Browsing by Author "Amali, M.O."
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Item An Evaluation of the Impact of Zinc and Copper Metal-Organic Frameworks (MOFs) on the Drug Release Profiles of Piroxicam(Journal of Pharmaceutical Research, Development and Practice, 2020-05) Kola-Mustapha, A.T.; Ayuba, A.A.; Amali, M.O.; Atunwa, S.A.; Ishola, F.; Tella, A.C.Piroxicam is a non-steroidal anti-inflammatory drug (NSAID) poorly soluble in an aqueous medium with a slow and gradual dissolution in biological fluids resulting in sub-optimal efficacy in patients. In recent times, Metal-Organic Frameworks (MOFs), a new class of highly tenable hybrid porous materials with unique properties have been explored for usage as drug carriers and other biomedical applications. This study is aimed at studying the solubility, in vitro release profile and kinetics of piroxicam loaded Zinc and Copper Metal-Organic Frameworks. Piroxicam was loaded on Zinc and Copper MOFs and tested for its solubility, dissolution and drug release profile. The mechanisms of the release pattern of the drug from Zinc and Copper MOFs were analysed using kinetic models. At the end of the study, Piroxicam-loaded Zn MOFs had solubility of 161.34 ± 0.63 μg/mL, while that of Cu MOFs and pure piroxicam had solubility of 154.31 ± 1.27 μg/mL and 134.86 ± 0.48 μg/mL respectively. Within a period of 24 hours, Piroxicam had the highest release from Zn MOFs; with a drug release in the range of 43.70 to 99.10%. Piroxicam was released from the loaded Cu MOFs in the range of 41.20 to 78.3% while the release of pure Piroxicam was in the range of 37.50 to 49.0%. Mechanism of piroxicam release was by Fickian diffusion. Piroxicam was successfully loaded on Zinc and Copper MOFs. Zn MOFs demonstrated a better solubility and dissolution profile as compared to Cu MOFs. These study shows the drug delivery potentials of the Zinc and Copper MOFs in improving the solubility and drug release of piroxicam. ___________________________________________________________________________ KEYWORDS: piroxicam, solubility, zinc, copper, MOFs, drug release.Item Phytochemical, antibacteria and anticonvulsant activity of the stem bark of lannea kerstingii engl & k .Krause (anacadiaceae)(Faculty of Pharmaceutical Sciences, University of Jos, 2018) Njinga, N.S.; Sule, M.I.; Shittu, A.O.; David, M.S.; Amali, M.O.; Bolaji, A.R.; Abdullahi, S.T.; Atunwa, S.A.; Hassan, H.S.; Eniayewu, O.I.The stem bark of Lannea kerstingii Engl. & K. Krause was investigated for its phytochemistry, antibacterial, acute toxicity and anti-convulsant activity. Standard method was used to determine the phytochemistry while the antibacterial activity was determined using agar diffusion and broth dilution method on Staphylococcus aureus, Salmonella typhii, Pseudomonas aeruginosa, Klebsiella pneumonia, Proteus vulgaris, Escherichia coli and Bacillus subtilis. Maximal electroshock-induced seizures test in chicks and Pentylenetetrazole-induced seizures test in mice were used to determine the anticonvulsant activity. The phytochemical studies revealed the presence of flavonoids, tannins, carbohydrates steroids and triterpenes. The ethyl acetate and methanol fraction of the stem bark was found to be active against S. aureus, S. typhi, P. aeruginosa, K. pneumoniae, Proteus sp, E. coli, Bacillus subtilis with zone of inhibition ranging from 20-27.5mm and MIC ranging from 6.25mg/mL to 100mg/mL and MBC from 50mg/mL and above. The LD50 was found to be 2154.066 mg/kg. The crude methanol extract of the stem-bark of L. kerstingii afforded dose (150, 300 and 600mg/kg) dependent protection to the laboratory animals against the hind limb tonic extension though not statistically significant (P<0.05) showing the inability of the extract to inhibit seizure discharge within the brainstem seizure substrate. Meanwhile the extract at doses of 300 and 600mg/kg significantly (P<0.05) prolonged the onset of seizure in pentylenetetrazole (PTZ) test showing the potential of this plant in raising seizure threshold in the brain therefore making it beneficial in the treatment of myoclonic and absence seizures. Thus, justifying the use of this plant in treating convulsion.Item Phytochemical, antibacteria and anticonvulsant activity of the stem bark of Lannea kerstingii Engl & k. Krause (anacadiaceae). Journal of Pharmacy and Bioresources.(Faculty of Pharmaceutical Sciences, University of Jos, 2018) Njinga, Ngaitad; Sule, M.I.; Shittu, A.O.; David, M.S.; Amali, M.O.; Bolaji, A.R.; Abdullahi, S.T.; Atunwa, S.A.; Hassan, H.S.; Eniayewu, O.I.The stem bark of Lannea kerstingii Engl. & K. Krause was investigated for its phytochemistry, acute toxicity, antibacterial and anticonvulsant activit ies. Standard methods were used to evaluate phytochemistry while antibacterial activity was determined using agar diffusion and broth dilution method s on Staphylococcus aureus, Salmonella typhii, Pseudomonas aeruginosa, Klebsiella pneumonia, Proteus vulgaris, Escherichia coli and Bacillus subtilis. Maximal electroshock-induced seizures test in chicks and pentylenetetrazole-induced seizures test in mice were used to determine the anticonvulsant activity. Phytochemical studies