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Biomarkers of Delirium in a Low-Risk Community-Acquired Pneumonia-Induced Sepsis

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Abstract

There are different theories about the pathophysiology of sepsis-associated encephalopathy (SAE), and the majority of our knowledge was derived from critically ill patients. 7In less severe sepsis, it is probable that neuroinflammation can be a major aspect of SAE development. We hypothesized that in non-severe septic patients, blood biomarkers of inflammation, endothelial activation, coagulation, and brain function would be different when compared to patients with and without brain dysfunction. A total of 30 patients presenting with community-acquired pneumonia (CAP)-induced sepsis were included of which 10 (33 %) developed SAE. Eight medical patients admitted to the general ward, except due to sepsis or infection, which developed delirium were included as delirium, non-sepsis group. From all measured biomarkers, only brain-derived neurotrophic factor (BDNF), regulated upon activation normal T cell expressed, and presumably secreted (RANTES), and interleukin (IL)-10 where significantly different when compared to SAE and sepsis groups. In addition, SAE patients presented higher levels of BDNF, vascular cellular adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1), platelet-derived growth factor (PDGF)-AB/BB and RANTES when compared to delirium patients. In conclusion, the profile of biomarkers differs between SAE, sepsis, and delirium patients, suggesting that pathways related to SAE are different from delirium and from sepsis itself.

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Acknowledgments

The Translational Psychiatry Program (USA) is funded by the Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston (UTHealth) Medical School. Laboratory of Neurosciences and Laboratório de Fisiopatologia Experimental (Brazil) are part of the centers of the National Institute for Molecular Medicine (INCT-MM) and the Center of Excellence in Applied Neurosciences of Santa Catarina (NENASC).

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Authors and Affiliations

  1. Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Unidade Acadêmica de Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil

    Cristiane Damiani Tomasi, Francieli Vuolo, Jaqueline Generoso, Cristiane Ritter & Felipe Dal-Pizzol

  2. D’Or Institute for Research and Education, Rio de Janeiro, Brazil

    Márcio Soares

  3. Post-graduation Program, Instituto Nacional de Câncer, Rio de Janeiro, Brazil

    Márcio Soares

  4. Translational Psychiatry Program, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston (UTHealth), McGovern Medical School, Houston, TX, USA

    Tatiana Barichello & João Quevedo

  5. Intensive Care Unit, Hospital São José, Av Universitária, 1105, Criciúma, 88806000, SC, Brazil

    Cristiane Ritter & Felipe Dal-Pizzol

  6. Departamento de Clínica Médica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

    Felipe Dal-Pizzol

  7. Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston (UTHealth), McGovernMedical School, Houston, TX, USA

    Tatiana Barichello & João Quevedo

  8. Neuroscience Graduate Program, The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA

    Tatiana Barichello & João Quevedo

  9. Laboratory of Neurosciences, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil

    Tatiana Barichello & João Quevedo

Authors
  1. Cristiane Damiani Tomasi
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  2. Francieli Vuolo
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  3. Jaqueline Generoso
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  4. Márcio Soares
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  5. Tatiana Barichello
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  6. João Quevedo
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  7. Cristiane Ritter
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  8. Felipe Dal-Pizzol
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Corresponding author

Correspondence to Felipe Dal-Pizzol.

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The Institutional Review Board of São José Hospital approved the study, and all subjects gave written informed consent.

Role of Funding Source

None of the funding source has role in study design or any scientific decision about the conduction of the study.

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The authors have nothing to disclose.

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Tomasi, C.D., Vuolo, F., Generoso, J. et al. Biomarkers of Delirium in a Low-Risk Community-Acquired Pneumonia-Induced Sepsis. Mol Neurobiol 54, 722–726 (2017). https://doi.org/10.1007/s12035-016-9708-6

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  • DOI: https://doi.org/10.1007/s12035-016-9708-6

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