Abstract
Schizophrenia is associated with chronic low-grade inflammation, which has been linked to increased vascular risk and rates of cardiovascular disease. Levels of vascular endothelial growth factor (VEGF), intercellular adhesion molecule-1 (ICAM-1), and vascular cell adhesion molecule-1 (VCAM-1) have been related to aging and neurodegeneration, but their role in schizophrenia remains uncertain. Using a cross-sectional, case–control design, this study included 99 outpatients with schizophrenia and 99 healthy comparison subjects (HCs). Sociodemographic and clinical data were collected, and plasma levels of VEGF, ICAM-1, and VCAM-1 were assayed. A “vascular endothelial index” (VEI) was computed using logistic regression to create a composite measure that maximally differed between groups. General linear models were conducted to examine the possible role of demographic, physical, and lifestyle factors. A linear combination of ICAM-1 and VCAM-1 levels best distinguished the groups, with significantly higher levels of this composite VEI in persons with schizophrenia than HCs. Group differences in the VEI persisted after adjustment for BMI and cigarette smoking. Neither age nor gender was significantly related to the VEI. Schizophrenia patients with higher VEI had earlier age of disease onset, higher systolic and diastolic blood pressure, lower high-density lipoprotein cholesterol, higher insulin resistance, lower levels of mental well-being, and higher Framingham Coronary Heart Disease Risk scores. Schizophrenia is characterized by an elevation of vascular endothelial biomarkers, specifically cell adhesion molecules poised at the intersection between inflammatory response and vascular risk. Interventions aimed at reducing vascular risk may help reduce vascular endothelial abnormalities and prevent cardiovascular morbidity and mortality in schizophrenia.
Similar content being viewed by others
References
Osby U, Westman J, Hallgren J, Gissler M (2016) Mortality trends in cardiovascular causes in schizophrenia, bipolar and unipolar mood disorder in Sweden 1987–2010. Eur J Pub Health 26(5):867–871. doi:10.1093/eurpub/ckv245
Fan Z, Wu Y, Shen J, Ji T, Zhan R (2013) Schizophrenia and the risk of cardiovascular diseases: a meta-analysis of thirteen cohort studies. J Psychiatr Res 47(11):1549–1556. doi:10.1016/j.jpsychires.2013.07.011
Grande I, Magalhães PV, Kunz M, Vieta E, Kapczinski F (2012) Mediators of allostasis and systemic toxicity in bipolar disorder. Physiol Behav 106(1):46–50. doi:10.1016/j.physbeh.2011.10.029
Tomasik J, Rahmoune H, Guest PC, Bahn S (2016) Neuroimmune biomarkers in schizophrenia. Schizophr Res 176(1):3–13. doi:10.1016/j.schres.2014.07.025
Mahendran R, Mahendran R, Chan YH (2004) Interleukin-2 levels in chronic schizophrenia patients. Ann Acad Med Singapore 33(3):320–323
Lee EE, Hong S, Martin AS, Eyler LT, Jeste DV (2016) Inflammation in schizophrenia: cytokine levels and their relationships to demographic and clinical variables. Am J Geriatr Psychiatry 25(1):50–61
Joseph J, Depp C, Martin AS, Daly RE, Glorioso DK, Palmer BW, Jeste DV (2015) Associations of high sensitivity C-reactive protein levels in schizophrenia and comparison groups. Schizophr Res 168(1–2):456–460. doi:10.1016/j.schres.2015.08.019
Khansari N, Shakiba Y, Mahmoudi M (2009) Chronic inflammation and oxidative stress as a major cause of age-related diseases and cancer. Recent Pat Inflamm Allergy Drug Discov 3(1):73–80
Willerson JT, Ridker PM (2004) Inflammation as a cardiovascular risk factor. Circulation 109(21 Suppl 1):II2–II10. doi:10.1161/01.CIR.0000129535.04194.38
Libby P, Ridker PM, Hansson GK (2011) Progress and challenges in translating the biology of atherosclerosis. Nature 473(7347):317–325. doi:10.1038/nature10146
Hotamisligil GS (2006) Inflammation and metabolic disorders. Nature 444(7121):860–867. doi:10.1038/nature05485
Zhou Y, Han W, Gong D, Man C, Fan Y (2016) Hs-CRP in stroke: a meta-analysis. Clin Chim Acta 453:21–27. doi:10.1016/j.cca.2015.11.027
Legein B, Temmerman L, Biessen EA, Lutgens E (2013) Inflammation and immune system interactions in atherosclerosis. Cell Mol Life Sci 70(20):3847–3869. doi:10.1007/s00018-013-1289-1
Hall JR, Wiechmann AR, Johnson LA, Edwards M, Barber RC, Winter AS, Singh M, O’Bryant SE (2013) Biomarkers of vascular risk, systemic inflammation, and microvascular pathology and neuropsychiatric symptoms in Alzheimer’s disease. J Alzheimer’s Dis 35(2):363–371. doi:10.3233/JAD-122359
Liao JK (2013) Linking endothelial dysfunction with endothelial cell activation. J Clin Investig 123(2):540–541. doi:10.1172/JCI66843
Davies MJ, Gordon JL, Gearing AJ, Pigott R, Woolf N, Katz D, Kyriakopoulos A (1993) The expression of the adhesion molecules ICAM-1, VCAM-1, PECAM, and E-selectin in human atherosclerosis. J Pathol 171(3):223–229. doi:10.1002/path.1711710311
Hoeben A, Landuyt B, Highley MS, Wildiers H, Van Oosterom AT, De Bruijn EA (2004) Vascular endothelial growth factor and angiogenesis. Pharmacol Rev 56(4):549–580. doi:10.1124/pr.56.4.3
Kakizawa H, Itoh M, Itoh Y, Imamura S, Ishiwata Y, Matsumoto T, Yamamoto K, Kato T, Ono Y, Nagata M (2004) The relationship between glycemic control and plasma vascular endothelial growth factor and endothelin-1 concentration in diabetic patients. Metabolism 53(5):550–555
Shoamanesh A, Preis SR, Beiser AS, Kase CS, Wolf PA, Vasan RS, Benjamin EJ, Seshadri S, Romero JR (2016) Circulating biomarkers and incident ischemic stroke in the Framingham Offspring Study. Neurology. doi:10.1212/wnl.0000000000003115
Harmey JH (2004) VEGF and cancer. Springer, Berlim
Brandes RP, Fleming I, Busse R (2005) Endothelial aging. Cardiovasc Res 66(2):286–294. doi:10.1016/j.cardiores.2004.12.027
Seals DR, Jablonski KL, Donato AJ (2011) Aging and vascular endothelial function in humans. Clin Sci 120(9):357–375. doi:10.1042/CS20100476
Richter V, Rassoul F, Purschwitz K, Hentschel B, Reuter W, Kuntze T (2003) Circulating vascular cell adhesion molecules VCAM-1, ICAM-1, and E-selectin in dependence on aging. Gerontology 49(5):293–300. doi:10.1159/000071710
Miguel-Hidalgo JJ, Nithuairisg S, Stockmeier C, Rajkowska G (2007) Distribution of ICAM-1 immunoreactivity during aging in the human orbitofrontal cortex. Brain Behav Immun 21(1):100–111
Morisaki N, Saito I, Tamura K, Tashiro J, Masuda M, Kanzaki T, Watanabe S, Masuda Y, Saito Y (1997) New indices of ischemic heart disease and aging: studies on the serum levels of soluble intercellular adhesion molecule-1 (ICAM-1) and soluble vascular cell adhesion molecule-1 (VCAM-1) in patients with hypercholesterolemia and ischemic heart disease. Atherosclerosis 131(1):43–48. doi:10.1016/S0021-9150(97)06083-8
Ewers M, Mielke MM, Hampel H (2010) Blood-based biomarkers of microvascular pathology in Alzheimer’s disease. Exp Gerontol 45(1):75–79. doi:10.1016/j.exger.2009.09.005
Kirkpatrick B, Messias E, Harvey PD, Fernandez-Egea E, Bowie CR (2008) Is schizophrenia a syndrome of accelerated aging? Schizophr Bull 34(6):1024–1032. doi:10.1093/schbul/sbm140
Demerath E, Towne B, Blangero J, Siervogel RM (2001) The relationship of soluble ICAM-1, VCAM-1, P-selectin and E-selectin to cardiovascular disease risk factors in healthy men and women. Ann Hum Biol 28(6):664–678
