Browse publications by year: 2021

  1. Raju V
    Glob J Flex Syst Manag, 2021;22(2):127-139.
    PMID: 38624609 DOI: 10.1007/s40171-021-00264-y
    Year 2020 has cultivated new arena in education. Covid-19 has not only reformed the world but also revived the process of operations. One among them is academics. Never in history of education was a lecture delivered without the physical presence of lecturers, in an academic environment. Even in present wildest innovative decade, the idea of eliminating the academia was not an option. However, after the pandemic encounter, it happened. These are not mere changes, but it is a transformation. While this phenomenon is getting acceptable gradually by takers, the mammoth turnaround is happening in Ph.D. final viva voce defenses too. Practice of online defense is approved by leading Universities so as to avoid stagnation of researchers in final stage. Question is, will it be appropriate to accept final defenses in online stream? and has the institutions developed rubrics to assess the researches which are presented online? Finally, if this is the only choice then how best we can use the technology to generalize it as a system? This research was executed through Delphi technique method from academia, research aspirants and policy-makers. Partial least square is used to quantify the data after interpreting qualitative data. Thirteen homogeneous University's respondents were used as sample. Focus of this paper remains to substantiate the benefits of emerging technology and developing a scheme for virtual streaming, rather identifying reasons to avoid them.
  2. Polas MRH, Raju V
    Glob J Flex Syst Manag, 2021;22(2):95-112.
    PMID: 38624863 DOI: 10.1007/s40171-021-00262-0
    The prime concern of this study is to explore how technology influences entrepreneurial marketing decisions during the world pandemic (COVID-19). The study uses a sample of 127 SMEs from Bangladesh. Data were collected by sending out questionnaires electronically and by mail. Smart PLS (SEM) 3.0 was used to analyse the data following the quantitative method. The study reveals positive and significant relationships between entrepreneurial opportunity recognition, opportunity development and opportunity exploitation with their entrepreneurial marketing decisions. It also claims that entrepreneurial passion mediates the relationship between entrepreneurial opportunity recognition and opportunity development with their entrepreneurial marketing decisions. However, entrepreneurial passion does not mediate the relationship between entrepreneurial opportunity exploitation and entrepreneurial marketing decisions. The study offers researchers a broader and more wide-ranging view of the importance of artificial intelligence in small firms. Researchers, educators and practitioners will benefit from the findings. The analyses are more complex and varied than the methodologies used in most of the limited previous research.
  3. Letchumanan SM, Tajul Arifin AM, Taib I, Rahim MZ, Nor Salim NA
    J Fail Anal Prev, 2021;21(6):2038-2063.
    PMID: 38624883 DOI: 10.1007/s11668-021-01287-4
    Carbon Fiber Reinforced Polymer (CFRP) was designed, simulated, and evaluated as a wrapping material on defected pipe using computational approach. This composite material was considered as a unique wrapping material as it may have the combined characteristics of the constituents or have substantially different properties than the individual constituents. Specifically, this research evaluates the capability of CFRP as a wrapper through SolidWorks Simulation using the static analysis, computational fluid dynamics analysis, and data analysis. This approach gives a preliminary consideration and justification on choosing the optimized lamination orientation of CFRP in real cases based on the simulated data. Various orientations were simulated and analyzed throughout this research. Based on all the simulation analysis, the CFRP wrapper with quasi-isotropic lamination with the 8 plies 45∘/90∘/0∘/45∘s orientation was seen most effective in reducing the stress and possess highest minimum safety factor at the fully defected region (100 × 100 × 7.11 mm thru) after the repair. Eventually, this optimized CFRP lamination orientation, proved that it was able to withstand pressures ranging between 0.86 to 19.6 MPa with a layer thickness in between 0.16 up to 3.76 mm. Based on the static analysis, this optimized laminated orientation of CFRP indeed showed that it was able to reduce the stress on an average of 94.10% after the repair was done. Relatively, CFRP was 0.2% higher in reducing the maximum stress at the defected region at the pipe, than the Glass Fiber Reinforced Polymer with the same orientation. Additionally, the flow simulation analysis in SolidWorks showed that fluid flow was undisrupted after the repair was done, and the wrapped region was resistant to any fluid leakages.
  4. Chilakamarry CR, Sakinah AMM, Zularisam AW, Pandey A
    Syst Microbiol Biomanuf, 2021;1(4):378-396.
    PMID: 38624889 DOI: 10.1007/s43393-021-00036-w
