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Jiao Y, Peng W, Yang J, Li C. Effect of Repetitive Transcranial Magnetic Stimulation on the Nutritional Status and Neurological Function of Patients With Postischemic Stroke Dysphagia. Neurologist 2023; 28:69-72. [PMID: 35593910 DOI: 10.1097/nrl.0000000000000442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND This project aimed to explore the effects of repetitive transcranial magnetic stimulation (rTMS) on the nutritional status and neurological function of patients with postischemic stroke dysphagia. MATERIALS AND METHODS After recruiting 70 inpatients with cerebral infarction combined with dysphagia hospitalized in the Cerebrovascular Center of Guangdong Second Provincial General Hospital from June 2017 to June 2020, we assigned them randomly into a control group and an rTMS group. Patients in the control group received swallowing training, while patients of the rTMS group received swallowing training and rTMS. RESULTS Fifteen days after treatment, serum nutrition indexes and neurotrophic indexes of both groups were higher than before treatment, and their serum nerve injury indexes were lower than before treatment. After 15 days of treatment, the body nutrition indexes and neuronutrition indexes of the rTMS group were higher than those of the control group, while the nerve injury indexes of the rTMS group were lower than those of the control group. CONCLUSION rTMS in the treatment of dysphagia after stroke can better improve nutritional status and nerve function, reducing nerve damage.
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Affiliation(s)
- Yonggang Jiao
- Department of Neurology, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong Province
| | - Wei Peng
- Department of Neurology, People's Hospital of Wuwei of Gansu Province, Wuwei, Gansu Province, China
| | - Jingping Yang
- Department of Neurology, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong Province
| | - Cheng Li
- Department of Neurology, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong Province
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Central Nervous System Tissue Regeneration after Intracerebral Hemorrhage: The Next Frontier. Cells 2021; 10:cells10102513. [PMID: 34685493 PMCID: PMC8534252 DOI: 10.3390/cells10102513] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 12/11/2022] Open
Abstract
Despite marked advances in surgical techniques and understanding of secondary brain injury mechanisms, the prognosis of intracerebral hemorrhage (ICH) remains devastating. Harnessing and promoting the regenerative potential of the central nervous system may improve the outcomes of patients with hemorrhagic stroke, but approaches are still in their infancy. In this review, we discuss the regenerative phenomena occurring in animal models and human ICH, provide results related to cellular and molecular mechanisms of the repair process including by microglia, and review potential methods to promote tissue regeneration in ICH. We aim to stimulate research involving tissue restoration after ICH.
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Wang MY, Wang YX, Li-Ling J, Xie HQ. Adult Stem Cell Therapy for Premature Ovarian Failure: From Bench to Bedside. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:63-78. [PMID: 33427039 DOI: 10.1089/ten.teb.2020.0205] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Premature ovarian failure (POF) is a devastating condition for women of childbearing age with serious health consequences, including distress, infertility, osteoporosis, autoimmune disorders, ischemic heart disease, and increased mortality. In addition to the mainstay estrogen therapy, stem cell therapy has been tested as the result of rapid progress in cell biology and reprogramming research. We hereby provide a review for the latest research and issues related with stem cell-based therapy for POF, and provide a commentary on various methods for enhancing its effect. Large amount of animal studies have demonstrated an extensive benefit of stem cells for failed ovarian recovering. As shown by such studies, stem cell therapy can result in recovery of hormonal levels, follicular activation, ovarian angiogenesis, and functional restoration. Meanwhile, a study of molecular pathways revealed that the function of stem cells mainly depends on their paracrine actions, which can produce multiple factors for the promotion of ovarian angiogenesis and regulation of cellular functions. Nevertheless, studies using disease models also revealed certain drawbacks. Clinical trials have shown that menstrual cycle and even pregnancy may occur in POF patients following transplantation of stem cells, although the limitations, including inadequate number of cases and space for the improvement of transplantation methodology. Only with its safety and effect get substantial improvement through laboratory experiments and clinical trials, can stem cell therapy really bring benefits to more patients. Additionally, effective pretreatment and appropriate transplantation methods for stem cells are also required. Taken together, stem cell therapy has shown a great potential for the reversal of POF and is stepping from bench to bedside. Impact statement Premature ovarian failure (POF) is a devastating condition with serious clinical consequences. The purpose of this review was to summarize the current status of stem cell therapy for POF. Considering the diversity of cell types and functions, a rigorous review is required for the guidance for further research into this field. Meanwhile, the challenges and prospect for clinical application of stem cell treatment, methodological improvements, and innovations are addressed.
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Affiliation(s)
- Ming-Yao Wang
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Yi-Xuan Wang
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Jesse Li-Ling
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Hui-Qi Xie
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, Chengdu, China
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Yin R, Zhao S, Qiu C. Brain-derived neurotrophic factor fused with a collagen-binding domain inhibits neuroinflammation and promotes neurological recovery of traumatic brain injury mice via TrkB signalling. ACTA ACUST UNITED AC 2020; 72:539-550. [PMID: 32034779 DOI: 10.1111/jphp.13233] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/01/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVES As one of the vital nutrient factors in central nervous system (CNS), brain-derived neurotrophic factor (BDNF) can significantly attenuate neuron damage and promote neurogenesis. Nevertheless, little research has been conducted on regulating the effect of BDNF on the inflammatory response after traumatic brain injury (TBI). METHODS In this study, we used BDNF fused with a collagen-binding domain (CBD-BDNF) to maintain a sufficient concentration of BDNF in the TBI hemisphere, and then, the regulatory effects of BDNF and CBD-BDNF on the inflammatory response of microglia were investigated both on a TBI mice model in vivo and LPS-stimulated microglia experiment in vitro. KEY FINDINGS The results revealed that BDNF and CBD-BDNF had similar effects on attenuating the pro-inflammatory reactions but promoting anti-inflammatory responses of microglia induced by LPS in vitro. Furthermore, CBD-BDNF significantly improved the neurological behaviours of TBI mice and alleviated the inflammatory reaction after TBI, while BDNF had weaker effects compared with those of CBD-BDNF. Additionally, the TrkB inhibitor K252a significantly inhibited the above effects of CBD-BDNF. CONCLUSIONS In conclusion, CBD-BDNF can promote the anti-inflammatory function of microglia and neurological recovery of TBI mice through TrkB signalling.
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Affiliation(s)
- Rui Yin
- Department of Neurosurgery, Huzhou Central Hospital, Huzhou, China
| | - Shufa Zhao
- Department of Neurosurgery, Huzhou Central Hospital, Huzhou, China
| | - Caixia Qiu
- Department of Neurosurgery, Huzhou Central Hospital, Huzhou, China
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5
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Brain-Derived Neurotrophic Factor and Its Potential Therapeutic Role in Stroke Comorbidities. Neural Plast 2020; 2020:1969482. [PMID: 32399020 PMCID: PMC7204205 DOI: 10.1155/2020/1969482] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/14/2019] [Accepted: 11/08/2019] [Indexed: 12/17/2022] Open
Abstract
With the rise in the aging global population, stroke comorbidities have become a serious health threat and a tremendous economic burden on human society. Current therapeutic strategies mainly focus on protecting neurons from cytotoxic damage at the acute phase upon stroke onset, which not only is a difficult way to ameliorate stroke symptoms but also presents a challenge for the patients to receive effective treatment in time. The brain-derived neurotrophic factor (BDNF) is the most abundant neurotrophin in the adult brain, which possesses a remarkable capability to repair brain damage. Recent promising preclinical outcomes have made BDNF a popular late-stage target in the development of novel stroke treatments. In this review, we aim to summarize the latest progress in the understanding of the cellular/molecular mechanisms underlying stroke pathogenesis, current strategies and difficulties in drug development, the mechanism of BDNF action in poststroke neurorehabilitation and neuroplasticity, and recent updates in novel therapeutic methods.
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Shaaban CE, Aizenstein HJ, Jorgensen DR, Mahbubani RLM, Meckes NA, Erickson KI, Glynn NW, Mettenburg J, Guralnik J, Newman AB, Ibrahim TS, Laurienti PJ, Vallejo AN, Rosano C. Physical Activity and Cerebral Small Vein Integrity in Older Adults. Med Sci Sports Exerc 2020; 51:1684-1691. [PMID: 30817709 DOI: 10.1249/mss.0000000000001952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Identifying promoters of cerebral small vein integrity is important to counter vascular contributions to cognitive impairment and dementia. PURPOSE In this preliminary investigation, the effects of a randomized 24-month physical activity (PA) intervention on changes in cerebral small vein integrity were compared to those of a health education (HE) control. METHODS Cerebral small vein integrity was measured in 24 older adults (n = 8, PA; n = 16, HE) using ultra-high field MRI before and at the end of the 24-month intervention. Deep medullary veins were defined as straight or tortuous; percent change in straight length, tortuous length, and tortuosity ratio were computed. Microbleed count and white matter hyperintensities were also rated. RESULTS Accelerometry-based values of PA increased by 17.2% in the PA group but declined by 28.0% in the HE group. The PA group, but not the HE group, had a significant increase in straight vein length from baseline to 24-month follow-up (P = 0.02 and P = 0.21, respectively); the between-group difference in percent change in straight length was significant (increase: median, 93.6%; interquartile range, 112.9 for PA; median, 28.4%; interquartile range, 90.6 for HE; P = 0.07). Between group differences in other markers were nonsignificant. CONCLUSIONS Increasing PA in late-life may promote cerebral small vein integrity. This should be confirmed in larger studies.
