Posts by:
Gabriella True

Cytokine Effects on the Basal Ganglia and Dopamine Function: the Subcortical Source of Inflammatory Malaise

Felger JC, Miller AH. Cytokine effects on the basal ganglia and dopamine function: the subcortical source of inflammatory malaise. Front Neuroendocrinol. 2012 Aug;33(3):315-27. doi: 10.1016/j.yfrne.2012.09.003. Epub 2012 Sep 21. PMID: 23000204; PMCID: PMC3484236.

  • Cytokines released during inflammation target the basal ganglia and dopamine
  • Cytokines can disrupt dopamine function by effects on synthesis, packaging, release, and reuptake
  • Cytokine effects on basal ganglia dopamine may cause anhedonia, fatigue, and psychomotor slowing
  • Cytokines may contribute to behavioral disorders associated with chronic inflammation
PANDAS/PANS in the COVID-19 Age: Autoimmunity and Epstein–Barr Virus Reactivation as Trigger Agents?
Pallanti S, Di Ponzio M. PANDAS/PANS in the COVID-19 Age: Autoimmunity and Epstein-Barr Virus Reactivation as Trigger Agents? Children (Basel). 2023 Mar 30;10(4):648. doi: 10.3390/children10040648. PMID: 37189896; PMCID: PMC10136983.
“Herein, we discuss the results of studies that specifically reported data about the impact of the COVID-19 pandemic or infection on children with Pediatric Acute-Onset Neuropsychiatric Disorders (PANS). Furthermore, we present the cases of five adolescents with PANS whose symptomatology increased following SARS-CoV-2 infection. What emerged from this study was that COVID-19 resulted in the exacerbation of obsessions, tics, anxiety and mood symptoms and decreased wellbeing. Moreover, new symptoms, as well as new PANS cases, are reported to have arisen after COVID-19 infection. Here, we hypothesize that the pathogenic mechanisms of silent viruses, such as the Epstein–Barr virus, are related to neuroinflammation, immune responses and reactivation, with additional roles played by social-isolation-related inflammatory processes. The discussion of PANS, which represents a model of immune-mediated neuropsychiatric manifestations, is particularly relevant, with the aim of uncovering the mechanisms that lead to neuropsychiatric Post-Acute COVID-19 Syndrome (PACS). Prospects for future studies and treatment implications are discussed.”

Persistent SARS-CoV-2 Infection, EBV, HHV-6 and Other Factors May Contribute to Inflammation and Autoimmunity in Long COVID
Vojdani A, Vojdani E, Saidara E, Maes M. Persistent SARS-CoV-2 Infection, EBV, HHV-6 and Other Factors May Contribute to Inflammation and Autoimmunity in Long COVID. Viruses. 2023 Jan 31;15(2):400. doi: 10.3390/v15020400. PMID: 36851614; PMCID: PMC9967513.
“Based on our review of the literature, in both past and recent studies, we have found clues to these mechanisms that might drive this long COVID, with the goal of identifying host or virus factors that can be intervened upon to prevent or reverse this condition. A better understanding of these immunological mechanisms in patients with severe long COVID holds great promise for designing treatment strategies to minimize viral persistence, control the reactivation of latent viruses, and to modulate a dysregulated immune system and host microbiota, which together are involved in the virus-induced inflammation and autoimmunity that are observed in patients with long COVID.”
Deep clinical phenotyping of patients with obsessive-compulsive disorder: an approach towards detection of organic causes and first results

Runge, K., Reisert, M., Feige, B. et al. Deep clinical phenotyping of patients with obsessive-compulsive disorder: an approach towards detection of organic causes and first results. Transl Psychiatry 13, 83 (2023). https://doi.org/10.1038/s41398-023-02368-8

A relevant number of organic OCD forms (in 16%) were identified, which in 5% of all patients lead to successful treatment with immunotherapies. The frequent presence of autoantibodies such as anti-TPO or ANA further support the possible influences of autoimmune processes in OCD [16]. Further findings may well have modulatory effects on the course of the disease (e.g., substitution of folic acid deficiency). In addition, these findings might have a positive influence on the disease concept and self-image of affected patients and their relatives. The establishment of diagnostic regimens such as FDP-OCD should be evaluated in larger prospective and controlled studies. This could allow for a specific treatment of a small subgroup of patients with identified organic OCD reducing treatment resistance.