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Ruolan Hu, Juan Xu, Yimin Hua, Yifei Li, Jinrong Li
BACKGROUND: Docosahexaenoic acid (DHA) plays a crucial role in the growth and functional development of the infant brain. However, the impact of additional DHA supplementation on neurodevelopment in infants remains controversial in randomized controlled trials. In this systematic review and meta-analysis, we aimed to investigate the effects of prenatal and postnatal DHA supplementation on neurodevelopment. METHODS: We systematically searched the MEDLINE, EMBASE, and Cochrane Library electronic databases using a predefined strategy until 8 February 2024...
2024: Frontiers in Neurology
#22
JOURNAL ARTICLE
Nicolás Cano-Astorga, Sergio Plaza-Alonso, Marta Turegano-Lopez, José Rodrigo-Rodríguez, Angel Merchan-Perez, Javier DeFelipe
The brain contains thousands of millions of synapses, exhibiting diverse structural, molecular, and functional characteristics. However, synapses can be classified into two primary morphological types: Gray's type I and type II, corresponding to Colonnier's asymmetric (AS) and symmetric (SS) synapses, respectively. AS and SS have a thick and thin postsynaptic density, respectively. In the cerebral cortex, since most AS are excitatory (glutamatergic), and SS are inhibitory (GABAergic), determining the distribution, size, density, and proportion of the two major cortical types of synapses is critical, not only to better understand synaptic organization in terms of connectivity, but also from a functional perspective...
2024: Frontiers in Neuroanatomy
#23
JOURNAL ARTICLE
Eghbal A Hosseini, Martin Schrimpf, Yian Zhang, Samuel Bowman, Noga Zaslavsky, Evelina Fedorenko
Artificial neural networks have emerged as computationally plausible models of human language processing. A major criticism of these models is that the amount of training data they receive far exceeds that of humans during language learning. Here, we use two complementary approaches to ask how the models' ability to capture human fMRI responses to sentences is affected by the amount of training data. First, we evaluate GPT-2 models trained on 1 million, 10 million, 100 million, or 1 billion words against an fMRI benchmark...
2024: Neurobiology of language
#24
JOURNAL ARTICLE
Carina Kauf, Greta Tuckute, Roger Levy, Jacob Andreas, Evelina Fedorenko
Representations from artificial neural network (ANN) language models have been shown to predict human brain activity in the language network. To understand what aspects of linguistic stimuli contribute to ANN-to-brain similarity, we used an fMRI data set of responses to n = 627 naturalistic English sentences (Pereira et al., 2018) and systematically manipulated the stimuli for which ANN representations were extracted. In particular, we (i) perturbed sentences' word order, (ii) removed different subsets of words, or (iii) replaced sentences with other sentences of varying semantic similarity...
2024: Neurobiology of language
#25
JOURNAL ARTICLE
Hoda Amani Hamedani, Thomas Stegall, Yi Yang, Haochen Wang, Ashwin Menon, Anubhuti Bhalotia, Efstathios Karathanasis, Jeffrey R Capadona, Allison Hess-Dunning
ABSTRACT: The current work presents a novel flexible multifunctional platform for biological interface applications. The use of titania nanotube arrays (TNAs) as a multifunctional material is explored for soft-tissue interface applications. In vitro biocompatibility of TNAs to brain-derived cells was first examined by culturing microglia cells-the resident immune cells of the central nervous system on the surface of TNAs. The release profile of an anti-inflammatory drug, dexamethasone from TNAs-on-polyimide substrates, was then evaluated under different bending modes...
2024: MRS Bulletin
#26
Mahya Sanati, Sabereh Bayat, Mehrdad Mohammad Panahi, Amirhossein Khodadadi, Sahar Rezaee, Mahdieh Ghasimi, Sara Besharat, Zahra Mahboubi Fooladi, Mostafa Almasi Dooghaee, Morteza Sanei Taheri, Bradford C Dickerson, Adele Goldberg, Neguine Rezaii
This study challenges the conventional psycholinguistic view that the distinction between nouns and verbs is pivotal in understanding language impairments in neurological disorders. Traditional views link frontal brain region damage with verb processing deficits and posterior temporoparietal damage with noun difficulties. However, this perspective is contested by findings from patients with Alzheimer's disease (pwAD), who show impairments in both word classes despite their typical temporoparietal atrophy. Notably, pwAD tend to use semantically lighter verbs in their speech than healthy individuals...
