Dhaka University Journal of Pharmaceutical Sciences最新文献

{"title":"Design, Optimization and In vitro Evaluation of Mesalazine 400 mg Delayed Release Tablet for Colon Specific Delivery","authors":"Diponkor Kumar Shill, U. Kumar, Asm Monjur Al Hossain, Dilshad Noor Lira, A. S. Rouf","doi":"10.3329/dujps.v22i2.69325","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.69325","url":null,"abstract":"Ulcerative colitis is a chronic inflammatory disease, and patients would get benefit more if the drug is given directly to the colon. Mesalazine is intended to deliver to the colon for treating ulcerative colitis. Here, we aimed to design and optimize mesalazine 400 mg delayed release tablet for colon-specific delivery using a quality by design (QbD) approach. The tablet was first formulated as an optimized core tablet and then coated with Eudragit S 12.5 for ensuring colonic delivery. The experimental design for the core tablet was constructed using a 32 full factorial design, where the percentages of sodium starch glycolate (SSG) and polyvinylpyrrolidone (PVP K-30) were independent variables and the tablet hardness (kg/cm2) and cumulative percentage of drug release at pH 7.2 phosphate buffer after 1.5 hours were treated as responses. Responses obtained from the initial exploratory formulations were evaluated to develop an optimized formulation to have a hardness value of 7-8 kg/cm2 and the maximum amount of drug release at pH 7.2 buffer. The optimized formulation involved the use of SSG and PVP K-30 at 3.05% and 1.69%, respectively. Hardness and cumulative percent of drug release obtained for the optimized core tablet were 7.8 kg/cm2 and 91.76%, respectively. The compatibility of drug and excipients was studied utilizing XRD, FTIR and TGA. The optimized core tablet was then coated with Eudragit S 12.5 to deliver the drug selectively to the colon and further assessed for its in vitro dissolution. Dissolution studies indicated that coated tablets with a weight gain of 7.4% exhibited the maximum cumulative percent of drug release (91.19 ± 0.11%), with a zero-order drug release profile (R2 = 0.943). A stability study performed according to ICH Q1A (R2) guidelines at accelerated storage conditions identified that there was no significant change in drug content over the storage period, indicating the stability of the formulated tablet batches. Together, these data suggest that the mesalazine tablet developed through the QbD approach offers excellent physical properties and drug release profile and, therefore, could be recommended for commercial manufacturing. Dhaka Univ. J. Pharm. Sci. 22(2): 189-201, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anti-viral Activity of 62 Medicinal Plants, Herbs and Spices Available in Bangladesh: A Mini Review","authors":"Adiba Firuj, F. Aktar, Tahmina Akter, J. A. Chowdhury, A. A. Chowdhury, Shaila Kabir, Sultan Mehtap Büyüker, Md. Shah Amran","doi":"10.3329/dujps.v22i2.67408","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.67408","url":null,"abstract":"Microorganisms can cause devastating diseases leading to a pandemic, such as COVID-19 which has created a devastating situation throughout the world. The SARS-CoV-2 or severe acute respiratory syndrome coronavirus-2 is the major concern for creating this pandemic situation. Viruses are the major pathogenic microorganisms that have the potential to be detrimental to human beings and animals in many ways. By entering the human body through different routes and commanding different machinery of the body to generate a higher number of their genomic copies and proteins they create pathogenesis. Phytomedicines may act as suitable weapons to halt the reproduction of such viruses and combat diseases caused byBangladesh is the habitat of about 500 medicinal and aromatic plants. Many of these plants have been found to show anti-viral activity. The anti-viral activity of Terminalia chebula, a well-known Bangladeshi medicinal plant has been proven to combat Newcastle Disease virus, Herpes Simplex Virus, Adenovirus type 5, Measles virus, Echovirus type 11, Rotavirus, Influenza A virus, Hepatitis B virus and Enterovirus. This review article was aimed to search available medicinal plants as novel anti-viral drugs. Dhaka Univ. J. Pharm. Sci. 22(2): 213-232, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"10 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formulation and Evaluation of Ledipasvir Nano-suspension Through QbD Approach","authors":"Md Rezowanur Rahman, Diponkor Kumar Shill, U. Kumar, Asm Monjur Al Hossain, S. C. Bachar, A. S. Rouf","doi":"10.3329/dujps.v22i2.69324","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.69324","url":null,"abstract":"Ledipasvir, belonging to the BCS class II, is a directly acting anti-viral agent used to treat Hepatitis C virus infections. Due to poor water solubility and oral bioavailability, developing an effective delivery system for this drug has been an enormously challenging issue for the formulators. Moreover, suitable dosage forms for pediatric and geriatric patients and patients having difficulty in swallowing as well pose an added burden. Therefore, the present study aims to formulate a nanosuspension, via a solid dispersion technique, based on liquid oral suspension using the Quality by Design (QbD) method. Primarily, the compatible polymers for Ledipasvir were screened using FT-IR and DSC, and finally, the polymers- poloxamer 188, poloxamer 407, HPC and HMPC were selected, considering their ability to turn the API into amorphous state in solid dispersions. The design of formulation and analysis with the D-Optimal design using Design Expert® Software revealed that poloxamer 188 and poloxamer 407 at 0.3:0.7 ratio of Ledipasvir:Polymer produced the optimized nanosuspension formulations with a statistically significant mathematical model. Subsequently, the formulations were stabilized using a suspension vehicle optimized via Box-Behnken design using the amount of xanthan gum (gm), avicel® RC-591 (gm) and citric acid monohydrate (gm) as independent variables, and viscosity (cp) and zeta potential (mv) as responses. The dissolution profiles revealed that the prepared suspensions of Ledipasvir had much faster dissolution than the market products available as the tablet dosage form. In-vivo simulation studies using PKSolver® suggested that the absorption of the drug from the formulated suspensions was comparable to that of market product up to a single dose level (90 mg) and superseded in triplicate dose level (270 mg). The formulated suspensions were found to be stable over three- and six-month periods, as identified via accelerated stability studies. Interestingly, the dissolution profile of the stabilized suspensions was found to be similar after six months to that of the initial. Dhaka Univ. J. Pharm. Sci. 22(2): 173-188, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"11 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemical and Biological Investigations of Bacopa monnieri L.","authors":"Md Abu Huraira, Muhammad Abdullah Al Mansur, M. Kuddus","doi":"10.3329/dujps.v22i2.67407","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.67407","url":null,"abstract":"Bacopa monnieri L. (Family: Scrophulariaceae), a medicinal herb of Bangladesh, has been used in traditional medicine to increase memory and brain power. The present research was aimed to investigate the phytochemical composition and biological activities of whole plant of B. monnieri. Through phytochemical analysis, two triterpenes, taraxerone and betulinic acid were obtained from B. monnieri. The crude methanol extract of the whole plant of Bacopa monnieri and its petroleum ether, dichloromethane, chloroform and aqueous fractions were screened for determination of several in vitro biological activities. In DPPH assay for antioxidant test, the dichloromethane fraction showed strong DPPH radical quenching activity (IC50 = 3.78 μg/ml). The chloroform fraction exhibited the maximum lethal concentration, LC50 value of 5.5 μg/ml against brine shrimp. In membrane stabilization assay, the crude extract and all solvent fractions revealed significant anti-inflammatory activity by inhibiting hemolysis of RBC induced by both hypotonic solution and heat. In thrombolytic assay, the petroleum ether fraction demonstrated highest thrombolytic activity (39.24%), when compared to the standard streptokinase (64.22%). In antimicrobial screening, the chloroform fraction displayed reasonable activity against most of the