Journal: Journal of Neuroinflammation
Article Title: Superior control of inflammatory pain by corticotropin-releasing factor receptor 1 via opioid peptides in distinct pain-relevant brain areas
doi: 10.1186/s12974-022-02498-8
Figure Lengend Snippet: CRF-R1 and CRF-R2 mRNA expression in the hypothalamus region of the rat with 4 day FCA-induced hind paw inflammation. A RNA extraction from the rat hypothalamus, implementation of conventional PCR using specific primer pairs for CRF-R1 and CRF-R2, and subsequent visualization on a 2% agarose gel provided specific PCR products for the expression of CRF-R1 (280 bp) and CRF-R2 (230 bp) mRNA. B Shows the DNA melting profiles of the CRF-R1 (right) and CRF-R2 (left) specific primer pairs. C , D Quantification of CRF-R1 and CRF-R2 mRNA using Taqman® Real-Time PCR in the hypothalamus region of the rat brain. C The amplification profiles of the 18S- and CRF-R1- and CRF-R2-specific cDNA of rat hypothalamus. D The column graph representing % CRF-R1 mRNA expression relative to the expression of CRF-R2 mRNA. Note that CRF-R1 expression is more than threefold higher than that of CRF-R2 (experiments were done in duplicate from n = 5 rats, * P < 0.05, two-tailed independent Student t-test)
Article Snippet: The following drugs were used: rat/human CRF (Sigma-Aldrich, St. Louis, MO); CRF-R1 agonist stressin I and CRF-R1 antagonist NBI 27914 (Bio-Techne GmbH, Wiesbaden-Nordenstadt, Germany); CRF-R2 agonist urocortin-2 (Ucn-2), CRF-R2 antagonist K41498 (Bio-Techne GmbH, Wiesbaden-Nordenstadt, Germany); naloxone hydrochloride (Sigma-Aldrich, St. Louis, MO).
Techniques: Expressing, RNA Extraction, Agarose Gel Electrophoresis, Real-time Polymerase Chain Reaction, Amplification, Two Tailed Test