Pharmaceutics and Drug Design Commons^™

Orchestrating Cytosolic Access: The Partnership Of Cationic Lytic Peptide L17e And Potassium Channel Kca3.1, Keykavous Parang

Pharmacy Faculty Articles and Research

In this issue of Molecular Therapy, the study by Kuriyama et al.¹ represents an advance in the field of intracellular delivery systems by elucidating a novel mechanism for cytosolic delivery mediated by a cationic amphiphilic lytic peptide L17E (IWLTALKFLGKHAAKHEAKQQLSKL-amide). The investigators demonstrate that the peptide achieves cytosolic delivery primarily through transient plasma membrane disruption, bypassing some of the endocytic pathways, and highlight the pivotal role of the calcium-activated potassium channel KCa3.1, encoded by the gene KCNN4, in facilitating this process. These findings offer a deeper understanding of peptide-mediated delivery using a potassium channel and raise intriguing questions about …

Folic Acid-Decorated Lipidic Nanocapsules Co-Loaded With Atorvastatin And Curcumin To Enhance Glioma Targeting In Mice, Mahitab Bayoumi, John Youshia, Osama Abdelkawy, Sara Abdelgaber, Mona Arafa, Maha Nasr, Omaima Sammour

Pharmacy

Background: Glioma remains an intractable and highly aggressive brain tumor, mainly due to the daunting obstacle presented by the blood-brain barrier (BBB). To overcome this challenge and enhance therapeutic efficacy, a dual-drug delivery system was engineered. This system co-encapsulated curcumin, a nutraceutical with multitargeted anticancer potential, with atorvastatin calcium, a repurposed anticancer agent, within lipidic nanocapsules (LNCs). Methods: LNCs were prepared via the phase inversion temperature method and optimized using a Box–Behnken design. The optimized LNCs were subsequently functionalized with folic acid (FA) to enable active targeting. FA-LNCs were characterized using, XPS, TEM, in vitro release, and MTT cytotoxicity …

Investigating The Bioactivity Potential And Standardization Of Two Stingless Bee Propolis From East Kalimantan, Paula Mariana Kustiawan, Muhammad Ali Syahbana, Rika Pratika, Muhammad Nor Ichsan, Ika Ayu Mentari, Indah Hairunnisa, Irfan Muris Setiawan, Putri Hawa Syaifie, Donny Ramadhan, Chanpen Chanchao

Pharmaceutical Sciences and Research

The standardization of raw materials from nature is essential before they are made into products. Until now, there is still limited information regarding the standardization of propolis from stingless bees. This research aims to determine the bioactivity with standardized specific and non-specific parameters of ethanol extracts from Homotrigona apicalis and Homotrigona fimbriata propolis. The methods include organoleptic tests, tests for water-soluble and ethanol-soluble compound content, drying shrinkage tests, specific gravity tests, water content tests, metal contamination tests, phytochemical screening, and determining total phenolic and flavonoid content. The free radical scavenging capacity was measured using the DPPH (1,1-diphenyl-2-picrylhydrazyl) method, and antimicrobial …

Optimization Of External Disintegrating Materials In Wet Granulation Formulation Of Ondansetron Tablets, Yandi Permana, Syahrul Tuba, Taufik Riyadi, Sugindro Sugindro

Pharmaceutical Sciences and Research

Inadequate management of chemotherapy-induced side effects, including nausea and vomiting, can impact the healing response of cancer patients. Ondansetron, a preferred medication for the treatment, is classified as a biopharmaceutic classification system (BCS) class II drug, which limits its bioavailability. To enhance its solubility, sodium starch glycolate (SSG) and pregelatinized starch (PG) are used as super disintegrants. This study investigates the impact of these super disintegrants on ondansetron dissolution and identifies the optimal formulation. Ondansetron tablets were prepared using the wet granulation method, with nine formulations varying in SSG and PG concentrations (0%, 1%, 3%, 5%, and 7%). The tablets …

Utilizing Water Hyacinth (Eichhornia Crassipes) From Srandakan Bantul, Indonesia For ‘Bright Fever Patch’ As An Alternative Children’S Fever Therapy, Anggita Kamalia Niswara, Nabillah Ainun Kusrinanti, Rizqi Amalia Firdaus, Azis Ikhsanudin

