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Potential emerging roles of the novel adipokines adipolin/CTRP12 and meteorin-like/METRNL in obesity-osteoarthritis interplay
Cytokine ( IF 3.8 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.cyto.2020.155368
Basma H Sobieh 1 , Dina H Kassem 1 , Zeiad M Zakaria 2 , Hala O El-Mesallamy 3
Affiliation  

BACKGROUND Several insights into obesity-osteoarthritis (OA) relationship have been recently highlighted. Adipolin and metrnl are new adipokines also secreted by chondrocytes. However, their role in OA, and obesity-OA interplay hasn't been elucidated. Therefore, this study was designed to investigate the circulating as well as synovial fluid (SF) levels of adipolin and metrnl in osteoarthritic-patients compared to non-osteoarthritic subjects, and to study their association with OA-severity, dyslipidemia and insulin resistance (IR). METHODS Patients with osteoarthritis and obesity (n = 30), and subjects with obesity not suffering OA (n = 25) were enrolled in the current study. Circulating and SF-levels of adipolin, metrnl, and insulin, as well as SF-levels of matrix-metalloproteinase-13 (MMP-13) were measured by ELISA. Knee-radiographs using X-ray were done to determine OA-severity, and investigate its association with adipokines' levels. RESULTS Serum and SF-adipolin levels showed tendency to be lower in OA-patients compared to non-OA-subjects; serum: 0.64 [0.45-0.85] and 0.73 [0.62-0.78] ng/ml, p = 0.174, and SF: 0.53 [0.34-0.69] and 0.63 [0.44-0.74] ng/ml, p = 0.353, respectively. Additionally, serum adipolin showed negative-association with SF-MMP-13. However, when stratifying OA-patients into various severity grades, serum adipolin levels did not show a significant difference between them. Regarding serum metrnl, it was significantly lower in OA-patients compared to non-OA-subjects; 19.68 [10.40-53.40] and 48.83 [20.80-86.60] pg/ml, respectively, p = 0.018. Surprisingly, SF-metrnl levels were higher in OA-patients compared to non-OA-subjects; 912 [367-1524] and 315 [125-484] pg/ml, respectively, p = 0.007. SF-metrnl showed positive-association with insulin resistance, and negative-association with SF-MMP-13. Moreover, higher serum metrnl levels were found to be slightly associated with lower likelihood of OA in subjects with obesity; OR = 0.978, CI (0.960- 0.996), p = 0.02, and its levels were also found to be relatively lower in grade-4 compared to the less severe OAgrades. CONCLUSIONS Metrnl, and to a lesser extent adipolin seem to be interrelated with OA. Different in-context regulatory mechanisms for metrnl production from various tissues are strongly suggested. Importantly, the findings of the current study shed lights on metrnl as a potential novel mediator and therapeutic target to consider in obesity-OA interplay.

中文翻译:

新型脂肪因子 adipolin/CTRP12 和流星蛋白样/METRNL 在肥胖-骨关节炎相互作用中的潜在新兴作用

背景最近强调了对肥胖-骨关节炎(OA)关系的一些见解。Adipolin 和 mernl 是新的脂肪因子,也由软骨细胞分泌。然而,它们在 OA 中的作用以及肥胖与 OA 的相互作用尚未阐明。因此,本研究旨在研究与非骨关节炎受试者相比,骨关节炎患者的循环和滑液 (SF) 中的 adiolin 和 mernl 水平,并研究它们与 OA 严重程度、血脂异常和胰岛素抵抗 (IR) 的关系。 )。方法 患有骨关节炎和肥胖的患者(n = 30),以及没有患有 OA 的肥胖患者(n = 25)被纳入本研究。通过 ELISA 测量脂肪素、metrnl 和胰岛素的循环和 SF 水平,以及基质金属蛋白酶 13 (MMP-13) 的 SF 水平。使用 X 射线进行膝关节 X 光检查以确定 OA 的严重程度,并研究其与脂肪因子水平的关系。结果 与非 OA 受试者相比,OA 患者的血清和 SF-adipolin 水平显示出较低的趋势;血清:0.64 [0.45-0.85] 和 0.73 [0.62-0.78] ng/ml,p = 0.174,SF:0.53 [0.34-0.69] 和 0.63 [0.44-0.74] ng/ml,p = 0.353。此外,血清脂肪素与SF-MMP-13呈负相关。然而,当将 OA 患者分为不同的严重程度时,血清脂蛋白水平在他们之间没有显示出显着差异。与非 OA 受试者相比,OA 患者的血清 mernl 显着降低;分别为 19.68 [10.40-53.40] 和 48.83 [20.80-86.60] pg/ml,p = 0.018。令人惊讶的是,与非 OA 受试者相比,OA 患者的 SF-metrnl 水平更高。分别为 912 [367-1524] 和 315 [125-484] pg/ml,p = 0.007。SF-metrnl 与胰岛素抵抗呈正相关,与 SF-MMP-13 呈负相关。此外,发现较高的血清 mernl 水平与肥胖受试者患 OA 的可能性较低略有相关。OR = 0.978, CI (0.960- 0.996), p = 0.02,与不太严重的 OAgrades 相比,4 级的水平也相对较低。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。SF-metrnl 与胰岛素抵抗呈正相关,与 SF-MMP-13 呈负相关。此外,发现较高的血清 mernl 水平与肥胖受试者患 OA 的可能性较低略有相关。OR = 0.978, CI (0.960- 0.996), p = 0.02,与不太严重的 OAgrades 相比,4 级的水平也相对较低。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。SF-metrnl 与胰岛素抵抗呈正相关,与 SF-MMP-13 呈负相关。此外,发现较高的血清 mernl 水平与肥胖受试者患 OA 的可能性较低略有相关。OR = 0.978, CI (0.960- 0.996), p = 0.02,与不太严重的 OAgrades 相比,4 级的水平也相对较低。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。发现较高的血清 mernl 水平与肥胖受试者患 OA 的可能性较低略有相关;OR = 0.978, CI (0.960- 0.996), p = 0.02,与不太严重的 OAgrades 相比,4 级的水平也相对较低。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。发现较高的血清 mernl 水平与肥胖受试者患 OA 的可能性较低略有相关;OR = 0.978, CI (0.960- 0.996), p = 0.02,与不太严重的 OAgrades 相比,4 级的水平也相对较低。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。结论 Metrnl,在较小程度上,脂肪素似乎与 OA 相关。强烈建议从不同组织产生metrnl的不同背景调节机制。重要的是,当前研究的结果揭示了 mernl 作为肥胖-OA 相互作用中需要考虑的潜在新型介质和治疗靶点。
更新日期:2021-02-01
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