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Platelet-Rich Plasma for Erectile Dysfunction After Radical Prostatectomy

2026年11月2日 更新者: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

調査の概要

状態

まだ募集していません

条件

介入・治療

詳細な説明

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.

研究の種類

介入

入学 (推定)

100

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

40年~75年 (大人、高齢者)

健康ボランティアの受け入れ

いいえ

受講資格のある性別

男

説明

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)

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:ダブル

武器と介入

参加者グループ / アーム
介入・治療
実験的: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

他の名前:
  • PRP
  • 多血小板血漿
他の: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.

他の名前:
  • プラセボ

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Change in IIEF-EF score from baseline to 1 month after the final treatment session
時間枠: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

二次結果の測定

結果測定
メジャーの説明
時間枠
Change in IIEF-EF score at 1 month after the final treatment session - per-protocol analysis
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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)
時間枠: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
時間枠: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

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

捜査官

  • 主任研究者:Mikkel Fode, MD, PhD、Herlev and Gentofte Hospital

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年10月15日

一次修了 (推定)

2028年8月1日

研究の完了 (推定)

2029年11月1日

試験登録日

最初に提出

2026年10月2日

QC基準を満たした最初の提出物

2026年10月2日

最初の投稿 (実際)

2026年10月7日

学習記録の更新

投稿された最後の更新 (実際)

2026年11月3日

QC基準を満たした最後の更新が送信されました

2026年11月2日

最終確認日

2026年11月1日

詳しくは

本研究に関する用語

その他の研究ID番号

  • H-25034065

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

医薬品およびデバイス情報、研究文書

米国FDA規制医薬品の研究

いいえ

米国FDA規制機器製品の研究

いいえ

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