Publications by authors named "Dilshad A Khan"

Coronary artery disease (CAD) is one of the most common causes of sudden cardiac arrest, accounting for a large percentage of global mortality. A timely diagnosis and detection may save a person's life. The research suggests a methodological framework for non-invasive risk stratification based on information only possible after invasive coronary angiography.

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Objective: To compare the efficacy of tocotrienol and tocopherol in the management of patients with atherosclerotic cardiovascular diseases.

Methods: The systematic review was conducted in line with Preferred Reporting Items for Systematic Reviews and Meta- Analyses guidelines 2020, and comprised literature search from 2002 till January 5, 2023, on PubMed, Google Scholar, Cochrane Library, Google, Wiley-Inter Science Library, Medline, SpringerLink, Taylor and Francis databases. The search was conducted using key words, such as: "tocopherol", "tocotrienol", "vitamin E", "dyslipidaemia", "cardiovascular diseases" "cardioprotective", "hypercholesterolemia" and "atherosclerosis" along with Boolean operators.

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Objective: To determine the effect of δ-tocotrienol and resveratrol mixture (TRM) supplementation in comparison to placebo for 24 weeks, on the relative expression of miRNAs (miRNA-130b-5p, miRNA-221-5p, miR-15b-5p, miRNA-122-5p, and miRNA-376b-5p) in patients with Metabolic syndrome (MetS).

Design: This randomized placebo-controlled trial was conducted at the tertiary care institute of the NUMS, Rawalpindi, Pakistan. A total of 82 adult MetS patients were enrolled and randomly grouped into the TRM group (n = 41) and the Placebo group (n = 41).

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Article Synopsis
  • The study aimed to compare the bioavailability of annatto-based tocotrienol versus palm tocotrienol-rich fraction in healthy volunteers to improve therapeutic outcomes.
  • A systematic review of 230 articles was conducted, resulting in 50 eligible studies, with 7 selected for detailed analysis, showing annatto-based tocotrienol had superior pharmacokinetic parameters.
  • The delta isomer of annatto-based tocotrienol exhibited the highest bioavailability, with key metrics significantly better than those of the palm-derived tocotrienol.
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MicroRNAs (miRNAs) play a key role in the regulation of genes for normal metabolism in the liver. Dysregulation of miRNAs is involved in the development and progression of non-alcoholic fatty liver disease (NAFLD). We aimed to explore changes in circulating miRNA expression in response to delta-tocotrienol (δT3) and alpha-tocopherol (αTF) supplementation and correlate them with relevant biochemical markers in patients with NAFLD.

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Metabolic syndrome (MetS) is a cluster of central obesity, hypertension, hyperglycemia, and dyslipidemia. It is a global health issue with an increased risk of cardiovascular disease. Recently, a few natural products have been reported with promising anti-inflammatory and antioxidative effects.

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Early diagnosis of coronary artery disease (CAD) in patients with chest pain is a challenge. Currently diagnosis of CAD is confirmed by coronary angiography, which is invasive and not easily available in developing countries. Therefore, it is imperative to establish noninvasive biomarker for early diagnosis of CAD in patients with angina and determine the diagnostic accuracy of inflammatory biomarkers of atherosclerosis in comparison to angiography and correlate with severity of CAD in patients with angina.

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Objective: We aimed to compare the efficacy of δ-tocotrienol with α-tocopherol in the treatment of patients with non-alcoholic fatty liver disease (NAFLD).

Design And Interventions: This study was a double-blinded, active-controlled trial. The patients with NAFLD were randomly assigned to receive either δ-tocotrienol 300 mg or α-tocopherol 268 mg twice daily for 48 weeks.

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Diarrhea is the leading cause of childhood morbidity and mortality particularly in developing countries and rotavirus has been identified as the major pathogen associated with diarrheal infections. This study was conducted to detect genotypic distribution of predominant rotavirus strains circulating in children suffering from acute gastroenteritis in Rawalpindi, Pakistan. Stool specimens were collected from children ≤5 years of age, visiting Military Hospital, Rawalpindi, with signs and symptoms of acute gastroenteritis.

