A Special Tear Pattern of Anterior Horn of the Lateral Meniscus: Macerated Tear

Background We describe a special, interesting phenomenon found in the anterior horn of the lateral meniscus (AHLM): most tear patterns in the AHLM are distinctive, with loose fibers in injured region and circumferential fiber bundles were separated. We name it as macerated tear. The goal of this study was to bring forward a new type of meniscal tear in the AHLM and investigate its clinical value. Materials and Methods AHLM tears underwent arthroscopic surgery from January 2012 to December 2014 were included. Data regarding the integrity of AHLM were prospectively recorded in a data registry. Tear morphology and treatment received were subsequently extracted by 2 independent reviewers from operative notes and arthroscopic surgical photos. Results A total of 60 AHLM tears in 60 patients (mean age 27.1 years) were grouped into horizontal tears (n = 15, 25%), vertical tears (n = 14, 23%), complex tears (n = 6, 10%), and macerated tears (n = 25, 42%). There were 6 patients with AHLM cysts in macerated tear group and one patient in vertical tear group. 60 patients were performed arthroscopic meniscus repairs and were followed-up with averaged 18.7 months. Each group had significant postoperative improvement in Lysholm and IKDC scores (p 0.05). Conclusions This study demonstrated that the macerated tear is common in the tear pattern of AHLM. However, feasibility of the treatment of this type of meniscal tear, especially the meniscus repairs still requires further study

Short Hairpin RNA (shRNA) Ether à go-go 1 (Eag1) Inhibition of Human Osteosarcoma Angiogenesis via VEGF/PI3K/AKT Signaling

Ether à go-go 1 (Eag1) channel is overexpressed in a variety of cancers but the therapeutic potential of Eag1 in osteosarcoma remains elusive. In this study, we constructed an Ad5-Eag1-shRNA vector and evaluated its efficiency for Eag1 knockdown and its effects on osteosarcoma. Our results showed that Ad5-Eag1-shRNA had high interference efficiency of Eag1 expression and suppressed osteosarcoma growth both in vitro and in vivo. To explore the molecular mechanism underlying tumor growth inhibition induced by Eag1 silencing, the intratumoral microvessel density (MVD) was assessed by CD31 staining and the expression of vascular endothelial growth factor (VEGF) was detected by Western blot analysis. We found that Eag1 silencing led to decreased angiogenesis and VEGF expression in the xenograft model of osteosarcoma. Finally, we detected a time-dependent decrease in VEGF expression and considerably reduced phosphoinositide 3-kinase (PI3K) and protein kinase B (AKT) activation in osteosarcoma cells treated by Eag1 shRNA. Taken together, our results suggest that Eag1 silencing inhibits tumor growth and angiogenesis in osteosarcoma via the down regulation of VEGF/PI3K/AKT signaling

Platelet-rich Plasma Reverses the Inhibition of Tenocytes and Osteoblasts in Tendon-Bone Healing

The purpose of this study was to investigate the effect of platelet-rich plasma on the proliferation of osteoblasts and tenocytes in tendon-bone healing. We cultured osteoblasts and tenocytes in an indirect coculture system with Transwell filters (Merck Millipore, Billerica, Massachusetts). The proliferation was examined using Cell Counting Kit-8 (Dojindo Chemistry Research Institute, Kumamoto, Japan). Four groups were studied: group 1, one cell type cultured without platelet-rich plasma; group 2, two cell types cultured together in an indirect coculture system without platelet-rich plasma; group 3, cells in the outer chamber and platelet-rich plasma in the inner chamber; and group 4, two different cell types in each of the 2 chambers with platelet-rich plasma in the inner chamber. The proliferation rates of groups 3 and 4 were the highest, followed by group 1 and then group 2, which was the lowest. Platelet-rich plasma abolishes the inhibition of osteoblasts or tenocytes in an indirect coculture system and improves the cell proliferation rate

TEMPORAL ASSOCIATION RULE MINING BASED ON T-APRIORI ALGORITHM AND ITS TYPICAL APPLICATION

A new algorithm “T-Apriori ” based on time constraint is designed and implemented on the basis of analyzing the related definitions and general steps of temporal association rule mining. The concepts of ecological event and sequence of ecological events are proposed and the problems of temporal association rule mining based on a sequence of ecological events are discussed in details. A sequence of ecological events is an ordered ecological events set. Red tide phenomena of noctiluca scintillans during 1991 and 1992 in Dapeng bay, South China Sea was taken as an example to validate T-Apriori algorithm and K-means clustering analysis is used to map the quantitative association rule problem into the Boolean association rule problem. Our example experiment shows that T-Apriori algorithm can successfully extract temporal association rules which described the close relationship between environmental factors and noctiluca scintillans events. 1

Ether a go-go 1 Silencing in Combination with TRAIL Overexpression Has Synergistic Antitumor Effects on Osteosarcoma

Fujian Natural Science Foundation, China [C0710048]Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has been utilized for cancer therapy, but the resistance of cancer cells to TRAIL remains an obstacle. Ether a go-go 1 (Eag1) channel is overexpressed in a variety of cancers and implicated in tumor progression. However, the therapeutic potential of Eag1 in osteosarcoma remains elusive. In this study, we generated CRAd5.TRAIL/siEag1 adenoviral vector that permitted simultaneous knockdown of Eag1 and overexpression of TRAIL and investigated its antitumor effects on human osteosarcoma MG-63 cells. Our results showed that CRAd5.TRAIL/siEag1 induced growth arrest and apoptosis of MG-63 cells in a more efficient manner than CRAd5.TRAIL or CRAd5.siEag1, and had no effect on human osteoblastic hFOB1.19 cells. Furthermore, treatment of an osteosarcoma xenograft model with CRAd5.TRAIL/siEag1 resulted in significant tumor regression and cancer cell apoptosis, compared with treatment with CRAd5. TRAIL or CRAd5.siEag1. Taken together, our results demonstrate that CRAd5.TRAIL/siEag1 may represent an effective strategy for osteosarcoma gene therapy due to the synergistic antitumor effects of Eag1 knockdown and TRAIL overexpression

Sagittal proton density-weighted MRI of the knee of a 21-year-old male show that the disorder and irregular strip-like signal was observed in the AHLM and articular capsule.

<p>Sagittal proton density-weighted MRI of the knee of a 21-year-old male show that the disorder and irregular strip-like signal was observed in the AHLM and articular capsule.</p

A 18-year-old male with macerated tear of the AHLM (A), and the suture repairs, inside-out horizontal mattress meniscal repairs, were performed treatment (B).

<p>A 18-year-old male with macerated tear of the AHLM (A), and the suture repairs, inside-out horizontal mattress meniscal repairs, were performed treatment (B).</p