April 10, 2024: medRxiv
#27
Jennifer H Lawrence, Asha Patel, Melvin W King, Collin J Nadarajah, Richard Daneman, Erik S Musiek
The blood-brain barrier (BBB) is critical for maintaining brain homeostasis but is susceptible to inflammatory dysfunction. Permeability of the BBB to lipophilic molecules shows circadian variation due to rhythmic transporter expression, while basal permeability to polar molecules is non-rhythmic. Whether daily timing influences BBB permeability in response to inflammation is unknown. Here, we induced systemic inflammation through repeated lipopolysaccharide (LPS) injections either in the morning (ZT1) or evening (ZT13) under standard lighting conditions, then examined BBB permeability to a polar molecule, sodium fluorescein...
April 14, 2024: bioRxiv
#28
Zicong Zhou, Kylie Jones, Elena I Ivleva, Luis Colon-Perez
INTRODUCTION: Early psychosis (EP) is a critical period in the course of psychotic disorders during which the brain is thought to undergo rapid and significant functional and structural changes 1 . Growing evidence suggests that the advent of psychotic disorders is early alterations in the brain's functional connectivity and structure, leading to aberrant neural network organization. The Human Connectome Project (HCP) is a global effort to map the human brain's connectivity in healthy and disease populations; within HCP, there is a specific dataset that focuses on the EP subjects (i...
April 14, 2024: bioRxiv
#29
Caroline Filan, Seleipiri Charles, Paloma Casteleiro Costa, Weibo Niu, Brian F Cheng, Zhexing Wen, Hang Lu, Francisco E Robles
Brain organoids provide a unique opportunity to model organ development in a system similar to human organogenesis in vivo. Brain organoids thus hold great promise for drug screening and disease modeling. Conventional approaches to organoid characterization predominantly rely on molecular analysis methods, which are expensive, time-consuming, labor-intensive, and involve the destruction of the valuable 3D architecture of the organoids. This reliance on end-point assays makes it challenging to assess cellular and subcellular events occurring during organoid development in their 3D context...
April 1, 2024: Research Square
#30
Yunji Park, Yuan Zhang, Flora Schwartz, Teresa Iuculano, Hyesang Chang, Vinod Menon
UNLABELLED: Number sense is essential for early mathematical development but it is compromised in children with mathematical disabilities (MD). Here we investigate the impact of a personalized 4-week Integrated Number Sense (INS) tutoring program aimed at improving the connection between nonsymbolic (sets of objects) and symbolic (Arabic numerals) representations in children with MD. Utilizing neural pattern analysis, we found that INS tutoring not only improved cross-format mapping but also significantly boosted arithmetic fluency in children with MD...
April 12, 2024: bioRxiv
#31
S G Choi, T Tittle, D Garcia-Prada, J H Kordower, R Melki, B A Killinger
UNLABELLED: Alpha-synuclein (αsyn) is an intrinsically disordered protein that aggregates in the brain in several neurodegenerative diseases collectively called synucleinopathies. Phosphorylation of αsyn at serine 129 (PSER129) was considered rare in the healthy human brain but is enriched in pathological αsyn aggregates and is used as a specific marker for disease inclusions. However, recent observations challenge this assumption by demonstrating that PSER129 results from neuronal activity and can be readily detected in the non-diseased mammalian brain...
April 9, 2024: bioRxiv
#32
Angela M O'Connor, Megan H Hagenauer, Liam Cannon Thew Forrester, Pamela M Maras, Keiko Arakawa, Elaine K Hebda-Bauer, Huzefa Khalil, Evelyn R Richardson, Farizah I Rob, Yusra Sannah, Stanley J Watson, Huda Akil
Stress is a major influence on mental health status; the ways that individuals respond to or copes with stressors determine whether they are negatively affected in the future. Stress responses are established by an interplay between genetics, environment, and life experiences. Psychosocial stress is particularly impactful during adolescence, a critical period for the development of mood disorders. In this study we compared two established, selectively-bred Sprague Dawley rat lines, the "internalizing" bred Low Responder (bLR) line versus the "externalizing" bred High Responder (bHR) line, to investigate how genetic temperament and adolescent environment impact future responses to social interactions and psychosocial stress, and how these determinants of stress response interact...