Pharmaceutical Sciences and Research

In 2022, Indonesia experienced a public health crisis involving acute kidney failure in children, traced to paracetamol syrup contaminated with ethylene glycol and diethylene glycol. This underscores the urgent need for safer antipyretic alternatives. This study investigates the antipyretic potential of transdermal patches formulated with ethanol extract of water hyacinth (Eichhornia crassipes) leaves sourced from Srandakan, Bantul, Yogyakarta. Extract concentrations of 0.8%, 1.0%, and 1.2% were tested, alongside a negative control (no extract) and a positive control (paracetamol). The patches underwent evaluations for organoleptic properties, weight uniformity (0.41±0.02 to 0.52±0.02 g), thickness (0.36±0.03 to 0.41±0.03 mm), water absorption …

Advancing Continuous Manufacturing: The Role Of Process Analytical Technology In Process Development, Samuel R. Henson

Electronic Theses and Dissertations

The pharmaceutical industry is actively pursuing technologies which improve manufacturing processes with the goal of producing high-quality pharmaceutical products for patients, manifesting in an industry-wide investment in continuous manufacturing (CM). Process analytical technology (PAT) has been recognized for its successful monitoring of critical quality attributes during routine production and is often cited alongside CM due to its ability to make timely, in-line measurements of intermediate materials. Various PAT tools are valuable in process development, particularly as continuous wet granulation processes are developed for use within pharmaceutical manufacturing. This work applied PAT and chemometric modeling during CM process development to enhance …

Formulation And Characterization Of Biologics – From Sirna To Monoclonal Antibodies, Chinmay M. Jogdeo

Theses & Dissertations

Biologics are a rapidly growing class of therapeutics, encompassing a wide range of modalities, with gene therapy products and monoclonal antibodies (mAbs) constituting the majority. Proper formulation and characterization of these complex therapeutics is crucial to ensure their safety and therapeutic efficacy.

This dissertation focuses on two main areas: the development of a novel renal-targeted siRNA delivery system and the assessment of structural and conformational stability of mAbs in a simulated subcutaneous (SC) environment.

The first part of this dissertation presents the synthesis and characterization of a novel renal-targeted polymer for selective siRNA delivery to injured kidneys. Inulin was modified …

Tension Recordings From Primary Bronchi In Acta2-Gcamp8.1-Mvermilion Transgenic Mice, Qais Khalaf, Srijit Ghosh, Keith Thornbury

SURE Journal: Science Undergraduate Research Experience Journal

Contractions in smooth muscle cells are initiated by elevation of cytosolic Ca²⁺. It is of interest to measure Ca²⁺ signals in these cells. Transgenic Acta2-GCaMP8.1-mVermilion (GCaMP) mice express a genetically encoded intracellular fluorescent Ca²⁺ indicator in smooth muscle cells, have been developed to facilitate the study of Ca²⁺. However, there is a concern that the GCaMP Ca²⁺ indicator might buffer Ca²⁺ and interfere with the signals it is designed to measure. Therefore, the aim of this study was to compare tension responses in GCaMP and wild type (WT) mice to determine if …

Synthesis Of Photocleavable Molecules For Neurological Applications, Nishal Madujith Egodawaththa Arachchilage Don

Theses and Dissertations

In recent biomedical research, the precise control of molecular dynamics through light activation has emerged as a powerful tool, particularly in the field of neurobiology. This approach involves the use of photocleavable cages or photoprotective groups (PPGs) that are chemically tethered to biologically active molecules such as neurotransmitters or calcium chelators. These cages remain inert until exposed to specific wavelengths of light, typically in the visible range, triggering the release of the active compound with high spatiotemporal precision.

For neurotransmitter systems, such as glutamate (Glu), which plays a critical role in synaptic transmission and memory formation, researchers have developed novel …

Harnessing The Potential Of Several Local Indonesian Tuber-Derived Starches As Pharmaceutical Excipients, Ronald Horison, Silvia Surini

Pharmaceutical Sciences and Research

Starch is one of the widely required excipients in pharmaceutical dosage forms manufacturing. Indonesia’s rich biodiversity, encompassing tubers like arrowroot, taro beneng, porang, ganyong and yams, harbours the potential for novel starch excipient sources. These tubers provide starch variations with distinct functional properties influenced by the natural starch granules’ properties and amylose-amylopectin ratio. Previous research utilizing natural and modified starches from these tubers has demonstrated their potential in pharmaceutical formulation. These starch tubers have been studied and provided promising results in tablet formulation and film development. Additionally, they could be involved in developing more advanced dosage forms, such as starch …

