisphere were used as input to a logistic regression classifier, which was trained to discriminate patients from controls. Using the classifier, we compared the predictive accuracy of all the volumetric measures. These ratios were used to further assess regional atrophy differences and correlate with epilepsy duration. RESULTS: Interhemispheric and frontal lobe ratios had the best prediction accuracy for separating patients with Rasmussen encephalitis from healthy controls and patient controls without Rasmussen encephalitis. The insula showed significantly more atrophy compared with all the other cortical regions. Patients with longitudinal scans showed progressive volume loss in the affected hemisphere. Atrophy of the frontal lobe and insula correlated significantly with epilepsy duration. CONCLUSIONS: Automated quantitative volumetric analysis provides accurate separation of patients with Rasmussen encephalitis from healthy controls and epileptic patients without Rasmussen encephalitis, and thus may assist the diagnosis of Rasmussen encephalitis. Volumetric analysis could also be included as part of follow-up for patients with Rasmussen encephalitis to assess disease progression.


Subject(s)
Brain/diagnostic imaging , Encephalitis/diagnostic imaging , Image Interpretation, Computer-Assisted/methods , Magnetic Resonance Imaging/methods , Adult , Atrophy/pathology , Brain/pathology , Encephalitis/pathology , Female , Humans , Male
7.
Mult Scler Relat Disord ; 5: 66-9, 2016 Jan.
Article in English | MEDLINE | ID: mdl-26856945

ABSTRACT

BACKGROUND: Optic neuritis has a diagnostic and prognostic significance in predicting the development of multiple sclerosis. Optical coherence tomography is being increasingly used to detect and monitor axonal damage in MS by measuring the retinal nerve fiber layer (RNFL). However, RNFL can be affected by edema and inflammation and obscure early axonal damage. OBJECTIVE: To study the pattern of change in the ganglion cell and inner plexiform layer compared to retinal nerve fibber layer in acute optic neuritis using spectral domain OCT. METHODS: Ten patients with acute optic neuritis were followed prospectively for 6 months with spectral domain optical coherence tomography. A group of 40 of eyes of 20 healthy controls was used for baseline comparison. RESULTS: The ganglion cell and inner plexiform layer (GCIPL) was significantly lower (thinner) at onset in patients' affected (p=0.009) eyes. Both RNFL and GCIPL were significantly lower in affected eyes at 6 months (p=0.012 and p=0.007) respectively compared to baseline. CONCLUSION: The GCIPL is probably more sensitive index of axonal loss than the RNFL in acute optic neuritis and could be a better index to detect neurodegeneration in multiple sclerosis. This can helpful in estimating early axonal loss and can potentially be used in therapeutic trials of neuroprotective drugs.


Subject(s)
Axons/pathology , Optic Neuritis/pathology , Retinal Ganglion Cells/pathology , Tomography, Optical Coherence/methods , Adult , Female , Humans , Male , Multiple Sclerosis/pathology , Prospective Studies , Young Adult
10.
Med Princ Pract ; 14(5): 349-53, 2005.
Article in English | MEDLINE | ID: mdl-16103702

ABSTRACT

OBJECTIVE: To describe the characteristic clinical features and the diagnostic findings in muscle histochemistry of multi-minicore disease in 5 children from two unrelated families in Kuwait. CLINICAL PRESENTATION: The 5 children who presented with muscle weakness, 2 siblings from family 1 and the remaining 3 from the other (family 2), represent the classical type of multi-minicore disease; however, the two families differ in the course of the disease. Family 1 had the non-progressive form while family 2 had progressive weakness with respiratory complications and scoliosis. The diagnosis was confirmed in the index patients by muscle histochemistry, which demonstrated the typical minicores, which are devoid of oxidative enzyme activity. CONCLUSION: Both families represent the classical form, however, clinical variability in the course of the illness was demonstrated in these two families.


