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Go to Editorial ManagerHigh-performance liquid chromatography (HPLC) is one of the most common analytical techniques used in pharmaceutical testing and in many other scientific fields. It is widely used because it can analyze different types of materials and give accurate and reliable results. HPLC is considered an important and trusted method in many laboratories. This narrative review gives a general explanation of HPLC, including its basic principles, simple instruments, and how the technique works with different samples. In pharmaceutical analysis, HPLC is mainly used in quality control laboratories. It is applied for drug assay, titration tests, impurity analysis, solubility studies, and stability testing. Many studies show that HPLC helps in ensuring the quality and safety of pharmaceutical products. In addition, HPLC is used in pharmacovigilance and toxicology to detect degradation products, identify counterfeit drugs, and find harmful or toxic compounds. These applications are important for protecting patient safety and supporting regulatory requirements. HPLC is also used in other fields such as environmental analysis, forensic science, and food analysis. In environmental studies, it helps detect pollutants and trace chemicals in water and soil samples. In forensic laboratories, HPLC is used to identify unknown substances in biological or chemical samples. In food analysis, it is applied to detect additives, contaminants, and residues. Although HPLC instruments have developed over time, proper method development, validation, and correct interpretation of results are still necessary to obtain reliable data for routine laboratory work and pharmaceutical regulatory use.
A reliable, rapid, and economical analytical method is required for the quality control of pharmaceutical preparations containing chlorphenamine maleate (CPM) and paracetamol (PCM). This study aimed to develop and validate a reversed-phase high-performance liquid chromatography (HPLC) method for the simultaneous determination and separation of these two common drugs. The chromatographic separation was performed on a C18 column (250×4.6 mm, 5 µm) using an isocratic mobile phase of phosphate buffer (pH 6), water, acetonitrile, and ethanol (70:15:15 v/v) at a flow rate of 0.8 ml/min. Detection was performed using a UV-Vis detector set at 228 nm. The method was validated for both pure substances and pharmaceutical preparations in accordance with standard guidelines, assessing linearity, accuracy, detection limit (LOD), and quantification limit (LOQ). The method successfully separated CPM and PCM with retention times of 3.2 min and 5.3 min, respectively, resulting in a total analysis time of less than 10 minutes. The method demonstrated excellent linearity over concentration ranges of 10-120 µg/mL for CPM (R² =1) and 10-110 µg/mL for PCM (R² = 0.9999). It showed high accuracy and reliability. The LOD was 0.06 µg/mL for CPM and 0.27 µg/mL for PCM, while the LOQ was 0.18 µg/mL for CPM and 0.82 µg/mL for PCM. The developed HPLC method is rapid, sensitive, precise, and economical. It is therefore suitable for routine quality control analysis and for the simultaneous quantification of chlorphenamine maleate and paracetamol in combined pharmaceutical dosage forms.
Schiff bases have been a very important category of chemical molecules in medicine and pharmacology over the last several decades. Their structure contains an azomethine functional group (-C=N-).This group is typically formed by the condensation of primary amines with aldehydes or ketones. Schiff bases are relatively easy to synthesize, and their structural versatility allows modification for diverse biological applications. From a medicinal standpoint, Schiff bases have demonstrated a wide range of biological activities, including antimicrobial, anticancer, anti-inflammatory, antioxidant, and antiviral effects.Multiple studies suggest that even small alterations in chemical structure, such changes in substituent characteristics or the introduction of heterocyclic groups, may substantially affect biological efficacy. Schiff bases are also recognized for their ability to coordinate with metal ions, which has led to the development of numerous metal complexes with new or improved pharmacological characteristics.The medicinal significance of Schiff bases is further supported by their proposed mechanisms of action, including enzyme inhibition, interaction with microbial cell membranes, DNA binding, and modulation of oxidative stress pathways.These characteristics make Schiff bases attractive frameworks for the development of novel therapeutic agents.This review aims to highlight the pharmaceutical importance of Schiff bases by focusing on their chemical characteristics and key antibacterial, antifungal, antiviral, and anticancer activities, while also discussing their potential applications in drug discovery and development.
