Browse publications by year: 2024

  1. Wong WK, Abu Bakar Sajak A, Chua HS
    Arthroplasty, 2024 Dec 04;6(1):60.
    PMID: 39627902 DOI: 10.1186/s42836-024-00281-z
    BACKGROUND: Only 80% of patients are satisfied with their outcomes post-TKA. Mounting attention has been paid to constitutional limb alignment and individualized alignment strategies in recent years. MacDessi et al. proposed the CPAK classification, which takes into account the patients' arithmetic hip-knee-ankle axis (aHKA) and joint line obliquity (JLO). In this study, we aimed to establish local demographic data, compare them with published data, and assess their correlations with modifiable variables.

    METHODS: A total of 500 end-stage osteoarthritic knees subjected to TKA were radiologically analyzed. The lateral distal femoral angle (LDFA) and medial proximal tibial angle (MPTA) were calculated from long limb radiographs before the aHKA and JLO were derived and a CPAK phenotype was assigned. Demographic data were harvested and analyzed for possible correlations.

    RESULTS: There were 160 males (32%) and 340 females (68%), with a mean age of 66.42 years (range, 47-88). The mean MPTA was 85.8° (± 3.0)°, and the mean LDFA was 87.6° (± 2.4)°. The average aHKA was a varus of 1.8° (± 4.2)°, and the average JLO was 173.4° (± 3.45)°. The most common CPAK phenotype was Type 1 (43.4%). The Intraclass Correlation Coefficient demonstrated excellent reliability (> 0.9). No correlation existed between CPAK phenotypes and age, height, weight, or body mass index (BMI), but CPAK phenotype was significantly correlated with gender.

    CONCLUSION: An urban Malaysian population with osteoarthritic knees was found to be constitutionally varus, with the most common phenotype being varus aHKA with an apex-distal JLO. Constitutional alignment is not influenced by factors such as age, height, weight, or BMI.

    LEVEL OF EVIDENCE: Retrospective Observational Study-III.

  2. Pandurangan V, Sarojam SP, Narayanan P, Velayutham M
    Network, 2024 Dec 03.
    PMID: 39628058 DOI: 10.1080/0954898X.2024.2428705
    Skin melanin lesions are typically identified as tiny patches on the skin, which are impacted by melanocyte cell overgrowth. The number of people with skin cancer is increasing worldwide. Accurate and timely skin cancer identification is critical to reduce the mortality rates. An incorrect diagnosis can be fatal to the patient. To tackle these issues, this article proposes the Recurrent Prototypical Object Segmentation Network (RPO-SegNet) for the segmentation of skin lesions and a hybrid Deep Learning (DL) - based skin cancer classification. The RPO-SegNet is formed by integrating the Recurrent Prototypical Networks (RP-Net), and Object Segmentation Networks (O-SegNet). At first, the input image is taken from a database and forwarded to image pre-processing. Then, the segmentation of skin lesions is accomplished using the proposed RPO-SegNet. After the segmentation, feature extraction is accomplished. Finally, skin cancer classification and detection are accomplished by employing the Fuzzy-based Shepard Convolutional Maxout Network (FSCMN) by combining the Deep Maxout Network (DMN), and Shepard Convolutional Neural Network (ShCNN). The established RPO-SegNet+FSCMN attained improved accuracy, True Negative Rate (TNR), True Positive Rate (TPR), dice coefficient, Jaccard coefficient, and segmentation analysis of 91.985%, 92.735%, 93.485%, 90.902%, 90.164%, and 91.734%.
  3. Wahyuningsih S, Widati S, Praveena SM, Azkiya MW
    Front Reprod Health, 2024;6:1444111.
    PMID: 39628795 DOI: 10.3389/frph.2024.1444111
    INTRODUCTION: Sexual and reproductive health (SRH) among adolescents is a critical aspect of global health. Rural adolescents often encounter significant barriers to reproductive health awareness, elevating their risks for unintended pregnancies, sexually transmitted infections (STIs), and other reproductive health issues. This systematic review seeks to identify and analyze the barriers hindering reproductive health awareness among rural adolescents.

