通过脂肪基质/干细胞不同亚群的球体模拟人皮下脂肪组织的脂解、脂肪生成和分泌能力。
Mimicking lipolytic, adipogenic, and secretory capacities of human subcutaneous adipose tissue by spheroids from distinct subpopulations of adipose stromal/stem cells.
作者信息
Côrtes Isis, Alves Gutemberg, Claudio-Da-Silva Cesar, Baptista Leandra Santos
机构信息
Federal University of Rio de Janeiro, Campus UFRJ Duque de Caxias Professor Geraldo Cidade, Rio de Janeiro, Brazil.
Laboratory of Tissue Bioengineering, National Institute of Metrology, Quality and Technology (Inmetro), Rio de Janeiro, Brazil.
出版信息
Front Cell Dev Biol. 2023 Sep 29;11:1219218. doi: 10.3389/fcell.2023.1219218. eCollection 2023.
Adipose tissue engineering may provide 3D models for the understanding of diseases such as obesity and type II diabetes. Recently, distinct adipose stem/stromal cell (ASC) subpopulations were identified from subcutaneous adipose tissue (SAT): superficial (sSAT), deep (dSAT), and the superficial retinacula cutis (sRC). This study aimed to test these subpopulations ASCs in 3D spheroid culture induced for adipogenesis under a pro-inflammatory stimulus with lipopolysaccharide (LPS). The samples of abdominal human subcutaneous adipose tissue were obtained during plastic aesthetic surgery (Protocol 145/09). ASC spheroids showed high response to adipogenic induction in sSAT. All ASC spheroids increased their capacity to lipolysis under LPS. However, spheroids from dSAT were higher than from sSAT ( = 0.0045) and sRC ( = 0.0005). Newly formed spheroids and spheroids under LPS stimulus from sSAT showed the highest levels of fatty acid-binding protein 4 (FABP4) and CCAAT/enhancer-binding protein-α (C/EBPα) mRNA expression compared with dSAT and sRC ( < 0.0001). ASC spheroids from sRC showed the highest synthesis of angiogenic cytokines such as vascular endothelial growth factor (VEGF) compared with dSAT ( < 0.0228). Under LPS stimulus, ASC spheroids from sRC showed the highest synthesis of pro-inflammatory cytokines such as IL-6 compared with dSAT ( < 0.0092). Distinct physiological properties of SAT can be recapitulated in ASC spheroids. In summary, the ASC spheroid from dSAT showed the greatest lipolytic capacity, from sSAT the greatest adipogenic induction, and sRC showed greater secretory capacity when compared to the dSAT. Together, all these capacities form a true mimicry of SAT and hold the potential to contribute for a deeper understanding of cellular and molecular mechanisms in healthy and unhealthy adipose tissue scenarios or in response to pharmacological interventions.
脂肪组织工程可为理解肥胖症和II型糖尿病等疾病提供三维模型。最近,在皮下脂肪组织(SAT)中鉴定出了不同的脂肪干细胞/基质细胞(ASC)亚群:浅部(sSAT)、深部(dSAT)和浅部皮肤支持带(sRC)。本研究旨在测试这些亚群的ASC在脂多糖(LPS)促炎刺激下诱导脂肪生成的三维球体培养中的情况。腹部人体皮下脂肪组织样本是在整形美容手术期间获取的(方案145/09)。ASC球体在sSAT中对脂肪生成诱导表现出高反应性。所有ASC球体在LPS作用下脂解能力均增强。然而,dSAT来源的球体高于sSAT来源的球体(P = 0.0045)和sRC来源的球体(P = 0.0005)。与dSAT和sRC相比,sSAT来源的新形成球体以及LPS刺激下的球体脂肪酸结合蛋白4(FABP4)和CCAAT/增强子结合蛋白-α(C/EBPα)mRNA表达水平最高(P < 0.0001)。与dSAT相比,sRC来源的ASC球体血管内皮生长因子(VEGF)等血管生成细胞因子的合成最高(P < 0.0228)。在LPS刺激下,与dSAT相比,sRC来源的ASC球体白细胞介素-6(IL-6)等促炎细胞因子的合成最高(P < 0.0092)。SAT的不同生理特性可在ASC球体中重现。总之,与dSAT相比,dSAT来源的ASC球体脂解能力最强,sSAT来源的球体脂肪生成诱导能力最强,sRC的分泌能力更强。所有这些能力共同构成了对SAT的真实模拟,并有潜力有助于更深入地理解健康和不健康脂肪组织情况下或对药物干预反应中的细胞和分子机制。