Estudios primarios incluidos en esta revisión sistemática

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Estudio primario

No clasificado

Revista BMC complementary and alternative medicine
Año 2007
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ANTECEDENTES: La eficacia y seguridad de un suplemento dietético derivado del Sur botánicos de América se ha comparado con el sulfato de glucosamina en pacientes con artrosis en una con sede en Mumbai multicéntrico, aleatorizado, doble-ciego. MÉTODOS: Los sujetos (n = 95) fueron seleccionados y asignados aleatoriamente a recibir sulfato de glucosamina (n = 47, 1500 mg / día) o Reparagen (n = 48, 1800 mg / día), que consiste en un poliherbal de 300 mg de Vincaria (Uncaria guianensis ) y 1500 mg de INR 249 (Lepidium meyenii), administrado por vía oral, dos veces al día. Variable de eficacia primaria fue la tasa de respuesta basada en una mejora del 20% en las puntuaciones de dolor WOMAC. Los resultados adicionales fueron WOMAC para el dolor, la rigidez y la función, escala visual analógica (EVA) para el dolor, con las evaluaciones a los 1, 2, 4, 6 y 8 semanas. La tolerancia, el investigador y el sujeto evaluaciones mundiales y el consumo de medicación de rescate (paracetamol) se midieron junto con la evaluación de seguridad, incluyendo los signos vitales y los ensayos de laboratorios. RESULTADOS: La asignación al azar de los sujetos fue efectiva: la distribución por edad, sexo y estado de la enfermedad fue similar en ambos grupos. Las tasas de respuesta (20% de reducción en el dolor WOMAC) fueron importantes tanto para la glucosamina (89%) y Reparagen (94%) y con el apoyo de las evaluaciones del investigador y el sujeto. Usando relacionados con las tasas de respuesta criterios para Reparagen fueron favorables en comparación con la glucosamina. En comparación a los valores basales de ambos tratamientos mostraron beneficios significativos en WOMAC y los resultados de la EVA dentro de una semana (P <0,05), con una mejora similar, progresiva a lo largo del protocolo de la semana 8 de tratamiento (45-62% de reducción en las puntuaciones de WOMAC o EVA) . La tolerabilidad fue excelente, sin acontecimientos adversos graves se observaron parámetros de seguridad y se mantuvieron sin cambios. El uso de medicación de rescate fue significativamente menor en el grupo Reparagen (p <0,01) en cada período de evaluación. Séricos de IGF-1 no se modificaron por los tratamientos. CONCLUSIÓN: El sulfato de glucosamina y Reparagen producido mejoras sustanciales en el dolor, la rigidez y la función en pacientes con osteoartritis. Las tasas de respuesta eran altas y el perfil de seguridad fue excelente, con un uso significativamente menos medicación de rescate con Reparagen. Reparagen representa una nueva alternativa natural productivo en la gestión de la salud de las articulaciones. El registro de ensayos: Current Controlled Trials ISRCTN25438351.

Estudio primario

No clasificado

Revista Journal of inflammation (London, England)
Año 2005
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Background: This study was designed to determine if a natural mineral supplement, sierrasil, alone and in combination with a cat's claw extract (Uncaria guianensis), vincaria, has therapeutic potential in mild to moderate osteoarthritis of the knee. Methods: Patients (n = 107) with mild to moderate osteoarthritis of the knee were randomly assigned to one of 4 groups; high dose sierrasil (3 g/day), low dose sierrasil (2 g/day), low dose sierrasil (2 g/day) + cat's claw extract (100 mg/day) or placebo, administered for 8 weeks. Treatment was double blinded. Primary efficacy variables were WOMAC scores (A, B, C and total). Visual analog score (VAS) for pain, consumption of rescue medication (paracetamol), and tolerability were secondary variables. Safety measures included vital signs and laboratory-based assays. Results: Ninety-one of the 107 patients successfully completed the protocol. All four groups showed improvement in WOMAC and VAS scores after 8 weeks (p < 0.001), in all 3 groups receiving sierrasil the magnitude of benefits were greater vs. placebo (WOMAC Total 38-43% vs. 27%) but this was not statistically significant. In reference to baseline values sierrasil treated groups had a considerably faster onset of benefits. Placebo-treated individuals failed to show significant benefits at 4 weeks (11% reduction in total WOMAC). In contrast, after 1 or 2 weeks of therapy all the sierrasil groups displayed significant reductions in WOMAC scores (p < 0.05) and at week 4 displayed a 38-43% improvement. VAS was significantly improved at 4 weeks in all groups (p < 0.001) but was significantly greater in all sierrasil groups compared to placebo (p < 0.05). Rescue medication use was 28-23% lower in the herbomineral combination and high dose sierrasil groups although not statistically different from placebo (P = 0.101 and P = 0.193, respectively). Tolerability was good for all groups, no serious adverse events were noted and safety parameters remained unchanged. Conclusion: The natural mineral supplement, sierrasil alone and in combination with a cat's claw extract, improved joint health and function within 1-2 weeks of treatment but significant benefits over placebo were not sustained, possibly due to rescue medication masking. Sierrasil may offer an alternative therapy in subjects with joint pain and dysfunction. © 2005 Miller et al; licensee BioMed Central Ltd.

