{"title":"Plasticity of brain sexual dimorphism as revealed by sex changing fish","authors":"Gabriel J. Graham, Justin S. Rhodes","doi":"10.1016/j.conb.2025.103094","DOIUrl":"10.1016/j.conb.2025.103094","url":null,"abstract":"<div><div>Sex determination in coral reef fish is highly plastic, with many species displaying socially controlled sequential hermaphroditism. In these species, social hierarchy cues trigger sex change, initiating transformations in neuroanatomy, physiology, morphology, and behavior. The process begins in the brain, where shifts in dominance status alter cortisol release and neuromodulator signaling, including dopamine and arginine vasotocin. Radial glia detect these changes and modulate local estradiol synthesis via brain aromatase production that in turn influences neurogenesis and gene expression in multiple types of glia and neurons involved in pituitary-gonadotroph regulation. The altered gonadotroph control directs the gonadal transformation. Mechanistically, protogyny (female-to-male) typically occurs faster than protandry (male-to-female), with differences in the order of behavioral, gonadal, and morphological changes. Understanding these processes in sex-changing fish provides valuable insights into the neural and endocrine mechanisms underlying reproductive plasticity, with broader implications for neuroendocrinology and the evolution of sex differences in vertebrates.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103094"},"PeriodicalIF":5.2,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Astroglial regulation of critical period plasticity in the developing brain","authors":"Jérôme Ribot , Rachel Breton , Glenn Dallérac , Nathalie Rouach","doi":"10.1016/j.conb.2025.103092","DOIUrl":"10.1016/j.conb.2025.103092","url":null,"abstract":"<div><div>Astrocytes emerge as pivotal regulators of brain plasticity during critical periods (CPs) of development. Beyond their traditional roles in supporting neuronal function, astrocytes actively shape synaptic circuits maturation and remodeling during postnatal experience-dependent plasticity. Through mechanisms such as regulation of the extracellular matrix or synaptic pruning, astrocytes influence the timing and extent of plasticity across sensory and cognitive systems. These processes have been demonstrated in various animal models and forms of plasticity, indicating that these glial cells play a conserved role across species. Such findings unveil the dynamic and central role of astrocytes in coordinating the complex interplay between neural circuits and external stimuli during critical windows of brain development.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103092"},"PeriodicalIF":5.2,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144827805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Increased heavy-tailed distribution of synaptic weights distorts neurocomputation in schizophrenia","authors":"Akiko Hayashi-Takagi","doi":"10.1016/j.conb.2025.103089","DOIUrl":"10.1016/j.conb.2025.103089","url":null,"abstract":"<div><div>Several lines of evidence strongly implicate synaptic dysfunction in schizophrenia (SZ), but a direct causal link between synaptic pathology and behavioral manifestations remains elusive. Spine size, a proxy for synaptic strength, has a highly skewed distribution with a long-tail that is particularly exacerbated in SZ. Such data skewness is a fairly common phenomenon in many areas of science, and components in the heavy long-tail distribution are highly influential in maintaining network connectivity. I emphasize the critical importance of accurately assessing the distribution of skewness of synaptic weights within individual neurons and its impact on the neural computation and flow of information across neural circuits, leading to a critical step in understanding the synaptopathology underlying SZ.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103089"},"PeriodicalIF":5.2,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carolina Piletti Chatain , Zachary H. Gursky , Daniel F. Camacho , Emilia Favuzzi
{"title":"Immunity meets inhibition: Immunomodulation of cortical inhibitory synaptic networks","authors":"Carolina Piletti Chatain , Zachary H. Gursky , Daniel F. Camacho , Emilia Favuzzi","doi":"10.1016/j.conb.2025.103090","DOIUrl":"10.1016/j.conb.2025.103090","url":null,"abstract":"<div><div>Interactions between the nervous and immune systems are increasingly recognized as pivotal in normal physiology, brain function, and behavior. This review explores an emerging frontier in neurobiology focusing on the regulation of cortical inhibitory synapses and circuits by immune mediators and effectors, with a particular emphasis on microglia and meningeal immune cells. Microglia, the primary immune cells in the brain parenchyma, regulate inhibitory synapse development and function. Recent evidence revealed the crucial role of gamma-aminobutyric acid (GABA) signaling in mobilizing microglia and modulating their interactions with inhibitory neurons. These include physical shielding, remodeling or stripping of inhibitory synapses, and releasing soluble factors. Meningeal immune cells, comprising innate and adaptive populations, also influence cortical inhibition under physiological conditions via secretion of cytokines such as interferon-gamma and interleukins. This review highlights the mechanisms through which immune cells modulate cortical inhibition, and more broadly, the role of neuroimmune interactions in normal brain development and function.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103090"},"PeriodicalIF":5.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ziad M. Hafed , Aristides Arrenberg , Cornelius Schwarz , Jan Benda , Jan Grewe