Vital cellular processes such as, proliferation and tumor progression were reported to be centrally controlled by histone deacetylase (HDAC) enzymes which make them an interesting therapeutic target. Recently, a new paradigm has attracted researches to combine nonsteroidal anti-inflammatory drugs (NSAIDs) with para-aminobenzoic acid (PABA) and a zinc binding group (ZBG), presenting a synergistic impact on HDAC activity and inflammatory process. In the current study, a novel series of hybrid compounds (A1-6) were designed and evaluated for their HDAC binding affinity by molecular docking technique along with conducting an in-silico ADME (absorption, distribution, metabolism, and elimination) profiling to assess their pharmacokinetic characteristics. Compound A6 displayed the highest binding energy score (-9.539 kcal/mol) with the active site of HDAC 8 enzyme compared with the reference ligand, SAHA (-4.606 kcal/mol). Its worth mentioning that compound A6 has comparable coordination to the catalytic zinc ion with SAHA along with engaging additional hydrophobic and aromatic interaction within the active site of HDAC 8 enzyme. ADME analysis predicated high gastrointestinal absorption for A2, A5, and A6, which also comply with Lipinski's rule, indicating good oral bioavailability. Conversely, A1, A3, and A4 showed moderate absorption, suitable for parenteral or localized/colon-targeted delivery, potentially advantageous for colon cancer treatment. These results highlight these hybrids’ potential as HDAC inhibitors and support further synthesis and biological testing.
Background: Lifestyle medicines (LSMs) are used to help people alter their lifestyles. These medicines are used for purposes other than medicine or health. Aims & Objectives: The objective of the study was to evaluate the prevalence of LSM use among the students of the university, the rationale for their utilization, and the kinds of consequences, in order to give useful data for reasoning and prevention of this problem. Method: A cross-sectional descriptive research study was carried out. university students in Wasit, Iraq, by using a self-administered questionnaire. Participants were usefully recruited through online platforms. The questionnaire consist of four sections, including sociodemographic profile, knowledge, and awareness in a validated questionnaire format. Results: A total of 500 students aged between 18-25 and more were surveyed. The number who utilize LSMs was 470(94%). The most common agents utilized by a high number of students were vitamins 136(28.94%) followed by Non-steroidal anti-inflammatory drugs 41(8.72%), then caffeine-containing substances 38(8.09% ). The most frequent adverse effects related to use of LSMs were lethargy and fatigue and 68 (14.47%), and insomnia 41(8.72%). Conclusion: Awareness of Lifestyle Medications (LSMs) was moderate, with medical advice being the primary source of information. The study found a high prevalence of LSM use, with vitamins being the most commonly used. Adverse effects varied among users, with fatigue and the lethargy being the most reported. Despite diverse perceptions toward LSMs, a significant differences in awareness were noted based on gender and study field, highlighting the need for targeted education and intervention strategies.
Objective Angiogenesis is an essential process in tumor growth and progression, and thus it represents a promising therapeutic target. Lawsonia inermis (henna) is a widely-used traditional medicine with different biological applications, and its bioactive components, especially lawsone, showed anticancer activity. The objective of this research was to measure the anti-angiogenic and antioxidant properties of Lawsonia inermis leaf ethanolic extract in ex vivo and in vivo systems. Methods Soxhlet was used to prepare the ethanolic extract of the Lawsonia inermis leaf. The ex vivo rat aorta ring assay was used to test the anti-angiogenic activity at the concentrations of 100, 50, 25, 12.5, and 6.25 µg/mL. The in vivo chick chorioallantoic membrane (CAM) assay was employed to confirm the anti-angiogenic effect at a concentration of 10 mg/mL. DPPH radical scavenging assay was used to determine the antioxidant activity with a concentration range of 3.125 to 100 µg/mL. Results The ethanolic extract demonstrated high anti-angiogenic activity in the rat aorta ring with 65.82% inhibition at 100 µg/mL and dose-dependent inhibition with an IC 50 of 54.2 µg/mL. In the CAM assay, acetylsalicylic acid (positive control) resulted in complete suppression of vascularization, validating the assay system. The extract exhibited a concentration-dependent radical scavenging ability of DPPH radical with an IC 50 value of 0.05 µg/mL. Conclusions Lawsonia inermis ethanolic extract has strong anti-angiogenic and antioxidant properties, which implies its possible application as a treatment of angiogenesis-related disorders, such as cancer. The anti-angiogenic effect was confirmed in both ex vivo and in vivo models.