    METHODS: This review followed PRISMA guidelines. Literature searches were conducted in PubMed, ScienceDirect, Google Scholar, and Taylor & Francis, focusing on studies published from 2019 to 2024. Keywords included "Adolescent," "Rural," "Reproductive Health," "Awareness," and "Barriers." Studies were screened based on eligibility criteria, and data were extracted and analyzed to identify key barriers at the individual, interpersonal, social/community, and health services levels.

    RESULTS: Out of 669 records, 20 studies met the inclusion criteria. Identified barriers at the individual level included lack of knowledge, myths, misconceptions, and feelings of shame and fear. Interpersonal barriers were related to poor communication between parents and adolescents and misinformation from peers. Social and community barriers encompassed rigid social norms, stigma, and discrimination. Health services barriers included limited access and negative experiences with reproductive health services.

    DISCUSSION: Rural adolescents face complex barriers to reproductive health awareness driven by factors at the individual, interpersonal, social, and health services levels. Comprehensive interventions, such as educational campaigns, training for healthcare providers, and improved access via mobile or online platforms, are essential to enhance reproductive health awareness and outcomes.

    SYSTEMATIC REVIEW REGISTRATION: https://www.crd.york.ac.uk/, PROSPERO (CRD42024554439).

  4. Mahesh S, van der Werf E, Mallappa M, Vithoulkas G, Lai NM
    J Med Life, 2024 Sep;17(9):830-839.
    PMID: 39628966 DOI: 10.25122/jml-2024-0081
    It is unclear whether fever suppression in the elderly provides long-term benefits or poses risks due to their distinct immune profiles and body temperature regulation compared to younger individuals. This study aimed to assess the long-term health effects of antipyretic treatment during infections in the elderly. A systematic review was conducted, including studies that compared antipyretic treatment with other drugs, therapies, placebo, or no treatment. PubMed, Embase and Cochrane CENTRAL databases were searched. Primary and secondary outcomes were the onset or worsening of chronic inflammatory diseases, fever reduction, length of hospital stay, patient satisfaction, mortality, laboratory indicators of morbidity, and progression to complications, respectively. Out of 11,481 studies screened, 17 were included (two randomized controlled trials [RCTs], seven observational studies, one case series, and seven case reports). None investigated the primary outcome or patient-reported outcomes. The risk of bias in the included studies ranged from unclear to high. Due to the heterogeneity of the studies, a narrative synthesis was conducted, as meta-analysis was not feasible. Antipyretics showed a significant reduction of fever in RCTs. Five studies reported a significant drop in blood pressure, and one showed significant mortality from antipyretics. Morbidity indicators and length of stay were available only in the studies that reported adverse events. The certainty of evidence, assessed using GRADE, was low to very low for all outcomes. Evidence regarding the long-term benefit or harm from fever suppression with antipyretics during infections in the elderly is insufficient.
    MeSH terms: Aged; Aged, 80 and over; Aging; Humans
  5. Mudgil P, Gan CY, Yap PG, Redha AA, Alsaadi RHS, Mohteshamuddin K, et al.
    J Dairy Sci, 2024 Dec;107(12):10153-10173.
    PMID: 39122154 DOI: 10.3168/jds.2024-25108
    Bioactive peptides produced via enzymatic hydrolysis have been widely investigated for their dipeptidyl peptidase-IV (DPP-IV) inhibitory properties. However, the deficit of studies on fermentation as a means to produce DPP-IV inhibitory peptides prompted us to draw a comparative study on DPP-IV inhibitory peptides generated from cow, camel, goat, and sheep milk using probiotic fermentation. Further, peptide identification, in silico molecular interactions with DPP-IV, and ensemble docking were performed. Results suggested that goat milk consistently exhibited greater degrees of hydrolysis than other milk types. Further, Pediococcus pentosaceus (PP-957) emerged as a potent probiotic, with significantly lower median inhibitory concentration values of DPP-IV, of 0.17, 0.12, and 0.25 µg/mL protein equivalents in fermented cow, camel, and goat milk, respectively. Overall, peptides (RPPPPVAM, CHNLDELKDTR, and VLSLSQPK) exhibited strong binding affinity, with binding energies of -9.31, -9.18, and -8.9 kcal/mol, respectively, suggesting their potential role as DPP-IV inhibitors. Overall, this study offers valuable information toward antidiabetic benefits of fermented milk products via inhibition of DPP-IV.
    MeSH terms: Animals; Cattle; Fermentation*; Goats; Peptides*; Probiotics*
  6. Alyafeai E, Qaed E, Al-Mashriqi HS, Almaamari A, Almansory AH, Futini FA, et al.
    Mutat Res, 2024;829:111883.
    PMID: 39265237 DOI: 10.1016/j.mrfmmm.2024.111883
    The integrity of the genetic material in human cells is continuously challenged by environmental agents and endogenous stresses. Among these, environmental carcinogens are pivotal in initiating complex DNA lesions that can lead to malignant transformations if not properly repaired. This review synthesizes current knowledge on the molecular dynamics of DNA repair mechanisms and their interplay with various environmental carcinogens, providing a comprehensive overview of how these interactions contribute to cancer initiation and progression. We examine key DNA repair pathways including base excision repair, nucleotide excision repair, and double-strand break repair and their regulatory networks, highlighting how defects in these pathways can exacerbate carcinogen-induced damage. Further, we discuss how understanding these molecular interactions offers novel insights into potential therapeutic strategies. This includes leveraging synthetic lethality concepts and designing targeted therapies that exploit specific DNA repair vulnerabilities in cancer cells. By integrating recent advances in molecular biology, genetics, and oncology, this review aims to illuminate the complex landscape of DNA repair and carcinogen-induced carcinogenesis, setting the stage for future research and therapeutic innovations.
    MeSH terms: Animals; DNA Damage; DNA Repair*; Humans; Disease Progression; DNA Breaks, Double-Stranded; Molecular Dynamics Simulation; Carcinogenesis/chemically induced; Carcinogenesis/genetics
  7. Soon B, Jaafar AS, A Bakar A, Narayanan V
    World Neurosurg, 2024 Nov;191:e607-e621.
    PMID: 39265943 DOI: 10.1016/j.wneu.2024.09.012
    OBJECTIVE: This study aimed to assess the diagnostic accuracy of a novel marker, the combined lactate glucose ratio (CLGR), in identifying cerebrospinal fluid (CSF) bacterial infection (CBI) in neurosurgical patients. Additionally, it seeks to establish cutoff values for CLGR and evaluate the reliability of measurement using blood gas analyzer (BGA).

