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Shen C, Yang Q, Chen K, Ma H, Wang X, Tong J, Shen Y, Cui H. Uncovering the role of ferroptosis in Bietti crystalline dystrophy and potential therapeutic strategies. Cell Commun Signal 2024; 22:359. [PMID: 38992691 PMCID: PMC11241923 DOI: 10.1186/s12964-024-01710-x] [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: 03/18/2024] [Accepted: 06/09/2024] [Indexed: 07/13/2024] Open
Abstract
PURPOSE Bietti crystalline dystrophy (BCD) is an inherited retinal degeneration disease caused by mutations in the CYP4V2 gene. Currently, there is no clinical therapy approach available for BCD patients. Previous research has suggested that polyunsaturated fatty acids (PUFAs) may play a significant role in the development of BCD, implicating the involvement of ferroptosis in disease pathogenesis. In this work, we aimed to investigate the interplay between ferroptosis and BCD and to detect potential therapeutic strategies for the disease. METHODS Genetic-edited RPE cell line was first established in this study by CRISPR-Cas9 technology. Cyp4v3 (the homologous gene of human CYP4V2) knock out (KO) mice have also been used. Lipid profiling and transcriptome analysis of retinal pigment epithelium (RPE) cells from Cyp4v3 KO mice have been conducted. Ferroptosis phenotypes have been first investigated in BCD models in vitro and in vivo, including lipid peroxidation, mitochondrial changes, elevated levels of reactive oxygen species (ROS), and altered gene expression. Additionally, an iron chelator, deferiprone (DFP), has been tested in vitro and in vivo to determine its efficacy in suppressing ferroptosis and restoring the BCD phenotype. RESULTS Cyp4v3 KO mice exhibited progressive retinal degeneration and lipid accumulation, similar to the BCD phenotype, which was exacerbated by a high-fat diet (HFD). Increased levels of PUFAs, such as EPA (C22:5) and AA (C20:4), were observed in the RPE of Cyp4v3 KO mice. Transcriptome analysis of RPE in Cyp4v3 KO mice revealed changes in genes involved in iron homeostasis, particularly an upregulation of NCOA4, which was confirmed by immunofluorescence. Ferroptosis-related characteristics, including mitochondrial defects, lipid peroxidation, ROS accumulation, and upregulation of related genes, were detected in the RPE both in vitro and in vivo. Abnormal accumulation of ferrous iron was also detected. DFP, an iron chelator administration suppressed ferroptosis phenotype in CYP4V2 mutated RPE. Oral administration of DFP also restored the retinal function and morphology in Cyp4v3 KO mice. CONCLUSION This study represented the first evidence of the substantial role of ferroptosis in the development of BCD. PUFAs resulting from CYP4V2 mutation may serve as substrates for ferroptosis, potentially working in conjunction with NCOA4-regulated iron accumulation, ultimately leading to RPE degeneration. DFP administration, which chelates iron, has demonstrated its ability to reverse BCD phenotype both in vitro and in vivo, suggesting a promising therapeutic approach in the future.
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Affiliation(s)
- Chang Shen
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qianjie Yang
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Kuangqi Chen
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Huiling Ma
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiawei Wang
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jianping Tong
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ye Shen
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
| | - Hongguang Cui
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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Li Q, Wang C, Zhang S, Fu Z, Jiao X, Jin Z, Hejtmancik JF, Miao H, Qi S, Peng X. Targeted lipidomics uncovers oxylipin perturbations and potential circulation biomarkers in Bietti's crystalline dystrophy. Graefes Arch Clin Exp Ophthalmol 2024:10.1007/s00417-024-06554-2. [PMID: 38963460 DOI: 10.1007/s00417-024-06554-2] [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: 02/02/2024] [Revised: 06/04/2024] [Accepted: 06/12/2024] [Indexed: 07/05/2024] Open
Abstract
PURPOSE Abnormalities in lipid metabolism have been proposed in Bietti's crystalline dystrophy (BCD). We aim to characterize the lipid profiles in a case-control study. METHODS All participants were genetically confirmed by CYP4V2 gene sequencing and underwent chorioretinopathy evaluation by calculating the percentages of AF atrophy (PAFA). Fasting blood samples of BCD patients and controls were collected, and plasma was analyzed for routine lipid profiles. Targeted lipidomic evaluation includes long chain polyunsaturated fatty acids (LCPUFA) and associated eicosanoid metabolites. RESULTS Routine lipids profiles showed elevated plasma levels of triglyceride (P = 0.043) and low-density lipoprotein cholesterol (P = 0.024) in BCD patients. Lipidomic analysis showed significantly decreased levels of ω-3 LCPUFA including docosahexaenoic acid (DHA, 22:6, P = 0.00068) and eicosapentaenoic acid (EPA, 20:5, P = 0.0016), as well as ω-6 LCPUFA arachidonic acid (ARA, 20:4, P < 0.0001) in BCD patients. Eicosanoid metabolites, either derived from ω-3 and/ or ω-6 LCPUFAs via cyclooxygenase (COX) or lipoxygenase (LOX) pathways, including 5-HEPE, 12-HEPE, 13-HDHA, 15-HETE, 12-HETE, 5-HETE, 6k-PGF1a, PGE2, PGJ2, and TXB2, exhibited significant differences (P < 0.0001) between BCD patients and controls. Genotypes of CYP4V2, specifically the biallelic null mutations, were observed to correlate with more remarkably reduced levels of oxylipins, involving major LOX pathway metabolites including 5-HETE, 5-HEPE, 12-HEPE and LTB4. CONCLUSIONS BCD patients demonstrated significant decreases in plasma levels of ω-3 and ω-6 LCPUFA (DHA, EPA, and ARA), as well as their downstream metabolites via the COX and LOX pathways, suggesting that these might be implicated in BCD pathogenesis and could serve as biomarkers and therapeutic targets of the disease. KEY MESSAGES What is known BCD is a vision-threatening hereditary disease the causative gene of which is CYP4V2. Abnormalities in lipid metabolism have been proposed and demonstrated previously in BCD studies. The detailed pathogenesis remains unclear and controversial. What is new We observed prominent lipidomic alterations in the circulation when compared with age, gender, and bodymass index (BMI)-matched healthy controls. BCD patients demonstrated significant decreases in plasma levels of ω-3 and ω-6 LCPUFA (DHA, EPA, and ARA). Remarkable changes were observed in the downstream metabolites of the LCPUFA via the COX and LOX pathways. Genotypes of CYP4V2, specifically the biallelic null mutations, were observed to correlate with more remarkably reduced levels of oxylipins, involving major LOX pathway metabolites.
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Affiliation(s)
- Qian Li
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Capital Medical University, No.1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China.
| | - Cong Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Capital Medical University, No.1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China
| | | | - Zhongjie Fu
- Department of Ophthalmology, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA
| | - Xiaodong Jiao
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, MD, USA
| | - Zibing Jin
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - J Fielding Hejtmancik
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, MD, USA
| | - Huan Miao
- LipidALL Technologies Company Limited, Changzhou, Jiangsu, China
| | - Simeng Qi
- LipidALL Technologies Company Limited, Changzhou, Jiangsu, China
| | - Xiaoyan Peng
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Key Laboratory of Ophthalmology and Visual Sciences, Capital Medical University, No.1 Dongjiaominxiang, Dongcheng District, Beijing, 100730, China.
