Safety and Efficacy of Umbilical Cord Mesenchymal Stem Cell Local Intramuscular Injection for Treatment of Uterine Scars
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|ClinicalTrials.gov Identifier: NCT02968459|
Recruitment Status : Recruiting
First Posted : November 18, 2016
Last Update Posted : February 21, 2020
|Condition or disease||Intervention/treatment||Phase|
|Uterine Scar||Other: Umbilical cord MSCs Other: 0.9% Saline||Phase 2|
In recent decades, the percentage of Cesarean section (CS) deliveries has dramatically increased around the world. While it allows safe delivery in many situations, the risks of severe maternal complications associated with cesarean delivery are higher than those associated with vaginal delivery. These maternal complications include short term, long-term, the next pregnancy, and the non-pregnant state, such as abnormal uterine bleeding and postmenstrual spotting.
Uterine niche, also named cesarean scar defect, deficient cesarean scar, pouch, or diverticulum, is defined as a triangular anechoic structure at the site of the scar or a gap in the myometrium at the site of a previous caesarean section. It is one of the most common complications associated with previous cesarean section. The primary clinical manifestation is postmenstrual spotting, which may seriously affect the daily life of patients. The treatment includes medical treatment, such as oral contraceptives, and surgical methods, such as hysteroscopy resectoscopic correction, endometrial ablation, laparoscopic surgery, and transvaginal repair surgery. Although good outcomes are reported in each study, present treatments could not decrease the incidence among women after undergoing cesarean section.
Mesenchymal stem cells (MSCs) are long-lived cells with the ability of both self-renewal and differentiation into multi-potential cells, such as osteoblasts, adipocytes and smooth muscle cells. Trials with MSCs in patients after myocardial infarction have shown an excellent safety and efficacy. In this trial, the investigators postulate that MSCs can reduce uterine niche and convert scar tissue to viable myometrium. To test the hypothesis, the investigators therefore undertake a Phase II clinical trial of the treatment for uterine niche among primiparous women who undergo cesarean section.
This is a randomized, double-blind, placebo-controlled clinical trial designed to investigate the efficacy and safety of umbilical cord mesenchymal stem cells treatment on the caesarean section uterine scars. A total of one hundred and twenty (120) participants will be randomized (1:1) to receive direct local intramuscular injection of 1*10^7 MSCs (a dose of 1*10^7 cells in 1 ml of 0.9% saline) (MSCs group) or an identical-appearing 1ml of 0.9% saline placebo (placebo-controlled group). Cesarean procedures and care will follow usual practices. All participants will be performed by obstetricians from the investigators' department using a unified double-layer uterine closure technique with a continuous absorbable polyglycolic 1-0 suture. After suturing the uterine incision, direct local intramuscular injection will be performed in the uterine incision as soon as possible on the operating table. One ml solution will be injected as twenty aliquots of 0.05ml into each injection site on the incision. Injection sites will be selected near the incision at evenly 20 different sites. Participants will be followed up at 6 weeks, 3 months and 6 months. For the purpose of the endpoint analysis and safety evaluations, the investigators will utilize an "intention-to-treat" study population.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||120 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Official Title:||A Phase II, Randomized, Double-Blind, Placebo-Controlled Study of the Safety and Efficacy of Umbilical Cord Mesenchymal Stem Cell Local Intramuscular Injection for Treatment of Uterine Scars|
|Estimated Study Start Date :||May 2020|
|Estimated Primary Completion Date :||October 2021|
|Estimated Study Completion Date :||April 2022|
Experimental: Umbilical cord MSCs Group
1*10^7 Umbilical cord MSCs
Other: Umbilical cord MSCs
Participants will receive direct local intramuscular injection of 1*10^7 MSCs (in 1ml of 0.9% saline) in the uterine incision.
Placebo Comparator: Placebo-Controlled Group
1ml of 0.9% saline
Other: 0.9% Saline
Participants will receive direct local intramuscular injection 1ml of 0.9% saline in the uterine incision.
- Number of participants with uterine niche [ Time Frame: 6 months post treatment ]The niche is defined as a triangular anechoic area at the presumed site of incision in the uterus by transvaginal utrasonography.
- Change of uterine scar thickness [ Time Frame: 6 weeks, 3 and 6 months post treatment ]The scar thickness be measured using a transvaginal utrasonography
- Change of uterine scar area [ Time Frame: 6 weeks, 3 and 6 months post treatment ]The scar area will be measured using a transvaginal utrasonography
- Number of participants with endometritis [ Time Frame: 6 months post treatment ]Endometritis is defined as the presence of at least two of the following signs with no other recognized cause: fever (temperature of at least 38℃), abdominal pain, uterine tenderness, or purulent drainage from the uterus.
- Number of participants with wound infection [ Time Frame: 6 months post treatment ]Wound infection is defined as the presence of either superficial or deep incisional surgical-site infection characterized by cellulitis or erythema and induration around the incision or purulent discharge from the incision site with or without fever and included necrotizing fasciitis.
- Immunoglobulin concentrations in breast milk and serum [ Time Frame: 6 weeks, 3 and 6 months post treatment ]Breast milk and serum immunoglobulin (IgG, IgA, IgM) and the complement (C3, C4) are detected by transmission immune turbidity method using automatic biochemical analyzer.
- Adverse events occurrence [ Time Frame: 6 months post treatment ]Adverse events will be evaluated since the baseline visit until 6 months after the end of the treatment.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02968459
|Contact: Zhengping Liu, MD||+ 86 757 email@example.com|
|Contact: Dazhi Fan, MD||+ 86 757 firstname.lastname@example.org|
|Maternal and Child Health Hospital of Foshan||Recruiting|
|Foshan, Guangdong, China, 528000|
|Contact: Deqin Jia, BD + 86 757 82969772 email@example.com|
|Sub-Investigator: Dazhi Fan, MD|
|Principal Investigator:||Zhengping Liu, MD||Maternal and Child Health Hospital of Foshan|