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Adly HA, El-Okby AWY, Yehya AA, El-Shamy AA, Galhom RA, Hashem MA, Ahmed MF. Circumferential Esophageal Reconstruction Using a Tissue-engineered Decellularized Tunica Vaginalis Graft in a Rabbit Model. J Pediatr Surg 2024; 59:1486-1497. [PMID: 38692944 DOI: 10.1016/j.jpedsurg.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 03/26/2024] [Accepted: 04/05/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND Pediatric surgeons have faced esophageal reconstruction challenges for decades owing to a variety of congenital and acquired conditions. This work aimed to introduce a reproducible and efficient approach for creating tissue-engineered esophageal tissue using bone marrow mesenchymal stem cells (BMSCs) cultured in preconditioned mediums seeded on a sheep decellularized tunica vaginalis (DTV) scaffold for partial reconstruction of a rabbit's esophagus. METHODS DTV was performed using SDS and Triton X-100 solutions. The decellularized grafts were employed alone (DTV group) or after recellularization with BMSCs cultured for 10 days in preconditioned mediums (RTV group) for reconstructing a 3 cm segmental defect in the cervical esophagus of rabbits (n = 20) after the decellularization process was confirmed. Rabbits were observed for one month, after which they were euthanized, and the reconstructed esophagi were harvested for histological analysis. RESULTS Six rabbits in the DTV group and eight rabbits in the RTV group survived until the end of the one-month study period. Despite histological examination demonstrating that both grafts completely repaired the esophageal defect, the RTV graft demonstrated a histological structure similar to that of the normal esophagus. The reconstructed esophagi in the RTV group revealed the arrangement of the different layers of the esophageal wall with the formation of newly formed blood vessels and Schwann-like cells. CONCLUSION DTV xenograft is a novel scaffold that promotes cell adhesion and differentiation and might be effectively utilized for regenerating esophageal tissue, paving the way for future clinical trials in pediatric patients.
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Affiliation(s)
- Hassan A Adly
- Pediatric Surgery Unit, General Surgery Department, Faculty of Medicine, Al-Azhar University (Assiut Branch), Assiut, Egypt.
| | - Abdel-Wahab Y El-Okby
- Department of Pediatric Surgery, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Abdel-Aziz Yehya
- Department of Pediatric Surgery, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Ahmed A El-Shamy
- Pediatric Surgery Unit, General Surgery Department, Faculty of Medicine, Al-Azhar University (Assiut Branch), Assiut, Egypt
| | - Rania A Galhom
- Department of Human Anatomy and Embryology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt; Tissue Culture Lab, Center of Excellence of Molecular and Cellular Medicine (CEMCM), Faculty of Medicine, Suez Canal University, Ismailia, Egypt; Department of Human Anatomy and Embryology, Faculty of Medicine, Badr University in Cairo (BUC), Cairo, Egypt
| | - Mohamed A Hashem
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Mahmoud F Ahmed
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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Farabi B, Roster K, Hirani R, Tepper K, Atak MF, Safai B. The Efficacy of Stem Cells in Wound Healing: A Systematic Review. Int J Mol Sci 2024; 25:3006. [PMID: 38474251 PMCID: PMC10931571 DOI: 10.3390/ijms25053006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/18/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Wound healing is an intricate process involving coordinated interactions among inflammatory cells, skin fibroblasts, keratinocytes, and endothelial cells. Successful tissue repair hinges on controlled inflammation, angiogenesis, and remodeling facilitated by the exchange of cytokines and growth factors. Comorbid conditions can disrupt this process, leading to significant morbidity and mortality. Stem cell therapy has emerged as a promising strategy for enhancing wound healing, utilizing cells from diverse sources such as endothelial progenitor cells, bone marrow, adipose tissue, dermal, and inducible pluripotent stem cells. In this systematic review, we comprehensively investigated stem cell therapies in chronic wounds, summarizing the clinical, translational, and primary literature. A systematic search across PubMed, Embase, Web of Science, Google Scholar, and Cochrane Library yielded 22,454 articles, reduced to 44 studies after rigorous screening. Notably, adipose tissue-derived mesenchymal stem cells (AD-MSCs) emerged as an optimal choice due to their abundant supply, easy isolation, ex vivo proliferative capacities, and pro-angiogenic factor secretion. AD-MSCs have shown efficacy in various conditions, including peripheral arterial disease, diabetic wounds, hypertensive ulcers, bullous diabeticorum, venous ulcers, and post-Mohs micrographic surgery wounds. Delivery methods varied, encompassing topical application, scaffold incorporation, combination with plasma-rich proteins, and atelocollagen administration. Integration with local wound care practices resulted in reduced pain, shorter healing times, and improved cosmesis. Stem cell transplantation represents a potential therapeutic avenue, as transplanted stem cells not only differentiate into diverse skin cell types but also release essential cytokines and growth factors, fostering increased angiogenesis. This approach holds promise for intractable wounds, particularly chronic lower-leg wounds, and as a post-Mohs micrographic surgery intervention for healing defects through secondary intention. The potential reduction in healthcare costs and enhancement of patient quality of life further underscore the attractiveness of stem cell applications in wound care. This systematic review explores the clinical utilization of stem cells and stem cell products, providing valuable insights into their role as ancillary methods in treating chronic wounds.