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Meng X, Jia R, Zhao X, Zhang F, Chen S, Yu S, Liu X, Dou H, Feng X, Zhang J, Wang N, Xu B, Yang L. In vivo genome editing via CRISPR/Cas9-mediated homology-independent targeted integration for Bietti crystalline corneoretinal dystrophy treatment. Nat Commun 2024; 15:3773. [PMID: 38710738 DOI: 10.1038/s41467-024-48092-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 04/22/2024] [Indexed: 05/08/2024] Open
Abstract
Bietti crystalline corneoretinal dystrophy (BCD) is an autosomal recessive chorioretinal degenerative disease without approved therapeutic drugs. It is caused by mutations in CYP4V2 gene, and about 80% of BCD patients carry mutations in exon 7 to 11. Here, we apply CRISPR/Cas9 mediated homology-independent targeted integration (HITI)-based gene editing therapy in HEK293T cells, BCD patient derived iPSCs, and humanized Cyp4v3 mouse model (h-Cyp4v3mut/mut) using two rAAV2/8 vectors via sub-retinal administration. We find that sgRNA-guided Cas9 generates double-strand cleavage on intron 6 of the CYP4V2 gene, and the HITI donor inserts the carried sequence, part of intron 6, exon 7-11, and a stop codon into the DNA break, achieving precise integration, effective transcription and translation both in vitro and in vivo. HITI-based editing restores the viability of iPSC-RPE cells from BCD patient, improves the morphology, number and metabolism of RPE and photoreceptors in h-Cyp4v3mut/mut mice. These results suggest that HITI-based editing could be a promising therapeutic strategy for those BCD patients carrying mutations in exon 7 to 11, and one injection will achieve lifelong effectiveness.
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Affiliation(s)
- Xiang Meng
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | - Ruixuan Jia
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | | | - Fan Zhang
- Beijing Chinagene Co., LTD, Beijing, China
| | | | - Shicheng Yu
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | - Xiaozhen Liu
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | - Hongliang Dou
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | - Xuefeng Feng
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | | | - Ni Wang
- Beijing Chinagene Co., LTD, Beijing, China
| | - Boling Xu
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China
| | - Liping Yang
- Department of Ophthalmology, Third Hospital, Peking University, Beijing, China.
- Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing, China.
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Wang J, Zhang J, Yu S, Li H, Chen S, Luo J, Wang H, Guan Y, Zhang H, Yin S, Wang H, Li H, Liu J, Zhu J, Yang Q, Sha Y, Zhang C, Yang Y, Yang X, Zhang X, Zhao X, Wang L, Yang L, Wei W. Gene replacement therapy in Bietti crystalline corneoretinal dystrophy: an open-label, single-arm, exploratory trial. Signal Transduct Target Ther 2024; 9:95. [PMID: 38653979 PMCID: PMC11039457 DOI: 10.1038/s41392-024-01806-3] [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: 11/10/2023] [Revised: 02/21/2024] [Accepted: 03/14/2024] [Indexed: 04/25/2024] Open
Abstract
Bietti crystalline corneoretinal dystrophy is an inherited retinal disease caused by mutations in CYP4V2, which results in blindness in the working-age population, and there is currently no available treatment. Here, we report the results of the first-in-human clinical trial (NCT04722107) of gene therapy for Bietti crystalline corneoretinal dystrophy, including 12 participants who were followed up for 180-365 days. This open-label, single-arm exploratory trial aimed to assess the safety and efficacy of a recombinant adeno-associated-virus-serotype-2/8 vector encoding the human CYP4V2 protein (rAAV2/8-hCYP4V2). Participants received a single unilateral subretinal injection of 7.5 × 1010 vector genomes of rAAV2/8-hCYP4V2. Overall, 73 treatment-emergent adverse events were reported, with the majority (98.6%) being of mild or moderate intensity and considered to be procedure- or corticosteroid-related; no treatment-related serious adverse events or local/systemic immune toxicities were observed. Compared with that measured at baseline, 77.8% of the treated eyes showed improvement in best-corrected visual acuity (BCVA) on day 180, with a mean ± standard deviation increase of 9.0 ± 10.8 letters in the 9 eyes analyzed (p = 0.021). By day 365, 80% of the treated eyes showed an increase in BCVA, with a mean increase of 11.0 ± 10.6 letters in the 5 eyes assessed (p = 0.125). Importantly, the patients' improvement observed using multifocal electroretinogram, microperimetry, and Visual Function Questionnaire-25 further supported the beneficial effects of the treatment. We conclude that the favorable safety profile and visual improvements identified in this trial encourage the continued development of rAAV2/8-hCYP4V2 (named ZVS101e).
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Affiliation(s)
- Jinyuan Wang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
- School of Clinical Medicine, Tsinghua University, 100084, Beijing, China
| | | | - Shicheng Yu
- Department of Ophthalmology, Peking University Third Hospital, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, 100191, Beijing, China
| | - Hongyan Li
- Chigenovo Co., Ltd., 102206, Beijing, China
| | | | - Jingting Luo
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Haibo Wang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
- Department of Ophthalmology, The Third People's Hospital of Dalian, 116091, Dalian, China
| | - Yuxia Guan
- Chigenovo Co., Ltd., 102206, Beijing, China
| | - Haihan Zhang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Shiyi Yin
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Huili Wang
- Chigenovo Co., Ltd., 102206, Beijing, China
| | - Heping Li
- Chigenovo Co., Ltd., 102206, Beijing, China
| | - Junle Liu
- Chigenovo Co., Ltd., 102206, Beijing, China
| | - Jingyuan Zhu
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Qiong Yang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Ying Sha
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Chuan Zhang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Yuhang Yang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Xuan Yang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Xifang Zhang
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Xiuli Zhao
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China
| | - Likun Wang
- Department of Biomedical Informatics, School of Basic Medical Sciences, Peking University Health Science Center, 100191, Beijing, China.
- Institute of Systems Biomedicine, Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, 100191, Beijing, China.
| | - Liping Yang
- Department of Ophthalmology, Peking University Third Hospital, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, 100191, Beijing, China.
| | - Wenbin Wei
- Beijing Tongren Eye Center, Beijing Key Laboratory of Intraocular Tumor Diagnosis and Treatment, Beijing Ophthalmology & Visual Sciences Key Lab, Medical Artificial Intelligence Research and Verification Key Laboratory of the Ministry of Industry and Information Technology, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China.