    METHODS: CSF samples were collected from 2 neurosurgical centers in Kuala Lumpur, Malaysia, between January 2022 and October 2023. Conventional markers and CLGR were quantified using standard laboratory methods, with BGA utilized for measurement when feasible. Samples were categorized into confirmed CBI-positive (CBI+) and CBI-negative (CBI-) groups. Marker performance was compared, and receiver operating characteristic analysis conducted. Pearson correlation assessed the agreement between BGA and laboratory measurements.

    RESULTS: Among the 130 CSF samples, 11 were CBI+. Both cerebrospinal fluid lactate (cLac) and CLGR were significantly elevated in the CBI + group (P < 0.001). The area under the curve for cLac and CLGR was 0.990 and 0.994, respectively. Using a cutoff of 6.0 mmol/L, cLac demonstrated sensitivity of 100%, specificity of 93.3%, positive predictive value of 57.9%, negative predictive value of 100%, and diagnostic accuracy of 93.9%. CLGR ≥20.0 showed even higher accuracy: 100.0% sensitivity, 98.6% specificity, 84.6% positive predictive value, 100% negative predictive value, and overall accuracy of 98.5%. Both markers maintained excellent performance in blood-stained CSF. BGA measurements correlated well with laboratory results (r = 0.980 and 0.999, respectively, P < 0.001).

    CONCLUSIONS: CLac levels ≥6.0 mmol/L and CLGR ≥20.0 accurately identified CBI in neurosurgical patients, with CLGR exhibiting superior efficacy. The potential for instant BGA measurement suggests promise for point-of-care testing.

