Publications by authors named "Orita H"

Article Synopsis
  • The study examines how bariatric/metabolic surgery affects the incidence and severity of COVID-19 among patients in Japan, amidst ongoing debates about its protective benefits.
  • Data were collected from 83 institutions, revealing that while there were no severe cases or deaths among 119 patients studied, moderate COVID-19 cases were notably more prevalent in these bariatric patients than in the general population.
  • The findings suggest that bariatric/metabolic surgery does not reduce the risk of COVID-19 complications, as moderate cases were linked to specific risk factors such as dyslipidemia and prior infection.
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Objectives: The number of elderly people with stomach cancer is increasing; therefore, minimally invasive surgical treatments are required. Elderly patients have multiple comorbidities and are prone to postoperative weight loss, nutritional disorders, Postgastrectomy syndrome (PGS), and decreased quality of life (QOL). Total gastrectomy is particularly associated with these complications, although aboral-pouch creation reportedly improves the condition by compensating for lost reservoir capacity.

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Article Synopsis
  • Seven low molecular weight peptides were identified as potential biomarkers for diagnosing hypertensive disorders of pregnancy (HDP) and their relationship with leg ischemia and atherosclerosis in patients with lower extremity arterial disease (LEAD) was explored.
  • * A study involving 165 outpatients (mainly men) assessed symptoms of leg ischemia and blood flow using the Rutherford classification, ankle-brachial index (ABI), and carotid artery intima-media thickness (IMT).
  • * Results indicated that certain peptides (m/z 2091 and 2378) were positively correlated with leg ischemia severity, while peptide m/z 2081 showed an inverse relationship; however, these peptides did not correlate with carotid atherosclerosis.
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Objectives: Cardio-ankle vascular index (CAVI) is a blood pressure-independent measure of heart-ankle pulse wave velocity and is used as an indicator of arterial stiffness. However, there is a paradox that CAVI is inversely associated with leg ischemia in patients with lower extremity arterial disease (LEAD). The aim of this study was to clarify the significance of the absolute value of left and right difference in CAVI (diff-CAVI).

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Objective: Tragal pumping (TP) is a practice of pushing on the tragus to raise pressure within the external auditory canal and is a commonly recommended adjunctive maneuver believed to facilitate the introduction of ototopical medications into the middle ear cavity via a tympanostomy tube. To investigate the efficacy of TP in the penetration of eardrops into the middle ear cavity via tympanostomy tube, we established the novel tympanostomy tube-rat model. We investigated the histology of the middle ear to determine the efficacy in moving fluid into the middle ear.

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Background: Compared to distal gastrectomy (DG), pylorus-preserving gastrectomy (PPG), a peristaltic function-preserving surgery for early gastric cancer (EGC), is advantageous as it leads to a more improved nutritional status and quality of life (QOL) of patients. In recent years, total laparoscopic PPG (TLPPG), an anastomosis which is performed intracorporeally, has increasingly replaced laparoscopic-assisted PPG (LAPPG) due to its minimal invasiveness.

Aim: To evaluate the safety and feasibility of TLPPG in terms of perioperative efficacy.

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Measurements of ankle-brachial index (ABI) and toe-brachial index (TBI) are standard examinations for evaluating arterial blood flow in lower extremities and diagnosing lower extremity artery disease (LEAD). It remains to be clarified whether cardio-ankle vascular index (CAVI), a blood pressure-independent parameter of arterial stiffness, is associated with ABI and TBI in patients with LEAD. The subjects were 165 outpatients with LEAD.

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Background And Aims: Eosinophils are present in several solid tumors and have context-dependent function. Our aim is to define the contribution of eosinophils in esophageal squamous cell carcinoma (ESCC), as their role in ESCC is unknown.

Methods: Eosinophils were enumerated in tissues from 2 ESCC cohorts.

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Article Synopsis
  • Dysgeusia, a taste disorder caused by cancer chemotherapy, negatively affects patients' quality of life, and this study aimed to evaluate its prevalence and causes among patients with gastrointestinal cancer.
  • The research involved 21 patients undergoing chemotherapy and utilized both subjective and objective assessment tools to measure taste alterations, finding that dysgeusia occurred in 38% of patients treated with certain regimens, particularly those containing platinum-based drugs.
  • The study concluded that a combined assessment approach was effective in diagnosing dysgeusia and suggested that factors other than zinc deficiency might contribute to this condition.
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  • Gastrectomy with D2 dissection and adjuvant chemotherapy is the usual treatment for locally advanced gastric cancer (LAGC) in Asia, but administering post-surgery chemotherapy can be challenging, especially in older patients.
  • This phase II study (KSCC1801) investigated the safety and efficacy of neoadjuvant chemotherapy (NAC-SOX) in patients aged 70 and above, finding that it resulted in a high resection rate (92.3%) and a significant pathological response (62.5%).
  • Though NAC-SOX showed promise, there were notable adverse events like neutropenia and a treatment-related death due to severe diarrhea, indicating the need for careful management.
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Background/aims: Eosinophils are present in several solid tumors and have context-dependent function. Our aim is to define the contribution of eosinophils in esophageal squamous cell carcinoma (ESCC), since their role in ESCC is unknown.

