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  1. Chee, Fong Tyng, Maniam, Kalai Vani, Mariam Abd. Latip
    MyJurnal
    Microsatellite markers associated with blast resistance genes were used to study the polymorphism and genetic relationship among 20 Malaysian upland rice and four varieties from the
    International Rice Research Institute (IRRI) Collection. Among the 11 microsatellite markers used, 10 were polymorphic (90.91%). Only RM313 showed monomorphic pattern. The genetic distances
    ranged from 0 to 0.833. The lowest genetic distance was found between Ambas and Babayau. The highest genetic distance was found between Kedinga and Gulfmont. The average genetic
    distance is 0.478. A dendrogram generated using genetic distance classified all 24 rice samples into 15 clusters. However, there were no well defined groupings. Further research is needed to verify the existence of the blast resistance genes among these Malaysian upland rice samples.
  2. Alvina Simon, Vijay Kumar Subbiah, Chee, Fong Tyng, Noor Hydayaty Md Yusuf
    MyJurnal
    Rice is the most important staple crop in Malaysia and is cultivated all over the country, including the state of Sabah. The uniqueness of rice cultivation in Sabah lies in the type of rice itself, deriving mainly from local or non-commercial cultivars but with distinctive characteristics including long grains, aromatic properties, and drought tolerance. However, despite having these important agricultural traits, information on the genetic diversity of Sabah rice remains limited. Hence, the purpose of this study was to determine the genetic polymorphisms of Sabah rice using random amplification of polymorphic DNA (RAPD) markers. A total of 101 alleles were profiled, from which 94% were identified as polymorphic. Phylogenetic analysis grouped the rice samples into three clusters, with two clusters classifying the ability of rice to grow under different planting conditions, suitable for growth irrigate and upland condition. The first cluster was dominated by cultivars that could survive in wet (irrigated) areas, while the other featured those that were found in dry (upland) areas. Furthermore, two alleles, OPA-05-B2 and OPA-01-B11, were found to be unique to cultivars within the upland cluster and were thus proposed to be involved in dry environmental adaptation. The results of the present study provide an insight into the genetic relationships and diversity of Sabah rice.
  3. Lem FF, Yong YS, Goh S, Chin SN, Chee FT
    Food Chem, 2022 May 30;377:132002.
    PMID: 35033733 DOI: 10.1016/j.foodchem.2021.132002
    The Southeast Asian rainforests, notably in East Malaysia, are home to a diverse range of medicinal plant species with limitless therapeutic potential. Physalis minima (family Solanaceae) is a native East Malaysia plant which is closely linked to P. angulata, are recognized for their various pharmacology properties are abundance in Withanolides, a C28-steroidal lactones based on an ergostane skeleton. This review focuses on the bioactive compounds of this herb, as it is frequently used to treat inflammation, neurodegenerative disease and cancer among East Malaysian ethnic groups. In this review, a total of 103 Withanolides were reported, with 59 of them being newly characterized. Previous scientific data revealed that Withanolides were intriguing principal compounds for inflammatory, neuroinflammatory and cancer treatment due to unique steroidal structure and strong bioactivities. Despite their excellent pharmacological characteristics, only a few Withanolides have been extensively studied, and the majority of them, particularly the newly discovered Withanolides, remained unknown for their therapeutic properties. This indicates that P. minima compounds are worth to be investigate for its pharmacological effects.
  4. Lem FF, Opook F, Lee DJH, Chee FT, Lawson FP, Chin SN
    Front Pharmacol, 2020;11:585331.
    PMID: 33746739 DOI: 10.3389/fphar.2020.585331
    Background: The emergence of COVID-19 as a pandemic has resulted in the need for urgent development of vaccines and drugs and the conduction of clinical trials to fight the outbreak. Because of the time constraints associated with the development of vaccines and effective drugs, drug repurposing and other alternative treatment methods have been used to treat patients that have been infected by the SARS-CoV-2 virus and have acquired COVID-19. Objective: The objective of this systematic scoping review is to provide an overview of the molecular mechanism of action of repurposed drugs or alternative treatment medicines used to attenuate COVID-19 disease. Method: The research articles or gray literature, including theses, government reports, and official news online, were identified from four databases and one search engine. The full content of a total of 160 articles that fulfilled our inclusion criteria was analyzed and information about six drugs (ritonavir, lopinavir, oseltamivir, remdesivir, favipiravir, and chloroquine) and four Traditional Chinese Medicines (Shuang Huang Lian Kou Fu Ye, TCM combination of Bu Huan Jin Zheng Qi San and Da Yuan Yin, Xue Bi Jing Injection, and Qing Fei Pai Du Tang) was extracted. Results: All of the repurposed drugs and complementary medicine that have been used for the treatment of COVID-19 depend on the ability of the drug to inhibit the proliferation of the SARS-CoV-2 virus by binding to enzyme active sites, viral chain termination, or triggering of the molecular pathway, whereas Traditional Chinese Medicine plays a pivotal role in triggering the inflammation pathway, such as the neuraminidase blocker, to fight the SARS-CoV-2 virus.
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