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Open research questions in Neuroscience and Neuropharmacology Research

53 unresolved questions extracted from the limitations and future-work sections of 410 Neuroscience and Neuropharmacology Research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Regional heterogeneity of astrocytes and neurons is increasingly recognised as a determinant of selective vulnerability in neurodegeneration, yet the molecular signatures underlying this specificity remain poorly defined.

    Glypican-5 delineates spatially distinct astrocyte and neuronal populations in the human hippocampus and is selectively remodelled in Alzheimer's disease · 2026 · DOI

  • Abstract Background and Purpose Serotonin (5-HT) is a key neuromodulator in the prefrontal cortex (PFC), yet its cell type-specific effects across excitatory and inhibitory microcircuits remain incompletely understood.

    Serotonin engages divergent 5‐HT receptor pathways for cell type‐resolved modulation of prefrontal layer 5 microcircuits · 2026 · DOI

  • While recent work has advanced our knowledge of active zone architecture in dopamine axons, release machinery within the synaptic vesicle (SV) remains poorly understood.

    Synaptic vesicles that store monoamines and glutamate differ in protein composition · 2026 · DOI

  • Despite extensive documentation of pathogenic thalamic remodeling, the cortical circuit abnormalities driving this highly stereotyped SWD remain elusive.

    Convergent Inhibitory Cortical Circuit Disruption Drives Genetically Distinct Absence Seizures · 2026 · DOI

  • How SPARCL1 acts at synapses, however, remains unclear because divergent results describe its binding partners at synapses and the sequences involved in its synaptogenic activity remain unclear.

    Teneurins Are SPARCL1 Receptors · 2026 · DOI

  • Although these kinds of experiments are beyond the scope of this work presented here, future research should examine the influence of cycle- stages on the NPS system in more detail. One limitation of the present work is the lack of electrophysiological in vivo data, which could provide direct evidence for a possible cycle-dependent transition of activity patterns of identified neurons.

    Electrophysiological characterization of neuropeptide S-expressing neurons in the periLC: influence of the female estrous cycle on neuronal excitability in mice · 2026 · DOI

  • While its precursor forms proBDNF regulates nerve development, neural transmission and cognitive function, it is not fully known whether the expression of proBDNF is changed in vivo or how it influences neuronal signaling and function ultimately leading to spatial cognitive impairments.

    Pentylenetetrazole kindling impairs place recognition memory associated with suppressing proBDNF-mediated neural information flows at the hippocampal CA3-CA1 synapses · 2026 · DOI

  • Thus, the pathophysiology of PD in part involves attenuated astrocyte Ca2+ signaling, placing these non-neuronal cells as a prime underexplored therapeutic target for PD.

    Striatal cholinergic and dopaminergic driven astrocyte Ca2+ activity is disrupted in Parkinsonian mice · 2026 · DOI

  • While diversity amongst CA3 pyramidal neurons (PNs) has been long reported, the principles organising cell type identity and their consequences for circuit function remain unclear.

    Hippocampal CA3 forms a two-layer network of molecularly distinct cell types in mice and humans · 2026 · DOI

  • (F) Hit rate (top), false alarm rate (middle), and d-prime (bottom) comparisons between the first and second day of training in the second stage of the task for animals with no manipulation (n = 18; stage two analyses limited to the first two days, the minimum duration across animals).

    Cortical astrocytes extend phasic norepinephrine signals and critically mediate learned behavior · 2026 · DOI

  • Although there is a growing understanding that hippocampal microcircuits, comprised of distinct CA1 principal cells (PCs), inhibitory neurons, and input/output relationships, route information through parallel hippocampal pathways, the relevance of this microscale organization in epilepsy is poorly understood.

    Hippocampal microcircuits constrain the generation of epileptiform activity · 2026 · DOI

  • SignificanceCaMKII is essential for synaptic plasticity and memory, yet the contribution of its non-catalytic functions, including liquid-liquid phase separation (LLPS), to brain function remains unclear.

    Disruption of CaMKII biomolecular condensation induces attention-deficit/hyperactivity disorder-like phenotypes · 2026 · DOI

  • Hypercapnic arousal is a life-preserving reflex that promotes awakening in response to elevated PCO2, yet the cellular mechanisms by which CO2 is detected remain incompletely understood.