tested microorganisms. This study concludes that B.  monnieri has potential antioxidant, anti-inflammatory and thrombolytic activities. Dhaka Univ. J. Pharm. Sci. 22(2): 155-161, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"79 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation, Molecular Characterization, Optimization and Purification of Amylase Enzyme from Locally Isolated Bacillus Species in Different Regions of Munshiganj, Bangladesh","authors":"Md. Fuadh-Al-Kabir, Julia Ferdouse, A.N.M. Hamidul Kabir","doi":"10.3329/dujps.v22i2.67406","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.67406","url":null,"abstract":"Amylase is a kind of enzyme that facilitates the breakdown of carbohydrates in the body. This enzyme has many applications in different industries. Generally, in pharmaceutical sector it is used for the treatment of pancreatic disorder, pancreatic enzyme replacement therapy (PERT) and as a digestive aid. In this study, the bacterial strain was isolated from soil samples collected from potato dumpsites in different areas of Munshiganj, Bangladesh. After subculturing on the nutrient agar plate, 31 colonies were obtained, of which 9 isolates were found as amylase producer on starch agar medium. Of these, 2 isolates (MC-04 and MC-15) were selected based on the starch hydrolysis clear zone ratio. The isolate MC-04 showed crude enzyme activity of 2.82 IU/ml and specific enzyme activity of 3.42 IU/mg, and isolate MC-15 showed crude enzyme activity of 3.16 IU/ml and specific enzyme activity of 3.77 IU/mg. The best isolate, MC-15, was then identified by morphology, biochemical and molecular characterization and confirmed by 16S-rRNA gene sequencing. After 16S-rRNA sequencing, the isolate (MC-15) was identified as Bacillus subtilis. This amylase production of this strain had also been optimized under certain conditions such as different incubation periods, pH, temperatures and different carbon sources. We found that the best incubation period was 48 h, the optimum pH-7.0, the optimum temperature at 40°C and 2% starch was considered as the best source of carbon. Finally, the crude amylase enzyme was purified by precipitation with ammonium sulfate, dialysis, and single-step gel filtration chromatography. The enzymatic activity of the purified amylase was found to be 8.91 IU/ml, that was 2.82-fold greater enzymatic activity than the raw enzyme. The experiments confirmed that Bacillus subtilis may be a good source of amylase enzyme for industrial application in Bangladesh. Dhaka Univ. J. Pharm. Sci. 22(2): 147-154, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"15 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Cross-sectional Study on Caffeine Dependency by Drinking Tea and Coffee Among Bangladeshi Students","authors":"A. T. Munia, Saif Bin Salam Bondhon, Md Raihan Sarkar, Rabita Rahman, K. Sikdar, Md Abdus Samadd","doi":"10.3329/dujps.v22i2.69326","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.69326","url":null,"abstract":"Too much caffeine consumption might cause physical and mental dependency on the consumer. This study examined the socio-demographic factors, knowledge, behavior, and perception of Bangladeshi students about caffeine which is based on drinking tea and coffee.  This questionnaire-based study included 1020 respondents from primary level to postgraduate level students.  The analysis utilized frequencies, means, percentages, Pearson's chi-square (χ2) statistic and Spearman's rank correlation coefficients. Pearson's chi-square (χ2) statistic test was performed to determine the significance at 5% with a p-value < 0.05. Most of the students (94.8%) consume tea or coffee regularly, and 66.1% drink it daily. A total of 87.5% of students knew that tea and coffee have caffeine. Nearly two-thirds (67.1%) of the students were dependent on tea and coffee, and 35.9% experienced psycho-physiological alterations after a day without drinking those items. About 38% of students noticed side effects after consumption of tea or coffee multiple times in a day. This study also reveals that gender did not alter the knowledge or drinking behavior of tea and coffee. Tea and coffee drinking patterns were not significantly dependent upon the participants’ educational