revealed the presence of flavonoids, tannins, carbohydrates steroids and triterpenes. Ethyl acetate and methanol fractions of the stem bark were found to be active against S. aureus, S. typhi, P. aeruginosa, K. pneumoniae, Proteus sp, E. coli, Bacillus subtilis with zone of inhibition ranging from 20-27.5mm and MIC ranging from 6.25mg/mL to 100mg/mL and MBC from 50mg/mL and above. LD50 was found to be 2154.066 mg/kg. The crude methanol extract of the stem bark afforded dose (150, 300 and 600mg/kg) dependent protection to the laboratory animals against the hind limb tonic extension though not statistically significant (P<0.05) showing the inability of the extract to inhibit seizure discharge within the brainstem seizure substrate. Meanwhile the extract at doses of 300 and 600mg/kg significantly (P<0.05) prolonged the onset of seizure in pentylenetetrazole (PTZ) test showing the potential of this plant in raising seizure threshold in the brain therefore making it beneficial in the treatment of myoclonic and absence seizures. This justifies the use of the plant in treating convulsion.Item Phytochemical, antibacterial and anticonvulsant activity of the stem bark of Lannea kerstingii Engl. & K. Krause (Anacadiaceae)(Faculty of Pharmaceutical Sciences, University of Jos, 2018-09) Njinga, N.S; Sule, M.I.; Shittu, A.O.; David, M.S.; Amali, M.O.; Bolaji, A.R.The stem bark of Lannea kerstingii Engl. & K. Krause was investigated for its phytochemistry, acute toxicity, antibacterial and anticonvulsant activit ies. Standard methods were used to evaluate phytochemistry while antibacterial activity was determined using agar diffusion and broth dilution method s on Staphylococcus aureus, Salmonella typhii, Pseudomonas aeruginosa, Klebsiella pneumonia, Proteus vulgaris, Escherichia coli and Bacillus subtilis. Maximal electroshock-induced seizures test in chicks and pentylenetetrazole-induced seizures test in mice were used to determine the anticonvulsant activity. Phytochemical studies revealed the presence of flavonoids, tannins, carbohydrates steroids and triterpenes. Ethyl acetate and methanol fractions of the stem bark were found to be active against S. aureus, S. typhi, P. aeruginosa, K. pneumoniae, Proteus sp, E. coli, Bacillus subtilis with zone of inhibition ranging from 20-27.5mm and MIC ranging from 6.25mg/mL to 100mg/mL and MBC from 50mg/mL and above. LD50 was found to be 2154.066 mg/kg. The crude methanol extract of the stem bark afforded dose (150, 300 and 600mg/kg) dependent protection to the laboratory animals against the hind limb tonic extension though not statistically significant (P<0.05) showing the inability of the extract to inhibit seizure discharge within the brainstem seizure substrate. Meanwhile the extract at doses of 300 and 600mg/kg significantly (P<0.05) prolonged the onset of seizure in pentylenetetrazole (PTZ) test showing the potential of this plant in raising seizure threshold in the brain therefore making it beneficial in the treatment of myoclonic and absence seizures. This justifies the use of the plant in treating convulsion.Item Potency evaluation of expired morphine sulphate injections.(Nigerian Journal of Pharmaceutical Sciences. Published by Faculty of Pharmaceutical Sciences, Ahmadu Bello University Zaria., 2021) Abdullahi, S.T.; Yusuf, A.; Njinga, N.S.; Eniayewu, O.I.; Bamidele, O.D.; Amali, M.O.; Ayanniyi, R.O.; Bakare-Odunola, M.T.Expired drugs have not necessarily lost their potency and efficacy as expiration dates are only assurances that the labeled potency will last at least until that time. Clinical situations may arise in which expired medicines might be considered owing to lack of viable alternatives or financial concerns. Moreover, limited studies have reported potency of pharmaceuticals beyond their labeled expiration dates. This study determined the potencies of expired morphine sulphate (10 mg and 15 mg) injections using British Pharmaceutical Codex specific absorptivity [E (1%, 1 cm)] values of 41 [at wavelength of maximum absorbance (λmax) of 285 nm] in water and 70 [at λmax of 298 nm] in 0.1N NaOH and compared with that of unexpired morphine hydrochloride (10 mg) injection. With the exception of expired morphine 15 mg injection, both the unexpired and expired 10 mg injections exceeded the United State Pharmaceutical Codex maximum acceptance limit of 110.0% (acceptance criteria of 90.0% – 110.0%). Although the percent contents of expired morphine 15 mg injections were significantly different from those of unexpired morphine 10 mg injections [mean percent content difference (95% confidence interval): 13.98% (11.05, 16.92) using water and 13.02% (8.95, 17.08) using 0.1N NaOH], expired morphine 10 mg injections were not significantly different from the unexpired morphine 10 mg injections [2.68% (-0.56, 5.92) using water and 7.33% (-3.40, 18.06) using 0.1N NaOH as assay solvents]. This study corroborates a previous report and indicates that expired morphine injections, if properly stored, can be extended past their expiration dates. While it is always best to use unexpired medication, expired morphine injections could be considered when it becomes the sole available option.