    MeSH terms: Adult; Aged; Blood Gas Analysis/methods; Female; Humans; Male; Middle Aged; Sensitivity and Specificity; Reproducibility of Results; Neurosurgical Procedures*; Central Nervous System Bacterial Infections/cerebrospinal fluid; Central Nervous System Bacterial Infections/diagnosis; Young Adult
  8. Syed Abd Halim SA, Yusoff MSB, Yaman MN, Roslan NS, Tengku Muda TFM, Ramli RR, et al.
    Anat Sci Educ, 2024 Dec;17(9):1659-1667.
    PMID: 39294898 DOI: 10.1002/ase.2515
    A profound grasp of anatomy is indispensable for shaping competent and safe medical practitioners. This knowledge acquisition is pivotal in the early stages of medical education and remains crucial throughout clinical training. However, the evolving landscape of medical education has ushered in changes to the anatomy curriculum, marked by a reduction in contact hours and a streamlined content structure to accommodate novel subjects and teaching methodologies. This transformation has precipitated a quandary in defining the essential scope and depth of anatomical knowledge to be imparted. Traditionally, surgeons assumed the role of anatomy instructors until Flexner's recommendations catalyzed the integration of trained anatomists. Nevertheless, the varied backgrounds of anatomists and the heterogeneity in anatomy curricula across institutions have introduced potential disparities in the quality of graduates. Addressing these challenges mandates the identification of key anatomy competencies tailored for undergraduate medical students. The imperative lies in ensuring that these competencies span cognitive, psychomotor, and affective domains, offering not only comprehensiveness but also direct applicability to clinical practice. Hence, this viewpoint highlights the necessity of adopting a systematic approach that includes gathering input from various stakeholders in developing and implementing a universal anatomy core competency framework, ensuring graduates are equipped for the multifaceted demands of clinical practice. Overall, the manuscript provides a comprehensive overview of the challenges and opportunities in anatomy education, with a clear call to action for a transformative approach to meet the evolving needs of medical practice.
    MeSH terms: Clinical Competence*; Curriculum*; Educational Measurement/methods; Humans; Students, Medical/psychology; Students, Medical/statistics & numerical data
  9. Nashreen CM, Hamdan M, Hong J, Kamarudin M, Saaid R, Tan PC
    Acta Obstet Gynecol Scand, 2024 Dec;103(12):2475-2484.
    PMID: 39356052 DOI: 10.1111/aogs.14975
    INTRODUCTION: Our objective was to compare the performance of the first vaginal examination at 8 vs 4 h after amniotomy following Foley ripening in nulliparous labor induction.

    MATERIAL AND METHODS: A randomized controlled trial was conducted from June 2021 to January 2022. 210 nulliparas at term for labor induction were randomized: 105 each to first vaginal examination at 8 or 4 h after Foley balloon ripening and amniotomy. Titrated oxytocin infusion was routinely commenced after amniotomy to expedite labor. Primary outcomes were the amniotomy-to-delivery interval (non-inferiority hypothesis) and maternal satisfaction with their allocated labor care (superiority hypothesis) within 24 h after delivery. Analyses performed using t-test, Mann-Whitney U test, and Chi-squared test as appropriate.

    RESULTS: The amniotomy-to-delivery interval was mean ± standard deviation 8.7 ± 3.4 vs 8.4 ± 3.7, mean difference 0.4 (97.5% CI: -0.7 to 1.5) hours, p = 0.442 within the pre-specified 2-hour non-inferiority margin, and maternal satisfaction score with allocated labor care was median [interquartile range] 8[7.5-10] vs 8[7.0-10], p = 0.248 for 8 vs 4 h arms, respectively. The amniotomy to first vaginal examination intervals was 5.9 ± 2.3 vs 3.6 ± 1.0 h, p 

