Barnettdrew5607
Radiation-induced fibrosis (RIF) is a serious complication that occurs after irradiation and which is caused by the deposition of extracellular matrix (ECM) proteins such as collagen. However, the underlying mechanisms, including the expression of the cytokines, that promote the RIF process, are not yet fully understood. MicroRNAs (miRNAs) have recently been suggested to act as post-transcriptional repressors for many genes; however, their role in the process of RIF remains to be elucidated. Our previous study showed that ionizing radiation increased the type I collagen expression through the activation of transforming growth factor (TGF)-β, while miR-29 repressed this increase. This study aimed to investigate the mechanisms by which the expression of connective tissue growth factor (CTGF), a downstream mediator of TGF-β, is controlled by miRNAs post-transcriptionally after exposure to ionizing radiation. The expression of CTGF in NIH-3T3 cells and mouse embryonic fibroblasts was increased by ionizing radiation. However, this increase was suppressed with a specific inhibitor of TGF-β receptor. Among the predictable miRNAs that target the CTGF gene, the expression of miR-26a was downregulated after exposure to ionizing radiation and this regulation was negatively mediated by TGF-β signaling. miR-26a negatively regulated the CTGF expression at the post-transcriptional level; however, ionizing radiation suppressed this negative regulation. In addition, the overexpression of miR-26a inhibited the expression of CTGF and type I collagen after irradiation. In conclusion, miR-26a modulates the expression of CTGF via TGF-β signaling in irradiated fibroblasts. The results suggest the potential application of miR-26a in the treatment of RIF.Hip fractures are common in the elderly, and many patients with hip fractures have low vitamin D levels. This study found that severe vitamin D deficiency is linked to poorer recovery of function and quality of life after hip fracture surgery.
Vitamin D deficiency is prevalent in hip fracture patients and associated with increased mortality and complications. However, there is limited long-term data on how vitamin D levels affect functional outcomes after hip fracture surgery. The aim of this study is to ascertain the association between vitamin D levels and recovery from hip surgery.
Patients who underwent hip fracture surgery from January 2012 to December 2016 and had vitamin D levels assessed during admission were included. selleck products Retrospective analysis was performed on patients' demographic data such as age, gender and clinical parameters such as preoperative vitamin D, haemoglobin levels, Charlson Comorbidity Index (CCI), and type and site of surgery. Patients were divided according to four different vitaminity of life after hip fracture surgery.
The central sulcus is an important landmark in the brain. This study aimed to investigate the distinctive signal of the paracentral lobule (PL) on T1-weighted images (T1WIs; the white PL sign) and evaluate its usefulness as a new method of identifying the central sulcus.
T1WIs of the brain of 96 participants (age, 58.9 ± 17.9years; range, 8-87years) scanned at 3-T MR system were retrospectively reviewed. First, we qualitatively analyzed the signal of the cortex of the PL by comparing it with that of the ipsilateral superior frontal gyrus on a 4-point grading score. Second, we compared the cortical signal intensity and gray/white-matter contrast between the PL and superior frontal gyrus. Third, we evaluated the usefulness of the PL signal for identifying the central sulcus.
The PL cortex was either mildly hyperintense (grade 2) or definitely hyperintense (grade 3) in comparison with that of superior frontal cortex in all participants. The signal intensity of the PL cortex was significantly higher than that of the superior frontal cortex (p < 0.001), whereas the gray/white-matter contrast of the PL was weaker than that of the superior frontal gyrus (p < 0.001). The central sulci were identified with 94.3% accuracy (181/192) using the new method.
The white PL sign may be helpful in identifying the central sulcus, and this approach can be recognized as a new method for identification of the central sulcus.
The white PL sign may be helpful in identifying the central sulcus, and this approach can be recognized as a new method for identification of the central sulcus.Calcium pyrophosphate dihydrate crystal deposition (CPPD), also known as pseudogout, can have spinal manifestations in roughly one quarter of patients. We present a rare, intradural manifestation of CPPD requiring surgical intervention, with a review of pertinent differential diagnoses on imaging. A 48-year-old male presented with urinary retention, and was found to have an intradural lesion with peripheral enhancement on gadolinium T1-weighted magnetic resonance imaging. Due to the patient's progressive neurological deterioration, he was taken for a minimally invasive approach for resection of the lesion. Histopathological analysis revealed crystal deposits with rhomboidal birefringence consistent with CPPD. The imaging features of this lesion were atypical for any of the traditional intradural extramedullary lesions. Typically seen extradurally, recognizing CPPD as a potential culprit for intradural compression is helpful to recognize for providers.Quorum sensing (QS) is a sophisticated bacterial communication system which plays a key role in the virulence and biofilm formation of many pathogens. The Pseudomonas aeruginosa QS network consists of four sets of connected systems (las, rlh, pqs and iqs) hierarchically organized. The pqs system involves characteristic autoinducers (AI), most of them sharing an alkylquinolone (AQ) structure, and is able to carry out several relevant biological functions besides its main signalling activity. Their role in bacterial physiology and pathogenicity has been widely studied. Indeed, the presence of these metabolites in several body fluids and infected tissues has pointed to their potential value as biomarkers of infection. In this review, we summarize the most recent findings about the biological implications and the clinical significance of the main P. aeruginosa AQs. These findings have encouraged the development of analytical and bioanalytical techniques addressed to assess the role of these metabolites in bacterial growth and survival, during pathogenesis or as biomarkers of infections.