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Bai J, Yu B, Li C, Cheng H, Guan Y, Ren Z, Zhang T, Song X, Jia Z, Su T, Tao B, Gao H, Yang B, Liang L, Xiong X, Zhou X, Yin L, Peng J, Shang A, Wang Y. Mesenchymal Stem Cell-Derived Mitochondria Enhance Extracellular Matrix-Derived Grafts for the Repair of Nerve Defect. Adv Healthc Mater 2024; 13:e2302128. [PMID: 37922434 DOI: 10.1002/adhm.202302128] [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: 07/06/2023] [Revised: 10/27/2023] [Indexed: 11/05/2023]
Abstract
Peripheral nerve injuries (PNI) can lead to mitochondrial dysfunction and energy depletion within the affected microenvironment. The objective is to investigate the potential of transplanting mitochondria to reshape the neural regeneration microenvironment. High-purity functional mitochondria with an intact structure are extracted from human umbilical cord-derived mesenchymal stem cells (hUCMSCs) using the Dounce homogenization combined with ultracentrifugation. Results show that when hUCMSC-derived mitochondria (hUCMSC-Mitos) are cocultured with Schwann cells (SCs), they promote the proliferation, migration, and respiratory capacity of SCs. Acellular nerve allografts (ANAs) have shown promise in nerve regeneration, however, their therapeutic effect is not satisfactory enough. The incorporation of hUCMSC-Mitos within ANAs has the potential to remodel the regenerative microenvironment. This approach demonstrates satisfactory outcomes in terms of tissue regeneration and functional recovery. Particularly, the use of metabolomics and bioenergetic profiling is used for the first time to analyze the energy metabolism microenvironment after PNI. This remodeling occurs through the enhancement of the tricarboxylic acid cycle and the regulation of associated metabolites, resulting in increased energy synthesis. Overall, the hUCMSC-Mito-loaded ANAs exhibit high functionality to promote nerve regeneration, providing a novel regenerative strategy based on improving energy metabolism for neural repair.
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Affiliation(s)
- Jun Bai
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Co-innovation Center of Neuroregeneration, Nantong University Nantong, Jiangsu Province, 226007, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Bingbing Yu
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Chaochao Li
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Haofeng Cheng
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- School of Medicine, Nankai University, Tianjin, 300071, P. R. China
| | - Yanjun Guan
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Zhiqi Ren
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Tieyuan Zhang
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Xiangyu Song
- School of Medicine, Hebei North University, Zhangjiakou, 075051, P. R. China
| | - Zhibo Jia
- School of Medicine, Hebei North University, Zhangjiakou, 075051, P. R. China
| | - Tianqi Su
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Benzhang Tao
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Haihao Gao
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Boyao Yang
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Lijing Liang
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Xing Xiong
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Xingyu Zhou
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
- Graduate School of Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Lan Yin
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Jiang Peng
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Co-innovation Center of Neuroregeneration, Nantong University Nantong, Jiangsu Province, 226007, P. R. China
| | - Aijia Shang
- Department of Neurosurgery, General Hospital of Chinese People Liberty Army, No. 28 Fuxing Road, Beijing, 100853, P. R. China
| | - Yu Wang
- Institute of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, No. 51 Fucheng Road, Beijing, 100048, P. R. China
- Co-innovation Center of Neuroregeneration, Nantong University Nantong, Jiangsu Province, 226007, P. R. China
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Montemagni M, Arrigo A, Battaglia Parodi M, Bianco L, Antropoli A, Malegori A, Bandello F, Tranfa F, Costagliola C. Optical coherence tomography angiography in Bietti crystalline dystrophy. Eur J Ophthalmol 2023; 33:NP1-NP5. [PMID: 36457241 PMCID: PMC10590012 DOI: 10.1177/11206721221143156] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 10/24/2022] [Indexed: 10/22/2023]
Abstract
PURPOSE Bietti crystalline dystrophy (BCD) is a rare autosomal recessive retinal dystrophy caused by pathogenic variants of CYP4V2 gene and characterized by shiny yellow deposits in the retina and progressive atrophy of the retinal pigment epithelium (RPE) and choriocapillaris. The main aim of the present study is to describe the optical coherence tomography angiography (OCTA) characteristics of a patient affected by BCD. METHODS A 59-years-old female with genetically confirmed BCD underwent an ophthalmological examination complete of OCTA performed in the atrophic retina, the junctional zone and the apparently normal retina. The area of choriocapillaris (CC) atrophy was compared to the area of RPE atrophy on fundus autofluorescence (FAF) imaging. RESULTS A severe vessel density (VD) deficit at the level of superficial and deep capillary plexa as well as CC was registered in atrophic areas, which resulted deeper with respect to the junctional area, whereas the apparently preserved retina revealed VD values similar to that of control eyes. The area of RPE atrophy on FAF was larger (55.90 mm2 in right eye and 48.76 mm2 in left eye) than the area of CC atrophy on OCTA imaging (51.86 mm2 and 42.44 mm2 respectively in right and left eye). CONCLUSIONS Our findings suggest that VD impairment of retinal plexa and CC follows the degeneration of RPE as demonstrated by the greater size of the area of RPE atrophy compared to CC atrophy. Further investigations based on OCTA imaging are necessary to enhance our knowledge of this rare disease.
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Affiliation(s)
| | - Alessandro Arrigo
- Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | | | - Lorenzo Bianco
- Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Alessio Antropoli
- Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Angela Malegori
- Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesco Bandello
- Department of Ophthalmology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Fausto Tranfa
- Department of Ophthalmology, Federico II University, Napoli, Italy
| | - Ciro Costagliola
- Department of Ophthalmology, Federico II University, Napoli, Italy
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7
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A patient advocating for transparent science in rare disease research. Orphanet J Rare Dis 2023; 18:14. [PMID: 36658594 PMCID: PMC9854194 DOI: 10.1186/s13023-022-02557-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 06/14/2022] [Accepted: 10/12/2022] [Indexed: 01/20/2023] Open
Abstract
300 million people live with at least one of 6,000 rare diseases worldwide. However, rare disease research is not always reviewed with scrutiny, making it susceptible to what the author refers to as nontransparent science. Nontransparent science can obscure animal model flaws, misguide medicine regulators and drug developers, delay or frustrate orphan drug development, or waste limited resources for rare disease research. Flawed animal models not only lack pharmacologic relevance, but also give rise to issue of clinical translatability. Sadly, these consequences and risks are grossly overlooked. Nontransparency in science can take many forms, such as premature publication of animal models without clinically significant data, not providing corrections when flaws to the model are discovered, lack of warning of critical study limitations, missing critical control data, questionable data quality, surprising results without a sound explanation, failure to rule out potential factors which may affect study conclusions, lack of sufficient detail for others to replicate the study, dubious authorship and study accountability. Science has no boarders, neither does nontransparent science. Nontransparent science can happen irrespective of the researcher's senority, institutional affiliation or country. As a patient-turned researcher suffering from Bietti crystalline dystrophy (BCD), I use BCD as an example to analyze various forms of nontransparent science in rare disease research. This article analyzes three papers published by different research groups on Cyp4v3-/-, high-fat diet (HFD)-Cyp4v3-/-, and Exon1-Cyp4v3-/- mouse models of BCD. As the discussion probes various forms of nontransparent science, the flaws of these knockout mouse models are uncovered. These mouse models do not mimic BCD in humans nor do they address the lack of Cyp4v3 (murine ortholog of human CYP4V2) expression in wild type (WT) mouse retina which is markedly different from CYP4V2 expression in human retina. Further, this article discusses the impact of nontransparent science on drug development which can lead to significant delays ultimately affecting the patients. Lessons from BCD research can be helpful to all those suffering from rare diseases. As a patient, I call for transparent science in rare disease research.
