Background: Human brain endothelial cells (HBECs) are part of the blood-brain barrier (BBB). BBB acts as a barrier to control the passage of molecules or materials from the blood into the brain. Identification of specific proteins changes in their expressions that are related to disease state is important in order to understand the disease mechanism involving brain vasculature. To achieve that, the techniques involve in identifying the proteins of interest must be optimized prior to further investigation. Methodology: In this study, identification of Claudin-5 in HBEC lysates was tested using different sample preparation techniques such as; 1) reducing with Dithiothreitol (DTT) and non-reducing conditions; 2) denaturing by heating at 95°C for 5 minutes or 70°C for 20 minutes and 3) protein loading at 3 and 4 µg. The samples were then subjected to an automated capillary-based immunoassay, Jess. Results and Discussion: The results showed that HBEC samples loaded at 4 µg and heated for 5 minutes at 95°C with DTT produced clearer and intense bands for Claudin-5 identification compared to the other set ups. As reducing condition and denaturing by heated at 95°C for 5 minutes conditions demonstrated good results, the conditions were used to identify ICAM-1 expression at different protein loading (3 and 4 µg). The result demonstrated that HBEC samples heated for 5 minutes at 95°C with DTT and loaded at 4 µg produced a good detection for ICAM-1. Conclusion: These optimized conditions could be served as a standard procedure for further identification of Claudin-5 and ICAM-1 proteins in HBEC using a capillary immunoassay instrument.
Ficus deltoidea or ‘mas cotek,’ is a uterotonic herb traditionally consumed by women to improve menstrual circulation, assist labour, remove retained placenta and treat postpartum bleeding. The aim of the study was to elucidate the mechanism of F. deltoidea in uterine contraction. Crude extracts from 2 different variants of F. deltoidea were used in the study; F. deltoidea var. Deltoidea (FDD) and F. deltoidea var. Angustifolia (FDA). This study was conducted ex vivo on the strips of isolated rats uterus treated with either FDD or FDA aqueous extract with increasing concentrations ranging from 10 μg/ml until 1280 μg/ml at time intervals of 5 minutes between doses. The frequency and intensity of the uterine contractions were monitored via Powerlab software. Maximum contractions for both extracts were identified, recorded and the uterine strips samples at maximum contraction were selected and homogenized in order determine the role of prostaglandin F2α (PGF2α) in the mechanism of uterine contraction. Other than that, phosphorylated 42/44 (p42/44) of mitogen activated protein kinase (MAPK) expression was also detected via immunoblotting. The results showed that the maximum contraction induced by FDD was at the concentration of 320 μg/ml, whereas for FDA was at 960 μg/ml. Both FDD and FDA increased the intensity of uterine strips contractions and there were notable trend of increased PGF2α expression as well. Further analysis revealed that the uterine contractions involved the MAPK pathway through the phosphorylation of p42/44 protein. In conclusion, Ficus deltoidea of both variants have the ability to stimulate uterine contraction through the mechanism of MAPK pathway.
Postprandial hyperglycemia is independently related to cardiovascular disease. Garlic, ginger, lemon, honey and apple cider vinegar are known to have anti-glycemic properties. However, the effectiveness of combination of these natural products on reducing postprandial glycemia is uncertain. The aim of the present study was to investigate the glucose-lowering effect of a novel mixture consisting of apple cider vinegar, garlic, ginger, lemon, and honey; alone and in combination with exercise in response to a high-carbohydrate meal in non-diabetic individuals. Ten, female subjects (mean age: 25 ± 2.67 years, mean BMI: 22.6 ± 3.5 kg/m2) participated in this randomised, cross-over intervention consisting of four trials: control (CON), mixture only (MIX), exercise only (EX), and exercise + mixture (EX-MIX). All trials involved consumption of a high-carbohydrate breakfast, then followed by rest in CON, consumption of natural product mixture in MIX, brisk-walking exercise in EX, and combination of mixture and exercise in EX-MIX. Blood glucose was measured at fasting, and at 30, 60, 90, 120 minutes post meal. Postprandial glucose response was calculated as area under the glucose curve. Two-way repeated measures ANOVA showed a significant group and time interaction (p < 0.001). Compared to CON, postprandial glucose responses were 8%, 13% and 15% lower in MIX (p = 0.049), EX (p = 0.001) and EX-MIX (p = 0.005) respectively. Postprandial glucose was 8% lower in EX-MIX compared to MIX (p = 0.002). In conclusion, consuming natural product mixture containing garlic, ginger, lemon, honey and apple cider vinegar reduced postprandial glycemia to a certain extent, however, combining mixture with exercise produced a greater attenuation effect compared to consuming mixture alone. This finding is indicative of a potential benefit of the novel mixture as a complementary management of hyperglycemia in high-risk individuals.
