1
|
Wei H, Gao J, Lin DH, Geng R, Liao J, Huang TY, Shang G, Jing J, Fan ZW, Pan D, Yin ZQ, Li T, Liu X, Zhao S, Chen C, Li J, Wang X, Ding D, Liu MF. piRNA loading triggers MIWI translocation from the intermitochondrial cement to chromatoid body during mouse spermatogenesis. Nat Commun 2024; 15:2343. [PMID: 38491008 PMCID: PMC10943014 DOI: 10.1038/s41467-024-46664-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
The intermitochondrial cement (IMC) and chromatoid body (CB) are posited as central sites for piRNA activity in mice, with MIWI initially assembling in the IMC for piRNA processing before translocating to the CB for functional deployment. The regulatory mechanism underpinning MIWI translocation, however, has remained elusive. We unveil that piRNA loading is the trigger for MIWI translocation from the IMC to CB. Mechanistically, piRNA loading facilitates MIWI release from the IMC by weakening its ties with the mitochondria-anchored TDRKH. This, in turn, enables arginine methylation of MIWI, augmenting its binding affinity for TDRD6 and ensuring its integration within the CB. Notably, loss of piRNA-loading ability causes MIWI entrapment in the IMC and its destabilization in male germ cells, leading to defective spermatogenesis and male infertility in mice. Collectively, our findings establish the critical role of piRNA loading in MIWI translocation during spermatogenesis, offering new insights into piRNA biology in mammals.
Collapse
Affiliation(s)
- Huan Wei
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, Hangzhou 310024; University of Chinese Academy of Sciences, Hangzhou, China
| | - Jie Gao
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Di-Hang Lin
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Ruirong Geng
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Jiaoyang Liao
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Tian-Yu Huang
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Guanyi Shang
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Jiongjie Jing
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Zong-Wei Fan
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, Hangzhou 310024; University of Chinese Academy of Sciences, Hangzhou, China
| | - Duo Pan
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Zi-Qi Yin
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Tianming Li
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Xinyu Liu
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Shuang Zhao
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Chen Chen
- Department of Animal Science, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Jinsong Li
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, Hangzhou 310024; University of Chinese Academy of Sciences, Hangzhou, China
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China
- School of Life Science and Technology, Shanghai Tech University, Shanghai, 201210, China
| | - Xin Wang
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, Hangzhou 310024; University of Chinese Academy of Sciences, Hangzhou, China.
| | - Deqiang Ding
- Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
| | - Mo-Fang Liu
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, Hangzhou 310024; University of Chinese Academy of Sciences, Hangzhou, China.
- New Cornerstone Science Laboratory, State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences; University of Chinese Academy of Sciences, Shanghai, 200031, China.
- School of Life Science and Technology, Shanghai Tech University, Shanghai, 201210, China.
| |
Collapse
|
2
|
Sun X, Yin ZQ, Zheng JX, Dou Y, Zhang Q, Fu Q, Zhang WL, Yi L. [A comparative study of the curative effects between butterfly-shaped flap and propeller flap based on the dorsal branch of digital artery in repairing the wound in volar aspect of finger]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:552-557. [PMID: 37805771 DOI: 10.3760/cma.j.cn501225-20220714-00294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
Objective: To compare the curative effects of butterfly-shaped flap based on the dorsal branch of digital artery (hereinafter referred to as butterfly-shaped flap) and propeller flap based on the dorsal branch of digital artery (hereinafter referred to as propeller flap) in repairing the wound in volar aspect of finger. Methods: A retrospective cohort study was conducted. From August 2018 to April 2022, 16 patients with finger palmar wounds admitted to Ruijin Hospital of Shanghai Jiao Tong University School of Medicine and 7 patients with finger palmar wounds admitted to General Hospital of PLA Central Theater Command met the inclusion criteria, including 14 males and 9 females, aged 25 to 64 years. After debridement or resection of skin benign tumor, the wounds