Background: Volkameria inermis is a medicinal plant traditionally used for its antimicrobial, anti-inflammatory, and antioxidant properties. Owing to the increasing resistance of pathogenic bacteria to conventional antibiotics, there is a growing interest in exploring plant-derived compounds as alternative therapeutic agents. Objectives: The objective of this study was to assess the effectiveness of an ethanolic extract of Volkameria inermis leaves by using an ethanolic solvent that was eighty percent strength. Methods: Samples of leaves were gathered from the center area of Iraq (Al-Musayab), and washed, sorted, and dried in a shaded environment. Through the use of 800 milliliters of 80% ethanol, an extract of Volkameria inermis leaves was created and dried using a rotary evaporator, it was stored in petri dishes that had been sterilized, and one milligram of the extract was dissolved in one milliliter of dimethyl sulfoxide (DMSO). To conduct the antibacterial test using the agar well diffusion technique, the solution was serially diluted to a concentration of 1 mg/ml. The efficacy of an ethanol extract against bacteria as assessed by well diffusion method. Results: When tested against both (Staphylococcus aureus) and (Salmonella typhi) bacteria, the ethanolic extract of Volkameria inermis demonstrated a notable antibacterial effect at a concentration of 500 μg/ml, which resulted in more inhibition zones than the antibiotic ciprofloxacin. Conclusion: The outcomes of this study demonstrated that the Volkameria inermis plant outperformed the drug ciprofloxacin in its antibacterial activity against Staphylococcus aureus and Salmonella typhi.
Objective To develop and disseminate a novel multimodal therapeutic concept for movement disorders (MD) that will not only aim at symptom suppression, but on the functional reorganization of motor networks allowing more stable and meaningful recovery. Methods A net-based model was employed by creating three integrated modules: • Pharmacological tuning in network physiology. • There are some interventional and non-invasive co-modulations of the invasive ones. • Task specific motor retraining at therapeutically optimum doses, in order to reconstruct maladaptive circuits. It was constructed through observations in systems neuroscience and functional imaging of network dynamics involving the basal ganglia, cortex, thalamus, and cerebellum. Results The intervention aims beyond alleviation of symptoms to normalize abnormal connectivity, oscillatory activity and maladaptive plasticity in the respective motor networks. While clinical validation is empirical, theoretical analysis supports the idea that combination of pharmacological, neuromodulator and motor retraining approach might promote functional reorganization and would be effective in longer term improvement. Conclusions Such a multimodal, network-informed therapy could outperform current MD approaches by not only relieving symptoms, but also facilitating adaptive motor network reorganization. This combination of therapies is expected to result in such a superior long-term functional outcome and less variability in patient response.
Objective: Histone deacetylase-2 (HDAC-2) has emerged as an important molecular target in cancer therapy because of its role in gene silencing, regulation of the cell cycle, and resistance to apoptosis in several cancer types. In the present study, a series of novel 4-aminoantipyrine-based derivatives incorporating semicarbazide, thiosemicarbazide, and hydroxylamine pharmacophoric groups were rationally designed and evaluated for their potential HDAC-2 inhibitory activity using in silico approaches. Methods:. The binding affinity of the newly designed compounds toward the HDAC-2 enzyme and their interactions within the catalytic pocket were investigated using molecular docking analysis. The three-dimensional structure of HDAC-2 (PDB ID: 4LXZ) was obtained from the RCSB Protein Data Bank and prepared for docking studies. Results: Docking indicated that ligand stability within the enzyme active site was mainly achieved through coordination with the catalytic zinc ion, in addition to hydrogen bonding and hydrophobic interactions with essential amino acid residues located in the HDAC-2 catalytic domain. The reference inhibitor vorinostat (SAHA) was used as a standard compound and produced a docking score of −5.445 kcal/mol. Among the designed compounds, Compound Ia exhibited the most favorable binding energy with a calculated ΔG of −9.711 kcal/mol. In addition, Compound IIe and Compound Ib demonstrated promising docking scores of −8.285 and −8.147 kcal/mol, respectively. Conclusions: Pharmacokinetic properties were predicted using the QikProp module, revealing that most designed compounds exhibited acceptable drug-likeness according to Lipinski’s Rule of Five. These computational findings suggest that the designed derivatives may represent promising candidates as HDAC-2 inhibitors with potential anticancer activity.