Table 2. Proteins associated with NPDR and PDR that were reported in vitreous.

Protein name	Saliva	Vitreous
Alpha-1-antitrypsin (SERPINA1)	Elevated in PDR	Elevated in moderate and severe PDR (Gao et al., 2008; Kanwar & Kowluru, 2009; Hazra et al., 2012)
Alpha-2-macroglobulin	Elevated in PDR	Elevated in severe PDR (Gao et al., 2008; Kanwar & Kowluru, 2009; Hazra et al., 2012)
Alpha-enolase	Elevated in PDR	Present in control and moderate PDR (Kanwar & Kowluru, 2009; Hazra et al., 2012)
Apolipoprotein A-I	Elevated in PDR	Elevated in moderate and severe PDR (Gao et al., 2008; Kanwar & Kowluru, 2009; Hazra et al., 2012)
Catalase	Elevated in PDR	Present in XDR and PDR (Gao et al., 2008; Kanwar & Kowluru, 2009)
Clusterin	Elevated in PDR	Present in vitreous (esp. moderate and severe PDR (Gao et al., 2008; Hazra et al., 2012); decreased in PDR (Kadoglou et al., 2005)
Complement C3	Elevated in PDR	Elevated in moderate PDR (Gao et al., 2008; Hazra et al., 2012)
Cystatin-C	Elevated in PDR	Present in vitreous (control, moderate and severe PDR) (Gao et al., 2008; Hazra et al., 2012)
Fructose-bisphosphate aldolase C	Elevated in PDR	Present in XDR (Gao et al., 2008)
Galectin-3-binding protein	Elevated in PDR	Elevated in severe PDR (Gao et al., 2008; Hazra et al., 2012)
Gelsolin	Elevated in PDR	Present in moderate and severe PDR (Hazra et al., 2012)
Glyceraldehyde-3-phosphate dehydrogenase	Elevated in PDR	Decreased in PDR (Kadoglou et al., 2005); present in control and moderate PDR (Hazra et al., 2012)
Haptoglobin	Elevated in PDR	Present in vitreous (esp. severe PDR) (Gao et al., 2008; Kanwar & Kowluru, 2009; Hazra et al., 2012)
Hemoglobulin subunit alpha	Elevated in PDR	Elevated in PDR (Gao et al., 2008)
Hemopexin	Elevated in PDR	Elevated in XDR (Gao et al., 2008; Kadoglou et al., 2005),32]; present in control, moderate and severe PDR (Kanwar & Kowluru, 2009; Hazra et al., 2012)
Peroxiredoxin-1	Decreased in NPDR	Elevated in PDR (Gao et al., 2008); present in control (Hazra et al., 2012)
Protein S100-A8	Elevated in PDR	Present in XDR and PDR (Gao et al., 2008)
Protein S100-A9	Elevated in PDR	Present in XDR and PDR (Gao et al., 2008)