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8
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Jia R, Meng X, Chen S, Zhang F, Du J, Liu X, Yang L. AAV-mediated gene-replacement therapy restores viability of BCD patient iPSC derived RPE cells and vision of Cyp4v3 knockout mice. Hum Mol Genet 2023; 32:122-138. [PMID: 35925866 DOI: 10.1093/hmg/ddac181] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/17/2022] [Accepted: 07/31/2022] [Indexed: 01/25/2023] Open
Abstract
Bietti crystalline corneoretinal dystrophy (BCD) is an autosomal recessive retinal degenerative disease characterized by yellow-white crystal deposits in the posterior pole, degeneration of the retinal pigment epithelium (RPE), and sclerosis of the choroid. Mutations in the cytochrome P450 4V2 gene (CYP4V2) cause BCD, which is associated with lipid metabolic disruption. The use of gene-replacement therapy in BCD has been hampered by the lack of disease models. To advance CYP4V2 gene-replacement therapy, we generated BCD patient-specific induced pluripotent stem cell (iPSC)-RPE cells and Cyp4v3 knockout (KO) mice as disease models and AAV2/8-CAG-CYP4V2 as treatment vectors. We demonstrated that after adeno-associated virus (AAV)-mediated CYP4V2 gene-replacement therapy BCD-iPSC-RPE cells presented restored cell survival and reduced lipid droplets accumulation; restoration of vision in Cyp4v3 KO mice was revealed by elevated electroretinogram amplitude and ameliorated RPE degeneration. These results suggest that AAV-mediated gene-replacement therapy in BCD patients is a promising strategy.
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Affiliation(s)
- Ruixuan Jia
- Key Laboratory of Vision Loss and Restoration, Department of Ophthalmology, Ministry of Education, Peking University Third Hospital, Beijing, People's Republic of China
| | - Xiang Meng
- Key Laboratory of Vision Loss and Restoration, Department of Ophthalmology, Ministry of Education, Peking University Third Hospital, Beijing, People's Republic of China
| | - Shaohong Chen
- Beijing Chinagene Corporation Ltd, Beijing, People's Republic of China
| | - Fan Zhang
- Beijing Chinagene Corporation Ltd, Beijing, People's Republic of China
| | - Juan Du
- Key Laboratory of Vision Loss and Restoration, Department of Ophthalmology, Ministry of Education, Peking University Third Hospital, Beijing, People's Republic of China.,Department of Anatomy, Histology, and Embryology, Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center, Beijing, People's Republic of China
| | - Xiaozhen Liu
- Key Laboratory of Vision Loss and Restoration, Department of Ophthalmology, Ministry of Education, Peking University Third Hospital, Beijing, People's Republic of China
| | - Liping Yang
- Key Laboratory of Vision Loss and Restoration, Department of Ophthalmology, Ministry of Education, Peking University Third Hospital, Beijing, People's Republic of China
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9
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Saatci AO, Ataş F, Çetin GO, Kayabaşı M. Diagnostic and Management Strategies of Bietti Crystalline Dystrophy: Current Perspectives. Clin Ophthalmol 2023; 17:953-967. [PMID: 36998515 PMCID: PMC10046287 DOI: 10.2147/opth.s388292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/15/2023] [Indexed: 04/01/2023] Open
Abstract
Bietti crystalline dystrophy (BCD) is a rare, genetically determined chorioretinal dystrophy presenting with intraretinal crystalline deposits and varying degrees of progressive chorioretinal atrophy commencing at the posterior pole. In some cases, there can be concomitant corneal crystals noted first in the superior or inferior limbus. CYP4V2 gene, a member of the cytochrome P450 family is responsible for the disease and more than 100 mutations have been defined thus far. However, a genotype-phenotype correlation has not been established yet. Visual impairment commonly occurs between the second and third decades of life. By the fifth or sixth decade of life, vision loss can become so severe that the patient may potentially become legally blind. Multitudes of multimodal imaging modalities can be utilized to demonstrate the clinical features, course, and complications of the disease. This present review aims to reiterate the clinical features of BCD, update the clinical perspectives with the help of multimodal imaging techniques, and overview its genetic background with future therapeutic approaches.
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Affiliation(s)
- Ali Osman Saatci
- Department of Ophthalmology, Dokuz Eylul University, Izmir, Turkey
- Correspondence: Ali Osman Saatci, Department of Ophthalmology, Dokuz Eylul University, Mustafa Kemal Sahil Bulvari, No: 73 A Blok, Daire 9, Narlidere, Izmir, Turkey, Tel +90 5327437071, Email
| | - Ferdane Ataş
- Department of Ophthalmology, Çerkezköy State Hospital, Tekirdağ, Turkey
| | - Gökhan Ozan Çetin
- Department of Medical Genetics, Pamukkale University, Denizli, Turkey
| | - Mustafa Kayabaşı
- Department of Ophthalmology, Dokuz Eylul University, Izmir, Turkey
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10
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Li M, Gao L, Zhao L, Zou T, Xu H. Toward the next generation of vascularized human neural organoids. Med Res Rev 2023; 43:31-54. [PMID: 35993813 DOI: 10.1002/med.21922] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 02/22/2022] [Accepted: 08/09/2022] [Indexed: 02/04/2023]
Abstract
Thanks to progress in the development of three-dimensional (3D) culture technologies, human central nervous system (CNS) development and diseases have been gradually deciphered by using organoids derived from human embryonic stem cells (hESCs) or human induced pluripotent stem cells (hiPSCs). Selforganized neural organoids (NOs) have been used to mimic morphogenesis and functions of specific organs in vitro. Many NOs have been reproduced in vitro, such as those mimicking the human brain, retina, and spinal cord. However, NOs fail to capitulate to the maturation and complexity of in vivo neural tissues. The persistent issues with current NO cultivation protocols are inadequate oxygen supply and nutrient diffusion due to the absence of vascular networks. In vivo, the developing CNS is interpenetrated by vasculature that not only supplies oxygen and nutrients but also provides a structural template for neuronal growth. To address these deficiencies, recent studies have begun to couple NO culture with bioengineering techniques and methodologies, including genetic engineering, coculture, multidifferentiation, microfluidics and 3D bioprinting, and transplantation, which might promote NO maturation and create more functional NOs. These cutting-edge methods could generate an ever more reliable NO model in vitro for deciphering the codes of human CNS development, disease progression, and translational application. In this review, we will summarize recent technological advances in culture strategies to generate vascularized NOs (vNOs), with a special focus on cerebral- and retinal-organoid models.
