Dietary knowledge assessment among the patients with type 2 diabetes in Madinah: A cross-sectional study

Background

There is a huge burden of nutrition-related non-communicable diseases, and diabetes is one of the leading chronic nutrition-related diseases affecting more than 500 million people globally. Collecting information regarding the awareness of dietary and nutrition knowledge among diabetic patients is the first step to developing a disease prevention program. Thus, this study primarily aims at assessing the dietary awareness of diabetes patients attending the diabetic centre in Madinah governorate, Saudi Arabia.

Methods

The study was started in November 2020 and ended in October 2021. The study participants (315) were type 2 diabetes mellitus (T2DM) patients attending a diabetic centre in Madinah, Saudi Arabia. A self-prepared dietary knowledge questionnaire (DKQ) was used in this research. The variables include balanced diet, food type, food choice, carbohydrate, protein, and fat. Knowledge score was, and the total score was levelled/categorized into 'good', 'average', and 'poor'. Data were analysed by SPSS v.26.

Results

The study results identified the current knowledge of T2DM patients about different dietary items. The knowledge score of 62.2% of participants showed an average level of dietary knowledge, which is statistically significant. When we separately evaluated their understanding of different dietary components, we found that T2DM patients had poor knowledge of carbohydrates (30.15%), fat, food choices (47.7%), and type (34.6%). However, they had acceptable knowledge of proteins (56.5%).

Conclusion

Our participants exhibited acceptable knowledge about proteins but poorer knowledge of other food groups. A healthy, well-balanced diet is essential for excellent glycaemic control. Educating and arranging a health education program regarding dietary knowledge is recommended, specially designed for diabetic patients so that patients can opt for a healthier lifestyle.

The Effect of Weaning Practices on the Nutritional and Health Status of Saudi Preschool Children

Background Weaning is a complex procedure that gradually introduces complementary foods to the baby's diet. Solid food should be started between the ages of 6 and 12 months. Weaning is a challenging and crucial stage in an infant's development. Extreme caution should be used during weaning an infant because delaying it can cause issues like sluggish growth, difficulties feeding, malnutrition, and iron deficiency. Objective The current study aims to determine the impact of delayed or early weaning practices on the nutritional status of preschool children in Saudi Arabia. Data was gathered about the time of complementary food introduction, preferred foods in the initial stages, and a child's health compared to those practices.  Methodology By convenient sampling, a cross-sectional study was conducted to gather data from 385 parents of Saudi children at preschool age. Questionnaires were shared online. Data were recorded and analyzed on IBM Corp. Released 2012. IBM SPSS Statistics for Windows, Version 21.0. Armonk, NY: IBM Corp. Descriptive analysis and multivariate ANOVA (MANOVA) tests were performed. Results Only 6.23% of the infants were introduced to complimentary food at optimal age (6 to 12 months), whereas 85% were found to have delayed weaning. As per the BMI, 74.4% of preschool children were severely underweight, 53.6% of infants consumed pureed vegetables early during weaning, and 64% of infants were introduced to eggs and cheese within the first year of life. The timing, pattern, and food items of weaning had a significant (p<0.05) impact on general physical health, as 48.8% of children had pale skin, 46.9% felt tired, 36.5% had swollen joints, and 42% complained of itching and an upset stomach. Conclusion This study couldn't define the direction of significance. Further studies can be done on a larger scale where biochemical tests, and screening can be done on children to find if any significant health problem is prevailing, and the direction of association can be defined.

Osteogenic Response of Human Mesenchymal Stem Cells Analysed Using Combined Intracellular and Extracellular Metabolomic Monitoring

BACKGROUND/AIMS

The skeleton is a metabolically active organ undergoing continuous remodelling initiated by mesenchymal progenitors present in bone and bone marrow. Under certain pathological conditions this remodelling balance shifts towards increased resorption resulting in weaker bone microarchitecture, and there is consequently a therapeutic need to identify pathways that could inversely enhance bone formation from stem cells. Metabolomics approaches recently applied to stem cell characterisation could help identify new biochemical markers involved in osteogenic differentiation.

