1.Investigating the Potential of Nigella Sativa and Thymoquinone in Salvaging the Embryo from Effects of Toxic Paternal Exposure to Cyclophosphamide
Suzanah Abdul Rahman ; Nadia Hanis Abdul Samata ; Nur Amalina Ahmad ; Afif Raihan Abdullah ; Syazana Mohamad Zahri
The International Medical Journal Malaysia 2017;16(1):99-106
Background: Exposure to cyclophosphamide (CPA) for cancer treatment results in over-production of
reactive oxygen species and oxidative stress thus affecting the DNA in male germ cell inducing sperm
defects. Our goal is to assess the potential effects of Nigella sativa extract (NSE) and thymoquinone (TQ) on
sperm and embryo quality following fertlization of sperm produced from germ cells which have been
exposed to the damaging alkylating effects of CPA. Methods: Thirty six male ICR mice were divided into six
groups; (I) Vehicle-treated control (normal saline), (II) CPA-only, (III) TQ-only, (IV) NSE-only, (V) CPA
followed by TQ and (VI) CPA followed by NSE. Treatment with 200mg/kg CPA and 10mg/kg of both NSE and
TQ were given by intraperitoneal injection. Animals were sacrificed at 33 days by cervical dislocation and
sperm from caudal epidydymis were taken for analysis and in vitro fertilization (IVF) with eggs from
untreated female. Fertilization rates and embryo development were monitored for 5 days. The result were
analysed by using SPSS 16.Results: TQ and NSE supplementation to CPA-exposed male mice have no
significant effect (p>0.05) on the total number of sperm if compared to CPA-only exposed mice. NSE and TQ
supplementation have been shown to have significant effect (p<0.05) on the percentage of motile sperm as
well as the number of abnormal sperm. Four types of abnormalities of the sperm were found which includes
folded sperm, amorphous, banana-like and the head lacking of the usual hook. Finally, the embryo quality
shows a significant improvement by the supplementation of TQ and NSE to CPA-exposed male mice (p<0.05).
Conclusion: Overall, both NSE and TQ have indicated chemopreventive potential against the cytotoxicity of
cyclophosphamide on the reproductive capacity and fertility.
2.The potential of standardized quassinoid-rich extract of Eurycoma longifolia in the regulation of the oestrous cycle of rats
Rahman Abdul Suzanah ; Ahmad Amalina Nur ; Zahri Syazana ; Abdullah Raihan Afif ; Chan Kit-Lam
Asian Pacific Journal of Tropical Biomedicine 2017;7(1):27-31
Objective: To evaluate the effects of Eurycoma longifolia (E. longifolia) standardized extract on the oestrous cycle, levels of reproductive hormones and histology of the ovaries of Sprague-Dawley rats.
Methods: Female rats were orally treated with E. longifolia standardized extract at the dose levels of 2.5, 5.0, 10.0, 25.0, 50.0 and 100.0 mg/kg of body weight over 5 days. Vaginal smears were monitored daily within the duration and after withdrawal of the treatment before being sacrificed. The body weights of the females were recorded before and after the 5 days treatment. At the end of the experiments, blood samples were collected for determination of testosterone, oestradiol and progesterone levels. Ovaries were removed, weighed and examined for histomorphological changes.
Results: The administration of E. longifolia standardized extract did not significantly alter the oestrous cycle of the rats during the 5 days treatment and after withdrawal of the treatments. This was supported by normal testosterone, oestradiol and progesterone levels as well as normal morphology of the ovaries.
Conclusions: The data obtained showed that E. longifolia standardized extract did not exhibit any toxic effect on reproductive activities of female rats suggesting potential use in the management of infertility.
3.In silico prediction and in vitro analysis of bacteriocin and probiotic properties of Weissella cibaria NM1 isolated from Asian sea bass
Ahmad Zuhairi Abdul Malek ; Nur Amalina Ahmad Lokman ; Boon Chin Tan ; Yin Sze Lim
Malaysian Journal of Microbiology 2021;17(6):708-719
Aims:
This study aims to predict the presence of bacteriocin- and probiotic-associated genes in the genome of Weissella cibaria NM1 isolated from Asian sea bass using a machine learning-based NeuBI prediction approach, followed by the investigation of the crude bacteriocin antimicrobial and probiotic properties via in vitro analysis.
