Abstract
ECa 233 has been reported for the treatment of inflammatory-related disorders. Therefore, the objective of this study is to examine the effects of ECa 233 and their mechanisms on RAW264.7 macrophage-conditioned medium and nutrient stress-induced adipocytes under condition. Preadipocytes were differentiated into mature adipocyte and apoptotic cell death was observed by Hoechst 33,342 staining. The inflammatory cytokine levels were analyzed using ELISA. The protein expression of B-cell lymphoma 2 (Bcl-2), Bcl2 associated x (Bax), pro-caspase 3, cleaved caspase 3, p38, extracellular signal-regulated kinase 1/2 (ERK1/2) and nuclear factor-κB (NF-κB) were performed by western blot. Our results showed that macrophage-conditioned medium and nutrient stress significantly increased (P < 0.05) the number of apoptotic cells, and released the inflammatory cytokines including tumor necrosis factor alpha (TNF-α) and interleukin-1β (IL-1β) via the activation of ERK1/2, p38 MAPK and NF-κB involving the development of inflammation in 3T3-L1 adipocytes. ECa 233 at 10–100 μg/mL significantly inhibited the number of apoptotic cell death. At mechanistic level, the exposure of ECa 233 to 3T3-L1 adipocytes showed a reduction of Bax/Bcl2 ratio, and subsequently inhibited the proteolytic activity of caspase-3. The production of TNF-α and IL-1β were significantly decreased after treatment with ECa 233 (1–100 μg/mL). Additionally, ECa 233 inhibited adipocytokine levels by downregulated ERK1/2, p38 MAPK, and NF-κB protein expression. Taken together, the present findings indicate that ECa 233 possesses anti-inflammatory effect in adipocytes though suppressing NF-κB and MAPK pathway. This study provides the information regarding the protective effect of ECa 233 against dysregulated adipocytes related to diseases.
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Data availability
The data generated and analyzed during the current study are available from the corresponding authors on reasonable request by permission of institute and department chairman’s.
Abbreviations
- AAA:
-
Abdominal aortic aneurysm
- Akt:
-
Protein kinase B
- Bcl-2:
-
B-cell lymphoma 2
- Bax:
-
Bcl2 associated x
- ELISA:
-
Enzyme-linked immunosorbent assay
- ERK:
-
Extracellular signal-regulated kinase
- FBS:
-
Fetal bovine serum
- IL-1β:
-
Interleukin-1β
- LPS:
-
Lipopolysaccharide
- MAPKs:
-
Mitogen-activated protein kinases
- MTT:
-
3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NF-κB:
-
Nuclear factor-κB
- TNF-α:
-
Tumor necrosis factor alpha
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Acknowledgements
The authors are grateful to the Faculty of Science Research Fund, Prince of Songkla University, Contract no. 1-2562-02-016. We thank Publication clinic, Prince of Songkla University for the assistance in manuscript language editing.
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Nareenath Muneerungsee, Wanida Sukketsiri and Furoida Moolsap performed the experimental study; Nobuhiro Zaima and Supita Tanasawet conceived and drafted, edited, and approved the paper; Wandee Udomuksorna and Mayuree Tantisira edited the paper. Wanida Sukketsiri designed the study, funding acquisition, writing- review, editing and approved the paper.
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Muneerungsee, N., Tanasawet, S., Moolsap, F. et al. The standardized Centella asiatica extract suppressed the inflammation and apoptosis in macrophage-conditioned medium and nutrient stress-induced adipocytes. Biologia 77, 3545–3554 (2022). https://doi.org/10.1007/s11756-022-01194-5
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DOI: https://doi.org/10.1007/s11756-022-01194-5