    MeSH terms: Adult; Female; Humans; Parity*; Pregnancy; Time Factors; Patient Satisfaction; Cervical Ripening*
  10. Yap PG, Gan CY
    Int J Biol Macromol, 2024 Dec;282(Pt 3):136927.
    PMID: 39471933 DOI: 10.1016/j.ijbiomac.2024.136927
    Ramie leaf polysaccharides (RLP) were extracted using deep eutectic solvent (DES) and microwave. The extraction conditions, i.e., buffer-to-substrate (B:S) ratio (10:1-30:1 w/v), microwave power (90-270 W) and extraction duration (2-4 min) were optimized using response surface methodology. Based on the optimized model, 21.1 mL/g B:S ratio, 263 W microwave power and 2.8 min extraction time had successfully produced RLP with 16.67 ± 1.10 % (w/w) yield and 80.84 ± 1.16 % 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. The 23.4 ± 0.389 kDa RLP was a neutral polysaccharide with low carbohydrate, protein, and phenolic contents. The low galacturonic acid content (0.89 ± 0.05 mg/g) suggested RLP contained partially pectic-polysaccharide. The major monosaccharides of RLP were rhamnose, glucose, galactose and xylose. RLP was a relatively non-linear, highly branched polysaccharide with short branches based on the monosaccharide ratio. Bioactivity screening had identified the reduction (0.66 ± 0.02 mmol Fe2+/g) and copper chelation (48.5 ± 0.4 %) activities of RLP. The polysaccharide could also absorb ultraviolet (UV) in which it gave major protection against UVB with 8.7 ± 0.3 sun protection factor. These biological activities were related to specific functional groups, monosaccharide units, molecular weight and/or the neutral property of RLP. The current findings provided new insights into the antioxidant, copper chelation and sun protection benefit of RLP.
    MeSH terms: Biphenyl Compounds/chemistry; Metals/chemistry; Microwaves*; Monosaccharides/analysis; Picrates; Plant Extracts/pharmacology; Plant Extracts/chemistry; Ultraviolet Rays; Free Radical Scavengers/pharmacology; Free Radical Scavengers/chemistry
  11. Lubau NSA, Chengebroyen N, Subramaniyan V
    Reprod Sci, 2024 Dec;31(12):3660-3672.
    PMID: 39485609 DOI: 10.1007/s43032-024-01692-8
    This study aimed to investigate the molecular mechanisms by which chronic alcohol consumption impacts female infertility, highlighting significant societal implications. By conducting a comprehensive literature review, we examined existing evidence on the association between long-term alcohol use and female reproductive health. Relevant studies were identified through systematic searches of electronic databases and key journals. We synthesized information on the molecular pathways affected by alcohol consumption, with particular emphasis on oxidative stress, inflammation, and hormonal disruptions. Additionally, we reviewed efforts to address alcohol-related health issues, including public health interventions, regulatory measures, and educational initiatives. Our study found strong evidence linking chronic alcohol consumption to increased mortality rates and a range of preventable diseases globally. Alcohol's effects extend beyond physiological consequences to psychological, social, and economic burdens. Chronic alcohol consumption disrupts hormonal balance and reproductive function, contributing to female infertility. Future research should focus on quantifying mortality risks associated with alcohol consumption, understanding gender-specific patterns in alcohol-related health outcomes, and elucidating the molecular mechanisms underlying female infertility. Addressing these gaps will inform strategies to mitigate the burden of alcohol-induced health issues and promote overall well-being. Collaborative efforts among diverse stakeholders are essential for advancing research agendas and translating findings into effective interventions.
    MeSH terms: Female; Humans; Oxidative Stress
  12. Rajoo A, Siva SP, Sia CS, Chan ES, Tey BT, Low LE
    Eur J Pharm Biopharm, 2024 Dec;205:114572.
    PMID: 39486631 DOI: 10.1016/j.ejpb.2024.114572
    Cosmeceuticals, focusing on enhancing skin health and appearance, heavily rely on emulsions as one of the common mediums. These emulsions pose a challenge due to their dependence on surfactants which are essential for stability but are causing concerns about environmental impact as well as evolving consumer preferences. This has led to research focused on Pickering emulsions (PEs), which are colloidal particle-based emulsion alternatives. Compared to conventional emulsions, PEs offer enhanced stability and functionality in addition to serving as a sustainable alternative but still pose challenges such as rheological control and requiring further improvement in long-term stability, whereby the limitations could be addressed through the introduction of a hydrogel network. In this review, we first highlight the strategies and considerations to optimize active ingredient (AI) absorption and penetration in a PE-based formulation. We then delve into a comprehensive overview of the potential of Pickering-based cosmeceutical emulsions including their attractive features, the various Pickering particles that can be employed, past studies and their limitations. Further, PE hydrogels (PEHs), which combines the features between PE and hydrogel as an innovative solution to address challenges posed by both conventional emulsions and PEs in the cosmeceutical industry is explored. Moreover, concerns related to toxicity and biocompatibility are critically examined, alongside considerations of scalability and commercial viability, providing a forward-looking perspective on potential future research directions centered on the application of PEHs in the cosmeceutical field.