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Affiliation(s)
- Banu Farabi
- Department of Dermatology, New York Medical College, Valhalla, NY 10595, USA;
- Department of Dermatology, NYC H+Health Hospitals/Metropolitan Hospital Center, New York, NY 10029, USA
- Department of Dermatology, NYC H+Health Hospitals/South Brooklyn Health, Brooklyn, NY 11235, USA
| | - Katie Roster
- School of Medicine, New York Medical College, Valhalla, NY 10595, USA; (K.R.); (R.H.)
| | - Rahim Hirani
- School of Medicine, New York Medical College, Valhalla, NY 10595, USA; (K.R.); (R.H.)
| | - Katharine Tepper
- Phillip Capozzi, M.D. Library, New York Medical College, Valhalla, NY 10595, USA;
| | - Mehmet Fatih Atak
- Department of Internal Medicine, NYC H+Health Hospitals/Metropolitan Hospital Center, New York, NY 10029, USA;
| | - Bijan Safai
- Department of Dermatology, New York Medical College, Valhalla, NY 10595, USA;
- Department of Dermatology, NYC H+Health Hospitals/Metropolitan Hospital Center, New York, NY 10029, USA
- Department of Dermatology, NYC H+Health Hospitals/South Brooklyn Health, Brooklyn, NY 11235, USA
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Combination of EPC-EXs and NPC-EXs with miR-126 and miR-210 overexpression produces better therapeutic effects on ischemic stroke by protecting neurons through the Nox2/ROS and BDNF/TrkB pathways. Exp Neurol 2023; 359:114235. [PMID: 36174747 DOI: 10.1016/j.expneurol.2022.114235] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 09/17/2022] [Accepted: 09/22/2022] [Indexed: 12/30/2022]
Abstract
BACKGROUNDS/AIMS Neural progenitor cells (NPCs) and endothelial progenitor cell (EPCs) exhibit synergistical effects on protecting endothelial cell functions. MiR-126 and miR-210 can protect cell activities by regulating brain-derived neurotrophic factor (BDNF) and reactive oxygen species (ROS) production. Exosomes (EXs) mediate the beneficial effects of stem cells via delivering microRNAs (miRs). Here, we investigated the combination effects of EXs from EPCs (EPC-EXs) and NPCs (NPC-EXs), and determined whether these EXs with miR-126 (EPC-EXsmiR-126) and miR-210 overexpression (NPC-EXsmiR-210) had better effects on hypoxia/reoxygenation (H/R)-injured neurons and ischemic stroke (IS). METHODS Cultured neurons were subjected to hypoxia for 6 h and then co-cultured with culture medium, NPC-EXs, EPC-EXs, NPC-EXs + EPC-EXs or NPC-EXsmiR-210 + EPC-EXsmiR-126 under normoxia for 24 h. Cell apoptosis, ROS production, neurite outgrowth and BDNF level were analyzed. Permanent middle cerebral artery occlusion (MCAO) was performed on C57BL/6 mice to build IS model. The mice were injected with PBS or various EXs via tail vein 2 h after MCAO operation. After 24 h, infarct volume and neurological deficits score (NDS), neuronal apoptosis, ROS production and spine density of dendrites, and brain BDNF level were analyzed. For mechanism study, NADPH oxidase 2(Nox2) and BDNF receptor tyrosine kinase receptor B (TrkB) were determined, and TrkB inhibitor k-252a was used in in vitro and in vivo study. RESULTS 1) The level of miR-210 or miR-126 was increased after NPC-EXs or EPC-EXs treatment respectively. 