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Abstract Number: 2086

4-Phenylbutyric Acid Mediates Therapeutic Effect in Systemic Lupus Erythematosus: Observations in an Experimental Murine Lupus Model

Yunjung Choi1, Ji-hyun Jung2, Eun-Kyeong Lee2, Myeung Su Lee3, Changhoon Lee4 and Wan-Hee Yoo5, 1Division of Rheumatology, Department of Internal Medicine, Research Institute of Clinical Medicine of chonbuk national university-Biomedical Research Institute of chonbuk national university hospital, jeonju, Korea, Republic of (South), 2Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea, Republic of (South), 3Department of Rheumatology, Division of Rheumatology, Department of Internal Medicine, Wonkwang University Hospital, Iksan, Korea, Republic of (South), 4Division of Rheumatology, Department of Internal Medicine, Division of Rheumatology, Department of Internal Medicine, Wonkwang University Hospital, Iksan, Korea, Republic of (South), 5Division of Rheumatology, Department of Internal Medicine, Research Institute of Clinical Medicine of chonbuk national university-Biomedical Research Institute of chonbuk national university hospital, Jeonju, Korea, Republic of (South)

Meeting: 2018 ACR/ARHP Annual Meeting

Keywords: Disease Activity, mouse model and systemic lupus erythematosus (SLE)

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Session Information

Date: Tuesday, October 23, 2018

Session Title: Systemic Lupus Erythematosus – Animal Models Poster

Session Type: ACR Poster Session C

Session Time: 9:00AM-11:00AM

Background/Purpose:

The purpose of the present study was to investigate whether ER stress inhibition by 4-phenylbutyric acid (4-PBA) ameliorates lupus manifestations in an experimental lupus model and the effect of ER stress inhibition by 4-PBA on the frequency and function of regulatory T cells (Treg).

Methods:

A murine lupus model was induced through a 4-week treatment with Resiquimod, a toll-like receptor agonist 7. From the 8th week, the mice were treated with phosphate buffered saline, 4-PBA, and dexamethasone for 4 weeks. The increment of body weight, spleen weight, anti-dsDNA antibody titer, serum cytokines level, and the pathology of glomerulonephritis were analyzed at 12 weeks of age. The population of immune cellular subset, including activated T and B lymphocytes and Treg, and suppressive functions of Treg, were measured.

Results:

4-PBA significantly decreased the level of anti-dsDNA antibodies and serum TNF-¥á in the murine lupus model. A significant decrease in accumulation of immunoglobulin and glomerulonephritis score was also observed in 4-PBA-treated and dexamethasone-treated mice compared to vehicle-treated group. ER stress inhibition decreased the activated T and B lymphocytes population of splenocytes, but the population of Treg was not significantly different between vehicle group and 4-PBA group. However, a markedly enhanced suppressive capacity of Treg was detected in 4-PBA-treated group.

Conclusion:

Our results suggest that ER stress inhibition attenuates disease activity, especially of lupus nephritis, in an experimental model by improving the suppressive capacity of Treg. Thus, reduction of ER stress could be used as a beneficial therapeutic strategy in SLE.


Disclosure: Y. Choi, None; J. H. Jung, None; E. K. Lee, None; M. S. Lee, None; C. Lee, None; W. H. Yoo, None.

To cite this abstract in AMA style:

Choi Y, Jung JH, Lee EK, Lee MS, Lee C, Yoo WH. 4-Phenylbutyric Acid Mediates Therapeutic Effect in Systemic Lupus Erythematosus: Observations in an Experimental Murine Lupus Model [abstract]. Arthritis Rheumatol. 2018; 70 (suppl 10). https://acrabstracts.org/abstract/4-phenylbutyric-acid-mediates-therapeutic-effect-in-systemic-lupus-erythematosus-observations-in-an-experimental-murine-lupus-model/. Accessed January 27, 2021.
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