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Affiliation(s)
- C Elizabeth Shaaban
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA.,Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA
| | - Howard Jay Aizenstein
- Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA.,Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA
| | - Dana R Jorgensen
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA.,Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA
| | | | - Nicole A Meckes
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA
| | - Kirk I Erickson
- Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA.,Department of Psychology, University of Pittsburgh, Pittsburgh, PA
| | - Nancy W Glynn
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA
| | | | - Jack Guralnik
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA
| | - Tamer S Ibrahim
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA
| | - Paul J Laurienti
- Laboratory for Complex Brain Networks, Wake Forest University School of Medicine, Winston-Salem, NC.,Department of Radiology, Wake Forest University School of Medicine, Winston-Salem, NC
| | - Abbe N Vallejo
- Department of Pediatrics, Children's Hospital of Pittsburgh, Pittsburgh, PA.,Department of Immunology, University of Pittsburgh, Pittsburgh, PA
| | - Caterina Rosano
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA.,Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA
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7
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Chen H, Dang Y, Liu X, Ren J, Wang H. Exogenous brain-derived neurotrophic factor attenuates neuronal apoptosis and neurological deficits after subarachnoid hemorrhage in rats. Exp Ther Med 2019; 18:3837-3844. [PMID: 31616511 PMCID: PMC6781831 DOI: 10.3892/etm.2019.8029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 08/14/2019] [Indexed: 01/01/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is a growth factor crucial for neuronal survival, while its role in subarachnoid hemorrhage (SAH)-induced neuronal apoptosis remains unclear. The aim of the present study was to investigate whether administering exogenous BDNF can protect against neuronal apoptosis and neurological deficits following SAH in a rat model. The BDNF level was found to be significantly decreased in the basal cortex at 6, 12, 24, 48 and 72 h following SAH. Exogenous BDNF significantly decreased the expression of Bax and reduced activation of caspase-3 and caspase-9 and the number of apoptotic neurons. Moreover, exogenous BDNF treatment significantly improved the neurological deficits at 72 h and long-term behavioral deficits (day 14) following SAH in a rat model. These findings indicate that exogenous BDNF attenuated SAH-induced neuronal injury in rats.
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Affiliation(s)
- Huayun Chen
- Department of Neurosurgery, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Yanwei Dang
- Department of Neurosurgery, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Xiao Liu
- Department of Neurosurgery, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Junwei Ren
- Department of Neurosurgery, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Hongquan Wang
- Department of Neurosurgery, Xiangyang No. 1 People's Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
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Yang Y, Lei L, Wang S, Sheng X, Yan G, Xu L, Liu J, Liu M, Zhen X, Ding L, Sun H. Transplantation of umbilical cord-derived mesenchymal stem cells on a collagen scaffold improves ovarian function in a premature ovarian failure model of mice. In Vitro Cell Dev Biol Anim 2019; 55:302-311. [PMID: 30820812 DOI: 10.1007/s11626-019-00337-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 02/12/2019] [Indexed: 12/21/2022]
Abstract
Premature ovarian failure (POF) is a refractory disease; one of the most important goals of treatment is to improve fertility. In the study, collagen scaffold loaded with human umbilical cord-derived mesenchymal stem cells (collagen/UC-MSCs) transplantation in POF mice preserved ovarian function, as supported by increased estrogen (E2) and anti-Mullerian hormone (AMH) levels, increased ovarian volume, and an increased number of antral follicles. Immunohistochemistry results of Ki67 indicated transplantation of collagen/UC-MSCs promoted granulosa cell proliferation, which is crucial to oocyte maturation and follicular development. Additionally, transplantation of collagen/UC-MSCs significantly promoted ovarian angiogenesis with the increased expression of CD31. In general, collagen/UC-MSCs transplantation probably is an effective therapeutic strategy of POF.
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Affiliation(s)
- Yanjun Yang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Drum Tower Clinic Medical College of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.,Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Lei Lei
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China.,Department of Obstetrics and Gynecology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, Jiangsu, China
| | - Shanshan Wang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Xiaoqiang Sheng
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Guijun Yan
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Lu Xu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Jingyu Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Mengyuan Liu
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Xin Zhen
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Lijun Ding
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China. .,Clinical Center for Stem Cell Research, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China.
| | - Haixiang Sun
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Drum Tower Clinic Medical College of Nanjing Medical University, Nanjing, 210029, Jiangsu, China. .,Center for Reproductive Medicine, Department of Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China.