A Review Of 3d Printing Technology In Drug Design Applications, Hasanain Shakir Mahmood, Jinan M. Al-Mousawy, Jamal Ali Ashoor, Ashti M.H. Saeed, Alaa Abdul Razzaq Al-Nuaimi, Pegah Khosravian

Maaen Journal for Medical Sciences

Sustainable technologies such as Additive manufacturing or three-dimensional printing (3D printing) have resulted in drastic changes in a number of industries including healthcare and pharmaceuticals. The current review focuses on the achievements accomplished on the effectiveness of three-dimensional printing in the field of drug designing and development. This technology is very precise and can be customized and that gives a way of developing complicated drug delivery systems and individualized medications. Promising areas of focus are the development of particular formulations of medicinal preparations, identification of new approaches to the drug release and potential creation of specific drug production for specific …

Molecular Targets For Breast Cancer Therapy, Hamidreza Montazeri Aliabadi

Pharmacy Faculty Articles and Research

"Breast cancer is by far the most common cancer in women, and for a while, it surpassed lung cancer as the most diagnosed cancer, regardless of gender, in 2020 [1]. Chemotherapy and hormone therapy are still the first line of treatment, despite extensive research in molecularly targeted drugs. Therefore, triple negative breast cancer (TNBC) is still known as the most challenging type for treatment due to the limited identified targets. Inherent and acquired resistance are still major hurdles in breast cancer therapy, which further highlights the importance of identifying new molecular targets in this battle. The inherent resistance of unresponsive …

Taste Masked Of Eplerenone Using Egg Box Method, Asmaa Mohammed Rashid

Maaen Journal for Medical Sciences

Eplerenone is a selective mineralocorticoid receptor antagonist employed to manage hypertension, central serous retinopathy, and chronic heart failure. It has a highly bitter taste, which reduces patient compliance with the drug.

The aim of this study was masking the very bitter taste of the eplerenone to improve patient compliance especially for geriatric patient.

The medication was encapsulated utilizing the ionic gelation process, in which a 1% w/w sodium alginate solution was utilized to form egg box structures.Two different concentrations of CaCl2 (0.5.1%w/v) were used as cross-linkers, and different drug: polymer ratios were tested. The formulas were evaluated based on their …

Challenges And Future Perspective Of Gastroretentive Mucoadhesive Dosage Forms, Rayhan Akbar, Heri Setiawan, Baitha Palanggatan Maggadani, Raditya Iswandana, Kurnia Sari Setio Putri

Pharmaceutical Sciences and Research

Gastroretentive Mucoadhesive Dosage Form (GMDF) is one type of Gastroretentive Drug Delivery System (GRDDS) technology designed to exploit the adhesiveness of dosage forms in the gastric mucosa. This aims to increase drug residence time, enhance drug solubility and absorption, and ultimately improve drug bioavailability and therapeutic effect. Various studies have explored the use of different polymers to develop GMDF systems and dosage forms. However, despite extensive research in this field, there are still limited GMDF products approved by the US FDA and INA FDA. Therefore, this review addresses the challenges in developing GMDF, its current state, and potential future opportunities. …

Application Of Pvp Va 64 And Poloxamer 188/407 In Solid Dispersion Technology For Improving Solubility Of Valsartan, Sulastari Cahyani, Teuku Nanda Saifullah Sulaiman, Marlyn Dian Laksitorini

Pharmaceutical Sciences and Research

Valsartan, Biopharmaceutical Classification System (BCS) class II drug, exhibits pH-dependent solubility in the gastrointestinal tract, which increases at pH levels above 5. Its low solubility results in a bioavailability of only 23%, necessitating efforts to enhance it. This study aims to improve the solubility of valsartan using a solid dispersion system. Polyvinylpyrrolidone/vinyl acetate 64 (PVP VA 64), a hydrophilic polymer, was incorporated to inhibit the recrystallization of valsartan, while poloxamer 188 and poloxamer 407, used as surfactants, aimed to enhance valsartan’s solubility and intrinsic dissolution rate. Valsartan solid dispersions were prepared using the spray drying method, and the optimal formulation …

Biosynthesis Of Agnps Mediated By Equisetum Debile Roxb. Herb Water Extract And Its Potency As An Antioxidant, Yuni Retnaningtyas, Alviani Dwi Karmilasari, Endah Puspitasari

