Publications by authors named "Hasan Shahriar"

Innovation is key to gaining a sustainable edge in an increasingly competitive global manufacturing landscape. For Bangladesh's manufacturing sector to survive and thrive in today's cutthroat business environment, adopting transformative technologies such as the Internet of Things (IoT) is not a luxury but a necessity. This article tackles the formidable task of identifying and comprehensively evaluating the impediments to IoT adoption in the Bangladeshi manufacturing industry.

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Self-medication with antibiotics is a growing public health concern. Antibiotics are easily accessible on requested from pharmacies throughout the majority of developing countries. The present study aimed to determine the prevalence of self-medication with antibiotics among university students in Bangladesh, as well as to evaluate their knowledge and practices related to antibiotics and its resistance.

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Musculoskeletal (MS) pain is widely prevalent and is an important health issue for desk-based employees which has a negative impact on both personal and work life. This study aimed to determine the MS pain status and its association with mental health and other individual factors among desk-based officials of Dhaka, Bangladesh. This cross-sectional study comprised a sample of 526 desk-based officials from Dhaka, Bangladesh.

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Background: Chronic arsenic (As) exposure is a global environmental health issue. Inorganic As (InAs) undergoes methylation to monomethyl (MMAs) and dimethyl-arsenical species (DMAs); full methylation to DMAs facilitates urinary excretion and is associated with reduced risk for As-related health outcomes. Nutritional factors, including folate and creatine, influence one-carbon metabolism, the biochemical pathway that provides methyl groups for As methylation.

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  • The paper reviews the challenges and gaps in solid waste management policies and practices in Bangladesh, focusing on Dhaka's waste management system.
  • It employs a multi-method approach, analyzing 24 policy documents and conducting workshops to understand the situation better.
  • Despite some reforms since 1983, the current waste management system in Bangladesh is largely ineffective, suffering from poor implementation, lack of coordination, and inadequate monitoring efforts.
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Background: Over 57 million people in Bangladesh have been chronically exposed to arsenic-contaminated drinking water. They also face environmental exposure to elevated levels of cadmium (Cd), manganese (Mn), and lead (Pb), all of which have been previously observed in environmental and biological samples for this population. These metals have been linked to adverse neurocognitive outcomes in adults and children, though their effects on adolescents are not yet fully characterized.

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Two Dhaka, Bangladesh, landfills are explored to understand how management practices impact environmental quality and public health in the surrounding areas. A combination of research methods is used, such as geospatial buffer zone analysis, semi-structured observation checklist and qualitative interviews, to gain an understanding of the waste transportation, leachate percolation, and adverse health and environmental effects. A multi-ring buffer zone and ground truth method were applied through ArcMap for the spatial distribution of landfill-adjacent environmental features.

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Background: Associations of arsenic (As) with the sum of 5-mC and 5-hmC levels have been reported; however, As exposure-related differences of the separated 5-mC and 5-hmC markers have rarely been studied.

Methods: In this study, we evaluated the association of arsenic exposure biomarkers and 5-mC and 5-hmC in 30 healthy men (43-55 years) from the Aragon Workers Health Study (AWHS) (Spain) and 31 healthy men (31-50 years) from the Folic Acid and Creatinine Trial (FACT) (Bangladesh). We conducted 5-mC and 5-hmC profiling using Infinium MethylationEPIC arrays, on paired standard and modified (ox-BS in AWHS and TAB in FACT) bisulfite converted blood DNA samples.

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Background: Water-borne arsenic (As) exposure is a global health problem. Once ingested, inorganic As (iAs) is methylated to mono-methyl (MMA) and dimethyl (DMA) arsenicals via one-carbon metabolism (OCM). People with higher relative percentage of MMA (MMA%) in urine (inefficient As methylation), have been shown to have a higher risk of cardiovascular disease and several cancers but appear to have a lower risk of diabetes and obesity in populations from the US, Mexico, and Taiwan.

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Objective: To determine whether the odds of being a smoker differ based on social media use and social interactions among urban university students in Bangladesh.

Hypothesis: Social media use and social interactions influence the smoking behaviour of Bangladeshi university students, particularly in starting and maintaining cigarette smoking.

Design And Setting: A cross-sectional study using mixed methods on 600 student smokers and non-smokers recruited from two public and two private universities in Dhaka, Bangladesh, a lower middle-income country with limited resources.

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Article Synopsis
  • The study investigates how the baseline levels of one-carbon metabolism nutrients (like folate and choline) affect the response to folic acid (FA) and creatine supplementation in relation to arsenic methylation and elimination in urine.* -
  • Participants (N=622) received different doses of FA and creatine or a placebo for 12 weeks, with findings showing that lower betaine levels led to increased dimethylarsenic (DMAs) with FA supplementation, and lower choline levels were linked to decreased monomethylarsenic (MMAs) with creatine.* -
  • The results indicate that nutritional status regarding choline and betaine can influence the effectiveness of FA and creatine in improving arsenic methylation,
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  • Arsenic exposure affects over 100 million people worldwide and is linked to chronic diseases, potentially through epigenetic changes like DNA methylation.
  • Researchers examined the relationship between arsenic metabolism efficiency and DNA methylation, analyzing data from two studies involving 772 participants.
  • Results indicated a significant consistency between DNA methylation patterns and arsenic exposure, supporting the idea that arsenic may influence DNA methylation at specific sites, although further research with larger samples is needed for more definitive conclusions.
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Background: In human genetics research, it has become common practice for researchers to consider returning genetic information to participants who wish to receive it. Research participants in lower-resource settings may have barriers or competing interests that reduce the benefit or relevance of such information. Thus, the decision to return genetic information in these settings may involve special considerations of participants' interests and preferences.

