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MRI texture analysis in acromegaly and its role in predicting response to somatostatin receptor ligands

肢端肥大症的 MRI 纹理分析及其在预测生长抑素受体配体反应中的作用

  • 影响因子:3.03
  • DOI:10.1007/s11102-019-01023-0
  • 作者列表:"Galm, Brandon P.","Buckless, Colleen","Swearingen, Brooke","Torriani, Martin","Klibanski, Anne","Bredella, Miriam A.","Tritos, Nicholas A.
  • 发表时间:2020-01-02
Abstract

Purpose Given the paucity of reliable predictors of tumor recurrence, progression, or response to somatostatin receptor ligand (SRL) therapy in acromegaly, we attempted to determine whether preoperative MR image texture was predictive of these clinical outcomes. We also determined whether image texture could differentiate somatotroph adenomas from non-functioning pituitary adenomas (NFPAs). Methods We performed a retrospective study of patients with acromegaly due to a macroadenoma who underwent transsphenoidal surgery at our institution between 2007 and 2015. Clinical data were extracted from electronic medical records. MRI texture analysis was performed on preoperative non-enhanced T1-weighted images using ImageJ (NIH). Logistic and Cox models were used to determine if image texture parameters predicted outcomes. Results Eighty-nine patients had texture parameters measured, which were compared to that of NFPAs, while 64 of these patients had follow-up and were included in the remainder of analyses. Minimum pixel intensity, skewness, and kurtosis were significantly different in somatotroph adenomas versus NFPAs (area under the receiver operating characteristic curve, 0.7771, for kurtosis). Furthermore, those with a maximum pixel intensity above the median had an increased odds of IGF-I normalization on SRL therapy (OR 5.96, 95% CI 1.33–26.66), which persisted after adjusting for several potential predictors of response. Image texture did not predict tumor recurrence or progression. Conclusion Our data suggest that MRI texture analysis can distinguish NFPAs from somatotroph macroadenomas with good diagnostic accuracy and can predict normalization of IGF-I with SRL therapy.

摘要

目的鉴于肢端肥大症肿瘤复发、进展或对生长抑素受体配体 (SRL) 治疗反应的可靠预测因子不足, 我们试图确定术前 MR 图像纹理是否能预测这些临床结局。我们还确定了图像纹理是否可以区分生长激素腺瘤和非功能性垂体腺瘤 (NFPAs)。方法我们对 2015 和 2007年在我们机构接受经蝶窦手术的大腺瘤所致肢端肥大症患者进行了回顾性研究。从电子病历中提取临床数据。使用 ImageJ (NIH) 对术前非增强 T1-weighted 图像进行 MRI 纹理分析。使用 Logistic 和 Cox 模型确定图像纹理参数是否预测结果。结果 89 例患者测量了纹理参数,并与 NFPAs 进行了比较,其中 64 例患者进行了随访,并被纳入其余分析。最小像素强度、偏度和峰度在生长激素腺瘤与 NFPAs (受试者工作特征曲线下面积,0.7771,峰度) 中存在显著差异。此外,那些最大像素强度高于中位数的患者在 SRL 治疗中 IGF-I 正常化的几率增加 (OR 5.96,95% CI 1.33-26.66)。在调整了几个潜在的反应预测因子后持续存在。图像纹理不能预测肿瘤复发或进展。结论 MRI 纹理分析可鉴别 NFPAs 和生长抑素大腺瘤,诊断准确性好,可预测 SRL 治疗后 IGF-I 的正常化。

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影响因子:3.03
发表时间:2020-01-02
来源期刊:Pituitary
DOI:10.1007/s11102-019-01023-0
作者列表:["Galm, Brandon P.","Buckless, Colleen","Swearingen, Brooke","Torriani, Martin","Klibanski, Anne","Bredella, Miriam A.","Tritos, Nicholas A."]

