1
|
Yamashita T, Ahmad S, Wright KN, Roberts DJ, VonCannon JL, Wang H, Groban L, Dell’Italia LJ, Ferrario CM. Noncanonical Mechanisms for Direct Bone Marrow Generating Ang II (Angiotensin II) Predominate in CD68 Positive Myeloid Lineage Cells. Hypertension 2020; 75:500-509. [PMID: 31813348 PMCID: PMC6949383 DOI: 10.1161/hypertensionaha.119.13754] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/06/2019] [Indexed: 12/18/2022]
Abstract
Bone marrow (BM) Ang II (angiotensin II) is a major participant in the regulation of hematopoiesis and immunity. The novel tissue substrate Ang-(1-12) [angiotensin-(1-12)] and its cleaving enzyme chymase are an essential source of Ang II production in cardiac tissue. We hypothesized this noncanonical chymase-mediated Ang II-producing mechanism exists in the BM tissue. Immunohistostaining and flow cytometry confirmed the presence of Ang-(1-12) immunoreaction in the BM of SD (Sprague Dawley) rats. Chymase-mediated Ang II-producing activity in BM was ≈1000-fold higher than ACE (angiotensin-converting enzyme)-mediated Ang II-producing activity (4531±137 and 4.2±0.3 fmol/min per mg, respectively; n=6; P<0.001) and 280-fold higher than chymase activity in the left ventricle of 16.3±1.7 fmol/min per mg (P<0.001). Adding a selective chymase inhibitor, TEI-F00806, eliminated almost all 125I-Ang II production. Flow cytometry demonstrated that delta median fluorescence intensity of chymase in cluster of differentiation 68 positive cells was significantly higher than that in cluster of differentiation 68 negative cells (1546±157 and 222±48 arbitrary units, respectively; P=0.0021). Cluster of differentiation 68 positive and side scatter low subsets, considered to be myeloid progenitors, express the highest chymase fluorescence intensity in rat BM. Chymase activity and cellular expression was similar in both male and female rats. In conclusion, myeloid lineage cells, especially myeloid progenitors, have an extraordinary Ang II-producing activity by chymase in the BM.
Collapse
Affiliation(s)
| | | | | | | | | | - Hao Wang
- Department of Anesthesiology
- Department of Internal Medicine-Molecular Medicine
| | - Leanne Groban
- Department of Anesthesiology
- Department of Internal Medicine-Molecular Medicine
| | - Louis J. Dell’Italia
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham (UAB), Birmingham, Alabama
- Department of Veterans Affairs Medical Center, Birmingham, AL
| | - Carlos M. Ferrario
- Department of Surgery
- Department of Physiology-Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC
| |
Collapse
|
2
|
Jacinto TA, Meireles GS, Dias AT, Aires R, Porto ML, Gava AL, Vasquez EC, Pereira TMC, Campagnaro BP, Meyrelles SS. Increased ROS production and DNA damage in monocytes are biomarkers of aging and atherosclerosis. Biol Res 2018; 51:33. [PMID: 30185234 PMCID: PMC6123971 DOI: 10.1186/s40659-018-0182-7] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 08/31/2018] [Indexed: 01/11/2023] Open
Abstract
Background New evidence demonstrates that aging and dyslipidemia are closely associated with oxidative stress, DNA damage and apoptosis in some cells and extravascular tissues. However, in monocytes, which are naturally involved in progression and/or resolution of plaque in atherosclerosis, this concurrence has not yet been fully investigated. In this study, we evaluated the influence of aging and hypercholesterolemia on serum pro-inflammatory cytokines, oxidative stress, DNA damage and apoptosis in monocytes from apolipoprotein E-deficient (apoE−/−) mice compared with age-matched wild-type C57BL/6 (WT) mice. Experiments were performed in young (2-months) and in old (18-months) male wild-type (WT) and apoE−/− mice. Results Besides the expected differences in serum lipid profile and plaque formation, we observed that atherosclerotic mice exhibited a significant increase in monocytosis and in serum levels of pro-inflammatory cytokines compared to WT mice. Moreover, it was observed that the overproduction of ROS, led to an increased DNA fragmentation and, consequently, apoptosis in monocytes from normocholesterolemic old mice, which was aggravated in age-matched atherosclerotic mice. Conclusions In this study, we demonstrate that a pro-inflammatory systemic status is associated with an impairment of functionality of monocytes during aging and that these parameters are fundamental extra-arterial contributors to the aggravation of atherosclerosis. The present data open new avenues for the development of future strategies with the purpose of treating atherosclerosis.
Collapse
Affiliation(s)
- Thais A Jacinto
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil
| | - Giselle S Meireles
- Laboratory of Translational Physiology and Pharmacology, Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Rua Mercúrio, s/n, Boa Vista 1, Vila Velha, ES, 29102-623, Brazil
| | - Ananda T Dias
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil
| | - Rafaela Aires
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil
| | - Marcella L Porto
- Federal Institute of Education, Science and Technology (IFES), Vila Velha, ES, Brazil
| | - Agata L Gava
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil.,Division of Nephrology, McMaster University, Hamilton, ON, Canada
| | - Elisardo C Vasquez
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil.,Laboratory of Translational Physiology and Pharmacology, Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Rua Mercúrio, s/n, Boa Vista 1, Vila Velha, ES, 29102-623, Brazil
| | - Thiago Melo C Pereira
- Laboratory of Translational Physiology and Pharmacology, Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Rua Mercúrio, s/n, Boa Vista 1, Vila Velha, ES, 29102-623, Brazil.,Federal Institute of Education, Science and Technology (IFES), Vila Velha, ES, Brazil
| | - Bianca P Campagnaro
- Laboratory of Translational Physiology and Pharmacology, Pharmaceutical Sciences Graduate Program, Vila Velha University (UVV), Rua Mercúrio, s/n, Boa Vista 1, Vila Velha, ES, 29102-623, Brazil.
| | - Silvana S Meyrelles
- Laboratory of Translational Physiology, Health Sciences Center, Federal University of Espirito Santo (UFES), Vitoria, Brazil
| |
Collapse
|