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9
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Multimodality MRI assessment of grey and white matter injury and blood-brain barrier disruption after intracerebral haemorrhage in mice. Sci Rep 2017; 7:40358. [PMID: 28084426 PMCID: PMC5234017 DOI: 10.1038/srep40358] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 12/05/2016] [Indexed: 11/26/2022] Open
Abstract
In this study, we examined injury progression after intracerebral haemorrhage (ICH) induced by collagenase in mice using a preclinical 11.7 Tesla MRI system. On T2-weighted MRI, lesion and striatal volumes were increased on day 3 and then decreased from days 7 to 28. On day 3, with an increase in striatal water content, vasogenic oedema in the perihaematomal region presented as increased T2 and increased apparent diffusion coefficient (ADC) signal. With a synchronous change in T2 and ADC signals, microglial activation peaked on day 3 in the same region and decreased over time. Iron deposition appeared on day 3 around the haematoma border but did not change synchronously with ADC signals. Vascular permeability measured by Evans blue extravasation on days 1, 3, and 7 correlated with the T1-gadolinium results, both of which peaked on day 3. On diffusion tensor imaging, white matter injury was prominent in the corpus callosum and internal capsule on day 3 and then partially recovered over time. Our results indicate that the evolution of grey/white matter injury and blood-brain barrier disruption after ICH can be assessed with multimodal MRI, and that perihaematomal vasogenic oedema might be attributable to microglial activation, iron deposition, and blood-brain barrier breakdown.
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10
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Wang B, Yuan J, Xu J, Chen X, Ying X, Dong P. Brain-derived and glial cell line-derived neurotrophic factor fusion protein immobilization to laminin. Exp Ther Med 2016; 13:178-186. [PMID: 28123487 PMCID: PMC5245157 DOI: 10.3892/etm.2016.3925] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 09/01/2016] [Indexed: 11/06/2022] Open
Abstract
Damage to the recurrent laryngeal nerve often causes hoarseness, dyspnea, dysphagia, and sometimes asphyxia due to vocal cord paralysis which result in a reduction of quality of life. Brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) play critical roles in peripheral nerve regeneration. However, methods for efficiently delivering these molecules are lacking, which limits their use in clinical applications. The present study reports an effective strategy for targeting BDNF and GDNF to laminin by fusing the N-terminal domains of these molecules with agrin (NtA). More specifically, laminin-binding efficacy was assessed and sustained release assays of the delivery of BDNF or GDNF fused with NtA (LBD-BDNF or LBD-GDNF) to laminin were conducted in vitro. In addition, the bioactivity of LBD-BDNF and LBD-GDNF on laminin in vitro was investigated. LBD-BDNF and LBD-GDNF were each able to specifically bind to laminin and maintain their activity in vitro. Moreover, neurotrophic factors with NtA retained higher concentrations and bioactivity levels compared with those without NtA. The ratio of LBD-BDNF and LBD-GDNF that produced optimal effects was 4:6. BDNF and GDNF fused with NtA were effective in specifically binding to laminin. As laminin is a major component of the extracellular matrix, LBD-BDNF and LBD-GDNF may prove useful in the repair of peripheral nerve injuries.
