Cellular clocks in hyperoxia effects on [Ca(2+)](i) regulation in developing human airway smooth muscle
| Autor: | Christina M. Pabelick, Aleksey V. Matveyenko, Y. S. Prakash, Colleen M. Bartman |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Pulmonary and Respiratory Medicine Male Physiology Airway hyperresponsiveness Bronchi Hyperoxia 03 medical and health sciences 0302 clinical medicine Fetus Smooth muscle Physiology (medical) Circadian Clocks medicine Animals Humans Cells Cultured Asthma Cell Proliferation Childhood asthma business.industry Infant Newborn Muscle Smooth Cell Biology Airway smooth muscle Human airway respiratory system medicine.disease Airway hyperreactivity respiratory tract diseases Mice Inbred C57BL Oxygen 030104 developmental biology Immunology Calcium Female medicine.symptom Bronchial Hyperreactivity business 030217 neurology & neurosurgery Research Article |
| Zdroj: | Am J Physiol Lung Cell Mol Physiol |
| Popis: | Supplemental O2 (hyperoxia) is necessary for preterm infant survival but is associated with development of bronchial airway hyperreactivity and childhood asthma. Understanding early mechanisms that link hyperoxia to altered airway structure and function are key to developing advanced therapies. We previously showed that even moderate hyperoxia (50% O2) enhances intracellular calcium ([Ca2+]i) and proliferation of human fetal airway smooth muscle (fASM), thereby facilitating bronchoconstriction and remodeling. Here, we introduce cellular clock biology as a novel mechanism linking early oxygen exposure to airway biology. Peripheral, intracellular clocks are a network of transcription-translation feedback loops that produce circadian oscillations with downstream targets highly relevant to airway function and asthma. Premature infants suffer circadian disruption whereas entrainment strategies improve outcomes, highlighting the need to understand relationships between clocks and developing airways. We hypothesized that hyperoxia impacts clock function in fASM and that the clock can be leveraged to attenuate deleterious effects of O2 on the developing airway. We report that human fASM express core clock machinery ( PER1, PER2, CRY1, ARNTL/BMAL1 , CLOCK) that is responsive to dexamethasone (Dex) and altered by O2. Disruption of the clock via siRNA-mediated PER1 or ARNTL knockdown alters store-operated calcium entry (SOCE) and [Ca2+]i response to histamine in hyperoxia. Effects of O2 on [Ca2+]i are rescued by driving expression of clock proteins, via effects on the Ca2+ channels IP3R and Orai1. These data reveal a functional fASM clock that modulates [Ca2+]i regulation, particularly in hyperoxia. Harnessing clock biology may be a novel therapeutic consideration for neonatal airway diseases following prematurity. |
| Databáze: | OpenAIRE |
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