Neuroscience

eLife Assessment

This study provides compelling evidence that action potential (AP) broadening is not a universal feature of homeostatic plasticity in response to chronic activity deprivation. By leveraging state-of-the-art methods across multiple brain regions and laboratories, the authors demonstrate that AP half-width remains largely stable, challenging previous assumptions in the field. These important findings help resolve longstanding inconsistencies in the literature and significantly advance our understanding of neuronal network homeostasis. The authors have clarified methodological differences with prior work and expanded the discussion of potential mechanisms, strengthening the interpretation of the findings without altering the central conclusions.

eLife Assessment

This study presents an important finding regarding how partner preference formation and pair bonding behavior are related to the oxytocin receptor gene expression in the NAc and paraventricular nucleus of the hypothalamus in prairie voles. The evidence supporting this claim is solid but could benefit from increased sample size and more thorough behavioral phenotyping. This study will be of interest to social scientists and neuroscientists who work on pair bonding and oxytocin.

eLife Assessment

This study presents a useful array of analyses of the effects of training and/or instruction to use the method of loci during episodic encoding and retrieval. A major strength of the experiment is the impressive recruitment of memory athletes and the training of novice athletes to use the method of loci, long known to improve the precision of memory recall. That said, the sheer number of results and their organization should be addressed; streamlining the results and placing them, whenever possible, in a theoretical framework. As it stands, the presented work is incomplete with respect to the major conclusions that training itself leads to neural differentiation of prefrontal cortical neural patterns, and the authors need to temper these claims.

eLife Assessment

This work provides a map of enhancer-promoter interactions associated with genes controlling the development of a specific neuronal cell population. The study offers a valuable resource and integrates multiple complementary datasets to provide insights into regulatory mechanisms, although the conceptual advances are moderate and the central message could be clearer. The evidence supporting the conclusions is generally solid, but the lack of direct functional testing of key regulatory elements limits the strength of some claims.

[Editors' note: this paper was reviewed by Review Commons.]

eLife Assessment

This is a useful study that seeks to elucidate the molecular mechanisms underlying spinal motor circuit assembly. The authors demonstrate that loss of Onecut transcription factors in spinal motor neurons affects the size and spatial distribution of pre-motor interneurons. However, the study in its current form is incomplete: the data and analyses do not fully support the main conclusion that Onecut acts through Neurotrophin-3 to regulate interneuron development in a non-cell autonomous manner. The work will be of broad interest to cell and developmental biologists.

eLife Assessment

This important study examines how chronic pain and opioid exposure interact at the cellular and molecular levels in a reward-related brain region. Using single-nucleus RNA sequencing, the authors map transcriptional changes in the rat ventral tegmental area following chronic inflammatory pain and acute morphine exposure. Notably, their convincing data support that acute morphine, not chronic pain, elicits a stress-related transcriptional response primarily in glial cells rather than neurons, challenging prevailing views of opioid action and supporting growing evidence for glucocorticoid signaling in glial responses. A limitation is the use of a single opioid dose and time point, and further discussion of these constraints would help clarify the broader implications of the findings.