METHODS

Combined intra- and extracellular metabolite profiling was performed by liquid chromatography-mass spectrometry (LC-MS) on human mesenchymal stem cells (MSCs) undergoing osteogenic differentiation in vitro. Using a combination of univariate and multivariate analyses, changes in metabolite and nutrient concentration were monitored in cultures under osteogenic treatment over 10 days.

RESULTS

A subset of differentially detected compounds was identified in differentiating cells, suggesting a direct link to metabolic processes involved in osteogenic response.

CONCLUSION

These results highlight new metabolite candidates as potential biomarkers to monitor stem cell differentiation towards the bone lineage.

Targeting Glutamine Synthesis Inhibits Stem Cell Adipogenesis in Vitro

BACKGROUND/AIMS

Glutamine is the most abundant amino acid in the body and has a metabolic role as a precursor for protein, amino sugar and nucleotide synthesis. After glucose, glutamine is the main source of energy in cells and has recently been shown to be an important carbon source for de novo lipogenesis. Glutamine is synthesized by the enzyme glutamine synthetase, a mitochondrial enzyme that is active during adipocyte differentiation suggesting a regulatory role in this process. The aim of our study was therefore to investigate whether glutamine status impacts on the differentiation of adipocytes and lipid droplet accumulation.

METHODS

Mouse mesenchymal stem cells (MSCs) were submitted to glutamine deprivation (i.e. glutamine-free adipogenic medium in conjunction with irreversible glutamine synthetase inhibitor, methionine sulfoximine - MSO) during differentiation and their response was compared with MSCs differentiated in glutamine-supplemented medium (5, 10 and 20 mM). Differentiated MSCs were assessed for lipid content using Oil Red O (ORO) staining and gene expression was analysed by qPCR. Intracellular glutamine levels were determined using a colorimetric assay, while extracellular glutamine was measured using liquid chromatography-mass spectrometry (LC-MS).

RESULTS

Glutamine deprivation largely abolished adipogenic differentiation and lipid droplet formation. This was accompanied with a reduction in intracellular glutamine concentration, and downregulation of gene expression for classical adipogenic markers including PPARγ. Furthermore, glutamine restriction suppressed isocitrate dehydrogenase 1 (IDH1) gene expression, an enzyme which produces citrate for lipid synthesis. In contrast, glutamine supplementation promoted adipogenic differentiation in a dose-dependent manner.

CONCLUSION

These results suggest that the glutamine pathway may have a previously over-looked role in adipogenesis. The underlying mechanism involved the glutamine-IDH1 pathway and could represent a potential therapeutic strategy to treat excessive lipid accumulation and thus obesity.

Non-destructive characterisation of mesenchymal stem cell differentiation using LC-MS-based metabolite footprinting

Bone regeneration is a complex biological process where major cellular changes take place to support the osteogenic differentiation of mesenchymal bone progenitors. To characterise these biological changes and better understand the pathways regulating the formation of mature bone cells, the metabolic profile of mesenchymal stem cell (MSC) differentiation in vitro has been assessed non-invasively during osteogenic (OS) treatment using a footprinting technique. Liquid chromatography (LC)-mass spectrometry (MS)-based metabolite profiling of the culture medium was carried out in parallel to mineral deposition and alkaline phosphatase activity which are two hallmarks of osteogenesis in vitro. Metabolic profiles of spent culture media with a combination of univariate and multivariate analyses investigated concentration changes of extracellular metabolites and nutrients linked to the presence of MSCs in culture media. This non-invasive LC-MS-based analytical approach revealed significant metabolic changes between the media from control and OS-treated cells showing distinct effects of MSC differentiation on the environmental footprint of the cells in different conditions (control vs. OS treatment). A subset of compounds was directly linked to the osteogenic time-course of differentiation, and represent interesting metabolite candidates as non-invasive biomarkers for characterising the differentiation of MSCs in a culture medium.