51. Intratracheal Administration of Autologous Bone Marrow-Derived Cells Ameliorates Monocrotaline-Induced Pulmonary Vessel Remodeling and Lung Inflammation in Rats
- Author
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Yamazato, Yoriko, Yamazato, Masanobu, Ishida, Akio, Fujita, Jiro, and Ohya, Yusuke
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Bone marrow cells -- Physiological aspects -- Research ,Inflammation -- Complications and side effects -- Care and treatment -- Research ,Lung diseases -- Care and treatment -- Research ,Health - Abstract
Purpose Inflammation is a feature of lung injury and plays a critical role in pulmonary vascular remodeling. Bone marrow-derived cells (BMCs) have anti-inflammatory properties and favor macrophage differentiation into an alternatively activated regulatory M2 profile. We investigated the effect of autologous BMCs on monocrotaline-induced pulmonary vessel remodeling and lung inflammation in rats, by direct administration into lungs via the airway. Methods BMCs were isolated and plastic-adherent cells were cultured for 3 weeks. 1 week following monocrotaline (60 mg/kg) treatment, fluorescently labeled autologous BMCs (1 x 10.sup.6 cells) or vehicle were administered intratracheally to male Sprague-Dawley rats. 4 weeks following monocrotaline treatment, lung pathology was evaluated. Results Monocrotaline increased pulmonary vessel wall thickness, perivascular infiltration, alveolar septal thickening, and inflammatory cell infiltration including T lymphocytes and monocytes/macrophages in alveolar areas, and also increased mRNA expression of inflammatory-related cytokines including IL-10 in the lung. Intratracheal administration of autologous BMCs prevented pulmonary vessel wall thickening and perivascular infiltration, and increased CD163-positive M2-like macrophages in perivascular areas. BMC administration inhibited the thickening of alveolar septa and reduced monocrotaline-induced inflammatory cell infiltration in lung parenchyma compared with monocrotaline-vehicle-treated-rats. Furthermore, BMCs administration increased expression of CD163-positive cells in perivascular areas and maintained the increased mRNA expression of IL-10. Conclusions Intratracheal administration of autologous BMCs prevented monocrotaline-induced pulmonary vessel remodeling and lung inflammation, at least in part, through induction of alternatively activated macrophages and regulation of the local lung environment toward resolving inflammation., Author(s): Yoriko Yamazato [sup.1] , Masanobu Yamazato [sup.2] , Akio Ishida [sup.2] , Jiro Fujita [sup.1] , Yusuke Ohya [sup.2] Author Affiliations: (Aff1) 0000 0001 0685 5104, grid.267625.2, Department of [...]
- Published
- 2018
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