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  1. Abdalla MMI
    World J Diabetes, 2021 Sep 15;12(9):1507-1517.
    PMID: 34630903 DOI: 10.4239/wjd.v12.i9.1507
    The escalating global burden of type 2 diabetes mellitus necessitates the implementation of strategies that are both more reliable and faster in order to improve the early identification of insulin resistance (IR) in high-risk groups, including overweight and obese individuals. The use of salivary biomarkers offers a promising alternative to serum collection because it is safer, more comfortable, and less painful to obtain saliva samples. As obesity is the foremost contributory factor in IR development, the adipocytokines such as leptin, adiponectin, resistin, and visfatin secreted from the adipose tissue have been studied as potential reliable biomarkers for IR. Measurement of salivary adipokines as predictors for IR has attracted widespread attention because of the strong correlation between their blood and salivary concentrations. One of the adipokines that is closely related to IR is resistin. However, there are conflicting findings on resistin's potential role as an etiological link between obesity and IR and the reliability of measuring salivary resistin as a biomarker for IR. Hence this study reviewed the available evidence on the potential use of salivary resistin as a biomarker for IR in order to attempt to gain a better understanding of the role of resistin in the development of IR in obese individuals.
  2. Abdalla MMI
    World J Clin Cases, 2022 Oct 26;10(30):10840-10851.
    PMID: 36338223 DOI: 10.12998/wjcc.v10.i30.10840
    The growing worldwide burden of insulin resistance (IR) emphasizes the importance of early identification for improved management. Obesity, particularly visceral obesity, has been a key contributing factor in the development of IR. The obesity-associated chronic inflammatory state contributes to the development of obesity-related comorbidities, including IR. Adipocytokines, which are released by adipose tissue, have been investigated as possible indicators of IR. Visfatin was one of the adipocytokines that attracted attention due to its insulin-mimetic activity. It is released from a variety of sources, including visceral fat and macrophages, and it influences glucose metabolism and increases inflammation. The relationship between visfatin and IR in obesity is debatable. As a result, the purpose of this review was to better understand the role of visfatin in glucose homeostasis and to review the literature on the association between visfatin levels and IR, cardiovascular diseases, and renal diseases in obesity.
  3. Abdalla MMI
    World J Gastroenterol, 2023 Jul 21;29(27):4271-4288.
    PMID: 37545641 DOI: 10.3748/wjg.v29.i27.4271
    Hepatocellular carcinoma (HCC), the predominant type of liver cancer, is a major contributor to cancer-related fatalities across the globe. Diabetes has been identified as a significant risk factor for HCC, with recent research indicating that the hormone resistin could be involved in the onset and advancement of HCC in diabetic individuals. Resistin is a hormone that is known to be involved in inflammation and insulin resistance. Patients with HCC have been observed to exhibit increased resistin levels, which could be correlated with more severe disease stages and unfavourable prognoses. Nevertheless, the exact processes through which resistin influences the development and progression of HCC in diabetic patients remain unclear. This article aims to examine the existing literature on the possible use of resistin levels as a biomarker for HCC development and monitoring. Furthermore, it reviews the possible pathways of HCC initiation due to elevated resistin and offers new perspectives on comprehending the fundamental mechanisms of HCC in diabetic patients. Gaining a better understanding of these processes may yield valuable insights into HCC's development and progression, as well as identify possible avenues for prevention and therapy.
  4. Abdalla MMI
    Ther Adv Endocrinol Metab, 2024;15:20420188231222371.
    PMID: 38250316 DOI: 10.1177/20420188231222371
    Adiponectin, an adipose-derived hormone, plays a pivotal role in glucose regulation and lipid metabolism, with a decrease in circulating adiponectin levels being linked to insulin resistance and prediabetes. This review examines the therapeutic potential of adiponectin in managing prediabetes, elucidating on multiple aspects including its role in glucose and lipid metabolism, influence on insulin sensitivity, and anti-inflammatory properties. Moreover, the paper highlights the latest strategies to augment adiponectin levels, such as gene therapy, pharmacological interventions, dietary modifications, and lifestyle changes. It also addresses the challenges encountered in translating preclinical findings into clinical practice, primarily related to drug delivery, safety, and efficacy. Lastly, the review proposes future directions, underlining the need for large-scale human trials, novel adiponectin analogs, and personalized treatment strategies to harness adiponectin's full therapeutic potential in preventing the transition from prediabetes to diabetes.
  5. Abdalla MMI, Choo SS
    Eur Endocrinol, 2020 Apr;16(1):49-53.
    PMID: 32595769 DOI: 10.17925/EE.2020.16.1.49
    OBJECTIVES: The study aimed to measure salivary ghrelin levels in healthy adult males and investigate their association with age, weight, height, total as well as regional body fat and muscle mass. The study also aimed to investigate the relative contribution of body mass index (BMI), waist circumference (WC), hip circumference (HC), waist-to-hip ratio (WHR) and waist-to-height ratio (WHtR) in predicting salivary ghrelin levels in the studied groups.

