Factors affecting response to everolimus therapy for subependymal giant cell astrocytomas associated with tuberous sclerosis.

Abstract:

BACKGROUND:The aim of the study was to investigate factors affecting response to everolimus, a mammalian-target-of-rapamycin (mTOR) inhibitor, of subependymal giant cell astrocytomas (SEGA) in patients with tuberous sclerosis complex (TSC). METHODS:The study group consisted of 15 children with a diagnosis of TSC-related SEGA. Median therapy duration was 13 months. Age, sex, previous neurosurgical or mTOR inhibitor treatment, everolimus blood concentration and anticonvulsant therapy were analyzed as potential factors affecting reduction of SEGA tumor volume. RESULTS:Significant reductions in SEGA volumes were noted at 3 and 6 months (median tumor volume 0.97 cm(3) and 0.70 cm(3) , respectively, versus 2.70 cm(3) at baseline, P = 0.001). Responses were observed in 11/15 (73.3%) and 10/12 (83.3%) patients at 3 and 6 months, respectively. The most rapid reduction of SEGA volume (58.6%) was found during the initial 3 months of treatment. There was no statistical difference in the extent of SEGA volume reduction between patients with everolimus trough levels <5 ng/ml and ≥5 ng/ml. Patients treated with ≤1 anticonvulsant had greater tumor reduction after 6 months of treatment. CONCLUSIONS:Everolimus is an effective and safe treatment option for TSC-related SEGA. Drug dose titration according to blood concentration did not appear to be crucial to achieve clinical efficacy; however, concomitant anticonvulsant therapy may affect response to mTOR inhibitors.

journal_name

Pediatr Blood Cancer

journal_title

Pediatric blood & cancer

authors

Trelinska J,Dachowska I,Kotulska K,Baranska D,Fendler W,Jozwiak S,Mlynarski W

doi

10.1002/pbc.25368

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

616-21

issue

4

eissn

1545-5009

issn

1545-5017

journal_volume

62

pub_type

临床试验,杂志文章
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    pub_type: 临床试验,杂志文章

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    pub_type: 临床试验,杂志文章,多中心研究

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    更新日期:2007-04-01 00:00:00

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    更新日期:2011-01-01 00:00:00

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    更新日期:2008-02-01 00:00:00

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    pub_type: 杂志文章

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