Chiba Y, Tanabe M, Goto K, Sakai H, Misawa M Down-regulation of miR-133a contributes to up-regulation of Rhoa in bronchial smooth muscle cells. Am J Respir Crit Care Med. 2009 Oct 15;180(8):713-9. doi: 10.1164/rccm.200903-0325OC. Epub 2009 Jul 30.
Feng MJ, Shi F, Qiu C, Peng WK MicroRNA-181a, -146a and -146b in spleen CD4+ T lymphocytes play proinflammatory roles in a murine model of asthma. Int Immunopharmacol. 2012 Jul;13(3):347-53. doi: 10.1016/j.intimp.2012.05.001. Epub 2012 May 10.
Kumar M, Mabalirajan U, Agrawal A, Ghosh B Proinflammatory role of let-7 miRNAs in experimental asthma? J Biol Chem. 2010 Nov 26;285(48):le19: author reply le20. doi: 10.1074/jbc.L110.145698.
Lu TX, Munitz A, Rothenberg ME MicroRNA-21 is up-regulated in allergic airway inflammation and regulates IL-12p35 expression. J Immunol. 2009 Apr 15;182(8):4994-5002. doi: 10.4049/jimmunol.0803560.
Mattes J, Collison A, Plank M, Phipps S, Foster PS Antagonism of microRNA-126 suppresses the effector function of TH2 cells and the development of allergic airways disease. Proc Natl Acad Sci U S A. 2009 Nov 3;106(44):18704-9. doi: 10.1073/pnas.0905063106. Epub 2009 Oct 20.
Omran A, Elimam D, Yin F MicroRNAs: new insights into chronic childhood diseases. Biomed Res Int. 2013;2013:291826. doi: 10.1155/2013/291826. Epub 2013 Jun 27. Review.
Schulze J, Rosewich M, Riemer C, Dressler M, Rose MA, Zielen S Methacholine challenge--comparison of an ATS protocol to a new rapid single concentration technique. Respir Med. 2009 Dec;103(12):1898-903. doi: 10.1016/j.rmed.2009.06.007. Epub 2009 Jul 10.
Zhang YY, Zhong M, Zhang MY, Lv K [Expression and clinical significance of miR-155 in peripheral blood CD4(+);T cells of patients with allergic asthma]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2012 May;28(5):540-3. Chinese.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.