Subject(s)
Muscle Weakness/diagnosis , Myopathy, Central Core/diagnosis , Child , Consanguinity , Disease Progression , Electromyography , Female , Genetic Predisposition to Disease , Humans , Infant , Kuwait , Male , Muscle Weakness/genetics , Muscle Weakness/physiopathology , Muscles/pathology , Myopathy, Central Core/genetics , Myopathy, Central Core/physiopathology , Respiratory Insufficiency/etiology , Scoliosis/etiology
11.
Neurol India ; 53(2): 216-8, 2005 Jun.
Article in English | MEDLINE | ID: mdl-16010063

ABSTRACT

Atrial myxomas are the most common primary tumors of the heart. Neurologic involvement usually occurs as a stroke with ischemic episodes. Following excision of cardiac myxomas, delayed neurologic events owing to aneurysms are rare and have not been reported from India. We report an operated case of left atrial myxoma. The patient initially presented with a stroke and 6 months after the surgery, developed multiple intracerebral hemorrhages due to the rupture of fusiform cerebral aneurysms, without recurrence of the cardiac tumor.


Subject(s)
Heart Neoplasms/complications , Intracranial Aneurysm/etiology , Myxoma/complications , Cerebral Angiography , Coronary Vessels/pathology , Heart Neoplasms/pathology , Heart Neoplasms/surgery , Humans , Intracranial Aneurysm/pathology , Magnetic Resonance Imaging , Male , Middle Aged , Myxoma/pathology , Myxoma/surgery
13.
Neurol India ; 52(1): 96-8, 2004 Mar.
Article in English | MEDLINE | ID: mdl-15069250

ABSTRACT

Isolated intracranial hypertension is a common manifestation of intracranial sino-venous thrombosis (ISVT). Markedly elevated intracranial tension presents with unusual features including cranial neuropathies and radiculopathy. We report two cases with ISVT, which presented with headache, papilledema, progressive visual loss, complete ophthalmoplegia and flaccid areflexic quadriparesis along with a normal sensorium. Magnetic resonance imaging (MRI) of the brain and cervical spinal cord showed no lesions that could account for the neurological deficits. Markedly elevated lumbar CSF pressure was noted in both cases. Nerve conduction study favored radiculopathy in one case and was normal in the other. Raised intracranial pressure was found to be the sole cause for the clinical manifestations. Visual impairment persisted in one patient despite lumbo-peritoneal shunting while the other died of septicemia. To our knowledge there are no previous reports of a syndrome comprising blindness, ophthalmoplegia and flaccid quadriplegia due to intracranial hypertension in ISVT.


Subject(s)
Blindness/complications , Intracranial Thrombosis/complications , Ophthalmoplegia/complications , Radiculopathy/complications , Adult , Anticoagulants/therapeutic use , Cerebral Angiography , Fatal Outcome , Female , Humans , Intracranial Thrombosis/surgery , Magnetic Resonance Imaging , Neurosurgical Procedures , Syndrome
15.
Am J Hematol ; 70(3): 228-31, 2002 Jul.
Article in English | MEDLINE | ID: mdl-12111768

ABSTRACT

Overt stroke is rare among sickle cell disease (SCD) patients in Kuwait. However, there are no previous studies of silent cerebral infarcts, which have been described in up to 20% of American children with Hb SS. We have carried out a prospective brain MRI study among otherwise normal SCD patients, who were consecutive patients seen in a 1-year period to document the prevalence of silent cerebral infarcts in children with sickle cell disease in Kuwait. Any patient with a previous seizure or other neurological abnormality was excluded. MRI was done with a 1.5 Tesla unit with super-conducting magnet. T1- and T2-weighted sagittal and axial sections and proton density axial images were obtained in 5-mm thick sections. The study group consisted of 30 (23 SS and 7 Sbeta(0)Thal) patients-19 males and 11 females-whose ages ranged from 6 to 17 (mean of 9.8 +/- 3.5) years. Hb F ranged from 11% to 35% with a mean of 22.8% +/- 5.7%. Only one patient, a 10-and-a-half-year-old boy with Hb SS, showed hyperintense signals in the parietal white matter, consistent with small infarcts, thus giving a prevalence of 3.3%. Silent brain infarcts are uncommon in our patients, and the protective factors remain to be fully elucidated.