ranged from 0.5 cm×0.5 cm to 1.5 cm×1.5 cm. According to the different rotation axes of flap pedicle during wound repair, the patients were divided into butterfly-shaped flap group (8 cases) and propeller flap group (15 cases), and their wounds were repaired by butterfly-shaped flap (with area of 0.5 cm×0.5 cm-1.5 cm×1.3 cm) or propeller flap (with area of 0.7 cm×0.5 cm-1.5 cm×1.5 cm) , respectively. In propeller flap group, wounds in the donor sites were repaired by full-thickness skin grafts taken from the palms of wrists or the groin. The surgical time, postoperative complications, flap survival, and wound healing time of patients in the two groups were recorded. Data were statistically analyzed with independent sample t test, Mann Whitney U test, or Fisher's exact probability test. Results: The surgical time and postoperative wound healing time of patients in butterfly-shaped flap group ((43±9) min and (13.1±0.8) d, respectively) were both significantly shorter than those in propeller flap group ((87±16) min and (16.7±4.6) d, respectively, with t values of -7.03 and -2.86, respectively, P<0.05). The postoperative flap survival and complications of patients between the two groups were both similar (P>0.05). Conclusions: For repairing the wound in volar aspect of finger, the butterfly-shaped flap has more advantages in comparison with the traditional propeller flap. The butterfly-shaped flap has a short surgical time and fast postoperative recovery, which is worthy of clinical promotion.
Collapse
Affiliation(s)
- X Sun
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Z Q Yin
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - J X Zheng
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Y Dou
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Q Zhang
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Q Fu
- Department of Orthopedics, General Hospital of PLA Central Theater Command, Wuhan 430072, China
| | - W L Zhang
- Department of Hand Surgery, the People's Hospital of Tianjin, Tianjin 300121, China
| | - L Yi
- Department of Burn and Plastic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| |
Collapse
|
3
|
Yin ZQ, Wan Y, Zhu XF. [Clinical features and advances in diagnoses and treatment of dyskeratosis congenita]. Zhonghua Er Ke Za Zhi 2022; 60:366-369. [PMID: 35385949 DOI: 10.3760/cma.j.cn112140-20210909-00772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Z Q Yin
- Pediatric Blood Diseases Center, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Tianjin 300020, China
| | - Y Wan
- Pediatric Blood Diseases Center, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Tianjin 300020, China
| | - X F Zhu
- Pediatric Blood Diseases Center, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Tianjin 300020, China
| |
Collapse
|
4
|
He F, Long FY, Zhang ZQ, Xia RY, Lu Y, Yin ZQ. Intramatricial injection of anti-interleukin-17A antibody for six patients with nail psoriasis. Clin Exp Dermatol 2021; 47:432-433. [PMID: 34510518 DOI: 10.1111/ced.14933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/26/2021] [Accepted: 09/07/2021] [Indexed: 12/01/2022]
Affiliation(s)
- F He
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - F Y Long
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Z Q Zhang
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - R Y Xia
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Y Lu
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Z Q Yin
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| |
Collapse
|
5
|
Li SY, Yin ZQ. [The heritage and development of visual physiology in China in the past 70 years]. Zhonghua Yan Ke Za Zhi 2020; 56:481-488. [PMID: 32842330 DOI: 10.3760/cma.j.cn112142-20200327-00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Vision is the receptive and cognitive process of converting light and pattern signals into nerve impulse signals. The main role of visual physiology is to elucidate the neural mechanism of vision. As an important part of visual physiology, visual electrophysiological examination, like electrocardiogram and electroencephalogram, is used to diagnose diseases through the bioelectrical phenomena generated during the activities of body organs and tissues. Since the founding of the People's Republic of China, remarkable achievements have been made in basic research, translational research and clinical research of visual physiology with more than 70 years of heritage and efforts. But there are still many unknown areas that need further exploration. Looking back at the development history will encourage us to forge ahead and make more contributions to visual physiology in China. Congratulations on the 70th anniversary of the founding of Chinese Journal of Ophthalmology. (Chin J Ophthalmol, 2020, 56: 481-488).