    The rapid industrial and economic development runs on fossil fuel and other energy sources. Limited oil reserves, environmental issues, and high transportation costs lead towards carbon unbiased renewable and sustainable fuel. Compared to other carbon-based fuels, biodiesel is attracted worldwide as a biofuel for the reduction of global dependence on fossil fuels and the greenhouse effect. During biodiesel production, approximately 10% of glycerol is formed in the transesterification process in a biodiesel plant. The ditching of crude glycerol is important as it contains salt, free fatty acids, and methanol that cause contamination of soil and creates environmental challenges for researchers. However, the excessive cost of crude glycerol refining and market capacity encourage the biodiesel industries for developing a new idea for utilising and produced extra sources of income and treat biodiesel waste. This review focuses on the significance of crude glycerol in the value-added utilisation and conversion to bioethanol by a fermentation process and describes the opportunities of glycerol in various applications.
  5. Wong JW, Chiew YS, Desaive T, Chase JG
    IFAC Pap OnLine, 2021;54(15):121-126.
    PMID: 38620762 DOI: 10.1016/j.ifacol.2021.10.242
    Surges of COVID-19 infections could lead to insufficient supply of mechanical ventilators, and rationing of needed care. Multiplexing mechanical ventilators (co-MV) to serve multiple patients is a potential temporary solution. However, if patients are ventilated in parallel ventilation, there is currently no means to match ventilation requirements or patients, with no guidelines to date for co-MV. This research uses patient-specific clinically validated respiratory mechanics models to propose a method for patient matching and mechanical ventilator settings for two-patient co-MV under pressure control mode. The proposed method can simulate and estimate the resultant tidal volume of different combinations of co-ventilated patients. With both patients fulfilling the specified constraint under similar ventilation settings, the actual mechanical ventilator settings for co-MV are determined. This method allows clinicians to analyze in silico co-MV before clinical implementation.
  6. Khoo LS, Hasmi AH, Mahmood MS, Ibrahim MA
    Forensic Sci Int Rep, 2021 Nov;4:100245.
    PMID: 38620858 DOI: 10.1016/j.fsir.2021.100245
    It has been a difficult year ahead since the announcement of COVID-19 as a pandemic by the Director General of the World Health Organization (WHO). Many countries including Malaysia have struggled to take urgent and aggressive measures to advise, detect, screen, test, isolate and treat their citizens in order to fight against the virus. All countries must strike a balance between protecting health, minimizing economic and social disruption and at the same time, preserving human rights which includes managing the dead with dignity and respect. The National Institute of Forensic Medicine (IPFN) Malaysia has been proactively engaging the various agencies involved in a concerted effort to ensure smooth flow in the management of the dead for all COVID-19 and non-COVID-19 cases since the beginning of the outbreak in February 2020. This is in accordance with all existing guidelines and regulations vis-a-vis infection prevention and control in the country. However, new situations that arise during the pandemic are always challenging and dynamic. The COVID-19 crisis has uncovered a plethora of issues surrounding the margin of the Forensic Medicine fraternity. Therefore, this article highlights various emerging issues encountered by the IPFN and how they are resolved through good leadership to guide and direct operations and activities during the exponential rise of COVID-19 infection in Malaysia. In the provision of the management of the dead, it is of utmost importance to note that the humanitarian aspect needs to be emphasized even in times of an outbreak to give closure to the family and the opportunity to mourn their loved ones.
  7. Salem TK, Wong WK, Min TS, Wong EK
    F1000Res, 2021;10:1098.
    PMID: 38618192 DOI: 10.12688/f1000research.58446.2
    Visually impaired persons face challenges in running business activities, especially in handling banknotes. Malaysia researchers had proposed some Ringgit banknotes recognition systems to aid visually impaired persons recognize and classify Ringgit banknotes. However, these electronic banknote readers can only recognize Malaysian Banknotes' Ringgit value, they have no counterfeit detection features. The purpose of this study is to develop a banknote reader that not only can help visually impaired persons recognize the banknote value, but also to detect the counterfeit of the banknote, safeguarding their losses. This paper proposed a Malaysian banknote reader using backlight mechanism and image processing techniques to read and detect counterfeit for one Ringgit and five Ringgit Malaysian banknotes. The developed handheld banknote reader used visual type sensor to capture banknote image, passed to raspberry pi controller to perform image processing on banknote value and the extracted watermarks features. The developed image processing algorithm will trace out the region of interests: 1)see-thru windows, 2)Crescent and Star, 3)Perfect see though register and detect the watermarks features accordingly. The processed result will be passed back to the handheld banknote reader and broadcast on an attached mini speaker to aid the visually impaired understand the holding banknote, whether it is a real one Ringgit, real five Ringgit or none of them. The experimental result shown by this approach able to accomplish numerous round of banknote reading attempts with successful outcomes. Confusion matrix is further employed to study the performance of the banknote reader, in terms of true positive, true negative, false positive and false negative. Details analysis had been focused on the critical false positive cases (predicted real banknote and actually is fake banknote) and false negative cases (predicted fake banknote and it is actually real banknote).
