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  • Title: Effectiveness of Amikacin liposome inhalation suspension for refractory Mycobacterium avium complex pulmonary disease at 6 months post initiation.
    Author: Urabe N, Sakamoto S, Tokita N, Yoshida H, Usui Y, Shimizu H, Sekiya M, Miyoshi S, Nakamura Y, Isobe K, Kishi K.
    Journal: BMC Pulm Med; 2024 Sep 10; 24(1):442. PubMed ID: 39256717.
    Abstract:
    BACKGROUND: Amikacin  liposome inhalation suspension (ALIS) improved sputum culture conversion rate at 6 months for patients with refractory Mycobacterium avium complex pulmonary disease (MAC-PD) in an international phase 3 trial. Patient characteristics and chest high-resolution CT (HRCT) findings associated with ALIS effectiveness are poorly documented. OBJECTIVE: We aimed to clarify ALIS effectiveness for refractory MAC-PD at 6 months, elucidating associated patient characteristics and chest CT findings. METHODS: We reviewed medical records of 12 patients with refractory MAC-PD for whom ALIS treatment was initiated at Toho University Omori Medical Center from November 2021 through September 2022. All patients demonstrated treatment persistence for at least 3 months. They were divided into culture conversion and non-conversion groups using sputum culture conversion status after 6-month ALIS treatment initiation. Clinical and radiological characteristics were compared. RESULTS: Seven of the 12 patients (58.3%) achieved sputum culture conversion within 6 months. The culture conversion group had shorter pre-ALIS initiation treatment duration [21 months (16-25) vs. 62 months (32-69); p = 0.045]; lower cavitary lesion incidence on HRCT (28.6% vs. 100%; p = 0.028); and fewer clarithromycin (CLA)-resistant strains [0/7 (0%) vs. 3/5 (60%); p = 0.045]. Chest HRCT findings improved in 4 of 7 (57.1%) and 1 of 5 (20%) patients in the culture conversion and non-conversion groups, respectively. CONCLUSION: ALIS facilitated sputum culture conversion within 6 months in 58.3% of patients with refractory MAC-PD. Sputum culture conversion was significantly more frequent for CLA-susceptible strains and patients with fewer cavitary lesions. Improved CT findings after ALIS did not always correspond to sputum culture conversion.
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