text: Yo, check it out, I'm 'bout to spit some knowledge,
  'Bout the role of TGF beta1, in asthma and COPD,
  The airway remodeling, let me break it down,
  But I'ma do it in a style that's straight outta the town.
  
  TGF beta1, it's got a story untold,
  In asthma and COPD, it's not fully known,
  To understand its role, we did some tests,
  Immunohistochemical expression, put it to the test.
  
  We took bronchial biopsies, from patients with the conditions,
  Asthma and COPD, and some healthy individuals,
  Stained 'em with hematoxylin and eosin, and TGF beta1,
  To see if there's a difference, to see what's been done.
  
  And what we found was interesting, let me break it down,
  TGF beta1 was mainly found in the connective tissue, all around,
  The staining intensity, it didn't vary much,
  In the bronchial epithelium, it didn't clutch.
  
  But hold up, there's more, pay close attention,
  In the submucosa, the results showed a dimension,
  The staining intensity was higher in asthma, no doubt,
  But in COPD, it didn't show the same clout.
  
  So we can conclude, based on this observation,
  TGF beta1 may have a role in asthma's creation,
  But when it comes to COPD, it's a different situation,
  TGF beta1 ain't the key player in that formation.