2) In H/R-injured neurons, NPC-EXs or EPC-EXs decreased cell apoptosis and ROS production and promoted neurite outgrowth, which were associated with the downregulation of Nox2 and the increase of BDNF and p-TrkB/TrkB level. 3) In MCAO mice, NPC-EXs or EPC-EXs decreased infarct volume and NDS, reduced neural apoptosis and ROS production, and promoted the spine density of dendrites. The levels of Nox2, BDNF and p-TrkB/TrkB in mouse brain tissues changed in similar patterns as seen in the in vitro study. 4) In both cell and mouse models, combination of NPC-EXs and EPC-EXs was more effective than NPC-EXs or EPC-EXs alone on all of these effects. 5) EPC-EXsmiR-126 + NPC-EXsmiR-210 had better effects compared to NPC-EXs + EPC-EXs, which were inhibited by k-252a. CONCLUSION EPC-EXsmiR-126 combined NPC-EXsmiR-210 further orchestrate the combinative protective effects of EPC-EXs and NPC-EXs on IS, possibly by protecting H/R-injured neurons through the Nox2/ ROS and BDNF/TrkB pathways.
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Custodia A, Ouro A, Sargento-Freitas J, Aramburu-Núñez M, Pías-Peleteiro JM, Hervella P, Rosell A, Ferreira L, Castillo J, Romaus-Sanjurjo D, Sobrino T. Unraveling the potential of endothelial progenitor cells as a treatment following ischemic stroke. Front Neurol 2022; 13:940682. [PMID: 36158970 PMCID: PMC9492921 DOI: 10.3389/fneur.2022.940682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Ischemic stroke is becoming one of the most common causes of death and disability in developed countries. Since current therapeutic options are quite limited, focused on acute reperfusion therapies that are hampered by a very narrow therapeutic time window, it is essential to discover novel treatments that not only stop the progression of the ischemic cascade during the acute phase, but also improve the recovery of stroke patients during the sub-acute or chronic phase. In this regard, several studies have shown that endothelial progenitor cells (EPCs) can repair damaged vessels as well as generate new ones following cerebrovascular damage. EPCs are circulating cells with characteristics of both endothelial cells and adult stem cells presenting the ability to differentiate into mature endothelial cells and self-renew, respectively. Moreover, EPCs have the advantage of being already present in healthy conditions as circulating cells that participate in the maintenance of the endothelium in a direct and paracrine way. In this scenario, EPCs appear as a promising target to tackle stroke by self-promoting re-endothelization, angiogenesis and vasculogenesis. Based on clinical data showing a better neurological and functional outcome in ischemic stroke patients with higher levels of circulating EPCs, novel and promising therapeutic approaches would be pharmacological treatment promoting EPCs-generation as well as EPCs-based therapies. Here, we will review the latest advances in preclinical as well as clinical research on EPCs application following stroke, not only as a single treatment but also in combination with new therapeutic approaches.