    CO2-sensitive Cx26 hemichannels in dorsal raphe-ventral tegmental area pathway mediate hypercapnic arousal · 2026 · DOI

  • Together, these results indicate that ribosomal complexes exhibit subtype-specific protein composition in distinct subtypes of cortical projection neurons during development, and identify potential candidates for further investigation of function in translational regulation involved in subtype-specific circuit formation.

    Cortical projection neurons with distinct axonal connectivity employ ribosomal complexes with distinct protein compositions · 2026 · DOI

  • Translational control has been identified at multiple stages of PN development, but how translational regulation contributes to formation of distinct, subtype-specific long-range circuits is poorly understood.

    Cortical projection neurons with distinct axonal connectivity employ ribosomal complexes with distinct protein compositions · 2026 · DOI

  • Our observation that glutamatergic neuronal activation elicits brief head movements during both wakefulness and NREM sleep adds to this growing body of work and highlights a potential role for VTA glutamatergic neurons in movement control, warranting further investigation.

    Ventral tegmental area glutamatergic neurons suppress hippocampal ripples and induce head movements in mice · 2026 · DOI

  • Our study has several limitations. First, our movement analysis was restricted to the head, as tracking was based on an LED attached to the microdrive implant. We therefore cannot determine whether activation of the VTA glutamatergic neurons also elicited movements of other body parts. Moreover, because our overhead camera tracked a single LED, we could not ARTICLE IN PRESS ARTICLE IN PRESS ACCEPTED MANUSCRIPT resolve pitch, yaw, and roll components of head movement. Future studies using higher-resolution approaches, such as those used by Hughes et al. [32], will be necessary to characterize the detailed kinematics of VTA glutamatergic neuron-evoked movements. Second, given that we did not record muscle activations using electromyographic signals, we could not unambiguously distinguish between NREM and quiet-wake states, and it is likely that we pooled some of the quiet-wake periods together with NREM periods. However, in naturally sleeping mice, as is the case in our experiments, the proportion of time spent in quiet-wake state is only ~1-3% of the light phase [50, 51]. Therefore, the misclassification of quiet-wake state as NREM is likely minimal. Third, we detected ripples based on spectral power within the ripple frequency band without analyzing if sharp waves accompanied them. Therefore, the proportion of ripples with associated sharp waves remains unknown.

    Ventral tegmental area glutamatergic neurons suppress hippocampal ripples and induce head movements in mice · 2026 · DOI

  • Disrupted GABAergic signaling leads to maladaptive changes associated with neuropsychiatric disorders, yet the mechanisms that regulate GABAAR surface availability remain incompletely understood.

    JNK regulates β3-containing GABAAR expression at the cell surface via the receptor clustering protein GIT1 (ArfGAP1) · 2026 · DOI

  • Understanding the mechanisms governing AIS remodeling during development remains a fundamental question that is still not well understood.

    Deletion of the calcium-binding protein S100β alters axon initial segment development in the visual cortex · 2026 · DOI

  • One understudied auxiliary protein identified from transcriptomics, CNIH3, produces uniquely slow AMPA responses in heterologous expression.

    CNIH3 is a molecular signature of slow AMPA receptors · 2026 · DOI

  • Electroconvulsive therapy (ECT) is a highly effective treatment for several psychiatric disorders, though its biological mechanisms remain unclear.

    Electroconvulsive stimulation drives cortical spreading depression dependent immediate early gene expression in mice · 2026 · DOI

  • Water molecules exchange incessantly across cell membranes and between intracellular compartments, but the dominant steady-state transport pathways, and whether they are active or passive, remain unclear.

    Steady-state water exchange in neural tissue is primarily passive and through the phospholipid bilayer · 2026 · DOI

  • However, the mode of action of SPARCL1 at synapses remains unclear owing to divergent results in the literature.

    Teneurins Are SPARCL1 Receptors · 2026 · DOI

  • Behavioral and molecular alterations have been reported after exposure, but the cellular mechanisms underlying atrazine-induced developmental neurotoxicity remain unclear, particularly at the synaptic level.

    Developmental neurotoxicity of atrazine: decreased synaptic spine density and miRNA-driven GluN2A downregulation in primary hippocampal neurons · 2026 · DOI

  • To what extent the circuit and behavioral effects of striatal ACh and DA depend on astrocyte Ca2+ activity remains unclear.

    Striatal cholinergic and dopaminergic driven astrocyte Ca2+ activity is disrupted in Parkinsonian mice · 2026 · DOI

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53 open questions have been extracted from the limitations and future-work passages of 410 Neuroscience and Neuropharmacology Research papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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