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Platelet-Rich Plasma for Erectile Dysfunction After Radical Prostatectomy

3 de novembro de 2026 atualizado por: Mikkel Fode, Herlev and Gentofte Hospital

Treatment of Erectile Dysfunction After Radical Prostatectomy With Platelet-Rich Plasma Injections: a Randomized Controlled Trial

This study will test whether injections of platelet-rich plasma (PRP) can improve erectile function in men with persistent erectile dysfunction (ED) at least 12 months after nerve-sparing radical prostatectomy for prostate cancer. Participants will be randomly assigned to receive either two PRP injections or two saline (placebo) injections into the penis, administered one month apart in a double-blind fashion. Erectile function will be assessed using the International Index of Erectile Function (IIEF) questionnaire at baseline and at 1, 3, 6, and 12 months after the last injection. The primary objective is to determine whether PRP improves the erectile function domain of the IIEF more than saline at one month after the last injection

Visão geral do estudo

Status

Recrutamento

Condições

Intervenção / Tratamento

Descrição detalhada

Erectile dysfunction is common after nerve-sparing radical prostatectomy and may persist despite recovery from the initial nerve injury. Platelet-rich plasma (PRP) is prepared from autologous blood and contains growth factors that may promote angiogenesis and tissue regeneration. Preclinical studies suggest that PRP may improve erectile function after cavernous nerve injury, but PRP remains an experimental treatment, and no published study has specifically evaluated its effect in men with erectile dysfunction following radical prostatectomy.

The hypothesis is that intracavernosal PRP injections improve erectile function more than saline injections in men with erectile dysfunction persisting 1-3 years after nerve-sparing radical prostatectomy.

Eligible participants will be stratified according to unilateral or bilateral nerve-sparing surgery and randomized 1:1 to receive two intracavernosal injections of either autologous PRP or saline, administered one month apart. An unblinded team member who has no direct interaction with participants will prepare the injections. The participant and the physician administering the injection will remain blinded to treatment allocation. Syringes will be covered with opaque material to maintain blinding.

Blood will be collected before each injection in all participants. For participants assigned to PRP, the blood will be used to prepare the treatment. For the first 10 participants assigned to saline, PRP will also be prepared and analysed to verify the platelet concentration achieved with the preparation procedure. Blood collected from the remaining participants assigned to saline will be discarded.

Participants must discontinue other treatments for erectile dysfunction for four weeks before baseline and until the assessment one month after the last injection. Thereafter, other treatments for erectile dysfunction will be permitted and recorded.

Erectile function and other study outcomes will be assessed at baseline and at 1, 3, 6, and 12 months after the last injection. The primary outcome is the between-group difference in change from baseline in the erectile function domain of the International Index of Erectile Function at one month after the last injection.

Tipo de estudo

Intervencional

Inscrição (Estimado)

100

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

40 anos a 75 anos (Adulto, Adulto mais velho)

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Macho

Descrição

Inclusion Criteria:

  • Age 40-75 years
  • Underwent unilateral or bilateral nerve-sparing radical prostatectomy between 1 and 3 years prior to the study
  • Good erectile function prior to surgery (IIEF-EF score ≥ 22)
  • Erectile dysfunction at inclusion with an IIEF-EF score < 22 without aids
  • Acceptance of a pause in other treatments for erectile dysfunction from 4 weeks before baseline (wash-out) until the 1-month follow-up after the last injection
  • In a stable relationship lasting at least 6 months with a desire for sexual activity
  • Able to understand and accept the study protocol

Exclusion Criteria:

  • Known psychiatric, neurological and/or endocrinological disease requiring medication (including hypogonadism with total testosterone <12 nmol/l).
  • Severe urinary incontinence preventing sexual activity (assessed by a physician at inclusion)
  • Clinical or biochemical recurrence of prostate cancer
  • Other surgery or radiation therapy in the pelvic region
  • Severe cardiac disease in the form of unstable angina, NYHA class >II heart failure, uncontrolled arrhythmia, or severe symptomatic and/or significant valvular disease
  • Use of anti-androgen medication
  • Peyronie's disease and/or previous episodes of priapism
  • Excessive alcohol consumption (more than 21 units per week)

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Dobro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Platelet Rich Plasma (PRP)

A volume of 5 mL PRP will be administered in corpus cavernosum on two occasions, with a 1-month interval between injections

A volume of 5 mL PRP will be administered in corpus cavernosum on two occasions, with a 1-month interval between injections

Outros nomes:
  • PRP
  • Plasma rico em plaquetas
Outro: Saline Solution (Placebo)

A volume of 5 mL saline solution will be administered in corpus cavernosum on two occasions, with a 1-month interval between injections.

