1
|
Huang KT, Wagner LE, Takano T, Lin XX, Bagavant H, Deshmukh U, Yule DI. Dysregulated Ca 2+ signaling, fluid secretion, and mitochondrial function in a mouse model of early Sjögren's syndrome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.19.585719. [PMID: 38562738 PMCID: PMC10983907 DOI: 10.1101/2024.03.19.585719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Saliva is essential for oral health. The molecular mechanisms leading to physiological fluid secretion are largely established, but factors that underlie secretory hypofunction, specifically related to the autoimmune disease Sjögren's syndrome (SS) are not fully understood. A major conundrum is the lack of association between the severity of inflammatory immune cell infiltration within the salivary glands and glandular hypofunction. In this study, we investigated in a mouse model system, mechanisms of glandular hypofunction caused by the activation of the stimulator of interferon genes (STING) pathway. Glandular hypofunction and SS-like disease were induced by treatment with 5,6-Dimethyl-9-oxo-9H-xanthene-4-acetic acid (DMXAA), a small molecule agonist of murine STING. Contrary to our expectations, despite a significant reduction in fluid secretion in DMXAA-treated mice, in vivo imaging demonstrated that neural stimulation resulted in greatly enhanced spatially averaged cytosolic Ca2+ levels. Notably, however, the spatiotemporal characteristics of the Ca2+ signals were altered to signals that propagated throughout the entire cytoplasm as opposed to largely apically confined Ca2+ rises observed without treatment. Despite the augmented Ca2+ signals, muscarinic stimulation resulted in reduced activation of TMEM16a, although there were no changes in channel abundance or absolute sensitivity to Ca2+. However, super-resolution microscopy revealed a disruption in the intimate colocalization of Inositol 1,4,5-trisphosphate receptor Ca2+ release channels in relation to TMEM16a. TMEM16a channel activation was also reduced when intracellular Ca2+ buffering was increased. These data are consistent with altered local coupling between the channels contributing to the reduced activation of TMEM16a. Appropriate Ca2+ signaling is also pivotal for mitochondrial morphology and bioenergetics and secretion is an energetically expensive process. Disrupted mitochondrial morphology, a depolarized mitochondrial membrane potential, and reduced oxygen consumption rate were observed in DMXAA-treated animals compared to control animals. We report that early in SS disease, dysregulated Ca2+ signals lead to decreased fluid secretion and disrupted mitochondrial function contributing to salivary gland hypofunction and likely the progression of SS disease.
Collapse
Affiliation(s)
- Kai-Ting Huang
- Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Rochester, NY. 14526
| | - Larry E. Wagner
- Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Rochester, NY. 14526
| | - Takahiro Takano
- Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Rochester, NY. 14526
| | - Xiao-Xuan Lin
- Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Rochester, NY. 14526
| | - Harini Bagavant
- Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation, 825 NE 13 Street, Oklahoma City, OK 73104
| | - Umesh Deshmukh
- Arthritis and Clinical Immunology, Oklahoma Medical Research Foundation, 825 NE 13 Street, Oklahoma City, OK 73104
| | - David I. Yule
- Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Rochester, NY. 14526
| |
Collapse
|
2
|
Speelman-Rooms F, Vanmunster M, Coughlan A, Hinrichs M, Pontisso I, Barbeau S, Parpaite T, Bultynck G, Brohus M. 10th European Calcium Society symposium: The Ca2+-signaling toolkit in cell function, health and disease. Biol Open 2024; 13:bio060357. [PMID: 38661208 PMCID: PMC11070784 DOI: 10.1242/bio.060357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Abstract
The 10th European Calcium Society symposium, organized in Leuven, Belgium on November 15-17, 2023, focused on the role of Ca2+ signaling in cell function, health and disease. The symposium featured six scientific sessions, 16 invited speakers - of whom two were postdoctoral researchers - and 14 short talks. The talks covered various aspects of intracellular Ca2+ signaling and its implications in pathology. Each session was opened by one or more invited speakers, followed by a series of presentations from speakers selected from submitted abstracts. Through short talks, poster presentations, awards, and sustainable travel fellowships, the symposium also fostered opportunities for the active participation of early-career researchers. At least half of the short talks were allocated to early-career researchers, thereby offering a platform for the presentation of ongoing work and unpublished results. Presentations were also broadcast in real-time for online attendees. In this Meeting Review, we aim to capture the spirit of the meeting and discuss the main take-home messages that emerged during the symposium.