    MeSH terms: Administration, Cutaneous; Animals; Chemistry, Pharmaceutical/methods; Humans; Rheology; Skin/drug effects; Skin/metabolism; Skin Absorption/drug effects; Surface-Active Agents/chemistry
  13. Samarasekera DD, Chong YS, Ban K, Lau LST, Gallagher PJ, Zhi Xiong C, et al.
    Med Teach, 2024 Dec;46(12):1553-1560.
    PMID: 39480997 DOI: 10.1080/0142159X.2024.2409293
    Singapore, located strategically at the meeting point of the Malacca Strait and the South China Sea, has established itself as a global financial and economic hub. Despite its small geographical size, Singapore is home to over 5 million people from diverse cultural backgrounds. The city-state's medical education landscape has evolved significantly over the past century. Originally, Singapore had only one undergraduate medical school, the NUS Yong Loo Lin School of Medicine, established in 1905. Over time, this institution has grown into Singapore's largest and oldest medical school. NUS Medicine's vision centres on developing highly competent, values-driven, and inspired healthcare professionals to transform the practice of medicine and improve health worldwide. A curriculum overhaul in 2020 introduced new educational components to prepare future healthcare professionals for the challenges of Singapore's resilient healthcare system. This includes proficiency in integrated care, collaboration across disciplines, and leveraging AI and data science in clinical decision-making. The introduction of a common curriculum in August 2023 for Medicine, Nursing, Dentistry, and Pharmacy undergraduates further aligns with Singapore's 'Healthier SG' vision, ensuring that graduates are well-equipped to meet the evolving needs of the healthcare landscape. The common curriculum aims to address professional hierarchies and foster interprofessional collaboration among students from diverse academic backgrounds. By promoting frequent interaction and a team-oriented mindset, the curriculum seeks to instil a collective approach to healthcare, emphasising the importance of interprofessional practice in achieving the broader goals of healthcare delivery. This paper describes the reforms that took place and how the challenges were mitigated in a research-intensive top-ranked academic medical institution. This strategic alignment of medical education with national healthcare priorities underscores NUS Medicine's commitment to transforming medical practice and improving health outcomes in Singapore and beyond.
    MeSH terms: Curriculum*; Education, Medical, Undergraduate/organization & administration; Humans; Singapore
  14. Azmi CNA, Azahar SS, Shamsulazri NAN, Hamidon TS, Hussin MH, Nee TW, et al.
    Int J Biol Macromol, 2024 Dec;282(Pt 4):137200.
    PMID: 39489239 DOI: 10.1016/j.ijbiomac.2024.137200
    Corrosion causes significant economic losses and structural failures in industries, highlighting the need for eco-friendly inhibitors. Chitosan (CS), a biodegradable and non-toxic biopolymer, shows potential, though its limited water solubility restricts its applications. To overcome this challenge, this study presents the synthesis of two water-soluble chitosan Schiff bases (CSBs) derived from the shells of Metapenaeus dobsoni (M. dobsoni). The extracted CS exhibits a remarkable degree of deacetylation exceeding 95 %, which was subsequently modified through reactions with o-vanillin (2-hydroxy-3-methoxybenzaldehyde) (CSB I) and 2,3-dihydroxybenzaldehyde (CSB II). Structural characterization using spectroscopic techniques confirmed the successful formation of CSBs. Electrochemical measurements were employed to assess the corrosion resistance of mild steel in 0.5 M HCl with varying concentrations of CSB I and CSB II. The results revealed superior corrosion inhibition by CSB II (% IE = 94.48 %) compared to CSB I (% IE = 88.80 %). The methoxy group in CSB II contributed to its higher electron density and enhanced adsorption, leading to better surface coverage and corrosion resistance. Both inhibitors followed the Langmuir isotherm, suggesting a mix of physisorption and chemisorption. These CSBs are promising for corrosion control in industries like pipelines, storage tanks, construction materials, and acid pickling.
    MeSH terms: Animals; Corrosion; Solubility*; Steel/chemistry; Animal Shells/chemistry
  15. Nordin N, W M Afifi WAF, Majid SR, Abu Bakar N
    Int J Biol Macromol, 2024 Dec;282(Pt 4):137202.
    PMID: 39489246 DOI: 10.1016/j.ijbiomac.2024.137202
    Frequent droughts significantly affect agricultural productivity and highlight the need for effective solutions to improve water availability for crops. This study investigates the potential of chitosan-based hydrogels, biodegradable biopolymers known for their water-retaining properties, to improve soil moisture and promote plant growth during drought periods. Chitosan hydrogels were synthesized using Pluronic F127 and compared with chitosan and chitosan in combination with sodium alginate (CS/Alg-Na). Comprehensive chemical characterizations were performed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and field emission scanning electron microscopy (FESEM). The CS/Pl-F127 hydrogels showed high porosity and a water absorption capacity of 81.5 %, while the CS/Alg-Na exhibited a denser network with a capacity of 93.35 % and improved mechanical strength. Plants in the CS/Pl-F127 hydrogel had a shoot elongation rate of 5.9 mm/day on Day 9, which continued until Day 40. In contrast, shoot elongation in the CS/Alg-Na hydrogel peaked at 7.1 mm/day on Day 20 and maintained growth under drought conditions until Day 33. These results show that all chitosan-based hydrogels improve water use efficiency. CS/Alg-Na provides the best support for plant growth under drought conditions, followed by CS/Pl-F127 and pure chitosan.