Pharmaceutical Sciences and Research

Silver nanoparticles (AgNPs) are metal nanoparticles currently under development. AgNPs are recognized for their remarkable stability, low reactivity, and advantageous biological properties, including antioxidant activity. Phenolic compounds derived from the Equisetum debile Roxb. (Ed-R) herb have the potential to be explored as bio-reduction and capping agents in the synthesis of silver nanoparticles. The primary objective of this study is to synthesize AgNPs using a water extract from Ed-R herb and to assess their antioxidant activity. The optimal composition for the biosynthesis of AgNPs comprises 10% Ed-R water extract, 8.0 mM AgNO₃, and deionized water in a ratio of …

Pharmacokinetics And Tissue Distribution Of A Lipid-Based Extended-Release Nano-Formulation Of Mo-Oh-Nap Tropolone To Enhance Pulmonary Delivery For The Treatment Of Pulmonary Metastatic Osteosarcoma, Wafaa N. Aldhafiri

Theses & Dissertations

Osteosarcoma is the most common primary bone tumor in children and adolescents. Metastasis is prevalent in 25% of patients, at diagnosis, with the lungs being the most common metastatic site. Pulmonary metastatic osteosarcoma is a significant therapeutic challenge with a 5-year survival rate of ≤30%. Patients with pulmonary metastatic disease at diagnosis receive the same standard of care as patients with local disease, which hasn’t changed over the past 30 years. The treatment and prevention of pulmonary metastatic osteosarcoma represents a significant critical and unmet need.

MO-OH-Nap tropolone is a novel small molecule with cytotoxic activity across multiple human osteosarcoma …

Microencapsulation Of Cosmos Caudatus Kunth Extract Using Sodium Alginate And In Vitro Antioxidant Activity Test, Safina Samara Nur Fadlila, Oktavia Eka Puspita, Zubaidah Ningsih, Anna Safitri

Makara Journal of Science

This study aims to encapsulate Cosmos caudatus K. leaf extract in sodium alginate crosslinked with calcium chloride (CaCl₂) as coating materials through freeze-drying. Antioxidant assays were performed to evaluate the applicability of the microcapsules as antidiabetic medicines. Their characteristics, antioxidant activity, and encapsulation efficiency (EE) were also examined. Results indicated that the concentration of sodium alginate and pH influenced the manufacturing process of the microcapsules. The highest EE was obtained at pH 6 and alginate concentration of 2% (w/v). The IC₅₀ for the antioxidant activity of the microcapsules was 139.96 ± 1.094 μg/mL. Scanning electron microscopy confirmed …

Assessment Of In-Vitro And In-Vivo Pre-Clinical Pharmacokinetics Of Epz015666; A Novel Small Molecule For Medulloblastoma Treatment, Pratiksha U. Kshirsagar

Theses & Dissertations

Group 3 medulloblastoma (MB) has the worst prognosis of the MB subgroups associated with elevated MYC expression and a 5-year survival rate of

Quantitation of EPZ was performed on a Shimadzu LC-MS/MS system utilizing electrospray ionization operated in positive mode. The validated assay was linear from 0.2 to 500 ng/mL. Metabolic stability studies demonstrated slow intrinsic clearance of EPZ in mouse and human liver microsomes, suggesting no CYP-mediated metabolism. Additionally, EPZ exhibited low binding affinity to plasma and brain proteins and high apparent permeability across artificial membranes, indicating efficient membrane penetration. Drug transporter studies identified EPZ as a substrate of …

Synthesis Of Thermoresponsive Poly(N-Isopropyl Acrylamide) Based Core-Shell And Hollow Shell Nanogel With Tunable Core And Shell Thickness, Mohamad Hijazi, Molla R. Islam

Student Scholar Symposium Abstracts and Posters

Nanogels have emerged as a notably safer and more effective means for drug delivery, primarily due to their adjustable drug-loading capabilities. Hollow-core nanoparticles offer some unique properties that are desirable for drug delivery applications. Initially, silica core nanoparticles were synthesized using the Stöber process at different temperatures where Tetraethoxysilane (TEOS) undergoes hydrolysis in the presence of ethanol and then a condensation reaction to form silica nanoparticles. Scanning Electron Microscopy (SEM) and Optical Microscopy (OM) analysis revealed that the size of silica core particles varied with the synthesis temperature (300 nm at 30°C to 150 at 60°C). The core silica particles …

