Prognosis of Elderly Patients with Advanced Gastric Cancer without Serosal Invasion

Introduction: The impact of age on the prognosis of patients with gastric cancer is controversial. This study aimed to investigate the clinicopathologic features and prognosis of elderly, advanced gastric cancer patients without serosal invasion compared to their younger counterparts. Materials and Methods: We retrospectively evaluated 43 elderly patients with advanced gastric cancer without serosal invasion. The clinicopathologic findings were compared between the elderly (age >70 years) and young (age <36 years) patients. Results: Significantly higher numbers of elderly patients had tumors with differentiated histology, whereas more young patients had tumors with undifferentiated histology (P < 0.01). Curability (risk ratio, 3.122; confidence interval, 1.242-4.779; P < 0.001) was an independent prognostic factor of survival. The 5-year survival rates were not significantly different between the elderly and the young patients according to the absence of serosal invasion (80.0% vs 77.9%; P = 0.654) and undergoing curative resection (82.0% vs 78.9%; P = 0.312). Meanwhile, among the elderly patients, those who underwent curative resection had a better survival rate than those with non-curative resection (82.0% vs 67.8%; P < 0.001). Conclusion: Elderly patients with advanced gastric cancer without serosal invasion do not have a worse prognosis than their younger counterparts, indicating that age does not impact the prognosis of advanced gastric cancer. The important prognostic factor was whether the patients underwent curative resection

Design and Experimental Validation of a Control System for Dynamic Positioning of a Shuttle Tanker

In this paper, a dynamic positioning performance evaluation procedure for a shuttle tanker is discussed through experimental and numerical analyses. A dynamically positioned shuttle tanker with six thrusters (three tunnel thrusters, two azimuth thrusters, and one main propeller with a rudder), operated in deep water condition was considered. A conventional proportional-derivative control algorithm was adopted for the main feedback control algorithm to reduce the position error, and an anti-windup integral control algorithm was introduced to suppress the steady-state error in the dynamic positioning operation. A minimum power consumption algorithm, based on the Lagrange multiplier method, was utilised in the thrust allocation for the thruster systems. An extended Kalman filter was used in the experiment to separate the low-frequency motion from the measured vessel motion. A set of experiments and numerical analyses were conducted in this study under the same environmental conditions and with the same control methodology. The dynamic positioning operation results obtained by the experiments and numerical simulations were compared to evaluate the station-keeping performance of the dynamically positioned shuttle tanker

Investigation of the SH3BP2 Gene Mutation in Cherubism

Cherubism is a rare developmental lesion of the jaw that is generally inherited as an autosomal dominant trait. Recent studies have revealed point mutations in the SH3BP2 gene in cherubism patients. In this study, we examined a 6-year-old Korean boy and his family. We found a Pro418Arg mutation in the SH3BP2 gene of the patient and his mother. A father and his 30-month-old younger brother had no mutations. Immunohistochemically, the multinucleated giant cells proved positive for CD68 and tartrate-resistant acid phosphatase (TRAP). Numerous spindle-shaped stromal cells expressed a ligand for receptor activator of nuclear factor kB (RANKL), but not in multinucleated giant cells. These results provide evidence that RANKL plays a critical role in the differentiation of osteoclast precursor cells to multinucleated giant cells in cherubism. Additionally, genetic analysis may be a useful method for differentiation of cherubism.</p

Folding machineries displayed on a cation-exchanger for the concerted refolding of cysteine- or proline-rich proteins

<p>Abstract</p> <p>Background</p> <p><it>Escherichia coli </it>has been most widely used for the production of valuable recombinant proteins. However, over-production of heterologous proteins in <it>E. coli </it>frequently leads to their misfolding and aggregation yielding inclusion bodies. Previous attempts to refold the inclusion bodies into bioactive forms usually result in poor recovery and account for the major cost in industrial production of desired proteins from recombinant <it>E. coli</it>. Here, we describe the successful use of the immobilized folding machineries for <it>in vitro </it>refolding with the examples of high yield refolding of a ribonuclease A (RNase A) and cyclohexanone monooxygenase (CHMO).</p> <p>Results</p> <p>We have generated refolding-facilitating media immobilized with three folding machineries, mini-chaperone (a monomeric apical domain consisting of residues 191–345 of GroEL) and two foldases (DsbA and human peptidyl-prolyl <it>cis-trans </it>isomerase) by mimicking oxidative refolding chromatography. For efficient and simple purification and immobilization simultaneously, folding machineries were fused with the positively-charged consecutive 10-arginine tag at their C-terminal. The immobilized folding machineries were fully functional when assayed in a batch mode. When the refolding-facilitating matrices were applied to the refolding of denatured and reduced RNase A and CHMO, both of which contain many cysteine and proline residues, RNase A and CHMO were recovered in 73% and 53% yield of soluble protein with full enzyme activity, respectively.</p> <p>Conclusion</p> <p>The refolding-facilitating media presented here could be a cost-efficient platform and should be applicable to refold a wide range of <it>E. coli </it>inclusion bodies in high yield with biological function.</p

