1
|
Wang CC, Hu XM, Long YF, Huang HR, He Y, Xu ZR, Qi ZQ. Treatment of Parkinson's disease model with human umbilical cord mesenchymal stem cell-derived exosomes loaded with BDNF. Life Sci 2024; 356:123014. [PMID: 39182566 DOI: 10.1016/j.lfs.2024.123014] [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: 10/30/2023] [Revised: 08/19/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
AIMS Parkinson's disease (PD) is a common neurodegenerative disease that has received widespread attention; however, current clinical treatments can only relieve its symptoms, and do not effectively protect dopaminergic neurons. The purpose of the present study was to investigate the therapeutic effects of human umbilical cord mesenchymal stem cell-derived exosomes loaded with brain-derived neurotrophic factor (BDNF-EXO) on PD models and to explore the underlying mechanisms of these effects. MAIN METHODS 6-Hydroxydopamine was used to establish in vivo and in vitro PD models. Western blotting, flow cytometry, and immunofluorescence were used to detect the effects of BDNF-EXO on apoptosis and ferroptosis in SH-SY5Y cells. The in vivo biological distribution of BDNF-EXO was detected using a small animal imaging system, and dopaminergic neuron improvements in brain tissue were detected using western blotting, immunofluorescence, immunohistochemistry, and Nissl and Prussian blue staining. KEY FINDINGS BDNF-EXO effectively suppressed 6-hydroxydopamine-induced apoptosis and ferroptosis in SH-SY5Y cells. Following intravenous administration, BDNF-EXO crossed the blood-brain barrier to reach afflicted brain regions in mice, leading to a notable enhancement in neuronal survival. Furthermore, BDNF-EXO modulated microtubule-associated protein 2 and phosphorylated tau expression, thereby promoting neuronal cytoskeletal stability. Additionally, BDNF-EXO bolstered cellular antioxidant defense mechanisms through the activation of the nuclear factor erythroid 2-related factor 2 signaling pathway, thereby conferring neuroprotection against damage. SIGNIFICANCE The novel drug delivery system, BDNF-EXO, had substantial therapeutic effects in both in vivo and in vitro PD models, and may represent a new treatment strategy for PD.
Collapse
Affiliation(s)
- Can-Can Wang
- Medical College, Guangxi University, Da-Xue-Dong Road No.100, Nanning 530004, Guangxi Zhuang Autonomous Region, China
| | - Xin-Mei Hu
- Medical College, Guangxi University, Da-Xue-Dong Road No.100, Nanning 530004, Guangxi Zhuang Autonomous Region, China
| | - Yu-Fei Long
- Medical College, Guangxi University, Da-Xue-Dong Road No.100, Nanning 530004, Guangxi Zhuang Autonomous Region, China
| | - Hong-Ri Huang
- GuangXi TaiMeiRenSheng Biotechnology Co., LTD., Nanning, Guangxi 530000, China
| | - Ying He
- Medical College, Guangxi University, Da-Xue-Dong Road No.100, Nanning 530004, Guangxi Zhuang Autonomous Region, China
| | - Zhi-Ran Xu
- Translational Medicine Research Center, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi 530011, China
| | - Zhong-Quan Qi
- Medical College, Guangxi University, Da-Xue-Dong Road No.100, Nanning 530004, Guangxi Zhuang Autonomous Region, China.