Collapse
Affiliation(s)
- S Y Li
- Department of Ophthalmology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
| | - Z Q Yin
- Department of Ophthalmology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
| |
Collapse
|
6
|
Affiliation(s)
- Z Q Yin
- Department of Dermatology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| |
Collapse
|
7
|
Hu ZD, Yan J, Cai WJ, Zhang D, Guo XX, Yin ZQ, Zhang MF. [One case report of pleomorphic liposarcoma of larynx]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:781-782. [PMID: 29050100 DOI: 10.3760/cma.j.issn.1673-0860.2017.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z D Hu
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| | - J Yan
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| | - W J Cai
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| | - D Zhang
- Department of Otorhinolaryngology Head and Neck Surgery
| | - X X Guo
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| | - Z Q Yin
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| | - M F Zhang
- Department of Pathology, Tinjin First Center Hospital, Tianjin 300192, China
| |
Collapse
|
8
|
Xu J, Song X, Yin ZQ, Cheng AC, Jia RY, Deng YX, Ye KC, Shi CF, Lv C, Zhang W. Antiviral activity and mode of action of extracts from neem seed kernel against duck plague virus in vitro1. Poult Sci 2012; 91:2802-7. [PMID: 23091135 DOI: 10.3382/ps.2012-02468] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Four fractions obtained from alcohol extracts of neem (Azadirachta indica) seed kernel by column chromatography were investigated for antivirus activity against the duck plague virus (DPV) in vitro. Duck embryo fibroblasts (DEF) infected with DPV were treated with the neem seed kernel extracts, and the effect of antivirus was judged by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide colorimetric method assay and direct immunofluorescence assay. The mode of action was tested by the plaque reduction assay. The results showed that fractions 1 to 3 were inactive. The median inhibitory concentration (IC(50)) of fraction 4 was 10.9 μg/mL and inhibited the virus protein expression in the direct immunofluorescence assay. In the plaque reduction assay, fraction 4 could significantly reduce the number of plaques compared with the negative control (P < 0.01) in all modes of action. This study indicated that the fourth fraction obtained from neem seed kernel could improve the viability of infected cells, and reduce the cytopathic effects caused by DPV and the amount of the virus protein expressed in virus-infected cells. The antiviral activity works in the whole process of virus infecting the normal cells.
Collapse
Affiliation(s)
- J Xu
- College of Animal Medicine, Sichuan Agricultural University, Ya'an, People's Republic of China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Yin ZQ, Xu JL, Song GX, Zhou BR, Lu Y, Li X, Luo D. Active skin immunoreactions lead to significant epidermal Langerhans cells reduction in facial malignant and premalignant skin tumours. J Eur Acad Dermatol Venereol 2012; 27:526-7. [PMID: 22540415 DOI: 10.1111/j.1468-3083.2012.04557.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Yin ZQ, Lu Y, Zhou BR, Guo Z, Luo D. Effects of topical tacrolimus 0.03% on long-term suberythemal ultraviolet B-irradiated epidermal Langerhans cells in mice. J Eur Acad Dermatol Venereol 2012; 27:521-3. [PMID: 22471949 DOI: 10.1111/j.1468-3083.2012.04540.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Li ZZ, Wang JM, Peng XQ, Ho LT, Yin ZQ, Li SY, Cheung CF. Removal of single point diamond-turning marks by abrasive jet polishing. Appl Opt 2011; 50:2458-2463. [PMID: 21629327 DOI: 10.1364/ao.50.002458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Single point diamond turning (SPDT) is highly controllable and versatile in producing axially symmetric forms, non-axially-symmetric forms, microstructured surfaces, and free forms. However, the fine SPDT marks left in the surface limit its performance, and they are difficult to reduce or eliminate. It is unpractical for traditional methods to remove the fine marks without destroying their forms, especially for the aspheres and free forms. This paper introduces abrasive jet polishing (AJP) for the posttreatment of diamond-turned surfaces to remove the periodic microstructures. Samples of diamond-turned electroless nickel plated plano mirror were used in the experiments. One sample with an original surface roughness of more than 400 nm decreased to 4 nm after two iterations abrasive jet polishing; the surface roughness of another sample went from 3.7 nm to 1.4 nm after polishing. The periodic signatures on both of the samples were removed entirely after polishing. Contrastive experimental research was carried out on electroless nickel mirror with magnetorheological finishing, computer controlled optical surfacing, and AJP. The experimental results indicate that AJP is more appropriate in removing the periodic SPDT marks. Also, a figure maintaining experiment was carried out with the AJP process; the uniform polishing process shows that the AJP process can remove the periodic turning marks without destroying the original form.
Collapse
Affiliation(s)
- Z Z Li
- National University of Defense Technology, DeYa, Changsha, Hunan Province, China.
| | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
Serious injury to the optic nerve, including direct and indirect events, induces significant visual loss and even blindness. For the past decade corticosteroids and/or optic canal decompression surgery have been widely embraced therapeutic paradigms for the treatment of traumatic optic neuropathy. There is little clinical evidence, however, to support the effectiveness of these strategies, raising questions about the efficiency of current therapy for improving visual outcomes. Recently, experimental studies have yielded a wealth of information related to the protection and regeneration of retinal ganglion cells, showing promise for the development of novel and effective treatments for optic nerve injury.
Collapse
Affiliation(s)
- N Wu
- Department of Ophthalmology, Southwest Eye Hospital, Southwest Hospital, Third Military Medical University, Chongqing, China
| | | | | |
Collapse
|
13
|
Zhao HS, Chen SJ, Wu N, Wang XQ, Yin ZQ, Wang Y. LEDGFp52 controls rat retinal ganglion cell neurite growth in culture and regulates specific neuronal growth-associated genes and protein production. J Int Med Res 2008; 36:815-29. [PMID: 18652779 DOI: 10.1177/147323000803600425] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We investigated the regulation of primary neurite growth and expression of specific growth-associated genes by lens epithelium-derived growth factor (LEDGF) in rat retinal ganglion cells (RGCs). A pAd-LEDGFp52 adenovirus vector and a siRNA-LEDGFp52 eucaryotic expression vector were transfected into cultured RGCs. Transfection with pAd-LEDGFp52 significantly increased the number of neurites and their lengths compared with untransfected control RGCs. The expression of growth associated protein 43 (GAP43), microtubule-associated protein 2 (MAP2), and low-molecular-weight neurofilament (NF-L) genes and proteins were also significantly up-regulated. In contrast, the introduction of siRNA-LEDGFp52 significantly decreased the number and length of neurites, and significantly down-regulated the expression GAP43, NF-L and MAP2 genes and proteins compared with controls. Our findings suggest that LEDGFp52 might act as a dendritic arborization gene as well as an axonal elongation gene in RGCs and that it might be beneficial to the functional recovery of regenerating RGCs.
