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Valladares KN, Jones LI, Barnes JW, Krick S. Highly Effective Modulator Therapy: Implications for the Microbial Landscape in Cystic Fibrosis. Int J Mol Sci 2024; 25:11865. [PMID: 39595943 PMCID: PMC11594123 DOI: 10.3390/ijms252211865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2024] [Revised: 10/28/2024] [Accepted: 11/02/2024] [Indexed: 11/28/2024] Open
Abstract
Cystic fibrosis (CF) is an autosomal recessive multisystem disorder caused by mutations in the cystic fibrosis conductance regulator (CFTR) anion channel. In the lungs specifically, CFTR mutations lead to changes in mucus viscosity and defective mucociliary clearance. Moreover, people with CF (pwCF) mount an insufficient immune response to invading pathogens, which predisposes individuals to chronic airway disease associated with chronic inflammation, colonization, and recurrent infections by mainly opportunistic pathogens. These chronic infections in the CF lung are typically polymicrobial and frequently harbour multidrug-resistant pathogens, making both treatment and eradication very challenging. During the last decade, the development of highly effective CFTR modulator therapy (HEMT) has led to a breakthrough in treatment options for pwCF. While the majority of pwCF now live longer and have fewer CF exacerbations, colonisation with common respiratory pathogens persists, thereby contributing to chronic inflammation and infection. Interestingly, there are limited reports examining the lung microbiome in the post-modulator era. Since ETI treatment is still quite novel and has only been used for about five years by now, this review will be one of the first discussing the current literature on the effect of ETI on CF pathogens. In addition, we will identify unanswered questions that remain from the effect of HEMT on the CF microbiome.
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Affiliation(s)
- Kristina N. Valladares
- Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.N.V.); (J.W.B.)
| | - Luke I. Jones
- Division of Pulmonary, Allergy and Critical Care Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA;
- Medical Scientist Training Program, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Jarrod W. Barnes
- Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.N.V.); (J.W.B.)
- Division of Pulmonary, Allergy and Critical Care Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Stefanie Krick
- Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.N.V.); (J.W.B.)
- Division of Pulmonary, Allergy and Critical Care Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA;
- Medical Scientist Training Program, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Peng L, Ma R, Li Y, Cheng J. Mycobacterium gordoniasis of the cervical lymph nodes: A case report. World J Clin Cases 2024; 12:3995-4002. [PMID: 38994281 PMCID: PMC11235456 DOI: 10.12998/wjcc.v12.i19.3995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/26/2024] [Accepted: 05/22/2024] [Indexed: 06/29/2024] Open
Abstract
BACKGROUND Owing to the advancement in bacterial identification techniques, the detection rate of non-tuberculous mycobacterium (NTM) has been on the rise. Different from Mycobacterium tuberculosis, the clinical symptoms of NTM are not easily detected, and the clinical efficacy and prognosis are somewhat heterogeneous. To report a case of Mycobacterium gordoniasis of cervical lymph node diagnosed in Anhui Chest Hospital in July 2022. CASE SUMMARY Upon examination, the patient who weighed 67.5 kg, was human immunodeficiency virus negative, healthy, without hypertension, diabetes, heart disease and other basic diseases microscopic analysis revealed granulomatous inflammation with coagulation necrosis in the lymphocyte, and tuberculosis was not ruled out. Plain computed tomography scans of the neck and chest indicated the presence of a single grayish-yellow and grayish-brown tissue, the dimensions of which was top of form 10.5 cm × 3.0 cm × 1.5 cm. After pathological consultation in our hospital, the diagnosis was confirmed as NTM infection. CONCLUSION This case report and the clinical epidemiological research on improving NTM have important guiding significance for improving decision-making in clinical treatments.
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Affiliation(s)
- Ling Peng
- Department of Tuberculosis, Anhui Provincial Chest Hospital, Hefei 230022, Anhui Province, China
| | - Rong Ma
- Department of Tuberculosis, Anhui Provincial Chest Hospital, Hefei 230022, Anhui Province, China
| | - Yong Li
- Department of Tuberculosis, Anhui Provincial Chest Hospital, Hefei 230022, Anhui Province, China
| | - Jie Cheng
- Department of Tuberculosis, Anhui Provincial Chest Hospital, Hefei 230022, Anhui Province, China
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Hong E, Zampoli M, Beringer PM. Pharmacokinetic Enhancement of Elexacaftor/Tezacaftor/Ivacaftor for Cystic Fibrosis: A Cost Reduction Strategy to Address Global Disparities in Access. Clin Pharmacol Ther 2024; 115:1204-1207. [PMID: 38385853 DOI: 10.1002/cpt.3214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/01/2024] [Indexed: 02/23/2024]
Affiliation(s)
- Eunjin Hong
- College of Pharmacy, CHA University, Seongnam-si, South Korea
| | - Marco Zampoli
- Department of Paediatrics and Child Health, Red Cross War Memorial Children's Hospital, Cape Town, South Africa
| | - Paul M Beringer
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, California, USA
- USC Anton Yelchin CF Clinic, Los Angeles, California, USA
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Hong E, Parsons SM, Sass L, Epstein C, Chan L, Brown C, Eshaghian PH, Beringer PM. Preliminary evidence for sustained efficacy of CFTR modulator therapy with concomitant rifabutin administration. J Cyst Fibros 2024; 23:519-523. [PMID: 38036321 DOI: 10.1016/j.jcf.2023.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 10/22/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
The concomitant use of elexacaftor/tezacaftor/ivacaftor (ETI) and strong CYP3A inducers including rifampin and rifabutin is not recommended due to the risk of drug-drug interactions (DDI). This presents a significant challenge to the treatment of non-tuberculous mycobacteria precluding the first line treatment. While rifabutin induces CYP3A activity, its effect appears to be moderate compared to rifampin. In this study, we investigated three cases in which concomitant use of rifabutin and CFTR modulators (ETI or ivacaftor monotherapy) was used, and these cases suggest that addition of rifabutin did not compromise the efficacy of ETI or ivacaftor as evidenced by pulmonary function and sweat chloride testing. A full physiologically based pharmacokinetic model predicted lung concentrations of ETI upon rifabutin coadministration to exceed the half-maximal effective concentrations (EC50) determined from chloride transport in phe508del human bronchial epithelial cells. This study provides preliminary evidence in support of the use of rifabutin in patients receiving ETI.
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Affiliation(s)
- Eunjin Hong
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, United States; College of Pharmacy, CHA University, 335 Pangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13488, South Korea
| | - Sarah M Parsons
- Children's Hospital of The King's Daughters, 601 Children's Ln, Norfolk, VA 23507, United States
| | - Laura Sass
- Children's Hospital of The King's Daughters, 601 Children's Ln, Norfolk, VA 23507, United States
| | - Cynthia Epstein
- Children's Hospital of The King's Daughters, 601 Children's Ln, Norfolk, VA 23507, United States
| | - Lynn Chan
- Department of Pharmaceutical Services, University of California Los Angeles, 757 Westwood Plaza, Los Angeles, CA 90095, United States
| | - Claire Brown
- Division of Infectious Diseases, University of California Los Angeles, 757 Westwood Plaza, Los Angeles, CA 90095, United States
| | - Patricia H Eshaghian
- Division of Pulmonary and Critical Care Medicine, University of California Los Angeles, 1260 15(th) St #600, Santa Monica, CA 90404, United States
| | - Paul M Beringer
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, United States; USC Anton Yelchin CF Clinic, 1510 San Pablo St, Los Angeles, CA 90033, United States.
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Hong E, Carmanov E, Shi A, Chung PS, Rao AP, Forrester K, Beringer PM. Application of Physiologically Based Pharmacokinetic Modeling to Predict Drug-Drug Interactions between Elexacaftor/Tezacaftor/Ivacaftor and Tacrolimus in Lung Transplant Recipients. Pharmaceutics 2023; 15:pharmaceutics15051438. [PMID: 37242680 DOI: 10.3390/pharmaceutics15051438] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 04/28/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
Elexacaftor/tezacaftor/ivacaftor (ETI) treatment has potential benefits in lung transplant recipients, including improvements in extrapulmonary manifestations, such as gastrointestinal and sinus disease; however, ivacaftor is an inhibitor of cytochrome P450 3A (CYP3A) and may, therefore, pose a risk for elevated systemic exposure to tacrolimus. The aim of this investigation is to determine the impact of ETI on tacrolimus exposure and devise an appropriate dosing regimen to manage the risk of this drug-drug interaction (DDI). The CYP3A-mediated DDI of ivacaftor-tacrolimus was evaluated using a physiologically based pharmacokinetic (PBPK) modeling approach, incorporating CYP3A4 inhibition parameters of ivacaftor and in vitro enzyme kinetic parameters of tacrolimus. To further support the findings in PBPK modeling, we present a case series of lung transplant patients who received both ETI and tacrolimus. We predicted a 2.36-fold increase in tacrolimus exposure when co-administered with ivacaftor, which would require a 50% dose reduction of tacrolimus upon initiation of ETI treatment to avoid the risk of elevated systemic exposure. Clinical cases (N = 13) indicate a median 32% (IQR: -14.30, 63.80) increase in the dose-normalized tacrolimus trough level (trough concentration/weight-normalized daily dose) after starting ETI. These results indicate that the concomitant administration of tacrolimus and ETI may lead to a clinically significant DDI, requiring the dose adjustment of tacrolimus.
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Affiliation(s)
- Eunjin Hong
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, USA
| | - Eugeniu Carmanov
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, USA
| | - Alan Shi
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, USA
| | - Peter S Chung
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Keck School of Medicine, University of Southern California, 1975 Zonal Ave, Los Angeles, CA 90033, USA
- USC Anton Yelchin CF Clinic, 1510 San Pablo St, Los Angeles, CA 90033, USA
| | - Adupa P Rao
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Keck School of Medicine, University of Southern California, 1975 Zonal Ave, Los Angeles, CA 90033, USA
- USC Anton Yelchin CF Clinic, 1510 San Pablo St, Los Angeles, CA 90033, USA
| | - Kevin Forrester
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, USA
| | - Paul M Beringer
- Department of Clinical Pharmacy, Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Ave, Los Angeles, CA 90033, USA
- USC Anton Yelchin CF Clinic, 1510 San Pablo St, Los Angeles, CA 90033, USA
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Hong E, Shi A, Beringer P. Drug-drug interactions involving CFTR modulators: a review of the evidence and clinical implications. Expert Opin Drug Metab Toxicol 2023; 19:203-216. [PMID: 37259485 DOI: 10.1080/17425255.2023.2220960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/30/2023] [Indexed: 06/02/2023]
Abstract
INTRODUCTION Cystic fibrosis (CF) is characterized by mucus accumulation impairing the lungs, gastrointestinal tract, and other organs. Cystic fibrosis transmembrane conductance regulator (CFTR) modulators (ivacaftor, tezacaftor, elexacaftor, and lumacaftor) significantly improve lung function and nutritional status; however, they are substrates, inhibitors, and/or inducers of certain CYP enzymes and transporters, raising the risk of drug-drug interactions (DDI) with common CF medications. AREAS COVERED A literature search was conducted for DDIs involving CFTR modulators by reviewing new drug applications, drug package inserts, clinical studies, and validated databases of substrates, inhibitors, and inducers. Clinically, CYP3A inducers and inhibitors significantly decrease and increase systemic concentrations of elexacaftor/tezacaftor/ivacaftor, respectively. Additionally, lumacaftor and ivacaftor alter concentrations of CYP3A and P-gp substrates. Potential DDIs without current clinical evidence include ivacaftor and elexacaftor's effect on CYP2C9 and OATP1B1/3 substrates, respectively, and OATP1B1/3 and P-gp inhibitors' effect on tezacaftor. A literature review was conducted using PubMed. EXPERT OPINION Dosing recommendations for CFTR modulators with DDIs are relatively comprehensive; however, recommendations on timing of dosing transition of CFTR modulators when CYP3A inhibitors are initiated or discontinued is incomplete. Certain drug interactions may be managed by choosing an alternative treatment to avoid/minimize DDIs. Next generation CFTR modulator therapies under development are expected to provide increased activity with reduced DDI risk.
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Affiliation(s)
- Eunjin Hong
- Department of Clinical Pharmacy, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, USA
| | - Alan Shi
- Department of Clinical Pharmacy, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, USA
| | - Paul Beringer
- Department of Clinical Pharmacy, USC Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, USA
- USC Anton Yelchin CF Clinic, Los Angeles, CA, USA
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Tümmler B. Post-approval studies with the CFTR modulators Elexacaftor-Tezacaftor-Ivacaftor. Front Pharmacol 2023; 14:1158207. [PMID: 37025483 PMCID: PMC10072268 DOI: 10.3389/fphar.2023.1158207] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/07/2023] [Indexed: 03/31/2023] Open
Abstract
Triple combination therapy with the CFTR modulators elexacaftor (ELX), tezacaftor (TEZ) and ivacaftor (IVA) has been qualified as a game changer in cystic fibrosis (CF). We provide an overview of the body of literature on ELX/TEZ/IVA published between November 2019 and February 2023 after approval by the regulators. Recombinant ELX/TEZ/IVA-bound Phe508del CFTR exhibits a wild type conformation in vitro, but in patient's tissue a CFTR glyoisoform is synthesized that is distinct from the wild type and Phe508del isoforms. ELX/TEZ/IVA therapy improved the quality of life of people with CF in the real-life setting irrespective of their anthropometry and lung function at baseline. ELX/TEZ/IVA improved sinonasal and abdominal disease, lung function and morphology, airway microbiology and the basic defect of impaired epithelial chloride and bicarbonate transport. Pregnancy rates were increasing in women with CF. Side effects of mental status changes deserve particular attention in the future.
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Affiliation(s)
- Burkhard Tümmler
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research, Hannover Medical School, Hannover, Germany
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