Introduction: Antimitochondrial antibodies are autoantibodies detected in 90% of primary biliary cirrhosis (PBC) patients. Some PBC cases are complicated by myositis, which is difficult to confirm due to minimal histological evidence of inflammation in limb muscles.
Methods: Our aim was to determine the extent of inflammatory changes in a truncal muscle biopsy specimen from a PBC patient.
Results: A 48-year-old woman with a 5-year history of atrial fibrillation and chronic heart failure was evaluated for elevated serum creatine kinase level. Antimitochondrial M2 antibodies were detected, and PBC was diagnosed. A biceps brachii biopsy specimen showed mild, non-specific myogenic changes; a second biopsy was performed on the rectus abdominis muscle, which showed typical inflammatory changes. Myositis with antimitochondrial M2 antibodies was confirmed.
Conclusions: In myositis patients with antimitochondrial M2 antibodies, muscles of the extremities are involved to a lesser extent. Radiological and histological examination focusing on truncal muscles, including a biopsy, is important.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/mus.23730 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Antibodies directed against bacterial antigens in sera of Polish patients with primary biliary cholangitis.
Front Cell Infect Microbiol
January 2025
Clinic of Polish Gastroenterology Foundation, Warsaw, Poland.
Background: Primary biliary cholangitis (PBC) is a cholestatic, autoimmune liver disease with the presence of characteristic autoantibodies. The aim of the work was to determine the level of antibodies directed against bacterial antigens: (anti-anti), (anti-), (anti- ) and () in sera of PBC patients. We also performed studies on the impact of the bacterial peptides on the specific antigen-antibody binding.
View Article and Find Full Text PDFComparison of Clinical and Pathologic Features of Antimitochondrial Antibodies-negative Primary Biliary Cirrhosis and Cholestatic Type Drug-induced Liver Injury.
J Clin Gastroenterol
December 2024
Department of Infectious Diseases, The First Affiliated Hospital of Nanchang University, Nanchang, China.
Aim: To compare the respective clinical and pathologic features of antimitochondrial antibodies-negative (AMA-negative) primary biliary cirrhosis (PBC) and cholestatic type drug-induced liver injury (DILI) for clinical differential diagnosis.
Patients And Methods: Clinical data from 23 patients with AMA-negative PBC and 39 patients with cholestatic type DILI, treated at our hospital between January 2013 and January 2024, were collected and retrospectively analyzed.
Results: The cholestatic type DILI group exhibited a higher incidence of malaise and abdominal pain compared with the AMA-negative PBC group.
Prediction of primary biliary cholangitis among health check-up population with anti-mitochondrial M2 antibody positive.
Clin Mol Hepatol
December 2024
Department of Clinical Laboratory, State key Laboratory of Complex, Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China.
Background: Anti-mitochondrial M2 antibody (AMA-M2) is a specific marker for primary biliary cholangitis (PBC) and it could be also presented in non-PBC individuals.
Methods: A total of 72173 Chinese health check-up individuals tested AMA-M2, of which non-PBC AMA-M2 positive individuals were performed follow-up. Baseline data of both clinical characteristics and laboratory examinations were collected in all AMA-M2-positive individuals.
Primary biliary cholangitis: Personalizing second-line therapies.
Hepatology
November 2024
Department of Medicine, Division of Gastroenterology and Hepatology, University of California Davis School of Medicine, Sacramento, California, USA.
Article Synopsis
- Primary biliary cholangitis (PBC) is an autoimmune disease primarily affecting middle-aged women, characterized by damage to small bile ducts, leading to liver issues like cholestasis and cirrhosis.
- The main treatment for PBC has been ursodeoxycholic acid, which helps slow disease progression but doesn't alleviate symptoms; new second-line therapies are being developed for patients who don't respond well.
- Recent medications like obeticholic acid, elafibranor, and seladelpar show promise in improving liver function and reducing cholestasis, while considerations for personalized treatment based on patient features are essential.
Successful management of immunotherapy-resistant respiratory failure in anti-mitochondrial M2 antibody-positive myositis by modified lung volume recruitment therapy: A case report.
Medicine (Baltimore)
December 2024
Department of Neurology, Showa University Fujigaoka Hospital, Yokohama, Kanagawa, Japan.
Rationale: Anti-mitochondrial antibodies (AMA) M2-positive myositis can lead to severe respiratory failure. Traditional immunotherapies sometimes fail to address respiratory failure. Herein, this CARE-compliant case report described a patient with AMA-M2-positive myositis who recovered from ventilation with tracheostomy owing to immunotherapy-resistant respiratory failure to spontaneous breathing after modified lung volume recruitment (mLVR) therapy.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!