Riaz Uddin

HPLC-Analysis of Polyphenolic Compounds in Gardenia jasminoides and Determination of Antioxidant Activity by Using Free Radical Scavenging Assays

PURPOSE Gardenia jasminoides is a traditional medicinal plant rich in anti-inflammatory flavonoids and phenolic compounds and used for the treatment of inflammatory diseases and pain. In this present study, antioxidant potential of Gardenia jasminoides leaves extract was evaluated by using various antioxidant assays. METHODS Various antioxidant assays such as 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay, reducing power and total antioxidant capacity expressed as equivalent to ascorbic acid were employed. Moreover, phenolic compounds were detected by high-performance liquid chromatography (HPLC) coupled with diode-array detection. RESULTS The methanol extract showed significant free radical scavenging activities in DPPH radical scavenging antioxidant assays compared to the reference antioxidant ascorbic acid. Total antioxidant activity was increased in a dose dependent manner. The extract also showed strong reducing power. The total phenolic content was determined as 190.97 mg/g of gallic acid equivalent. HPLC coupled with diode-array detection was used to identify and quantify the phenolic compounds in the extracts. Gallic acid, (+)-catechin, rutin hydrate and quercetin have been identified in the plant extracts. Among the phenolic compounds, catechin and rutin hydrate are present predominantly in the extract. The accuracy and precision of the presented method were corroborated by low intra- and inter-day variations in quantitative results in leaves extract. CONCLUSION These results suggest that phenolic compounds and flavonoids might contribute to high antioxidant activities of Gardenia jasminoides leaves.

Beneficial Role of Bitter Melon Supplementation in Obesity and Related Complications in Metabolic Syndrome

Diabetes, obesity, and metabolic syndrome are becoming epidemic both in developed and developing countries in recent years. Complementary and alternative medicines have been used since ancient era for the treatment of diabetes and cardiovascular diseases. Bitter melon is widely used as vegetables in daily food in Bangladesh and several other countries in Asia. The fruits extract of bitter melon showed strong antioxidant and hypoglycemic activities in experimental condition both in vivo and in vitro. Recent scientific evaluation of this plant extracts also showed potential therapeutic benefit in diabetes and obesity related metabolic dysfunction in experimental animals and clinical studies. These beneficial effects are mediated probably by inducing lipid and fat metabolizing gene expression and increasing the function of AMPK and PPARs, and so forth. This review will thus focus on the recent findings on beneficial effect of Momordica charantia extracts on metabolic syndrome and discuss its potential mechanism of actions.

Effects of arsenic toxicity beyond epigenetic modifications

Worldwide chronic arsenic (As) poisoning by arsenic-contaminated groundwater is one of the most threatening public health problems. Chronic inorganic As (inAs) exposure has been associated with various forms of cancers and numerous other pathological effects in humans, collectively known as arsenicosis. Over the past decade, evidence indicated that As-induced epigenetic modifications have a role in the adverse effects on human health. The main objective of this article is to review the evidence on epigenetic modifications induced by arsenicals. The epigenetic components play a crucial role in the regulation of gene expression, at both transcriptional and posttranscriptional levels. We synthesized the large body of existing research on arsenic exposure and epigenetic mechanisms of health outcomes with an emphasis on recent publications. Changes in patterns of DNA methylation, histone posttranslational modifications, and microRNAs have been repeatedly observed after inAs exposure in laboratory studies and in studies of human populations. Such alterations have the potential to disturb cellular homeostasis, resulting in the modulation of key pathways in the As-induced carcinogenesis. The present article reviews recent data on As-induced epigenetic effects and concludes that it is time for heightened awareness of pathogenic arsenic exposure, particularly for pregnant women and children, given the potential for a long-lasting disturbed cellular homeostasis.

Irrational U se of Antibiotics and Antibiotic Resistance in Southern Rural Bangladesh: Perspectives from Both thePhysicians and Patients

Aims: Antibiotic resistance is one of the widely recognized public health challenges in Bangladesh. The present study was aimed to analyze the current status of irrational use of antibiotics in rural Bangladesh and to explore the views from both physicians’ and patients’ perspective. Study Design: Population based survey. Place and Duration of Study: The survey was conducted among 6,000 patients and 580 physicians in the rural areas of Dhaka and Rajshahi divisions of Bangladesh from July 2012 to December 2012. Methodology: The survey followed a face-to-face interview protocol. 24 Upazila Health Complexes and 112 Union Health Centers of Dhaka and Rajshahi divisions were conveniently surveyed by trained volunteer interviewers. Two separate survey questionnaires were developed for physician and patient survey. Results: From the physician survey it was found that significantly more doctors prescribe antibiotics in suspected infections (P<.0001). Around forty-four (44.1) percent doctors prescribe antibiotics in cold and fever before diagnosis. A significant proportion of physicians never receive any feedback about the antibiotic they prescribe (31.9%, P<.0001) and more than 50% doctors claimed that they receive feedback occasionally, not always (P<.0001). According to the physician’s patient non-compliance is the main cause of antibiotic resistance in the country (68.8%). Though 48.6% patients think that it is important to strictly follow the doctor’s prescription, a significant percentage believe that it is not always necessary (26.7%, P<.0001) and more than 50% patient stop taking the antibiotic as soon as the symptoms disappear, while only 25.2% patient complete their full course. Only 6.3% patients consult their doctor if they miss the dose of an antibiotic and more than 50% take the next dose on time (P<.0001). When a drug does not work the patient usually consider the doctor is incompetent (25.6%) and many (24.5%) believe that the quality of the drug is not up to the mark. Conclusion: The result of this survey indicates that the antibiotics are used among the rural people in irrational way. To overcome this situation close supervision of the relevant authority is required in order to minimize the growing antibiotic resistance in Bangladesh.