qualifications. Dhaka Univ. J. Pharm. Sci. 22(2): 202-212, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"74 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139157169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In vitro and In vivo Interaction of Ketorolac Tromethamine and Cefixime Trihydrate","authors":"Mokaddas Flora, Rafat Tahsin, J. A. Chowdhury, Shaila Kabir, Md. Shah Amran, A. A. Chowdhury","doi":"10.3329/dujps.v22i2.67405","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.67405","url":null,"abstract":"Drug-drug interaction, a major impediment towards safe and effective pharmacotherapy, often leads to adverse outcome or therapeutic failure if not properly identified. The present study employed a number of in vitro and in vivo methods to conduct a thorough investigation of the interaction potential between ketorolac tromethamine (nonsteroidal anti-inflammatory drug) and cefixime trihydrate (beta-lactam antibiotic). UV-Visible spectrophotometry, FTIR and DSC were carried out to analyze the interaction of ketorolac and cefixime in vitro. UV-visible spectrophotometric study at different pH showed hyperchromic shift and blue shift (hypsochromic shift) in the mixture of the studied drugs compared to ketorolac alone. In contrast, only hyperchromic shift was found in the mixture when compared to cefixime alone. In DSC study, the melting endotherm of ketorolac tromethamine shifted from 169.62°C to 149.99°C in the 1:1 mixture. Again, the FTIR spectrum showed that in 1:1 mixture, the lactam (C=O) band of cefixime trihydrate shifted from 1771.68 cm-1 to 1718.63 cm-1, the amide carbonyl band (-CONH) moved from 1669.45 cm-1 to 1616.4 cm-1 and the -OH band moved from 3296.46 cm-1 to 3397.72 cm-1 which might be indicative of interaction between these two drugs. The in vivo study in rat model was designed to determine whether cefixime has any significant impact on the analgesic activity of ketorolac. In vitro  antimicrobial effect was also performed to evaluate the effect of ketorolac on cefixime. The findings from these study suggested that neither ketorolac nor cefixime imparted any deleterious impact on the biological property of each other which might indicate that co-administration of ketorolac and cefixime are therapeutically effective and safe. Dhaka Univ. J. Pharm. Sci. 22(2): 137-146, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"86 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isolation and Characterization of Alkaline Proteases Producing Indigenous Bacillus sp. as a Source of Thrombolytic and Fibrinolytic Agents","authors":"T. Akhtar, M. A. A. Sikder, Tania Yeasmin, Md Arafat Al Mamun, M. Hoq, Md Mustafizur Rahman, Md Rashedul Haque, Md Abdul Mazid","doi":"10.3329/dujps.v22i2.67404","DOIUrl":"https://doi.org/10.3329/dujps.v22i2.67404","url":null,"abstract":"Fibrinolytic enzymes derived from bacteria can be effective as a potent, safe and cost-effective thrombolytic agent for the prevention and treatment of cardiovascular diseases. In this study, microorganisms were isolated from various soil samples and screened for their protease activity and protein concentration. Isolates with higher protease activity were subsequently tested for their thrombolytic and fibrinolytic activity. Of a total 37 isolates, 7 exhibited significant zone in SMA media (zone ratio above 1.3). Of these, 8 isolates showed increased protease activity with values ranging from 120 to 199 U/ml. The highest protease activity was observed for the isolate GST12 obtained from mung bean (green gram) soil. The freeze-dried concentrated crude enzymes were screened by in vitro clot lysis method. Six of these eight concentrated enzymes demonstrated clot lysis above 20%, whereas, enzymes from GST12 and GST21 exhibited the highest clot lysis activity (about 27%), which is comparable with standard drug streptokinase. These two enzymes are also strongly associated with fibrinolytic activity. Our findings identify 8 isolates having potential thrombolytic and fibrinolytic activities that belong to Gram-positive Bacillus. Dhaka Univ. J. Pharm. Sci. 22(2): 125-135, 2023 (December)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"82 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Annulenol from Aconitum