1
|
Vimentin-Rab7a Pathway Mediates the Migration of MSCs and Lead to Therapeutic Effects on ARDS. Stem Cells Int 2021; 2021:9992381. [PMID: 34367295 PMCID: PMC8342148 DOI: 10.1155/2021/9992381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 07/14/2021] [Indexed: 01/29/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is difficult to treat and has a high mortality rate. Mesenchymal stem cells (MSCs) have an important therapeutic effect in ARDS. While the mechanism of MSC migration to the lungs remains unclear, the role of MSCs is of great clinical significance. To this end, we constructed vimentin knockout mice, extracted bone MSCs from the mice, and used them for the treatment of LPS-induced ARDS. H&E staining and Masson staining of mouse lung tissue allowed us to assess the degree of damage and fibrosis of mouse lung tissue. By measuring serum TNF-α, TGF-β, and INF-γ, we were able to monitor the release of inflammatory factors. Finally, through immunoprecipitation and gene knockout experiments, we identified upstream molecules that regulate vimentin and elucidated the mechanism that mediates MSC migration. As a result, we found that MSCs from wild-type mice can significantly alleviate ARDS and reduce lung inflammation, while vimentin gene knockout reduced the therapeutic effect of MSCs in ARDS. Cytological experiments showed that vimentin gene knockout can significantly inhibit the migration of MSCs and showed that it changes the proliferation and differentiation status of MSCs. Further experiments found that vimentin's regulation of MSC migration is mainly mediated by Rab7a. Rab7a knockout blocked the migration of MSCs and weakened the therapeutic effect of MSCs in ARDS. In conclusion, we have shown that the Vimentin-Rab7a pathway mediates migration of MSCs and leads to therapeutic effects in ARDS.
Collapse
|
2
|
Estrada-Bonilla YC, Castro PATS, Luna GLF, Souza ABA, Santos GS, Salvini TF, Leal AMO, Russo TL. Reaching task performance is associated to neuromuscular junction adaptations in rats with induced diabetes mellitus. ACTA ACUST UNITED AC 2020; 53:e8763. [PMID: 32520205 PMCID: PMC7279698 DOI: 10.1590/1414-431x20208763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 02/13/2020] [Indexed: 11/22/2022]
Abstract
Upper limb performance is affected by diabetes mellitus (DM). Neuromuscular junction (NMJ) is a key structure to understand the relationship between performance and morphology in DM. The aim of the study was to analyze NMJ plasticity due to DM in an animal model and its relationship with the function of forelimbs in rats. Twelve Wistar rats were divided into control (C) and DM groups. Animals were trained to perform a grasping task, following procedures of habituation, shaping, and reaching task. DM was induced using streptozotocin. Forelimb neuromuscular performance for dexterity was evaluated one day before DM induction and five weeks following induction. After that, biceps, triceps, and finger flexors and extensors were removed. Connective tissue and muscle fiber cross-sectional area (CSA) were measured. NMJ was assessed by its morphometric characteristics (area, perimeter, and maximum diameter), using ImageJ software. Motor performance analyses were made using single pellet retrieval task performance test. Student’s t-test was used for comparisons between groups. A significant decrease in all NMJ morphometric parameters was observed in the DM group compared with the C group. Results showed that DM generated NMJ retraction in muscles involved in a reaching task. These alterations are related to signs of muscular atrophy and to poor reaching task performance. In conclusion, induced DM caused NMJ retraction and muscular atrophy in muscles involved in reaching task performance. Induced DM caused significantly lower motor performance, especially in the final moments of evaluation, when DM compromised the tropism of the muscular tissue.
Collapse
Affiliation(s)
- Y C Estrada-Bonilla
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil.,Body, Subject and Education Research Group, Universidad Santo Tomás de Aquino, Bogotá, D.C., Colombia
| | - P A T S Castro
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - G L F Luna
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - A B A Souza
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - G S Santos
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - T F Salvini
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - A M O Leal
- Departamento de Medicina, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - T L Russo
- Departamento de Fisioterapia, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| |
Collapse
|
3
|
Luna GLF, Russo TL, Sabadine MA, Estrada‐Bonilla YC, Andrade ALM, Brassolatti P, Anibal FF, Leal ÂMO. Effects of mesenchymal stromal cells on motor function and collagen in the skeletal muscles of rats with type I diabetes. Int J Exp Pathol 2019; 100:359-368. [PMID: 32026546 PMCID: PMC7042733 DOI: 10.1111/iep.12340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/26/2019] [Accepted: 12/01/2019] [Indexed: 12/12/2022] Open
Abstract
The present study aimed to evaluate the effects of mesenchymal stromal cell (MSC) transplantation on motor function and collagen organization in the muscles of rats with type 1 diabetes mellitus. Male Wistar rats were randomly assigned to three groups: control (C), diabetic (DM) and diabetic treated with MSCs (DM-MSCs). Diabetes was induced by streptozotocin (50 µg/kg). Bone marrow cells were isolated from the tibia and femur. After 10 weeks of DM induction, the DM-MSC rats received four i.p. injections of MSCs (1 × 106). Ten weeks after MSC transplantation, motor performance was evaluated by the rotarod test and the anterior tibial (TA) muscles were collected for morphometric and quantification of collagen birefringence by polarizing microscopy analysis. Motor performance of the DM group was significantly reduced when compared to the C group and increased significantly in the DM + MSC group. The TA muscle mass was significantly reduced in the DM and DM + MSC groups compared to the C group. The connective tissue increased in the DM group compared to the C group and decreased in the DM + MSC group. The percentage collagen birefringence decreased significantly in the DM group when compared to the C group and increased in the DM + MSC group. Motor performance was positively correlated with collagen birefringence and negatively correlated with percentage of connective tissue. The results indicate that MSC transplantation improves both motor function and the collagen macromolecular organization in type 1 DM.
Collapse
Affiliation(s)
- Genoveva L. F. Luna
- Department of MedicineFederal University of São Carlos (UFSCar)São CarlosBrazil
| | - Thiago L. Russo
- Department of Physical TherapyFederal University of São CarlosSão CarlosBrazil
| | - Maria A. Sabadine
- Department of MedicineFederal University of São Carlos (UFSCar)São CarlosBrazil
| | | | - Ana L. M. Andrade
- Department of Physical TherapyFederal University of São CarlosSão CarlosBrazil
| | - Patricia Brassolatti
- Department of Morphology and PathologyFederal University of São CarlosSão CarlosBrazil
| | - Fernanda F. Anibal
- Department of Morphology and PathologyFederal University of São CarlosSão CarlosBrazil
| | - Ângela M. O. Leal
- Department of Physical TherapyFederal University of São CarlosSão CarlosBrazil
| |
Collapse
|