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Disease Models, Animal / Depression · Journal article
Stress · July 30, 2026
Reinforces what was already believed, rather than introducing something new.
This is a historical commentary establishing that valproic acid's antidepressant-like effects in rodent stress models were first demonstrated in the 1980s, with mechanistic evidence implicating GABA-A receptor enhancement. The findings corroborate the conclusions of a concurrent 2026 meta-analysis of 19 studies (2007–2024) and establish priority for earlier preclinical work.
Journal article. Laboratory rats and mice in depression-like behavioral models (forced swim test, sucrose preference, open field test, novel object recognition).. Intervention: Sub-acute or chronic valproic acid treatment; in mechanistic studies, GABA-A receptor antagonists (bicuculline, picrotoxin) administered as pre-test injections.. Compared with: Historical precedent compared against recent meta-analysis findings (Goudarzi et al., 2026); mechanistic study compared VPA effects with and without GABA-A antagonism..
Valproic acid showed antidepressant-like effects in forced swim test in rats (1988) and mice (1989) VPA-induced passive coping reduction was partially antagonized by GABA-A receptor antagonists bicuculline and picrotoxin, suggesting GABA-A mediation Recent meta-analysis of 19 studies (2007–2024) confirms VPA improves depression-like symptoms including decreased sucrose preference, reduced FST immobility, and improved novel object recognition memory
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
While this commentary confirms the historical precedent of valproic acid's antidepressant-like effects in animal models, it does not provide new efficacy data and should be read as contextual evidence supporting the recent meta-analytic review rather than as primary evidence for clinical translation.
Historical commentary confirming antidepressant-like effects of valproic acid in rodent models first demonstrated in the 1980s, supporting recent meta-analytic findings but not providing new primary evidence.
As stated by the source record.
Quoted from the source exactly as published.
While this commentary confirms the historical precedent of valproic acid's antidepressant-like effects in animal models, it does not provide new efficacy data and should be read as contextual evidence supporting the recent meta-analytic review rather than as primary evidence for clinical translation.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
In a recent review and meta-analysis, Goudarzi et al. (Stress, 2026 Dec 31; 29(1):2641561) show that valproic acid (VPA) exhibits antidepressant (AD)-like effects in several procedures involving the induction of depression-like symptoms by prior sub-chronic or chronic stress in laboratory rats or mice. In their review, the authors included reports of experimental studies (covering only from 2007 to 2024), using several validated depression-like behaviors, such as decreased sucrose preference, increased immobility in the forced swim test (FST), decreased activity in the open field test, and/or impaired novel object recognition memory. The meta-analysis of the 19 included studies showed that sub-chronic/chronic VPA treatment improves most of these depression-like symptoms. The present "Comment" article aims to highlight that the first demonstrations of VPA AD-like and passive coping-reducing effects date back to the 1980s. Our group was the first to demonstrate AD-like effects of sub-acute and chronic VPA treatments in the forced swim test in rats (in 1988). These effects were partially antagonized by pre-test injections of the GABA-A receptor complex antagonists bicuculline and picrotoxin, thus suggesting that VPA-induced passive coping reduction was at least partly mediated by enhancement of GABA-A neurotransmission. Shortly thereafter (1989), the AD-like effects of VPA were confirmed in the FST in mice. These reports from the late 1980s, showing positive effects of VPA on the FST in rats and mice, constitute relevant precedents that further strengthen the profile of AD-like effects of VPA reported by Goudarzi et al.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.