Methodology and results:
This study utilized the machine learning-based NeuBI prediction approach with a homology search of highly conserved bacteriocin-associated genes present in the genome of W. cibaria NM1. This approach discovered a putative bacteriocin gene (WC_2064) and bacteriocin operon with complete immunity, transporter, regulator and modifier genes. Furthermore, the genome of W. cibaria NM1 was found to harboured specific probiotic*associated genes that would contribute to acid and bile tolerance, adhesion on thehost cell and exhibited cholesterolreducing ability. On top of that, the genome also shows the absence of virulence and antibiotic resistance genes, which signifies the safety of W. cibaria NM1 as a potential probiotic candidate. In vitro study has confirmed the antipseudomonal activity of crude bacteriocin NM1 with MIC of 62.5 mg/mL. Weissella cibaria NM1 can tolerate 0.3% (v/v) of bile salt condition and the transit through the simulated gastric (pH 3 and 4) and small intestinal (pH 8) tract.
Conclusion, significance and impact of study
Current findings suggested in silico approach can speed up the search for putative bacteriocin and probiotic-associated genes from the genome of W. cibaria NM1. Nevertheless, further verification through experimental works will be deemed essential.
Bacteriocins
;
Probiotics
;
Weissella
;
Asian
;
Computer Simulation
;
In Vitro Techniques
4. The potential of standardized quassinoid-rich extract of Eurycoma longifolia in the regulation of the oestrous cycle of rats
Suzanah Abdul RAHMAN ; Nur Amalina AHMAD ; Nadia Hanis ABDUL SAMAT ; Syazana ZAHRI ; Afif Raihan ABDULLAH ; Kit-Lam CHAN
Asian Pacific Journal of Tropical Biomedicine 2017;7(1):27-31
Objective To evaluate the effects of Eurycoma longifolia (E. longifolia) standardized extract on the oestrous cycle, levels of reproductive hormones and histology of the ovaries of Sprague-Dawley rats. Methods Female rats were orally treated with E. longifolia standardized extract at the dose levels of 2.5, 5.0, 10.0, 25.0, 50.0 and 100.0 mg/kg of body weight over 5 days. Vaginal smears were monitored daily within the duration and after withdrawal of the treatment before being sacrificed. The body weights of the females were recorded before and after the 5 days treatment. At the end of the experiments, blood samples were collected for determination of testosterone, oestradiol and progesterone levels. Ovaries were removed, weighed and examined for histomorphological changes. Results The administration of E. longifolia standardized extract did not significantly alter the oestrous cycle of the rats during the 5 days treatment and after withdrawal of the treatments. This was supported by normal testosterone, oestradiol and progesterone levels as well as normal morphology of the ovaries. Conclusions The data obtained showed that E. longifolia standardized extract did not exhibit any toxic effect on reproductive activities of female rats suggesting potential use in the management of infertility.
5.Exploring the Potential Use of Supplementary E-learning Tools for Integrated Anatomy-Radiology Teaching
Nur Atiqah Sa&rsquo ; hari @Ramli ; Siti Nurma Hanim Hadie @Haji ; Fazlina Kasim ; Ahmad Hadif Zaidin Samsudin ; Shamsi Amalina Shamsuddin
Malaysian Journal of Medicine and Health Sciences 2022;18(No.1):290-296
The evolution of anatomy education yields a variety of instructional strategies to enhance students’ comprehension
of gross anatomy. Apart from these multi-modality approaches, various studies suggest that anatomy instruction
is more effective when it is taught with radiological integration during the early phase of the medical curriculum.
