OBJECTIVESInflammatory mediators play important roles in the pain associated with rotator cuff tears (RCTs), but their underlying mechanisms are unclear. Apelin, a neuropeptide, is upregulated under ...inflammatory conditions and possibly contributes to pain induced by rotator cuff tears. This translational study aimed to examine apelin expression and regulation by tumor necrosis factor alpha (TNF-α) in patients with RCT and in rat RCT models. METHODSSynovial tissues were harvested from the glenohumeral joints of the shoulders in 46 patients who underwent arthroscopic Bankart repair for recurrent shoulder dislocations (RSDs) or arthroscopic rotator cuff repair for RCTs. The harvested tissues were extracted and processed by reverse transcriptase-polymerase chain reaction (RT-PCR). Rats underwent sham or RCT surgery; the rotator cuff tissues were extracted 1, 7, 14, 28, and 56 days after surgery and analyzed for mRNA expression levels of the TNF-α and apelin using RT-PCR. The cultured rotator cuff cells (RCCs) were stimulated with TNF-α to examine their role in the regulation of apelin expression. RESULTSApelin expression was higher in the RCT group than in the RSD group and significantly correlated with pain intensity. In rats, the expression was also higher in RCT. Apelin expression significantly increased during the acute and chronic phases in rats. CONCLUSIONSIn cultured RCCs, apelin mRNA levels significantly increased after TNF-α stimulation. Apelin levels were regulated by TNF-α and were highly expressed in patients with RCT and rats in RCT models. Thus, apelin may be a new pain management target for RCTs.
Necrosis avascular, manifestación en el COVID-Largo ortopédico Serna Trejos, Juan Santiago; Bermudez Moyano, Stefanya Geraldine; Cardona-Bejarano, Luis Fernando
Revista cubana de ortopedia y traumatología,
06/2023, Letnik:
37, Številka:
2
Journal Article
Abstract Lumbar intervertebral disc herniations are the most common causes for working-age individuals to undergo lumbar spine surgery. Patients with a family history of disc disease or are in ...physically demanding jobs, or who have certain medical comorbidities such as obesity, are at an increased risk of developing a lumbar disc herniation. Symptomatic herniations present as lumbar radiculopathy from both a mechanical compression and chemical irritation of the nerve root.
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