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Control Interventions Can Impact Alveolarization and the Transcriptome in Developing Mouse Lungs.

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Control interventions commonly used in lung development studies, such as antagomiRs and tamoxifen, significantly alter lung structure and gene expression in mouse pups. These findings highlight the need for careful selection of controls in research on lung alveolarization.

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Area of Science:

  • Developmental biology
  • Pulmonary research
  • Pharmacology

Background:

  • Understanding lung alveolarization is crucial, especially for conditions like bronchopulmonary dysplasia in preterm infants.
  • Control interventions are vital for validating findings in lung development studies.
  • The impact of these controls on lung development is not fully understood.

Purpose of the Study:

  • To investigate the effects of common control interventions on lung structure and transcriptome in developing mice.
  • To assess the impact of antagomiRs, saline, and tamoxifen-related compounds on lung development.

Main Methods:

  • Parenteral administration of antagomiRs, isotonic saline, Miglyol, and tamoxifen in C57Bl/6J mouse pups.
  • Analysis of lung structure (volume, septal thickness, alveolarization).
  • Examination of the lung transcriptome using mRNA sequencing.

Main Results:

  • AntagomiRs affected lung volume, septal thickness, and transcriptome.
  • Isotonic saline altered lung volume with minimal transcriptomic impact.
  • Tamoxifen and its solvent Miglyol significantly impacted pup growth, lung development, and gene expression.

Conclusions:

  • Widely used control interventions can directly influence lung alveolarization and the lung transcriptome.
  • Careful consideration and validation of control interventions are necessary in lung development research.
  • These findings have implications for the interpretation of studies on lung development mechanisms.