Mark B Zimering1,2, Joseph A Behnke3, Smita Thakker-Varia3, Janet Alder3. 1. Medical Service, Department of Veterans Affairs New Jersey Health Care System, Lyons, New Jersey, USA. 2. Division of Endocrinology, Rutgers-Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA. 3. Department of Neuroscience and Cell Biology, Rutgers-Robert Wood Johnson Medical School, Piscataway, New Jersey, USA.
Abstract
AIM: Diabetic depression increases in association with microvascular complications. We tested a hypothesis that circulating autoantibodies having anti-endothelial and anti-neuronal properties increase in subsets of diabetes with co-morbid depression. METHODS: Protein-A eluates from plasma of 20 diabetic depression patients and 30 age-matched controls were tested for effects on endothelial cell survival, neurite outgrowth in rat pheochromocytoma (PC12) cells, or process extension and survival in adult rat dentate gyrus neural progenitor cells. The protein-A eluates from depressed or non-depressed, diabetic patients were injected (via intracerebroventricular route) into mice and 7-10 days later behavioral tests (sucrose preference, and tail suspension tests) were conducted to determine whether the autoantibodies induced anhedonia or despair. RESULTS: Diabetic depression (n=20) autoantibodies caused a significant inhibition of PC12 cell neurite outgrowth (P<0.001) or endothelial cell proliferation compared to autoantibodies in control, diabetic (n=20) or non-diabetic (n=10) patients without depression. Process extension and survival in adult rat dentate gyrus neural progenitor cells was significantly reduced (P<0.001) by diabetic depression autoantibodies (n= 11) compared to the effects from similar concentrations (5-7 μg/mL) of autoantibodies in diabetic (n=12) or non-diabetic patients without depression (n=7). Ten micromolar concentrations of Y27632, a selective Rho-Associated Protein Kinase (ROCK) inhibitor, significantly prevented (P<0.0001) neural progenitor cell process retraction induced by diabetes depression autoantibodies (n=5). Mice treated with diabetic depression autoantibodies (n=16 from two different patients' autoantibodies) exhibited significantly reduced (P=0.027) sucrose preference (anhedonia) compared to mice treated with diabetic control autoantibodies (n=16 from two different patients' autoantibodies). CONCLUSION: These data suggest that autoantibodies in a subset of older adult diabetic depression inhibit endothelial cell survival, and impair process extension and survival in adult dentate gyrus neural progenitor cells in vitro.
AIM: Diabetic depression increases in association with microvascular complications. We tested a hypothesis that circulating autoantibodies having anti-endothelial and anti-neuronal properties increase in subsets of diabetes with co-morbid depression. METHODS: Protein-A eluates from plasma of 20 diabetic depression patients and 30 age-matched controls were tested for effects on endothelial cell survival, neurite outgrowth in rat pheochromocytoma (PC12) cells, or process extension and survival in adult rat dentate gyrus neural progenitor cells. The protein-A eluates from depressed or non-depressed, diabetic patients were injected (via intracerebroventricular route) into mice and 7-10 days later behavioral tests (sucrose preference, and tail suspension tests) were conducted to determine whether the autoantibodies induced anhedonia or despair. RESULTS: Diabetic depression (n=20) autoantibodies caused a significant inhibition of PC12 cell neurite outgrowth (P<0.001) or endothelial cell proliferation compared to autoantibodies in control, diabetic (n=20) or non-diabetic (n=10) patients without depression. Process extension and survival in adult rat dentate gyrus neural progenitor cells was significantly reduced (P<0.001) by diabetic depression autoantibodies (n= 11) compared to the effects from similar concentrations (5-7 μg/mL) of autoantibodies in diabetic (n=12) or non-diabetic patients without depression (n=7). Ten micromolar concentrations of Y27632, a selective Rho-Associated Protein Kinase (ROCK) inhibitor, significantly prevented (P<0.0001) neural progenitor cell process retraction induced by diabetes depression autoantibodies (n=5). Mice treated with diabetic depression autoantibodies (n=16 from two different patients' autoantibodies) exhibited significantly reduced (P=0.027) sucrose preference (anhedonia) compared to mice treated with diabetic control autoantibodies (n=16 from two different patients' autoantibodies). CONCLUSION: These data suggest that autoantibodies in a subset of older adult diabetic depression inhibit endothelial cell survival, and impair process extension and survival in adult dentate gyrus neural progenitor cells in vitro.
Authors: I Vlodavsky; Z Fuks; R Ishai-Michaeli; P Bashkin; E Levi; G Korner; R Bar-Shavit; M Klagsbrun Journal: J Cell Biochem Date: 1991-02 Impact factor: 4.429
Authors: S Saoncella; F Echtermeyer; F Denhez; J K Nowlen; D F Mosher; S D Robinson; R O Hynes; P F Goetinck Journal: Proc Natl Acad Sci U S A Date: 1999-03-16 Impact factor: 11.205
Authors: S J Evans; P V Choudary; C R Neal; J Z Li; M P Vawter; H Tomita; J F Lopez; R C Thompson; F Meng; J D Stead; D M Walsh; R M Myers; W E Bunney; S J Watson; E G Jones; H Akil Journal: Proc Natl Acad Sci U S A Date: 2004-10-13 Impact factor: 11.205
Authors: T J M Wijnhoven; M J W van den Hoven; H Ding; T H van Kuppevelt; J van der Vlag; J H M Berden; R A Prinz; E J Lewis; M Schwartz; X Xu Journal: Diabetologia Date: 2007-12-06 Impact factor: 10.122