Browse publications by year: 2021

  1. Timothy MR, Ibrahim YKE, Muhammad A, Chechet GD, Aimola IA, Mamman M
    Trop Biomed, 2021 Mar 01;38(1):94-101.
    PMID: 33797530 DOI: 10.47665/tb.38.1.016
    Trypanothione reductase is a key enzyme that upholds the redox balance in hemoflagellate protozoan parasites such as T. congolense. This study aims at unraveling the potency of Kolaviron against trypanothione reductase in T. congolense infection using Chrysin as standard. The experiment was performed using three different approaches; in silico, in vitro and in vivo. Kolaviron and Chrysin were docked against trypanothione reductase, revealing binding energies (-9.3 and -9.0 kcal/mol) and Ki of 0.211μM and 0.151μM at the active site of trypanothione reductase as evident from the observed strong hydrophobic/hydrogen bond interactions. Parasitized blood was used for parasite isolation and trypanothione reductase activity assay using standard protocol. Real-time PCR (qPCR) assay was implored to monitor expression of trypanothione reductase using primers targeting the 177-bp repeat satellite DNA in T. congolense with SYBR Green to monitor product accumulation. Kolaviron showed IC50 values of 2.64μg/ml with % inhibition of 66.78 compared with Chrysin with IC50 values of 1.86μg/ml and % inhibition of 53.80. In vivo studies following the administration of these compounds orally after 7 days post inoculation resulted in % inhibition of Chrysin (57.67) and Kolaviron (46.90). Equally, Kolaviron relative to Chrysin down regulated the expression trypanothione reductase gene by 1.352 as compared to 3.530 of the infected group, in clear agreement with the earlier inhibition observed at the fine type level. Overall, the findings may have unraveled the Kolaviron potency against Trypanosoma congolense infection in rats.
    MeSH terms: Animals; Antiprotozoal Agents/pharmacology*; Flavonoids/pharmacology*; Male; NADH, NADPH Oxidoreductases/antagonists & inhibitors*; Seeds/chemistry; Trypanosoma congolense/drug effects*; Trypanosoma congolense/enzymology; Molecular Structure; Rats, Wistar; Garcinia/chemistry; Rats; Molecular Docking Simulation
  2. Khan TA, Al Nasr IS, Mujawah AH, Koko WS
    Trop Biomed, 2021 Mar 01;38(1):135-141.
    PMID: 33797536 DOI: 10.47665/tb.38.1.023
    Leishmaniasis and toxoplasmosis are parasitic protozoal diseases that pose serious health concerns, especially for immunocompromised people. Leishmania major and Toxoplasma gondii are endemic in Saudi Arabia and are particularly common in the Qassim Region. The present work was conducted to evaluate the in vitro antileishmanial and antitoxoplasmal activity of methanolic extracts and phytochemical fractions from two plants, Euphorpia retusa and Pulicaria undulata, which are ethnobotanical agents used to treat parasitic infection. Whole E. retusa and P. undulata plants were extracted with methanol and fractionated using petroleum ether, chloroform, ethyl acetate, n-butanol, and water and then were tested in vitro against L. major promastigote and the amastigote stages of T. gondii; the cytotoxicity of the extracts was tested against Vero cell line. The methanolic extracts of E. retusa and P. undulata exhibited promising antitoxoplasmal activity against T. gondii with EC50 values 5.6 and 12.7 μg mL-1, respectively. The chloroform fraction of P. undulata was the most potent, exhibiting an EC50 of 1.4 μg mL-1 and SI value of 12.1. It was also the most active fraction against both L. major promastigotes and amastigotes, exhibiting an EC50 of 3.9 and 3.8 μg mL-1 and SI values 4.4 and 4.5, respectively. The chloroform fraction from P. undulata is a very good candidate for the isolation of active antitoxoplasmal and antileishmanial ingredients; therefore, further phytochemical analysis for active compound isolation is highly recommended.
    MeSH terms: Animals; Antiprotozoal Agents/isolation & purification; Antiprotozoal Agents/pharmacology*; Cercopithecus aethiops; Female; Male; Mice, Inbred BALB C; Plant Extracts/pharmacology*; Saudi Arabia; Toxoplasma/drug effects*; Vero Cells; Leishmania major/drug effects*; Ethnobotany; Euphorbia/chemistry*; Mice; Pulicaria/chemistry*; Phytochemicals/isolation & purification; Phytochemicals/pharmacology
  3. Hassan A, Merghany N, Ouchkat F, Regragui W, Kedah H, Hamdy SM, et al.
    Nutr Neurosci, 2021 Nov 28.
    PMID: 34842062 DOI: 10.1080/1028415X.2021.2006955
    BACKGROUND: The safety of Ramadan fasting for Muslim patients suffering from multiple sclerosis (MS) is still a matter of debate. This work aimed to study the clinical course of MS during Ramadan fasting and to clarify the predictors of relapses and symptoms exacerbation.

