What markers track working memory?
Working memory is tracked with behavioural assays (Y-maze, novel object recognition, attentional set-shifting) and with molecular markers including SIRT1, CREB-BDNF signalling, and mitochondrial bioenergetics. This page
What markers track working memory?
Working memory is tracked in the research literature through two broad classes of marker: behavioural performance on validated tasks, and molecular or physiological correlates measured in the same animals or participants. The behavioural class includes spatial working memory as assessed by the Y-maze, recognition memory as assessed by the novel object recognition task, and cognitive flexibility as assessed by the attentional set-shifting task (ASST) [3][5]. The molecular class includes sirtuin 1 (SIRT1) as a predicted upstream regulator in hippocampus, CREB-BDNF signalling activity, cytokine expression, reactive oxygen species (ROS) accumulation, mitochondrial membrane potential, and mitochondrial respiratory capacity [4][5].
The work centres on hippocampal and frontal cortical circuits, with the mechanistic literature converging on mitochondrial bioenergetics and neuroinflammatory signalling as the pathways most often reported alongside working-memory readouts [4][5].
Research Studies
Pyrroloquinoline quinone and spatial working memory in naturally aged mice
In twenty-month-old naturally aged mice, PQQ supplementation was reported to improve spatial working memory and recognition memory without inducing anxiety-like behaviour, and was associated with better preservation of hippocampal neuronal integrity [4]. In HT-22 hippocampal neuronal cells, PQQ reduced ROS accumulation, restored mitochondrial membrane potential, and enhanced mitochondrial respiratory capacity [4]. Hippocampal transcriptomic analysis and upstream regulator prediction identified SIRT1 as a major regulator associated with these effects [4].
Ferulic acid eicosyl ester and cognitive flexibility in mice
Ferulic acid eicosyl ester (FAE-20), a natural constituent of Rhodiola rosea, had previously been identified as an enhancer of simple Pavlovian conditioning in flies, bees, and mice [3]. In the reported study, cognitive flexibility was assessed using the ASST, and subchronic FAE-20 treatment was investigated for effects on cognitive flexibility, working memory, and spatial learning in mice, alongside potential neurobiological mechanisms [3].
Glycodeoxycholic and deoxycholic bile acids and memory in adult mice
Male and female mice received daily oral administration of deoxycholic acid (DCA), glycodeoxycholic acid (GDCA), or vehicle, and spatial working and reference memory (Y-maze) and recognition memory (novel object recognition task) were assessed [5]. Administration of GDCA after 10 days disrupted recognition memory, and both bile acids were reported to impair recognition and spatial memory in adult mice and to reduce central CREB-BDNF signalling and cytokine expression with neuroanatomical specificity [5]. Gene expression and signalling activity were measured in the frontal cortex and hippocampus after testing [5].
Palmitoylethanolamide/luteolin and postoperative cognitive dysfunction in older adults
Postoperative cognitive dysfunction (POCD) is characterised by cognitive impairment, reduced functional independence, and decreased quality of life, and neuroinflammation is reported to play a relevant role in its development and persistence [7]. Palmitoylethanolamide (PEA) is an endogenous lipid mediator involved in the regulation of neuroinflammatory processes through modulation of non-neuronal cells, while luteolin is a flavonoid with antioxidant properties; under conditions of prolonged neuroinflammation, endogenous PEA levels may be insufficient to counteract pro-inflammatory signalling [7]. The registered trial evaluates PEA/luteolin supplementation in older adults undergoing cardiac surgery [7].
Nutritional formulation and working memory following stress exposure in middle-aged females
A double-blind repeated-measures crossover study is registered to evaluate a nutritional formulation, 'Think Tank', in middle-aged females (40–60 years) following exposure to a psychological and physical stressor [8]. Cognitive assessments examine working memory, sustained attention, cognitive flexibility, and inhibitory control, with comparison against placebo [8].
Sleep deprivation and cognitive performance in younger adults
A crossover study is registered to examine how total and partial sleep deprivation affect brain function, cognitive performance, and biomarkers related to stress and inflammation in the same participants, and to compare whether the two conditions affect the brain and body differently [2]. The stated aims include determining how total versus partial sleep deprivation affects brain activity during rest and cognitive tasks, and how sleep deprivation affects functional connectivity [2].
Mind-body group intervention and physiological outcomes in younger breast cancer survivors
A two-arm randomised controlled trial is registered to determine the feasibility of a larger trial in younger ER+ breast cancer survivors undergoing endocrine therapy in the Deep South, and to evaluate preliminary effectiveness of a breath-based group intervention, Breath-Body-Mind (BBM), a trauma-informed programme emphasising slow-paced coherent resonance breathing, on psychological and physiological outcomes [1]. The second arm, a survivorship education programme (SEP), serves as an attention-control matched for contact time and group setting [1].