  8. Lim WM
    J Consum Behav, 2021;20(6):1690-1694.
    PMID: 38607794 DOI: 10.1002/cb.1948
    In the midst of the coronavirus pandemic, this article endeavors to offer expeditious insights into the impact of the global humanitarian crisis on the tourism industry from a consumer behavior perspective. To do so, this article employs the theory of crowding as an overarching theoretical lens, the coronavirus disease 2019 (COVID-19) as a context to represent a global humanitarian crisis, and the rapid review approach as a method to source maiden evidence. In doing so, this article sheds light on instances of undercrowding (undertourism) and overcrowding (overtourism) in tourism as a result of COVID-19, with interpretations enriched by agency theory and reactance theory-thereby resulting in the emergence of a new theory called the agency and reactance theory of crowding. The article concludes with pragmatic implications in light of the global humanitarian crisis.
  9. Wooldridge G, O'Brien N, Muttalib F, Abbas Q, Adabie Appiah J, Baker T, et al.
    Andes Pediatr, 2021 Dec;92(6):954-962.
    PMID: 35506809 DOI: 10.32641/andespediatr.v92i6.4030
    The Surviving Sepsis Campaign International Guidelines for the Management of Septic Shock and Sepsis-associated Organ Dysfunction in Children was released in 2020 and is intended for use in all global settings that care for children with sepsis. However, practitioners managing children with sep sis in resource-limited settings (RLS) face several challenges and disease patterns not experienced by those in resource-rich settings. Based upon our collective experience from RLS, we aimed to reflect on the difficulties of implementing the international guidelines. We believe there is an urgent need for more evidence from RLS on feasible, efficacious approaches to the management of sepsis and septic shock that could be included in future context-specific guidelines.
    MeSH terms: Child; Critical Care; Head; Humans; Organizations
  10. Abdullah MFA, Yogarayan S, Abdul Razak SF, Azman A, Muhamad Amin AH, Salleh M
    F1000Res, 2021;10:1104.
    PMID: 38595984 DOI: 10.12688/f1000research.73269.4
    Vehicle to Everything (V2X) communications and services have sparked considerable interest as a potential component of future Intelligent Transportation Systems. V2X serves to organise communication and interaction between vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrians (V2P), and vehicle to networks (V2N). However, having multiple communication channels can generate a vast amount of data for processing and distribution. In addition, V2X services may be subject to performance requirements relating to dynamic handover and low latency communication channels. Good throughput, lower delay, and reliable packet delivery are the core requirements for V2X services.  Edge Computing (EC) may be a feasible option to address the challenge of dynamic handover and low latency to allow V2X information to be transmitted across vehicles. Currently, existing comparative studies do not cover the applicability of EC for V2X. This review explores EC approaches to determine the relevance for V2X communication and services. EC allows devices to carry out part or all of the data processing at the point where data is collected. The emphasis of this review is on several methods identified in the literature for implementing effective EC. We describe each method individually and compare them according to their applicability. The findings of this work indicate that most methods can simulate the EC positioning under predefined scenarios. These include the use of Mobile Edge Computing, Cloudlet, and Fog Computing. However, since most studies are carried out using simulation tools, there is a potential limitation in that crucial data in the search for EC positioning may be overlooked and ignored for bandwidth reduction. The EC approaches considered in this work are limited to the literature on the successful implementation of V2X communication and services. The outcome of this work could considerably help other researchers better characterise EC applicability for V2X communications and services.
    MeSH terms: Cloud Computing*; Communication*; Computer Simulation; Humans; Research Personnel
  11. Nojiri K, Higurashi S, Takahashi T, Tsujimori Y, Kobayashi S, Toba Y, et al.
    BMJ Open, 2021 Dec 30;11(12):e055028.
    PMID: 36282635 DOI: 10.1136/bmjopen-2021-055028
    PURPOSE: The Japanese Human Milk Study, a longitudinal prospective cohort study, was set up to clarify how maternal health, nutritional status, lifestyle and sociodemographic and economic factors affect breastfeeding practices and human milk composition. This would eventually determine factors affecting the growth and development of infants and children.