Estudio primario

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Revista Archives of Iranian Medicine
Año 2005
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ABSTRACT: BACKGROUND: Ginger (Zingiber officinale) extract supplementation has been shown to improve the severity of symptoms and decrease the nonsteroidal antiinflammatory drug (NSAID) requirements in patients with osteoarthritis (OA). OBJECTIVE: To assess the effects of ginger extract as an alternative to NSAIDs and as a supplement drug in the symptomatic treatment of OA. METHODS: Between April and October 2002, 120 outpatients with OA of moderate to severe pain, requiring only the use of NSAIDs, were enrolled into a double-blind, randomized, placebo- controlled clinical trial. These patients were randomized into three groups of 40, including the placebo (PL), ginger extract (GE), and ibuprofen (IBP) groups. After a washout period of one week (week 0), patients received either 30 mg ginger extract in two 500 mg capsules, placebo, or three 400 mg ibuprofen tablets daily for one month. Acetaminophen tablet was prescribed as a rescue analgesic during the study. The clinical assessments included a visual analog scale (VAS) for pain, gelling pain, joint swelling measurement, and joint motion slope measurement. Joint motion slope was measured by goniometry (normal = 130°, limited = 120°, and very limited = 110°). RESULTS: The improvement of symptoms (defined as reduction in the mean change) was superior in the ginger extract and ibuprofen groups than the placebo group. VAS scores and gelling or regressive pain after rising the scores were significantly higher in the PL group than both the GE and IBP groups, a month after the treatment (P < 0.0001). However, there was no significant difference in VAS and gelling pain scores between the ginger extract and the ibuprofen groups. CONCLUSION: Ginger extract and ibuprofen were significantly more effective than the placebo in the symptomatic treatment of OA, while there was no significant difference between the ginger extract and ibuprofen groups in a test for multiple comparison.

Estudio primario

No clasificado

Revista European journal of clinical nutrition
Año 2004
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OBJECTIVE: To investigate in a double-blind placebo-controlled, parallel group study, the effects of a nutrient supplement, containing, among other ingredients, the omega-3 fatty acids eicosapentaenoic acid (1.4 g EPA), docosahexaenoic acid (0.211 g DHA), omega-6 fatty acid gamma-linolenic acid (0.5 g GLA) and micronutrients in patients with active rheumatoid arthritis (RA). DESIGN, SUBJECTS AND INTERVENTION: RA patients were randomized to receive either daily liquid nutrient supplementation or placebo for 4 months. The primary end point was the change in tender joint count at 2 and 4 months. Other clinical variables included swollen joint count, visual analogue scales for pain and disease activity, grip strength, functionality score and morning stiffness. Biochemical parameters included plasma concentrations of PUFA and vitamins C and E. SETTING: Outpatient university clinic. RESULTS: In all, 66 patients enrolled, 55 completed the study. No significant change from baseline in tender joint count or any of the other clinical parameters was detected in either group. Patients receiving nutrient supplementation, but not those receiving placebo, had significant increases in plasma concentrations of vitamin E (P=0.015), and EPA, DHA and docosapentaenoic acid concomitant with decreases of arachidonic acid (P=0.01). Intergroup differences for PUFA and vitamin E were significantly different (P=0.01 and 0.03, respectively). CONCLUSIONS: This double-blind, placebo-controlled study in RA patients did not show superior clinical benefit of daily nutrient supplementation with EPA, GLA and micronutrients at the doses tested as compared to placebo. The study adds information regarding doses of omega-3 fatty acids, below which anti-inflammatory effects in RA are not seen.