Chen Y, Osika W, Dangardt F, Gan LM, Strandvik B, Friberg P (2010) High levels of soluble intercellular adhesion molecule-1, insulin resistance and saturated fatty acids are associated with endothelial dysfunction in healthy adolescents. Atherosclerosis 211(2):638–642. doi:10.1016/j.atherosclerosis.2010.03.013
Pillai A, Howell KR, Ahmed AO, Weinberg D, Allen KM, Bruggemann J, Lenroot R, Liu D, Galletly C, Weickert CS, Weickert TW (2016) Association of serum VEGF levels with prefrontal cortex volume in schizophrenia. Mol Psychiatry 21(5):686–692. doi:10.1038/mp.2015.96
Schwarz MJ, Riedel M, Ackenheil M, Müller N (1999) Levels of soluble adhesion molecules in schizophrenia: relation to psychopathology. In: Müller N (ed) Psychiatry, psychoimmunology, and viruses. Springer Vienna, Vienna, pp 121–130. doi:10.1007/978-3-7091-6404-4_13
Schwarz MJ, Riedel M, Ackenheil M, Müller N (2000) Decreased levels of soluble intercellular adhesion molecule-1 (sICAM-1) in unmedicated and medicated schizophrenic patients. Biol Psychiatry 47(1):29–33. doi:10.1016/S0006-3223(99)00206-1
Beumer W, Drexhage RC, De Wit H, Versnel MA, Drexhage HA, Cohen D (2012) Increased level of serum cytokines, chemokines and adipokines in patients with schizophrenia is associated with disease and metabolic syndrome. Psychoneuroendocrinology 37(12):1901–1911. doi:10.1016/j.psyneuen.2012.04.001
Stefanović MP, Petronijević N, Dunjić-Kostić B, Velimirović M, Nikolić T, Jurišić V, Lačković M, Damjanović A, Totić-Poznanović S, Jovanović AA, Ivković M (2016) Role of sICAM-1 and sVCAM-1 as biomarkers in early and late stages of schizophrenia. J Psychiatr Res 73:45–52. doi:10.1016/j.jpsychires.2015.11.002
Al Suwaidi J, Higano ST, Holmes DR Jr, Lennon R, Lerman A (2001) Obesity is independently associated with coronary endothelial dysfunction in patients with normal or mildly diseased coronary arteries. J Am Coll Cardiol 37(6):1523–1528
Schumacher A, Seljeflot I, Sommervoll L, Christensen B, Otterstad J, Arnesen H (2002) Increased levels of markers of vascular inflammation in patients with coronary heart disease. Scand J Clin Lab Invest 62(1):59–68
Steinberg HO, Chaker H, Leaming R, Johnson A, Brechtel G, Baron AD (1996) Obesity/insulin resistance is associated with endothelial dysfunction. Implications for the syndrome of insulin resistance. J Clin Investig 97(11):2601–2610
Coodin S (2001) Body mass index in persons with schizophrenia. Can j Psychiatry Revue 46(6):549–555
de Leon J (1996) Smoking and vulnerability for schizophrenia. Schizophr Bull 22(3):405–409
First M, Spitzer RL, Gibbon M, Williams JB (2002) Structured Clinical Interview for DSM-IV-TR Axis I Disorders, Research Version, Patient Edition With Psychotic Screen (SCID-I/PW/PSY SCREEN) New York: Biometrics Research, New York State Psychiatric Institute; 2002; Biometrics Research. New York State Psychiatric Institute, New York
Amann BL, Canales-Rodriguez EJ, Madre M, Radua J, Monte G, Alonso-Lana S, Landin-Romero R, Moreno-Alcazar A, Bonnin CM, Sarro S, Ortiz-Gil J, Gomar JJ, Moro N, Fernandez-Corcuera P, Goikolea JM, Blanch J, Salvador R, Vieta E, McKenna PJ, Pomarol-Clotet E (2016) Brain structural changes in schizoaffective disorder compared to schizophrenia and bipolar disorder. Acta Psychiatr Scand 133(1):23–33. doi:10.1111/acps.12440
Evans JD, Heaton RK, Paulsen JS, McAdams LA, Heaton SC, Jeste DV (1999) Schizoaffective disorder: a form of schizophrenia or affective disorder? J Clin Psychiatry 60(12):874–882
