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result(s) for
"Patel, Dhaval T"
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Tumor Size and Presence of Metastatic Disease at Diagnosis are Associated with Disease-Specific Survival in Parathyroid Carcinoma
2018
BackgroundThe incidence of parathyroid carcinoma is reported to be rising. There is minimal data on prognostic variables associated with cancer-specific survival. The objectives of this study were to evaluate the trends in incidence and assess prognostic factors.MethodsA retrospective review of the SEER database between 1973 and 2014 was performed, identifying 520 patients with parathyroid carcinoma. Population-adjusted incidence rates were calculated in 4-year intervals. A Cochrane-Armitage test was performed to analyze changes in trend in incidence, tumor size, and extent of disease. Age, year of diagnosis, race, gender, extent of disease, surgical resection, treatment with radiation, tumor size, and lymph node status were assessed using Mantel-Cox log rank test. Multivariate analysis was performed by Cox regression analysis.ResultsThe incidence of parathyroid carcinoma has been increasing since 1974 from 2 to 11 cases per 10 million people but has since stabilized at 11 cases per 10 million people since 2001. The increasing incidence was attributed to locoregional disease and tumor size < 3 cm. The presence of metastatic disease [hazard ratio (HR) 111.4, 95% confidence interval (CI) 20.6–601.8, p < 0.0001) and tumor size > 3 cm (HR 5.6, 95% CI 1.5–21.2, p = 0.011] were associated with worse cancer-specific survival by univariate and multivariate analyses.ConclusionsThe incidence of parathyroid carcinoma has remained stable over the past decade. Tumor size < 3 cm and regional disease have increased in incidence. Patients with metastatic disease and tumors > 3 cm have worse cancer-specific survival. These findings can be incorporated in the development of a staging system for parathyroid carcinoma.
Journal Article
Lactiplantibacillus plantarum PGB02 Improved Serum Cholesterol Profile by Tweaking Genes Involved in Cholesterol Homeostasis in Male Swiss Albino Mice
2023
The effect of Lactiplantibacillus plantarum PGB02 isolated from buttermilk on serum cholesterol profile of normal and hypercholesterolemic mice was evaluated. Further changes in the expression of mice genes were determined. The hypercholesterolemia was induced in experimental mice by feeding high cholesterol and fat diet. Serum cholesterol parameters, physical parameters, cholic acid excretion, and cholesterol metabolism related gene expression analysis was carried out. L. plantarum PGB02 efficiently reduced total cholesterol, triglycerides, and LDL-cholesterol and improved HDL-cholesterol in hypercholesterolaemic mice. Body weight was reduced and fecal cholic acid increased in probiotic treatment groups. Gene expression analysis revealed that L. plantarum PGB02 up-regulated the expression of LDL receptors, CYP7A1, ABCA1, ABCG5, ABCG8, and down-regulated the expression of FXR and NPC1L1 genes. Summarizing the mechanism, L. plantarum PGB02 improved hypercholesterolemia by increasing bile acid synthesis and excretion, reducing exogeneous cholesterol absorption from the intestine, and increased LDL clearance through upregulation of LDL-receptors. The present study has given insight into the mechanism of serum cholesterol reduction by bile salt hydrolase positive L. plantarum PGB02 in mice. L. plantarum PGB02 reduced the serum cholesterol level through increased bile acid synthesis and deconjugation and reduced absorption of cholesterol in the intestine. Isolate PGB02 shown cholesterol removal potential as good as statin.