Awareness regarding the importance of calcium and vitamin D among the undergraduate pharmacy students in Bangladesh

BackgroundCalcium and vitamin D are two important micronutrients required for maintaining proper bone health. Previous works intended to determine the status of these micronutrients in local population have reported that the people in Bangladesh are at high risk of calcium insufficiency and hypovitaminosis D related health complications. Lack of awareness and insufficient knowledge of the essentiality of these two nutrients are assumed to cause this problem in Bangladesh. The present study was designed and conducted to establish a basic understanding on the level of gap of knowledge and awareness among pharmacy students at undergraduate level in Bangladesh.FindingsA total of 713 students of Bachelor of Pharmacy course participated in the study. The students were asked about basic idea related to calcium and vitamin D and the disorders due to their deficiency, name of common foods containing calcium and vitamin D, their perception regarding the essentiality of the said nutrients etc. It was found that most of the students were familiar with the importance of calcium (98.9%) and vitamin D (99.3%) in bone health. 82.2% students know about the term osteoporosis. Unfortunately, 10.7% and 18.8% students failed to mention at least one food that is rich in calcium and vitamin D, respectively. Most of the students got familiar about the nutrients from their teachers (48.9%) and textbooks (32.8%).ConclusionBeing a student of pharmacy, the students should have more comprehensive knowledge about calcium and vitamin D. The present study indicates that the pharmacy students have lack of knowledge about calcium and vitamin D and thus it can be clearly predicted that the condition of general people may be worse.

Self-medication among medical and pharmacy students in Bangladesh

BackgroundThis cross-sectional survey examined the pattern of self-medication and factors associated with this practice among medical and pharmacy students in context to Bangladesh.MethodsThe study used a self-administered questionnaire. A total of 500; 250 medical and 250 pharmacy, students participated in the study. As it is a comparative analysis between the medical and pharmacy students, we used independent t test and Chi square test.ResultsThe findings indicated that the impact of self-medication is almost similar in medical and pharmacy students. It was found that medical students were more careful about getting advice from a physician or seeking professional help from some healthcare personnel. About the safety of self-medication pharmacy students were more aware than medical students were. The study also showed that female and younger medical or pharmacy students were more aware about self-medication.ConclusionsThe current study presents a comprehensive picture of self-medication in medical and pharmacy students in Bangladesh. It is clear from the findings that practice of self-medication is highly prevalent in medical and pharmacy students in the country. This may potentially increase misuse or irrational use of medicines.

Arsenic, the poison and poisoned groundwater of Bangladesh: A review.

© 2011 Uddin et al.; licensee Saki Publishing Club. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nd/3.0/), which permits unrestricted use (including commercial use), distribution and reproduction of the work in any medium, provided the original work is properly cited and remain unaltered.

In vitro Anti-oxidant Activity and HPLC-DAD System Based Phenolic Content Analysis of Codiaeum variegatum Found in Bangladesh.

PURPOSE This study evaluated the in vitro antioxidant potential of two varieties of Codiaeum variegatum leaves (spiral (CP) and royal like (BP)) extracts. METHODS The different antioxidant assays, including DPPH free radical scavenging, nitric oxide scavenging, hydrogen peroxide, reducing power, total antioxidant activity, protection of lipid peroxidation and RBC membrane stabilization activity, were studied. Moreover, high-performance liquid chromatography (HPLC) coupled with diode-array detection was used to identify and quantify the phenolic compounds in the royal like (BP) leaves extract. RESULTS Codiaeum variegatum extracts showed effective DPPH free radical scavenging, hydrogen peroxide radical scavenging and nitric oxide scavenging activity. However, reducing power of ferric ion was not significant compared to the standard antioxidant activity. In addition, Codiaeum variegatum extracts exhibited protection against lipid peroxidation. The total antioxidant activity was increased dose dependently when compared with standard drug ascorbic acid. (-)-Epicatechin, p-coumaric acid, rutin hydrate and ellagic acid were identified in the extract. Among the phenolic compounds, ellagic acid was abundantly present in the extract. CONCLUSION Our investigation suggests that Codiaeum variegatum leaves contain high amount of phenolic compounds which may responsible for its biological activities in folkloric medicine.

Calcium and Vitamin D Related Knowledge in 16-18 Years Old Adolescents: Does Living in Urban or Rural Areas Matter?

Background: Vitamin D deficiency is very common in Bangladesh. However, there is scanty of literature available about the knowledge of calcium and vitamin D in 16-18 years old adolescents. The present study has been conducted to determine whether a lack of knowledge exists in this age group about these nutrients and to find out the correlation between students’ living in urban or rural areas. Methods: We conducted a cross sectional survey in 2992 students living in urban (62.6%) and rural (37.4%) areas aged between 16-18 years. We followed a 2 step sampling technique. 6 colleges from both urban and rural areas were selected by convenience of the interviewers and then required sample size was calculated from the number of students of each college. The students filled up a questionnaire after a detailed briefing about the study by the interviewer. Result: We found that many of the students, both from urban and rural settings have lack of knowledge and awareness of calcium and vitamin D. Our data suggest that though the rural students are less familiar with vitamin D (p<0.001) and osteoporosis (p=0.0056) than urban students, they exercise a healthy diet in terms of milk consumption (p<0.0001) and engage themselves more in outdoor activities, spend more time in sunlight (p<0.0001) than the urban students. Thus the rural students may require less supplemental support of calcium and/or vitamin D than the urban students (p<0.0001). Conclusion: Urban students are more familiar with the nutrients than the rural students but rural students’ lifestyle, diet and food habit may allow them to get a healthier nutritional support and thus to have a better nutritional health than urban students.