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Affiliation(s)
- Minghui Li
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Lixiong Gao
- Department of Ophthalmology, Third Medical Center of PLA General Hospital, Beijing, China
| | - Ling Zhao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ting Zou
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Haiwei Xu
- Southwest Hospital/Southwest Eye Hospital, Third Military Medical University (Army Medical University), Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
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11
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Noh SE, Lee SJ, Lee TG, Park KS, Kim JH. Inhibition of Cellular Senescence Hallmarks by Mitochondrial Transplantation in Senescence-induced ARPE-19 cells. Neurobiol Aging 2022; 121:157-165. [DOI: 10.1016/j.neurobiolaging.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 10/03/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
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12
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A Bietti Crystalline Dystrophy Mouse Model Shows Increased Sensitivity to Light-Induced Injury. Int J Mol Sci 2022; 23:ijms232113108. [DOI: 10.3390/ijms232113108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/24/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022] Open
Abstract
Bietti crystalline corneo-retinal dystrophy (BCD) is an autosomal recessive inherited retinal dystrophy characterized by multiple shimmering yellow-white deposits in the posterior pole of the retina in association with atrophy of the retinal pigment epithelium (RPE), pigment clumps, and choroidal atrophy and sclerosis. Blindness and severe visual damage are common in late-stage BCD patients. We generated a Cyp4v3 knockout mouse model to investigate the pathogenesis of BCD. This model exhibits decreased RPE numbers and signs of inflammation response in the retina. Rod photoreceptors were vulnerable to light-induced injury, showing increased deposits through fundoscopy, a decrease in thickness and a loss of cells in the ONL, and the degeneration of rod photoreceptors. These results suggest that an inflammatory response might be an integral part of the pathophysiology of BCD, suggesting that it might be reasonable for BCD patients to avoid strong light, and the results provide a useful model for evaluating the effects of therapeutic approaches.
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13
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Jenny LA, Liu PK, Kolesnikova M, Duong J, Kim AH, Levi SR, Greenstein VC, Tsang SH. Foveolar thickness as potential standardized structural outcome measurement in studies of Bietti crystalline dystrophy. Sci Rep 2022; 12:14706. [PMID: 36038562 PMCID: PMC9424222 DOI: 10.1038/s41598-022-16563-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022] Open
Abstract
Bietti crystalline dystrophy (BCD) is an ultra-rare orphan disorder that can lead to blindness. Because of the variable rates of progression of the disease, it is necessary to identify suitable outcome measurements for tracking progression in BCD. A retrospective analysis of patients with a clinical and genetic diagnosis of BCD was conducted. Four measurements of spectral domain-optical coherence tomography were compared to patients’ best corrected visual acuity. We observed that patients with higher measurements of foveolar thickness, choroidal thickness in the foveolar region, ellipsoid zone band length and the outer nuclear layer + area, had on average better visual acuity. Future studies are needed to validate the structural–functional correlations we observed in BCD and to propose a sensitive and clinically meaningful outcome measurement for tracking this rare, variable disease.
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Affiliation(s)
- Laura A Jenny
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA.,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA
| | - Pei-Kang Liu
- Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA.,Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Masha Kolesnikova
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA.,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA
| | - Jimmy Duong
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA
| | - Angela H Kim
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA.,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA
| | - Sarah R Levi
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA.,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA
| | | | - Stephen H Tsang
- Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY, USA. .,Jonas Children's Vision Care and Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, New York, NY, USA. .,Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, USA. .,Institute of Human Nutrition, Columbia University, New York, NY, USA. .,Columbia University Stem Cell Initiative, New York, NY, USA.
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14
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Wang JH, Lidgerwood GE, Daniszewski M, Hu ML, Roberts GE, Wong RCB, Hung SSC, McClements ME, Hewitt AW, Pébay A, Hickey DG, Edwards TL. AAV2-mediated gene therapy for Bietti crystalline dystrophy provides functional CYP4V2 in multiple relevant cell models. Sci Rep 2022; 12:9525. [PMID: 35680963 PMCID: PMC9184470 DOI: 10.1038/s41598-022-12210-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/06/2022] [Indexed: 12/23/2022] Open
Abstract
Bietti crystalline dystrophy (BCD) is an inherited retinal disease (IRD) caused by mutations in the CYP4V2 gene. It is a relatively common cause of IRD in east Asia. A number of features of this disease make it highly amenable to gene supplementation therapy. This study aims to validate a series of essential precursor in vitro experiments prior to developing a clinical gene therapy for BCD. We demonstrated that HEK293, ARPE19, and patient induced pluripotent stem cell (iPSC)-derived RPE cells transduced with AAV2 vectors encoding codon optimization of CYP4V2 (AAV2.coCYP4V2) resulted in elevated protein expression levels of CYP4V2 compared to those transduced with AAV2 vectors encoding wild type CYP4V2 (AAV2.wtCYP4V2), as assessed by immunocytochemistry and western blot. Similarly, we observed significantly increased CYP4V2 enzyme activity in cells transduced with AAV2.coCYP4V2 compared to those transduced with AAV2.wtCYP4V2. We also showed CYP4V2 expression in human RPE/choroid explants transduced with AAV2.coCYP4V2 compared to those transduced with AAV2.wtCYP4V2. These preclinical data support the further development of a gene supplementation therapy for a currently untreatable blinding condition—BCD. Codon-optimized CYP4V2 transgene was superior to wild type in terms of protein expression and enzyme activity. Ex vivo culture of human RPE cells provided an effective approach to test AAV-mediated transgene delivery.
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Affiliation(s)
- Jiang-Hui Wang
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia
| | - Grace E Lidgerwood
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia.,Department of Anatomy and Physiology, The University of Melbourne, Parkville, Australia
| | - Maciej Daniszewski
- Department of Anatomy and Physiology, The University of Melbourne, Parkville, Australia
| | - Monica L Hu
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia
| | - Georgina E Roberts
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia
| | - Raymond C B Wong
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, East Melbourne, VIC, Australia.,Shenzhen Eye Hospital, Shenzhen University School of Medicine, Shenzhen, China
| | - Sandy S C Hung
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, East Melbourne, VIC, Australia
| | - Michelle E McClements
- Department of Clinical Neurosciences, Nuffield Laboratory of Ophthalmology, University of Oxford, Oxford, UK
| | - Alex W Hewitt
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, East Melbourne, VIC, Australia.,Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Alice Pébay
- Department of Anatomy and Physiology, The University of Melbourne, Parkville, Australia.,Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Parkville, Australia
| | - Doron G Hickey
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia
| | - Thomas L Edwards
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3002, Australia. .,Ophthalmology, Department of Surgery, The University of Melbourne, East Melbourne, VIC, Australia.
