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1.
Article in Portuguese | LILACS | ID: lil-560254

ABSTRACT

O presente trabalho tem por objetivos validar métodos por espectrofotometria de absorção no ultravioleta e cromatografia líquida de alta eficiência para o doseamento de metronidazol em solução injetável e aplicá-los em estudo de equivalência farmacêutica entre medicamento de referência, genérico e similar. Os métodos propostos para doseamento de metronidazol em solução injetável por espectrofotometria de absorção no ultravioleta e por cromatografia líquida de alta eficiência foram validados, mostrando especificidade / seletividade, linearidade e faixa linear, limite de detecção /quantificação, exatidão e precisão adequados para o uso pretendido. Os medicamentos foram avaliados quanto aos testes de determinação de pH, volume médio, identificação por espectrofotometria de absorção no infravermelho, identificação por cromatografia líquida de alta eficiência, esterilidade, endotoxinas bacterianas e doseamento por espectrofotometria de absorção no ultravioleta e por cromatografia líquida de alta eficiência. Os três medicamentos atenderam as especificações para os testes avaliados e, portanto, podem ser considerados apresentando equivalência farmacêutica.


The aim of this study was to validate analytical methods, based on UV absorption spectrophotometry and high performance liquid chromatography (HPLC), to assay metronidazole supplied in injectable solutions, and to employ these methods in a study of the pharmaceutical equivalence of the original brand name medicine (?reference?), generic and similar (brand) medicines. The methods proposed for the metronidazole assay were validated, showing adequate specificity/selectivity, linearity, linear range, detection and quantitation limits, accuracy and precision for the intended purpose. The injectable solutions were then tested to determine pH, volume and identity (by IR spectrophotometry), to verify sterility, detect bacterial endotoxins and assay the drug by the proposed UV spectrophotometric and HPLC methods. All three medicines met the requirements in all tests performed and, therefore, can be considered pharmaceutically equivalent.


Subject(s)
Humans , Drug Evaluation , Metronidazole/administration & dosage , Pharmaceutical Solutions
2.
Article in Portuguese | LILACS | ID: lil-549778

ABSTRACT

O presente trabalho teve por objetivos validar método para o doseamento de aciclovir em creme por espectrofotometria de absorção no ultravioleta e aplicá-lo em estudo de equivalência farmacêutica entre medicamento de referência, genérico e similar. O método proposto para doseamento de aciclovir em creme por espectrofotometria de absorção no ultravioleta foi validado, mostrando especificidade/ seletividade, linearidade e faixa linear, limite de detecção /quantificação, exatidão e precisão adequados para o uso pretendido. Os medicamentos foram avaliados quanto aos testes de peso médio, limite de guanina por cromatografia em camada delgada, identificação por espectrofotometria de absorção no ultravioleta, contagem microbiana de bactérias e fungos, pesquisa de microrganismos patógenos e doseamento por espectrofotometria de absorção no ultravioleta. Os três medicamentos atenderam as especificações para os testes avaliados e, portanto, podem ser considerados equivalentes farmacêuticos.


The aim of this study was to validate a UV absorption spectrophotometric method to assay acyclovir in cream and to use it to verify the pharmaceutical equivalence of the original brand-name, generic and similar (brand) medicines. The method proposed for acyclovir cream was validated, showing adequate specificity/selectivity, linearity and linear range, detection and quantitation limits, accuracy and precision. The medicines were tested for average weight, guanine contents within limits (by thin-layer chromatography), drug identity (by UV spectrophotometry), bacterial and fungal counts and presence of pathogens, and were assayed by UV spectrophotometry. All medicines met the requirements in all these tests and can, therefore, be considered equivalent.


Subject(s)
Acyclovir , Drug Evaluation , Drugs, Generic , Spectrum Analysis
3.
Braz. j. med. biol. res ; 42(4): 339-345, Apr. 2009. graf, tab
Article in English | LILACS | ID: lil-509173

ABSTRACT

We evaluated the effects of chronic allergic airway inflammation and of treadmill training (12 weeks) of low and moderate intensity on muscle fiber cross-sectional area and mRNA levels of atrogin-1 and MuRF1 in the mouse tibialis anterior muscle. Six 4-month-old male BALB/c mice (28.5 ± 0.8 g) per group were examined: 1) control, non-sensitized and non-trained (C); 2) ovalbumin sensitized (OA, 20 µg per mouse); 3) non-sensitized and trained at 50 percent maximum speed _ low intensity (PT50 percent); 4) non-sensitized and trained at 75 percent maximum speed _ moderate intensity (PT75 percent); 5) OA-sensitized and trained at 50 percent (OA+PT50 percent), 6) OA-sensitized and trained at 75 percent (OA+PT75 percent). There was no difference in muscle fiber cross-sectional area among groups and no difference in atrogin-1 and MuRF1 expression between C and OA groups. All exercised groups showed significantly decreased expression of atrogin-1 compared to C (1.01 ± 0.2-fold): PT50 percent = 0.71 ± 0.12-fold; OA+PT50 percent = 0.74 ± 0.03-fold; PT75 percent = 0.71 ± 0.09-fold; OA+PT75 percent = 0.74 ± 0.09-fold. Similarly significant results were obtained regarding MuRF1 gene expression compared to C (1.01 ± 0.23-fold): PT50 percent = 0.53 ± 0.20-fold; OA+PT50 percent = 0.55 ± 0.11-fold; PT75 percent = 0.35 ± 0.15-fold; OA+PT75 percent = 0.37 ± 0.08-fold. A short period of OA did not induce skeletal muscle atrophy in the mouse tibialis anterior muscle and aerobic training at low and moderate intensity negatively regulates the atrophy pathway in skeletal muscle of healthy mice or mice with allergic lung inflammation.


Subject(s)
Animals , Male , Mice , Asthma/pathology , Muscle Proteins/analysis , Muscle, Skeletal/chemistry , Muscular Atrophy/pathology , RNA, Messenger/analysis , SKP Cullin F-Box Protein Ligases/analysis , Ubiquitin-Protein Ligases/analysis , Asthma/physiopathology , Chronic Disease , Disease Models, Animal , Gene Expression , Mice, Inbred BALB C , Muscle Fibers, Skeletal/chemistry , Muscle Fibers, Skeletal/pathology , Muscle, Skeletal/pathology , Muscular Atrophy/genetics , Muscular Atrophy/physiopathology , Physical Conditioning, Animal , Pneumonia/metabolism , Pneumonia/pathology , Tibia
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