Spatiotemporal Changes in the Gene Expression Spectrum of the ß2 Adrenergic Receptor Signaling Pathway in the Lungs of Rhesus Monkeys.

OBJECTIVE: ß2 adrenergic receptor (ADRB2) agonists mainly participate in regulation of airway function through the ADRB2-G protein-adenylyl cyclase (AC) signaling pathway; however, the key genes associated with this pathway and the spatiotemporal changes in the expression spectrum of some of their subtypes remain unclear, resulting in an insufficient theoretical basis for formulating the dose and method of drug administration for neonates. METHODS: We performed sampling at different developmental time points in rhesus monkeys, including the embryo stage, neonatal stage, and adolescence. The MiSeq platform was used for sequencing of key genes and some of their subtypes in the ADRB2 signaling pathway in lung tissues, and target gene expression was normalized and calculated according to reads per kilobase million. RESULTS: At different lung-developmental stages, we observed expression of phenylethanolamine N-methyltransferase (PNMT), ADRB2, AC, AKAP and EPAC subtypes (except AC8, AKAP4/5), and various phosphodiesterase (PDE) subtypes (PDE3, PDE4, PDE7, and PDE8), with persistently high expression of AC6, PDE4B, and AKAP(1/2/8/9/12/13, and EZR) maintained throughout the lung-developmental process, PNMT, ADRB2, AC(4/6), PDE4B, and AKAP(1/2/8/9/12/13, EZR, and MAP2)were highly expressed at the neonatal stage. CONCLUSION: During normal lung development in rhesus monkeys, key genes associated with ADRB2-G protein-AC signaling and some of their subtypes are almost all expressed at the neonatal stage, suggesting that this signaling pathway plays a role in this developmental stage. Additionally, AC6, PDE4B, and AKAP(1/2/8/9/12/13, and EZR) showed persistently high expression during the entire lung-developmental process, which provides a reference for the development and utilization of key gene subtypes in this pathway.

[Effect of LncRNA GATA3-AS1 Targeting MiR-515-5p on Cell Proliferation and Apoptosis in Childhood Acute Lymphoblastic Leukemia Cells].

OBJECTIVE: To investigate the effects of long non-coding RNA (lncRNA) GATA3 antisense RNA 1 (GATA3-AS1) targeting miR-515-5p on the proliferation and apoptosis of childhood acute lymphoblastic leukemia (ALL) cells. METHODS: RT-qPCR was used to determine the expression of GATA3-AS1 and miR-515-5p in the plasma of controls and ALL children. Human ALL cells Jurkat were divided into si-GATA3-AS1, si-NC, miR-NC, miR-515-5p, si-GATA3-AS1+anti-miR-NC and si-GATA3-AS1+anti-miR-515-5p groups. CCK-8 assay was used to detect the cell proliferation, and flow cytometry was used to detect the cell apoptosis. The targeting relationship between GATA3-AS1 and miR-515-5p was determined by dual-luciferase reporter assay. RESULTS: The expression level of GATA3-AS1 in the plasma of ALL children was significantly higher than that of controls (P <0.001), while the expression level of miR-515-5p was significantly lower than that of controls (P <0.001). Compared with the si-NC group, the cell inhibition rate, apoptosis rate, and miR-515-5p expression level in si-GATA3-AS1 group were significantly increased (P <0.001). Compared with the miR-NC group, the cell inhibition rate and apoptosis rate in miR-515-5p group were significantly increased (P <0.001). GATA3-AS1 could directly and specifically bind to miR-515-5p. Compared with the si-GATA3-AS1+anti-miR-NC group, the cell inhibition rate and apoptosis rate in si-GATA3-AS1+anti-miR-515-5p group were significantly decreased (P <0.001). CONCLUSION: Down-regulation of GATA3-AS1 can inhibit proliferation and induce apoptosis of childhood ALL cells by targeting up-regulation of miR-515-5p expression.

Intraoral one-stage curved osteotomy for the prominent mandibular angle: a clinical study of 407 cases.

BACKGROUND: Many Oriental people have a square face with a prominent mandibular angle. This article presents a good osteotomy method for the prominent mandibular angle (PMA). METHODS: Two modifications of the conventional procedures have been made. The first is a one-stage curved osteotomy for the mandibular angle. The second is nonresection of the masseter muscle. The surgical procedure has been performed using an intraoral approach with a direct field of vision. RESULTS: From October 1996 to December 2002, a total of 407 patients with PMA underwent surgery using this method with satisfactory results. The PMA osteotomy procedure was performed for only 248 patients. In addition, 29 patients received concurrent zygomatic reduction osteotomy, 38 patients underwent concurrent genioplasty, 41 patients had concurrent chin augmentation with excised PMA bone fragment, 2 patients received concurrent submental liposuction, and 39 patients underwent concurrent buccal fat pad resection. CONCLUSION: The described method is a very simple procedure with fewer complications for the surgical treatment of PMA.