Suicidal thoughts are associated with platelet counts in adolescent inpatients

Area of Science:

• Neuroscience
• Psychiatry
• Hematology

Background:

• Platelets (PLT) are crucial for hemostasis and can model central monoamine turnover.
• PLT counts are being explored as potential circulatory biomarkers for psychiatric disorders.
• However, PLT counts have not been established as peripheral biomarkers for psychopathology.

Purpose of the Study:

• To investigate if platelet counts differ between drug-naïve adolescents with and without suicidal ideation (SI).
• To compare platelet counts in psychiatrically hospitalized adolescents with SI to those without SI and healthy controls.
• To explore the utility of PLT counts as a peripheral biomarker for psychopathology in adolescents.

Main Methods:

• Retrospective analysis of platelet counts in 108 drug-naïve, hospitalized adolescents.
• Comparison of PLT counts between patients with suicidal ideation (SI) and nonsuicidal inpatients (NSI).
• Comparison of PLT counts between SI patients and 77 healthy adolescents (control group).
• Psychiatric diagnoses classified using DSM-IV criteria.

Main Results:

• SI patients exhibited significantly higher PLT counts than NSI patients (300,200±53.3/mL vs. 253,900±53.2/mL, p=0.0001).
• SI patients showed significantly higher PLT counts compared to the healthy control group (300,200±53.3/mL vs. 254,000±52/mL, p<10(-26)).
• Adolescents with conduct/borderline personality disorders and SI had higher PLT counts than those without SI (292,000±55/mL vs. 246,000±64/mL, p=0.001).

Conclusions:

• Hospitalized adolescents experiencing suicidal ideation demonstrate elevated platelet counts.
• These findings suggest that platelet counts may serve as a valuable peripheral biomarker for identifying psychopathology, particularly suicidal ideation, in adolescents.
• Further research is warranted to validate PLT counts as a diagnostic or prognostic tool in psychiatry.