PMID- 33389914 OWN - NLM STAT- MEDLINE DCOM- 20211028 LR - 20220531 IS - 1940-4379 (Electronic) IS - 1050-6934 (Linking) VI - 30 IP - 1 DP - 2020 TI - Safety and Efficacy of Cultured/Noncultured Mesenchymal Stromal Cells without Concurrent Surgery for Knee Osteoarthritis: A Systematic Review of Randomized Controlled Trials. PG - 31-47 LID - 10.1615/JLongTermEffMedImplants.2020035281 [doi] AB - The quantity of studies investigating mesenchymal stromal cells (MSCs) for knee osteoarthritis (OA) treatment is not restricted, unlike the amount of randomized controlled trials (RCTs) that can be found in the literature. MSCs demonstrate a promising potential for safe pain relief of OA, yet indeterminate conclusions prevail due to heterogeneous reporting and study design. By evaluating PubMed and ScienceDirect for RCTs that describe patient-reported outcome measures (PROMs) and adverse events (AEs), we investigate safety and efficacy of MSCs for knee OA unaccompanied by adjuvant surgical intervention. This systematic review is performed in alignment with preferred reported items for systematic reviews and meta-analyses guidelines. In addition to PROMs and AEs, we review included studies for stromal cell variants, follow-up, and imaging modalities, reporting our results in tables and text. Twelve studies that ranged from 1 wk to 4 yr and examined 428 patients and 856 knees met inclusion criteria. Six studies (50%) evaluated bone marrow MSCs, five (42%) evaluated adipose-derived MSCs, and one (8%) evaluated umbilical cord MSCs. All studies reported significant PROM improvement. Mean improvements in the visual analog scale and Western Ontario and McMaster Universities Arthritis Index, ranging from 0 to 40 and 10 to 32 points, respectively, were observed. Of 343 total patients, 135 (39%) experienced AEs. Whereas most AEs involved self-limiting knee swelling and pain, only three (0.8%) were severe enough to require overnight hospitalization. MSCs without adjuvant surgery offer a safe and efficacious conservative treatment option in knee OA patients by alleviating and decreasing pain for up to 12 mo. However, study limitations and contradictory findings require more evidence regarding cartilage repair. FAU - Hall, Michael AU - Hall M AD - University of California, Riverside School of Medicine, 92521 UCR Botanic Gardens Rd, Riverside, CA 92507. FAU - McCafferty, Joseph AU - McCafferty J AD - New York Medical College, School of Medicine, Valhalla, NY 10595. FAU - Agarwalla, Avinesh AU - Agarwalla A AD - Department of Orthopaedic Surgery, Westchester Medical Center, Valhalla, NY 10595. FAU - Nwachuku, Ikenna AU - Nwachuku I AD - University of Southern California, Department of Orthopedic Surgery, 2051 Marengo St., Boyle Heights, Los Angeles County, CA. FAU - Liu, Joseph N AU - Liu JN AD - Department of Orthopaedic Surgery, Loma Linda University Medical Center, Loma Linda, CA 92354. FAU - Amin, Nirav H AU - Amin NH AD - Restore Orthopedics, Orange, CA 92868. LA - eng PT - Journal Article PT - Systematic Review PL - United States TA - J Long Term Eff Med Implants JT - Journal of long-term effects of medical implants JID - 9110830 MH - Humans MH - Injections, Intra-Articular MH - *Mesenchymal Stem Cell Transplantation MH - *Mesenchymal Stem Cells MH - *Osteoarthritis, Knee/surgery MH - Randomized Controlled Trials as Topic MH - Treatment Outcome EDAT- 2021/01/04 06:00 MHDA- 2021/10/29 06:00 CRDT- 2021/01/03 20:44 PHST- 2021/01/03 20:44 [entrez] PHST- 2021/01/04 06:00 [pubmed] PHST- 2021/10/29 06:00 [medline] AID - 32d222c9780a9dce,430201f7322a4ad5 [pii] AID - 10.1615/JLongTermEffMedImplants.2020035281 [doi] PST - ppublish SO - J Long Term Eff Med Implants. 2020;30(1):31-47. doi: 10.1615/JLongTermEffMedImplants.2020035281.