Publications by authors named "Yunfei An"

Deficiency in ELF4, X-linked (DEX) is a newly identified monogenic autoinflammatory disease. Most reported cases are male, leading to the recognition of DEX being primarily limited to male patients. Here we described 3 pediatric female patients with DEX from 3 unrelated families, who are all heterozygous for ELF4 mutations (c.

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  • T-cell receptor (TCR) diversity is essential for a strong immune response, but there's limited data on this diversity in children.
  • Researchers sequenced the TCRβ chain of 325 healthy Chinese kids, finding that TCRβ diversity decreases as they age, marked by more dominant clonotypes and changes in certain genetic sequences.
  • They also noted a link between lower TCRβ diversity and fewer naïve CD4 T cells, and created a predictive model that shows certain TCRβ characteristics could indicate biological age, offering valuable insights for pediatric immune research.
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Background: Recent studies in the field of lung cancer have emphasized the important role of body composition, particularly fatty tissue, as a prognostic factor. However, there is still a lack of practice in combining fatty tissue to discriminate benign and malignant pulmonary nodules.

Purpose: This study proposes a deep learning (DL) approach to explore the potential predictive value of dual imaging markers, including intrathoracic fat (ITF), in patients with pulmonary nodules.

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Many inborn errors of immunity may accompany secondary hemophagocytic lymphohistiocytosis (HLH), a condition typically characterized by impaired cytotoxic T and NK cell function. A considerable proportion of HLH cases also stem from chronic granulomatosis with phagocytic dysfunction. However, the development of secondary HLH in patients with severe congenital neutropenia (SCN) or cyclic neutropenia (CyN) with abnormal phagocytic cell counts has been less frequently reported.

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Background: WHIM syndrome is a rare, autosomal dominant inborn error of immunity characterized by warts, hypogammaglobulinemia, infection, and myelokathexis. It is caused mainly by heterozygous mutations at the C-terminus of the C-X-C chemokine receptor type 4 (CXCR4) gene.

Methods: We described the detailed clinical, genetic, immunological and treatment characteristic of four WHIM patients from a single Chinese family.

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Wiskott-Aldrich syndrome (WAS) is an X-linked immunodeficiency condition caused by ablation of functional WAS protein (WASP) expression, and associated with susceptibility to infections, eczema, and autoimmunity. Regulatory T cell (Treg) defects are an important cause of autoimmunity in WAS. Currently, the mechanisms underlying cytoskeleton involvement in Treg-regulated autoimmunity remain unclear, and WAS is an excellent model for investigation of this question.

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Background: Talaromyces marneffei (T. marneffei) is an opportunistic pathogen that causes endemic mycoses, which could lead to multiple organ damage. Talaromycosis is frequently disregarded as an early cautionary sign of immune system disorders in non-HIV-infected children.

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  • Pathogen infections are a major global public health issue, and bile acid (BA) metabolism plays a critical role in regulating host immunity and microbial infection.
  • The study investigated how viral (VSV) and bacterial (LPS) infections alter BA metabolism, revealing significant changes in circulating BA profiles, particularly an increase in taurine-conjugated BAs and a decrease in unconjugated BAs.
  • The research highlights the impact of infections on BA biosynthesis enzymes and their receptors, suggesting that targeting BA metabolism could potentially enhance innate immunity and help control infections.
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Background: Natural infection or vaccination have provided robust immune defense against SARS-CoV-2 invasion, nevertheless, Omicron variants still successfully cause breakthrough infection, and the underlying mechanisms are poorly understood.

Methods: Sequential blood samples were continuously collected at different time points from 252 volunteers who were received the CanSino Ad5-nCoV (n= 183) vaccine or the Sinovac CoronaVac inactivated vaccine (n= 69). The anti-SARS-CoV-2 prototype and Omicron BA.

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  • - The study aimed to create a deep learning model to differentiate between benign and malignant pulmonary nodules using CT images and mediastinal fat analysis.
  • - Patients were split into various groups for training and testing the model, which combined features from both nodules and surrounding fat to enhance predictive accuracy.
  • - Results showed that including mediastinal fat improved the model's performance significantly, making it a valuable tool for better diagnosis and patient care in lung health.
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Background: Macrophage activation syndrome (MAS) is a serve complication of juvenile idiopathic inflammatory myopathies (JIIMs). This study delineates the clinical manifestations and genetic underpinnings of JIIM-MAS patients.

Methods: We retrospectively analysed clinical and UNC13D gene from JIIM patients admitted to our centre between 2011 and 2021 to identify cases of MAS.

