Article
Biology
Julia Hesselbarth, Carla Schmidt
Summary: The SNARE complex is composed of vesicular Synaptobrevin-2, Syntaxin-1, and SNAP25, and it mediates fusion between synaptic vesicles and the presynaptic plasma membrane. This study investigates the stepwise assembly of the SNARE complex and its interactions with Complexin-1 using native mass spectrometry and chemical cross-linking. The results provide insights into the stoichiometry of intermediates and off-pathway complexes, as well as the regulation of complex assembly by Complexin-1.
COMMUNICATIONS BIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Anton Joseph, Anna M. Wagner, Manuela Garay-Sarmiento, Mina Aleksanyan, Tamas Haraszti, Dominik Soeder, Vasil N. Georgiev, Rumiana Dimova, Virgil Percec, Cesar Rodriguez-Emmenegger
Summary: In this study, a new type of Janus dendrimer is introduced, which can self-assemble into a mimetic cell membrane structure that closely resembles the characteristics of a natural cell membrane in terms of thickness, flexibility, and fluidity. This mimetic cell membrane exhibits resilience to harsh conditions and faster dynamics in closing pores in the event of membrane rupture. It can be used to create hybrid structures with components of natural cell membranes and has the potential to simulate life-like features such as vesicle fusion, motility, and environmental sensing.
ADVANCED MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Adriano Caliari, Martin M. Hanczyc, Masayuki Imai, Jian Xu, Tetsuya Yomo
Summary: Artificial cells are being used to engineer cell-mimicking structures, with giant unilamellar vesicle fusion being a crucial step. Several techniques have been developed to accomplish this, but automation of fusion detection and characterization is now necessary for high-throughput screenings. We implemented a fusion assay based on fluorophore colocalization to assess lipid and content transfer in vesicles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Nadine Gruteser, Arnd Baumann
Summary: GTP-binding protein-coupled receptors (GPCRs) play important roles in physiology and neuronal signaling. This study investigated the kinetics of two common GPCR-induced signaling pathways and revealed the time difference between receptor activation and signal output.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Computer Science, Interdisciplinary Applications
Hone-Jay Chu, Muhammad Zeeshan Ali, Thomas J. Burbey
Summary: This study estimated high spatio-temporal resolution land subsidence through data fusion, revealing that subsidence hotspots vary with time and space, aiding in explaining the spatio-temporal variability of the subsidence pattern.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Geography, Physical
Haoqing Li, Bhavya Duvvuri, Ricardo Borsoi, Tales Imbiriba, Edward Beighley, Deniz Erdogmus, Pau Closas
Summary: Real-time satellite imaging plays a crucial role in monitoring and estimating natural phenomena such as floods and earthquakes. This paper focuses on fusing multi-temporal, multi-spectral images acquired from different instruments with different spatial resolutions. The proposed methodology leverages the spatial relationship between images to generate high-resolution image sequences at higher revisiting rates. Experimental results show that the proposed methodology outperforms competing methods in estimation accuracy and water mapping tasks.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2023)
Article
Chemistry, Multidisciplinary
Marcos Arribas Perez, Paul A. Beales
Summary: The study demonstrates that SiO2 NPs can efficiently induce membrane fusion in biomimetic model membranes, likely by increasing lateral membrane tension. Real-time microscopy reveals three distinct mechanistic pathways for membrane fusion. SiO2 NPs show significant potential for inclusion in the synthetic biology toolkit for membrane remodeling and fusion in artificial cells.
Article
Cell Biology
Guoyi Yang, Liuju Li, Yanmei Liu, Kuo Liang, Lisi Wei, Liangyi Chen
Summary: Impaired insulin release in type 2 diabetes is closely related to chronically elevated glucose concentrations. This study found that high glucose delays fusion events, reduces full fusion, and decreases the size of fusion pores, all contributing to compromised insulin secretion.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Article
Computer Science, Artificial Intelligence
Wei Sun, Dong Gong, Javen Qinfeng Shi, Anton van den Hengel, Yanning Zhang
Summary: Video super-resolution aims to recover high-resolution content from low-resolution frames by combining spatial-temporal information. This study proposes a mixed spatial-temporal convolution block and a similarity-based selective features strategy to enhance feature extraction and fusion, and introduces an attention-based motion compensation module to alleviate frame misalignment.