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  • The study investigates the link between inorganic arsenic exposure during early life and blood pressure (BP) in adolescents, highlighting limited existing evidence on this issue.
  • It analyzed data from 726 adolescents (ages 14-17) by measuring both their current urinary arsenic levels and their mothers’ urinary arsenic levels during early childhood.
  • Results indicated that increased arsenic exposure is associated with higher systolic blood pressure in adolescents, particularly among those with higher body mass index (BMI), while no significant link was found for diastolic blood pressure.
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Background: It is well-known that methylation changes occur as humans age, however, understanding how age-related changes in DNA methylation vary by sex is lacking. In this study, we characterize the effect of age on DNA methylation in a sex-specific manner and determine if these effects vary by genomic context. We used the Illumina HumanMethylation 450 K array and DNA derived from whole blood for 400 adult participants (189 males and 211 females) from Bangladesh to identify age-associated CpG sites and regions and characterize the location of these age-associated sites with respect to CpG islands (vs.

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Background: Arsenic exposure affects [Formula: see text] people worldwide, including [Formula: see text] in Bangladesh. Arsenic exposure increases the risk of cancer and other chronic diseases, and one potential mechanism of arsenic toxicity is epigenetic dysregulation.

Objective: We assessed associations between arsenic exposure and genome-wide DNA methylation measured at baseline among 396 Bangladeshi adults participating in the Health Effects of Arsenic Longitudinal Study (HEALS) who were exposed by drinking naturally contaminated well water.

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  • Inorganic arsenic (iAs) is a known carcinogen affecting over 100 million people globally, especially in Bangladesh, where exposure is primarily through contaminated food and water.
  • A study of 1,660 Bangladeshi individuals revealed that a specific genetic variant (rs61735836) in the FTCD gene influences arsenic metabolism, leading to higher levels of urine iAs and MMA while lowering DMA, impacting toxicity levels.
  • The research also found that individuals with a low-efficiency variant of FTCD have an increased risk of arsenic-induced skin lesions, indicating a genetic component to susceptibility and suggesting the relevance of both FTCD and AS3MT genes in arsenic metabolism efficiency and toxicity.
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Background: Arsenic exposure through drinking water persists in many regions. Inorganic As (InAs) is methylated to monomethyl-arsenical species (MMAs) and dimethyl-arsenical species (DMAs), facilitating urinary excretion. Arsenic methylation is dependent on one-carbon metabolism, which is influenced by nutritional factors such as folate and creatine.

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Leukocyte telomere length (LTL) is a heritable trait with two potential sources of heritability (h): inherited variation in non-telomeric regions (e.g., SNPs that influence telomere maintenance) and variability in the lengths of telomeres in gametes that produce offspring zygotes (i.

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Background: Exposure to inorganic arsenic (As) from drinking water is associated with modest deficits in intellectual function in young children; it is unclear whether deficits occur during adolescence, when key brain functions are more fully developed.

Objectives: We sought to determine the degree to which As exposure is associated with adolescent intelligence, and the contributory roles of lead, cadmium, manganese and selenium.

Methods: We recruited a cross-section of 726 14-16 year olds (mean age = 14.

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Inherited genetic variation affects local gene expression and DNA methylation in humans. Most expression quantitative trait loci (cis-eQTLs) occur at the same genomic location as a methylation QTL (cis-meQTL), suggesting a common causal variant and shared mechanism. Using DNA and RNA from peripheral blood of Bangladeshi individuals, here we use co-localization methods to identify eQTL-meQTL pairs likely to share a causal variant.

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Identifying gene-environment interactions is a central challenge in the quest to understand susceptibility to complex, multi-factorial diseases. Developing an understanding of how inter-individual variability in inherited genetic variation alters the effects of environmental exposures will enhance our knowledge of disease mechanisms and improve our ability to predict disease and target interventions to high-risk sub-populations. Limited progress has been made identifying gene-environment interactions in the epidemiological setting using existing statistical approaches for genome-wide searches for interaction.

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  • Leucocyte telomere length (TL) is a biomarker linked to aging and disease risk, showing variability across different race/ethnic groups; previous studies mainly focused on European populations.
  • This study conducted a genome-wide association study (GWAS) on 5075 Bangladeshi adults, identifying both confirmed associations and a novel genetic link to TL.
  • The findings highlighted that while some loci are consistent with European studies, a new association was found that is more common in South Asian populations, emphasizing the need for diverse genetic research.
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  • Telomeres protect chromosome ends and shorten with age, which has been linked to higher mortality rates, but this link hasn't been studied much in non-European populations.
  • In a study involving over 27,000 participants from Bangladesh, researchers examined the relationship between telomere length (TL) and mortality using data from 744 mortality cases and 761 controls.
  • The findings indicated that shorter TL was associated with increased overall mortality and specific causes of death like chronic and circulatory diseases, marking the first evidence of this association in a non-European group.
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