Collapse
Affiliation(s)
- Femke Speelman-Rooms
- KU Leuven, Lab. Molecular & Cellular Signaling, Dep. Cellular & Molecular Medicine, Campus Gasthuisberg O/N-I bus 802, Herestraat 49, B-3000 Leuven, Belgium
- KU Leuven, Lab. Chemical Biology, Dep. Cellular & Molecular Medicine, Campus Gasthuisberg O/N-I bus 901, Herestraat 49, B-3000 Leuven, Belgium
| | - Maarten Vanmunster
- KU Leuven, Lab. Molecular & Cellular Signaling, Dep. Cellular & Molecular Medicine, Campus Gasthuisberg O/N-I bus 802, Herestraat 49, B-3000 Leuven, Belgium
| | - Aled Coughlan
- Cardiff University, Biomedicine Division, School of Biosciences, Sir Martin Evans Building, Museum Avenue, CF10 3AX, Cardiff, Wales, UK
| | - Macarena Hinrichs
- University Medical Center Hamburg-Eppendorf, The Calcium Signalling Group, Department of Biochemistry and Molecular Cell Biology, Hamburg 20251, Germany
| | - Ilaria Pontisso
- Institut de Biologie Intégrative de la Cellule (I2BC) - Université Paris-Saclay, Gif-Sur-Yvette, 91190, France
| | - Solene Barbeau
- UC Louvain, Institute of Neuroscience, Pôle Cellulaire et Moléculaire, avenue Mounier 53, 1200 Brussels, Belgium
| | - Thibaud Parpaite
- UC Louvain, Institute of Neuroscience, Pôle Cellulaire et Moléculaire, avenue Mounier 53, 1200 Brussels, Belgium
| | - Geert Bultynck
- KU Leuven, Lab. Molecular & Cellular Signaling, Dep. Cellular & Molecular Medicine, Campus Gasthuisberg O/N-I bus 802, Herestraat 49, B-3000 Leuven, Belgium
| | - Malene Brohus
- Aalborg University, Dept. Chemistry and Bioscience, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| |
Collapse
|
3
|
Mishra A, Agrawal M, Ali A, Garg P. Uninterrupted real-time cerebral stress level monitoring using wearable biosensors: A review. Biotechnol Appl Biochem 2023; 70:1895-1914. [PMID: 37455443 DOI: 10.1002/bab.2491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/15/2023] [Indexed: 07/18/2023]
Abstract
Stress is the major unseen bug for the health of humans with the increasing workaholic era. Long periods of avoidance are the main precursor for chronic disorders that are quite tough to treat. As precaution is better than cure, stress detection and monitoring are vital. Although there are ways to measure stress clinically, there is still a constant need and demand for methods that measure stress personally and in an ex vitro manner for the convenience of the user. The concept of continuous stress monitoring has been introduced to tackle the issue of unseen stress accumulating in the body simultaneously with being user-friendly and reliable. Stress biosensors nowadays provide real-time, noninvasive, and continuous monitoring of stress. These biosensors are innovative anthropogenic creations that are a combination of biomarkers and indicators like heart rate variation, electrodermal activity, skin temperature, galvanic skin response, and electroencephalograph of stress in the body along with machine learning algorithms and techniques. The collaboration of biological markers, artificial intelligence techniques, and data science tools makes stress biosensors a hot topic for research. These attributes have made continuous stress detection a possibility with ease. The advancement in stress biosensing technologies has made a great impact on the lives of human beings so far. This article focuses on the comprehensive study of stress-indicating biomarkers and the techniques along with principles of the biosensors used for continuous stress detection. The precise overview of wearable stress monitoring systems is also sectioned to pave a pathway for possible future research studies.
