Archna Singh

Dr. Archna Singh


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 March 2015 in Reproductive Health
Verified
Journal Article
Open access
PDF file
SGSuparna Ghosh-Jerath
Suparna Ghosh-Jerath
NDNiveditha Devasenapathy
Niveditha Devasenapathy
ASArchna Singh
Archna Singh
ASAnuraj Shankar
Anuraj Shankar
SZSanjay Zodpey
Sanjay Zodpey
Antenatal Care (ANC) is one of the crucial factors in ensuring healthy outcomes in women and newborns. Nutrition education and counselling is an integral part of ANC that influences maternal and child health outcomes. A cross sectional study was conducted in Pregnant Women (PW) and mothers who had delivered in the past three months; Recently Delivered Women (RDW) in urban slums of North-east district of Delhi, India, to explore ANC utilization, dietary practices and nutritional outcomes. A household survey was conducted in three urban slums to identify PW and RDW. Socio-economic and demographic profile, various components of ANC received including nutrition counselling, dietary intake and nutritional outcomes based on anthropometric indices and anaemia status were assessed. Socio-demographic characteristics, nutrient intake and nutritional status were compared between those who availed ANC versus those who did not using logistic regression. Descriptive summary for services and counselling received; dietary and nutrient intake during ANC were presented. Almost 80% (274 out of 344) women received some form of ANC but the package was inadequate. Determinants for non-utilization of ANC were poverty, literacy, migration, duration of stay in the locality and high parity. Counselling on nutrition was reported by a fourth of the population. Nutrient intake showed suboptimal consumption of protein and micronutrients like iron, calcium, vitamin A, vitamin C, thiamine, riboflavin niacin, zinc and vitamin B12 by more than half of women. A high prevalence of anaemia among PW (85%) and RDW (97.1%) was observed. There was no difference in micronutrient intake and anaemia prevalence among women who received ANC versus who did not. Pregnant women living in urban poor settlements have poor nutritional status. This may be improved by strengthening the nutrition counselling component of ANC which was inadequate in the ANC package received. Empowering community based health workers in providing effective nutrition counselling should be explored given the overburdened public health system.

1 May 2021 in Mitochondrion
Verified
Journal Article
Closed access
SCShilpi Chaudhary
Shilpi Chaudhary
SGShuvadeep Ganguly
Shuvadeep Ganguly
JPJayanth Kumar Palanichamy
Jayanth Kumar Palanichamy
ASArchna Singh
Archna Singh
RBRadhika Bakhshi
Radhika Bakhshi
SBSameer Bakhshi
Sameer Bakhshi

1 February 2019 in Diabetes, Metabolic Syndrome and Obesity
Verified
Journal Article
Open access
PDF file
VVVinnyfred Vincent
Vinnyfred Vincent
HTHimani Thakkar
Himani Thakkar
SASandeep Aggarwal
Sandeep Aggarwal
AMAsit Ranjan Mridha
Asit Ranjan Mridha
LRLakshmy Ramakrishnan
Lakshmy Ramakrishnan
ASArchna Singh
Archna Singh
Purpose: Adipose tissue dysfunction is at the center of metabolic dysfunctions associated with obesity. Through studies in isolated adipocytes and mouse models, ATP-binding cassette transporter A1 (ABCA1) expression in the adipose tissue has been shown to regulate high-density lipoprotein (HDL) cholesterol levels in the circulation and insulin sensitivity at both adipose tissue and whole-body levels. We aimed to explore the possible link between ABCA1 expression in the adipose tissue and metabolic derangements associated with obesity in humans. Patients and methods: This exploratory study among individuals who were lean (body mass index [BMI]: 22.3±0.34 kg/m2, n=28) and obese (BMI: 44.48±5.3 kg/m2, n=34) compared the expression of ABCA1, adiponectin and GLUT4 (SLC2A4) in visceral and subcutaneous adipose tissue using quantitative real-time PCR and immunohistochemistry. Homeostatic model assessment for insulin resistance (HOMA-IR) and adipose tissue insulin resistance (adipo-IR) were used as insulin resistance markers. Results: Visceral adipose tissue from individuals who were obese had significantly lower ABCA1 (P=0.04 for mRNA and protein) and adiponectin (P=0.001 for mRNA) expression compared to that from lean individuals. Subcutaneous adipose tissue did not show any significant difference in the expression. When individuals were divided into insulin-sensitive (IS) and insulin-resistant (IR) groups based on HOMA-IR, IR individuals had lower ABCA1 (P=0.0001 for mRNA and P=0.009 for protein) expression compared to IS individuals in visceral adipose tissue, but not in subcutaneous adipose tissue. The difference was significant after adjusting for age, gender and BMI. ABCA1 mRNA expression in visceral adipose tissue correlated negatively with both HOMA-IR (r=–0.44, P=0.0003) and adipo-IR (r=–0.35, P=0.005) after adjusting for age, gender and BMI. ABCA1 expression in either visceral or subcutaneous adipose tissue did not have any significant correlation with HDL cholesterol levels or mean adipocyte area. Conclusion: Obesity and insulin resistance are associated with lower expression of ABCA1 in visceral adipose tissue in humans.