{"title":"Statistical regularities and the sensory consequences of self-action: A multi-species, multi-modal perspective","authors":"Ziad M. Hafed , Aristides Arrenberg , Cornelius Schwarz , Jan Benda , Jan Grewe","doi":"10.1016/j.conb.2025.103087","DOIUrl":"10.1016/j.conb.2025.103087","url":null,"abstract":"<div><div>Active sensing is integral for survival in many organisms. While statistical regularities in natural scenes, as well as ecological relevance, are particularly relevant for shaping motor behaviors, significantly less is known about how these factors additionally influence the brain's compensatory mechanisms for the sensory consequences of self-action. Here, using different sensory modalities, species, and timescales, we review recent developments demonstrating that both state estimation and sensory gating, fundamental functions related to sensory processing during movement, are malleable and reflect statistical regularities. Such regularities exist in both the natural environment as well as in the sensory-motor contingencies specific to a given action type. In some species and modalities, the mechanisms for state estimation are well characterized, whereas in others, sensory gating is more developed. We provide a comparative approach that not only identifies common underlying principles, but also highlights upcoming research questions that are relevant for each sensory modality and species.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103087"},"PeriodicalIF":4.8,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A neurobiology perspective on the assembly of retinal vasculature from 2D to 3D","authors":"Mahima Bose , Mengya Zhao , Kenichi Toma , Xin Ye , Xin Duan","doi":"10.1016/j.conb.2025.103085","DOIUrl":"10.1016/j.conb.2025.103085","url":null,"abstract":"<div><div>The reciprocal regulation of the neural ensemble and vascular network within the mammalian central nervous system (CNS) is crucial for its development and functionality. Neuron-derived pro-angiogenic factors, such as growth factors, morphogens, and guidance cues, play a key role in forming stereotypical vascular architectures in the cortex, spinal cord, and cerebellum during development. Notably, the CNS vasculature forms distinct 3D lattice structures composed of laminar vascular networks interconnected by penetrating vessels. This contrasts with the more random 3D arborizations found in tumors. While the morphogen gradients for vascular network growth have been well-studied, the mechanisms contributing to vascular patterning and lattice maintenance in 3D are not fully understood. The mammalian retina provides an ideal model for studying these mechanisms, given its laminar organization of neurons and plexus organization of vessels, allowing for the investigation of 2D growth to 3D lattice establishment in a stepwise manner. Notably, recent studies have highlighted the roles of neurons and glia in retinal vascular patterning in 2D, as well as the involvement of neurotransmitters in regulating vascular growth. Additionally, direct neuron-to-vessel interactions have been found to contribute to 3D retinal vascular lattice formation. As emerging technologies provide new insights into retinal vascular assembly in 3D, understanding the developmental regulation and the physiological and pathophysiological effects of 3D lattice disruption remains a fertile field of research.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"93 ","pages":"Article 103085"},"PeriodicalIF":4.8,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Learning, prediction accuracy, and neural plasticity in sensory cortex","authors":"Alison L. Barth, Joseph A. Christian, Ajit Ray","doi":"10.1016/j.conb.2025.103088","DOIUrl":"10.1016/j.conb.2025.103088","url":null,"abstract":"<div><div>Causal inference during association learning is a cardinal feature of complex nervous systems. In reinforcement learning, a stimulus or context becomes linked to a negative or positive outcome to inform future behavior. Although prefrontal cortex and striatal circuits have been implicated in reinforcement learning, sensory cortex also undergoes marked short-term and long-lasting changes. Here we review studies demonstrating anatomical, synaptic, and task-dependent response plasticity in sensory cortex during learning. A contrast between plasticity induced by sensory association learning, where stimuli predict reinforcement outcomes, and pseudotraining, where sensory inputs are uncoupled, is consistent with sensory cortex's role in prediction evaluation and reinforcement signaling. We propose that plasticity in sensory cortex–a site for collision of internally-generated expectations and incoming sensory input–reflects the relative accuracy of expected versus actual sensory signals as they develop during learning. Sensory learning may thus be a useful tool to probe the function of neocortical circuits.