Estudio primario

No clasificado

Revista The Journal of international medical research
Año 2004
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We investigated the effects of a low n-6 fatty acid (FA) diet supplemented with fish oil on serum pro-inflammatory cytokine concentrations and clinical variables in patients with active rheumatoid arthritis (RA). Sixty patients were randomly assigned to receive a diet low in n-6 FAs and n-3 FAs supplement (fish oil group), a diet low in n-6 FAs and placebo (placebo group), or no special diet or intervention (control group). Serum cytokines and clinical and biochemical variables were evaluated at baseline and various timepoints. At week 18 the fish oil group had significant reductions in linoleic acid, C-reactive protein (CRP) and soluble tumour necrosis factor receptor p55 (sTNF-R p55), and significant elevations in eicosapentaenoic acid and docosahexaenoic acid compared with baseline. There were no significant differences in the clinical variables between the three groups. At week 24 there were significant reductions in interleukin-6 and TNF-alpha in the fish oil and placebo groups. Supplementation with n-3 FA and a low n-6 FA intake decreased serum sTNF-R p55 and CRP levels in patients with RA.

Estudio primario

No clasificado

Autores Jaswal S , Mehta HC , Sood AK , Kaur J
Revista Clinica chimica acta; international journal of clinical chemistry
Año 2003
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BACKGROUND: Oxygen free radicals have been implicated as mediators of tissue damage in patients of rheumatoid arthritis (RA). This study was designed to elucidate plasma oxidant/antioxidant status in rheumatoid arthritis, with the aim of evaluating the importance of antioxidant therapy in the management of this disease. METHODS: The study included 40 patients of rheumatoid arthritis who were randomly divided into two subgroups of 20 each. One group received conventional treatment for 12 weeks and in the other group conventional treatment was supplemented with antioxidants for the same duration. Twenty age- and sex-matched normal individuals constituted the control group. Blood samples of controls and patients were collected at the time of presentation and analyzed for total thiols, glutathione, vitamin C and malondialdehyde (MDA-marker of oxidative stress). The investigations were repeated in the patients after 12 weeks. RESULTS: The blood concentrations of total thiols, glutathione and vitamin C were found to be significantly lower in rheumatoid arthritis patients as compared to healthy controls, while the concentrations of MDA were much higher. There was a statistically significant increase in the posttreatment concentrations of these antioxidants, along with a decrease in the concentrations of MDA. CONCLUSIONS: The antioxidant defense system is compromised in rheumatoid arthritis patients. There is a shift in the oxidant/antioxidant balance in favor of lipid peroxidation, which could lead to the tissue damage observed in the disease. The results suggest the necessity for therapeutic co-administration of antioxidants along with conventional drugs to such patients. However, due to the limited number of cases included in this study, more studies may be required to substantiate the results and arrive at a definite conclusion, in terms of safety and efficacy of adding on antioxidant therapy for the treatment of RA.