    METHODS: This retrospective study included 153 Muslim patients with MS. Data related to the disease course before Ramadan were obtained from patients' files, whereas data related to the disease activity during Ramadan, were collected from patients over the two months following Ramadan.

    RESULTS: Patients with MS who experienced relapses, exacerbation of symptoms and development of new symptoms during Ramadan had a statistically significant longer disease duration compared to those who did not experience (P < 0.001, <0.001, 0.01 respectively). Also, patients who experienced relapses, exacerbation of symptoms and development of new symptoms during Ramadan had a statistically significant higher expanded disability status scale (EDSS) compared to those who did not experience (P <0.001, <0.001,0.01, respectively). The occurrence of relapses, exacerbation of symptoms and development of new symptoms during Ramadan, were significantly higher in patients who experienced relapses in the preceding year compared to those who did not (P= 0.002, 0.002, 0.01, respectively). Binary logistic regression revealed that each score elevation of EDSS increased the odds of relapse during Ramadan by 1.02 (P-value = 0.04). Also, each month's increase in disease duration increased the odds of relapse during Ramadan by 1.87 (P-value = 0.046).

    CONCLUSION: High EDSS and long disease duration are independent predictors of relapse during Ramadan.

  4. Zainordin NA, Mohd Shah FZ, Eddy Warman NA, Wan Muhammad Hatta SF, Mohamad AF, Abdul Ghani R
    PMID: 34889204 DOI: 10.1530/EDM-21-0105
    SUMMARY: A 17-year-old lady presented with primary amenorrhoea, headache, nausea and lethargy. She had delayed pubertal development that also includes under-developed breast (Tanner Stage 2). Hormonal investigations showed a high serum prolactin level of 1 680 000 mIU/L (normal value: 45-375 mIU/L), with low oestradiol, progesterone, follicular-stimulating hormone and luteinizing hormone. Early morning cortisol level was 206 nmol/L (normal value: >450 nmol/L), thyroxine was 7.5 pmol/L (normal value: 9.0-24.0 pmol/L) with TSH 5.091 mIU/L (normal value: 0.4-4.5 mlU/L). A pituitary MRI showed a 2.7 (AP) × 3.7 (W) × 4.6 cm (CC) macroadenoma, with invasion into the left cavernous sinus and encasement of cavernous portion of the left internal carotid artery. MRI pelvis showed absent uterus, cervix and 2/3 upper vagina confirming Mullerian hypoplasia. Cytogenetics showed 46XX. These findings were suggestive of Mayer-Rokitansky-Kauser-Hauser (MRKH) syndrome with the presence of a pituitary macroprolactinoma and panhypopituitarism. She was treated with hydrocortisone, levothyroxine and cabergoline. Repeated MRI showed a reduction in tumour size by approximately 50%. This case illustrated a rare coexistence of these two conditions, being only the third reported case in the world. In addition, this would be the first case of a functioning pituitary adenoma in a patient with MRKH syndrome.

    LEARNING POINTS: Comprehensive hormonal and radiological investigations are important in the management of a young patient with primary amenorrhoea. Coexistence pathology of two separate pathologies should be considered in patient presenting with primary amenorrhoea. Early diagnosis of MRKH or any disorders of sex development should be treated early, providing pharmacological, surgical, psychological and emotional support to the patient and reducing risk of associated complications. Abnormal pituitary hormones, particularly panhypopituitarism, would impose greater impact not only psychologically but also metabolically leading to cardiovascular, morbidity and mortality risks in this patient if not treated early. A multidisciplinary approach is necessary for patients presenting with MRKH to ensure appropriate treatments and follow-up across the lifespan of the patient.

  5. Gorjian H, Fahim H, Ghaffari Khaligh N
    Turk J Chem, 2021;45(6):2007-2012.
    PMID: 38144580 DOI: 10.3906/kim-2107-44
    The catalytic activity of poly(N-vinylimidazole), a biocompatible and biodegradable synthetic functional polymer, was investigated for the synthesis of oximes as an efficient, halogen-free, and reusable heterogeneous catalyst. The corresponding oximes were afforded in high to excellent yields at room temperature and in short times using the planetary ball mill technique. Some merits, such as the short reaction times and good yields for poorly active carbonyl compounds, and avoiding toxic, expensive, metal-containing catalysts, and hazardous and flammable solvents, can be mentioned for the current catalytic synthesis of the oximes. Furthermore, the heterogeneous organocatalyst could be easily separated after the reaction, and the regenerated catalyst was reused several times with no significant loss of its catalytic activity.
  6. Sharif-Nia H, She L, Froelicher ES, Arslan G, Hejazi S, Fomani FK, et al.
    J Child Adolesc Ment Health, 2021;33(1-3):111-122.
    PMID: 38041437 DOI: 10.2989/17280583.2023.2274339
    Background: Resilience is a measure of the ability to cope with stress and the accurate measurement of it is critical. This study aimed to translate and evaluate the psychometric properties of the Connor-Davidson Resilience Scale in Iranian adolescents during the Coronavirus Disease (COVID-19) pandemic.Methods: In this cross-sectional study, after the scale translation, the content and construct validity were assessed using exploratory and confirmatory factor analysis. Moreover, internal consistency, composite reliability, and invariance measurement were evaluated.Results: The content validity ratio was greater than 0.49, and the modified kappa coefficient for all items was higher than 0.6. With exploratory factor analysis, two factors were extracted consisting of 16 items and explaining 43% of the total variance. The results of confirmatory factor analysis indicated a good fit for the model. Cronbach's alpha and composite reliability for both factors were greater than 0.7. Although there is no significant difference (p = 0.09) in the average resilience of adolescents in different provinces, boys (42.64 ± 10.90) had a significantly (p < 0.001) higher resilience score than girls (40.10 ± 11.92).Conclusion: The study results showed that the Persian 16-item version of the Connor-Davidson Resilience Scale has acceptable reliability and validity in the Iranian adolescent population.
  7. AlSahow A, Muenz D, Al-Ghonaim MA, Al Salmi I, Hassan M, Al Aradi AH, et al.
    Clin Kidney J, 2021 Mar;14(3):820-830.
    PMID: 33777365 DOI: 10.1093/ckj/sfz195
    BACKGROUND: Dialysis adequacy, as measured by single pool Kt/V, is an important parameter for assessing hemodialysis (HD) patients' health. Guidelines have recommended Kt/V of 1.2 as the minimum dose for thrice-weekly HD. We describe Kt/V achievement, its predictors and its relationship with mortality in the Gulf Cooperation Council (GCC) (Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the United Arab Emirates).

    METHODS: We analyzed data (2012-18) from the prospective cohort Dialysis Outcomes and Practice Patterns Study for 1544 GCC patients ≥18 years old and on dialysis >180 days.