    PARTICIPANTS: A total of 1210 Japanese lactating women who satisfied the inclusion criteria, were invited across the country at various participating sites, between 2014 and 2019. Finally a total of 1122 women were enrolled in this study.

    FINDINGS TO DATE: Among 1122 eligible participants, mean age at delivery was 31.2 (SD 4.4) years and mean prepregnancy BMI was 20.8 (SD 2.7). Among these women, 35% were previously nulliparous and 77.7% had college, university or higher education. The mean gestational period was 39.0 (SD 1.3) weeks. Caesarean section was reported among 11.9%; mean infant birth weight was 3082 (SD 360) g. Of the infants, 53.7% were male. Overall, our participants appeared to be healthier than the general population in Japan. Analyses of the 1079 eligible human milk samples obtained at the first and second months postpartum showed the following composition: carbohydrate, 8.13 (SD 0.32) g/100 mL; fat, 3.77 (SD 1.29) g/100 mL; and crude protein, 1.20 (SD 0.23) g/100 mL. We also analysed osteopontin, fatty acid, vitamin D and phospholipid levels in limited subcohorts of the samples.

    FUTURE PLANS: Follow-up surveys will be conducted to obtain milk samples every 2 months for 12 months and to investigate mother and child health until the children reach 5 years of age. These will be completed in 2024. We plan to longitudinally analyse the composition of macronutrients and various bioactive factors in human milk and investigate the lifestyle and environmental factors that influence breastfeeding practices, maternal and child health, and child development.

    TRIAL REGISTRATION NUMBER: UMIN000015494; pre-results.

