PMID- 23978644 OWN - NLM STAT- MEDLINE DCOM- 20140919 LR - 20220330 IS - 2212-5353 (Electronic) IS - 2212-5345 (Linking) VI - 51 IP - 3 DP - 2013 Sep TI - Efficacy and safety of low-dose sirolimus for treatment of lymphangioleiomyomatosis. PG - 175-83 LID - S2212-5345(13)00040-3 [pii] LID - 10.1016/j.resinv.2013.03.002 [doi] AB - BACKGROUND: Lymphangioleiomyomatosis (LAM) is a rare disease caused by dysregulated activation of the mammalian target of rapamycin (mTOR). Sirolimus, an inhibitor of mTOR, has been reported to decrease the size of angiomyolipomas and stabilize pulmonary function in patients with LAM. However, the optimal dose for the treatment of LAM remains unclear. METHODS: We conducted a retrospective, observational study of 15 patients with LAM who underwent sirolimus therapy for more than 6 months. The efficacy was evaluated by reviewing the patients' clinical courses, pulmonary function and chest radiologic findings before and after the initiation of sirolimus treatment. RESULTS: All patients had blood trough levels of sirolimus lower than 5ng/mL. Sirolimus treatment improved the annual rates of change in FVC and FEV1 in the 9 patients who were free from chylous effusion (FVC, -101.0 vs. +190.0mL/y, p=0.046 and FEV1, -115.4 vs. +127.8mL/y, p=0.015). The remaining 7 patients had chylous effusion at the start of sirolimus treatment; the chylothorax resolved completely within 1-5 months of treatment in 6 of these cases. These results resembled those of previous studies in which blood trough levels of sirolimus ranged from 5 to 15ng/mL. CONCLUSIONS: Low-dose sirolimus (trough level, 5ng/mL or less) performed as well as the higher doses used previously for improving pulmonary function and decreasing chylous effusion in patients with LAM. CI - (c) 2013 The Japanese Respiratory Society. Published by Elsevier B.V. All rights reserved. FAU - Ando, Katsutoshi AU - Ando K AD - Division of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-Ku, Tokyo 113-8421, Japan. kando@juntendo.ac.jp FAU - Kurihara, Masatoshi AU - Kurihara M FAU - Kataoka, Hideyuki AU - Kataoka H FAU - Ueyama, Masako AU - Ueyama M FAU - Togo, Shinsaku AU - Togo S FAU - Sato, Teruhiko AU - Sato T FAU - Doi, Tokuhide AU - Doi T FAU - Iwakami, Shin-ichiro AU - Iwakami S FAU - Takahashi, Kazuhisa AU - Takahashi K FAU - Seyama, Kuniaki AU - Seyama K FAU - Mikami, Masashi AU - Mikami M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130530 PL - Netherlands TA - Respir Investig JT - Respiratory investigation JID - 101581124 RN - 0 (Antibiotics, Antineoplastic) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM CIN - Respir Investig. 2014 Jul;52(4):274-6. PMID: 24998376 MH - Adult MH - Antibiotics, Antineoplastic/*administration & dosage MH - Chylothorax/drug therapy/etiology MH - Female MH - Forced Expiratory Volume MH - Humans MH - Lung Neoplasms/complications/*drug therapy/genetics/physiopathology MH - Lymphangiomyoma/complications/*drug therapy/genetics/physiopathology MH - Male MH - Middle Aged MH - Molecular Targeted Therapy MH - Pleural Effusion, Malignant/drug therapy/etiology MH - Retrospective Studies MH - Sirolimus/*administration & dosage/blood MH - TOR Serine-Threonine Kinases MH - Treatment Outcome MH - Vital Capacity OTO - NOTNLM OT - Chylous effusion OT - Lymphangioleiomyomatosis OT - Sirolimus OT - mTOR inhibitor EDAT- 2013/08/28 06:00 MHDA- 2014/09/23 06:00 CRDT- 2013/08/28 06:00 PHST- 2012/11/30 00:00 [received] PHST- 2013/02/18 00:00 [revised] PHST- 2013/03/22 00:00 [accepted] PHST- 2013/08/28 06:00 [entrez] PHST- 2013/08/28 06:00 [pubmed] PHST- 2014/09/23 06:00 [medline] AID - S2212-5345(13)00040-3 [pii] AID - 10.1016/j.resinv.2013.03.002 [doi] PST - ppublish SO - Respir Investig. 2013 Sep;51(3):175-83. doi: 10.1016/j.resinv.2013.03.002. Epub 2013 May 30.