    RESULTS: Thirty-four percent of GCC HD patients had low Kt/V (<1.2) versus 5%-17% in Canada, Europe, Japan and the USA. Across the GCC countries, low Kt/V prevalence ranged from 10% to 54%. In multivariable logistic regression, low Kt/V was more common (P 

  8. Alhabib KF, Al-Rasadi K, Almigbal TH, Batais MA, Al-Zakwani I, Al-Allaf FA, et al.
    PLoS One, 2021;16(6):e0251560.
    PMID: 34086694 DOI: 10.1371/journal.pone.0251560
    BACKGROUND AND AIMS: Familial hypercholesterolemia (FH) is a common autosomal dominant disorder that can result in premature atherosclerotic cardiovascular disease (ASCVD). Limited data are available worldwide about the prevalence and management of FH. Here, we aimed to estimate the prevalence and management of patients with FH in five Arabian Gulf countries (Saudi Arabia, Oman, United Arab Emirates, Kuwait, and Bahrain).

    METHODS: The multicentre, multinational Gulf FH registry included adults (≥18 years old) recruited from outpatient clinics in 14 tertiary-care centres across five Arabian Gulf countries over the last five years. The Gulf FH registry had four phases: 1- screening, 2- classification based on the Dutch Lipid Clinic Network, 3- genetic testing, and 4- follow-up.

    RESULTS: Among 34,366 screened patient records, 3713 patients had suspected FH (mean age: 49±15 years; 52% women) and 306 patients had definite or probable FH. Thus, the estimated FH prevalence was 0.9% (1:112). Treatments included high-intensity statin therapy (34%), ezetimibe (10%), and proprotein convertase subtilisin/kexin type 9 inhibitors (0.4%). Targets for low-density lipoprotein cholesterol (LDL-C) and non-high-density lipoprotein cholesterol were achieved by 12% and 30%, respectively, of patients at high ASCVD risk, and by 3% and 6%, respectively, of patients at very high ASCVD risk (p <0.001; for both comparisons).

    CONCLUSIONS: This snap-shot study was the first to show the high estimated prevalence of FH in the Arabian Gulf region (about 3-fold the estimated prevalence worldwide), and is a "call-to-action" for further confirmation in future population studies. The small proportions of patients that achieved target LDL-C values implied that health care policies need to implement nation-wide screening, raise FH awareness, and improve management strategies for FH.

