背景:血清皮质醇(COR)浓度升高可能通过下调糖皮质激素受体(GCR)来诱导糖皮质激素抵抗,导致淋巴瘤犬的化疗疗效下降。
目的:研究淋巴瘤犬血清COR浓度与化疗结果之间的关系。
方法:30只客户拥有淋巴瘤的狗,使用诊断时收集的血清样品测量血清COR浓度。
方法:回顾性研究。根据血清COR浓度将狗分为2组:COR浓度<6μg/dL的正常组(n=16)和COR浓度≥6μg/dL的高组(14)。我们比较了标志,临床体征,舞台,淋巴瘤的类型,肾上腺大小,碱性磷酸酶(ALP)活性,对化疗的反应,无进展生存期(PFS),总生存期(OS),两组间P-糖蛋白(P-gp)-和GCR-阳性细胞率。
结果:两组之间的人口统计学特征没有显着差异。然而,高COR组对化疗的反应明显较低,PFS,OS与正常COR组比较。高COR组血清ALP活性明显高于正常COR组。高COR组的肾上腺大小也明显较大。虽然两组间P-gp阳性细胞率无显著性差异,高COR组GCR阳性细胞率显着降低。
结论:我们的数据表明,血清COR浓度的测量可能是一个潜在的预后因素和评估指标。
BACKGROUND: Increased serum cortisol (COR) concentrations may induce glucocorticoid resistance by down-regulation of glucocorticoid receptor (GCR), resulting in decreased chemotherapy efficacy in dogs with lymphoma.
OBJECTIVE: Investigate the relationship between serum COR concentrations and chemotherapy outcomes in dogs with lymphoma.
METHODS: Thirty client-owned dogs with lymphoma, with serum COR concentration measured using serum samples collected at diagnosis.
METHODS: Retrospective study. Dogs were divided into 2 groups based on serum COR concentrations: a normal group (n = 16) with COR concentrations <6 μg/dL and a high group (14) with COR concentrations ≥6 μg/dL. We compared signalment, clinical signs, stage, type of lymphoma, adrenal gland size, alkaline phosphatase (ALP) activity, response to chemotherapy, progression-free survival (PFS), overall survival (OS), and rate of P-glycoprotein (P-gp)- and GCR-positive cells between the 2 groups.
RESULTS: No significant differences were found in the demographic characteristics between the 2 groups. However, the high COR group exhibited a significantly lower response to chemotherapy, PFS, and OS compared with the normal COR group. Serum ALP activity was significantly higher in the high COR group than in the normal COR group. Adrenal gland size was also significantly larger in the high COR group. Although no significant differences were found in the rate of P-gp-positive cells between the 2 groups, the rate of GCR-positive cells was significantly lower in the high COR group.
CONCLUSIONS: Our data suggests that measurement of serum COR concentrations may serve as a potential prognostic factor and evaluation index.