Collapse
Affiliation(s)
- Anuja Mishra
- Department of Biotechnology, Institute of Applied Science & Humanities, GLA University, Mathura, Uttar Pradesh, India
| | - Mukti Agrawal
- Department of Biotechnology, Institute of Applied Science & Humanities, GLA University, Mathura, Uttar Pradesh, India
| | - Aaliya Ali
- School of Applied Sciences and Biotechnology, Shoolini University, Solan, Himachal Pradesh, India
- Center for Omics and Biodiversity Research, Shoolini University, Solan, Himachal Pradesh, India
| | - Prakrati Garg
- School of Applied Sciences and Biotechnology, Shoolini University, Solan, Himachal Pradesh, India
- Center for Omics and Biodiversity Research, Shoolini University, Solan, Himachal Pradesh, India
| |
Collapse
|
4
|
Wahl AM, Takano T, Su S, Warner BM, Perez P, Sneyd J, Yule DI. Structural and functional analysis of salivary intercalated duct cells reveals a secretory phenotype. J Physiol 2023; 601:4539-4556. [PMID: 37724716 PMCID: PMC10591963 DOI: 10.1113/jp285104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/30/2023] [Indexed: 09/21/2023] Open
Abstract
Currently, all salivary ducts (intercalated, striated and collecting) are assumed to function broadly in a similar manner, reclaiming ions that were secreted by the secretory acinar cells while preserving fluid volume and delivering saliva to the oral cavity. Nevertheless, there has been minimal investigation into the structural and functional differences between distinct types of salivary duct cells. Therefore, in this study, the expression profile of proteins involved in stimulus-secretion coupling, as well as the function of the intercalated duct (ID) and striated duct cells, was examined. Particular focus was placed on defining differences between distinct duct cell populations. To accomplish this, immunohistochemistry and in situ hybridization were utilized to examine the localization and expression of proteins involved in reabsorption and secretion of ions and fluid. Further, in vivo calcium imaging was employed to investigate cellular function. Based on the protein expression profile and functional data, marked differences between the IDs and striated ducts were observed. Specifically, the ID cells express proteins native to the secretory acinar cells while lacking proteins specifically expressed in the striated ducts. Further, the ID and striated duct cells display different calcium signalling characteristics, with the IDs responding to a neural stimulus in a manner similar to the acinar cells. Overall, our data suggest that the IDs have a distinct role in the secretory process, separate from the reabsorptive striated ducts. Instead, based on our evidence, the IDs express proteins found in secretory cells, generate calcium signals in a manner similar to acinar cells, and, therefore, are likely secretory cells. KEY POINTS: Current studies examining salivary intercalated duct cells are limited, with minimal documentation of the ion transport machinery and the overall role of the cells in fluid generation. Salivary intercalated duct cells are presumed to function in the same manner as other duct cells, reclaiming ions, maintaining fluid volume and delivering the final saliva to the oral cavity. Here we systematically examine the structure and function of the salivary intercalated duct cells using immunohistochemistry, in situ hybridization and by monitoring in vivo Ca2+ dynamics. Structural data revealed that the intercalated duct cells lack proteins vital for reabsorption and express proteins necessary for secretion. Ca2+ dynamics in the intercalated duct cells were consistent with those observed in secretory cells and resulted from GPCR-mediated IP3 production.
Collapse
Affiliation(s)
- Amanda M Wahl
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY, USA
| | - Takahiro Takano
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY, USA
| | - Shan Su
- Department of Mathematics, University of Auckland, Auckland, New Zealand
| | | | - Paola Perez
- Salivary Disorders Unit, NIDCR, Bethesda, MD, USA
| | - James Sneyd
- Department of Mathematics, University of Auckland, Auckland, New Zealand
| | - David I Yule
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY, USA
| |
Collapse
|