    MeSH terms: Breast Feeding; Carbohydrates; Cesarean Section; Child; Fatty Acids; Female; Humans; Infant; Japan/epidemiology; Lactation; Male; Phospholipids/metabolism; Pregnancy; Prospective Studies; Vitamin D/metabolism; Cohort Studies
  12. Lai JY, Inoue N, Oo CW, Kawasaki H, Lim TS
    RSC Adv, 2021 Jan 04;11(3):1367-1375.
    PMID: 35424103 DOI: 10.1039/d0ra02835e
    Fluorescent carbon nanoparticles have been gaining more attention in recent years for their excellent fluorescence properties and simple synthesis routes. Different carbon sources have been reported for fluorescent carbon nanoparticle synthesis but the use of virus particles as a carbon source is scarce. Herein, we report the utilization of M13 bacteriophage particles as the carbon source to synthesize phage-based nanoparticles through facile, one-step microwave heating. M13 bacteriophage is a nanosized filamentous virus particle with a single-stranded DNA genome encapsulated by a large number of coat proteins. These amino acid rich building blocks provide a substantial amount of carbon source for the synthesis of fluorescent nanoparticles. The resulting nanoparticles from M13 bacteriophage showed good water solubility and exhibited bright blue luminescence. The selectivity and sensitivity of the phage-based nanoparticles towards Fe(iii) ions showed a quenching effect with a linear correlation and a detection limit of 8.0 μM. This process highlights the potential application of virus particles as a source for the synthesis of fluorescent carbon nanoparticles and the sensing application.
  13. Ng YS, Chan DJC
    RSC Adv, 2021 Feb 02;11(11):6049-6059.
    PMID: 35423153 DOI: 10.1039/d0ra08088h
    Floating macrophyte phytoremediation could be the most relevant solution to the ever-increasing finfish farm pond effluent worldwide. However, the information of Spirodela polyrhiza monoculture system in fed batch mode, with periodic harvesting and increased macrophyte density is limited. In this study, the effect of fed batch and periodic harvesting on the treatment capacity and performance of the S. polyrhiza monoculture system (with increased the macrophyte density) in fish farm wastewater were evaluated. Results showed that the system with fed batch and harvesting could treat a greater volume of wastewater, remove a higher amount of pollutants in terms of ammonia (NH3-N), phosphate (PO4 3-), total suspended solids (TSS) and chemical oxygen demand (COD), while meeting the effluent limits. The system with S. polyrhiza macrophyte density of 11.67 g fresh weight (FW) per L wastewater was able to decrease nitrate (NO3 --N) and nitrite (NO2 --N) to an undetected level. This study suggested that the S. polyrhiza monoculture system with fed batch, optimal harvesting and frequent sediment removal is feasible and effective in treating the fish farm wastewater, and produces biomass with superior protein content for fish feed supplement and poultry diet. The obtained data provided insights into the system reliability in wastewater treatment and ways of improvement for the system. The treated wastewater could achieve exceptional quality with minimal toxicity before discharge to receiving waters, and potentially be reused for water flow recharge, aquaculture and irrigation purposes, minimizing the pollution and ecological impacts.
  14. Shamsuddin MR, Asikin-Mijan N, Marliza TS, Miyamoto M, Uemiya S, Yarmo MA, et al.
    RSC Adv, 2021 Feb 04;11(12):6667-6681.
    PMID: 35423191 DOI: 10.1039/d0ra09246k
    Extensive effort has been focused on the advancement of an efficient catalyst for CO2 reforming of CH4 to achieve optimum catalytic activity together with cost-effectiveness and high resistance to catalyst deactivation. In this study, for the first time, a new catalytic support/catalyst system of bifunctional NiO/dolomite has been synthesized by a wet impregnation method using low-cost materials, and it shows unique performance in terms of amphoteric sites and self-reduction properties. The catalysts were loaded into a continuous micro-reactor equipped with an online GC-TCD system. The reaction was carried out with a gas mixture consisting of CH4 and CO2 in the ratio of 1 : 1 flowing 30 ml min-1 at 800 °C for 10 h. The physicochemical properties of the synthesized catalysts were determined by various methods including X-ray diffraction (XRD), N2 adsorption-desorption, H2 temperature-programmed reduction (H2-TPR), temperature-programmed desorption of CO2 (TPD-CO2), and temperature-programmed desorption of NH3 (TPD-NH3). The highest catalytic performance of the DRM reaction was shown by the 10% NiO/dolomite catalyst (CH4 & CO2 conversion, χCH4; χCO2 ∼ 98% and H2 selectivity, S H2 = 75%; H2/CO ∼ 1 : 1 respectively). Bifunctional properties of amphoteric sites on the catalyst and self-reduction behaviour of the NiO/dolomite catalyst improved dry reforming of the CH4 process by enhancing CH4 and CO2 conversion without involving a catalyst reduction step, and the catalyst was constantly active for more than 10 h.
  15. Abdelnaby H, Aboelhassan W, Al-Jarallah M, Rajan R, Dashti R, Zhanna KD, et al.
    Trop Med Int Health, 2021 Dec;26(12):1689-1699.
    PMID: 34601803 DOI: 10.1111/tmi.13685
    OBJECTIVES: To assess the effectiveness and safety of tocilizumab, a humanised anti-interleukin-6 receptor antibody, in the treatment of critical or severe coronavirus disease 2019 (COVID-19) patients.

    METHODS: This was a retrospective cohort study of severe or critical COVID-19 patients (≥18 years) admitted to one hospital in Kuwait. Fifty-one patients received intravenous tocilizumab, while 78 patients received the standard of care at the same hospital. Both groups were compared for clinical improvement and in-hospital mortality.