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"93 ","pages":"Article 103088"},"PeriodicalIF":4.8,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cracking the cadherin codes that wire the nervous system","authors":"Madison T. Gray , Julie L. Lefebvre","doi":"10.1016/j.conb.2025.103086","DOIUrl":"10.1016/j.conb.2025.103086","url":null,"abstract":"<div><div>Synaptic partner recognition and precise connectivity are essential components of neural circuit formation and function. Cell adhesion molecules with selective binding properties provide instructive cues for synapse specificity. Yet, we know little about how they guide the stereotyped organization of neural circuits. Advances in transcriptomics, genetic manipulations, neural tracing and imaging in intact nervous systems enable new avenues to identify mechanisms by which adhesion molecules regulate synapse specificity. Here we discuss the Cadherin superfamily, which forms one of the most functionally versatile families of cell adhesion molecules. Focusing on the classical cadherins and clustered protocadherins, we discuss recent findings that demonstrate roles in regulating synaptic partnerships and signaling properties, and optimizing neurite wiring. We highlight studies that demonstrate instructive roles through genetic manipulations with assays of synaptic connectivity. Understanding how neurons leverage a Cadherin code for specifying neural connectivity provides insights into the broader principles of circuit assembly and function.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"93 ","pages":"Article 103086"},"PeriodicalIF":4.8,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144570878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Charles Verdonk , Olujimi A. Ajijola , Sahib S. Khalsa
{"title":"Toward a multidisciplinary neurobiology of interoception and mental health","authors":"Charles Verdonk , Olujimi A. Ajijola , Sahib S. Khalsa","doi":"10.1016/j.conb.2025.103084","DOIUrl":"10.1016/j.conb.2025.103084","url":null,"abstract":"<div><div>Interoception, the process by which the nervous system senses, interprets and integrates internal physiological signals, is fundamental to health, playing a key role in brain-body feedback loops that maintain homeostasis. Disruptions in interoceptive processing are common across psychiatric disorders, highlighting its relevance for diagnosis, prognosis, and treatment. This review examines recent translational advances in interoception research, with a focus on anxiety disorders, depression, eating disorders, and functional gastrointestinal disorders, where altered interoceptive signaling contributes to core symptoms. We discuss emerging cellular and molecular insights from animal models and address barriers to translating these findings to human psychopathology. To bridge this gap, we propose a “roving lens” approach, a multidisciplinary framework that dynamically integrates findings across biological scales, species, and methods. Here, multidisciplinary denotes team-based collaboration in which multiple fields contribute complementary expertise to a shared question, without fully dissolving disciplinary boundaries. By uniting mechanistic animal research with human clinical insight, this approach can advance interoceptive neuroscience and inform novel therapeutic strategies for psychiatric disorders.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"94 ","pages":"Article 103084"},"PeriodicalIF":4.8,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sexual dimorphism in the behaviour and sensory systems of mosquitoes","authors":"Prashali Bansal, Sonia Q. Sen","doi":"10.1016/j.conb.2025.103070","DOIUrl":"10.1016/j.conb.2025.103070","url":null,"abstract":"<div><div>In the animal kingdom, sexual dimorphism often creates marked differences between males and females. These can be so pronounced that individuals of the same species may even appear unrelated. Such dimorphism also extends to behaviours. Males often perform elaborate courtship rituals to attract females, while females usually invest in offspring care. Among insects too, sexual dimorphism in form and behaviour is readily observed. Here, we discuss sexual dimorphism in mosquitoes, whose males and females exhibit distinct anatomical, physiological, and behavioural differences. We focus on two behaviours: female-specific blood-feeding and male-specific courtship and mating. These behaviours rely on distinct sensory modalities resulting in sexual dimorphism within their sensory organs, neural circuits, and molecular genetics. We explore these differences in the context of olfaction, gustation, and audition in mosquitoes.</div></div>","PeriodicalId":10999,"journal":{"name":"Current Opinion in Neurobiology","volume":"93 ","pages":"Article 103070"},"PeriodicalIF":4.8,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}