Publications by authors named "D Czech"

Importance: Intranasal corticosteroids (INCs) remain the first-line treatment of chronic rhinosinusitis (CRS) in both adults and children, despite the lack of evidence regarding their efficacy in the pediatric population. Similarly, their effect on the sinonasal microbiome has not been well documented.

Objective: To assess the clinical, immunological, and microbiological effects of 12 weeks of an INC in young children with CRS.

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To examine the relationship between college student anxiety, optimism, gratitude, and perception of the Physical Activity and Lifestyle program (PAL) instructional response/effectiveness following COVID-19. : Data were collected from a southeastern, midsize university ( = 1640) during April 2020. Participants responded to a Web-based survey that included mental health factors (optimism, gratitude, anxiety) and perceptions of COVID-19 academic response.

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Background: Innate immunity response to local dysbiosis seems to be one of the most important immunologic backgrounds of chronic rhinosinusitis (CRS) and concomitant asthma. We aimed to assess clinical determinants of upper-airway dysbiosis and its effect on nasal inflammatory profile and asthma risk in young children with CRS.

Methods: We recruited one hundred and thirty-three children, aged 4-8 years with doctor-diagnosed CRS with or without asthma.

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Gated ion transport across biological membranes is an intrinsic process regulated by protein channels. Synthetic anion carriers (anionophores) have potential applications in biological research; however, previously reported examples are mostly nonspecific, capable of mediating both electrogenic and electroneutral (nonelectrogenic) transport processes. Here we show the transmembrane Cl(-) transport studies of synthetic phenylthiosemicarbazones mimicking the function of acid-sensing (proton-gated) ion channels.

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Article Synopsis
  • The transport of anions across cell membranes is crucial, relying on specialized proteins, but few synthetic molecules mimic their gating behavior.
  • Researchers synthesized thiosquaramides and used various techniques to study their chloride binding and anion transport.
  • Results showed that these thiosquaramides are more acidic than their oxosquaramide counterparts, switching their anion transport abilities ON at lower pH and OFF at physiological pH (7.2) due to deprotonation.
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