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Lipopolysaccharide (LPS)-responsive beige ankyrin (LRBA) gene mutations were first reported as the cause of immunodeficiency syndromes and autoimmunity in 2012. The majority of LRBA patients have multiple organ system involvement and a complex clinical phenotype. Herein we present a comprehensive account on the disease progression and transplantation procedure in a patient with LRBA deficiency who exhibited progressive autoimmune disease symptoms along with recurrent pulmonary infections since the age of 6 years old.

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  • The pre BCR complex is essential for B cell development, and mutations in CD79a and CD79b genes are linked to autosomal recessive agammaglobulinemia (ARA).
  • A patient with a homozygous CD79a mutation experienced several health issues, including recurrent infections, developmental delays, and neurological symptoms, due to the absence of B cells.
  • Whole exome sequencing identified a significant loss of heterozygosity involving CD79a, and the study suggests that a combination of intravenous immunoglobulin (IVIG) and fluoxetine can effectively manage chronic enteroviral meningitis in immunocompromised patients.
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  • STAT1 is a key protein involved in immune responses, and patients with STAT1 gain-of-function (GOF) mutations face increased susceptibility to chronic infections, particularly bacterial ones, despite having normal IgG levels.
  • A study involving eleven patients with different STAT1-GOF mutations confirmed these mutations through various laboratory methods, revealing a consistent increase in STAT1 protein levels and specific immune deficiencies.
  • The findings indicated that these mutations hinder the ability of B cells to produce effective antibodies, leading to recurrent infections, but regular intravenous immunoglobulin (IVIG) therapy proved beneficial in managing bacterial infections, even in patients with normal IgG levels.
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Background: Familial hemophagocytic lymphohistiocytosis type 3 (FHL3) is caused by UNC13D variants. The clinical manifestations of FHL3 are highly diverse and complex. Some patients exhibit atypical or incomplete phenotypes, making accurate diagnosis difficult.

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Diquat (DQ), paraquat (PQ), glufosinate (GLU), and glyphosate (GLYP) are commonly used herbicides that have been confirmed to be toxic to humans. Rapid and accurate measurements of these toxicants in clinical practice are beneficial for the correct diagnosis and timely treatment of herbicide-poisoned patients. The present study aimed to establish an efficient, convenient, and reliable method to achieve the simultaneous quantification of DQ, PQ, GLU, and GLYP in human plasma using liquid chromatography-tandem mass spectrometry (LC-MS/MS) without using derivatization or ion-pairing reagents.

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  • Scientists found that a protein called MS4A6D helps activate certain immune cells, called macrophages, which can cause inflammation in the body.
  • Mice without this protein showed less swelling in their feet after an injection that usually causes inflammation, meaning MS4A6D is important for that swelling to happen.
  • The study suggests that by controlling the activity of macrophages and a molecule called IL-1β, MS4A6D plays a big role in how inflammation progresses in mice.
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Food plays a vital role in human sustenance and well-being, and the fluctuations in its price exert a significant impact on the attainment of the Sustainable Development Goals (SDGs) from social, economic, and environmental perspectives. This paper conducts an analysis utilizing data from 163 countries, revealing that an upsurge in global food commodity prices entails trade-offs with 13 SDGs, while exhibiting synergies with a few others. By considering specific food products, various types of countries, and the supply and demand shocks, further analysis confirms predominantly negative associations between spikes in food prices and the SDGs.

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Purpose: Interferon-stimulated gene 15 (ISG15) deficiency, a rare human inborn error of immunity characterized by susceptibility to Bacillus Calmette-Guerin (BCG) diseases, neuropathic and dermatological manifestations.

Methods: The clinical and immunological features of two siblings with ISG15 deficiency combined with asymptomatic myeloperoxidase (MPO) mutations were analyzed, and their pathogenesis, as well as target therapeutic candidates, were explored.

Results: The manifestation in patient 2 was skin lesions, while those in patient 1 were intracranial calcification and recurrent pneumonia.

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  • Chronic allograft dysfunction (CAD) is a major reason for kidney transplant failure, and inflammation is a key factor in its development.
  • This study analyzed the effects of vitamin D (VD) supplementation on kidney transplant recipients (KTRs) suffering from chronic antibody-mediated rejection (CAMR) and found that VD helped reduce inflammatory cytokines.
  • Results indicated that KTRs receiving VD showed improved kidney function (higher eGFR levels) and decreased inflammation markers, highlighting vitamin D's role in protecting and maintaining graft function.
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Background: Sarcopenia is associated with a poor prognosis in patients with breast cancer (BC). Currently, there are few quantitative assessments carried out between muscle biomarkers and distant metastasis using existing methods.

Purpose: To assess the predictive value of the pectoralis muscle for BC distant metastasis, we developed a deep learning radiomics nomogram model (DLR-N) in this study.

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