    MeSH terms: Ezetimibe/therapeutic use; Bahrain/epidemiology; Female; Humans; Hyperlipoproteinemia Type II/drug therapy; Hyperlipoproteinemia Type II/metabolism; Hyperlipoproteinemia Type II/epidemiology*; Kuwait/epidemiology; Cholesterol, LDL/metabolism; Male; Middle Aged; Oman/epidemiology; Registries; Risk Factors; Saudi Arabia/epidemiology; Serine Endopeptidases/metabolism; United Arab Emirates/epidemiology; Prevalence
  9. Alasfour S, Alfailakawi HS, Shamsaldeen YA
    SAGE Open Med Case Rep, 2021;9:2050313X211019789.
    PMID: 34104447 DOI: 10.1177/2050313X211019789
    Bartter syndrome is a rare autosomal recessive disorder characterized by hypokalaemia. Hypokalaemia is defined as low serum potassium concentration ˂3.5 mmol/L, which may lead to arrhythmia and death if left untreated. The aim of this case report was to normalize serum potassium concentration without the need for intravenous intervention. A 5-month-old male of 2.7 kg body weight diagnosed with Bartter syndrome was admitted to the general paediatric ward with acute severe hypokalaemia and urinary tract infection. The main challenge was the inability to administer drugs through intravenous route due to compromised body size. Therefore, we shifted the route of administration to the nasogastric tube/oral route. A total of 2 mL of concentrated intravenous potassium chloride (4 mEq potassium) were dissolved in distilled water and administered through nasogastric tube. Serum potassium concentration was rapidly normalized, which culminated in patient discharge. In conclusion, shifting drug administration from intravenous to oral route in a paediatric patient with Bartter syndrome includes numerous advantages such as patient convenience, minimized risk of cannula-induced infection, and reduced nurse workload.
  10. Apuke OD, Omar B
    Telemat Inform, 2021 Jan;56:101475.
    PMID: 34887612 DOI: 10.1016/j.tele.2020.101475
    Fake news dissemination on COVID-19 has increased in recent months, and the factors that lead to the sharing of this misinformation is less well studied. Therefore, this paper describes the result of a Nigerian sample (n = 385) regarding the proliferation of fake news on COVID-19. The fake news phenomenon was studied using the Uses and Gratification framework, which was extended by an "altruism" motivation. The data were analysed with Partial Least Squares (PLS) to determine the effects of six variables on the outcome of fake news sharing. Our results showed that altruism was the most significant factor that predicted fake news sharing of COVID-19. We also found that social media users' motivations for information sharing, socialisation, information seeking and pass time predicted the sharing of false information about COVID-19. In contrast, no significant association was found for entertainment motivation. We concluded with some theoretical and practical implications.
  11. Nasir AM, Awang N, Hubadillah SK, Jaafar J, Othman MHD, Wan Salleh WN, et al.
    J Water Process Eng, 2021 Aug;42:102111.
    PMID: 35592059 DOI: 10.1016/j.jwpe.2021.102111
    Photocatalytic technology offers powerful virus disinfection in wastewater via oxidative capability with minimum harmful by-products generation. This review paper aims to provide state-of-the-art photocatalytic technology in battling transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in wastewater. Prior to that, the advantages and limitations of the existing conventional and advanced oxidation processes for virus disinfection in water systems were thoroughly examined. A wide spectrum of virus degradation by various photocatalysts was then considered to understand the potential mechanism for deactivating this deadly virus. The challenges and future perspectives were comprehensively discussed at the end of this review describing the limitations of current photocatalytic technology and suggesting a realistic outlook on advanced photocatalytic technology as a potential solution in dealing with similar upcoming pandemics. The major finding of this review including discovery of a vision on the possible photocatalytic approaches that have been proven to be outstanding against other viruses and subsequently combatting SARS-CoV-2 in wastewater. This review intends to deliver insightful information and discussion on the potential of photocatalysis in battling COVID-19 transmission through wastewater.
  12. Maliki ABHM, Abdullah MR, Nadzmi A, Zainoddin MAR, Puspitasari IM, Jibril NFA, et al.
    Data Brief, 2021 Feb;34:106582.
    PMID: 33354597 DOI: 10.1016/j.dib.2020.106582
    These datasets described the data of the Motor Performance Index for 7 years old kids in Malaysia based on Malaysia's physical fitness test SEGAK. This database has been designed and created with data analysis to create the index from the factor and variable of the test and the test was conducted in the majority of the national primary school in Malaysia. Gender, state of origin, and residential location of the school were the factors used to categorize the participant of the test. The factor of age, weight, height, body mass index (BMI), power, flexibility, coordination, and speed were used for the measurement to relate with the participant's physical fitness. Kids Motor Performances Index data can be reused for talent identification in sport talent scout and to create a baseline for kid's biology growth specifically in gross motor skills and cognitive growth measurement.
  13. Ezzuldin M Saber S, Md Jamil SNA, Abdullah LC, Choong TSY, Ming Ting T
    RSC Adv, 2021 Feb 17;11(14):8150-8162.
    PMID: 35423311 DOI: 10.1039/d0ra10910j
    This study performs an appraisal of the adsorptive capacity of amidoxime-modified poly(acrylonitrile-co-acrylic acid) or abbreviated as (AO-modified poly(AN-co-AA)) for the p-nitrophenol (PNP) adsorption, from aquatic environments via batch system. The AO-modified poly(AN-co-AA) polymer was developed with redox polymerization, and then altered by using hydroxylamine hydrochloride (HH). Tools used to describe the physicochemical and morphological characteristics of the AO-modified poly(AN-co-AA) were Fourier transform infrared (FTIR) spectroscopy, CHN elemental analysis, X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The adsorption kinetics were examined by pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion kinetic models. Meanwhile, the isotherms were investigated by Langmuir, Freundlich, Temkin and Redlich-Peterson models. It was found that the adsorption was best fitted with pseudo-second order, and agreed with both Langmuir and Freundlich isotherm models. It was described best with the Freundlich isotherm due to highest R 2 (0.999). The maximum adsorption capacity was 143.06 mg g-1 at 298 K, and thermodynamic functions showed that the adsorption process was exothermic. Also, following five regeneration cycles, the adsorbent recorded 71.7% regeneration efficiency. The finding in this study indicates that the AO-modified poly(AN-co-AA) is an effective adsorbent to remove PNP from an aqueous solution.
  14. Alroomi M, Rajan R, Omar AA, Alsaber A, Pan J, Fatemi M, et al.
    Immun Inflamm Dis, 2021 Dec;9(4):1648-1655.
    PMID: 34438471 DOI: 10.1002/iid3.517
    INTRODUCTION: This study aims to investigate in-hоsрitаl mоrtаlity in severe асute resрirаtоry syndrоme соrоnаvirus 2 раtients strаtified by serum ferritin levels.