    RESULTS: The tocilizumab (TCZ) group had a significantly lower 28-day in-hospital mortality rate than the standard-of care-group (21.6% vs. 42.3% respectively; p = 0.015). Fifty-five per cent of patients in the TCZ group clinically improved vs. 11.5% in the standard-of-care group (p 

    MeSH terms: Adult; Aged; Aged, 80 and over; Female; Humans; Kuwait/epidemiology; Male; Middle Aged; Retrospective Studies; Cohort Studies; Young Adult; Antibodies, Monoclonal, Humanized/therapeutic use*
  16. Salem A, Aouididi R, Delatorre Bronzato J, Al-Waeli H, Abufadalah M, Shaikh S, et al.
    J Conserv Dent, 2021;24(2):163-168.
    PMID: 34759583 DOI: 10.4103/jcd.jcd_20_21
    BACKGROUND: The potential of an improved understanding to prevent and treat a complex oral condition such as root caries is important, given its correlation with multiple factors and the uncertainty surrounding the approach/material of choice. Deeper insights into risk factors may improve the quality of treatment and reduce the formation of root surface caries.

    AIM: The present work aims to gain knowledge about dentists' opinions and experiences on assessing the risk factor related to the development of root caries and to help identify any overlooked factors that may contribute to less efficacious clinical outcomes.

    METHODOLOGY: A questionnaire related to root surface caries was distributed among practicing dentists in nine different countries, namely the United Kingdom, Libya, Jordan, Saudi Arabia, Egypt, Brazil, India, Malaysia, and Iraq. Questionnaire responses were analyzed, and the results were compared among the groups.

    RESULTS: Dentists around the world ranked the oral hygiene status of patients as the most important factor in the development of root surface caries. Patients with poor oral hygiene, active periodontal disease, reduced salivary flow, and gingival recession are perceived to have a higher risk of developing new root surface caries. There is a greater focus on prevention in the UK and greater levels of untreated dental disease in other countries, especially those recovering from civil wars.

    CONCLUSION: This work identified some overlooked factors that may have contributed to the less efficacious clinical outcomes reported in the literature. It is hoped that this deep dive into risk factors coupled with the findings presented in Part I of this study will be used as a basis for a more comprehensive investigation into the management of patients with root surface caries.

