Increased Transforming Growth Factor-β Production and Gene Expression by Peripheral Blood Monocytes of Hypertensive Patients
- 1 July 1997
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Hypertension
- Vol. 30 (1), 134-139
- https://doi.org/10.1161/01.hyp.30.1.134
Abstract
Cultured human peripheral blood monocytes are known to secrete and express transforming growth factor-β (TGF-β), a multifunctional cytokine that can be involved in myocardial and vascular remodeling. In addition, monocytes/macrophages have been demonstrated to be colocalized with fibrosis of hypertrophied heart and in the vascular wall of hypertensive vessels. In this study, we tested TGF-β production and mRNA expression in peripheral blood monocytes from hypertensive patients with myocardial hypertrophy and increased carotid myointimal thickness with respect to healthy normotensive control subjects. We found an increased TGF-β activity in the conditioned medium of monocytes from hypertensive patients compared with control subjects as evaluated by inhibition of [3H]thymidine incorporation by mink lung epithelial cells (−83% and −18% in hypertensive and normotensive subjects;P<.001). Western blot analysis confirmed a significant difference in the amount of TGF-β protein secreted in the conditioned medium of hypertensive patients compared with that of normotensive subjects. Finally, we also observed a 4.2- and 5.5-fold increase in the amount of TGF-β1and TGF-β2transcripts, respectively. Our results indicate an upregulation of the TGF-β system in the peripheral blood monocytes of hypertensive patients with cardiovascular structural changes, suggesting a possible role of TGF-β monocyte production in hypertensive disease.Keywords
This publication has 32 references indexed in Scilit:
- Structural remodeling in hypertensive heart disease and the role of hormones.Hypertension, 1994
- Transforming growth factor-beta 1 gene activation and growth of smooth muscle from hypertensive rats.Hypertension, 1994
- Tissue angiotensin converting enzyme in cardiac and vascular hypertrophy, repair, and remodeling.Hypertension, 1994
- The pathogenesis of atherosclerosis: a perspective for the 1990sNature, 1993
- Transforming growth factor-beta: recent progress and new challenges.The Journal of cell biology, 1992
- Blocking the interleukin-1 receptor inhibits leukotriene B4 and prostaglandin E2 generation in human monocyte culturesCellular Immunology, 1992
- Stimulation of autocrine platelet- derived growth factor AA-homodimer and transforming growth factor β in vascular smooth muscle cellsBiochemical and Biophysical Research Communications, 1991
- Endothelial dysfunction and subendothelial monocyte macrophages in hypertension. Effect of angiotensin converting enzyme inhibition.Hypertension, 1991
- The Transforming Growth Factor-beta FamilyAnnual Review of Cell Biology, 1990
- Inflammatory and immunomodulatory roles of TGF-βImmunology Today, 1989