    METHODS: Patients were stratified based on ferritin levels (ferritin levels ≤ 1000 or >1000).

    RESULTS: Approximately 89% (118) of the patients with ferritin levels > 1000 had pneumonia, and 51% (67) had hypertension. Fever (97, 73.5%) and shortness of breath (80, 61%) were two major symptoms among the patients in this group. Logistic regression analysis indicated that ferritin level (odds ratio [OR] = 0.36, 95% confidence interval [CI] = 0.21-0.62; p  1000.

    CONCLUSION: In this study, higher levels of serum ferritin were found to be an independent predictor of in-hоsрitаl mоrtаlity.

    MeSH terms: Ferritins; Humans; Male; Pneumonia*
  15. Lim JY, Amit N, Ali NM, Leong HY, Mohamad M, Rajikan R
    Intractable Rare Dis Res, 2021 Nov;10(4):246-256.
    PMID: 34877236 DOI: 10.5582/irdr.2021.01124
    Disorders of amino acid and nitrogen metabolism (AANMDs) occur due to an enzyme deficiency in a normal biochemical pathway. Nutritional intervention is recognized as the mainstay of treatment for children diagnosed with AANMD. Hence, this scoping review aimed to identify the nutritional interventions available in managing AANMD disorders and their effects on nutritional status. A systematic search using PRISMA Extension for Scoping Reviews (PRISMA-ScR) method was conducted across 4 databases: PubMed, ScienceDirect (Elsevier), EBSCOhost and Cochrane Central Register of Controlled Trials (CENTRAL). Inclusion criteria for the study to be selected are: subjects aged less than 18-year-old, article published in English, utilized an experimental design and published within the past 20 years. A total of 22 articles were included in this review. The majority of the subjects are boys (55.6%) and employed a randomized controlled trial (RCT) study design (45.4%). Nutritional interventions were categorized into 4 categories which are: "protein substitute" (n = 5), "protein substitute with modified composition" (n = 6), "nutrient supplementation (n=8)", and "distribution and dosage of protein substitute (n = 3)". The most frequently assessed outcomes were biochemical parameters that gauge the effectiveness of metabolic control (68.2%). Overall, "protein substitute enriched with inhibitive amino acids", "long-chain polyunsaturated fatty acids supplementation", and "evenly distributed protein substitute" demonstrated beneficial effects towards the nutritional status, especially in terms of biochemical parameters. In summary, nutritional intervention plays a significant role in improving the nutritional status of AANMD patients. Further investigations of nutritional intervention among AANMD children using a meta-analysis approach are necessary for better comprehension of their impact in management of AANMD disorders.
  16. Hon KW, Zainal Abidin SA, Othman I, Naidu R
    Front Pharmacol, 2021;12:768861.
    PMID: 34887764 DOI: 10.3389/fphar.2021.768861
    Colorectal cancer (CRC) is one of the most frequently diagnosed cancers worldwide. Metabolic reprogramming represents an important cancer hallmark in CRC. Reprogramming core metabolic pathways in cancer cells, such as glycolysis, glutaminolysis, oxidative phosphorylation, and lipid metabolism, is essential to increase energy production and biosynthesis of precursors required to support tumor initiation and progression. Accumulating evidence demonstrates that activation of oncogenes and loss of tumor suppressor genes regulate metabolic reprogramming through the downstream signaling pathways. Protein kinases, such as AKT and c-MYC, are the integral components that facilitate the crosstalk between signaling pathways and metabolic pathways in CRC. This review provides an insight into the crosstalk between signaling pathways and metabolic reprogramming in CRC. Targeting CRC metabolism could open a new avenue for developing CRC therapy by discovering metabolic inhibitors and repurposing protein kinase inhibitors/monoclonal antibodies.
  17. Mohd Yusof Chan NN, Idris A, Zainal Abidin ZH, Tajuddin HA, Abdullah Z
    RSC Adv, 2021 Apr 07;11(22):13409-13445.
