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Abubakar M, Masood MF, Javed I, Adil H, Faraz MA, Bhat RR, Fatima M, Abdelkhalek AM, Buccilli B, Raza S, Hajjaj M. Unlocking the Mysteries, Bridging the Gap, and Unveiling the Multifaceted Potential of Stem Cell Therapy for Cardiac Tissue Regeneration: A Narrative Review of Current Literature, Ethical Challenges, and Future Perspectives. Cureus 2023; 15:e41533. [PMID: 37551212 PMCID: PMC10404462 DOI: 10.7759/cureus.41533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2023] [Indexed: 08/09/2023] Open
Abstract
Revolutionary advancements in regenerative medicine have brought stem cell therapy to the forefront, offering promising prospects for the regeneration of ischemic cardiac tissue. Yet, its full efficacy, safety, and role in treating ischemic heart disease (IHD) remain limited. This literature review explores the intricate mechanisms underlying stem cell therapy. Furthermore, we unravel the innovative approaches employed to bolster stem cell survival, enhance differentiation, and seamlessly integrate them within the ischemic cardiac tissue microenvironment. Our comprehensive analysis uncovers how stem cells enhance cell survival, promote angiogenesis, and modulate the immune response. Stem cell therapy harnesses a multifaceted mode of action, encompassing paracrine effects and direct cell replacement. As our review progresses, we underscore the imperative for standardized protocols, comprehensive preclinical and clinical studies, and careful regulatory considerations. Lastly, we explore the integration of tissue engineering and genetic modifications, envisioning a future where stem cell therapy reigns supreme in regenerative medicine.
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Affiliation(s)
- Muhammad Abubakar
- Department of Internal Medicine, Ameer-Ud-Din Medical College, Lahore General Hospital, Lahore, PAK
- Department of Internal Medicine, Siddique Sadiq Memorial Trust Hospital, Gujranwala, PAK
| | | | - Izzah Javed
- Department of Internal Medicine, Ameer-Ud-Din Medical College, Lahore General Hospital, Lahore, PAK
| | - Hira Adil
- Department of Community Medicine, Khyber Girls Medical College, Hayatabad, PAK
| | - Muhammad Ahmad Faraz
- Department of Forensic Medicine, Post Graduate Medical Institute, Lahore General Hospital, Lahore, PAK
| | - Rakshita Ramesh Bhat
- Department of Medical Oncology, Mangalore Institute of Oncology, Mangalore, IND
- Department of Internal Medicine, Bangalore Medical College and Research Institute, Bangalore, IND
| | - Mahek Fatima
- Department of Internal Medicine, Osmania Medical College, Hyderabad, IND
| | | | - Barbara Buccilli
- Department of Human Neuroscience, Sapienza University of Rome, Rome, ITA
| | - Saud Raza
- Department of Internal Medicine, Ameer-Ud-Din Medical College, Lahore General Hospital, Lahore, PAK
| | - Mohsin Hajjaj
- Department of Internal Medicine, Jinnah Hospital Lahore, Lahore, PAK
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Ibrahim M, Xie B, Richardson MK. The growth of endothelial-like cells in zebrafish embryoid body culture. Exp Cell Res 2020; 392:112032. [PMID: 32353375 DOI: 10.1016/j.yexcr.2020.112032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 04/21/2020] [Indexed: 11/25/2022]
Abstract
There is increasing interest in the possibility of culturing organ-like tissues (organoids) in vitro for biomedical applications. The ability to culture organoids would be greatly enhanced by having a functional circulation in vitro. The endothelial cell is the most important cell type in this context. Endothelial cells can be derived from pluripotent embryonic blastocyst cells in aggregates called embryoid bodies. Here, we examine the yield of endothelial-like cells in embryoid bodies (EBs) developed from transgenic zebrafish fli:GFP and kdrl:GFP blastocyst embryos. The isolated blastocyst cells developed into EBs within the first 24 h of culture and contained fli:GFP+ (putative endothelial, hematopoietic and other cell types); or kdrl:GFP+ (endothelial) cells. The addition of endothelial growth supplements to the media and culture on collagen type-I substratum increased the percentages of fli:GFP+ and kdrl:GFP+ cells in culture. We found that EBs developed in hanging-drop cultures possessed a higher percentage of fli:GFP+ (45.0 ± 3.1%) and kdrl:GFP+ cells (8.7 ± 0.7%) than those developed on conventional substrata (34.5 ± 1.4% or 5.2 ± 0.4%, respectively). The transcriptome analysis showed a higher expression of VEGF and TGFβ genes in EB cultures compared to the adherent cultures. When transferred to conventional culture, the percentage of fli:GFP+ or kdrl:GFP+ cells declined significantly over subsequent days in the EBs. The fli:GFP+ cells formed a monolayer around the embryoid bodies, while the kdrl:GFP+ cells formed vascular network-like structures in the embryoid bodies. Differences were observed in the spreading of fli:GFP+ cells, and network formation of kdrl:GFP+ cells on different substrates. The fli:GFP+ cells could be maintained in primary culture and sub-cultures. By contrast, kdrl:GFP+ cells were almost completely absent at 8d of primary culture. Our culture model allows real-time observation of fli:GFP+ and kdrl:GFP+ cells in culture. The results obtained from this study will be important for the development of vascular and endothelial cell culture using embryonic cells.
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Affiliation(s)
- Muhammad Ibrahim
- Institute of Biology Leiden, Leiden University, The Netherlands; Animal Biotechnology Division, Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar, Pakistan
| | - Bing Xie
- Institute of Biology Leiden, Leiden University, The Netherlands
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F4/80 + Host Macrophages Are a Barrier to Murine Embryonic Stem Cell-Derived Hematopoietic Progenitor Engraftment In Vivo. J Immunol Res 2016; 2016:2414906. [PMID: 27872864 PMCID: PMC5107259 DOI: 10.1155/2016/2414906] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 09/03/2016] [Accepted: 10/04/2016] [Indexed: 01/13/2023] Open
Abstract
Understanding how embryonic stem cells and their derivatives interact with the adult host immune system is critical to developing their therapeutic potential. Murine embryonic stem cell-derived hematopoietic progenitors (ESHPs) were generated via coculture with the bone marrow stromal cell line, OP9, and then transplanted into NOD.SCID.Common Gamma Chain (NSG) knockout mice, which lack B, T, and natural killer cells. Compared to control mice transplanted with adult lineage-negative bone marrow (Lin− BM) progenitors, ESHP-transplanted mice attained a low but significant level of donor hematopoietic chimerism. Based on our previous studies, we hypothesized that macrophages might contribute to the low engraftment of ESHPs in vivo. Enlarged spleens were observed in ESHP-transplanted mice and found to contain higher numbers of host F4/80+ macrophages compared to BM-transplanted controls. In vivo depletion of host macrophages using clodronate-loaded liposomes improved the ESHP-derived hematopoietic chimerism in the spleen but not in the BM. F4/80+ macrophages demonstrated a striking propensity to phagocytose ESHP targets in vitro. Taken together, these results suggest that macrophages are a barrier to both syngeneic and allogeneic ESHP engraftment in vivo.
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Abstract
PURPOSE OF REVIEW Ongoing research is constantly looking for means to modulate the immune system for long-lasting engraftment of pluripotent stem cells (PSC) during stem cell-based therapies. This study reviews data on in-vitro and in-vivo immunogenicity of embryonic and induced-PSC and describes how their immunological properties can be harnessed for tolerance induction in organ transplantation. RECENT FINDINGS Although PSC display immunomodulatory properties in vitro, they are capable of eliciting an immune response that leads to cell rejection when transplanted into immune-competent recipients. Nevertheless, long-term acceptance of PSC-derived cells/tissues in an allogeneic environment can be achieved using minimal host conditioning. Protocols for differentiating PSC towards haematopoietic stem cells, thymic epithelial precursors, dendritic cells, regulatory T cells and myeloid-derived suppressor cells are being developed, suggesting the possibility to use PSC-derived immunomodulatory cells to induce tolerance to a solid organ transplant. SUMMARY PSC and/or their derivatives possess unique immunological properties that allow for acceptance of PSC-derived tissue with minimal host conditioning. Investigators involved either in regenerative or in transplant medicine must join their efforts with the ultimate aim of using PSC as a source of donor-specific cells that would create a protolerogenic environment to achieve tolerance in solid organ transplantation.
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