heterophyllum with Bioactivity and Cytotoxicity against Vero and Lung Cell Line","authors":"Md. Saiful Alam, S. Rony, F. Afroz, Abdullah Al Mansur, S. Sharmin, F. Moni, S. Akhter, M. M. Hussain, M. Sohrab","doi":"10.3329/dujps.v22i1.64141","DOIUrl":"https://doi.org/10.3329/dujps.v22i1.64141","url":null,"abstract":"In this research work, a detailed phytochemical and biological investigation of Aconitum heterophyllum was accomplished. The cold methanolic root extract of A. heterophyllum was subjected to VLC for fractionation over silica gel, which led to the isolation of two compounds 1,1,8,8-trimethyl-4-methylene-decahydro- 1H-cyclopenta-[8]-annulen-1-ol (1) and β-stigmasterol (2). The compounds were characterized by analysis of their 1D and 2D NMR spectral data. Compound 1 is first reported from this plant. The crude extract was screened for antimicrobial activity against several gram-positive and gram-negative bacteria, and fungi using disk diffusion method where significant inhibitory activity was observed. The extract was also tested for cytotoxic property using brine shrimp lethality bioassay, which revealed moderate activity in comparison with the standard anticancer drug, vincristine sulphate. Antioxidant property of the crude methanol extract of A. heterophyllum was determined by the scavenging of the DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical and found moderate antioxidant activity (IC50 = 53.25 μg/mL) when compared to standard antioxidant. Total phenolic and flavonoid content and polyphenolic compound content of the crude extract were determined by HPLC. The isolated compounds 1 and 2 showed dosedependent antiproliferation activity against the vero and lung A549 cells.\u0000Dhaka Univ. J. Pharm. Sci. 22(1): 1-10, 2023 (June)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79446512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biological Investigations of Three Marine Algae Enteromorpha intestinalis, Rhizoclonium riparium and Ceratophyllum demersum Collected from the Bay of Bengal","authors":"Md Hanif Biswas, Nasiba Binte Bahar, N. Sharmin, Shiekh Zahir Raihan, S. Halder, Mir Shariful Islam, M. A. Muhit","doi":"10.3329/dujps.v22i1.67098","DOIUrl":"https://doi.org/10.3329/dujps.v22i1.67098","url":null,"abstract":"The ocean consists of versatile domain of lives which can be exploited for human health benefits because of diversified secondary metabolites. Seaweeds, generally called macroalgae, are commonly found in the coastal region of the Bay of Bengal. But none of them were investigated properly for their biological activities. Hence, this study was performed to investigate the antioxidant, antimicrobial, cytotoxic and membrane stabilizing activities along with total phenolic content of the crude methanolic extract of three seaweeds namely, Enteromorpha intestinalis, Rhizoclonium riparium and Ceratophyllum demersum using standard protocols. Among the methanolic extracts of three seaweeds, C. demersum (52.09 ± 1.30 mg of GAE) was found to have the highest phenolic content, followed by E. intestinalis (35.98 ± 1.27 mg of GAE) and then R. riparium (29.94 ± 0.54 mg of GAE). The extractives of these seaweeds also showed promising antioxidant and membrane stabilizing properties compared to the standard. E. intestinalis extract displayed greater reducing power with increasing concentration (EC50 value 7.70 ± 0.27 μg/ml). The same seaweed E. intestinalis was found to have significant free radical (DPPH) scavenging potential (IC50 value 23.46 ± 0.54 μg/ml) compared to the reference standard ascorbic acid (IC50 value 5.76 ±0.13 μg/ml). However, the findings of antimicrobial activity test demonstrated mild antibacterial effects of these seaweeds against Escherichia coli and Aspergillus niger and none of these seaweeds exhibited cytotoxicity when tested against HeLa cell line. These findings will aid in future studies attempting to explore medicinal and therapeutic agents from these readily available seaweeds of Bangladesh. Dhaka Univ. J. Pharm. Sci. 22(1): 81-87, 2023 (June)","PeriodicalId":11304,"journal":{"name":"Dhaka University Journal of Pharmaceutical Sciences","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81230367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}