Zingiber zerumbet has been traditionally used as an anti-inflammation and antioxidant agent. The present study
investigates the neuroprotective effects of ethyl acetate extract of Z. zerumbet against oxidative stress on paraquat
(PQ)-induced Parkinsonism in rats. Forty male Sprague-Dawley rats were divided into five groups: Negative control
(normal saline), positive control (N-acetylcysteine, NAC 20 mg/kg + PQ 10 mg/kg), PQ only, 200 mg/kg Z. zerumbet +
PQ and 400 mg/kg Z. zerumbet + PQ. The extract was given orally for 19 consecutive days and PQ was administered
intraperitoneally on day 8-12th of the treatment regime. Both serum and fresh brains containing substantia nigra (SN)
region were taken for biochemical and histological analysis. Administration of both 200 and 400 mg/kg ethyl acetate
Z. zerumbet extracts to the PQ-treated groups have resulted in: Decreased levels of MDA and PC in the SN homogenates;
and increased SOD, GPx; and CAT activities in the SN and serum. Overall, ethyl acetate extract of Z. zerumbet reduced
oxidative stress in the SN of PQ-induced neuronal damages, therefore, has the potential to be developed as a preventive
agent for neurodegenerative disorders caused by environmental toxins.
The emergence of research about the biological effects of electromagnetic field (EMF) have growing concern among
researchers. The aim of this study was to investigate the effects on the brain of rats periodically exposed to 0.1 mT EMF.
Total 24 adult male Sprague Dawley rats were subdivided randomly to 4 groups: 2 control groups (C1 6 hours: 6 h/
day for 5 days; C2 20 hours: 20 h/day for 5 days) and 2 treatment groups which exposed to 0.1 mT EMF (T1 6 hours:
6 h/day for 5 days; T2 20 hours: 20 h/day for 5 days). A significant decrease in the pyramidal cell number was higher
as the exposure duration to EMF was extended (T1, p
Hibiscus sabdariffa Linn. (roselle) is a polyphenol rich fruit. This study aimed to identify the neuroprotective effect of
roselle on LPS-induced cell proliferation and nitric oxide-induced free radical in microglia and neuroblastoma cells.
MTT assay was used to identify the appropriate concentration of roselle and LPS for microglia and neuroblastoma cells
proliferation study. Griess assay were used to determine the level of nitric oxide accumulated based on the reaction of
Griess to estimate the activity of iNOS in nitric oxide production. The results showed that roselle at the concentration of
50 μg/mL and 100 μg/mL and LPS at concentration of 1 μg/mL does not give cytotoxic effect towards microglia C8-B4 and
neuroblastoma LN18 cells. The roselle treatment at 50 μg/mL and 100 μg/mL showed a protective effect on LPS-induced
microglia C8-B4 cells. However, in neuroblastoma LN18 cells, no protective effect was seen on both 50 μg/mL and 100
μg/mL of roselle treatment following induction with 1 μg/mL of LPS. On the other hand, the production of nitric oxide
(NO) was reduced when LPS-induced microglia C8-B4 cells were treated with 50 μg/mL of roselle. Treatment of roselle
at concentration 100 μg/mL on LPS-induced neuroblastoma LN18 cells also reduced the production of nitric oxide. As a
conclusion, roselle had the ability to give neuroprotective effect by the inhibition of LPS induction activity on microglia
activation for normal and cancer cells at different concentrations
Tahfiz education has been well accepted by Muslims in Malaysia. Memorizing the Quran through rote learning can assist in improving the brain ability to process, store information and build memory. In addition, dietary intakes were reported to contribute in the process of memorizing the Quran and to increase the levels of intelligence (IQ) among huffaz students. This cross-sectional study was conducted to measure and to determine the correlation between IQ and dietary intake as well as between IQ and the level of trace elements among students in selected tahfiz schools and non-tahfiz school in Selangor. Questionnaires were used to obtain demographic data. Dietary intake was assessed via 3 days dietary record. Levels of trace elements in the nail samples were analyzed by using ICP-MS. Test for intelligence using WASI-II was conducted to measure the students’ IQ. The results showed that there was a moderate positive correlation between IQ and carbohydrate (r = 0.425, p < 0.001, a weak positive correlation between IQ and energy (r = 0.260, p < 0.05), vitamin B6 (r = 0.189, p < 0.05), vitamin B12 (r = 0.207, p < 0.05) and vitamin C (r = 0.211, p < 0.05). The levels of trace elements in nail samples showed no correlation with IQ, whereas there were moderate positive correlations between IQ and dietary zinc (r = 0.375, p < 0.001) as well as between IQ and dietary iron (r = 0.303, p < 0.001). There was also a moderate positive correlation between IQ and the level of memorization (r = 0.375, p < 0.001). The results of stepwise multiple linear regression showed that al-Quran memorization influence the level of IQ by 20 %. As a conclusion, dietary intake of certain nutrients including energy, vitamins and selected trace elements can potentially improve memorization activities and also IQ.
