Detection of Sentinel Node Micrometastasis by Step Section and Immunohistochemistry in Patients with Prostate Cancer

取得学位 : 博士（医学）, 学位授与番号 : 医博甲第1844号, 学位授与年月日 : 平成19年3月22日, 学位授与大学 : 金沢大学, 主査教授 : 太田 哲生, 副査教授 : 井上 正樹, 大井 章

Effects of Assisted Reproduction Technology on Placental Imprinted Gene Expression

We used placental tissue to compare the imprinted gene expression of IGF2, H19, KCNQ1OT1, and CDKN1C of singletons conceived via assisted reproduction technology (ART) with that of spontaneously conceived (SC) singletons. Of 989 singletons examined (ART n = 65; SC n = 924), neonatal weight was significantly lower (P < .001) in the ART group than in the SC group, but placental weight showed no significant difference. Gene expression analyzed by real-time PCR was similar for both groups with appropriate-for-date (AFD) birth weight. H19 expression was suppressed in fetal growth retardation (FGR) cases in the ART and SC groups compared with AFD cases (P < .02 and P < .05, resp.). In contrast, CDKN1C expression was suppressed in FGR cases in the ART group (P < .01), while KCNQ1OT1 expression was hyperexpressed in FGR cases in the SC group (P < .05). As imprinted gene expression patterns differed between the ART and SC groups, we speculate that ART modifies epigenetic status even though the possibilities always exist

Postharvest Properties of Ultra-Late Maturing Peach Cultivars and Their Attributions to Melting Flesh (M) Locus: Re-evaluation of M Locus in Association With Flesh Texture

The postharvest properties of two ultra-late maturing peach cultivars, "Tobihaku" (TH) and "Daijumitsuto" (DJ), were investigated. Fruit were harvested at commercial maturity and held at 25 degrees C. TH exhibited the characteristics of normal melting flesh (MF) peach, including rapid fruit softening associated with appropriate level of endogenous ethylene production In contrast, DJ did not soften at all during 3 weeks experimental period even though considerable ethylene production was observed. Fruit of TH and DJ were treated with 5,000 ppm of propylene, an ethylene analog, continuously for 7 days. TH softened rapidly whereas DJ maintained high flesh firmness in spite of an increase in endogenous ethylene production, suggesting that DJ but not TH lacked the ability to be softened in response to endogenous and exogenous ethylene/propylene. DNA-seq analysis showed that tandem endo-polygalacturonase (endoPG) genes located at melting flesh (M) locus, Pp-endoPGM (PGM), and Pp-endoPGF (PGF), were deleted in DJ. The endoPG genes at M locus are known to control flesh texture of peach fruit, and it was suggested that the non-softening property of DJ is due to the lack of endoPG genes. On the other hand, TH possessed an unidentified M haplotype that is involved in determination of MF phenotype. Structural identification of the unknown M haplotype, designated as M-0, through comparison with previously reported M haplotypes revealed distinct differences between PGM on M-0 haplotype (PGM-M-0) and PGM on other haplotypes (PGM-M-1). Peach M haplotypes were classified into four main haplotypes: M-0 with PGM-M-0; M-1 with both PGM-M-1 and PGF; M-2 with PGM-M-1; and M-3 lacking both PGM and PGF. Re-evaluation of M locus in association with MF/non-melting flesh (NMF) phenotypes in more than 400 accessions by using whole genome shotgun sequencing data on database and/or by PCR genotyping demonstrated that M-0 haplotype was the common haplotype in MF accessions, and M-0 and M-1 haplotypes were dominant over M-2 and M-3 haplotypes and co-dominantly determined the MF trait. It was also assumed on the basis of structural comparison of M haplotypes among Prunus species that the ancestral haplotype of M-0 diverged from those of the other haplotypes before the speciation of Prunus persica

Timing jitter removers of photon detectors

Among various performances of photon detectors, the timing jitter is difficult to improve because of its trade-offs with other important performances such as detection efficiency. Such trade-offs have been an issue in applications, especially for high-purity non-Gaussian-state generation necessary in optical quantum computation. Here, we introduce a method using an external fast optical switch -- Timing Jitter Remover (TJR) -- whose time window limits the photon-detectable time of photon detectors and improve the timing jitter without sacrificing other performances. By using a TJR, we experimentally improve the timing jitter of a photon-number-resolving detector based on a transition edge sensor, from 50 ns to 10 ns. Using this improved detector, we generate one of important non-Gaussian states, a Schr\"{o}dinger cat state with Wigner negativity of -0.01, which cannot be observed without TJRs. TJRs would be the key technology for the realization of ultra-fast, fault-tolerant, universal optical quantum computer.Comment: 26 pages, 6 figure

Fusion of SPECT and multidetector CT images for accurate localization of pelvic sentinel lymph nodes in prostate cancer patients

金沢大学大学院医学系研究科OBJECTIVE: The present study was performed to investigate the feasibility of fusion of images obtained by SPECT and multidetector CT (MDCT) for the accurate localization of sentinel lymph nodes in prostate cancer patients. METHODS: To facilitate the fusion of both SPECT and CT images, a pelvic MDCT scan was performed with 3 markers of small plastic bullets attached to the skin over the bilateral iliac crests and the ventral midline at the same height. SPECT was performed after the same locations were marked with needle caps containing (99m)Tc-pertechnetate. The images were superimposed by use of free software (MRIcro). The results of hot lymph node detection with fusion images were compared with those of surgery. RESULTS: The images could be successfully superimposed for all 11 patients examined. Surgeons accurately confirmed 27 (87.1%) of 31 regional lymph nodes on fusion images. CONCLUSION: Fusion of SPECT and MDCT images is useful for the precise localization of sentinel lymph nodes in prostate cancer patients

Transabdominal Approach for Spontaneous Oesophageal Perforation: A Review of Four Cases

Spontaneous oesophageal perforation is an uncommon and life-threatening disease. Although several methods of treatment have been proposed, surgical treatment is considered the standard procedure. Primary repair using the transthoracic approach is the most common. However, few studies have evaluated the characteristics of the transabdominal approach. This study aimed to investigate the clinical outcomes of spontaneous oesophageal perforation that was surgically treated using the transabdominal approach. We retrospectively reviewed all patients with spontaneous oesophageal perforation who were admitted to the surgical department of our institution between November 2010 and April 2017, and identified a total of four patients. Data including demographic factors (age and sex), location of perforation, time to operation, operative method, complications, length of hospital stay, and postoperative recovery were reviewed. In all four cases, we treated the defect using the transabdominal approach, which provides a good surgical field of view. The aims of operative intervention, namely primary repair and access for enteral feeding, can be achieved using this approach. The most commonly observed complication was pyothorax, and we suggest the addition of intrapleural drainage for its prevention. Dysgraphia was observed in two patients, which improved with conservative treatment. The overall mortality rate was 0%. Our results demonstrate that primary repair using the transabdominal approach is safe and effective for the management of spontaneous oesophageal perforation. Addition of intrapleural drainage can improve the outcome associated with this approach

A Rare Case Oesophageal Perforation by a Fish Bone, Leading to Pericardial Penetration and Cardiac Tamponade

An 82-year-old woman swallowed a fish bone and presented to our hospital 3 days later when she had breathing difficulty and became hypotensive. Chest computed tomography (CT) showed a linear structure with high bone density extending from the oesophagus into the pericardium, along with pericardial effusion, air, and a left pleural effusion. We diagnosed the patient with oesophageal perforation by a foreign body (a fish bone) leading to pericardial penetration, cardiac tamponade, and left empyema. The patient underwent emergency surgery. Pericardial fenestration and drainage of the pericardial and thoracic cavities were performed. Chest CT showed a recurrent abscess cavity in the pericardium on day 6. A pigtail catheter was placed in the recurrent abscess cavity under CT guidance for drainage. The patient gradually improved and was discharged after 5 months

Effective Appendix Stump Closure Using the Doubleshanked Titanium Ligation Clip (DS Clip): A Case Report

Background: During laparoscopic appendectomy, several methods and devices can be used to close the appendicular stump, such as endoloops, linear staplers, clips, and open purse-string sutures. The Double-shanked Titanium Ligation Clip® (DS clip; B. Braun Aesculap, Tuttlinger, Germany), a new device that can be used to close the appendicular stump, was approved for use in Japan in March 2015. We report a case of effective appendix stump closure using DS clips. Case presentation: An 81-year-old man was admitted to our hospital with complaints of severe pain in the right lower quadrant of the abdomen. Abdominal contrast-enhanced computed tomography showed a thickened appendix (1.7 cm in diameter) with fecal stones, while acute inflammatory signs were visible around the appendix. He was diagnosed with acute appendicitis for which laparoscopic appendectomy was performed with a curative intent. It was difficult to mobilize the cecum because of inflammation, so we attempted to use DS clips instead of linear staplers. A histological examination revealed gangrenous appendicitis. The patient’s postoperative course was uneventful and he was discharged 10 days postoperatively. We also used DS clips to close the appendicular stump in 12 other cases. We observed no intra- or postoperative complications and no cases of mortality. Conclusion: The management of an appendicular stump using DS clips during laparoscopic appendectomy was simple, safe, and cost-effective. DS clips may be an alternative method to linear staplers