Tsuyoshi Nemoto

Overexpression of Fatty Acid Synthase in Oesophageal Squamous Cell Dysplasia and Carcinoma

Objective: The expression of fatty acid synthase (FAS), an enzyme necessary for de novo fatty acid synthesis, has been examined in several types of tumours so far, but not in oesophageal cancer and dysplasia. Methods: We examined the immunohistochemical reactivity of FAS in 4 normal adult oesophagi, 14 dysplastic oesophageal lesions, and 80 squamous cell carcinomas and 6 cases with 4 special types of malignancies of the oesophagus. We also analysed the correlation between FAS expression and various clinicopathological features and long-term survival in patients with oesophageal cancer. Results: In the normal oesophagus, only faint cytoplasmic FAS expression was observed in cells of the basal layer. In contrast, FAS-positive cells were found in 92.9% of cases of dysplasia and 96.5% of cases of carcinoma including 6 cases with a specific histological subtype. However, high expression of FAS did not correlate with either clinicopathological features or prognosis of patients with oesophageal cancer. Conclusion: Our results demonstrate that FAS is expressed in almost all oesophageal carcinomas of both usual and special types and dysplastic lesions, suggesting that FAS may be upregulated continuously from the early stage of oesophageal squamous cell carcinogenesis to established carcinoma.

Prediction of sensitivity to fluoropyrimidines by metabolic and target enzyme activities in gastric cancer

BackgroundThis study was designed to investigate the role of thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD), and thymidine phosphorylase (TP) in tumor progression and sensitivity to 5-fluorouracil (5-FU).MethodsA total of 275 tumor samples from 275 patients with gastric cancer were utilized in this study. TS activity was determined in 130 samples by 5-fluorodeoxyuridine monophosphate binding assay. DPD activity was measured in 140 samples by radioenzymatic assay, and TP protein level was determined in 157 samples by an enzyme-linked immunosorbent assay (ELISA) system. These parameters were compared with several clinicopathologic factors and sensitivity to 5-FU determined by in-vitro ATP assay. The antitumor activities of 5-FU, uracil plus tegafur (UFT), and 1 M tegafur — 0.4 M 5-chloro-2,4-dihydroxypyridine — 1 M potassium oxonate (S-1 [TS-1®]) were also compared, using three human gastric cancer xenografts in nude mice.ResultsThere was no correlation between either TS or TP and sensitivity to 5-FU. However, a weak inverse correlation was found between DPD activity and sensitivity to 5-FU. High DPD activity in tumor resulted in poor prognosis, especially in patients who received 5-FU-based adjuvant chemotherapy. Although TP was significantly correlated with depth of tumor invasion and with lymphatic and venous invasions, TP alone had no impact on survival. On the other hand, TS, as well as peritoneal, hepatic, and lymph node metastases, was selected as an independent prognostic factor in gastric cancer. In the animal model, there was no significant difference in antitumor activities among the drugs in a tumor with low DPD activity. However, S-1 showed superior antitumor activity to 5-FU or UFT in tumors with high DPD activity.ConclusionDPD is considered to be a most important predictive factor of 5-FU sensitivity. The use of DPD inhibitory fluoropyrimidines is strongly recommended for tumors with high DPD activity.

A need for tetanus vaccination before restoration activities in Fukushima, Japan.

Tetanus is an infectious disease caused by exposure of wounds to spores of Clostridium tetani. The disease is fatal but preventable through vaccination. In Japan, tetanus vaccinations have been included in the routine national immunization program for children only since 1968. Thus, many of those who were born before 1968 are unimmunized against tetanus. Indeed, of 666 tetanus patients reported from 2006 to 2011 in Japan, 89% (596/666) were over 50 years of age according to the National Institute of Infectious Diseases.

The importance of family caregiving to achieving palliative care at home: a case report of end-of-life breast cancer in an area struck by the 2011 Fukushima nuclear crisis

Rationale: The primary setting of palliative care has shifted from inpatient care to patients’ residences. Family caregiving is essential for patients with life-limiting illnesses to receive palliative care at home, however little information is available regarding potential interventions to achieve palliative homecare for those without sufficient support from family members in various settings, including disasters. Patient concerns: In March 2011, Fukushima, Japan experienced an earthquake, tsunami and nuclear disaster. In August 2015, a 59-year-old Japanese female presented to our hospital, located 23 km north of Fukushima Daiichi Nuclear Power Plant, with a right breast ulcer. Diagnoses: The patient was diagnosed with stage IV breast cancer. Interventions: The patients general condition gradually worsened despite a one-year course of chemotherapy, and she became bedridden after a fall in October 2016. Although the patient wished to receive palliative homecare, this appeared challenging to achieve because she resided alone in a temporary housing shelter. Although she originally lived with her family in Odaka District, Fukushima, she relocated outside of the city following evacuation orders after the disaster. The evacuation orders for Odaka District were still in effect when she returned to the city alone in 2014. We contacted her sister who moved apart from her during the evacuation, and explained the necessity of family caregiving to enable her palliative homecare. Outcomes: The sister decided to move back to their original residence in Odaka District and live with the patient again. The patient successfully spent her end-of-life period and died at home. Lessons: Health care providers and community health workers may need to take a pro-active approach to communicating with family members to draw informal support to enable patients’ end-of-life management according to their values and preferences. This is a lesson which may be applicable to broader healthcare settings beyond cancer, or disaster contexts, considering that population ageing and social isolation may continue to advance worldwide.

Asymptomatic hepatic portal venous gas with gastric emphysema as a chronic complication of gastrostomy tube placement: a case report

BackgroundPercutaneous endoscopic gastrostomy feeding is widely used as a route for enteral feeding for patients with impaired swallowing ability, particularly in older patients. Hepatic portal venous gas is a condition that may arise from several causes. Hepatic portal venous gas that develops after an endoscopic procedure is generally reported to be nonfatal, yet there is little information available concerning the characteristics of hepatic portal venous gas as a chronic complication of percutaneous endoscopic gastrostomy feeding.Case presentationWe experienced a case of hepatic portal venous gas that happened to be detected in an 81-year-old Japanese man with long-term percutaneous endoscopic gastrostomy use who was admitted to our hospital with aspiration pneumonia. While aspiration pneumonia was treated with antibiotics and suspension of tube feedings, he recovered from hepatic portal venous gas without any treatment.ConclusionsThe presence of a percutaneous endoscopic gastrostomy tube may have induced hepatic portal venous gas through a mechanism in which vomiting led to increased abdominal pressure and eventually gastric emphysema. This case suggests that hepatic portal venous gas without any signs of bowel ischemia or emphysematous gastritis can resolve without treatment, which is a finding that could be helpful for clinicians who deal with those supported by percutaneous endoscopic gastrostomy feeding.

Voluntary Medical Support Is Key After Nuclear Disasters

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