Journal Article
SUN-115 Distinct DNA Methylation Signature in Neuroendocrine Tumors of Different Primary Sites and Hereditary Predisposition
2020
Objective There is scant data of the genome-wide methylome alterations in neuroendocrine tumors (NET). Thus, the goal of this study was to compare the DNA methylation signature of NETs with respect to various primary sites and inherited genetic predisposition syndromes including von Hippel-Lindau (VHL) and multiple endocrine neoplasia type 1 (MEN1). Methods Genome-wide DNA methylation analysis of 96 NETs (primary and metastatic) was performed by using the Illumina Infinium EPIC Array. Principal component analysis (PCA) and unsupervised clustering analyses were performed to identify distinct methylome signatures. The methylation status of genetic drivers such as APC were assessed by primary site. Results A total of 835,424 CpGs methylation sites were quantified. Hypermethylated CpG sites were detected more frequently in sporadic vs. MEN1-related vs. VHL-related NETs, respectively (p < 0.001 for all comparisons), while hypomethylated CpGs sites were more common in VHL-related NETs vs. sporadic and MEN1-related NETs (p<0.001 for both comparisons). Small-intestinal NETs (SINETs) had the most differences at CpGs with the highest number of hyper- and hypomethylated CpG sites, followed by duodenal NETs (DNETs) and pancreatic NETs (PNETs, p<0.001 for all comparisons). PCA showed distinct clustering of SINETs and three NETs of unknown primary. Sporadic, VHL-related and MEN1-related PNETs formed distinct groups on PCA. VHL-related NETs clustered separately showing pronounced CpG hypomethylation, while sporadic and MEN1-related NETs clustered together showing relative CpG hypermethylation. In a subgroup analysis, MEN1-related SINETs, DNETs and gastric NETs had distinct methylome signatures, respectively, with complete separation by PCA and unsupervised hierarchical clustering. Furthermore, we found CpG hypermethylation in the APC (adenomatous polyposis coli) gene, specifically in the 1A promoter, with higher methylation levels in gastric- and DNETs vs. SINETs, PNETs and NETs of unknown primary (p < 0.001 for all comparisons). Conclusion Various primary NET sites and genetically predisposed MEN1-related NETs have distinct DNA CpG methylation signatures. The methylome signatures identified in this study may be useful for non-invasive molecular characterization of NETs, through DNA methylation profiling of biopsy samples or circulating tumor DNA.
Journal Article
Ethanolamine and Phosphatidylethanolamine: Partners in Health and Disease
2017
Phosphatidylethanolamine (PE) is the second most abundant phospholipid in mammalian cells. PE comprises about 15–25% of the total lipid in mammalian cells; it is enriched in the inner leaflet of membranes, and it is especially abundant in the inner mitochondrial membrane. PE has quite remarkable activities: it is a lipid chaperone that assists in the folding of certain membrane proteins, it is required for the activity of several of the respiratory complexes, and it plays a key role in the initiation of autophagy. In this review, we focus on PE’s roles in lipid-induced stress in the endoplasmic reticulum (ER), Parkinson’s disease (PD), ferroptosis, and cancer.
Journal Article
Comparative yield of molecular diagnostic algorithms for autism spectrum disorder diagnosis in India: evidence supporting whole exome sequencing as first tier test
2023
Background
Autism spectrum disorder (ASD) affects 1 in 100 children globally with a rapidly increasing prevalence. To the best of our knowledge, no data exists on the genetic architecture of ASD in India. This study aimed to identify the genetic architecture of ASD in India and to assess the use of whole exome sequencing (WES) as a first-tier test instead of chromosomal microarray (CMA) for genetic diagnosis.
Methods
Between 2020 and 2022, 101 patient-parent trios of Indian origin diagnosed with ASD according to the Diagnostic and Statistical Manual, 5th edition, were recruited. All probands underwent a sequential genetic testing pathway consisting of karyotyping, Fragile-X testing (in male probands only), CMA and WES. Candidate variant validation and parental segregation analysis was performed using orthogonal methods.
Results
Of 101 trios, no probands were identified with a gross chromosomal anomaly or Fragile-X. Three (2.9%) and 30 (29.7%) trios received a confirmed genetic diagnosis from CMA and WES, respectively. Amongst diagnosis from WES, SNVs were detected in 27 cases (90%) and CNVs in 3 cases (10%), including the 3 CNVs detected from CMA. Segregation analysis showed 66.6% (n = 3 for CNVs and n = 17 for SNVs) and 16.6% (n = 5) of the cases had
de novo
and recessive variants respectively, which is in concordance with the distribution of variant types and mode of inheritance observed in ASD patients of non-Hispanic white/ European ethnicity.
MECP2
gene was the most recurrently mutated gene (n = 6; 20%) in the present cohort. Majority of the affected genes identified in the study cohort are involved in synaptic formation, transcription and its regulation, ubiquitination and chromatin remodeling.
Conclusions
Our study suggests
de novo
variants as a major cause of ASD in the Indian population, with Rett syndrome as the most commonly detected disorder. Furthermore, we provide evidence of a significant difference in the diagnostic yield between CMA (3%) and WES (30%) which supports the implementation of WES as a first-tier test for genetic diagnosis of ASD in India.
Journal Article
Correlation of body mass index (BMI) with saliva and blood glucose levels in diabetic and non-diabetic patients
2023
Background: To compare and correlate the relationship between body mass index (BMI) and blood and salivary glucose (mean values) in patients with diabetes and non-diabetic control group patients. Materials and Methods: In the study, 100 patients were included, 50 patients each-patients with diabetes and non-diabetic control group. Each patient had their BMI measured as well as unstimulated whole saliva collected and blood drawn. Results: When compared to BMI, blood glucose (mean), and salivary glucose (mean) in healthy controls, BMI, blood glucose, and salivary glucose values in diabetic patients were considerably higher. Conclusion: Patients who have a higher BMI are more likely to develop diabetes.
Journal Article
Restricting passive attacks in 6G vehicular networks: a physical layer security perspective
2023
Modern wireless technologies confirm the massive connectivity with sufficient data rate in intelligent transportation systems. Passive attacks may compromise the user’s transmission with increased amenities. Physical layer security can protect transmissions. The paper investigates outage probability (OP) and secrecy outage probability (SOP) for 6G enabled vehicular networks with passive eavesdroppers. The work considers the vehicular to infrastructure scenario with re configurable intelligent surfaces (RIS) instead of power-hungry roadside units. The vehicles and passive eavesdroppers are equipped with dual antennas. Specifically, for 6G vehicular networks, this work presents the analytical expressions for the received signal-to-noise ratio (SNR). We derive first-order secrecy metrics, such as outage probability and secrecy outage probability, from SNR expressions. We have derived SNR expressions for two initial receiver locations (near and far from the legitimate). Due to their robustness towards road parameters and signal parameters, the developed expressions aid in designing and simulating secrecy systems. We conclude that RIS can be more effective than regular access points because no major fluctuations have been observed in secrecy metrics under the influence of RIS.
Journal Article
Safety and immunogenicity of a new formulation of a pentavalent DTwP-HepB-Hib vaccine in healthy Indian infants–A randomized study
by
Aloysia D’Cor, Naveena
,
Jagga, Sathish Reddy
,
Dhaded, Sangappa Malappa
in
Antibodies
,
Antigens
,
Biology and Life Sciences
2023
Pentavalent vaccines (DTP-HepB-Hib) have been introduced in many countries in their routine public immunization programmes to protect against diphtheria (D), tetanus (T), pertussis (P), hepatitis B (Hep B) and Hemophilus influenzae type b (Hib) diseases. This study compared the safety and immunogenicity of a new formulation of a whole-cell Bordetella pertussis (wP) based pentavalent vaccine (DTwP-HepB-Hib). The new formulation was developed using well-characterized hepatitis B and pertussis whole cell vaccine components.
This was a phase III, observer-blind, randomized, non-inferiority, multi-center study conducted in India among 460 infants who were followed up for safety and immunogenicity for 28 days after administration of three doses of either investigational or licensed comparator formulations at 6-8, 10-12 and 14-16 weeks of age.
The investigational formulation of DTwP-HepB-Hib vaccine was non-inferior to the licensed formulation in terms of hepatitis B seroprotection rate (% of subjects with HepB antibodies ≥10mIU/mL were 99.1% versus 99.0%, respectively, corresponding to a difference of 0.1% (95% CI, -2.47 to 2.68)) and pertussis immune responses (adjusted geometric mean concentrations of antibodies for anti-PT were 76.7 EU/mL versus 63.3 EU/mL, with a ratio of aGMTs of 1.21 (95% CI, 0.89-1.64), and for anti-FIM were 1079 EU/mL versus 1129 EU/mL, with a ratio of aGMTs of 0.95 (95% CI, 0.73-1.24), respectively). The immune responses to other valences (D, T, and Hib) in the two formulations were also similar. The safety profile of both formulations was found to be similar and were well tolerated.
The investigational DTwP-HepB-Hib vaccine formulation was immunogenic and well-tolerated when administered as three dose primary series in infants.
Clinical Trials Registry India number: CTRI/2018/12/016692.
Journal Article
Profile of Medicaid enrollees with sickle cell disease: A high need, high cost population
2021
Sickle cell disease is a progressively debilitating genetic condition that affects red blood cells and can result in a variety of serious medical complications, reduced life expectancy, and diminished quality of life. Medicaid nationwide covered 66 percent of sickle cell disease hospitalizations in 2004 and 58 percent of emergency department visits for the disease between 1999 and 2007. Using Medicaid data from four states with large populations that account for more than one-third of Medicaid program enrollment, we examined the characteristics of those with sickle cell disease. We found instances of mortality rates more than nine times the age-adjusted population average (in Texas, a mortality rate for Medicaid enrollees with SCD of 1.11 percent compared to 0.12 percent overall); rates of disability-related eligibility–which is associated with long-term Medicaid enrollment–of up to 69 percent; and half or more of affected enrollees having (all-cause) hospital stays, emergency department visits, and opioid prescription fills. With gene therapies on the horizon that will spur discussions of treatment coverage, costs, and outcomes for people with sickle cell disease, it is important for relevant stakeholders to understand the affected populations.
Journal Article