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15
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Gao P, Jia D, Li P, Huang Y, Hu H, Sun K, Lv Y, Chen X, Han Y, Zhang Z, Ren X, Wang Q, Liu F, Tang Z, Liu M. Accumulation of Lipid Droplets in a Novel Bietti Crystalline Dystrophy Zebrafish Model With Impaired PPARα Pathway. Invest Ophthalmol Vis Sci 2022; 63:32. [PMID: 35616930 PMCID: PMC9150832 DOI: 10.1167/iovs.63.5.32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Bietti crystalline dystrophy (BCD) is a progressive retinal degenerative disease primarily characterized by numerous crystal-like deposits and degeneration of retinal pigment epithelium (RPE) and photoreceptor cells. CYP4V2 (cytochrome P450 family 4 subfamily V member 2) is currently the only disease-causing gene for BCD. We aimed to generate a zebrafish model to explore the functional role of CYP4V2 in the development of BCD and identify potential therapeutic targets for future studies. Methods The cyp4v7 and cyp4v8 (homologous genes of CYP4V2) knockout zebrafish lines were generated by CRISPR/Cas9 technology. The morphology of photoreceptor and RPE cells and the accumulation of lipid droplets in RPE cells were investigated at a series of different developmental stages through histological analysis, immunofluorescence, and lipid staining. Transcriptome analysis was performed to investigate the changes in gene expression of RPE cells during the progression of BCD. Results Progressive retinal degeneration including RPE atrophy and photoreceptor loss was observed in the mutant zebrafish as early as seven months after fertilization. We also observed the excessive accumulation of lipid droplets in RPE cells from three months after fertilization, which preceded the retinal degeneration by several months. Transcriptome analysis suggested that multiple metabolism pathways, especially the lipid metabolism pathways, were significantly changed in RPE cells. The down-regulation of the peroxisome proliferator-activated receptor α (PPARα) pathway was further confirmed in the mutant zebrafish and CYP4V2-knockdown human RPE-1 cells. Conclusions Our work established an animal model that recapitulates the symptoms of BCD patients and revealed that abnormal lipid metabolism in RPE cells, probably caused by dysregulation of the PPARα pathway, might be the main and direct consequence of CYP4V2 deficiency. These findings will deepen our understanding of the pathogenesis of BCD and provide potential therapeutic approaches.
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Affiliation(s)
- Pan Gao
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Danna Jia
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Pei Li
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yuwen Huang
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Hualei Hu
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Kui Sun
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yuexia Lv
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Xiang Chen
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Yunqiao Han
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Zuxiao Zhang
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Xiang Ren
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Qing Wang
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Fei Liu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Innovative Academy of Seed Design, Hubei Hongshan Laboratory, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zhaohui Tang
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Mugen Liu
- Key Laboratory of Molecular Biophysics of Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
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16
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Tandem Mass Tagging-Based Quantitative Proteomics Analysis Reveals Damage to the Liver and Brain of Hypophthalmichthys molitrix Exposed to Acute Hypoxia and Reoxygenation. Antioxidants (Basel) 2022; 11:antiox11030589. [PMID: 35326239 PMCID: PMC8945220 DOI: 10.3390/antiox11030589] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 03/15/2022] [Accepted: 03/18/2022] [Indexed: 12/13/2022] Open
Abstract
Aquaculture environments frequently experience hypoxia and subsequent reoxygenation conditions, which have significant effects on hypoxia-sensitive fish populations. In this study, hepatic biochemical activity indices in serum and the content of major neurotransmitters in the brain were altered markedly after acute hypoxia and reoxygenation exposure in silver carp (Hypophthalmichthys molitrix). Proteomics analysis of the liver showed that a number of immune-related and cytoskeletal organization-related proteins were downregulated, the ferroptosis pathway was activated, and several antioxidant molecules and detoxifying enzymes were upregulated. Proteomics analysis of the brain showed that somatostatin-1A (SST1A) was upregulated, dopamine-degrading enzyme catechol O methyltransferase (COMT) and ferritin, heavy subunit (FerH) were downregulated, and the levels of proteins involved in the nervous system were changed in different ways. In conclusion, these findings highlight that hypoxia–reoxygenation has potential adverse effects on growth, locomotion, immunity, and reproduction of silver carp, and represents a serious threat to liver and brain function, possibly via ferroptosis, oxidative stress, and cytoskeleton destruction in the liver, and abnormal expression of susceptibility genes for neurodegenerative disorders in the brain. Our present findings provide clues to the mechanisms of hypoxia and reoxygenation damage in the brain and liver of hypoxia-sensitive fish. They could also be used to develop methods to reduce hypoxia or reoxygenation injury to fish.
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17
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Regulatory Effects of Astragaloside IV on Hyperglycemia-Induced Mitophagy in Schwann Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:7864308. [PMID: 35069769 PMCID: PMC8767404 DOI: 10.1155/2022/7864308] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/04/2021] [Accepted: 12/16/2021] [Indexed: 01/17/2023]
Abstract
OBJECTIVE This study aimed to observe the regulatory effects of astragaloside IV (AS-IV) on hyperglycemia-induced mitochondrial damage and mitophagy in Schwann cells and to provide references for clinical trials on AS-IV in the treatment of diabetic peripheral neuropathy. METHODS Schwann cells were grown in a high-glucose medium to construct an autophagy model; the cells were then treated with AS-IV and N-acetylcysteine (control) to observe the regulatory effects of AS-IV on oxidative stress and mitophagy. RESULTS AS-IV exhibited antioxidant activity and inhibited the overactivation of autophagy in Schwann cells, significantly reducing the level of reactive oxygen species and downregulating the expression of autophagy-related proteins (LC3, PINK, and Parkin) under hyperglycemic conditions, thereby exerting a protective effect on mitochondrial morphology and membrane potential. CONCLUSION AS-IV can maintain the mitochondrial function of Schwann cells under hyperglycemic conditions by effectively alleviating oxidative stress and overactivation of mitophagy. The evidence from this study supports an AS-IV-based therapeutic strategy against diabetic peripheral neuropathy.
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18
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Marco-Hernández AV, Tomás-Vila M, Montoya-Filardi A, Barranco-González H, Vilchez Padilla JJ, Azorín I, Smeyers Dura P, Monfort-Membrado S, Pitarch-Castellano I, Martínez-Castellano F. Mitochondrial developmental encephalopathy with bilateral optic neuropathy related to homozygous variants in IMMT gene. Clin Genet 2021; 101:233-241. [PMID: 34842280 DOI: 10.1111/cge.14093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 12/14/2022]
Abstract
IMMT gene codes for mitofilin, a mitochondrial inner membrane protein that regulates the morphology of mitochondrial cristae. The phenotype associated with mutations in this gene has not been yet established, but functional studies carried out show that its loss causes a mitochondrial alteration, both in the morphology of the mitochondrial crests and in their function. We present two cousins from an extended highly consanguineous family with developmental encephalopathy, hypotonia, nystagmus due to optic neuropathy. The likely pathogenic homozygous c.895A>G (p.Lys299Glu) variant in the IMMT gene co-segregates with the disease and associates altered mitochondrial cristae observed by electron microscopy.