Thermoelectric and bulk mobility measurements in pentacene thin films

Low-noise thermoelectric and electrical measurements were used to derive the dependences of Seebeck coefficient and hole mobility on carrier concentration and grain size in the &quot;bulk&quot; regions of thermally evaporated pentacene thin films (in contrast to the channel field-effect mobility typically measured using thin-film transistor geometries). Distinct charge transport regimes were observed for larger (0.5 and 0.8 ??m) and smaller (0.2 ??m) grain sizes, attributed to carrier-dopant scattering and percolation, respectively.clos

Simultaneous fabrication of line defects-embedded periodic lattice by topographically assisted holographic lithography

We have demonstrated simultaneous fabrication of designed defects within a periodic structure. For rapid fabrication of periodic structures incorporating nanoscale line-defects at large area, topographically assisted holographic lithography (TAHL) technique, combining the strength of hologram lithography and phase-shift interference, was proposed. Hot-embossing method generated the photoresist patterns with vertical side walls which enabled phase-shift mask effect at the edge of patterns. Embossing temperature and relief height were crucial parameters for the successful TAHL process. Periodic holes with a diameter of 600 nm at a 1 μm-pitch incorporating 250 nm wide line-defects were obtained simultaneously

Prognosis of gastric cancer patients with paraaortic lymph node metastasis versus those with distant metastases

Background. It has long been thought that cases of advanced gastric cancer with paraaortic lymph node (PALN) metastasis are impossible to cure. However, several recent reports on the long-term survival of patients with PALN metastasis have reported an increase in the use of gastrectomy with extended lymphadenectomy, involving the dissection of more nodes than those invaded by the tumor, as the standard surgery for advanced gastric cancer. Material and methods. We reviewed the records of 1,015 patients with a confirmed histologic diagnosis of gastric cancer. Among patients with stage IV gastric cancer, 38 had PALN metastasis compared with 233 with peritoneal dissemination and 77 with hepatic metastasis. Results. Based on tumor location, metastasis to the PALNs was more common in upper-third cancer (p &lt; 0.01); hepatic metastasis was more common in well-differentiated adenocarcinoma; and peritoneal dissemination was more common in poorly differentiated cancer (p &lt; 0.001). The 5-year survival in patients with metastasis to the PALNs was significantly higher (28.2%) than in patients with peritoneal dissemination (5.2%) or hepatic metastasis (12.0%) (p &lt; 0.01). Conclusions. The results reveal a better 5-year survival associated with gastric cancer patients with PALN metastasis as compared with those with other distant metastases. Therefore, we recommend performing a more extended lymphadenectomy in patients with gastric cancer, especially those with suspected metastasis to the PALNs.Introduction. It has long been thought that cases of advanced gastric cancer with paraaortic lymph node (PALN) metastasis are impossible to cure. However, several recent reports on the long-term survival of patients with PALN metastasis have reported an increase in the use of gastrectomy with extended lymphadenectomy, involving the dissection of more nodes than those invaded by the tumour, as the standard surgery for advanced gastric cancer. Material and methods. The records of 1,015 patients with a confirmed histologic diagnosis of gastric cancer had been reviewed. Among patients with stage IV gastric cancer, 38 had PALN metastasis compared with 233 with peritoneal dissemination and 77 with hepatic metastasis. Results. Based on tumour location, metastasis to the PALNs was more common in upper-third cancer (p &lt; 0.01); hepatic metastasis was more common in well-differentiated adenocarcinoma, and peritoneal dissemination was more common in poorly differentiated cancer (p &lt; 0.001). The 5-year survival in patients with metastasis to the PALNs was significantly higher (28.2%) than in patients with peritoneal dissemination (5.2%) or hepatic metastasis (12.0%) (p &lt; 0.01). Conclusions. The results reveal a better 5-year survival associated with gastric cancer patients with PALN metastasis as compared with those with other distant metastases. Therefore, performing a more extended lymphadenectomy in patients with gastric cancer is recommended, especially those with suspected metastasis to the PALNs