PATTERN RECOGNITION
(2022)
Article
Neurosciences
Balagopal Pai, Jessica Tome-Garcia, Wan Sze Cheng, German Nudelman, Kristin G. Beaumont, Saadi Ghatan, Fedor Panov, Elodia Caballero, Kwadwo Sarpong, Lara Marcuse, Jiyeoun Yoo, Yan Jiang, Anne Schaefer, Schahram Akbarian, Robert Sebra, Dalila Pinto, Elena Zaslavsky, Nadejda M. Tsankova
Summary: The pathophysiology of epilepsy involves dysfunction between neurons and glia. This study isolates and characterizes distinct transcriptomes of neuronal, astrocyte, and oligodendroglial progenitor populations in epilepsy surgical samples. Single cell transcriptomics revealed a subpopulation of glia with a hybrid signature of reactive astrocytes and oligodendroglial progenitors. Further analysis confirmed the unique presence of these hybrid glia in epilepsy. This study provides insights into the role of reactive glia in temporal lobe epilepsy.
ACTA NEUROPATHOLOGICA COMMUNICATIONS
(2022)
Article
Environmental Sciences
Xiaohong Yang, Qiannian Chu, Lizhe Wang, Menghui Yu
Summary: Water body mapping is important for water resource management. This study proposes a super-resolution mapping method based on spectral similarity and multiscale spatio-temporal dependence for generating high-resolution water body maps. Experimental results show that this method performs the best in terms of overall accuracy, distribution, and detailed information of the water map, indicating its high potential and efficiency in water body mapping.
Article
Medicine, Research & Experimental
Meihen Sun, Xu Han, Fei Chang, Hongfei Xu, Lesley Colgan, Yongjian Liu
Summary: SNX5 is identified as a novel regulator for both stability and SV targeting of VAChT.
JOURNAL OF BIOMEDICAL RESEARCH
(2021)
Review
Biochemistry & Molecular Biology
Najeeb Ullah, Ezzouhra El Maaiden, Md Sahab Uddin, Ghulam Md Ashraf
Summary: This review focuses on the role of the Syt-1 protein in secretory vesicle docking, priming, and fusion. It highlights how Syt-1 acts as a Ca2+ sensor and participates in forming the docking complex to facilitate vesicle fusion with the plasma membrane.
CURRENT PROTEIN & PEPTIDE SCIENCE
(2021)
Article
Biophysics
Jason M. Warner, Dong An, Benjamin S. Stratton, Ben O'Shaughnessy
Summary: Membrane fusion is a critical step in many essential processes, but its mechanisms are poorly understood. Protein-free fusion driven by calcium or other cations has provided a simplified model, but the pathway selection mechanism remains unknown. A mathematical model developed in this study identifies a highly dynamic hemifusion complex as the network hub. The fate of this complex determines the outcome of fusion, hemifusion, or vesicle lysis.
BIOPHYSICAL JOURNAL
(2023)
Article
Environmental Sciences
Vinicius Perin, Samapriya Roy, Joe Kington, Thomas Harris, Mirela G. Tulbure, Noah Stone, Torben Barsballe, Michele Reba, Mary A. Yaeger
Summary: Basemap and Planet Fusion datasets derived from PlanetScope imagery offer high spatial and temporal resolution for monitoring on-farm reservoirs (OFRs). Both datasets show high agreement and low uncertainty in monitoring OFRs surface area changes, with Basemap exhibiting higher surface area variability and susceptibility to cloud effects compared to Planet Fusion. These datasets can be useful in improving freshwater management by allowing better assessment and management of OFRs.
Article
Engineering, Biomedical
Vladimir Grubisic, Vladimir Parpura
Article
Biochemistry & Molecular Biology
Ulyana Lalo, Yuriy Pankratov, Vladimir Parpura, Alexei Verkhratsky
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
(2011)
Article
Biochemistry & Molecular Biology
Vladimir Parpura, Vladimir Grubisic, Alexei Verkhratsky
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
(2011)
Article
Biochemistry & Molecular Biology
Oliver C. Loson, Chang Man Ha, Vladimir Parpura
JOURNAL OF NEUROCHEMISTRY
(2011)
Review
Biology
Manoj K. Gottipati, Alexei Verkhratsky, Vladimir Parpura
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2014)
Article
Neurosciences
Annesha C. King, Tara E. Wood, Efrain Rodriguez, Vladimir Parpura, Michelle Gray
EXPERIMENTAL NEUROLOGY
(2020)
Article
Cell Biology
Manoj K. Gottipati, Elena Bekyarova, Robert C. Haddon, Vladimir Parpura
Article
Physiology
Xiaoran Wang, Tong Li, Yang Liu, Shuwei Jia, Xiaoyu Liu, Yunhao Jiang, Ping Wang, Vladimir Parpura, Yu-Feng Wang
Summary: The study demonstrates that the interaction between AQP4 and GFAP in the rat supraoptic nucleus can influence vasopressin neuronal activity through osmotic effects on astrocytes.