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Affiliation(s)
- Antía Custodia
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Alberto Ouro
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - João Sargento-Freitas
- Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculdade de Medicina da Universidade de Coimbra, Coimbra, Portugal
- Centro Neurociências e Biologia Celular, Coimbra, Portugal
| | - Marta Aramburu-Núñez
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Juan Manuel Pías-Peleteiro
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Pablo Hervella
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Anna Rosell
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Lino Ferreira
- Faculdade de Medicina da Universidade de Coimbra, Coimbra, Portugal
- Centro Neurociências e Biologia Celular, Coimbra, Portugal
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, UC, Biotech Parque Tecnológico de Cantanhede, University of Coimbra, Coimbra, Portugal
| | - José Castillo
- Neuroimaging and Biotechnology Laboratory (NOBEL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Daniel Romaus-Sanjurjo
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
- *Correspondence: Daniel Romaus-Sanjurjo
| | - Tomás Sobrino
- NeuroAging Laboratory (NEURAL), Clinical Neurosciences Research Laboratory (LINC), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
- Tomás Sobrino
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Yan F, Liu X, Ding H, Zhang W. Paracrine mechanisms of endothelial progenitor cells in vascular repair. Acta Histochem 2022; 124:151833. [PMID: 34929523 DOI: 10.1016/j.acthis.2021.151833] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/01/2021] [Accepted: 12/09/2021] [Indexed: 12/20/2022]
Abstract
Endothelial progenitor cells (EPCs) play an important role in repairing damaged blood vessels and promoting neovascularization. However, the specific mechanism of EPCs promoting vascular repair is still unclear. Currently, there are two different views on the repair of damaged vessels by EPCs, one is that EPCs can directly differentiate into endothelial cells (ECs) and integrate into injured vessels, the other is that EPCs act on cells and blood vessels by releasing paracrine substances. But more evidence now supports the latter. Therefore, the paracrine mechanisms of EPCs are worth further study. This review describes the substances secreted by EPCs, some applications based on paracrine effects of EPCs, and the studies of paracrine mechanisms in cardiovascular diseases--all of these are to support the view that EPCs repair blood vessels through paracrine effects rather than integrating directly into damaged vessels.
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Affiliation(s)
- Fanchen Yan
- The Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China
| | - Xiaodan Liu
- The Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China
| | - Huang Ding
- The Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China
| | - Wei Zhang
- The Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China.
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Santo SD, Seiler S, Guzman R, Widmer HR. Endothelial Progenitor Cell-Derived Factors Exert Neuroprotection in Cultured Cortical Neuronal Progenitor Cells. Cell Transplant 2021; 29:963689720912689. [PMID: 32193955 PMCID: PMC7444205 DOI: 10.1177/0963689720912689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
There is substantial evidence that stem and progenitor cells secrete
trophic factors that have potential for repairing injured tissues. We
have previously reported that the conditioned medium (CM) obtained
from endothelial progenitor cells (EPC) cultures protects striatal
neurons against 3-nitropropionic acid-induced toxicity. In the present
study we tested the hypothesis that EPC-CM may support cortical
neuronal cell function and/or survival. EPC were isolated from the
peripheral blood of healthy human donors and cultured in hypoxic
conditions (1.5% O2) to stimulate the secretion of growth
factors. The supernatant or conditioned medium (EPC-CM) was then
collected and used for the various experiments. Primary cultures of
cerebral cortex from fetal rat embryonic day 14 were treated with
EPC-CM and challenged by glucose and serum deprivation. We observed
that EPC-CM treatment significantly increased total cell number and
cell viability in the cultures. Similarly, the number of
lba1-expressing cells was significantly upregulated by EPC-CM, while
western blot analyses for the astroglial marker glial fibrillary
acidic protein did not show a marked difference. Importantly, the
number of beta-lll-tubulin-positive neurons in the cultures was
significantly augmented after EPC-CM treatment. Similarly, western
blot analyses for beta-III-tubulin showed significant higher signal
intensities. Furthermore, EPC-CM administration protected neurons
against glucose- and serum deprivation-induced cell loss. In sum, our findings identified EPC-CM as a means to promote viability
and/or differentiation of cortical neurons and suggest that EPC-CM
might be useful for neurorestorative approaches.