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Objective: The objective was to determine the effects of resveratrol supplementation on glucose homeostasis, oxidative stress, inflammation and microRNAs expression in patients with diabetes mellitus type 2 on oral hypoglycemic drugs.

Method: This was a randomized, double blinded placebo-controlled parallel group trial. The diabetic patients (n = 110) were randomly assigned either to resveratrol (n = 55) and placebo (55) groups after informed consent and given once daily resveratrol 200 mg and cellulose capsules respectively for 24 weeks.

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Objective: To study the effects of delta-tocotrienol on glycaemic control parameters in individuals with pre-diabetes.

Methods: The randomised control trial was conducted at the Armed Forces Institute of Pathology, Rawalpindi, Pakistan, from July 15 to November 15, 2019, and comprised individuals aged 18-60 years having fasting plasma glucose of 5.6 to 6.

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Article Synopsis
  • The Vitamin D External Quality Assessment Scheme (DEQAS) sends human serum samples to over 1000 global participants to measure total serum 25-hydroxyvitamin D levels four times a year.
  • A study was conducted to determine if shipping these samples at ambient temperature affects the reliability of various 25(OH)D assays compared to shipping them frozen.
  • Results showed significant differences for four specific assays when samples were shipped ambiently, but all 14 LC-MS/MS assays showed no significant differences, indicating they remained stable during shipping at room temperature.
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An interlaboratory comparison study was conducted by the Vitamin D Standardization Program (VDSP) to assess the performance of ligand binding assays (Part 2) for the determination of serum total 25-hydroxyvitamin D [25(OH)D]. Fifty single-donor samples were assigned target values for concentrations of 25-hydroxyvitamin D [25(OH)D], 25-hydroxyvitamin D [25(OH)D], 3-epi-25-hydroxyvitamin D [3-epi-25(OH)D], and 24R,25-dihydroxyvitamin D [24R,25(OH)D] using isotope dilution liquid chromatography-tandem mass spectrometry (ID LC-MS/MS). VDSP Intercomparison Study 2 Part 2 includes results from 17 laboratories using 32 ligand binding assays.

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Article Synopsis
  • - An interlaboratory study was conducted by the Vitamin D Standardization Program (VDSP) to evaluate how well Standard Reference Materials (SRMs) and proficiency testing samples can be used interchangeably for measuring serum total 25-hydroxyvitamin D levels using different assay methods.
  • - A total of 50 single-donor serum samples were tested across 28 laboratories using a mix of 20 ligand binding assays and 14 LC-MS/MS methods, with target values assigned based on reference measurement procedures.
  • - Results showed that certain SRM and proficiency testing samples were found to be non-commutable for specific assays, particularly indicating that SRM 972a (with high 3-epi-25(OH)
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The study aimed to ascertain the effects of delta-tocotrienol (δT3) supplementation on glycemic control, oxidative stress, inflammation and related micro-ribonucleic acid (miRNA) expression in patients with type 2 diabetes mellitus (T2DM). Total 110 patients of T2DM on oral hypoglycemic agents, were randomly divided into tocotrienol and placebo groups and given 250 mg δT3 or cellulose soft gel capsule once daily respectively for 24 weeks. Glycemic control, oxidative stress, inflammatory biomarkers, and miRNAs expression were measured in serum at baseline and end of the intervention by using standard laboratory methods.

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Objective: The aim of this study was to examine the effects of delta-tocotrienol (δ-tocotrienol) supplementation on biochemical markers of hepatocellular injury and steatosis in patients with nonalcoholic fatty liver disease (NAFLD).

Design: The study design was a two-group, randomized, double-blind, placebo-controlled trial. The patients with NAFLD were randomly assigned to receive δ-tocotrienol 300 mg twice daily or placebo for 24 weeks.