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Affiliation(s)
- Ana Victoria Marco-Hernández
- Genomics Unit, La Fe Health Research Institute, Valencia, Spain.,Genetics Unit, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | - Miguel Tomás-Vila
- Neuropediatrics Section, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | | | | | - Juan Jesus Vilchez Padilla
- Neuromuscular Pathology Laboratory, Health Research Institute La Fe; CIBERER. European Reference for rare Neuromuscular Diseases, Valencia, Spain
| | - Inmaculada Azorín
- Neuromuscular Pathology Laboratory, Health Research Institute La Fe; CIBERER. European Reference for rare Neuromuscular Diseases, Valencia, Spain
| | | | | | | | - Francisco Martínez-Castellano
- Genomics Unit, La Fe Health Research Institute, Valencia, Spain.,Genetics Unit, Hospital Universitari i Politècnic La Fe, Valencia, Spain
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19
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Osborne N, Leahy C, Lee YK, Rote P, Song BJ, Hardwick JP. CYP4V2 fatty acid omega hydroxylase, a druggable target for the treatment of metabolic associated fatty liver disease (MAFLD). Biochem Pharmacol 2021; 195:114841. [PMID: 34798124 DOI: 10.1016/j.bcp.2021.114841] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/10/2021] [Accepted: 11/13/2021] [Indexed: 12/30/2022]
Abstract
Fatty acids are essential in maintaining cellular homeostasis by providing lipids for energy production, cell membrane integrity, protein modification, and the structural demands of proliferating cells. Fatty acids and their derivatives are critical bioactive signaling molecules that influence many cellular processes, including metabolism, cell survival, proliferation, migration, angiogenesis, and cell barrier function. The CYP4 Omega hydroxylase gene family hydroxylate various short, medium, long, and very-long-chain saturated, unsaturated and polyunsaturated fatty acids. Selective members of the CYP4 family metabolize vitamins and biochemicals with long alkyl side chains and bioactive prostaglandins, leukotrienes, and arachidonic acids. It is uncertain of the physiological role of different members of the CYP4 omega hydroxylase gene family in the metabolic control of physiological and pathological processes in the liver. CYP4V2 is a unique member of the CYP4 family. CYP4V2 inactivation in retinal pigment epithelial cells leads to cholesterol accumulation and Bietti's Crystalline Dystrophy (BCD) pathogenesis. This commentary provides information on the role CYP4V2 has in metabolic syndrome and nonalcoholic fatty liver disease progression. This is accomplished by identifying its role in BCD, its control of cholesterol synthesis and lipid droplet formation in C. elegans, and the putative function in cardiovascular disease and gastrointestinal/hepatic pathologies.
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Affiliation(s)
- Nicholas Osborne
- Northeast Ohio Medical Universities, Department of Integrative Medical Sciences, Rootstown, OH 44272, United States
| | - Charles Leahy
- Northeast Ohio Medical Universities, Department of Integrative Medical Sciences, Rootstown, OH 44272, United States
| | - Yoon-Kwang Lee
- Northeast Ohio Medical Universities, Department of Integrative Medical Sciences, Rootstown, OH 44272, United States
| | - Paula Rote
- Internal Medicine University of Minnesota Health Care System, Minneapolis, MN 55455, United States
| | - Byoung-Joon Song
- Section of Molecular Pharmacology and Toxicology, Laboratory of Membrane Biochemistry and Biophysics, 5625 Fishers Lane Room 3N-01, MSC 9410, Bethesda, MD 20892, United States
| | - James P Hardwick
- Northeast Ohio Medical Universities, Department of Integrative Medical Sciences, Rootstown, OH 44272, United States
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20
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Wu S, Lam SM, Li H, Jiang B, Sun Z, Zhu T, Wei X, Zou X, Shui G, Sui R. Targeted lipidomics reveals plasmalogen phosphatidylethanolamines and storage triacylglycerols as the major systemic lipid aberrations in Bietti crystalline corneoretinal dystrophy. J Genet Genomics 2021; 49:380-383. [PMID: 34710622 DOI: 10.1016/j.jgg.2021.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 11/15/2022]
Affiliation(s)
- Shijing Wu
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Sin Man Lam
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Huajin Li
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China; Department of Ophthalmology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350004, China
| | - Binhua Jiang
- LipidALL Technologies Company Limited, Changzhou, Jiangsu 213022, China
| | - Zixi Sun
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Tian Zhu
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xing Wei
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Xuan Zou
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Guanghou Shui
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ruifang Sui
- Department of Ophthalmology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
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21
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Riecan M, Paluchova V, Lopes M, Brejchova K, Kuda O. Branched and linear fatty acid esters of hydroxy fatty acids (FAHFA) relevant to human health. Pharmacol Ther 2021; 231:107972. [PMID: 34453998 DOI: 10.1016/j.pharmthera.2021.107972] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/23/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022]
Abstract
Fatty acid esters of hydroxy fatty acids (FAHFAs) represent a complex lipid class that contains both signaling mediators and structural components of lipid biofilms in humans. The majority of endogenous FAHFAs share a common chemical architecture, characterized by an estolide bond that links the hydroxy fatty acid (HFA) backbone and the fatty acid (FA). Two structurally and functionally distinct FAHFA superfamilies are recognized based on the position of the estolide bond: omega-FAHFAs and in-chain branched FAHFAs. The existing variety of possible HFAs and FAs combined with the position of the estolide bond generates a vast quantity of unique structures identified in FAHFA families. In this review, we discuss the anti-diabetic and anti-inflammatory effects of branched FAHFAs and the role of omega-FAHFA-derived lipids as surfactants in the tear film lipid layer and dry eye disease. To emphasize potential pharmacological targets, we recapitulate the biosynthesis of the HFA backbone within the superfamilies together with the degradation pathways and the FAHFA regioisomer distribution in human and mouse adipose tissue. We propose a theoretical involvement of cytochrome P450 enzymes in the generation and degradation of saturated HFA backbones and present an overview of small-molecule inhibitors used in FAHFA research. The FAHFA lipid class is huge and largely unexplored. Besides the unknown biological effects of individual FAHFAs, also the enigmatic enzymatic machinery behind their synthesis could provide new therapeutic approaches for inflammatory metabolic or eye diseases. Therefore, understanding the mechanisms of (FA)HFA synthesis at the molecular level should be the next step in FAHFA research.
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Affiliation(s)
- Martin Riecan
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague 4, Czech Republic
| | - Veronika Paluchova
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague 4, Czech Republic
| | - Magno Lopes
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague 4, Czech Republic
| | - Kristyna Brejchova
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague 4, Czech Republic
| | - Ondrej Kuda
- Institute of Physiology, Czech Academy of Sciences, 14220 Prague 4, Czech Republic.
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22
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Mirra S, García-Arroyo R, B Domènech E, Gavaldà-Navarro A, Herrera-Úbeda C, Oliva C, Garcia-Fernàndez J, Artuch R, Villarroya F, Marfany G. CERKL, a retinal dystrophy gene, regulates mitochondrial function and dynamics in the mammalian retina. Neurobiol Dis 2021; 156:105405. [PMID: 34048907 DOI: 10.1016/j.nbd.2021.105405] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/06/2021] [Accepted: 05/21/2021] [Indexed: 11/30/2022] Open
Abstract
The retina is a highly active metabolic organ that displays a particular vulnerability to genetic and environmental factors causing stress and homeostatic imbalance. Mitochondria constitute a bioenergetic hub that coordinates stress response and cellular homeostasis, therefore structural and functional regulation of the mitochondrial dynamic network is essential for the mammalian retina. CERKL (ceramide kinase like) is a retinal degeneration gene whose mutations cause Retinitis Pigmentosa in humans, a visual disorder characterized by photoreceptors neurodegeneration and progressive vision loss. CERKL produces multiple isoforms with a dynamic subcellular localization. Here we show that a pool of CERKL isoforms localizes at mitochondria in mouse retinal ganglion cells. The depletion of CERKL levels in CerklKD/KO(knockdown/knockout) mouse retinas cause increase of autophagy, mitochondrial fragmentation, alteration of mitochondrial distribution, and dysfunction of mitochondrial-dependent bioenergetics and metabolism. Our results support CERKL as a regulator of autophagy and mitochondrial biology in the mammalian retina.