Subject(s)
Anemia, Sickle Cell/complications , Brain Infarction/epidemiology , Fetal Hemoglobin/analysis , Adolescent , Anemia, Sickle Cell/blood , Brain Infarction/complications , Brain Infarction/diagnosis , Child , Erythrocyte Indices , Female , Hemoglobins/analysis , Humans , Kuwait/epidemiology , Magnetic Resonance Imaging , Male , Prospective Studies
16.
Hum Mutat ; 18(4): 308-18, 2001 Oct.
Article in English | MEDLINE | ID: mdl-11668614

ABSTRACT

Congenital insensitivity to pain with anhidrosis is an autosomal recessive hereditary disorder characterized by recurrent episodic fever, anhidrosis (inability to sweat), absence of reaction to noxious stimuli, self-mutilating behavior, and mental retardation. The human TRKA gene (NTRK1), located on chromosome 1q21-q22 encodes the receptor tyrosine kinase for nerve growth factor. We reported that TRKA is the gene responsible for CIPA and we developed a comprehensive strategy to screen for TRKA mutations and polymorphisms, as based on the gene's structure and organization. Here we report eight novel mutations detected as either a homozygous or heterozygous state in nine CIPA families from five countries. Mendelian inheritance of the mutations was confirmed in seven families for which samples from either parent were available. However, non-mendelian inheritance seems likely for the family when only samples from the mother and siblings, (but not from the father) were available. A paternal uniparental disomy for chromosome 1 is likely to be the cause of reduction to homozygosity of the TRKA gene mutation in this family. Interestingly, a Hispanic patient from the USA has two autosomal genetic disorders, CIPA and pyruvate kinase deficiency, whose genetic loci are both mapped to a closely linked chromosomal region. A splice mutation and a missense mutation were detected in the TRKA and PKLR genes from the homozygous proband, respectively. Thus, concomitant occurrence of two disorders is ascribed to a combination of two separate mutant genes, not a contiguous gene syndrome. This finding suggests a mechanism responsible for two autosomal genetic disorders in one patient. All these data further support findings that TRKA defects can cause CIPA in various ethnic groups. This will aid in diagnosis and genetic counseling of this painless but severe genetic disorder.


Subject(s)
Genetic Linkage/genetics , Hereditary Sensory and Autonomic Neuropathies/genetics , Mutation/genetics , Pyruvate Kinase/deficiency , Pyruvate Kinase/genetics , Receptor, trkA/genetics , Uniparental Disomy/genetics , Adolescent , Adult , Alleles , Child , Child, Preschool , Chromosome Mapping , Chromosomes, Human, Pair 1/genetics , DNA Mutational Analysis , Female , Haplotypes/genetics , Hereditary Sensory and Autonomic Neuropathies/complications , Hereditary Sensory and Autonomic Neuropathies/enzymology , Humans , Infant , Infant, Newborn , Male , Pedigree , Polymorphism, Genetic/genetics , Pyruvate Kinase/metabolism
17.
J Biomed Sci ; 8(2): 191-6, 2001.
Article in English | MEDLINE | ID: mdl-11287750

ABSTRACT

Spinal muscular atrophy (SMA) is an autosomal recessive disorder characterized by degeneration of lower motor neurons. We have assayed deletions in two candidate genes, the survival motor neuron (SMN) and neuronal apoptosis inhibitory protein (NAIP) genes, in 108 samples, of which 46 were from SMA patients, and 62 were from unaffected subjects. The SMA patients included 3 from Bahrain, 9 from South Africa, 2 from India, 5 from Oman, 1 from Saudi Arabia, and 26 from Kuwait. SMN gene exons 7 and 8 were deleted in all type I SMA patients. NAIP gene exons 5 and 6 were deleted in 22 of 23 type I SMA patients. SMN gene exon 7 was deleted in all type II SMA patients while exon 8 was deleted in 19 of 21 type II patients. In 1 type II SMA patient, both centromeric and telomeric copies of SMN exon 8 were deleted. NAIP gene exons 5 and 6 were deleted in only 1 type II SMA patient. In 1 of the 2 type III SMA patients, SMN gene exons 7 and 8 were deleted with no deletion in the NAIP gene, while in the second patient, deletions were detected in both SMN and NAIP genes. None of the 62 unaffected subjects had deletions in either the SMN or NAIP gene. The incidence of biallelic polymorphism in SMN gene exon 7 (BsmAI) was found to be similar (97%) to that (98%) reported in a Spanish population but was significantly different from that reported from Taiwan (0%). The incidence of a second polymorphism in SMN gene exon 8 (presence of the sequence ATGGCCT) was markedly different in our population (97%) and those reported from Spain (50%) and Taiwan (0%).


