Pharmaceutical plasticizers for drug delivery systems

In the field of pharmaceutical science and drug development, there are important and particular challenges related to the selection of suitable and compatible ingredients as well as the design of successful formulations. As plasticization is a phenomenon widely exploited in all formulation fields, plasticizers should be recognized as a critical aspect for drug delivery. The choice of an appropriate plasticizer requires a wide background of information. This is because they are incorporated into drug delivery systems containing an assortment of ingredients which may have different reactions to the presence of plasticizers. Concurrently, there are numerous pharmaceutical plasticizers and various environmental issues dictating favored solutions. To address these encumbrances, an extensive information concerning plasticizers; their types, properties, pharmaceutical roles, etc. is discussed. Additionally, the specific objective of this review is to substantiate the safety and performance of newly discovered plasticizers.     

Effects of combined erythropoietin and epidermal growth factor on renal ischaemia/reperfusion injury: a randomized experimental controlled study

What’s known on the subject? and What does the study add? It is well known that erythropoietin (EPO) ameliorates the renal injury induced by ischemia or toxins such as cisplatin and radiocontrast media. Also, epidermal growth factor (EGF) exerts a prophylactic nephroprotective effect against the deleterious consequences of the ischemia/reperfusion (I/R) injury. Nevertheless, the combined effect of both drugs remains to be further investigated. This study examined the protective effects of EPO and EGF alone and in combination against renal I/R injury and showed that EPO alone was more powerful than EGF alone and the combination of both drugs was more protective than each agent alone.

OBJECTIVE

To investigate effects of combination of erythropoietin (EPO) and epidermal growth factor (EGF) on renal ischaemia and on reactive oxygen species in a rat model.

MATERIALS AND METHODS

In all, 90 male Sprague‐Dawley rats were allocated into five groups of 18, designated: Sham; treated with right nephrectomy only; Control, subjected to left renal ischaemia for 45 min with no treatment; EPO‐treated, as the control but with EPO pretreatment; EGF‐treated, as the control but with EGF pretreatment; EPO + EGF‐treated, as the control but with EPO and EGF pretreatment. Renal function, histopathology and malondialdehyde (MDA), superoxide dismutase (SOD) and reduced glutathione (GSH) levels in kidneys were assessed at 1, 2 and 7 days after ischaemia.

RESULTS

All rats except the controls had a significant improvement in serum creatinine, creatinine clearance and fractional excretion of Na⁺; all three were significantly better in EPO + EGF group than in all other groups Histopathological examination showed marked structural damage in control rats. The tubular damage was least in the EPO + EGF group. The control group had a significant increase in MDA level and a significant decrease in SOD and GSH, while the EPO + EGF group had a marked significant reduction in MDA and increase in GSH and SOD.

CONCLUSION

The protection against ischaemia/reperfusion injury might be maximal when EPO and EGF are administered concomitantly, and their protective effect might be partly due to their antioxidant effects.     

Knowledge,attitude and practice of El-Minia university students towards pandemic H1N1, Egypt, 2009

Aim  

This study was conducted to assess the knowledge, attitudes and practices of El-Minia university students regarding H1N1 and its preventive measures.     

Health-related quality of life among hemodialysis patients at El-Minia University Hospital, Egypt

Background

Hemodialysis results in significant change in daily living, physical and psychological impairments, disruption of marital, family, and social life. Health-related quality of life (HRQOL) assessment helps to plan individual treatment strategies, and determine the efficacy, quality of medical and social care provided.

Aim

The focus of the study was to assess HRQOL of hemodialysis patients attending El-Minia University Hospital dialysis unit, determine the relation between HRQOL and some sociodemograghic factors and clinical disorders and also to compare HRQOL between patients performing hemodialysis for less than and more than 5 years.

Subjects and methods

The study is a cross-sectional hospital-based study that included 170 hemodialysis patients; 81 males and 89 females, mean age 46.6?±?14.6 years. In all 59.4 % were rural residents. Data were collected by a questionnaire which included, demographic, social and medical data. Kidney Disease Quality of Life-36 (KDQOL-36) health survey was used for assessment of HRQOL.

Results

About two thirds (64 %) of the studied hemodialysis patients had physical and mental quality of life (QOL) scores below average level. HRQOL was lower in old, female, married, illiterate and non-worker hemodialysis patients. Hepatitis C positive (HCV), diabetic and anemic patients had decreased QOL scores. A longer duration of hemodialysis treatment was associated with reduced physical QOL.

Conclusion

The most important sociodemographic factors affecting HRQOL were age, sex, education, occupation and marital status. The most important clinical disorders affecting QOL were anemia, HCV infection, sleep disturbances and diabetes. Increase awareness of hemodialysis patients and their caregivers about disabilities associated with hemodialysis treatment and educational programs to decrease the problems which the patients face and to increase the QOL.     

Development of budesonide nanocluster dry powder aerosols: processing

Aerosolized medicine is one of the fastest growing areas in the pharmaceutical industry. Dry powder aerosols of pharmaceutical compounds are particularly attractive for the prevention and treatment of respiratory diseases but are also emerging as a treatment option for systemic diseases. Engineering particles in dry powder formulations can overcome many of the limitations of traditional inhaled pharmaceuticals. Here, a wet milling process for producing agglomerated budesonide nanoparticles (i.e., "NanoClusters") was explored. Parameters such as milling time and drug concentration were investigated, and the aerosol performance of dried budesonide NanoClusters was characterized. The wet milling process was able to produce aerosol particles composed entirely of budesonide. High emitted fraction and a large fine particle fraction suggested that the NanoCluster budesonide formulation would offer highly efficient delivery of drug throughout the lung.     

Synthesis of novel pyrazole and dihydropyrazoles derivatives as potential anti-inflammatory and analgesic agents

Novel dihydropyrazole 5-8, 10 and pyrazole derivatives 12, 14, 15, 17 were synthesized. The structures of the newly synthesized compounds were elucidated by spectral and elemental analyses. The anti-inflammatory activity of all new compounds was evaluated using the carrageenan-induced rat paw edema test using indomethacin and celecoxib as reference drugs. The most active derivatives as anti-inflammatory agents were accordingly tested for their analgesic activity using the p-benzoquinone-induced writhing method in mice and results revealed that these compounds had also good analgesic activity. The ulcerogenic liability of the selected compounds was also evaluated. Results showed that the selected derivatives had anti-inflammatory activity comparable to or slightly lower than the reference drugs, reaching about 82% inhibition with a considerable gastric safety profile.     

Green synthesis of novel antifungal 1,2,4-triazoles effective against γ-irradiated Candida parapsilosis

This study reports the green synthesis of 11 novel 3-substituted-4-amino-5-mercapto-1,2,4-triazole derivatives using water as a readily available nontoxic solvent. Evaluation of their antimicrobial potential against several clinical pathogenic microorganisms was carried out. The newly synthesized cysteine derivative 6 showed promising antifungal activity against both γ-irradiated and nonirradiated Candida parapsilosis 216, with the lowest MIC (minimum inhibitory concentration) value of 3.125 µg/ml, probably through inhibition of 14α-demethylase. In addition, compound 6 showed complete inhibition of gelatinase, a virulence enzyme of C. parapsilosis. Also, scanning electron microscopy was carried out. Interestingly, compound 6 acted as a dual agent as it also showed good antibacterial activity against strains of Gram-positive bacteria used in the study. The synthesized compounds showed no cytotoxicity.