Collapse
Affiliation(s)
- H S Zhao
- Southwest Eye Hospital/Southwest Hospital, Third Military Medical University, Chongqing, China
| | | | | | | | | | | |
Collapse
|
14
|
Yin ZQ, Deng ZM, Crewther SG, Crewther DP. Altered expression of alternatively spliced isoforms of the mRNA NMDAR1 receptor in the visual cortex of strabismic cats. Mol Vis 2001; 7:271-6. [PMID: 11723445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
PURPOSE Although much has been written about the role of the NMDA receptor's role in experience dependent visual plasticity, the function of the NMDAR1 receptor subunit in the post-plasticity stage of development is still not well understood. However, in the well studied model of strabismic amblyopia where binocularity is reduced, but where most primary visual cortex neurons can be driven by one or other eye, the density of expression of NMDAR1 receptor protein is significantly reduced, compared to normals. This study aims to identify which of eight isoforms of the spliced heterogeneous variants of the NMDAR1 mRNA receptor gene are associated with this decrease in expression as a means of elucidating possible function. METHODS A series of digoxygenin-labelled oligonucleotide probes based on the human gene sequence have been used for in situ hybridization (ISH) of sections from the striate cortex of four adult cats. The probes were used to uniquely detect the expression of alternatively spliced mRNA variants in 66,487 cells from sections from the area centralis projection of two normal cats and two cats made esotropic as kittens by tenotomy at two weeks of age. RESULTS As expected, total NMDAR1 mRNA isoform expression was significantly lower in the striate cortex of strabismic compared to normal cats. The proportion of cortical cells expressing the R1-a, R1-b, and R1-1 isoforms in strabismic animals was decreased while the proportion expressing R1-3 was increased, especially in layers V and VI. No significant difference in expression of the R1-2 and R1-4 isoforms was seen comparing strabismic and normal cats. CONCLUSIONS These results confirm our previous findings and suggest that transcriptional inhibition of specific isoforms of NMDAR1 mRNA may underlie the change in receptor expression. This preferential reduction in the proportion of neurons bearing particular NMDAR1 isoforms, i.e. isoforms R1-a and b, and R1-1 with partial compensation through the expression of the R1-3 isoform, is more likely related to lowered proportion of binocularly activated neurons in the strabismic cat than to changes in eye dominance or the presence of amblyopia in one eye.
Collapse
Affiliation(s)
- Z Q Yin
- School of Optometry, University of New South Wales, Sydney, Australia.
| | | | | | | |
Collapse
|
15
|
Ma SW, Zhao DL, Yin ZQ, Mukherjee R, Singh B, Qin HY, Stiller CR, Jevnikar AM. Transgenic plants expressing autoantigens fed to mice to induce oral immune tolerance. Nat Med 1997; 3:793-6. [PMID: 9212110 DOI: 10.1038/nm0797-793] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Oral administration of protein can induce antigen-specific immune hyporesponsiveness. However, the utility of oral tolerance to autoantigens in the treatment of autoimmune diseases may be limited when candidate autoantigens cannot be produced by conventional systems in quantities sufficient for clinical studies. Plants may be ideally suited for this purpose, as they can synthesize, glycosylate and assemble mammalian proteins to provide huge quantities of relatively low cost soluble proteins. Furthermore, edible transgenic plants could provide a simple and direct method of autoantigen delivery for oral tolerance. Therefore, the aim of this study was to determine whether a transgenic plant expression system was capable of synthesizing the diabetes-associated autoantigen, glutamic acid decarboxylase (GAD) in an immunogenic form and whether the oral administration of an autoantigen expressed by a plant could directly induce protective immune responses in a mouse model of diabetes. We show that a GAD-expressing transgenic plant, given as a dietary supplement, inhibits the development of diabetes in the non-obese diabetic (NOD) mouse.
Collapse
Affiliation(s)
- S W Ma
- Transplantation Immunobiology Group, John P. Robarts Research Institute, University of Western Ontario, London, Canada
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Yin ZQ, Crewther SG, Pirie B, Crewther DP. Cat-301 immunoreactivity in the lateral geniculate nucleus and visual cortex of the strabismic amblyopic cat. Aust N Z J Ophthalmol 1997; 25 Suppl 1:S107-9. [PMID: 9267642 DOI: 10.1111/j.1442-9071.1997.tb01773.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE It was investigated whether alterations in neuronal structure and function occasioned by strabismic amblyopia also may be reflected in alterations in the expression on Y type neurons of a Cat-301 antibody sensitive antigen in the lateral geniculate nucleus (LGN) and cortex of our cat model of strabismic amblyopia. METHODS/RESULTS The percentage of positively labelled cells was reduced in LGN laminae that received input from the deviated eye in strabismic amblyopic cats compared with normal cats. In the strabismic cortex, the density of immunopositive neurons was significantly reduced compared with normal the effect being most pronounced in layer IV. CONCLUSIONS Despite previous physiological recordings indicating a decrease in X-cell associated acuity in strabismic amblyopia, the present findings imply that the changes in the early visual experience occasioned by strabismus also produce specific molecular changes in the Y neuronal class.