  17. Mariappan V, Vellasamy KM, Mohamad NA, Subramaniam S, Vadivelu J
    Front Microbiol, 2021;12:718774.
    PMID: 34759896 DOI: 10.3389/fmicb.2021.718774
    On a global scale, antimicrobial resistance (AMR) is recognized as a One Health challenge due to the continual and increased development and distribution of resistant microbes and genes among humans, animals, and the environment. These sectors contribute to the increase in AMR, as antibiotics are widely used in healthcare to treat or prevent bacterial infection; as growth enhancers, therapeutics and metaphylactics in animal husbandry; and transmitted in the environment through irrigation using wastewater or inappropriate disposal and treatment of human and agricultural waste. However, there is a major drawback in terms of the lack of research assessing the coexistence of AMR in these sectors. Extensive research highlighted food-animal manufacture structures that are likely to harbor reservoirs or promote transmission of AMR, in addition to increasing human colonization with AMR commensal bacteria. Numerous antibiotic stewardship policies have been designed and implemented in medical practices and animal husbandry in high- and middle-income countries. However, research concentrating on high-income settings, attitudes, emotions, and beliefs on the utilization of antimicrobials remain underexplored in lower- and middle-income countries such as Malaysia. Microbiological, epidemiological, and social science exploration are required at community and farming across the One Health range to fill huge gaps in information and knowledge of AMR. Manipulating human activities and character associated with antibiotics is a multifaceted progression that includes elements like knowledge, social behavior, attitudes, approaches, social standards, socioeconomic settings, peer pressure, experiences, and biophysical environment. Therefore, understanding these aspects in the utilization of antimicrobial drugs among the different sectors is essential to develop and implement policies to curb AMR development and transmission that overarch all sectors within the One Health consortium in Malaysia.
  18. Anuar TAFT, Ismail A, Mohamed Suffian IF, Abdul Hamid AA, Arzmi MH, Omar MN
    Data Brief, 2021 Dec;39:107485.
    PMID: 34761082 DOI: 10.1016/j.dib.2021.107485
    The data presented here is the liquid chromatography and mass spectrometry (LC-MS) profile of phytochemical compounds in the aqueous extract of Syzygium polyanthum (Wight) Walp. leaves. This plant is consumed raw and sometimes added to local dishes of people in Southeast Asia countries. Most importantly, it has ethnomedicinal values mainly in treating diabetes and hypertension, and at the same time, this plant has anti-microbial, anti-oxidant, anti-cancer, and anti-tumor properties [1]. There are chemical composition variations reported between the same species of different geographical locations, which eventually affect the plant's therapeutic potential [2], [3]. This dataset represents the identified compounds for S. polyanthum (Wight) Walp. leaves, a variant collected from Kuantan, a city located in the Pahang state on the East Coast of Peninsular Malaysia. The leaves were then dried in an open-air at room temperature for three weeks, ground, and then macerated in water inside a bath-sonicator, freeze-dried, and then run using LCMS. The LCMS was run using the ultra-performance liquid chromatography equipped with an electrospray time-of-flight mass spectrometer detector, operated in a negative-ion mode. The mass spectral features from samples raw data were matched with Traditional Medicine (en) and Waters Screening libraries in the Waters UNIFI™ Scientific Information System software version 1.7 (Waters, USA) for compounds identification.
  19. Watroly MN, Sekar M, Fuloria S, Gan SH, Jeyabalan S, Wu YS, et al.
    Drug Des Devel Ther, 2021;15:4527-4549.
    PMID: 34764636 DOI: 10.2147/DDDT.S338548
    Anthraquinones (AQs) are found in a variety of consumer products, including foods, nutritional supplements, drugs, and traditional medicines, and have a wide range of pharmacological actions. Rubiadin, a 1,3-dihydroxy-2-methyl anthraquinone, primarily originates from Rubia cordifolia Linn (Rubiaceae). It was first discovered in 1981 and has been reported for many biological activities. However, no review has been reported so far to create awareness about this molecule and its role in future drug discovery. Therefore, the present review aimed to provide comprehensive evidence of Rubiadin's phytochemistry, biosynthesis, physicochemical properties, biological properties and therapeutic potential. Relevant literature was gathered from numerous scientific databases including PubMed, ScienceDirect, Scopus and Google Scholar between 1981 and up-to-date. The distribution of Rubiadin in numerous medicinal plants, as well as its method of isolation, synthesis, characterisation, physiochemical properties and possible biosynthesis pathways, was extensively covered in this review. Following a rigorous screening and tabulating, a thorough description of Rubiadin's biological properties was gathered, which were based on scientific evidences. Rubiadin fits all five of Lipinski's rule for drug-likeness properties. Then, the in depth physiochemical characteristics of Rubiadin were investigated. The simple technique for Rubiadin's isolation from R. cordifolia and the procedure of synthesis was described. Rubiadin is also biosynthesized via the polyketide and chorismate/o-succinylbenzoic acid pathways. Rubiadin is a powerful molecule with anticancer, antiosteoporotic, hepatoprotective, neuroprotective, anti-inflammatory, antidiabetic, antioxidant, antibacterial, antimalarial, antifungal, and antiviral properties. The mechanism of action for the majority of the pharmacological actions reported, however, is unknown. In addition to this review, an in silico molecular docking study was performed against proteins with PDB IDs: 3AOX, 6OLX, 6OSP, and 6SDC to support the anticancer properties of Rubiadin. The toxicity profile, pharmacokinetics and possible structural modifications were also described. Rubiadin was also proven to have the highest binding affinity to the targeted proteins in an in silico study; thus, we believe it may be a potential anticancer molecule. In order to present Rubiadin as a novel candidate for future therapeutic development, advanced studies on preclinical, clinical trials, bioavailability, permeability and administration of safe doses are necessary.
    MeSH terms: Animals; Anthraquinones/isolation & purification; Anthraquinones/pharmacology*; Anthraquinones/chemistry; Antineoplastic Agents, Phytogenic/isolation & purification; Antineoplastic Agents, Phytogenic/pharmacology*; Antineoplastic Agents, Phytogenic/chemistry; Humans; Medicine, Traditional; Rubia/chemistry; Drug Discovery; Molecular Docking Simulation
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