Studies have shown that the introduction of basic radiological knowledge in anatomy learning enhances visuospatial
skills, which are important for safe clinical practice. Nevertheless, considerable variation in the radiological anatomy
teaching exists in terms of delivery methods, radiological materials, and teaching time. One way to address these
limitations is by using integrated radiology anatomy e-learning platforms. Recent advancements in technology have
given rise to immense attention to e-learning platforms, which have been considered to be an effective modality in
optimising the student learning process. Hence, this article explores the potential use of e-learning tools, namely
integrated with radiological imaging, in teaching gross anatomy.
6.Cytotoxic Activity of Ethanolic Extract Aquilaria malaccensis Leaves Against MCF-7 Cells
Muhammad Yusran Abdul Aziz ; Syed Ahmad Tajudin Tuan Johari ; Wan Nur Amalina Wan Mamat ; Wan Rohani Wan Taib ; Ahmad Syibli Othman ; Mohd Adzim Khalili Rohin
Malaysian Journal of Medicine and Health Sciences 2023;19(No.6):215-221
Introduction: Aquilaria malaccensis, also known as “Pokok Karas” in Malaysia, is widely used in Southeast Asian
countries for the treatment of joint pain, diarrhoea and inflammatory diseases, and has shown beneficial effects as
an anticancer agent. The aim of this study was to investigate the effect of ethanol leaf extracts of A. malaccensis on
MCF-7 cells. Methods: MTT-based cytotoxic and antiproliferative assay was used to determine the outcome of ethanolic extract toward MCF-7 cells. The mode of cell death was determined by the AO/PI double staining assay and
the depolarisation of the mitochondria membrane potential. Results: IC50 value of the extract against MCF-7 cells
treated for 72 hours was 4.1 ± 2.08 µg/mL, while the IC50 value for doxorubicin was 2.92 ± 0.12 µg/mL. The extract
showed a lower cytotoxic effect against the NIH/3T3 cells and inhibited the growth of MCF-7 cells in a dose dependent manner. AO/PI double stain showed that the ethanolic extract of A. malaccensis leaves induced MCF-7 cells
into apoptotic cell death. The present study showed that the ethanolic extract of A. malaccensis induced apoptosis
through mitochondrial pathway as indicated by its ability to take up JC-1. Conclusion: The study found that ethanolic
extract obtained from A. malaccensis leaves is cytotoxic on MCF-7 cells, resulting to apoptotic cell death of the cells.
7.Intraocular Pressure: the Effect of Short-term Fasting and Its Association With Fluid and Fat Status
Nur Raihan Esa ; Nor Azwani Mohd Shukri ; Norsham Ahmad ; Mohd Radzi Hilmi ; Md Muziman Syah Md Mustafa ; Nura Syahiera Ibrahim ; Fatin Amalina Che Arif ; Firdaus Yusof @Alias
Malaysian Journal of Medicine and Health Sciences 2020;16(No.2):180-186
Introduction: Short-term fasting may influence intraocular pressure (IOP) due to alteration of fluid (total body water; TBW, and water intake) and fat (total body fat; TBF). This study aimed: i) to compare IOP values within and between, fasting and non-fasting periods; and ii) to assess the association between IOP and, TBW and TBF. Methods: Thirty healthy participants aged 21.8±1.1 years were assessed on two different periods (fasting vs. non-fasting). During each period, the IOP, TBW and TBF values were assessed for four times (morning, afternoon, evening, late-evening). The IOP was measured using AccuPen® tonopen, while TBW and TBF were assessed by using a Tanita body composition analyser. Results: During fasting, the IOP value in the afternoon (14.53±2.33 mmHg) was significantly higher than in the evening (12.43±2.73 mmHg, p=0.009) and late-evening (12.60±2.44 mmHg, p=0.003). No significant difference in IOP was observed during non-fasting period. The mean of IOP in the evening was significantly lower during fasting compared to non-fasting (12.43±2.73 mmHg vs 13.75±2.53 mmHg, p=0.044). The IOP and TBW were negatively correlated (r=-0.268; p=0.011) during non-fasting and showed no association during fasting period. There was no significant correlation between IOP and TBF during both fasting and non-fasting periods. Conclusion: IOP reduction during short-term fasting, together with the no association with TBF and TBW suggested that IOP is an independent factor that reduces during fasting in healthy population.