| |
Collapse
|
2
|
Luo X, Xie X, Zhang L, Shi Y, Fu B, Yuan L, Zhang Y, Jiang Y, Ke W, Yang B. Uncovering the mechanisms of host mitochondrial cardiolipin release in syphilis: Insights from human microvascular endothelial cells. Int J Med Microbiol 2024; 316:151627. [PMID: 38908301 DOI: 10.1016/j.ijmm.2024.151627] [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: 03/19/2024] [Revised: 05/21/2024] [Accepted: 06/16/2024] [Indexed: 06/24/2024] Open
Abstract
The release of host mitochondrial cardiolipin is believed to be the main factor that contributes to the production of anti-cardiolipin antibodies in syphilis. However, the precise mechanism by which mitochondria release cardiolipin in this context remains elusive. This study aimed to elucidate the mechanisms underlying mitochondrial cardiolipin release in syphilis. We conducted a cardiolipin quantitative assay and immunofluorescence analysis to detect mitochondrial cardiolipin release in human microvascular endothelial cells (HMEC-1), with and without Treponema pallidum (Tp) infection. Furthermore, we explored apoptosis, a key mechanism for mitochondrial cardiolipin release. The potential mediator molecules were then analyzed through RNA-sequence and subsequently validated using in vitro knockout techniques mediated by CRISPR-Cas9 and pathway-specific inhibitors. Our findings confirm that live-Tp is capable of initiating the release of mitochondrial cardiolipin, whereas inactivated-Tp does not exhibit this capability. Additionally, apoptosis detection further supports the notion that the release of mitochondrial cardiolipin occurs independently of apoptosis. The RNA-sequencing results indicated that microtubule-associated protein2 (MAP2), an axonogenesis and dendrite development gene, was up-regulated in HMEC-1 treated with Tp, which was further confirmed in syphilitic lesions by immunofluorescence. Notably, genetic knockout of MAP2 inhibited Tp-induced mitochondrial cardiolipin release in HMEC-1. Mechanically, Tp-infection regulated MAP2 expression via the MEK-ERK-HES1 pathway, and MEK/ERK phosphorylation inhibitors effectively block Tp-induced mitochondrial cardiolipin release. This study demonstrated that the infection of live-Tp enhanced the expression of MAP2 via the MEK-ERK-HES1 pathway, thereby contributing to our understanding of the role of anti-cardiolipin antibodies in the diagnosis of syphilis.
Collapse
Affiliation(s)
- Xi Luo
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Xiaoyuan Xie
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China; The First School of Clinical Medicine, Southern Medical University, Guangzhou, PR China
| | - Litian Zhang
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Yanqiang Shi
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Bo Fu
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Liyan Yuan
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Yan Zhang
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China
| | - Yinbo Jiang
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China.
| | - Wujian Ke
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China.
| | - Bin Yang
- Dermatology Hospital, Southern Medical University, Guangzhou, PR China.
| |
Collapse
|
3
|
Suiwal S, Wartenberg P, Boehm U, Schmitz F, Schwarz K. A Novel Cre Recombinase Mouse Strain for Cell-Specific Deletion of Floxed Genes in Ribbon Synapse-Forming Retinal Neurons. Int J Mol Sci 2024; 25:1916. [PMID: 38339191 PMCID: PMC10856425 DOI: 10.3390/ijms25031916] [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: 12/12/2023] [Revised: 01/28/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024] Open
Abstract
We generated a novel Cre mouse strain for cell-specific deletion of floxed genes in ribbon synapse-forming retinal neurons. Previous studies have shown that the RIBEYE promotor targets the expression of recombinant proteins such as fluorescently tagged RIBEYE to photoreceptors and retinal bipolar cells and generates fluorescent synaptic ribbons in situ in these neurons. Here, we used the same promotor to generate a novel transgenic mouse strain in which the RIBEYE promotor controls the expression of a Cre-ER(T2) recombinase (RIBEYE-Cre). To visualize Cre expression, the RIBEYE-Cre animals were crossed with ROSA26 tau-GFP (R26-τGFP) reporter mice. In the resulting RIBEYE-Cre/R26 τGFP animals, Cre-mediated removal of a transcriptional STOP cassette results in the expression of green fluorescent tau protein (tau-GFP) that binds to cellular microtubules. We detected robust tau-GFP expression in retinal bipolar cells. Surprisingly, we did not find fluorescent tau-GFP expression in mouse photoreceptors. The lack of tau-GFP reporter protein in these cells could be based on the previously reported absence of tau protein in mouse photoreceptors which could lead to the degradation of the recombinant tau protein. Consistent with this, we detected Cre and tau-GFP mRNA in mouse photoreceptor slices by RT-PCR. The transgenic RIBEYE-Cre mouse strain provides a new tool to study the deletion of floxed genes in ribbon synapse-forming neurons of the retina and will also allow for analyzing gene deletions that are lethal if globally deleted in neurons.
Collapse
Affiliation(s)
- Shweta Suiwal
- Institute of Anatomy and Cell Biology, Department of Neuroanatomy, Medical School, Saarland University, 66421 Homburg, Germany;
| | - Philipp Wartenberg
- Institute of Clinical and Experimental Pharmacology, Center for Molecular Signaling (PZMS) and Center for Gender-Specific Biology and Medicine (CGBM), Medical School, Saarland University, 66421 Homburg, Germany; (P.W.); (U.B.)
| | - Ulrich Boehm
- Institute of Clinical and Experimental Pharmacology, Center for Molecular Signaling (PZMS) and Center for Gender-Specific Biology and Medicine (CGBM), Medical School, Saarland University, 66421 Homburg, Germany; (P.W.); (U.B.)