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Background: δ-Tocotrienol is a naturally occurring proteasome inhibitor, which has the capacity to inhibit proliferation and induce apoptosis in several cancer cells obtained from several organs of humans, and other cancer cell lines. Moreover, results of plasma total mRNAs after δ-tocotrienol feeding to hepatitis C patients revealed significant inhibition in the expression of pro-inflammatory cytokines (TNF-α, VCAM1, proteasome subunits) and induction in the expression of ICAM1 and IFN-γ after post-treatment. This down-regulation of proteasome subunits leads to autophagy, apoptosis of immune cells and several genes.

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Objective: To find out the use of screening and confirmatory tests for diagnosis of multiple myeloma as ordered by clinicians.

Study Design: An Audit.

Place And Duration Of Study: Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, Rawalpindi, from January 2012 to January 2017.

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Background: Cancer is second most common cause of death in the United State. There are over 100 different types of cancer associated with different human organs, predominantly breast, liver, pancreas, prostate, colon, rectum, lung, and stomach. We have recently reported properties of pro-inflammatory (for treatment of various types of cancers), and anti-inflammatory (for cardiovascular disease and diabetes) compounds.

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Objective: To determine the mean hemoglobin HbA1C levels of disease-free adults in a local population and its optimum cutoff for the diagnosis of diabetes.

Study Design: Cross-sectional study.

Place And Duration Of Study: Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, Rawalpindi, from January to September 2015.

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Background: Premature Coronary Artery Disease (PCAD) occurs almost a decade earlier in the South Asian population as compared to the West. Inclusion of genetic information can prove to be a robust measure to improve early risk prediction of PCAD. Aim was to estimate the genotypic distribution and risk allele frequencies of 13 Coronary Artery Disease (CAD) risk Single Nucleotide Polymorphisms in loci identified by the CARDIoGRAMplusC4D consortium namely MIA3 rs17465637; 9p21 rs10757274; CXCL12 rs1746048; APOA5 rs662799; APOB rs1042031; LPA rs3798220; LPA 10455872; MRAS rs9818870; LPL rs328; SORT1 rs646776; PCSK9 rs11591147; APOE rs429358; APOE rs7412 in Pakistani PCAD patients and controls.

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Objective: To determine the diagnostic accuracy of non-fasting lipid profile in the diagnosis of hyperlipidemia, taking fasting lipid profile as gold standard, in adult population.

Study Design: Cross-sectional validation study.

Place And Duration Of Study: Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, Rawalpindi, from July to December 2014.

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Aims: Pro- and anti-inflammatory cytokines play a significant role in early atherosclerosis. Linkage disequilibrium patterns differ between ethnic groups pointing toward the need to develop population-specific gene risk scores. Our objective was to investigate the role of a cytokine gene score in the risk prediction of premature coronary artery disease (PCAD).

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Background: Genetic information has the potential to create a more personalised, prompt, early and accurate risk evaluation. The effect of these genetic variants on the serum biomarker levels (phenotype) needs to be studied to assess their potential causal role in the pathogenesis of premature coronary artery disease (PCAD). Objectives were to determine the genotypic distribution of interleukin (, tumour necrosis factor- () and single nucleotide polymorphisms (SNPs) in Pakistani PCAD cases and disease free controls and to study the effect of these gene polymorphisms on the serum cytokine levels (IL18, TNFA, IL6 and IL10) and cytokine imbalance (IL18:IL10 and TNFA:IL10).

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Background: Tocotrienols has been known to lower serum lipid parameters below 500 mg/d, while increase lipid parameters at higher dose of 750 mg/d. δ-Tocotrienol has a novel inflammatory property of concentration-dependent inhibition and activation. Therefore, inhibition (anti-inflammatory) property of tocotrienols at low doses is useful for cardiovascular disease, whereas, activation (pro-inflammatory) property using high dose is found effective for treatments of various types of cancer.

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