April 11, 2024: bioRxiv
#33
Jing Liu, Federica Mosti, Hanzhi T Zhao, Jesus E Sotelo-Fonseca, Carla F Escobar-Tomlienovich, Davoneshia Lollis, Camila M Musso, Yiwei Mao, Abdull J Massri, Hannah M Doll, Andre M Sousa, Gregory A Wray, Ewoud Schmidt, Debra L Silver
Humans evolved an extraordinarily expanded and complex cerebral cortex, associated with developmental and gene regulatory modifications 1-3 . Human accelerated regions (HARs) are highly conserved genomic sequences with human-specific nucleotide substitutions. Although there are thousands of annotated HARs, their functional contribution to human-specific cortical development is largely unknown 4,5 . HARE5 is a HAR transcriptional enhancer of the WNT signaling receptor Frizzled8 (FZD8) active during brain development 6 ...
April 11, 2024: bioRxiv
#34
Yuyang Chen, Ruebena Dawes, Hyung Chul Kim, Sarah L Stenton, Susan Walker, Alicia Ljungdahl, Jenny Lord, Vijay S Ganesh, Jialan Ma, Alexandra C Martin-Geary, Gabrielle Lemire, Elston N D'Souza, Shan Dong, Jamie M Ellingford, David R Adams, Kirsten Allan, Madhura Bakshi, Erin E Baldwin, Seth I Berger, Jonathan A Bernstein, Natasha J Brown, Lindsay C Burrage, Kimberly Chapman, Alison G Compton, Chloe A Cunningham, Precilla D'Souza, Emmanuèle C Délot, Kerith-Rae Dias, Ellen R Elias, Carey-Anne Evans, Lisa Ewans, Kimberly Ezell, Jamie L Fraser, Lyndon Gallacher, Casie A Genetti, Christina L Grant, Tobias Haack, Alma Kuechler, Seema R Lalani, Elsa Leitão, Anna Le Fevre, Richard J Leventer, Jan E Liebelt, Paul J Lockhart, Alan S Ma, Ellen F Macnamara, Taylor M Maurer, Hector R Mendez, Stephen B Montgomery, Marie-Cécile Nassogne, Serena Neumann, Melanie O'Leary, Elizabeth E Palmer, John Phillips, Georgia Pitsava, Ryan Pysar, Heidi L Rehm, Chloe M Reuter, Nicole Revencu, Angelika Riess, Rocio Rius, Lance Rodan, Tony Roscioli, Jill A Rosenfeld, Rani Sachdev, Cas Simons, Sanjay M Sisodiya, Penny Snell, Laura St Clair, Zornitza Stark, Tiong Yang Tan, Natalie B Tan, Suzanna El Temple, David R Thorburn, Cynthia J Tifft, Eloise Uebergang, Grace E VanNoy, Eric Vilain, David H Viskochil, Laura Wedd, Matthew T Wheeler, Susan M White, Monica Wojcik, Lynne A Wolfe, Zoe Wolfenson, Changrui Xiao, David Zocche, John L Rubenstein, Eirene Markenscoff-Papadimitriou, Sebastian M Fica, Diana Baralle, Christel Depienne, Daniel G MacArthur, Joanna Mm Howson, Stephan J Sanders, Anne O'Donnell-Luria, Nicola Whiffin
Around 60% of individuals with neurodevelopmental disorders (NDD) remain undiagnosed after comprehensive genetic testing, primarily of protein-coding genes 1 . Increasingly, large genome-sequenced cohorts are improving our ability to discover new diagnoses in the non-coding genome. Here, we identify the non-coding RNA RNU4-2 as a novel syndromic NDD gene. RNU4-2 encodes the U4 small nuclear RNA (snRNA), which is a critical component of the U4/U6.U5 tri-snRNP complex of the major spliceosome 2 . We identify an 18 bp region of RNU4-2 mapping to two structural elements in the U4/U6 snRNA duplex (the T-loop and Stem III) that is severely depleted of variation in the general population, but in which we identify heterozygous variants in 119 individuals with NDD...
