About this trial
This randomized, double-blind, placebo-controlled Phase 2 study evaluates whether pentadecapeptide BPC 157 (BPC-157), an investigational peptide, can speed structural healing and functional recovery after an acute grade II hamstring muscle strain. Participants will receive BPC 157 or placebo for 14 days in addition to a standardized rehabilitation program. The co-primary endpoints are time to return to unrestricted sport and change in MRI-assessed injury volume at Day 14.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age 18 to 45 years.
Acute posterior thigh pain consistent with hamstring strain with onset within 72 hours prior to screening.
MRI-confirmed grade II hamstring strain of the biceps femoris, semitendinosus, or semimembranosus, with measurable lesion.
Pre-injury physical activity >= 3 sessions/week or participation in organized recreational sport.
Disqualifiers
Grade III hamstring tear, tendon avulsion, or injury requiring surgical management.
Concomitant lower extremity injury that would interfere with rehabilitation or outcome assessment.
Prior hamstring strain on the index limb within the past 6 months.
Use of systemic corticosteroids, anabolic agents, platelet-rich plasma, stem-cell products, or investigational peptides/growth factors within 30 days prior to screening.
Trial design
Parallel
Treatments tested in this trial
Pentadecapeptide BPC 157
Drugsubcutaneous injection (administered by trained study staff). Schedule: once daily for 14 days.
Placebo
Drugsubcutaneous injection (administered by trained study staff). Schedule: once daily for 14 days.
Treatment groups
Trial outcomes
Primary outcomes
Time to return to unrestricted sport participation (days)
defined as clearance by a blinded sports medicine clinician and completion of a standardized functional performance battery without pain-limited stopping.
Change from baseline to Day 14 in MRI-assessed hamstring injury volume (cm^3), measured by blinded central radiology review.
Secondary outcomes
Change in pain during activity on a 0-10 Numeric Rating Scale (NRS; 0 = no pain, 10 = worst pain).
Hamstring strength limb symmetry index (LSI) by isokinetic dynamometry
Change in Lower Extremity Functional Scale (LEFS; 0-80, higher scores indicate better function)
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