1. Enhanced levels of non-enzymatic glycation and pentosidine crosslinking in spontaneous osteoarthritis progression 
T.L. Willett, R. Kandel, J.N.A. De Croos, N.C. Avery, M.D. Grynpas 
Osteoarthritis and Cartilage 
Volume 20, Issue 7, Pages (July 2012)
DOI: /j.joca
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1
Mean pentosidine contents from the experimental groups and reference values from pilot work and the literature. Error bars represent one standard deviation. A great increase in pentosidine content was measured in the PBS + Ribose injected knees relative to all other groups (P < 0.0001). The value met the reference value for human cartilage from an 80-year old28,31. Additionally, an expected and statistically detectable increase in pentosidine content was measured between 3 months of age and 9 months of age (P < 0.001). The age-dependent increase is also seen in dog and human cartilage31. The value for HGP (Hartley guinea pig) meniscus represents the mean amount measured in our pilot work using menisci from 1-year-old male retired breeders.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
OARSI-HISTOgp histological scores (mean ± standard deviation) for the four experimental groups. Controls (3 m) = 3-month-old controls (±n = 4). Controls (9 m) = 9-month-old age-matched controls (n = 4), PBS = PBS injected group (n = 10), PBS + Ribose = PBS+2.0 M Ribose injected group (n = 10). No effect was detected due to injection (of either PBS or PBS + Ribose; P = 0.158) nor was an interaction detected (P = 0.236). The scores from the PBS injected group were higher than the PBS + Ribose group (P = 0.0244) and the 9-month-old control group. * indicates that the mean score from the 3-month control group was lower than the older groups (P < 0.01) as expected.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

4. Fig. 3
Example histological sections (Safranin-O stained with Fast Green counter stain) from the controls and treatment groups. A = 3-month-old controls, B = 9-month-old controls, C = left contra-lateral control from PBS injected group, D = right injected specimen from PBS injected group, E = left contra-lateral control from PBS + Ribose group, F = right injected specimen from PBS + Ribose group.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

5. Fig. 4
Body mass data (mean ± standard deviation) for the three groups (age-matched controls, PBS injected, PBS + Ribose injected). The PBS + Ribose group consistently gained less mass than the PBS group.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions