Journal List > Infect Chemother > v.42(3) > 1035000

Kim, Lee, Choi, Kwon, Park, Choi, Yoo, Lee, Cho, Kim, Lee, Kim, Min, Cho, Kim, Lee, Min, and Park: Efficacy and Safety of Micafungin for Prophylaxis of Invasive Fungal Infection in Hematopoietic Stem Cell Transplantation Recipients

Abstract

Background

Micafungin, a potent inhibitor of 1,3-β-D-glucan synthase, is a novel antifungal agent of the echinocandin class. In vitro study showed that micafungin was effective against Aspergillus species as well as Candida species, but clinical data on the prophylactic efficacy against invasive fungal infections (IFIs) other than candidiasis are still lacking.

Materials and Methods

We identified 60 consecutive adult hematopoietic stem cell transplantation (HSCT) recipients who received at least 3 doses of micafungin during neutropenic period. Micafungin was started as an alternative in patients who were intolerant or had adverse events (AEs) to primary prophylactic antifungal agents. We retrospectively reviewed the medical records and analyzed the efficacy and safety of micafungin for prophylaxis against IFIs.

Results

The patients either had autologous (n=9) or allogeneic (n=51: 1 syngeneic, 24 sibling, 26 unrelated donor) HSCT. Itraconazole oral solution (n=58) was the most frequently used first line antifungal agent for prophylaxis and was administered for median 11 days. The most frequent cause of switch to micafungin was vomiting (n=42). The duration of neutropenia and micafungin administration was median 13 and 12 days, respectively. A successful outcome was achieved in 45 (75%) patients. Empirical antifungal therapy was initiated in 13 (22%) patients. There were 2 cases (3.3%) of breakthrough fungal infections which comprised a probable invasive pulmonary aspergillosis and a possible invasive fungal sinusitis. There was no case of invasive candidiasis. A total of 53 (88%) patients experienced at least one AE regardless of causality during micafungin administration. The most frequent AEs were hypokalemia, vomiting, diarrhea, and elevated serum aspartate aminotransferase or alanine aminotransferase. Among the aforementioned AEs, only 1 case of diarrhea could be classified as a probable relation with micafungin when causality was assessed. There was no AEs that caused discontinuation of micafungin.

Conclusions

Micafungin seems to be a safe and effective agent for prophylaxis of IFIs including aspergillosis as well as candidiasis in HSCT recipients. However, further large, prospective, and randomized comparative studies are warranted for aspergillosis.

Figures and Tables

Table 1
Demographic and Clinical Characteristics of Study Subjects
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*Others include chronic myelogenous leukemia (n=1) and chronic lymphocytic leukemia (n=1).

HSCT, hematopoietic stem cell transplantation.

Table 2
Transplantation Procedures of the 51 Allogeneic HSCT Recipients
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*Defined and graded according to the standard criteria (14).

HLA, human leukocyte antigen.

Table 3
Summary of Drug Adverse Events
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*Adverse events were graded according to the National Cancer Institute Common Terminology Criteria of Adverse Events version 3.0.

The probability of adverse drug reactions were defined by Naranjo probability scale.

ALT, alanine aminotransferase; ALP, alkaline phosphatase; AST, aspartate aminotransferase; Cr, creatinine; GGP, γ-glutamyl transpeptidase; LFTs, liver function tests; TB, total bilirubin.

Table 4
Clinical Data from Reports of Patients Undergoing Hematopoietic Stem Cell Transplantation with Micafungin Prophylaxis during Neutropenia
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*'Empirical therapy' means the use of systemic antifungal agents for treatment of suspected fungal infections in patients with fever persisted for >96 h during the neutropenic phase despite broad-spectrum antibacterial therapy.

'Breakthrough IFI' means the development of proven or probable invasive fungal infections defined by the EORTC/MSG in 2002 (33) during the administration of micafungin, except for in the study by Choi et al that counted possible cases in.

P=0.024

Allo-HSCT, allogeneic hematopoietic stem cell transplantation; IFI, invasive fungal infection; IV, intravenous; No., numbers of patients.

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Dong-Gun Lee
https://orcid.org/http://orcid.org/0000-0003-4655-0641

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