Article
Education, Scientific Disciplines
Xiaoran Wang, Xiao-Yu Liu, Shuwei Jia, Runsheng Jiao, Yunhong Zhang, Liyong Tang, Xiaoli Ni, Hui Zhu, Fengmin Zhang, Vladimir Parpura, Yu-Feng Wang
Summary: Teaching international medical students (IMSs) in higher education presents a challenge, as they have different learning obstacles and preferences from domestic students. A teaching modality called TESOT, which integrates a classical teacher-centered approach with student-centered components and online interactions, has been developed to target the specific characteristics of IMSs. The effectiveness of TESOT was demonstrated in the nervous system module of a Physiology course, leading to improved exam scores compared to traditional teaching methods.
ADVANCES IN PHYSIOLOGY EDUCATION
(2021)
Article
Physiology
Arun K. Rooj, Estelle Cormet-Boyaka, Edlira B. Clark, Yawar J. Qadri, William Lee, Ravindra Boddu, Anupam Agarwal, Richa Tambi, Mohammed Uddin, Vladimir Parpura, Eric J. Sorscher, Cathy M. Fuller, Bakhrom K. Berdiev
Summary: The study demonstrates a close physical association between CFTR and ENaC in the pathophysiology of cystic fibrosis, even in the presence of Liddle's syndrome mutations, suggesting a direct intermolecular interaction between these proteins. The findings are supported by coimmunoprecipitation and fluorescence resonance energy transfer measurements, indicating a potential therapeutic target for CF treatment.
AMERICAN JOURNAL OF PHYSIOLOGY-LUNG CELLULAR AND MOLECULAR PHYSIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Vedrana Montana, Daniel Flint, Helle S. Waagepetersen, Arne Schousboe, Vladimir Parpura
Summary: Glucose sustains glutamate release from astrocytes, while lactate significantly reduces it. Lactate alone increases fatty acid synthesis and leads to complex metabolic changes in astrocytes, suggesting that energy sources and metabolic environment play a significant role in gliotransmission. Proteomics analysis reveals condition-dependent changes in protein profiles, including alterations in cytoskeletal proteins and proteins involved in vesicle traffic and recycling at the plasma membrane.
NEUROCHEMICAL RESEARCH
(2021)
Article
Cell Biology
Wei Liu, Matjaz Stenovec, William Lee, Vedrana Montana, Marko Kreft, Robert Zorec, Vladimir Parpura
Summary: The interactive mechanical forces between individual SNARE proteins Sb2 and Sx1A are sufficient to mediate vesicle docking, suggesting that a trans binary Sx1A-Sb2 complex alone can play a crucial role in the cellular environment.
Article
Cell Biology
Xiaolu Zhang, Alyssa Wolfinger, Xiaojun Wu, Rawan Alnafisah, Ali Imami, Abdul-rizaq Hamoud, Anna Lundh, Vladimir Parpura, Robert E. McCullumsmith, Rammohan Shukla, Sinead M. O'Donovan
Summary: This study uses gene enrichment analysis to investigate the relationships between different astrocyte subtypes, psychiatric disorders, and psychotropic medications. The study identifies the enrichment of astrocyte subtypes in psychiatric disorders, with the highest level of enrichment found in schizophrenia. The study also reveals the complex responses of astrocytes under pathological conditions. Furthermore, the study finds limited common gene enrichment between psychotropic medications and astrocyte subtypes, suggesting that astrocytes are not the primary target of these medications.
Article
Cell Biology
Yang Liu, Xiao-Ran Wang, Yun-Hao Jiang, Tong Li, Shuo Ling, Hong-Yang Wang, Jia-Wei Yu, Shu-Wei Jia, Xiao-Yu Liu, Chun-Mei Hou, Vladimir Parpura, Yu-Feng Wang
Summary: The study investigated the interaction between astrocytic VRAC and AQP4 in SON, and found that their coordinated activities play a key role in the regulation of GFAP filament dynamics and the modulation of vasopressin neuronal activity.
Meeting Abstract
Neurosciences
V Parpura