    METHODS: A sample of young adult males was divided into underweight, normal weight, overweight, and obese groups, according to their BMI. Standardised methods were used to measure height, WC and HC. Total body fat, visceral fat, subcutaneous fat, total and regional muscle mass were assessed by bioelectrical impedance technique utilising Karada scan. Salivary ghrelin concentrations were assessed using enzyme-linked immunosorbent assay.

    RESULTS: A total of 90 adult males were included in the analysis (underweight n=9, normal weight n=41, overweight n=22, and obese n=18). One-way ANOVA test revealed significant differences among the groups in all of the variables except height and salivary ghrelin levels. Multiple linear regression revealed a significant association between salivary ghrelin levels with total fat, subcutaneous fat, visceral fat and muscle mass in the obese group. The analysis also revealed that BMI, WC, HC, WHR and WHtR were reliable predictors for salivary ghrelin levels in the obese group but not in other groups.

    CONCLUSIONS: Anthropometric measures can be used as predictors for salivary ghrelin levels in healthy obese adults. However, they are poor predictors for salivary ghrelin levels in healthy lean, normal and overweight adults.

  6. Abdalla MMI, Mohanraj J, Somanath SD
    World J Diabetes, 2023 Jun 15;14(6):758-782.
    PMID: 37383591 DOI: 10.4239/wjd.v14.i6.758
    The global burden of diabetic foot ulcers (DFUs) is a significant public health concern, affecting millions of people worldwide. These wounds cause considerable suffering and have a high economic cost. Therefore, there is a need for effective strategies to prevent and treat DFUs. One promising therapeutic approach is the use of adiponectin, a hormone primarily produced and secreted by adipose tissue. Adiponectin has demonstrated anti-inflammatory and anti-atherogenic properties, and researchers have suggested its potential therapeutic applications in the treatment of DFUs. Studies have indicated that adiponectin can inhibit the production of pro-inflammatory cytokines, increase the production of vascular endothelial growth factor, a key mediator of angiogenesis, and inhibit the activation of the intrinsic apoptotic pathway. Additionally, adiponectin has been found to possess antioxidant properties and impact glucose metabolism, the immune system, extracellular matrix remodeling, and nerve function. The objective of this review is to summarize the current state of research on the potential role of adiponectin in the treatment of DFUs and to identify areas where further research is needed in order to fully understand the effects of adiponectin on DFUs and to establish its safety and efficacy as a treatment for DFUs in the clinical setting. This will provide a deeper understanding of the underlying mechanisms of DFUs that can aid in the development of new and more effective treatment strategies.
  7. Abdalla MMI, Abdelal MS, Soon SC
    Korean J Med Educ, 2019 Mar;31(1):11-18.
    PMID: 30852857 DOI: 10.3946/kjme.2019.114
    PURPOSE: This study aimed to assess the degree of acceptance of problem-based learning (PBL) among phase one medical students and its association with academic self-concept (ASC) and internal locus of control (ILOC).