Collapse
Affiliation(s)
- Z Q Yin
- School of Optometry, University of New South Wales, Sydney, Australia
| | | | | | | |
Collapse
|
17
|
Yin ZQ, Millar TJ, Beaumont P, Sarks S. Widespread choroidal insufficiency in primary open-angle glaucoma. J Glaucoma 1997; 6:23-32. [PMID: 9075077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE The purpose of this study was to investigate choroidal perfusion in glaucoma, using histological and angiographic techniques. METHODS We examined the choroidal vasculature in clinicopathological slides from 25 cases of primary open-angle glaucoma, five cases of optic atrophy, and 18 normal eyes. We measured choroidal thickness at fixed distances from the disk margin with light microscopy. Using a quantitative computer image analysis system, we established the depth of all vessels and the best fitting diameter and width-to-length ratio for each vessel in three pairs of eyes. Separate statistical analyses were done on the parapapillary area and the whole choroid. We compared standard fluorescein angiographic measures to peak choroidal filling time in a further 78 glaucoma and 84 normal eyes. RESULTS Choroids were significantly (approximately 50 microns) thinner in glaucoma than in normal or optic atrophy irrespective of fundal position. Vessel frequency and mean diameter, relative to normal, showed greatest decrease near the choriocapillaris. Peak choroidal filling was the only fluorescein angiographic measure that was significantly delayed in glaucoma irrespective of age. CONCLUSIONS Reduced choroidal thickness in primary open-angle glaucoma is primarily due to loss of the innermost choroidal vessels. Overall size decreases without significant flattening. These changes are not seen with optic atrophy alone and may be correlated with the delayed choroidal perfusion seen in fluorescein angiography.
Collapse
Affiliation(s)
- Z Q Yin
- School of Optometry, University of New South Wales, Kensington, Australia
| | | | | | | |
Collapse
|
18
|
Yin ZQ, Crewther SG, Yang M, Crewther DP. Distribution and localization of NMDA receptor subunit 1 in the visual cortex of strabismic and anisometropic amblyopic cats. Neuroreport 1996; 7:2997-3003. [PMID: 9116227 DOI: 10.1097/00001756-199611250-00040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
ACTIVATION of NMDA (N-methyl-D-aspartate) receptors has recently been proposed as a prerequisite for the induction of experience-dependent modification of visual cortical neurones seen during early postnatal development. A new monoclonal antibody to the NMDA receptor subunit 1 (NMDA-R1) has been used to localize and compare the distribution of the receptors in the primary visual cortex of normal cats and those raised with either amblyopia induced by monocular optical blur or monocular esotropic strabismus. Although all three groups showed densest labelling in layers II-III, a comparison of immunopositive cells at any depth below the cortical surface showed a significantly lower frequency in strabismic and anisometropic cats than in normal cats, but a greater frequency in anisometropic cats that in strabismic animals. There appears to be no direct relationship between the expression of NMDA-R1 receptors and the level of excitability, binocularity or neuronal acuity known to exist in either of these two cat models of amblyopia, thus raising further questions as to the precise nature of the role of NMDA receptors in the processes of visual cortical plasticity.