Mechanistic Study Of Antimicrobial Cyclic Peptide [R4w4] Antibacterial Effectiveness Against Methicillin-Resistant Staphylococcus Aureus (Mrsa), Ajayi Akinwale

Pharmaceutical Sciences (PhD) Dissertations

Antimicrobial peptides (AMPs) are being explored as a potential solution to combat antibiotic resistance, as they have shown promise in reducing susceptibility to antibiotics. This study explores if [R₄W₄] peptide is bacteriostatic or bactericidal using modified two-fold serial dilution and evaluates synergism of gentamicin and [R₄W₄] against Escherichia coli (E. coli) and Methicillin-resistant Staphylococcus aureus (MRSA) by checkered board assay. The MRSA resistant to [R₄W₄] and possibility with other antibiotics was evaluated with serial passage. Moreover, we investigated the mechanism of action of [R₄W_{4 …}

Antioxidant Activities And Protective Effects Of Shorea Macrophylla Leaf And Bark Extracts, Salfarina Ramli, Nik Nor Sabrina Sukri, Nur Adhwa’ Faqihah Zulkifli, Donna Maretta Ariestanti, Chee Yan Choo, Hasseri Halim, Nurhuda Manshoor, Richard Johari James

Pharmaceutical Sciences and Research

Shorea macrophylla, also known as the ‘Engkabang’ tree or Light Red Meranti, is renowned for its role in reforestation efforts. Despite lacking records of traditional use, the reported biological activities of other species within the Shorea genus spark curiosity about the potential biological activities of this plant. Therefore, this study aims to explore the antioxidant capabilities of S. macrophylla leaf and bark extracts, along with their protective effects against oxidative stress using a brine shrimp model. In the evaluation of antioxidant potential, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays were employed. Extracts were incubated in …

The Light Scattering Properties Of Amorphous Nanoparticles Formed By Poorly Soluble Drugs, Sarah Casella

Honors Scholar Theses

The research of amorphous drug formulations is an emerging field of study, which offers a promising strategy to improve the oral bioavailability of poorly water-soluble drugs. A critical aspect of amorphous solubility is the measurement of particle size and light diffraction, which is measured using dynamic light scattering (DLS). DLS is a technique used to characterize the size of colloidal dispersions, where a laser beam illuminates a suspension of particles or molecules undergoing Brownian motion. In this experiment, a procedure was developed utilizing DLS to investigate the similarities and differences in light diffraction properties of particles among three different poorly …

Investigation Of Avaren-Fc's Therapeutic Potential Against Ovarian Cancer., Katarina Lee Mayer

Electronic Theses and Dissertations

This thesis describes the investigation of Avaren-Fc (AvFc), a novel lectin-based therapeutic fusion protein consisting of the recombinant Avaren lectin and the Fc region of human IgG1, against ovarian cancer. AvFc possesses selectivity toward tumor associated N-linked high-mannose-type glycans. The present study demonstrates AvFc’s in vitro activity against OVCA cell lines via antibody-dependent cell-mediated cytotoxicity and its ability to extend the survival of mice challenged with murine ID8 OVCA cells after repeated systemic administration. Furthermore, AvFc treatment in this model was found to increase the presence of peritoneal leukocytes, suggesting a shift toward an improved antitumor immune response. Another key …

Antioxidant, Tyrosinase Inhibition Activity, And In Vitro Spf Evaluation Of Pepino Fruit Extract (Solanum Muricatum Aiton) In Different Solvent Types And Concentrations, Nining Sugihartini, Girly Risma Firsty, Wahyu Kumil Laila, Sri Mulyaningsih, Ichwan Ridwan Rais

Pharmaceutical Sciences and Research

Solvent is a key factor that affects the effectiveness of active compound extraction from plant materials (simplisia). This study aimed to determine the optimal type and concentration of solvent used in the extraction of pepino fruit based on the parameter of antioxidant and tyrosinase inhibition activity, as well as Sun Protection Factor (SPF) value. The extraction was carried out using the maceration method with ethanol or ethyl acetate as the solvent, each at concentrations of 50%, 70%, and 96%, respectively. The antioxidant activity of the extracts was evaluated using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The inhibition of tyrosinase and …