    METHODS: A 5-point Likert scale valid and reliable questionnaire assessing the attitude towards PBL, ASC, and ILOC was given to phase one medical students at MAHSA University. Data were analysed using IBM SPSS ver. 22.0 (IBM Corp., Armonk, USA).

    RESULTS: Out of 255 participants, there were 84 males and 171 females, 175 Malaysians and 80 non-Malaysians. The results showed an overall acceptance of PBL with a mean of 3.7±0.07, ASC of 3.5±0.05 and ILOC of 2.9±0.05. Females showed a higher significant acceptance of PBL, ASC, and ILOC as compared with males. There was no difference between Malaysians and non-Malaysians in any of the variables measured. Simple regression analysis revealed a significant predictive effect of acceptance of PBL on ASC and ILOC (r=0.44 and r=0.88, respectively).

    CONCLUSION: The higher the acceptance of PBL among students, the higher is the ASC and ILOC. This reflects the importance of PBL as a teaching method as well as the importance of increasing the level of appreciation of PBL amongst students.

  8. Azzani M, Atroosh WM, Anbazhagan D, Kumarasamy V, Abdalla MMI
    Front Public Health, 2023;11:1266533.
    PMID: 38229668 DOI: 10.3389/fpubh.2023.1266533
    BACKGROUND: There is limited evidence of financial toxicity (FT) among cancer patients from countries of various income levels. Hence, this study aimed to determine the prevalence of objective and subjective FT and their measurements in relation to cancer treatment.

    METHODS: PubMed, Science Direct, Scopus, and CINAHL databases were searched to find studies that examined FT. There was no limit on the design or setting of the study. Random-effects meta-analysis was utilized to obtain the pooled prevalence of objective FT.

    RESULTS: Out of 244 identified studies during the initial screening, only 64 studies were included in this review. The catastrophic health expenditure (CHE) method was often used in the included studies to determine the objective FT. The pooled prevalence of CHE was 47% (95% CI: 24.0-70.0) in middle- and high-income countries, and the highest percentage was noted in low-income countries (74.4%). A total of 30 studies focused on subjective FT, of which 9 used the Comprehensive Score for FT (COST) tool and reported median scores ranging between 17.0 and 31.9.

    CONCLUSION: This study shows that cancer patients from various income-group countries experienced a significant financial burden during their treatment. It is imperative to conduct further studies on interventions and policies that can lower FT caused by cancer treatment.

  9. Abdalla MMI, Azzani M, Rajendren R, Hong TK, Balachandran Y, Hassan TR, et al.
    Am J Med Sci, 2021 Oct 01.
    PMID: 34606752 DOI: 10.1016/j.amjms.2021.07.015
    BACKGROUND: Traditional teaching methods via faculty lectures and text-based materials lack interactivity. Hence, this research aimed to compare the effectiveness of story-based audiovisual mnemonics and the conventional text-reading method on medical students' memory consolidation.

    METHODS: A single-center, systematically randomly sampled, single-blinded, controlled study was conducted among 80 first-year medical students. The students were randomly assigned to the text-reading (control) or story-based audiovisual mnemonics (intervention) group. After completing the learning session, the participants immediately took a test that consisted of ten multiple-choice questions, each of which had one correct single-response answer, and an oral recall test that consisted of ten keywords based on the given topics. The test was repeated at 1 week, 2 weeks, and 4 weeks post intervention. Descriptive and inferential statistics were utilized to assess the participants' responses. The mean score difference between the audiovisual mnemonics and control groups was determined by using a two-tailed unpaired t-test.

    RESULTS: The participants in the intervention group had statistically significant higher marks in the multiple-choice test as compared to the participants in the control group. The intervention group also spent a statistically significant shorter time to recall keywords in the oral recall test in comparison to the control group.

    CONCLUSION: The story-based audiovisual mnemonics method is more effective than the conventional text-reading method in promoting memory retention among medical students.

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