Estudio primario

No clasificado

Autores Wigler I , Grotto I , Caspi D , Yaron M
Revista Osteoarthritis and cartilage / OARS, Osteoarthritis Research Society
Año 2003
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OBJECTIVE: Evaluation of the effect of a ginger extract (Zintona EC) on patients suffering from gonarthritis. MATERIAL AND METHODS: Twenty-nine patients (6 men and 23 women) with symptomatic gonarthritis (ACR criteria), in the age range 42-85 years, were included after randomization in a double blind, placebo controlled, crossover study of 6 months' duration. The treatment group was given a ginger extract (250 mg of Zingiberis Rhizoma per capsule, qid), while the placebo group received the same number of identical looking capsules per day. The crossover occurred after 3 months of therapy. Results were evaluated by a 100mm visual analog scale (VAS) of pain on movement and of handicap. RESULTS: Eight patients dropped out because of inefficacy, three from group 1 (ginger extract first) and five from group 2 (placebo first). One patient from group 1 and one from group 2 dropped out because of heartburn (while they were on ginger extract). Twenty patients completed the study period of 24 weeks and 19 that of 48 weeks follow-up. By the end of 24 weeks there was a highly statistically significant difference between the VAS of pain and handicap of the two groups (P<0.001). However, at crossover both groups showed a statistically significant decrease in VAS of pain on movement and of handicap, but the differences between the groups did not reach statistical significance. CONCLUSIONS: Zintona EC was as effective as placebo during the first 3 months of the study, but at the end of 6 months, 3 months after crossover, the ginger extract group showed a significant superiority over the placebo group.

Estudio primario

No clasificado

Autores Mur E , Hartig F , Eibl G , Schirmer M
Revista The Journal of rheumatology
Año 2002
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OBJETIVO: Evaluar la seguridad y la eficacia clínica de un extracto de la planta de la quimiotipo pentacíclico de Uncaria tomentosa (UT) en pacientes con artritis reumatoide activa (AR). MÉTODO: Cuarenta pacientes sometidos a tratamiento de sulfasalazina o hidroxicloroquina se inscribieron en un estudio aleatorizado 52 semanas, 2 estudio de fase. Durante la primera fase (24 semanas, doble ciego, controlado con placebo), los pacientes fueron tratados con el extracto de UT o placebo. En la segunda fase (28 semanas) todos los pacientes que recibieron el extracto de la planta. RESULTADOS: Veinte y cuatro semanas de tratamiento con el extracto de UT resultó en una reducción del número de articulaciones dolorosas en comparación con placebo (un 53,2% frente al 24,1%, p = 0,044). Los pacientes que recibieron el extracto de UT solamente durante la segunda fase experimentaron una reducción en el número de dolor (p = 0,003) y la tumefacción articular (p = 0,007) y el Índice de Ritchie (p = 0,004) en comparación con los valores después de las 24 semanas de placebo. Sólo los efectos secundarios menores se observaron. CONCLUSIÓN: En este pequeño estudio preliminar demuestra una relativa seguridad y el beneficio modesto para el recuento de articulaciones dolorosas de un extracto altamente purificado de la quimiotipo pentacíclico de UT en pacientes con AR activa que toman sulfasalazina o hidroxicloroquina.

Estudio primario

No clasificado

Revista The Journal of rheumatology
Año 2002
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OBJETIVO: Para determinar si la vitamina E afecta el cambio en el volumen de cartílago en pacientes con osteoartritis de la rodilla (OA). MÉTODOS: En un estudio doble ciego placebo controlados, 136 pacientes con OA de la rodilla (Colegio Americano de Reumatología criterios clínicos y radiológicos) fueron aleatorizados para recibir vitamina E (500 UI) o placebo durante 2 años. volumen del cartílago tibial se midió mediante imágenes de resonancia magnética al principio y al final del estudio. RESULTADOS: Las características basales fueron similares en los dos grupos (67 vitamina E, 69 con placebo), había más mujeres en el grupo de vitamina E, de 42 años (63%) vs 33 (48%) en el grupo placebo. Ciento diecisiete pacientes (59 vitamina E, 58 con placebo) completaron el estudio. La pérdida del cartílago tibial medial y lateral fue similar en pacientes tratados con vitamina E y un placebo (media + / - SD: media 157 + / - 209 vs 187 + / - 220 m3 micro con placebo, p = 0,51; laterales 186 + / - 258 vs 251 + / - 216 m3 micro, p = 0,19). No hubo diferencias significativas entre la vitamina E y placebo en los grupos tratados con mejoría de los síntomas desde el inicio. niveles dietéticos de antioxidantes (vitamina C, beta caroteno, equivalentes de retinol) no tuvo ningún efecto sobre la pérdida de cartílago volumen. CONCLUSIÓN: La vitamina E no parece tener un efecto beneficioso en el tratamiento de la artrosis de rodilla: no afecta a la pérdida de cartílago volumen o síntomas.