    MeSH terms: Alginates/chemistry; Porosity; Spectroscopy, Fourier Transform Infrared; Crops, Agricultural/growth & development; Droughts
  16. Md Yusoff MH, Shafie MH
    Int J Biol Macromol, 2024 Dec;282(Pt 4):137143.
    PMID: 39500430 DOI: 10.1016/j.ijbiomac.2024.137143
    Nowadays, various plant polysaccharides have been successfully extracted which exhibited strong biological activities and might be useful for diabetes management. However, the effect of extraction methods, physicochemical and the structural-activity relationships of polysaccharides to exhibit antioxidants and antidiabetics were inadequate to explain their mechanism in action. The uses of advance extraction methods might be preferred to obtain higher antioxidants and antidiabetic activities of polysaccharides compared to conventional methods, but the determination of optimal extraction conditions might be crucial to preserve their structure and biological functions. Other than that, the physicochemical and structural properties of polysaccharides were closely related to their biological activities such as antioxidant and antidiabetic activities. Therefore, this review addressed the research gap of the influence of extraction methods, physicochemical and structural relationships of polysaccharides to biological activities, pointing out the challenges and limitations as well as future prospects to the current findings.
    MeSH terms: Chemical Fractionation/methods; Humans; Plant Extracts/pharmacology; Plant Extracts/chemistry; Structure-Activity Relationship; Chemical Phenomena
  17. Kuznetsov N, Daida K, Makarious MB, Al-Mubarak B, Brolin KA, Malik L, et al.
    bioRxiv, 2024 Nov 23.
    PMID: 39605431 DOI: 10.1101/2024.11.22.624040
    Copy Number Variations (CNVs) play pivotal roles in the etiology of complex diseases and are variable across diverse populations. Understanding the association between CNVs and disease susceptibility is of significant importance in disease genetics research and often requires analysis of large sample sizes. One of the most cost-effective and scalable methods for detecting CNVs is based on normalized signal intensity values, such as Log R Ratio (LRR) and B Allele Frequency (BAF), from Illumina genotyping arrays. In this study, we present CNV-Finder, a novel pipeline integrating deep learning techniques on array data, specifically a Long Short-Term Memory (LSTM) network, to expedite the large-scale identification of CNVs within predefined genomic regions. This facilitates the efficient prioritization of samples for subsequent, costly analyses such as short-read and long-read whole genome sequencing. We focus on five genes-Parkin (PRKN), Leucine Rich Repeat And Ig Domain Containing 2 (LINGO2), Microtubule Associated Protein Tau (MAPT), alpha-Synuclein (SNCA), and Amyloid Beta Precursor Protein (APP)-which may be relevant to neurological diseases such as Alzheimer's disease (AD), Parkinson's disease (PD), or related disorders such as essential tremor (ET). By training our models on expert-annotated samples and validating them across diverse cohorts, including those from the Global Parkinson's Genetics Program (GP2) and additional dementia-specific databases, we demonstrate the efficacy of CNV-Finder in accurately detecting deletions and duplications. Our pipeline outputs app-compatible files for visualization within CNV-Finder's interactive web application. This interface enables researchers to review predictions and filter displayed samples by model prediction values, LRR range, and variant count in order to explore or confirm results. Our pipeline integrates this human feedback to enhance model performance and reduce false positive rates. Through a series of comprehensive analyses and validations using both short-read and long-read sequencing data, we demonstrate the robustness and adaptability of CNV-Finder in identifying CNVs with regions of varied sparsity, noise, and size. Our findings highlight the significance of contextual understanding and human expertise in enhancing the precision of CNV identification, particularly in complex genomic regions like 17q21.31. The CNV-Finder pipeline is a scalable, publicly available resource for the scientific community, available on GitHub (https://github.com/GP2code/CNV-Finder; DOI 10.5281/zenodo.14182563). CNV-Finder not only expedites accurate candidate identification but also significantly reduces the manual workload for researchers, enabling future targeted validation and downstream analyses in regions or phenotypes of interest.
  18. Boatwright M, Lawrence M, Carriedo A, Slater S, McCoy D, Northcott T, et al.
    PMID: 39620519 DOI: 10.34172/ijhpm.8310
    BACKGROUND: The importance of the international food regulatory system to global health, is often overlooked. There are calls to reform this system to promote healthy and sustainable food systems centred on the Codex Alimentarius Commission (Codex), the United Nation's (UN's) standard-setting body. Yet this presents a significant political challenge, given Codex has historically prioritized food safety risks over wider harms to public health, and is dominated by powerful food exporting nations and industry groups with a primary interest in trade expansion. To better understand this challenge, we examine who participates and contests Codex standards, using the development of the new Guidelines on Front-of-pack Nutrition Labelling (FOPNL) as a case study.