Kajian terdahulu menunjukkan kualiti hidup dapat ditingkatkan melalui amalan keagamaan dan kerohanian. Hafazan al-Quran merupakan amalan keagamaan dan kerohanian yang memperkasa aspek mental dan fizikal. Namun, kajian saintifik yang mengaitkan hafazan al-Quran dengan kualiti hidup masih terhad terutamanya dalam konteks pelajar tahfiz. Maka, kajian ini bertujuan untuk mengenal pasti hubungan antara hafazan al-Quran dengan kualiti hidup dalam kalangan pelajar tahfiz di Selangor, Malaysia. Satu kajian keratan rentas telah dijalankan ke atas 116 pelajar dengan pensampelan rawak berstrata dari tiga buah sekolah tahfiz di Selangor. Pelajar tahfiz dikategorikan kepada tiga tahap hafazan berdasarkan jumlah juzuk yang telah dihafaz iaitu Tahap 1 (1-10 juzuk), Tahap 2 (11-20 juzuk) dan Tahap 3 (21-30 juzuk). Borang soal selidik telah digunakan untuk mendapatkan data sosiodemografi dan borang soal selidik Short Form-36 Quality of Life (SF-36) versi Bahasa Malaysia telah digunakan untuk menilai tahap kualiti hidup. Data telah dianalisa menggunakan SPSS versi 23.0. Hasil kajian mendapati wujud hubungan positif yang signifikan antara hafazan al-Quran dengan kesihatan fizikal (r = 0.300, p < 0.05) dan kesihatan mental (r = 0.194, p < 0.05). Ini jelas menunjukkan bahawa semakin banyak pelajar menghafaz al-Quran semakin tinggi tahap kualiti hidup mereka. Faktor yang mempengaruhi kesihatan mental dan fizikal adalah jumlah muka surat hafazan. Kesimpulannya, hafazan al-Quran berpotensi meningkatkan kualiti hidup serta kesihatan mental dan fizikal pelajar tahfiz.
Sekolah tahfiz merupakan institusi yang mengkhususkan pendidikan kepada pelajar yang boleh menghafaz serta mengingati keseluruhan al-Quran. Aktiviti menghafaz al-Quran dengan teknik pengucapan berulang kali akan membantu meningkatkan keupayaan otak untuk memproses, mengingati maklumat dan membina memori. Kehadiran logam berat akan memberi kesan kepada sistem saraf serta mengganggu fungsi sistem saraf pusat dan periferi di mana akan seterusnya menyebabkan berlakunya kecelaan fungsi mental dan kognitif. Keupayaan untuk belajar, mengingati atau menghafaz, penggunaan bahasa dan untuk memahami sesuatu akan terganggu serta mengurangkan IQ dan perhatian. Kajian keratan rentas telah dilakukan bagi mengukur dan mengenal pasti hubungan di antara tahap logam berat, hafazan al-Quran dan tahap kecerdasan (IQ) dalam kalangan pelajar di sekolah tahfiz berbanding sekolah bukan tahfiz terpilih di Selangor. Kepekatan logam berat ditentukan melalui analisa sampel kuku dan rambut pelajar dengan menggunakan Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Ujian kecerdasan Wechsler Adult Intelligence Scale Edisi Kedua (WASI-II) digunakan untuk mengukur IQ pelajar. Borang soal selidik yang digunakan untuk mengumpulkan data demografik dianalisa menggunakan SPSS versi 23.0. Berdasarkan ujian korelasi Pearson yang dilakukan, terdapat korelasi negatif yang sangat lemah tetapi signifikan antara logam mangan dalam sampel rambut dengan tahap hafazan al-Quran (r = -0.178, p = 0.017). Selain itu, terdapat korelasi positif yang lemah tetapi signifikan antara IQ dengan tahap hafazan al-Quran (r = 0.375, p = < 0.001). Kesimpulannya, semakin tinggi kepekatan logam mangan akan menyebabkan penurunan tahap hafazan al-Quran serta apabila semakin tinggi tahap hafazan al-Quran akan menyebabkan tahap kecerdasan (IQ) juga semakin meningkat.