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Уровни Сывороточного Il-4 И Экспрессия Его Рецептора На Т-Хелперах Периферической Крови Пациентов С Хронической Обструктивной Болезнью Легких

Уровни Сывороточного Il-4 И Экспрессия Его Рецептора На Т-Хелперах Периферической Крови Пациентов С Хронической Обструктивной Болезнью Легких

Abstract

Цель – изучить динамику сывороточного содержания IL-4 и уровня экспрессии его рецептора (IL-4R) на Т-хелперах (CD4+) периферической крови при прогрессировании хронической обструктивной болезни легких (ХОБЛ). В исследование были включены 112 пациентов с ХОБЛ стабильного течения: 36 человек с ХОБЛ I спирометрического класса (с. кл.), 52 человека с ХОБЛ II с. кл. и 24 человека с ХОБЛ III с. кл. В контрольную группу вошли 32 условно здоровых человека. Уровни IL-4, IL-6, IL-10, IL-17А, IFN-γ и TNF-α диагностировали в сыворотке крови методом проточной цитометрии, концентрации TGF-β1 и IL-21 измеряли методом иммуноферментного анализа. На основании соотношения цитокинов были выявлены типы Т-хелперного ответа. Определение количества CD4+, экспрессирующих IL-4R, в крови больных ХОБЛ и здоровых лиц проводили методом проточной цитометрии. Согласно полученным данным, концентрация IL-4 в крови больных ХОБЛ оставалась ниже контрольного значения на всех стадиях заболевания вне зависимости от типа Тh иммунного ответа. Однако, по мере прогрессирования ХОБЛ наблюдалось повышение сывороточного уровня IL-4. Было выявлено, что количество CD4+-клеток, экспрессирующих IL-4R, оставалось ниже контрольного значения на всех стадиях ХОБЛ. Низкое количество CD4+CD124+-клеток в крови пациентов на всех стадиях ХОБЛ, несмотря на рост концентрации IL-4 по мере прогрессирования заболевания, свидетельствует о подавлении IL-4 сигналинга на Т-хелперах. Мы предполагаем, что это связано с деградацией рецептора и является компенсаторным механизмом, направленным на ограничение воспалительного процесса. При ХОБЛ происходит увеличение концентрации сывороточного IL-4 в сочетании с понижением уровня экспрессии IL-4R на Т-хелперах, что отражает снижение их отвечаемости. The aim is to study the dynamics of serum IL-4 content and the level of expression of its receptor (IL-4R) on peripheral blood T-helper (CD4+) in the progression of chronic obstructive pulmonary disease (COPD). The study included 112 patients with stable COPD: 36 people with COPD of I spirometric class (s. c.), 52 patients with COPD of II s. c. and 24 people with COPD of III s. c. The control group included 32 conditionally healthy people. Levels of IL-4, IL-6, IL-10, IL-17A, IFN-γ and TNF-α were diagnosed in blood serum by flow cytometry, concentrations of TGF-β1 and IL-21 were measured by enzyme immunoassay. Types of T-helper response were identified based on the ratio of cytokines. The determination of the number of CD4+, that express IL-4R, in blood of COPD patients and healthy people was performed by flow cytometry. According to the obtained data, IL-4 concentration in the blood of COPD patients remained below the control value at all stages of the disease, regardless of Th type immune response. However, there was an increase in the serum level of IL-4 as COPD progresses. It was found that the number of CD4+ cells expressing IL-4R remained below the control value at all stages of COPD. A low number of CD4+CD124+ cells in the blood of patients at all stages of COPD, despite the increase in IL-4 concentration as the disease progresses, indicates the inhibition of IL-4 signaling on T-helper cells. We assume that it is due to the degradation of the receptor and it is a compensatory mechanism aimed at limiting the inflammatory process. There is an increase in serum IL-4 concentration in combination with a decrease in the expression level of IL-4R on T-helper cells in COPD, it is reflected in a decrease in responsiveness these cells.

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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