| | - Frank Schmitz
- Institute of Anatomy and Cell Biology, Department of Neuroanatomy, Medical School, Saarland University, 66421 Homburg, Germany;
| | - Karin Schwarz
- Institute of Anatomy and Cell Biology, Department of Neuroanatomy, Medical School, Saarland University, 66421 Homburg, Germany;
| |
Collapse
|
4
|
Nag TC, Sharma B, Gorla S. Glycogen in retinal horizontal cells of the African mud catfish Clarias gariepinus (Burchell, 1822) and its physiological significance. Tissue Cell 2023; 83:102140. [PMID: 37329686 DOI: 10.1016/j.tice.2023.102140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 06/09/2023] [Accepted: 06/10/2023] [Indexed: 06/19/2023]
Abstract
This paper reports on glycogen store in the retinal horizontal cells (HC) of the African mud catfish Clarias gariepinus, as seen by histochemical reaction with periodic acid Schiff (PAS) and transmission electron microscopy in light- as well as dark-adapted state. Glycogen is abundant in the large somata and less in their axons, characterised ultrastructurally by many microtubules and extensive gap junctions interconnecting them. There was no apparent difference in glycogen content in HC somata between light- and dark adaptation, but the axons clearly showed absence of glycogen in dark condition. The HC somata (presynaptic) make synapses with dendrites in the outer plexiform layer. Müller cell inner processes, which contain more densely packed glycogen, invest the HC. Other cells of the inner nuclear layer do not show any appreciable content of glycogen. Rods, but not cones, contain abundant glycogen in their inner segments and synaptic terminals. It is likely that glycogen is used as energy substrate in hypoxia for this species that dwell muddy aquatic environment with low oxygen content. They appear to have high energy demand, and a high glycogen content in HC could act as a ready source to fulfil physiological processes, like microtubule-based transport of cargo from the large somata to axons and the maintenance of electrical activities across the gap junctions between the axonal processes. It is also likely that they can supplement glucose to the neighbouring inner nuclear layer neurons, which are clearly devoid of glycogen.
Collapse
Affiliation(s)
- Tapas C Nag
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India.
| | - Bhaskar Sharma
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Shilpa Gorla
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| |
Collapse
|
5
|
Zhou J, Welinder C, Ekström P. The Phosphoproteome of the Rd1 Mouse Retina, a Model of Inherited Photoreceptor Degeneration, Changes after Protein Kinase G Inhibition. Int J Mol Sci 2023; 24:9836. [PMID: 37372984 DOI: 10.3390/ijms24129836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
Retinitis pigmentosa (RP) is a frequent cause of blindness among the working population in industrial countries due to the inheritable death of photoreceptors. Though gene therapy was recently approved for mutations in the RPE65 gene, there is in general no effective treatment presently. Previously, abnormally high levels of cGMP and overactivation of its dependent protein kinase (PKG) have been suggested as causative for the fatal effects on photoreceptors, making it meaningful to explore the cGMP-PKG downstream signaling for more pathological insights and novel therapeutic target development purposes. Here, we manipulated the cGMP-PKG system in degenerating retinas from the rd1 mouse model pharmacologically via adding a PKG inhibitory cGMP-analogue to organotypic retinal explant cultures. A combination of phosphorylated peptide enrichment and mass spectrometry was then applied to study the cGMP-PKG-dependent phosphoproteome. We identified a host of novel potential cGMP-PKG downstream substrates and related kinases using this approach and selected the RAF1 protein, which may act as both a substrate and a kinase, for further validation. This showed that the RAS/RAF1/MAPK/ERK pathway may be involved in retinal degeneration in a yet unclarified mechanism, thus deserving further investigation in the future.
Collapse
Affiliation(s)
- Jiaming Zhou
- Ophthalmology, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, 221 00 Lund, Sweden
| | - Charlotte Welinder
- Mass Spectrometry, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, 221 00 Lund, Sweden
| | - Per Ekström
- Ophthalmology, Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, 221 00 Lund, Sweden
| |
Collapse
|
6
|
Li M, Peng L, Wang Z, Liu L, Cao M, Cui J, Wu F, Yang J. Roles of the cytoskeleton in human diseases. Mol Biol Rep 2023; 50:2847-2856. [PMID: 36609753 DOI: 10.1007/s11033-022-08025-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 10/12/2022] [Indexed: 01/08/2023]
Abstract
Recently, researches have revealed the key roles of the cytoskeleton in the occurrence and development of multiple diseases, suggesting that targeting the cytoskeleton is a viable approach for treating numerous refractory diseases. The cytoskeleton is a highly structured and complex network composed of actin filaments, microtubules, and intermediate filaments. In normal cells, these three cytoskeleton components are highly integrated and coordinated. However, the cytoskeleton undergoes drastic remodeling in cytoskeleton-related diseases, causing changes in cell polarity, affecting the cell cycle, leading to senescent diseases, and influencing cell migration to accelerate cancer metastasis. Additionally, mutations or abnormalities in cytoskeletal proteins and their related proteins are closely associated with several congenital diseases. Therefore, this review summarizes the roles of the cytoskeleton in cytoskeleton-related diseases as well as its potential roles in disease treatment to provide insights regarding the physiological functions and pathological roles of the cytoskeleton.
