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低剂量和高剂量环索奈德治疗12个月的持续哮喘患者,采用骨代谢相关的新标志物进行前瞻性随访

2012/05/08

   前言:接受长期激素吸入治疗的哮喘患者常常关注的是,即使在没有肾上腺抑制的情况下,该治疗是否会对全身骨代谢造成不良影响。
   目的:本试验旨在研究高剂量和低剂量环索奈德治疗1年是否对哮喘患者骨代谢敏感的生物标志物产生影响。
   设计:对储存的样本进行事后分析。入选的患者来自一项为期1年随访的前瞻性、随机、平行分组临床试验。在苏格兰泰赛德进行的初级护理研究。
   参与者:共计164名轻度至重度持续哮喘患者入选,年龄18~65岁,甘露醇支气管激发试验诊断有气道高反应性。119名完成本研究的患者中,100名患者检测了骨代谢标志物。
   干预措施:调整环索奈德的剂量,以控制甘露醇支气管激发证实的持续哮喘(气道高反应性策略)或对照组的持续哮喘(基于症状、缓解用药和肺功能),治疗持续1年。
转归检测:基础水平和治疗12个月后,检测骨形成(I型胶原氨基端肽[PINP]、III型胶原氨基端肽[PIIINP])、骨吸收(I型胶原羧基末端肽[ICTP]、I型胶原交联的C-端肽[CTx])和肾上腺抑制(隔夜尿皮质醇/肌酐比例)标志物。
   结果:12个月内,平均环索奈德剂量在AHR组为507 μg/d(n = 50),对照组为202 μg/d(n = 50)(P < 0.00001)。AHR组和对照组在基础水平和治疗12个月后,PINP、PIIINP、ICTP和CTx上无显著差异,在骨代谢标志物比例(PINP/ICTP、PIIINP/CTx、隔夜尿皮质醇/肌酐比例)上也无显著差异。
   结论:持续哮喘患者高剂量环索奈德吸入治疗12个月,并不会对骨代谢相关的敏感标志物产生影响。
(苏楠 审校)
J Clin Endocrinol Metab. 2012 Mar 21. [Epub ahead of print]
 
 

Source
University of Dundee, Dundee DD1 9SY, Scotland, United Kingdom.

Abstract
CONTEXT:
In asthmatic patients receiving long-term inhaled corticosteroid therapy, there are concerns regarding the potential for developing systemic adverse effects on bone metabolism, possibly even in the absence of adrenal suppression.
OBJECTIVE:The aim of this study was to investigate whether exposure to inhaled ciclesonide at high vs. low doses over 1 yr causes any significant systemic adverse effect on sensitive biomarkers of bone turnover in asthmatic patients.
DESIGN: Post hoc analysis of stored samples was performed in a subgroup of patients from a prospective, randomized parallel group trial with 1 yr follow-up.
SETTING: We conducted a primary care study in Tayside, Scotland.
PARTICIPANTS: A total of 164 mild-moderate persistent asthmatics aged 18-65 yr with evidence of airway hyperresponsiveness using mannitol bronchial challenge were enrolled into the original study. Of the 119 completed patients per protocol, 100 participants had bone marker samples available for analysis.
INTERVENTIONS: Ciclesonide was titrated to control persistent asthma against either mannitol bronchial challenge [airway hyperresponsiveness (AHR) strategy] or a control group (based on symptoms, reliever use, and pulmonary function) over 1 yr.
OUTCOME MEASURES: We measured markers of bone formation [amino-terminal propeptide of type I collagen (PINP), amino-terminal propeptide of type III collagen (PIIINP)], resorption [carboxy-terminal telopeptide of type I collagen (ICTP), type I collagen cross-linked C-telopeptide (CTx)], and adrenal suppression (overnight urinary cortisol/creatinine ratio) at 0 and 12 months.
RESULTS: Mean ciclesonide doses after 12 months were: AHR, 507 μg/d (n = 50); and controls, 202 μg/d (n = 50) (P < 0.00001). There were no significant differences between AHR and control groups either at baseline or after 12 months in PINP, PIIINP, ICTP, or CTx; or in ratios of bone turnover as PINP/ICTP, PIIINP/CTx, or overnight urinary cortisol/creatinine ratio.
CONCLUSION: Higher doses of inhaled ciclesonide do not adversely affect sensitive markers of bone turnover in persistent asthmatics over 12 months.

J Clin Endocrinol Metab. 2012 Mar 21. [Epub ahead of print]


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