Saravi, Babak; Li, Zhen; Pfannkuche, Judith; Wystrach, Laura; Häckel, Sonja; Albers, Christoph E; Grad, Sibylle; Alini, Mauro; Richards, Robert Geoffrey; Lang, Corinna; Südkamp, Norbert; Schmal, Hagen; Lang, Gernot (2021). Angiotensin II Type 1 Receptor Antagonist Losartan Inhibits TNF-α-Induced Inflammation and Degeneration Processes in Human Nucleus Pulposus Cells. Applied Sciences, 11(1), p. 417. MDPI 10.3390/app11010417
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Our recent study detected the expression of a tissue renin–angiotensin system (tRAS) in human intervertebral discs (IVDs). The present study sought to investigate the impact of the angiotensin II receptor type 1 (AGTR1) antagonist losartan on human nucleus pulposus (NP) cell inflammation and degeneration induced by tumor necrosis factor-α (TNF-α). Human NP cells (4 donors; Pfirrmann grade 2–3; 30–37-years–old; male) were isolated and expanded. TNF-α (10 ng/mL) was used to induce inflammation and degeneration. We examined the impact of losartan supplementation and measured gene expression of tRAS, anabolic, catabolic, and inflammatory markers in NP cells after 24 and 72 h of exposure. T0070907, a PPAR gamma antagonist, was applied to examine the regulatory pathway of losartan. Losartan (1 mM) significantly impaired the TNF-α-induced increase of pro-inflammatory (nitric oxide and TNF-α), catabolic (matrix metalloproteinases), and tRAS (AGTR1a and angiotensin-converting enzyme) markers. Further, losartan maintained the NP cell phenotype by upregulating aggrecan and downregulating collagen type I expression. In summary, losartan showed anti-inflammatory, anti-catabolic, and positive phenotype-modulating effects on human NP cells. These results indicate that tRAS signaling plays an important role in IVD degeneration, and tRAS modulation with losartan could represent a novel therapeutic approach.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery |
UniBE Contributor: |
Häckel, Sonja, Albers, Christoph E. |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2076-3417 |
Publisher: |
MDPI |
Language: |
English |
Submitter: |
Kathrin Aeschlimann |
Date Deposited: |
25 Jan 2022 17:34 |
Last Modified: |
05 Dec 2022 16:02 |
Publisher DOI: |
10.3390/app11010417 |
BORIS DOI: |
10.48350/164098 |
URI: |
https://boris.unibe.ch/id/eprint/164098 |
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