Sheehan DV, Lecrubier Y, Sheehan KH, Amorim P, Janavs J, Weiller E, Hergueta T, Baker R, Dunbar GC (1998) The Mini-International Neuropsychiatric Interview (M.I.N.I.): the development and validation of a structured diagnostic psychiatric interview for DSM-IV and ICD-10. J Clin Psychiatry 59:22–33
Hong S, Lee EE, Martin AS, Soontornniyomkij B, Soontornniyomkij V, Achim CL, Reuter C, Irwin MR, Eyler LT, Jeste DV (2016) Abnormalities in chemokine levels in schizophrenia and their clinical correlates. Schizophr Res. doi:10.1016/j.schres.2016.09.019
Lee EE, Eyler LT, Wolkowitz OM, Martin AS, Reuter C, Kraemer H, Jeste DV (2016) Elevated plasma F2-isoprostane levels in schizophrenia. Schizophr Res. doi:10.1016/j.schres.2016.06.011
WHO Collaborating Centre for Drug Statistics Methodology (2009) Guidelines for ATC classification and DDD assignment 2010
Andreasen NC (1983) Scale for the assessment of negative symptoms (SANS). University of Iowa, Iowa City
Andreasen NC (1984) Scale for the assessment of positive symptoms (SAPS). University of Iowa, Iowa City
Kroenke K, Spitzer RL (2002) The PHQ-9: a new depression diagnostic and severity measure. Psychiatr Ann 32(9):509–515
Ware Jr JE, Sherbourne CD (1992) The MOS 36-item short-form health survey (SF-36): I. Conceptual framework and item selection. Medical care 30(6):473–483
Parmelee PA, Thuras PD, Katz IR, Lawton MP (1995) Validation of the cumulative illness rating scale in a geriatric residential population. J Am Geriatr Soc 43(2):130–137
Wilson PW, D’Agostino RB, Levy D, Belanger AM, Silbershatz H, Kannel WB (1998) Prediction of coronary heart disease using risk factor categories. Circulation 97(18):1837–1847
D’Agostino RB Sr, Vasan RS, Pencina MJ, Wolf PA, Cobain M, Massaro JM, Kannel WB (2008) General cardiovascular risk profile for use in primary care: the Framingham Heart Study. Circulation 117(6):743–753. doi:10.1161/CIRCULATIONAHA.107.699579
Frydecka D, Misiak B, Pawlak-Adamska E, Karabon L, Tomkiewicz A, Sedlaczek P, Kiejna A, Beszlej JA (2015) Interleukin-6: the missing element of the neurocognitive deterioration in schizophrenia? The focus on genetic underpinnings, cognitive impairment and clinical manifestation. Eur Arch Psychiatry Clin Neurosci 265(6):449–459. doi:10.1007/s00406-014-0533-5
Bulzacka E, Boyer L, Schurhoff F, Godin O, Berna F, Brunel L, Andrianarisoa M, Aouizerate B, Capdevielle D, Chereau-Boudet I, Chesnoy-Servanin G, Danion JM, Dubertret C, Dubreucq J, Faget C, Gabayet F, Le Gloahec T, Llorca PM, Mallet J, Misdrahi D, Rey R, Richieri R, Passerieux C, Roux P, Yazbek H, Leboyer M, Fond G (2016) Chronic peripheral inflammation is associated with cognitive impairment in schizophrenia: results from the multicentric FACE-SZ dataset. Schizophr Bull 42(5):1290–1302. doi:10.1093/schbul/sbw029
Delis DC, Kaplan E, Kramer JH (2001) The Delis–Kaplan executive function system: examiner’s manual. Psychol Corp, San Antonio
Gibbons LE, Carle AC, Mackin RS, Harvey D, Mukherjee S, Insel P, Curtis SM, Mungas D, Crane PK, Alzheimer’s Disease Neuroimaging I (2012) A composite score for executive functioning, validated in Alzheimer’s Disease Neuroimaging Initiative (ADNI) participants with baseline mild cognitive impairment. Brain Imaging Behav 6(4):517–527. doi:10.1007/s11682-012-9176-1
Calvier L, Legchenko E, Grimm L, Sallmon H, Hatch A, Plouffe BD, Schroeder C, Bauersachs J, Murthy SK, Hansmann G (2016) Galectin-3 and aldosterone as potential tandem biomarkers in pulmonary arterial hypertension. Heart 102(5):390–396. doi:10.1136/heartjnl-2015-308365
IBM Corporation (2011) IBM SPSS Statistics for Macintosh, Version 20.0. IBM Corporation, Armonk, NY