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Affiliation(s)
- Serena Mirra
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona- Institut de Recerca Hospital Sant Joan de Déu, IBUB-IRSJD, Barcelona, Spain.
| | - Rocío García-Arroyo
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Elena B Domènech
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain
| | - Aleix Gavaldà-Navarro
- Institut de Biomedicina de la Universitat de Barcelona- Institut de Recerca Hospital Sant Joan de Déu, IBUB-IRSJD, Barcelona, Spain; Department of Biochemistry and Molecular Biomedicine, Barcelona, Spain; CIBEROBN, Instituto de Salud Carlos III, Spain
| | - Carlos Herrera-Úbeda
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Clara Oliva
- Clinical Biochemistry Department, Hospital Sant Joan de Déu, Spain
| | - Jordi Garcia-Fernàndez
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Rafael Artuch
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain; Clinical Biochemistry Department, Hospital Sant Joan de Déu, Spain
| | - Francesc Villarroya
- Institut de Biomedicina de la Universitat de Barcelona- Institut de Recerca Hospital Sant Joan de Déu, IBUB-IRSJD, Barcelona, Spain; Department of Biochemistry and Molecular Biomedicine, Barcelona, Spain; CIBEROBN, Instituto de Salud Carlos III, Spain
| | - Gemma Marfany
- Department of Genetics, Microbiology and Statistics and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Barcelona, Spain; Institut de Biomedicina de la Universitat de Barcelona- Institut de Recerca Hospital Sant Joan de Déu, IBUB-IRSJD, Barcelona, Spain.
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23
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Koh AEH, Subbiah SK, Farhana A, Alam MK, Mok PL. Mitigation of Sodium Iodate-Induced Cytotoxicity in Retinal Pigment Epithelial Cells in vitro by Transgenic Erythropoietin-Expressing Mesenchymal Stem Cells. Front Cell Dev Biol 2021; 9:652065. [PMID: 33937251 PMCID: PMC8082501 DOI: 10.3389/fcell.2021.652065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/15/2021] [Indexed: 12/20/2022] Open
Abstract
Mesenchymal stem cells (MSC) have shown promise in restoring the vision of patients in clinical trials. However, this therapeutic effect is not observed in every treated patient and is possibly due to the inefficacies of cell delivery and high cell death following transplantation. Utilizing erythropoietin can significantly enhance the regenerative properties of MSCs and hence improve retinal neuron survivability in oxidative stress. Hence, this study aimed to investigate the efficacy of conditioned medium (CM) obtained from transgenic human erythropoietin-expressing MSCs (MSC EPO ) in protecting human retinal pigment epithelial cells from sodium iodate (NaIO3)-induced cell death. Human MSC and MSC EPO were first cultured to obtain conditioned media (CM). The IC50 of NaIO3 in the ARPE-19 culture was then determined by an MTT assay. After that, the efficacy of both MSC-CM and MSC-CM EPO in ARPE-19 cell survival were compared at 24 and 48 h after NaIO3 treatment with MTT. The treatment effects on mitochondrial membrane potential was then measured by a JC-1 flow cytometric assay. The MTT results indicated a corresponding increase in cell survivability (5-58%) in the ARPE-19 cell cultures. In comparison to MSC-CM, the use of conditioned medium collected from the MSC-CM EPO further enhanced the rate of ARPE-19 survivability at 24 h (P < 0.05) and 48 h (P < 0.05) in the presence of NaIO3. Furthermore, more than 90% were found viable with the JC-1 assay after MSC-CM EPO treatment, showing a positive implication on the mitochondrial dynamics of ARPE-19. The MSC-CM EPO provided an enhanced mitigating effect against NaIO3-induced ARPE-19 cell death over that of MSC-CM alone during the early phase of the treatment, and it may act as a future therapy in treating retinal degenerative diseases.
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Affiliation(s)
- Avin Ee-Hwan Koh
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Seri Kembangan, Malaysia
| | - Suresh Kumar Subbiah
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, UPM, Seri Kembangan, Malaysia.,Genetics and Regenerative Medicine Research Group, Universiti Putra Malaysia, UPM, Seri Kembangan, Malaysia.,Department of Biotechnology, Bharath Institute of Higher Education and Research, Chennai, India
| | - Aisha Farhana
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, Saudi Arabia
| | | | - Pooi Ling Mok
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, UPM, Seri Kembangan, Malaysia.,Genetics and Regenerative Medicine Research Group, Universiti Putra Malaysia, UPM, Seri Kembangan, Malaysia.,Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, Saudi Arabia
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24
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Adult mesenchymal stem cell ageing interplays with depressed mitochondrial Ndufs6. Cell Death Dis 2020; 11:1075. [PMID: 33323934 PMCID: PMC7738680 DOI: 10.1038/s41419-020-03289-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023]
Abstract
Mesenchymal stem cell (MSC)-based therapy has emerged as a novel strategy to treat many degenerative diseases. Accumulating evidence shows that the function of MSCs declines with age, thus limiting their regenerative capacity. Nonetheless, the underlying mechanisms that control MSC ageing are not well understood. We show that compared with bone marrow-MSCs (BM-MSCs) isolated from young and aged samples, NADH dehydrogenase (ubiquinone) iron-sulfur protein 6 (Ndufs6) is depressed in aged MSCs. Similar to that of Ndufs6 knockout (Ndufs6−/−) mice, MSCs exhibited a reduced self-renewal and differentiation capacity with a tendency to senescence in the presence of an increased p53/p21 level. Downregulation of Ndufs6 by siRNA also accelerated progression of wild-type BM-MSCs to an aged state. In contrast, replenishment of Ndufs6 in Ndufs6−/−-BM-MSCs significantly rejuvenated senescent cells and restored their proliferative ability. Compared with BM-MSCs, Ndufs6−/−-BM-MSCs displayed increased intracellular and mitochondrial reactive oxygen species (ROS), and decreased mitochondrial membrane potential. Treatment of Ndufs6−/−-BM-MSCs with mitochondrial ROS inhibitor Mito-TEMPO notably reversed the cellular senescence and reduced the increased p53/p21 level. We provide direct evidence that impairment of mitochondrial Ndufs6 is a putative accelerator of adult stem cell ageing that is associated with excessive ROS accumulation and upregulation of p53/p21. It also indicates that manipulation of mitochondrial function is critical and can effectively protect adult stem cells against senescence.
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