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Affiliation(s)
- Stefano Di Santo
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Bern University Hospital, University of Bern, Bern, Switzerland.,Departments of Neurosurgery and Biomedicine, Basel University Hospital, University of Basel, Basel, Switzerland
| | - Stefanie Seiler
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Raphael Guzman
- Departments of Neurosurgery and Biomedicine, Basel University Hospital, University of Basel, Basel, Switzerland.,Both the authors share senior authorship
| | - Hans Rudolf Widmer
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Bern University Hospital, University of Bern, Bern, Switzerland.,Both the authors share senior authorship
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Di Santo S, Widmer HR. Sustained neuronal viability by paracrine factors: new opportunities for endothelial progenitor cell secretome. Neural Regen Res 2021; 16:1429-1430. [PMID: 33318440 PMCID: PMC8284278 DOI: 10.4103/1673-5374.301007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Stefano Di Santo
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, University Hospital Bern, Switzerland University of Bern, Inselspital, Switzerland
| | - Hans Rudolf Widmer
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, University Hospital Bern, Switzerland University of Bern, Inselspital, Switzerland
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Sadanandan N, Di Santo S, Widmer HR. Another win for endothelial progenitor cells: Endothelial progenitor cell-derived conditioned medium promotes proliferation and exerts neuroprotection in cultured neuronal progenitor cells. Brain Circ 2019; 5:106-111. [PMID: 31620656 PMCID: PMC6785943 DOI: 10.4103/bc.bc_41_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 01/08/2023] Open
Abstract
Progress in stem cell research demonstrates stem cells' potential for treating neurodegenerative diseases. Stem cells have proliferative/differentiative properties and produce a variety of paracrine factors that can potentially be used to regenerate nervous tissue. Previous studies have shown the positive regenerative effects of endothelial progenitor cells (EPCs), and thus, they may be used as a tool for regeneration. A study by Di Santo et al. explored whether EPC-derived conditioned medium (EPC-CM) promotes the survival of cultured striatal progenitor cells and attempted to find the paracrine factors and signaling pathways involved with EPC-CM's effects. The neuronal progenitor cells that were cultured with EPC-CM had much higher densities of GABA-immunoreactive (GABA-ir) neurons. It was shown that phosphatidylinositol-3-kinase/AKT and mitogen-activated protein kinase/ERK signaling pathways are involved in the proliferation of GABAergic neurons, as inhibition of these pathways decreased GABAergic densities. In addition, the results suggest that paracrine factors from EPC, both proteinaceous and lipidic, significantly elevated the viability and/or differentiation in the cultures. Importantly, it was found that EPC-CM provided neuroprotection against toxins from 3-nitropropionic acid. In sum, EPC-CM engendered proliferation and regeneration of the cultured striatal cells through paracrine factors and imparted neuroprotection. Furthermore, the effects of EPC-CM may generate a cell-free therapeutic strategy to address neurodegeneration.
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Affiliation(s)
- Nadia Sadanandan
- Department of Neurosurgery and Brain Repair, College of Medicine, University of South Florida Morsani, Tampa, FL, USA
| | - Stefano Di Santo
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Hans Rudolf Widmer
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Vahabzadeh-Hagh A, McCarthy TJ, De Taboada L, Streeter J, Pascual-Leone A, Lo EH, Hayakawa K. Near infrared light amplifies endothelial progenitor cell accumulation after stroke. CONDITIONING MEDICINE 2019; 2:170-177. [PMID: 34291201 PMCID: PMC8291201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Damage-associated molecular pattern signals may play key roles in mediating non-cell autonomous effects of pre and post-conditioning. Here, we show that near-infrared (NIR) light stimulation of astrocytes increases a calcium-dependent secretion of the prototypical DAMP, HMGB1, which may then accelerate endothelial progenitor cell (EPC) accumulation after stroke. Conditioned media from NIR-stimulated astrocytes increased EPC proliferation in vitro, and blockade of HMGB1 with siRNA diminished the effect. In vivo transcranial NIR treatment confirmed that approximately 40% of NIR could penetrate the scalp and skull. Concomitantly, NIR increased GFAP expression in normal mouse brain at 30 min after the irradiation. In a mouse model of focal ischemia, repeated irradiation of NIR at days 5, 9, and 13 successfully increased HMGB1 in peri-infarct cortex, leading to a higher accumulation of EPCs at 14 days post-stroke. Conditioning and tolerance are now known to involve cell-cell signaling between all cell types in the neurovascular unit. Taken together, our proof-of-concept study suggest that NIR light may be an effective conditioning tool to stimulate astrocytic signaling and promote EPC accumulation after stroke.
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Affiliation(s)
- Andrew Vahabzadeh-Hagh
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | | | | | | | - Alvaro Pascual-Leone
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Eng H. Lo
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA
| | - Kazuhide Hayakawa
- Neuroprotection Research Laboratory, Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts, USA
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