    METHODS: The study involved: (i) collecting Codex Committee on Food Labelling (CCFL) documents (2016-2023); (ii) identification, categorization, and enumeration of actors involved in the development of the Guidelines; and (iii) guided by a constructivist framework, analysis of how actors framed and contested key provisions of the Guidelines.

    RESULTS: Country representation was skewed towards high-income (47.9%). Member state delegations were dominated by non-health ministries (59.8%) and industry actors (16.1%). Industry actors comprised the large majority of observers (84.2%) and civil society actors representing public health interests the least (12.2%). Commercial actors used frames supporting positive FOPNL messages (eg, low in salt) opposing negative ones (eg, "high-in" sugar warnings) and called for product exemptions (eg, sports foods and baby foods). Public health actors used frames supporting simplified FOPNL to reduce consumer confusion, that hold up public health goals, and prevent inappropriate marketing.

    CONCLUSION: Participation in the Guidelines development process suggests stronger preferences for trade facilitation and commerce over public health. Ambitions to reform the international food regulatory system may require an examination of who participates and how to address this asymmetrical representation of interests. These results suggest the need to greatly strengthen public health representation at Codex.

    MeSH terms: Humans; Politics*; Public Health*; United Nations; Global Health; Nutrition Policy/legislation & jurisprudence; Food Safety
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