Core Team R (2008) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna
Thomas AJ, Davis S, Ferrier IN, Kalaria RN, O’Brien JT (2004) Elevation of cell adhesion molecule immunoreactivity in the anterior cingulate cortex in bipolar disorder. Biol Psychiatry 55(6):652–655. doi:10.1016/j.biopsych.2003.10.015
Kavzoglu SO, Hariri AG (2013) Intracellular adhesion molecule (ICAM-1), vascular cell adhesion molecule (VCAM-1) and E-selectin levels in first episode schizophrenic patients. Bull Clin Psychopharmacol 23(3):204–214
Arolt V, Rothermundt M, Wandinger KP, Kirchner H (2000) Decreased in vitro production of interferon-gamma and interleukin-2 in whole blood of patients with schizophrenia during treatment. Mol Psychiatry 5(2):150–158
Muller N, Ackenheil M, Hofschuster E, Mempel W, Eckstein R (1991) Cellular immunity in schizophrenic patients before and during neuroleptic treatment. Psychiatry Res 37(2):147–160
Steiner J, Jacobs R, Panteli B, Brauner M, Schiltz K, Bahn S, Herberth M, Westphal S, Gos T, Walter M, Bernstein HG, Myint AM, Bogerts B (2010) Acute schizophrenia is accompanied by reduced T cell and increased B cell immunity. Eur Arch Psychiatry Clin Neurosci 260(7):509–518. doi:10.1007/s00406-010-0098-x
Na KS, Jung HY, Kim YK (2014) The role of pro-inflammatory cytokines in the neuroinflammation and neurogenesis of schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 48:277–286. doi:10.1016/j.pnpbp.2012.10.022
Monji A, Kato TA, Mizoguchi Y, Horikawa H, Seki Y, Kasai M, Yamauchi Y, Yamada S, Kanba S (2013) Neuroinflammation in schizophrenia especially focused on the role of microglia. Prog Neuropsychopharmacol Biol Psychiatry 42:115–121. doi:10.1016/j.pnpbp.2011.12.002
Lee BH, Hong JP, Hwang JA, Ham BJ, Na KS, Kim WJ, Trigo J, Kim YK (2015) Alterations in plasma vascular endothelial growth factor levels in patients with schizophrenia before and after treatment. Psychiatry Res 228(1):95–99. doi:10.1016/j.psychres.2015.04.020
Muller V, Szabo A, Viklicky O, Gaul I, Portl S, Philipp T, Heemann UW (1999) Sex hormones and gender-related differences: their influence on chronic renal allograft rejection. Kidney Int 55(5):2011–2020. doi:10.1046/j.1523-1755.1999.00441.x
Noguchi T (1999) Soluble intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 concentrations, and leukocyte count in smokers. Environ Health Prev Med 4(2):71–74. doi:10.1007/bf02931997
Pueyo ME, Gonzalez W, Nicoletti A, Savoie F, Arnal JF, Michel JB (2000) Angiotensin II stimulates endothelial vascular cell adhesion molecule-1 via nuclear factor-kappaB activation induced by intracellular oxidative stress. Arterioscler Thromb Vasc Biol 20(3):645–651
O’Brien KD, McDonald TO, Chait A, Allen MD, Alpers CE (1996) Neovascular expression of E-selectin, intercellular adhesion molecule-1, and vascular cell adhesion molecule-1 in human atherosclerosis and their relation to intimal leukocyte content. Circulation 93(4):672–682
van der Wal AC, Das PK, Tigges AJ, Becker AE (1992) Adhesion molecules on the endothelium and mononuclear cells in human atherosclerotic lesions. Am J Pathol 141(6):1427–1433
Cohen S, Janicki-Deverts D, Doyle WJ, Miller GE, Frank E, Rabin BS, Turner RB (2012) Chronic stress, glucocorticoid receptor resistance, inflammation, and disease risk. Proc Natl Acad Sci USA 109(16):5995–5999. doi:10.1073/pnas.1118355109
Okusaga OO (2014) Accelerated aging in schizophrenia patients: the potential role of oxidative stress. Aging Dis 5(4):256–262. doi:10.14336/AD.2014.0500256
Madamanchi NR, Vendrov A, Runge MS (2005) Oxidative stress and vascular disease. Arterioscler Thromb Vasc Biol 25(1):29–38. doi:10.1161/01.ATV.0000150649.39934.13
