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Brain Sci., Volume 15, Issue 8 (August 2025) – 3 articles

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20 pages, 2436 KiB  
Review
An Update and Perspectives on Mitochondrial Membrane Protein-Associated Neurodegeneration and C19orf12 Research
by Barbara Gnutti, Arcangela Iuso, Chloé Angelini and Dario Finazzi
Brain Sci. 2025, 15(8), 777; https://doi.org/10.3390/brainsci15080777 (registering DOI) - 22 Jul 2025
Abstract
Mitochondrial Membrane Protein-Associated Neurodegeneration is a rare monogenic form of neurodegeneration characterized by iron accumulation in the brain. It is due to variants in the orphan gene C19orf12. Since its definition in 2011, many scientific groups have investigated the clinical features and [...] Read more.
Mitochondrial Membrane Protein-Associated Neurodegeneration is a rare monogenic form of neurodegeneration characterized by iron accumulation in the brain. It is due to variants in the orphan gene C19orf12. Since its definition in 2011, many scientific groups have investigated the clinical features and molecular underpinnings of the disorder. In this review, we summarize the main points of progress in this field, trying to highlight the issues that need further attention and efforts to speed up the diagnostic path, improve the existing treatment options, and define targeted therapies. Full article
(This article belongs to the Section Neurodegenerative Diseases)
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24 pages, 1438 KiB  
Article
Neonatal Handling Positively Modulates Anxiety, Sensorimotor Gating, Working Memory, and Cortico-Hippocampal Neuroplastic Adaptations in Two Genetically Selected Rat Strains Differing in Emotional and Cognitive Traits
by Cristóbal Río-Álamos, Maria P. Serra, Francesco Sanna, Maria A. Piludu, Marianna Boi, Toni Cañete, Daniel Sampedro-Viana, Ignasi Oliveras, Adolf Tobeña, Maria G. Corda, Osvaldo Giorgi, Alberto Fernández-Teruel and Marina Quartu
Brain Sci. 2025, 15(8), 776; https://doi.org/10.3390/brainsci15080776 (registering DOI) - 22 Jul 2025
Abstract
Background/Objectives: The bidirectional selection of the Roman low- (RLA) and Roman high-avoidance (RHA) rat strains for extremely slow vs. very rapid acquisition of the two-way (shuttle-box) avoidance response has generated two divergent phenotypic profiles: RHA rats exhibit a behavioural pattern and gene [...] Read more.
Background/Objectives: The bidirectional selection of the Roman low- (RLA) and Roman high-avoidance (RHA) rat strains for extremely slow vs. very rapid acquisition of the two-way (shuttle-box) avoidance response has generated two divergent phenotypic profiles: RHA rats exhibit a behavioural pattern and gene expression profile in the frontal cortex and hippocampus (HPC) that are relevant to social and attentional/cognitive schizophrenia-linked symptoms; on the other hand, RLA rats display phenotypic traits linked to increased anxiety and sensitivity to stress-induced depression-like behaviours. The present studies aimed to evaluate the enduring and potentially positive effects of neonatal handling-stimulation (NH) on the traits differentiating these two strains of rats. Methods: We evaluated the effects of NH on anxious behaviour, prepulse inhibition of startle (PPI), spatial working memory, and hormone responses to stress in adult rats of both strains. Furthermore, given the proposed involvement of neuronal/synaptic plasticity and neurotrophic factors in the development of anxiety, stress, depression, and schizophrenia-related symptoms, using Western blot (WB) we assessed the effects of NH on the content of brain-derived neurotrophic factor (BDNF), its trkB receptor and Polysialilated-Neural Cell Adhesion Molecule (PSA-NCAM), in the prefrontal cortex (PFC), anterior cingulate cortex (ACg), ventral (vHPC), and dorsal (dHPC) hippocampus of adult rats from both strains. Results: NH increased novelty-induced exploration and reduced anxiety, particularly in RLA rats, attenuated the stress-induced increment in corticosterone and prolactin plasma levels, and improved PPI and spatial working memory in RHA rats. These effects correlated to long-lasting increases of BDNF and PSA-NCAM content in PFC, ACg, and vHPC. Conclusions: Collectively, these findings show enduring and distinct NH effects on neuroendocrine and behavioural and cognitive processes in both rat strains, which may be linked to neuroplastic and synaptic changes in the frontal cortex and/or hippocampus. Full article
(This article belongs to the Section Behavioral Neuroscience)
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16 pages, 1167 KiB  
Review
The Olfactory Bulbectomy Model of Depression: Brief History, Current Status and Critique
by David Coppola
Brain Sci. 2025, 15(8), 775; https://doi.org/10.3390/brainsci15080775 (registering DOI) - 22 Jul 2025
Abstract
In the last several decades, a number of animal models of neurological diseases have been proposed and validated to one degree or another. This review focuses on the olfactory bulbectomized rodent as a model of major depression, a disorder that, because of its [...] Read more.
In the last several decades, a number of animal models of neurological diseases have been proposed and validated to one degree or another. This review focuses on the olfactory bulbectomized rodent as a model of major depression, a disorder that, because of its prevalence, has been called the “common cold” of neurological diseases, though the disability it causes is far more profound. After describing the method, a brief history of this model and the various validity claims made for it are discussed. Though a legion of physiological and biochemical sequelae of bulbectomy and other animal models of depression have been reported, the focus of this review is behavioral. Therefore, the neurochemical and molecular aspects of the depression models mentioned in this review will not be explored in depth. Lastly, unresolved questions posed by the bulbectomy model are considered along with its utility in the study of other neurological diseases and its future prospects. Full article
(This article belongs to the Special Issue The Olfactory System in Health and Disease)
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