    PMID: 35423891 DOI: 10.1039/d1ra00129a
    Large (mega) Stokes shift molecules have shown great potential in white light emission for optoelectronic applications, such as flat panel display technology, light-emitting diodes, photosensitizers, molecular probes, cellular and bioimaging, and other applications. This review aims to summarize recent developments of white light generation that incorporate a large Stokes shift component, key approaches to designing large Stokes shift molecules, perspectives on future opportunities, and remaining challenges confronting this emerging research field. After a brief introduction of feasible pathways in generating white light, exemplifications of large Stokes shift molecules as white light candidates from organic and inorganic-based materials are illustrated. Various possible ways to design such molecules have been revealed by integrating the photophysical mechanisms that are essential to produce red-shifted emission upon photoexcitation, such as excited state intramolecular proton transfer (ESIPT), intramolecular charge transfer (ICT), excited state geometrical relaxation or structural deformation, aggregation-induced emission (AIE) alongside the different formations of aggregates, interplay between monomer and excimer emission, host-guest interaction, and lastly metal to ligand charge transfer (MLCT) via harvesting triplet state. Furthermore, previously reported fluorescent materials are described and categorized based on luminescence behaviors on account of the Stokes shifts value. This review will serve as a rationalized introduction and reference for researchers who are interested in exploring large or mega Stokes shift molecules, and will motivate new strategies along with instigation of persistent efforts in this prominent subject area with great avenues.
  18. Poh ME, Ampikaipakan S, Liam CK, Chai CS, Ramanaidoo D, Haja Mydin H
    J Asthma Allergy, 2021;14:629-640.
    PMID: 34140782 DOI: 10.2147/JAA.S309143
    BACKGROUND: There have been limited reports looking into the care of patients with asthma exacerbations admitted to tertiary hospitals in Southeast Asia. This study aims to determine the extent in which the 2019 Global Initiative for Asthma (GINA) guidelines were being met.

    METHODS: A retrospective study of patients with asthma exacerbations admitted to the University of Malaya Medical Centre (UMMC) and Pantai Hospital Kuala Lumpur (PHKL), Malaysia from 1 July 2019 to 31 December 2019.

    RESULTS: There were significant numbers of patients with previous admissions for asthma in both centres, with almost 50% experiencing an exacerbation in the previous year. Approximately 75% of the patients considered their asthma to be controlled when asked, despite many of them having had a history of acute exacerbations in the previous year. When cross-checked, the level of GINA-defined asthma control remained low, with only 6.4% of the patients deemed to have good control, while asthma was partially controlled in 25.6% of the patients and uncontrolled in 68% of the patients. About 72.1% of the patients reported daytime symptoms, 65.1% of the patients reported night-time symptoms, 70.9% of the patients required frequent usage of rescue inhalers and 72.1% of the patients reported some limitation in their activity prior to the current asthma exacerbation. Almost a quarter of the patients who were admitted had severe or life-threatening exacerbations as defined by GINA. These patients had more hospitalizations in a year and were more likely to have previous admissions requiring non-invasive and invasive ventilation. They were also more likely to be on GINA Step 5 treatment, had a lower mean percent predicted FEV1 and a higher baseline blood eosinophil count. Multivariate analysis revealed that baseline eosinophil count were independently associated with severe or life-threatening asthma exacerbations (odds ratio: 1.01, 95% confidence interval: 1.00-1.01, p=0.001). Failure to adhere to daily controller medications was high in this study (37.2%).

