Table 2.

Summary of previous and current reports for comparison of synovial MSCs between RA and OA patients

Author	Jones [15]	Skalska [17]	Koizumi [18]	Kohno
Sample number	RA (n = 45) OA (n = 11)	RA (n = 24) OA (n = 18)	RA (n = 13) OA (n = 6)	RA (n = 8) OA (n = 8)
RA synovium collection method	Biopsy with arthroscopy	TKA	TKA, arthroplasty for forefoot, synovectomy for hand	TKA
Passage number for analysis	Passage 3	Passage 4	Passage 2–4	Passage 0
Comparison between RA and OA	Surface epitopes: similar	Surface epitopes: similar	Gene expression: similar	Nucleated cell number: similar
	Chondro: RA < OA	Chondro: similar	In vitro and in vivo	Yields: similar
			Chondro: similar	Surface epitopes: similar
				Chondro: similar
CRP	0–15(mg/dl)	0.5–8 (mg/dl)	0–0.3 (mg/dl)	0–6 (mg/dl)

RA rheumatoid arthritis, OA osteoarthritis, TKA total knee arthroplasty, Chondro chondrogenesis, CRP C-reactive protein