Publications by authors named "Ayca Demir"

Background: Diagnosing anaphylaxis in children within the first 2 years of life can be difficult due to the often confusing and nonspecific signs and symptoms.

Objective: This study focuses on the phenotype of anaphylaxis in children within the first 2 years of life and aims to increase awareness of anaphylaxis in this age group.

Methods: The study included children between 0 and 2 years who were diagnosed as having anaphylaxis by pediatric allergists in 11 tertiary hospitals.

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Introduction: Ocrelizumab is a CD20-targeting monoclonal antibody used for treatment of multiple sclerosis (MS). Serum and cerebrospinal fluid (CSF) neurofilament light (NFL) chain levels are reduced in MS patients under ocrelizumab treatment indicating a preventive action against neuro-axonal degeneration. Our aim, in this preliminary study, was to explore the impact of ocrelizumab treatment on synaptic integrity through assessment of neurogranin levels.

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A 4-year-old boy presented with acute-onset autoimmune cytopenia with severe, persistent lymphopenia, autoimmune thyroiditis, elevated IgE and glucose 6-phosphate dehydrogenase enzyme deficiency. In immunologic evaluation, lower T, B and natural killer cells and higher levels of adenosine deaminase (ADA) metabolites were observed. The compound heterozygous novel gene mutations causing ADA deficiency were detected.

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In 15 Turkish LAD-1 patients and controls, we assessed the impact of pathogenic ITGB2 mutations on Th17/Treg differentiation and functions, and innate lymphoid cell (ILC) subsets. The percentage of peripheral blood Treg cells, in vitro-generated induced Tregs differentiated from naive CD4 T cells were decreased despite the elevated absolute counts of CD4 cells in LAD-1 patients. Serum IL-23 levels were elevated in LAD-1 patients.

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Mucormycosis is a rare but serious opportunistic fungal disease characterized by rhino-orbito-cerebral and pulmonary involvement. It is mainly seen in people with secondary immunosuppression, isolated vitamin A deficiency, measles, and AIDS patients. It showed a rise during the second wave of the COVID-19 epidemic in the spring of 2021 in India, especially in diabetic COVID-19 patients.

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Article Synopsis
  • The COVID-19 pandemic was caused by the SARS-CoV-2 virus, but other human coronaviruses also exist and have a historical context with pandemics like smallpox and influenza.
  • The immune system consists of innate and adaptive responses, involving various types of immune cells and proteins (e.g., CD markers, MHCs, interleukins, and chemokines) that help clear pathogens and regulate infections.
  • Advances in single-cell sequencing and lab techniques are enhancing our understanding of immune cell functions, which may also relate to autoimmune conditions and the interaction of viral/bacterial infections with the immune response.
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Over the past decades, significant progress has been made in targeted cancer therapy. In precision oncology, molecular profiling of cancer patients enables the use of targeted cancer therapeutics. However, current diagnostic methods for molecular analysis of cancer are costly and require sophisticated equipment.

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