    CONCLUSION: Although the management of asthma exacerbations in tertiary hospitals in Southeast Asia is largely congruous with international guidelines, there is room for improvement. As there is a marked discrepancy between patient-perceived and guideline-defined asthma control, efforts to increase awareness on the dangers of uncontrolled asthma are warranted.

  19. D'Aeth JC, van der Linden MP, McGee L, de Lencastre H, Turner P, Song JH, et al.
    Elife, 2021 Jul 14;10.
    PMID: 34259624 DOI: 10.7554/eLife.67113
    Multidrug-resistant Streptococcus pneumoniae emerge through the modification of core genome loci by interspecies homologous recombinations, and acquisition of gene cassettes. Both occurred in the otherwise contrasting histories of the antibiotic-resistant S. pneumoniae lineages PMEN3 and PMEN9. A single PMEN3 clade spread globally, evading vaccine-induced immunity through frequent serotype switching, whereas locally circulating PMEN9 clades independently gained resistance. Both lineages repeatedly integrated Tn916-type and Tn1207.1-type elements, conferring tetracycline and macrolide resistance, respectively, through homologous recombination importing sequences originating in other species. A species-wide dataset found over 100 instances of such interspecific acquisitions of resistance cassettes and flanking homologous arms. Phylodynamic analysis of the most commonly sampled Tn1207.1-type insertion in PMEN9, originating from a commensal and disrupting a competence gene, suggested its expansion across Germany was driven by a high ratio of macrolide-to-β-lactam consumption. Hence, selection from antibiotic consumption was sufficient for these atypically large recombinations to overcome species boundaries across the pneumococcal chromosome.
    MeSH terms: Anti-Bacterial Agents/pharmacology*; DNA Transposable Elements; Genes, Bacterial/genetics; Germany; Humans; Phylogeny; Serotyping; Streptococcus pneumoniae/drug effects; Streptococcus pneumoniae/genetics; Macrolides/pharmacology; Pneumococcal Vaccines; Gene Transfer, Horizontal*; Drug Resistance, Bacterial/drug effects*; Drug Resistance, Bacterial/genetics*; Serogroup
  20. Alipal J, Lee TC, Koshy P, Abdullah HZ, Idris MI
    Heliyon, 2021 Jul;7(7):e07408.
    PMID: 34296002 DOI: 10.1016/j.heliyon.2021.e07408
    Anodised titanium has a long history as a coating structure for implants due to its bioactive and ossified surface, which promotes rapid bone integration. In response to the growing literature on anodised titanium, this article is the first to revisit the evolution of anodised titanium as an implant coating. The review reports the process and mechanisms for the engineering of distinctive anodised titanium structures, the significant factors influencing the mechanisms of its formation, bioactivity, as well as recent pre- and post-surface treatments proposed to improve the performance of anodised titanium. The review then broadens the discussion to include future functional trends of anodised titanium, ranging from the provision of higher surface energy interactions in the design of biocomposite coatings (template stencil interface for mechanical interlock) to techniques for measuring the bone-to-implant contact (BIC), each with their own challenges. Overall, this paper provides up-to-date information on the impacts of the structure and function of anodised titanium as an implant coating in vitro and in/ex vivo tests, as well as the four key future challenges that are important for its clinical translations, namely (i) techniques to enhance the mechanical stability and (ii) testing techniques to measure the mechanical stability of anodised titanium, (iii) real-time/in-situ detection methods for surface reactions, and (iv) cost-effectiveness for anodised titanium and its safety as a bone implant coating.
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