A volume of 5 mL saline solution will be administered in corpus cavernosum on two occasions, with a 1-month interval between injections.

Outros nomes:
  • Placebo

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Change in IIEF-EF score from baseline to 1 month after the final treatment session
Prazo: From baseline to 1 month post the last intervention

Change in the erectile function (EF) domain score of the International Index of Erectile Function (IIEF) from baseline to 1 month after the final treatment session. The change in IIEF-EF score will be compared between the PRP and saline groups using an intention-to-treat analysis.

From baseline to 1 month post the last intervention

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Change in IIEF-EF score at 1 month after the final treatment session - per-protocol analysis
Prazo: From baseline to 1 month post the last intervention

Change in the erectile function (EF) domain score of the International Index of Erectile Function (IIEF) from baseline to 1 month after the final treatment session. The change in IIEF-EF score will be compared between the PRP and saline groups using a per-protocol analysis.

From baseline to 1 month post the last intervention
Change in IIEF-EF score at 3, 6, and 12 months after the final treatment session
Prazo: From baseline to 12 months post the last intervention

Change in the erectile function (EF) domain score of the International Index of Erectile Function (IIEF) from baseline to 3, 6, and 12 months after the final treatment session. Analyses will be performed using both intention-to-treat and per-protocol populations, comparing the PRP and saline groups.

From baseline to 12 months post the last intervention
Analyses of participants achieving a clinically significant improvement in IIEF-EF score at 1, 3, 6, and 12 months
Prazo: From baseline to 12 months post the last intervention

Intention-to-treat and per-protocol analyses of the proportion of participants achieving clinically significant improvements in IIEF-EF at 1, 3, 6, and 12 months following the final treatment session with PRP or saline. Clinically significant improvement is defined according to Rosen et al. as an increase of 2 points for mild ED, 5 points for moderate ED, and 7 points for severe ED

From baseline to 12 months post the last intervention
Change in IIEF domain scores at 1, 3, 6, and 12 months
Prazo: From baseline to 12 months post the last intervention

Changes in the remaining domains of the International Index of Erectile Function (IIEF): orgasmic function, sexual desire, intercourse satisfaction, and overall satisfaction. As no minimum clinically important difference has been established for these domains, changes in domain scores will be analysed as continuous variables and compared between the PRP and saline groups.

From baseline to 12 months post the last intervention
Participant satisfaction after treatment
Prazo: From baseline to 12 months post last intervention

Subjective participant satisfaction following treatment, assessed using the Global Satisfaction Question. This analysis will be performed according to the intention-to-treat principle.

From baseline to 12 months post last intervention
Use of additional treatments for erectile dysfunction
Prazo: Until 12 months post last intervention.

Use of additional treatments for erectile dysfunction during the study period, including oral medication, intraurethral treatment, intracavernosal injections, vacuum erection devices, and penile implants. The use of additional treatments will be compared between the PRP and saline groups.

Until 12 months post last intervention.
Treatment effect according to baseline severity of erectile dysfunction, evaluated by the International Index of Erectile Function-Erectile Function (IIEF-EF)
Prazo: From baseline to 12 months post last intervention

Subgroup analyses of treatment effects according to severity of erectile dysfunction at baseline (International Index of Erectile Function-Erectile Function (IIEF-EF), recorded just before the first injection). These analyses will be considered exploratory and hypothesis-generating.

From baseline to 12 months post last intervention
Adverse events following treatment
Prazo: From baseline to 12 months post last intervention

Incidence and type of adverse events following PRP and saline injections during the study period. All adverse events will be recorded and described in the final study manuscript.

From baseline to 12 months post last intervention

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Investigadores

  • Investigador principal: Mikkel Fode, MD, PhD, Herlev and Gentofte Hospital

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

10 de novembro de 2026

Conclusão Primária (Estimado)

1 de agosto de 2028

Conclusão do estudo (Estimado)

1 de novembro de 2029

Datas de inscrição no estudo

Enviado pela primeira vez

2 de outubro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

2 de outubro de 2026

Primeira postagem (Real)

7 de outubro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

6 de novembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

3 de novembro de 2026

Última verificação

1 de novembro de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • H-25034065

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .