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Fang B, Wang X, Sun Y, Xiong X, Meng X, Li W, Yi Z. Hypoxia-induced CCL2/CCR2 axis in adipose-derived stem cells (ADSCs) promotes angiogenesis by human dermal microvascular endothelial cells (HDMECs) in flap tissues. J Physiol Biochem 2023:10.1007/s13105-023-00944-6. [PMID: 36786974 DOI: 10.1007/s13105-023-00944-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 01/09/2023] [Indexed: 02/15/2023]
Abstract
Flap expansion has become an important method widely used in wound repair and organ reconstruction. However, distal skin flap ischemic necrosis remains a problematic complication. In this study, integrative bioinformatics analyses indicated the upregulation of C-C motif chemokine ligand 2 (CCL2) and C-C motif chemokine receptor 2 (CCR2) in reperfusion-exposed skin flap tissues. In adipose-derived stem cells (ADSCs, CD90-positive, CD29-positive, CD34-negative, and CD106-negative) exposed to hypoxia, HIF-1α and CCL2 levels were significantly elevated. Conditioned medium (CM) from hypoxia-stimulated ADSCs promoted HDMEC proliferation, migration, and tube formation, partially inhibited by sh-CCL2-induced CCL2 knockdown or neutralized antibody-induced CCL2 depletion in ADSCs. Consistently, CCL2, CCR2, TNF-α, TLR2, and TLR4 protein levels in HDMECs were significantly increased by hypoxia-treated ADSCs CM, and partially decreased by sh-CCL2-induced CCL2 knockdown or neutralizing antibody-induced CCL2 knockdown in ADSCs. In the flap expansion model, ADSCs transplantation significantly improved flap survival and angiogenesis by endothelial cells in flap tissues, whereas CCL2 knockdown in ADSCs partially eliminated the improvement by ADSCs transplantation; overexpression of CCL2 in ADSCs further promoted the effects of ADSCs transplantation on skin flap. In conclusion, the CCL2/CCR2 axis in ADSCs could be induced by hypoxia, promoting HDMEC proliferation, migration, and tube formation and improving flap survival and angiogenesis in flap tissues.
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Affiliation(s)
- Bairong Fang
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xiancheng Wang
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Yang Sun
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
| | - Xiang Xiong
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xianxi Meng
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Wenbo Li
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Zhongjie Yi
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
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CAI YC, ZHANG GY, LIAN J, SHI WJ, CAI YQ, FENG QY, ZHU L. Pre-expanded Muscle-Sparing Latissimus Dorsi Free Flap: An Ideal Option for the Reconstruction of Extensive Anterior Knee Contractures. J Plast Reconstr Aesthet Surg 2022; 75:3743-3750. [DOI: 10.1016/j.bjps.2022.06.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 05/19/2022] [Accepted: 06/07/2022] [Indexed: 11/29/2022]
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Min P, Li J, Brunetti B, Pu Z, Su W, Xi W, Zhang Z, Salzillo R, Feng S, Zhang Y. Pre-expanded bipedicled visor flap: an ideal option for the reconstruction of upper and lower lip defects postburn in Asian males. BURNS & TRAUMA 2020; 8:tkaa005. [PMID: 32341918 PMCID: PMC7175765 DOI: 10.1093/burnst/tkaa005] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/10/2019] [Accepted: 01/14/2020] [Indexed: 12/24/2022]
Abstract
Background Reconstruction of upper and lower lip subunits is a complicated and elusive challenge. For patients affected by defects involving upper and lower lip subunits, a technique able to reconstruct both aesthetic units with matched colour, sufficient contours and similar texture would be ideal. In this study, we present our experience with upper and lower lip reconstruction using the pre-expanded bipedicled visor flap. Methods From January 2014 to January 2017, 12 male patients presenting with defects of the upper and lower lip subunits were treated using this surgical technique. After a period of expansion of the scalp flap of over 6 months, the bipedicled visor flap was raised from both the parietal regions and rotated to resurface the defect. Delay and section of the pedicle were then performed. Results Twelve male patients with postburn scars aged 22 to 48 years (mean: 34 years) were successfully treated with no major complications. The donor site was closed primarily in all cases. Subsequent flap debulking and minor revisions were performed under local anaesthesia between 6 and 12 months postoperatively. Conclusions The pre-expanded bipedicled visor flap provides an effective and reliable option for upper and lower lip reconstruction with excellent colour and texture. It is feasible to achieve these results simultaneously from a single donor site by using a pre-expanded bipedicled visor flap.
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Affiliation(s)
- Peiru Min
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jie Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Beniamino Brunetti
- Department of Plastic and Reconstructive Surgery, Campus Bio-Medico University of Rome, Rome, Italy
| | - Zheming Pu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Weijie Su
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Wenjing Xi
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zheng Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Rosa Salzillo
- Department of Plastic and Reconstructive Surgery, Campus Bio-Medico University of Rome, Rome, Italy
| | - Shaoqing Feng
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yixin Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
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