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Fecal Akkermansia muciniphila Is Associated with Body Composition and Microbiota Diversity in Overweight and Obese Women with Breast Cancer Participating in a Presurgical Weight Loss Trial
Journal of the Academy of Nutrition and Dietetics ( IF 4.8 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.jand.2018.08.164
Andrew D. Frugé , William Van der Pol , Laura Q. Rogers , Casey D. Morrow , Yuko Tsuruta , Wendy Demark-Wahnefried

BACKGROUND Akkermansia muciniphila (AM) is a gram-negative, mucin-degrading bacteria inhabiting the gastrointestinal tract associated with host phenotypes and disease states. OBJECTIVE Explore characteristics of overweight and obese female early-stage (0 to II) breast cancer patients with low AM relative abundance (LAM) vs high (HAM) enrolled in a presurgical weight-loss trial. DESIGN Secondary analysis of pooled participants in a randomized controlled trial (NCT02224807). PARTICIPANTS/SETTING During the period from 2014 to 2017, 32 female patients with breast cancer were randomized to weight-loss or attention-control arms from time of diagnosis-to-lumpectomy (mean=30±9 days). INTERVENTION All were instructed to correct nutrient deficiencies via food sources and on upper-body exercises. The weight-loss group received additional guidance to promote 0.5 to 1 kg/wk weight-loss via energy restriction and aerobic exercise. MAIN OUTCOME MEASURES At baseline and follow-up, sera, fecal samples, two-24 hour dietary recalls and dual x-ray absorptiometry were obtained. Bacterial DNA was isolated from feces and polymerase chain reaction (16S) amplified. Inflammatory cytokines were measured in sera. STATISTICAL ANALYSES PERFORMED Differences between LAM and HAM participants were analyzed using t tests and nonparametric tests. Spearman correlations explored relationships between continuous variables. RESULTS Participants were aged 61±9 years with body mass index 34.8±6. Mean AM relative abundance was 0.02% (0.007% to 0.06%) and 1.59% (0.59% to 13.57%) for LAM and HAM participants, respectively. At baseline, women with HAM vs LAM had lower fat mass (38.9±11.2 kg vs 46.4±9.0 kg; P=0.044). Alpha diversity (ie, species richness) was higher in women with HAM (360.8±84.8 vs 282.4±69.6; P=0.008) at baseline, but attenuated after weight-loss (P=0.058). At baseline, interleukin-6 level was associated with species richness (ρ=-0.471, P=0.008) and fat mass (ρ=0.529, P=0.002), but not AM. Change in total dietary fiber was positively associated with AM in LAM (ρ=0.626, P=0.002), but not HAM (ρ=0.436, P=0.180) participants. CONCLUSIONS Among women with early-stage breast cancer, body composition is associated with AM, microbiota diversity, and interleukin-6 level. AM may mediate the effects of dietary fiber in improving microbiota composition.

中文翻译:

粪便 Akkermansia muciniphila 与参与术前减肥试验的超重和肥胖乳腺癌女性的身体成分和微生物群多样性有关

背景 Akkermansia muciniphila (AM) 是一种革兰氏阴性、粘蛋白降解细菌,栖息在与宿主表型和疾病状态相关的胃肠道中。目的 探索参加术前减肥试验的超重和肥胖女性早期(0 至 II)乳腺癌患者的特征,这些患者具有低 AM 相对丰度 (LAM) 与高 (HAM)。设计 随机对照试验 (NCT02224807) 中汇总参与者的二次分析。参与者/地点 在 2014 年至 2017 年期间,32 名女性乳腺癌患者从诊断到肿块切除术(平均 = 30±9 天)被随机分配到减肥组或注意力控制组。干预 所有人都被指示通过食物来源和上半身锻炼来纠正营养缺乏症。减重组接受额外指导,通过能量限制和有氧运动促进 0.5 至 1 公斤/周减重。主要结果测量 在基线和随访时,获得了血清、粪便样本、2-24 小时饮食回忆和双重 X 射线吸收测定法。从粪便中分离出细菌 DNA,并通过聚合酶链反应 (16S) 进行扩增。在血清中测量炎性细胞因子。执行的统计分析 使用 t 检验和非参数检验分析了 LAM 和 HAM 参与者之间的差异。Spearman 相关性探索了连续变量之间的关系。结果参与者年龄为 61±9 岁,体重指数为 34.8±6。LAM 和 HAM 参与者的平均 AM 相对丰度分别为 0.02%(0.007% 至 0.06%)和 1.59%(0.59% 至 13.57%)。在基线,与 LAM 相比,患有 HAM 的女性脂肪量更低(38.9±11.2 kg 对比 46.4±9.0 kg;P=0.044)。在基线时,患有 HAM 的女性的α多样性(即物种丰富度)较高(360.8±84.8 vs 282.4±69.6;P=0.008),但在减肥后减弱(P=0.058)。在基线时,IL-6 水平与物种丰富度(ρ=-0.471,P=0.008)和脂肪量(ρ=0.529,P=0.002)相关,但与 AM 无关。在 LAM (ρ=0.626, P=0.002) 参与者中,总膳食纤维的变化与 AM 呈正相关,但与 HAM (ρ=0.436, P=0.180) 参与者无关。结论 在患有早期乳腺癌的女性中,身体成分与 AM、微生物群多样性和白细胞介素 6 水平相关。AM 可能会介导膳食纤维改善微生物群组成的作用。8 对 282.4±69.6;P=0.008) 在基线时,但在减肥后减弱 (P=0.058)。在基线时,IL-6 水平与物种丰富度(ρ=-0.471,P=0.008)和脂肪量(ρ=0.529,P=0.002)相关,但与 AM 无关。在 LAM (ρ=0.626, P=0.002) 参与者中,总膳食纤维的变化与 AM 呈正相关,但与 HAM (ρ=0.436, P=0.180) 参与者无关。结论 在患有早期乳腺癌的女性中,身体成分与 AM、微生物群多样性和白细胞介素 6 水平相关。AM 可能会介导膳食纤维改善微生物群组成的作用。8 对 282.4±69.6;P=0.008) 在基线时,但在减肥后减弱 (P=0.058)。在基线时,IL-6 水平与物种丰富度(ρ=-0.471,P=0.008)和脂肪量(ρ=0.529,P=0.002)相关,但与 AM 无关。在 LAM (ρ=0.626, P=0.002) 参与者中,总膳食纤维的变化与 AM 呈正相关,但与 HAM (ρ=0.436, P=0.180) 参与者无关。结论 在患有早期乳腺癌的女性中,身体成分与 AM、微生物群多样性和白细胞介素 6 水平相关。AM 可能会介导膳食纤维改善微生物群组成的作用。在 LAM (ρ=0.626, P=0.002) 参与者中,总膳食纤维的变化与 AM 呈正相关,但与 HAM (ρ=0.436, P=0.180) 参与者无关。结论 在患有早期乳腺癌的女性中,身体成分与 AM、微生物群多样性和白细胞介素 6 水平相关。AM 可能会介导膳食纤维改善微生物群组成的作用。在 LAM (ρ=0.626, P=0.002) 参与者中,总膳食纤维的变化与 AM 呈正相关,但与 HAM (ρ=0.436, P=0.180) 参与者无关。结论 在患有早期乳腺癌的女性中,身体成分与 AM、微生物群多样性和白细胞介素 6 水平相关。AM 可能会介导膳食纤维改善微生物群组成的作用。
更新日期:2020-04-01
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