Pearson TA, Mensah GA, Alexander RW, Anderson JL, Cannon RO 3rd, Criqui M, Fadl YY, Fortmann SP, Hong Y, Myers GL, Rifai N, Smith SC Jr, Taubert K, Tracy RP, Vinicor F (2003) Markers of inflammation and cardiovascular disease: application to clinical and public health practice: a statement for healthcare professionals from the Centers for Disease Control and Prevention and the American Heart Association. Circulation 107(3):499–511
Dimopoulos N, Piperi C, Salonicioti A, Mitropoulos P, Kallai E, Liappas I, Lea RW, Kalofoutis A (2006) Indices of low-grade chronic inflammation correlate with early cognitive deterioration in an elderly Greek population. Neurosci Lett 398(1–2):118–123. doi:10.1016/j.neulet.2005.12.064
Rafnsson SB, Deary IJ, Smith FB, Whiteman MC, Rumley A, Lowe GD, Fowkes FG (2007) Cognitive decline and markers of inflammation and hemostasis: the Edinburgh Artery Study. J Am Geriatr Soc 55(5):700–707. doi:10.1111/j.1532-5415.2007.01158.x
Elwan O, Madkour O, Elwan F, Mostafa M, Abbas Helmy A, Abdel-Naseer M, Abdel Shafy S, El Faiuomy N (2003) Brain aging in normal Egyptians: cognition, education, personality, genetic and immunological study. J Neurol Sci 211(1–2):15–22
Iga J, Ueno S, Yamauchi K, Numata S, Tayoshi-Shibuya S, Kinouchi S, Nakataki M, Song H, Hokoishi K, Tanabe H, Sano A, Ohmori T (2007) Gene expression and association analysis of vascular endothelial growth factor in major depressive disorder. Prog Neuropsychopharmacol Biol Psychiatry 31(3):658–663. doi:10.1016/j.pnpbp.2006.12.011
Dimopoulos N, Piperi C, Salonicioti A, Mitsonis C, Liappas I, Lea RW, Kalofoutis A (2006) Elevation of plasma concentration of adhesion molecules in late-life depression. Int J Geriatr Psychiatry 21(10):965–971. doi:10.1002/gps.1592
Alexopoulos GS, Meyers BS, Young RC, Campbell S, Silbersweig D, Charlson M (1997) ‘Vascular depression’ hypothesis. Arch Gen Psychiatry 54(10):915–922
Taylor WD, Aizenstein HJ, Alexopoulos GS (2013) The vascular depression hypothesis: mechanisms linking vascular disease with depression. Mol Psychiatry 18(9):963–974. doi:10.1038/mp.2013.20
Wang TJ, Larson MG, Vasan RS, Cheng S, Rhee EP, McCabe E, Lewis GD, Fox CS, Jacques PF, Fernandez C, O’Donnell CJ, Carr SA, Mootha VK, Florez JC, Souza A, Melander O, Clish CB, Gerszten RE (2011) Metabolite profiles and the risk of developing diabetes. Nat Med 17(4):448–453. doi:10.1038/nm.2307
Acknowledgements
This study was supported in part by National Institutes of Health Grant 5R01MH094151-04 (Jeste), UL1 RR031980 for the UCSD Clinical and Translational Research Institute, the VA Desert-Pacific Mental Illness Research Education and Clinical Center and Office of Academic Affiliations (Nguyen, Eyler), and UC San Diego Stein Institute for Research on Aging. We thank Benchawanna Soontornniyomkij, Ph.D., for her help with the assays of the vascular biomarkers, and Rebecca Daly for her major contributions to data management for the project. Parts of these results were presented at the annual conference of the American College of Neuropsychopharmacology in Hollywood, FL, on December 7, 2016.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
Additional information
Dilip V. Jeste and Lisa T. Eyler: Co-senior authors.
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Nguyen, T.T., Dev, S.I., Chen, G. et al. Abnormal levels of vascular endothelial biomarkers in schizophrenia. Eur Arch Psychiatry Clin Neurosci 268, 849–860 (2018). https://doi.org/10.1007/s00406-017-0842-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00406-017-0842-6