Collapse
Affiliation(s)
- Mengxin Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Li Peng
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, 610065, Chengdu, China
| | - Zhenming Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Lijia Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Mengjiao Cao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Jingyao Cui
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Fanzi Wu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China
| | - Jing Yang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cardiology and Endodontics, West China Hospital of Stomatology, Sichuan University, 610021, Chengdu, China.
| |
Collapse
|
7
|
Pathogenic mechanisms contributing to the vulnerability of aging human photoreceptor cells. Eye (Lond) 2021; 35:2917-2929. [PMID: 34079093 DOI: 10.1038/s41433-021-01602-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 04/29/2021] [Accepted: 05/10/2021] [Indexed: 01/04/2023] Open
Abstract
In human retina, photoreceptor cell death (PCD) is a slow but conspicuous event, which continues with aging. Rods die earlier than cones, the latter continue to alter in a subtle manner until advanced aging. This review summarizes the existing information on age-related changes in photoreceptor cells, especially cones and analyses the possible associated factors. Oxidative and nitrosative stress are involved in photoreceptor alterations, which may stem from light and iron toxicity and other sources. Lipid peroxidation in macular photoreceptor outer segments and mitochondrial aberrations are prominent in aging. It is important to understand how those changes ultimately trigger PCD. The redistribution of calbindin D-28K and long/middle-wavelength-sensitive opsin in the parafoveal and perifoveal cones, anomalies in their somata and axons are strong predictors of their increasing vulnerability with aging. Signs of reduced autophagy, with autophagosomes containing organelle remnants are seen in aging photoreceptor cells. Currently, mechanisms that lead to human PCD are unknown; some observations favour apoptosis as a pathway. Since cones appear to change slowly, there is an opportunity to reverse those changes before they die. Therefore, a full understanding of how cones alter and the molecular pathways they utilize for survival must be the future research goal. Recent approaches to prevent PCD in aging and diseases are highlighted.
Collapse
|
8
|
Wang H, Zeng X, Zhang X, Liu H, Xing H. Ammonia exposure induces oxidative stress and inflammation by destroying the microtubule structures and the balance of solute carriers in the trachea of pigs. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 212:111974. [PMID: 33508713 DOI: 10.1016/j.ecoenv.2021.111974] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/26/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Ammonia (NH3) is the most alkaline gaseous compound in the atmosphere and the primary gas pollutant in the piggery. It can cause irritation and damage to the airway after inhalation. However, the effects and toxicity mechanism of NH3 on the trachea are still unclear. In order to evaluate the toxic effects of NH3 inhalation on pig trachea, the changes of oxidative stress parameters (SOD, GSH, GSH-Px, and MDA), tissue structure and transcriptome in the trachea of pigs were examined after 30 days of exposure to NH3. Our results showed SOD, GSH-Px and GSH in the trachea in the NH3-treatment group were significantly decreased (P < 0.05) compared with the control group, on the contrary, MDA content was significantly higher (P < 0.05). The analysis of differentially expressed genes (DEGs) showed that 2542 DEGs (1109 up-regulated DEGs and 1433 down-regulated DEGs) were significantly changed under NH3 exposure, including many DEGs associated with inflammation, oxidative stress, microtubule activity and SLC family, and the qRT-PCR verification results of these DEGs were consistent with the transcriptome results. The results indicated that NH3 exposure could break down the mucosal barrier of the respiratory tract, induce oxidative stress and inflammation, reduce the activity of microtubules and disrupt the balance of SLC transporters. In this study, transcriptome analysis was used for the first time to explore the toxic mechanism of NH3 on pig trachea, providing new insights for better assessing the toxicity mechanism of NH3, as well as references for comparative medicine.
Collapse
Affiliation(s)
- Huan Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xiangyin Zeng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xinxin Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Honggui Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| | - Houjuan Xing
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| |
Collapse
|