26 April 2021 in Journal of Lipids
Verified
Journal Article
Open access
PDF file
HTHimani Thakkar
Himani Thakkar
VVVinnyfred Vincent
Vinnyfred Vincent
ASAtanu Sen
Atanu Sen
ASArchna Singh
Archna Singh
ARAMBUJ ROY
AMBUJ ROY
High-density lipoprotein (HDL) comprises a heterogeneous group of particles differing in size, density, and composition. HDL cholesterol (HDL-C) levels have long been suggested to indicate cardiovascular risk, inferred from multiple epidemiological studies. The failure of HDL-C targeted interventions and genetic studies has raised doubts on the atheroprotective role of HDL-C. The current consensus is that HDL-C is neither a biomarker nor a causative agent of cardiovascular disorders. With better understanding of the complex nature of HDL which comprises a large number of proteins and lipids with unique functions, recent focus has shifted from HDL quantity to HDL quality in terms of atheroprotective functions. The current research is focused on developing laboratory assays to assess HDL functions for cardiovascular risk prediction. Also, HDL mimetics designed based on the key determinants of HDL functions are being investigated to modify cardiovascular risk. Improving HDL functions by altering its composition is the key area of future research in HDL biology to reduce cardiovascular risk.

15 July 2019 in BMC Public Health
Verified
Journal Article
Open access
PDF file
SGSuparna Ghosh-Jerath
Suparna Ghosh-Jerath
SDShauna Downs
Shauna Downs
ASArchna Singh
Archna Singh
SPSantanu Paramanik
Santanu Paramanik
GGGail Goldberg
Gail Goldberg
JFJessica Fanzo
Jessica Fanzo
Indigenous communities retain knowledge of the land and food resources rooted in historical continuity within their region of residence. Food systems research can be leveraged to identify strategies to encourage sustainable use of complex multi-species agroforestry systems by indigenous communities contributing to nutritional needs while simultaneously preserving the ecosystems and their benefits to society. Till date, the analyses of food systems have predominantly focused on high income countries often overlooking the alternatives (dietary and production) that would be most relevant to low and middle income countries (LMIC). Thus, innovative methodological approaches are needed to comprehensively characterize diverse food systems in LMICs with special reference to indigenous communities. This protocol paper describes a food systems approach that will be employed to understand diverse and dynamic food systems of vulnerable tribal communities of Jharkhand, India and leverage their agroforestry systems to improve dietary diversity, nutrition status and address food security. Four tribal groups namely Santhal, Ho, Munda and Sauria Paharia of Godda, West Singhbhum and Khunti districts of Jharkhand would be studied. This will be an exploratory cross-sectional study design, along with a longitudinal component to capture seasonality in dietary intake and agricultural diversity. A mixed methods approach will be used based on a conceptual framework on drivers of food systems, food supply chain, food environment (both wild & cultivated, and market food environments), as well as consumer behaviour and maternal and child health outcomes in tribal communities. The quantitative surveys will be conducted on socio-economic, demographic profile of households, their availability of, access to and utilization of food environment and nutritional status of reproductive age group women and children under 5 years. Qualitative enquiries will examine barriers and facilitators to increase sustainable production, procurement and consumption of indigenous foods. The final outcome would be development of interventions to promote indigenous food consumption. By utilizing a combination of value chain analysis and ‘Optifoods linear programming software’ that will use above information on indigenous community, dietary intake, nutritional status and food environment, evidence based interventions promoting indigenous food systems aimed at addressing food and nutritional security of tribal communities will be developed.

15 April 2020 in Lipids in Health and Disease
Verified
Journal Article
Open access
PDF file
HTHimani Thakkar
Himani Thakkar
VVVinnyfred Vincent
Vinnyfred Vincent
ARAMBUJ ROY
AMBUJ ROY
SSSandeep Singh
Sandeep Singh
LRLakshmy Ramakrishnan
Lakshmy Ramakrishnan
ASArchna Singh
Archna Singh
Background: Recent studies emphasize the importance of HDL function over HDL cholesterol measurement, as an important risk for cardiovascular diseases (CVD). We compared the HDL function of patients with acute coronary syndrome (ACS) and healthy controls. Methods: We measured cholesterol efflux capacity of HDL using THP-1 macrophages labelled with fluorescently tagged (BODIPY) cholesterol. PON1 activities toward paraoxon and phenyl acetate were assessed by spectrophotometric methods. Results: We recruited 150 ACS patients and 110 controls. The HDL function of all patients during acute phase and at six month follow-up was measured. The mean age of the patients and controls was 51.7 and 43.6 years respectively. The mean HDL cholesterol/apolipoprotein A-I levels (ratio) of patients during acute phase, follow-up and of controls were 40.2 mg/dl/ 112.5 mg/dl (ratio = 0.36), 38.3 mg/dl/ 127.2 mg/dl (ratio = 0.30) and 45.4 mg/dl/ 142.1 mg/dl (ratio = 0.32) respectively. The cholesterol efflux capacity (CEC) of HDL was positively correlated with apolipoprotein A-I levels during acute phase (r = 0.19, p = 0.019), follow-up (r = 0.26, p = 0.007) and of controls (r = 0.3, p = 0.0012) but not with HDL-C levels (acute phase: r = 0.07, p = 0.47; follow-up: r = 0.1, p = 0.2; control: r = 0.02, p = 0.82). Higher levels of cholesterol efflux capacity, PON1 activity and apolipoprotein A-I were associated with lower odds of development of ACS. We also observed that low CEC is associated with higher odds of having ACS if PON1 activity of HDL is also low and vice versa. Conclusion: ACS is associated with reduced HDL functions which improves at follow-up. The predicted probability of ACS depends upon individual HDL functions and the interactions between them.