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Affiliation(s)
- Baoxin Wang
- Department of Otolaryngology, Head and Neck Surgery, Shanghai Jiao Tong University Affiliated to Shanghai First People's Hospital, Shanghai 201620, P.R. China
| | - Junjie Yuan
- Department of Orthopedics, Shanghai Fengxian District Central Hospital, Shanghai Jiao Tong University Affiliated to Sixth People's Hospital South Campus, Shanghai 200011, P.R. China
| | - Jiafeng Xu
- School of Economics and Finance, Shanghai International Studies University, Shanghai 200083, P.R. China
| | - Xinwei Chen
- Department of Otolaryngology, Head and Neck Surgery, Shanghai Jiao Tong University Affiliated to Shanghai First People's Hospital, Shanghai 201620, P.R. China
| | - Xinjiang Ying
- Department of Otolaryngology, Head and Neck Surgery, Shanghai Jiao Tong University Affiliated to Shanghai First People's Hospital, Shanghai 201620, P.R. China
| | - Pin Dong
- Department of Otolaryngology, Head and Neck Surgery, Shanghai Jiao Tong University Affiliated to Shanghai First People's Hospital, Shanghai 201620, P.R. China
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11
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Wang B, Yuan J, Chen X, Xu J, Li Y, Dong P. Functional regeneration of the transected recurrent laryngeal nerve using a collagen scaffold loaded with laminin and laminin-binding BDNF and GDNF. Sci Rep 2016; 6:32292. [PMID: 27558932 PMCID: PMC4997630 DOI: 10.1038/srep32292] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/05/2016] [Indexed: 11/17/2022] Open
Abstract
Recurrent laryngeal nerve (RLN) injury remains a challenge due to the lack of effective treatments. In this study, we established a new drug delivery system consisting of a tube of Heal-All Oral Cavity Repair Membrane loaded with laminin and neurotrophic factors and tested its ability to promote functional recovery following RLN injury. We created recombinant fusion proteins consisting of brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) fused to laminin-binding domains (LBDs) in order to prevent neurotrophin diffusion. LBD-BDNF, LBD-GDNF, and laminin were injected into a collagen tube that was fitted to the ends of the transected RLN in rats. Functional recovery was assessed 4, 8, and 12 weeks after injury. Although vocal fold movement was not restored until 12 weeks after injury, animals treated with the collagen tube loaded with laminin, LBD-BDNF and LBD-GDNF showed improved recovery in vocalisation, arytenoid cartilage angles, compound muscle action potentials and regenerated fibre area compared to animals treated by autologous nerve grafting (p < 0.05). These results demonstrate the drug delivery system induced nerve regeneration following RLN transection that was superior to that induced by autologus nerve grafting. It may have potential applications in nerve regeneration of RLN transection injury.
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Affiliation(s)
- Baoxin Wang
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Junjie Yuan
- Department of Orthopedics, Shanghai Fengxian District Central Hospital, Shanghai Jiao Tong University Affiliated Sixth People's Hospital South Campus, Shanghai 201499, P.R. China
| | - Xinwei Chen
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Jiafeng Xu
- School of Economics and Finance, Shanghai International Studies University, Shanghai 200083, P.R. China
| | - Yu Li
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Pin Dong
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
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12
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Yang JW, Ru J, Ma W, Gao Y, Liang Z, Liu J, Guo JH, Li LY. BDNF promotes the growth of human neurons through crosstalk with the Wnt/β-catenin signaling pathway via GSK-3β. Neuropeptides 2015; 54:35-46. [PMID: 26311646 DOI: 10.1016/j.npep.2015.08.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 07/30/2015] [Accepted: 08/12/2015] [Indexed: 12/30/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) plays an important role in neuronal growth; however, the downstream regulatory mechanisms remain unclear. In this study, we investigated whether BDNF exerts its neurotrophic effects through the Wnt/β-catenin signaling pathway in human embryonic spinal cord neurons in vitro. We found that neuronal growth (soma size and average neurite length) was increased by transfection with a BDNF overexpression plasmid. Western blotting and real-time quantitative PCR showed that expression of the BDNF pathway components TrkB, PI3K, Akt and PLC-γ was increased by BDNF overexpression. Furthermore, the Wnt signaling factors Wnt, Frizzled and Dsh and the downstream target β-catenin were upregulated, whereas GSK-3β was downregulated. In contrast, when BDNF signaling was downregulated with BDNF siRNA, the growth of neurons was decreased. Furthermore, BDNF signaling factors, Wnt pathway components and β-catenin were all downregulated, whereas GSK-3β was upregulated. This suggests that BDNF affects the growth of neurons in vitro through crosstalk with Wnt signaling, and that GSK-3β may be a critical factor linking these two pathways. To evaluate this possibility, we treated neurons with 6-bromoindirubin-3'-oxime (BIO), a small molecule GSK-3β inhibitor. BIO reduced the effects of BDNF upregulation/downregulation on soma size and average neurite length, and suppressed the impact of BDNF modulation on the Wnt signaling pathway. Taken together, our findings suggest that BDNF promotes the growth of neurons in vitro through crosstalk with the Wnt/β-catenin signaling pathway, and that this interaction may be mediated by GSK-3β.
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Affiliation(s)
- Jin-Wei Yang
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China; Second Department of General Surgery, First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, China.
| | - Jin Ru
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China; Second Department of General Surgery, First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, China.
| | - Wei Ma
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China.
| | - Yan Gao
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China; Department of Pathology, Children's Hospital of Kunming City, Kunming, Yunnan 650034, China.
| | - Zhang Liang
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China.
| | - Jia Liu
- Second Department of General Surgery, First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, China.
| | - Jian-Hui Guo
- Second Department of General Surgery, First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, China.
| | - Li-Yan Li
- Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, China.
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