ABSTRACT
The dexamethasone suppressed and normal wound healing effect of ethanolic extract of leaves of Hyptis suaveolens (L) poit. (EEHS) at 400mg/kg and 800mg/kg was studied in Wistar rats. Two wound models viz. incision and excision wounds were used in this study. The parameters studied were breaking strength in case of incision wounds, period of epithelization and wound contraction in case of excision wound. The dexamethasone treated group showed a significant (P<0.05) reduction in the wound breaking strength in incision type of wound model and significant increase in epithelization period and reduction in percentage of wound contraction in excision type of wound model as compared to control group. Extract treated groups showed significant (P<0.05) improvement in all the wound healing parameters of incision and excision wound models as compared to control. In incision wound model, Co administration of EEHS at both the dosage levels with dexamethasone had significantly (P<0.05) increased the wound breaking strength as compared to dexamethasone only treated group and was seen more at dosage level of 400mg/kg. Similarly, in excision wound model, there was significant improvement (P<0.05) in both the parameters when EEHS was co administered with dexamethasone as compared to dexamethasone only treated group but improvement was more at dosage level of 800mg/kg.
ABSTRACT
En modelos experimentales los corticoides redujeron la gravedad del proceso inflamatorio del espacio subaracnoideo, causante de complicaciones de meningitis bacteriana. Su uso se ha propuesto como medicación coadyuvante para disminuir las muertes, secuelas neurológicas e hipoacusia post meningitis. Numerosos estudios efectuados informaron resultados contradictorios en cuanto su eficacia. En el presente trabajo se analizó la evidencia actual de los corticoides como medicación coadyuvante en meningitis bacteriana en pediatría. Material y métodos: la búsqueda se realizó en MEDLINE, Cochrane Library, motores de búsqueda Google y Yahoo de artículos publicados en los últimos 5 años. De los 28 artículos que encontramos con las palabras claves steroids AND bacterial meningitis, 9 constituyen esta revisión. Resultados: ninguno de los 5 trabajos que analizaron la mortalidad encontró que la dexametasona la disminuía al compararlo con placebo. Los corticoides tampoco disminuían las secuelas neurológicas en los 3 artículos que trataron esta complicación. Los corticoides estaban asociados a menor tasa de hipoacusia que el placebo en meningitis por Haemophilus influenzae en 3 trabajos, no así en otros 4. Conclusiones: no hay evidencia que los corticoides prevengan la muerte o las secuelas neurológicas en niños con meningitis. Los efectos protectores en la audición son contradictorios y no existe evidencia firme que apoye su uso. El análisis de esta complicación es particularmente complejo dado los diferentes niveles de evidencia, de metodología de estudios, de evaluaciones audiométricas y de poblaciones disímiles en cuanto a acceso a servicios de salud y situación sanitaria (AU)
In experimental models dexamethasone, reduces the severity of inflammation in de subarachnoid space responsible for complications of bacterial meningitis. Dexamethasone has been proposed as adjuvant therapy to reduce postmeningitis, death, neurologic sequelae and hearing loss. Numerous studies have been performed, but contradictory results have been reported regarding its efficacy. We analyzed the current evidence of steroids as adjuvant therapy in children with bacterial meningitis. Material and methods: we reviewed the MEDLINE database, Cochrane Library, Yahoo and Google search engines for articles published in the last 5 years. We found 28 articles that matched the keywords "steroids" and "bacterial meningitis" and narrowed the analysis to 9 articles containing adequate evidence. Results: mortality rates were not reduced with dexamethasone compared to placebo in the 5 articles that addressed this endpoint. Neither were neurologic sequelae reduced with steroids in the 3 articles that addressed this outcome. Steroids were associated with prevention of post meningitis hearing loss in 3 studies, but not in the other 4. Conclusions: there is no current evidence that steroids prevent death or neurologic sequelae after bacterial meningitis in children. The protective properties of steroids in hearing loss are contradictory and no firm evidence favors their use. Different levels of evidence, different methodological studies, audiometric evaluation, and dissimilar health care and sanitary conditions, make the analysis of this endpoint particularly complex (AU)
Subject(s)
Humans , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Dexamethasone/therapeutic use , Meningitis, Bacterial/complications , Meningitis, Bacterial/drug therapy , Adrenal Cortex Hormones/therapeutic use , Hearing Loss/prevention & control , Meningitis, Bacterial/mortality , Anti-Bacterial Agents/therapeutic useABSTRACT
Bacterial endophthalmitis is an ocular emergency that requires rapid diagnosis and therapeutic decision making. The introdection of intravitreal injection of antibiotics has been a major advancement because it has resulted in a marked improvement in visual outcome. The intravitreal injection of steroids may be potentially useful in the treatment of endophthalmitis and other ocular inflammatory diseases. Forty eyes of pigmented rabbits were used, and divided into two groups. Group I was eyes without vitrectomy. In the right eye, 100 microliter of 1mgvancomycin, 400 microliter amikacin and 400 microliter dexamethasone injected was done. Group II was eyes with vitrectomy and lensectomy. At 2 weeks after lens and vitreous removal, rabbit eyes received an injection of a combination of 1mg vancomycin, 400 microliter amikacin and 400 microliter dexamethasone in right eye and BSS in left eye. The effect of combination injection was examined by light and transmission, scanning electron microscope at 3 days, 1 week, 2 weeks and 6 weeks following injection. The injection of combination without vitrectomy produced no toxicity. After injections of either combination or BSS after vitrectomy, macrophages were observed on the surface of retinal pigment epithelium and disorganized outer segments. This finding seems to be produced by vitrectomy procedure rather than drug toxicity. These results supports the hypothesis that the injection of these combinations is not toxic to aphakic/vitrectomized eyes.