Short-term performance assay for longevity interventions in mice
A short-term performance assay has been described to profile functional benefits and early toxicity of longevity interventions in mice over an 8-week period, with animals receiving one of five candidate anti-aging treatments: 17α-estradiol, rapamycin + Smer28, berberine + resveratrol, sildenafil, and pinealon [6]. The protocol longitudinally monitored body weight and temperature, and food intake, alongside performance measures [6].
Comparison of working-memory markers across models
| Marker | Model / population | Direction reported | Source |
|---|---|---|---|
| Spatial working memory (Y-maze) | Naturally aged mice | Improved with PQQ | [4] |
| Recognition memory (novel object recognition) | Naturally aged mice | Improved with PQQ | [4] |
| Spatial working and reference memory (Y-maze) | Adult mice | Impaired by DCA and GDCA | [5] |
| Recognition memory | Adult mice | Disrupted by GDCA after 10 days | [5] |
| Cognitive flexibility (ASST) | Mice | Assessed with subchronic FAE-20 | [3] |
| SIRT1 (predicted upstream regulator) | Mouse hippocampus; HT-22 cells | Associated with PQQ effects | [4] |
| CREB-BDNF signalling | Mouse frontal cortex and hippocampus | Reduced by DCA and GDCA | [5] |
| Mitochondrial respiratory capacity | HT-22 hippocampal neuronal cells | Enhanced by PQQ | [4] |
Reference-only sources support the broader context of cognitive marker measurement. Childhood trauma clusters have been examined alongside Klotho, matrix metalloproteinase-9 (MMP-9), and cognitive function in adolescents with major affective disorders [9]. Transcranial direct current stimulation has been investigated for mitigation of radiotherapy-induced cognitive impairment and modulation of cortical activity as measured by quantitative electroencephalography (QEEG) in patients undergoing whole-brain radiotherapy [10]. Dietary procyanidin C1 (PC1), a trimer of (-)-epicatechin units found in cocoa, grapes, and apples, has been examined for effects on neural function and a key regulatory microRNA [11]. A bifunctional peptide predicted to target neuropeptide Y4 and GLP-1 receptors has been reported to alleviate cognitive deficits in 5 × FAD mice by modulating cGAS-STING-mediated neuroinflammation [12].
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Sources
- [1] Mind-Body Group Interventions for Psychological Distress in Young Breast Cancer Survivors — https://clinicaltrials.gov/study/NCT07501637
- [2] The Neurocognitive Effects of Total and Partial Sleep Deprivation in Younger Adults — https://clinicaltrials.gov/study/NCT07822009
- [3] Ferulic acid eicosyl ester enhances cognitive flexibility and modulates arousal-related neural circuits in mice — https://pubmed.ncbi.nlm.nih.gov/42669349/
- [4] Pyrroloquinoline Quinone Improves Cognitive-Related Behavioral Performance Associated with Enhanced Mitochondrial Bioenergetics in Naturally Aged Mice — https://europepmc.org/article/PMC/PMC13509254
- [5] Glycodeoxycholic and deoxycholic bile acids impair recognition and spatial memory in adult mice, and reduce central CREB-BDNF signaling and cytokine expression with neuroanatomical specificity — https://europepmc.org/article/PMC/PMC13360544
- [6] Short-Term Performance Assay Identifies Functional Benefits and Early Toxicity of Longevity Interventions in Mice — https://doi.org/10.21203/rs.3.rs-9682683/v1
- [7] Palmitoylethanolamide/Luteolin Supplementation in Older Adults Undergoing Cardiac Surgery — https://clinicaltrials.gov/study/NCT07681063
- [8] Evaluation of the Impact of a Nutritional Formulation on Cognitive Performance Following Stress Exposure — https://clinicaltrials.gov/study/NCT07319117
- [9] Childhood Trauma Clusters, Klotho, Matrix Metalloproteinase-9, and Cognitive Function in Adolescents with Major Affective Disorders — https://pubmed.ncbi.nlm.nih.gov/42766483/
- [10] Transcranial direct current stimulation enhances cognitive performance and modulates QEEG beta- and theta-band power in patients undergoing whole-brain radiotherapy — https://europepmc.org/article/PMC/PMC13471286
- [11] Dietary Procyanidin C1 Improves Cognitive Function through MicroRNA-181a-5p — https://pubmed.ncbi.nlm.nih.gov/42142042/
- [12] A novel bifunctional peptide predicted to target neuropeptide Y4 and GLP-1 receptors alleviates cognitive deficits in 5 × FAD mice by modulating cGAS-STING-mediated neuroinflammation — https://pubmed.ncbi.nlm.nih.gov/42142765/