Broad-Spectrum Activity Of Membranolytic Cationic Macrocyclic Peptides Against Multi-Drug Resistant Bacteria And Fungi, Sandeep Lohan, Anastasia G. Konshina, Rakesh K. Tiwari, Roman G. Efremov, Innokentiy Maslennikov, Keykavous Parang

Pharmacy Faculty Articles and Research

The emergence of multidrug-resistant (MDR) strains causes severe problems in the treatment of microbial infections owing to limited treatment options. Antimicrobial peptides (AMPs) are drawing considerable attention as promising antibiotic alternative candidates to combat MDR bacterial and fungal infections. Herein, we present a series of small amphiphilic membrane-active cyclic peptides composed, in part, of various nongenetically encoded hydrophilic and hydrophobic amino acids. Notably, lead cyclic peptides 3b and 4b showed broad-spectrum activity against drug-resistant Gram-positive (MIC = 1.5–6.2 µg/mL) and Gram-negative (MIC = 12.5–25 µg/mL) bacteria, and fungi (MIC = 3.1–12.5 µg/mL). Furthermore, lead peptides displayed substantial antibiofilm action comparable …

Harnessing Exosomes As A Platform For Drug Delivery In Breast Cancer: A Systematic Review For In Vivo And In Vitro Studies, Abdulwahab Teflischi Gharavi, Saeed Irian, Azadeh Niknejad, Keykavous Parang, Mona Salimi

Pharmacy Faculty Articles and Research

Breast cancer remains a significant global health concern, emphasizing the critical need for effective treatment strategies, especially targeted therapies. This systematic review summarizes the findings from in vitro and in vivo studies regarding the therapeutic potential of exosomes as drug delivery platforms in the field of breast cancer treatment. A comprehensive search was conducted across bibliographic datasets, including Web of Science, PubMed, and Scopus, using relevant queries from several related published articles and the Medical Subject Headings Database. Then, all morphological, biomechanical, histopathological, and cellular-molecular outcomes were systematically collected. A total of 30 studies were identified based on the Preferred …

Ai Renaissance: Pharmaceuticals And Diagnostic Medicine, Ty J. Feeney, Michael S. Sinha

All Faculty Scholarship

The explosive growth of Artificial Intelligence (AI) in the modern era has led to significant advancements in the world of medicine. In drug discovery, AI technology is used to classify proteins as drug targets or non-targets for specific diseases, more accurately interpret and describe pharmacology in a quantitative fashion, and predict protein structures based on only a protein sequence for input. AI methods are used in drug development to generate predictive models for drug screening purposes, refine and modify candidate structures of drugs to optimize compounds, and predict a drug’s physiochemical properties, bioactivity, and toxicity. For medical devices, the advancement …

Tracing Antibacterial Compounds From Kaledang (Artocarpus Lanceifolius Roxb.) Stem Bark, Hamsidar Hasan, Tety Tuloli, Syamsul Bahri, La Ode Aman

Pharmaceutical Sciences and Research

Artocarpus lanceifolius Roxb. or kaledang is a species of the mulberry family, Moraceae. Several extracts from its family have been reported to have antibacterial activity. Thus, it is necessary to determine compounds that have nature as antibacterial to be raw materials for antibacterial herbal medicines. The purpose of the study was to trace compounds that have antibacterial activity from Artocarpus lanceifolius stem bark. The study method was extraction by graded maceration, fractionation with column vacuum chromatography (CVC), isolation by radial chromatography, determination of antibacterial activity by agar diffusion method using the Gram positive and Gram negative bacteria. The characterization …

Antimicrobial Activity Of Crude Fractions Of Gossypium Barbadense Leaves And Isolation Of Stigmasterol, Maryam Saddiq, Ahmed Salisu, Kamaluddeen Kabir, Yusuf Hassan

Pharmaceutical Sciences and Research

Plants have been used in traditional medicine in different parts of the world to treat several diseases. Many studies have confirmed their medicinal values, which have led to the isolation and characterization of various potential drug candidates. This study focuses on the antimicrobial activity of crude fractions of Gossypium barbadense leaves and the isolation of active compound. The pulverized plant leave was soaked in ethanol (98% v/v), and a solvent-based fractionation was carried out using n-hexane, chloroform, ethyl acetate, and ethanol. The obtained crude fractions were screened for antimicrobial activity against four (4) clinical isolates: Escherichia coli, Pseudomonas …