Prediction of Gastric Gastrointestinal Stromal Tumors before Operation: A Retrospective Analysis of Gastric Subepithelial Tumors.

Gastrointestinal stromal tumors (GISTs), leiomyomas, and schwannomas are the most common gastric subepithelial tumors (GSETs) with similar endoscopic findings. Preoperative prediction of GSETs is difficult. This study analyzed and predicted GSET diagnosis through a retrospective review of 395 patients who underwent surgical resection of GISTs, leiomyomas, and schwannomas measuring 2-10 cm. GSETs were divided by size (group 2-5, >2 and ≤5 cm; group 5-10, >5 and ≤10 cm) for analysis. Demographics, clinical symptoms, and images were analyzed. A recursive partitioning analysis (RPA) was used to identify optimal classifications for specific GSET diagnoses. GIST patients were relatively older than other patients. Both groups had higher proportions of UGI bleeding, lower hemoglobin (Hb) levels, and a higher ratio of necrosis on their computed tomography (CT) scans. The RPA tree showed that (a) age ≤ 55, Hb ≥ 10.7, and CT necrosis; (b) age ≤ 55 and Hb < 10.7; (c) age >55 and Hb < 12.9; and (d) age >55 and CT hetero-/homogeneity can predict high GIST risk in group 2-5. Positive or negative CT necrosis, with age >55, can predict high GIST risk in group 5-10. GIST patients were older and presented with low Hb levels and tumor necrosis. In RPA, the accuracy reached 85% and 89% in groups 2-5 and 5-10, respectively.

Identification of an MiRNA-mRNA Regulatory Network in Colorectal Cancer.

BACKGROUND: Colorectal cancer (CRC) is the fourth most prevalent cancer in the world. However, the molecular mechanism underlying CRC is largely unknown. OBJECTIVE: To explore the pathogenic mechanism of CRC and to facilitate better diagnosis and treatment of this disease. METHODS: Differentially expressed miRNAs (DEMs) and genes (DEGs) in CRC vs. Control samples from the miRNA expression data in GSE115513 and the miRNA and mRNA expression data in the TCGA-COAD dataset were screened, followed by the construction of the miRNAmRNA regulatory network. Functional and pathway enrichment analysis, protein-protein interaction (PPI) analysis, and survival analysis were then performed for these DEGs and DEMs. RESULTS: We identified 64 DEMs from the GSE115513 dataset and 265 DEMs and 2218 DEGs from the TCGA-COAD dataset. miR-27a-3p was a hub DEM with the highest degree in the miRNA-mRNA network, while GRIN2B and PCDH10 were hub DEGs targeted by multiple miRNAs, including miR-27a-3p. SNAP25 and GRIN2B were also hub DEGs with the highest degree of interactions in the PPI network. These DEMs and DEGs were significantly enriched in multiple KEGG pathways, including proteoglycans expression and cAMP signaling pathway in cancer. Finally, seven DEGs, including FJX1 Dsc2, and hsa-miR-375, were revealed to be correlated with CRC prognosis. CONCLUSION: Aberrant expressions of genes and miRNAs were involved in the pathogenesis of CRC, probably by regulating proteoglycans expression and cAMP signaling. miR-27a-3p, PCDH10, GRIN2B, FJX1, Dsc2, and hsa-miR-375 were identified as potential targets for understanding the pathogenic mechanism of CRC. In addition, FJX1, Dsc2 and hsa-miR-375 were identified as potential predictive markers for CRC prognosis.

Majocchi's granuloma on the forearm caused by Trichophyton tonsurans in an immunocompetent patient.

Majocchi's granuloma is an uncommon fungal infection of the dermis and subcutaneous tissue. The most frequently identified cause of Majocchi's granuloma is anthropophilic Trichophyton rubrum, and it is most commonly located on the anterior aspect of the lower limbs in women. Here, we report a case of Majocchi's granuloma on the forearm, a site that is rarely involved, in a 62-year-old woman who had been bitten by a dog. Histological examination revealed a dense dermal infiltrate composed of lymphoplasmacytic cells and neutrophils, with hyphae in the dermis. The presence of the fungus, Trichophyton tonsurans, was confirmed by mycological examination and molecular methods. Therefore, histological and mycological examination confirmed the diagnosis of Majocchi's granuloma. The patient was treated with local moxibustion and itraconazole, 200 mg/day, for 60 days, which facilitated a complete resolution of the lesions.

Endothelial differentiation of Wharton's jelly-derived mesenchymal stem cells in comparison with bone marrow-derived mesenchymal stem cells.

OBJECTIVE: Mesenchymal stem cells (MSCs) can be isolated from umbilical cord Wharton's jelly (UC-MSC) and UC can be easily obtained, representing a noncontroversial source of MSCs. UC-MSCs are more primitive than other tissue sources. Previous studies showed that UC-MSCs were still viable and were not rejected 4 months after transplantation as xenografts without the need for immune suppression, indicating that they are favorable cell source for transplantation. In this study, UC-MSCs were induced to differentiate into endothelial-like cells and compared with bone marrow (BM)-MSCs for their endothelial differentiation potential. MATERIALS AND METHODS: UC-MSCs and BM-MSCs were characterized for expression of MSC-specific markers and osteogenic, adipogenic, and chondrogenic differentiation. They were induced to differentiate into endothelial-like cells and analyzed for expression of the endothelial-specific markers and functions. RESULTS: UC-MSCs and BM-MSCs showed similarities in expression of the MSC-specific markers and osteogenic, adipogenic, and chondrogenic differentiation. They showed similar low-density lipoprotein-uptaking capacity following endothelial differentiation. However, UC-MSCs had higher proliferative potential than BM-MSCs. Both real-time reverse transcription polymerase chain reaction and immunocytochemical analyses demonstrated that UC-MSCs had higher expression of the endothelial-specific markers than BM-MSCs following endothelial differentiation. Both Matrigel and coculture angiogenesis assays showed that UC-MSCs and BM-MSCs after endothelial differentiation were able to form the capillary network and differentiated UC-MSCs had significantly higher total tubule length, diameter, and area than differentiated BM-MSCs. CONCLUSION: These results showed that UC-MSCs had higher endothelial differentiation potential than BM-MSCs. Therefore, UC-MSCs are more favorable choice than BM-MSCs for neovascularization of engineered tissues.