METHODS:Purpose Given the paucity of reliable predictors of tumor recurrence, progression, or response to somatostatin receptor ligand (SRL) therapy in acromegaly, we attempted to determine whether preoperative MR image texture was predictive of these clinical outcomes. We also determined whether image texture could differentiate somatotroph adenomas from non-functioning pituitary adenomas (NFPAs). Methods We performed a retrospective study of patients with acromegaly due to a macroadenoma who underwent transsphenoidal surgery at our institution between 2007 and 2015. Clinical data were extracted from electronic medical records. MRI texture analysis was performed on preoperative non-enhanced T1-weighted images using ImageJ (NIH). Logistic and Cox models were used to determine if image texture parameters predicted outcomes. Results Eighty-nine patients had texture parameters measured, which were compared to that of NFPAs, while 64 of these patients had follow-up and were included in the remainder of analyses. Minimum pixel intensity, skewness, and kurtosis were significantly different in somatotroph adenomas versus NFPAs (area under the receiver operating characteristic curve, 0.7771, for kurtosis). Furthermore, those with a maximum pixel intensity above the median had an increased odds of IGF-I normalization on SRL therapy (OR 5.96, 95% CI 1.33–26.66), which persisted after adjusting for several potential predictors of response. Image texture did not predict tumor recurrence or progression. Conclusion Our data suggest that MRI texture analysis can distinguish NFPAs from somatotroph macroadenomas with good diagnostic accuracy and can predict normalization of IGF-I with SRL therapy.

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翻译标题与摘要 下载文献
影响因子:4.48
发表时间:2020-01-01
DOI:10.1016/j.trsl.2019.07.013
作者列表:["Xiong Y","Tang Y","Fan F","Zeng Y","Li C","Zhou G","Hu Z","Zhang L","Liu Z"]

METHODS::Growth hormone-secreting pituitary adenoma (GHPA), a benign endocrine tumor located in the base of the skull, results in acromegaly. In addition to the mass effect of the tumor itself in the sellar region, GHPA can lead to the overgrowth of almost every organ. Previous findings indicated that the processes underlying acromegaly were partly attributable to hyperactivity of the growth hormone/insulin-like growth factor-1 (GH/IGF-1) axis. However, the mechanisms driving this syndrome remains largely unknown. Additionally, the roles of GHPA-derived exosomes, which contain functional microRNAs and proteins that manipulate target cell proliferation and differentiation in distal extremities, are also unknown. In this study, we demonstrated that GHPA exosomes promote bone formation in vitro and trabecula number in vivo. The mechanism of increased trabecula formation may be attributable to GHPA exosome-induced osteoblast proliferation via increased cell viability and DNA replication. We further discovered that exosomal hsa-miR-21-5p plays a distinct role from the GH/IGF-1 axis in these processes. Accordingly, the results of this study provide a novel mechanism whereby GHPA influences distal extremities and a new perspective for treating GHPA.

关键词: 暂无
翻译标题与摘要 下载文献
影响因子:5.19
发表时间:2020-01-01
DOI:10.1210/clinem/dgz033
作者列表:["Arlien-Søborg MC","Grøndahl C","Bæk A","Dal J","Madsen M","Høgild ML","Pedersen SB","Bjerre M","Jørgensen JOL"]

METHODS:BACKGROUND:Fibroblast growth factor 21 (FGF21) is a circulating hormone with pleiotropic metabolic effects, which is inactivated by fibroblast activation protein (FAP). Data regarding interaction between FGF21, FAP, and growth hormone (GH) are limited, but it is noteworthy that collagens are also FAP substrates, since GH potently stimulates collagen turnover. AIM:To measure circulating FGF21 components, including FAP, in patients with acromegaly before and after disease control. METHODS:Eighteen patients with active acromegaly were studied at the time of diagnosis and ≥ 6 months after disease control by either surgery or medical treatment. Serum levels of total and active FGF21, β-klotho, FAP, and collagen turnover markers were measured by immunoassays. Expression of putative FGF21-dependent genes were measured in adipose tissue by reverse transcriptase-polymerase chain reaction, body composition assessed by dual-energy x-ray absorptiometry scan, and insulin sensitivity estimated with homeostatic model assessment of insulin resistance (HOMA-IR). RESULTS:Total FGF21, active FGF21 and β-klotho remained unchanged. Insulin sensitivity and body fat mass increased after disease control but neither correlated with active FGF21. Expression of FGF21-dependent genes did not change after treatment. FAP levels (µg/L) were markedly reduced after treatment [105.6 ± 29.4 vs 62.2 ± 32.4, P < 0.000]. Collagen turnover markers also declined significantly after treatment and ΔFAP correlated positively with ΔProcollagen Type I (P < 0.000) and Type III (P < 0.000). CONCLUSION:1) Circulating FGF21 and β-klotho do not change in response to acromegaly treatment, 2) FAP concentrations in serum decrease after disease control and correlate positively with collagen turnover markers, and 3) FAP is a hitherto unrecognized GH target linked to collagen turnover. CLINICAL TRIALS REGISTRATION:NCT00647179.

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