Subject(s)
Gene Deletion , Muscular Atrophy, Spinal/genetics , Muscular Atrophy, Spinal/physiopathology , Nerve Tissue Proteins/genetics , Age of Onset , Cyclic AMP Response Element-Binding Protein , Ethnicity/genetics , Exons/genetics , Genetic Variation/genetics , Humans , Infant , Molecular Sequence Data , Neuronal Apoptosis-Inhibitory Protein , Phenotype , Polymerase Chain Reaction , Polymorphism, Genetic/genetics , RNA-Binding Proteins , SMN Complex Proteins
18.
Am J Hum Genet ; 64(6): 1570-9, 1999 Jun.
Article in English | MEDLINE | ID: mdl-10330344

ABSTRACT

Congenital insensitivity to pain with anhidrosis (CIPA) is characterized by recurrent episodes of unexplained fever, anhidrosis (inability to sweat), absence of reaction to noxious stimuli, self-mutilating behavior, and mental retardation. Human TRKA encodes a high-affinity tyrosine kinase receptor for nerve growth factor (NGF), a member of the neurotrophin family that induces neurite outgrowth and promotes survival of embryonic sensory and sympathetic neurons. We have recently demonstrated that TRKA is responsible for CIPA by identifying three mutations in a region encoding the intracellular tyrosine kinase domain of TRKA in one Ecuadorian and three Japanese families. We have developed a comprehensive strategy to screen for TRKA mutations, on the basis of the gene's structure and organization. Here we report 11 novel mutations, in seven affected families. These are six missense mutations, two frameshift mutations, one nonsense mutation, and two splice-site mutations. Mendelian inheritance of the mutations is confirmed in six families for which parent samples are available. Two mutations are linked, on the same chromosome, to Arg85Ser and to His598Tyr;Gly607Val, hence, they probably represent double and triple mutations. The mutations are distributed in an extracellular domain, involved in NGF binding, as well as the intracellular signal-transduction domain. These data suggest that TRKA defects cause CIPA in various ethnic groups.


Subject(s)
Hypohidrosis/genetics , Mutation , Nerve Growth Factors/metabolism , Pain Insensitivity, Congenital/genetics , Proto-Oncogene Proteins/genetics , Receptor Protein-Tyrosine Kinases/genetics , Receptors, Nerve Growth Factor/genetics , Base Sequence , Child, Preschool , DNA Primers , Female , Humans , Hypohidrosis/complications , Male , Molecular Sequence Data , Pain Insensitivity, Congenital/complications , Pedigree , Protein Binding , Proto-Oncogene Proteins/metabolism , RNA Splicing , Receptor Protein-Tyrosine Kinases/metabolism , Receptor, trkA , Receptors, Nerve Growth Factor/metabolism
20.
Hum Hered ; 48(2): 61-6, 1998.
Article in English | MEDLINE | ID: mdl-9526164

ABSTRACT

Forty-two Arab children with Duchenne muscular dystrophy (DMD) were studied for intragenic deletions in 25 exons of the dystrophin gene using three different multiplex PCR sets each amplifying a total of 9, 9 and 6 different exons, respectively. Exon 22 was amplified individually. Deletions were found in 78, 76 and 12% of DMD patients with each of the three sets, respectively. With all the three sets, the detection rate increased to 86% (36 of 42 patients). Fifty percent of the deleted exons were located in the distal hot spot, 8% in the proximal hot spot while 42% were scattered over both. This study, the first in an Arab population and only the second to use three PCR multiplex sets, documents one of the highest deletion detection rates in DMD.


Subject(s)
Arabs/genetics , Dystrophin/genetics , Exons , Gene Deletion , Muscular Dystrophies/genetics , Child , Child, Preschool , Genetic Testing , Humans , Infant , Male , Muscular Dystrophies/ethnology
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