Collapse
Affiliation(s)
- Z Q Yin
- School of Optometry, University of New South Wales, Sydney, Australia
| | | | | | | |
Collapse
|
19
|
Mukherjee R, Zhang Z, Zhong R, Yin ZQ, Roopenian DC, Jevnikar AM. Lupus nephritis in the absence of renal major histocompatibility complex class I and class II molecules. J Am Soc Nephrol 1996; 7:2445-52. [PMID: 8959638 DOI: 10.1681/asn.v7112445] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
MRL/Mp-lpr/lpr (MRL-lpr) mice develop an aggressive autoimmune disorder characterized by arthritis, vasculitis, and glomerulonephritis. Renal injury is associated with increased expression of major histocompatibility complex (MHC) molecules, as well as cytokines, adhesion molecules (intracellular adhesion molecule-1, vascular cell adhesion molecule-1), and autoantibodies. By using either MHC Class I (MRL-lpr B2m-/-) or MHC Class II deficient (MRL-lpr Ab-/-) kidneys in a transplant model, we tested the role of renal expression of these molecules in the development of autoimmune renal injury. Kidneys from MRL-lpr B2m-/- or MRL-lpr Ab-/- mice as well as control wild-type mice transplanted into MRL-lpr wt/- recipients developed nephritis, CD4+ and CD8+ T cell infiltration, and heavy glomerular deposition of immunoglobulin. Spontaneously proliferating autoreactive T cells were found in wild-type MRL-lpr and MRL-lpr B2m-/- but not MRL-lpr Ab-/- mice. These results suggest that the absence of renal expression of either Class I or Class II molecules does not provide marked protection from autoimmune lupus nephritis and supports the possibility that protection from autoimmune disease in MRL-lpr Ab-1- mice is related to the loss of autoreactive MHC Class II-dependent CD4+ T cells.
Collapse
Affiliation(s)
- R Mukherjee
- Robarts Research Institute, London, Ontario, Canada
| | | | | | | | | | | |
Collapse
|
20
|
Yin ZQ, Crewther SG, Yang M, Crewther DP. Immunocytochemical study of the NMDA receptor in the visual cortex of strabismic cat. Aust N Z J Ophthalmol 1996; 24:88-91. [PMID: 8811257 DOI: 10.1111/j.1442-9071.1996.tb01006.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Z Q Yin
- School of Optometry, University of New South Wales, Kensington
| | | | | | | |
Collapse
|
21
|
Yin ZQ, Li CY, Pei X, Fang QX. Development of pattern ERG and pattern VEP spatial resolution in kittens with unilateral esotropia. Invest Ophthalmol Vis Sci 1994; 35:626-34. [PMID: 8113013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
PURPOSE To follow the development of strabismic amblyopia longitudinally by comparing mean amplitudes and the visual spatial resolving ability of retinal and cortical pattern responses at various stages of postnatal development in unilateral iatrogenic convergent strabismic kittens. METHODS Surgery to produce iatrogenic convergent strabismus was performed on 20 kittens at 3 weeks of age; three kittens were used for controls. The monocular transient pattern electroretinogram (PERG) and pattern visual evoked potential (PVEP) were recorded simultaneously on the 23 kittens throughout development. RESULTS The PVEPs of the strabismic eyes were very reduced at 4 to 5 postnatal weeks (P < 0.01). The reduction increased at 6 to 16 weeks but was even worse at 17 to 30 weeks. The PERG of the squinting eye showed only a slight reduction in the first 4 to 5 weeks of age (P > 0.05), the decrease of responses was significant (P < 0.01) at 6 to 16 weeks and 17 to 30 weeks. At 4 to 8 weeks of age, the PVEP evoked through the unoperated eye in kittens consisted mainly of two positive components of similar amplitude. During development, the slow component decreased in comparison to the fast one, and its peak shifted forward until it merged into the fast (P100) component. CONCLUSIONS Esotropic amblyopia did affect the PERG and the PVEP in the amblyopic eye, but the effect on the PERG was less severe, had slower onset, and did not continue as long as for the PVEP.
Collapse
Affiliation(s)
- Z Q Yin
- Shanghai Institute of Physiology, Chinese Academy of Sciences
| | | | | | | |
Collapse
|
22
|
Yin ZQ. [Analysis of pattern visual evoked potential (VEP) in amblyopic children]. Zhonghua Yan Ke Za Zhi 1988; 24:268-71. [PMID: 3148422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
23
|
Yan HY, Yang YH, Gui SL, Zhu YQ, Yin ZQ, Wang LZ, Zhang FS, Qian XM. [The schistosomicidal effect of bromo-acetoacetic ester compounds (author's transl)]. Zhongguo Yao Li Xue Bao 1981; 2:54-9. [PMID: 6461204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|