Erythropoietin in Spinocerebellar Ataxia Type 2: Feasibility and Proof-of-Principle Issues from a Randomized Controlled Study.

BACKGROUND: Several pieces of evidence have shown the neurotrophic effect of erythropoietin (EPO) and its introduction in the therapeutic practice of neurological diseases. However, its usefulness in the treatment of spinocerebellar ataxia type 2 (SCA2) has not been proven despite the fact that it is endogenously reduced in these patients. OBJECTIVE: The study aims to investigate the safety, tolerability, and clinical effects of a nasally administered recombinant EPO in SCA2 patients. METHODS: Thirty-four patients were enrolled in this double-blind, randomized, placebo-controlled, phase I-II clinical trial of the nasally administered human-recombinant EPO (NeuroEPO) for 6 months. The primary outcome was the change in the spinocerebellar ataxia functional index (SCAFI), while other motor, neuropsychological, and oculomotor measures were assessed. RESULTS: The 6-month changes in SCAFI score were slightly higher in the patients allocated to NeuroEPO treatment than placebo in spite of the important placebo effect observed for this parameter. However, saccade latency was significantly decreased in the NeuroEPO group but not in placebo. The frequency and severity of adverse events were similar between both groups, without evidences of hematopoietic activity of the drug. CONCLUSIONS: This study demonstrated the safety and tolerability of NeuroEPO in SCA2 patients after 6 months of treatments and suggested a small clinical effect of this drug on motor and cognitive abnormalities, but confirmatory studies are warranted. © 2022 International Parkinson and Movement Disorder Society.

Efficacy of Sertraline in Patients With Major Depressive Disorder Naive to Selective Serotonin Reuptake Inhibitors: A 10-Week Randomized, Multicenter, Placebo-Controlled, Double-Blind, Academic Clinical Trial.

PURPOSE: The aim of this study was to assess the efficacy and safety of sertraline compared with placebo in a good clinical practice trial conducted with major depressive disorder patients naive to selective serotonin reuptake inhibitors. METHODS: This was a 10-week randomized, multicenter, placebo-controlled, double blind, superiority trial. Adult patients diagnosed with major depressive disorder (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria), total score of 19 to 36 in the 17-item Hamilton Depression Rating Scale (HAMD-17), were randomly allocated to sertraline (n = 39) or placebo (n = 38). Each patient received a fixed dose of sertraline 50 mg/d or placebo for 4 weeks. Afterward a flexible dose up to 200 mg/d was allowed if needed. The primary efficacy end point was clinical response defined as 50% score reduction in HAMD-17 at 10 weeks relative to baseline. Supplementary analysis was performed on HAMD-17 score change from baseline. FINDINGS: The clinical response favored sertraline (72% vs 32%; relative risk, 2.27; 95% confidence interval, 1.37-3.78; P = 0.0006). A linear mixed model showed arm × time interaction was significant (likelihood ratio test χ on 7 df = 48.42, P < 0.0001). The HAMD-17 change score favored sertraline from week 8 onwards. The most frequent adverse events in the sertraline arm were headache, diarrheas, and weight loss. IMPLICATIONS: In this trial, the benefit of sertraline compared with placebo appeared later than usual. The therapeutic process with a close doctor-patient relationship throughout the trial and the effect expectancy due to a new treatment might explain the response delay. TRIAL REGISTRATION: RPCEC, ID no. 00000128.

Recombinant streptokinase vs phenylephrine-based suppositories in acute hemorrhoids, randomized, controlled trial (THERESA-3).

AIM: To compare the efficacy and safety of recombinant streptokinase (rSK) and phenylephrine-based suppositories in acute hemorrhoidal disease. METHODS: A multicenter (14 sites), randomized (1:1), open, parallel groups, active controlled trial was done. After inclusion, subjects with acute symptoms of hemorrhoids, who gave their written, informed consent to participate, were centrally randomized to receive, as outpatients, rSK (200000 IU) or 0.25% phenylephrine suppositories, which had different organoleptic characteristics. Treatment was administered by the rectal route, one unit every 6 h during 48 h for rSK, and up to a maximum of 5 d (20 suppositories) for phenylephrine. Evaluations were performed at 3, 5 and 10 d post-inclusion. The main end-point was the 5(th)-day complete clinical response (disappearance of pain and edema, and ≥ 70% reduction of the lesion size). Time to response and need for thrombectomy were secondary efficacy variables. Adverse events were evaluated too. RESULTS: 5(th) day complete response rates were 83/110 (75.5%) and 36/110 (32.7%) with rSK and phenylephrine suppositories, respectively. This 42.7% difference (95%CI: 30.5-54.2) was highly significant (P < 0.001). The advantage was detected since the early 3(rd) day evaluation (37.3% vs 6.4% for the rSK and active control groups, respectively; P < 0.001) and was kept even at the late 10(th) day assessment (83.6% vs 58.2% for rSK and phenylephrine, respectively; P < 0.001). Time for complete response was significantly shorter (P = 0.031; log-rank test) in the rSK group (median: 4.9 d; 95%CI: 4.8-5.0) with respect to the active control (median: 9.8 d; 95%CI: 9.8-10.0). Thrombectomy was necessary in 1/59 and 8/57 patients with baseline thrombosis in the rSK and phenylephrine groups, respectively (P = 0.016). There were no adverse events attributable to the experimental treatment. CONCLUSION: rSK suppositories showed a significant advantage over a widely used over-the-counter phenylephrine preparation for the treatment of acute hemorrhoidal illness, with an adequate safety profile.

Efecto placebo en depresión. Resultados de un ensayo clínico en Cuba / Placebo response in depression. Results from a clinical trial in Cuba

Se realizó una revisión de aspectos relacionados con la depresión y el empleo de placebos en ensayos clínicos en esta enfermedad, considerando la Declaración de Helsinki y los criterios de las agencias reguladoras de Estados Unidos y Europa. Además, se analizaron las causas que pueden haber influido en la elevada respuesta a placebo encontrada en un ensayo clínico coordinado por el Centro Nacional Coordinador de Ensayos Clínicos en Cuba (CENCEC). Entre ellas se destacan: la remisión espontánea de los síntomas, la severidad de la depresión, la elevada expectativa de pacientes e investigadores, las evaluaciones sistemáticas, entre otras. Concluimos que la elevada tasa de respuesta en el grupo placebo reduce la potencia de los ensayos clínicos y que se necesitan nuevas estrategias para reducir las fuentes de variabilidad. Teniendo en cuenta que en depresión se observa una respuesta a placebo superior que en el resto de las enfermedades, sería justificable su empleo en la evaluación de nuevos antidepresivos, siempre y cuando no se afecten la seguridad y la integridad del paciente

Some aspects related with depression and the use of placebo in clinical trials were reviewed considering the Declaration of Helsinki and the criteria exposed by the regulatory agencies from Europe and United States. The possible reasons that could have influenced the high placebo response observed in a clinical trial coordinated by the National Coordinating Centre for Clinical Trials in Cuba (CENCEC) were also analyzed. Among then: spontaneous remission of symptoms, severity of depression, high expectancy from patients and raters, systematic evaluations, etc. We concluded that the high level of placebo response reduces the power of clinical trials and that it is necessary to find new strategies in order to decrease the sources of variability. Considering that in depression it is common to observe a placebo response higher than the rest of diseases, it could be justifiable to use it in the evaluation of new antidepressants if it does not affect the safety and integrity of the patients