April 9, 2024: medRxiv
#35
Kathryn Rogers, Joshua I Gold, Long Ding
The subthalamic nucleus (STN) plays critical roles in the motor and cognitive function of the basal ganglia (BG), but the exact nature of these roles is not fully understood, especially in the context of decision-making based on uncertain evidence. Guided by theoretical predictions of specific STN contributions, we used single-unit recording and electrical microstimulation in the STN of healthy monkeys to assess its causal, computational roles in visual-saccadic decisions based on noisy evidence. The recordings identified subpopulations of STN neurons with distinct task-related activity patterns that related to different theoretically predicted functions...
April 13, 2024: bioRxiv
#36
More widespread and rigid neuronal representation of reward expectation underlies impulsive choices.
Rhiannon L Cowan, Tyler Davis, Bornali Kundu, Shervin Rahimpour, John D Rolston, Elliot H Smith
Impulsive choices prioritize smaller, more immediate rewards over larger, delayed, or potentially uncertain rewards. Impulsive choices are a critical aspect of substance use disorders and maladaptive decision-making across the lifespan. Here, we sought to understand the neuronal underpinnings of expected reward and risk estimation on a trial-by-trial basis during impulsive choices. To do so, we acquired electrical recordings from the human brain while participants carried out a risky decision-making task designed to measure choice impulsivity...
April 12, 2024: bioRxiv
#37
Alkis M Hadjiosif, Tricia L Gibo, Maurice A Smith
UNLABELLED: The cerebellum is critical for sensorimotor learning. The specific contribution that it makes, however, remains unclear. Inspired by the classic finding that, for declarative memories, medial temporal lobe structures provide a gateway to the formation of long-term memory but are not required for short-term memory, we hypothesized that, for sensorimotor memories, the cerebellum may play an analogous role. Here we studied the sensorimotor learning of individuals with severe ataxia from cerebellar degeneration...
April 12, 2024: bioRxiv
#38
JOURNAL ARTICLE
Mohsina Patwekar, Faheem Patwekar, Shahzad Khan, Rohit Sharma, Dileep Kumar
A variety of cutting-edge methods and good knowledge of the illness's complex causes are causing a sea change in the field of Alzheimer's Disease (A.D.) research and treatment. Precision medicine is at the vanguard of this change, where individualized treatment plans based on genetic and biomarker profiles give a ray of hope for customized therapeutics. Combination therapies are becoming increasingly popular as a way to address the multifaceted pathology of Alzheimer's by simultaneously attacking Aβ plaques, tau tangles, neuroinflammation, and other factors...
April 19, 2024: Current Topics in Medicinal Chemistry
#39
REVIEW
Lisa M Christian, Janice K Kiecolt-Glaser, Steve W Cole, Christin E Burd, Annelise A Madison, Stephanie J Wilson, Ashley E Rosko
Multiple myeloma (MM) is an incurable cancer and is the leading indication for autologous hematopoietic stem cell transplantation (HSCT). To be eligible for HSCT, a patient must have a caregiver, as caregivers play a central role in HSCT preparation and recovery. MM patients remain on treatment indefinitely, and thus patients and their caregivers face long-term challenges including the intensity of HSCT and perpetual therapy after transplant. Importantly, both patients and their caregivers show heightened depressive and anxiety symptoms, with dyadic correspondence evidenced and caregivers' distress often exceeding that of patients...
April 19, 2024: Brain, Behavior, and Immunity
#40
JOURNAL ARTICLE
Jesper P Bömers, Anja Holm, Spyridoula Kazantzi, Professor Lars Edvinsson, Professor Tiit I Mathiesen, Kristian A Haanes
OBJECTIVES: Subarachnoid haemorrhage (SAH) carries a high burden of morbidity and mortality. One in three patients develop vasospasm, which is associated with Delayed Cerebral Ischemia. The pathophysiology includes vasoconstrictor receptor upregulation in cerebral arteries. The protein kinase C - inhibitor RO-31-7549 reduces the expression of several vasoconstrictor receptors and normalizes cerebral blood flow in experimental SAH but functional and behavioural effects are unknown. This study was undertaken to analyse functional outcomes up to 14 days after experimental SAH...
April 19, 2024: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
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