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Osman SK, Yassin TM, Abdelzaher A, Ahmed F, Mohammed AM, Abdellatif AAH, Saleh KI, Mahdi WA, Alshehri S, Hamd MAE, Sarhan H. Self-assembling Organogels Loaded with Tenoxicam for Local Intensive Pain and Inflammation Cure: In Vitro and In Vivo Correlation. AAPS PharmSciTech 2024; 25:18. [PMID: 38263347 DOI: 10.1208/s12249-024-02742-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 01/05/2024] [Indexed: 01/25/2024] Open
Abstract
Due to tenoxicam (TX)'s poor aqueous solubility (0.072 mg/ml), it is poorly absorbable in the GIT, and the long-term oral administration of TX may cause severe GIT disturbances. Topical administration of TX can help in bypassing the GIT adverse effects. Therefore, in the present work, we constructed different pluronic/lecithin organogels (PLOs) for topical delivery of TX. PLO was constructed simply via direct mixing of an aqueous pluronic solution with lecithin solution. The prepared PLO formulations were characterized for their physicochemical properties including pH, drug content, visual inspection, viscosity, and spreadability. Also, the in vitro release and kinetic studies were carried out to investigate the mechanism of drug release. Moreover, the in vivo studies were carried out by investigating the anti-inflammatory and analgesic activities using albino male rats. The results showed that the modified PLOs have good physicochemical properties. The viscosity of the modified gels is a direct proportionality with both lecithin and pluronic concentrations. Also, subsequently, the drug release rate is directly proportional to gel viscosity. Moreover, the in vivo studies showed that the modified PLOs (F19) showed a significant ( < 0.05%) paw edema inhibition and pain analgesia compared with other investigated groups. Also, the results indicated that the increase in dose is accompanied by higher activity and a longer duration of action which extended to 12 h. Hence, the modified PLOs are promising safe candidates or vehicles for effective TX loading with sustained delivery behavior.
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Affiliation(s)
- Shaaban K Osman
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt.
| | - Taher M Yassin
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Minofia University, Minofia, Egypt
| | | | - Fatma Ahmed
- Department of Zoology, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Ahmed M Mohammed
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
| | - Ahmed A H Abdellatif
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
- Department of Pharmaceutics, College of Pharmacy, Qassim University, 51452, Buraydah, Saudi Arabia
| | - Khalid I Saleh
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
| | - Wael A Mahdi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Mohamed A El Hamd
- Department of Pharmaceutical Chemistry, College of Pharmacy, Shaqra University, 11961, Shaqra, Saudi Arabia.
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, South Valley University, Qena, 83523, Egypt.
| | - Hatem Sarhan
- Department of Pharmaceutics, Faculty of Pharmacy, Minia University, Minia, Egypt
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Osman SK, Yassin TM, Mohammed AM, Alfayomy AM, Abdellatif AA, Mahdi WA, Alshehri S, Hamd MAE, Sarhan H, Ibrahim MA. A Novel Approach for the Availability and Ocular Delivery of Tenoxicam Potassium: Synthesis, Characterization, and In Vivo Application. AAPS PharmSciTech 2023; 24:44. [PMID: 36703092 DOI: 10.1208/s12249-022-02487-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 12/08/2022] [Indexed: 01/27/2023] Open
Abstract
Tenoxicam (TX) is a non-steroidal anti-inflammatory agent that can be used to control pain in various ophthalmic lesions like cataracts, refractive surgery, and corneal abrasion. TX has a very slightly aqueous solubility of 0.072 mg/mL resulting in difficulty to be formulated in ophthalmic solutions. This study aims to improve TX solubility by converting it into its potassium salt to achieve a target of 10 mg/mL (1%w/v) concentration of TX in the desired aqueous medium for the formulation of aqueous ophthalmic solutions. The synthesized TX salt was characterized by different evaluation parameters such as solubility studies, 1H NMR, IR, and elemental analyses. Different TX potassium solutions were formulated at concentrations of 0.5% and 1% w/v using different viscosity-imparting agents. The prepared solutions were characterized for their physicochemical properties including visual inspection, pH, rheological, in vitro release, and kinetic behavior. Also, the formulations were biologically evaluated in vivo using male albino rabbits. The obtained results showed the successful synthesis of TX salt, as indicated by IR and NMR, and elemental analysis. The solubility study showed that the solubility of TX was improved hugely to 18 mg/mL (250-fold). In addition, the results showed that the prepared formulations showed acceptable physicochemical properties. The highest release rate was obtained with formula F1, which contains no viscosity-imparting agents. While as, the lowest release rate was obtained in the case of formula F9, composed of Pluronic F127 (12% w/v). The in vivo results showed that TX optimized ophthalmic solutions F8 and F9 inhibited the redness and edema in an extended or sustained manner.
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Affiliation(s)
- Shaaban K Osman
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt.
| | - Taher M Yassin
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Minofia University, Minofia, Egypt
| | - Ahmed M Mohammed
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
| | - Abdallah M Alfayomy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
| | - Ahmed A Abdellatif
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt.,Department of Pharmaceutics, College of Pharmacy, Qassim University, Qassim, 51452, Saudi Arabia
| | - Wael A Mahdi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed A El Hamd
- Department of Pharmaceutical Sciences, College of Pharmacy, Shaqra University, Shaqra, 11961, Saudi Arabia. .,Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, South Valley University, Qena, 83523, Egypt.
| | - Hatem Sarhan
- Department of Pharmaceutics, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Mohammed A Ibrahim
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Al-Azhar University, Assiut, 71524, Egypt
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Yassin TM, Toner PG. Langerhans cells in the human oesophagus. J Anat 1976; 122:435-45. [PMID: 1002612 PMCID: PMC1231913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The dendrite cells of Langerhans, first identified in the epidermis, have now been observed in the middle and superficial layers of the normal human oesophageal mucosa. They exhibit typical Langerhans granules, but no desmosomes and tonofilaments. They often have irregular indented nuclei, with a relatively pale cytoplasm contrasting with that of the adjacent squamous cells. These cells are sometimes difficult to distinguish from intra-epithelial lymphocytes, which are also encountered in the oesophageal mucosa and which share certain ultrastructural characteristics with Langerhans cells.
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