Methods: Eosinophils were enumerated in tissues from two ESCC cohorts.

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Background And Aims: Seven circulating peptides, consisting of 18-28 amino acids, were identified as possible biomarkers of hypertensive disorders of pregnancy (HDP) in our previous study. However, it is unknown whether these peptides are relevant to cardiovascular disease. The purpose of this study was to clarify the relationships between serum levels of these peptides and leg arterial blood flow in patients with lower extremity arterial disease (LEAD).

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Background: The risk of cardiovascular disease is lower in light-to-moderate alcohol drinkers than in nondrinkers in the general population. However, it remains to be clarified whether these beneficial effects of alcohol are shown in patients with peripheral arterial disease (PAD).

Methods: The subjects were 153 male outpatients with PAD and they were divided by frequency of drinking into nondrinkers, occasional drinkers (1-4 days/wk) and regular drinkers (5-7 days/wk).

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Background: Local resection is the standard treatment for gastrointestinal stromal tumors (GISTs). Laparoscopic and endoscopic cooperative surgery (LECS) is a minimally invasive surgery used to resect GISTs. Herein, we report an extremely rare case of a gastric GIST that grossly vanished during LECS.

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Background: Advanced gastric cancer has an unfavorable prognosis and poor curability. Immune checkpoint inhibitors, such as nivolumab, have recently emerged as a potential solution for this aggressive disease. However, there is a lack of established evidence on the clinical efficacy of these agents, particularly in the perioperative period for advanced gastric cancer patients who are unresectable, recurrent, or preoperative.

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Background: The transorally inserted anvil (OrVil™) is frequently selected for esophagojejunostomy after laparoscopic total gastrectomy (LTG) because of its versatility. During anastomosis with OrVil™, the double stapling technique (DST) or hemi-double stapling technique (HDST) can be selected by overlapping the linear stapler and the circular stapler. However, no studies have reported the differences between the methods and their clinical significance.

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Article Synopsis
  • Chronic inflammation is linked to cancer, but how this happens isn't well understood.
  • A protein called Gasdermin D (GSDMD) helps remove damaged cells in the intestines, and scientists studied its role in colorectal cancer (CRC).
  • They found that when GSDMD is missing, CRC develops faster, suggesting this protein helps protect against the disease in humans.
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Small non-coding RNAs (sncRNAs) are defined by being less than 200 nucleotides (nt) in length, and consequently, have been divided into many different subclasses including mature microRNA (miRNA), small interfering RNA (siRNA), piwi-interacting RNA (piRNA), protein functional effector sncRNA (pfeRNA), precursor miRNA (pre-miRNA), small nucleolar RNA (snoRNA), 5S ribosome RNA (5SrRNA), 5.8SrRNA, and small nuclear RNA (snRNA). Except for the class of pfeRNAs, the discovery, identification, biogenesis, characterization, and function of other sncRNAs have been well documented.

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Background: Regarding the need for mesh fixation in total extraperitoneal inguinal hernia repair (TEP), several studies have found no significant differences in the recurrence rate between patients with and without fixation. Furthermore, there is no report on the outcome of this treatment from Japan. We aimed to analyze the outcomes of nonfixation TEP with those of fixation at our institute.

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Background: Postoperative pyoderma gangrenosum (PPG) is a rare inflammatory skin disease of unknown etiology characterized by blistering and ulcerative lesions in postoperative wounds. Untreated pyoderma gangrenosum (PG) is potentially life-threatening; therefore, immediate and appropriate treatment is essential. Although PPG and surgical site infection (SSI) present similar clinical findings, they should be differentiated because of their conflicting treatment modalities.

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Esophageal basaloid squamous cell carcinoma (EBSCC) is a poorly differentiated variant of esophageal squamous cell carcinoma (ESCC). We aimed to investigate the clinicopathological and molecular biological characteristics of EBSCC and enrolled 58 patients with EBSCCs. Clinicopathological factors including age, sex, tumor size and location, gross tumor type (superficial, protrusive, ulcerative, and unclassifiable), lymphovascular invasion, infiltrative growth, intramural invasion, TNM stage, and dominant histological type were examined.

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Agenesis of the left hepatic lobe is an exceedingly rare morphological anomaly. Moreover, agenesis of the left hepatic lobe accompanied by esophagogastric cancer is even rarer, with no reports to date. Agenesis of the hepatic lobe is commonly related to some anatomical variations of the gastrohepatic system.

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Children born to women who experience stress during pregnancy have an increased risk of atherosclerosis in later life, but few animal models have explored mechanisms. To study this phenomenon, timed-bred ApoE knockout mice were determined pregnant with ultrasound and randomly assigned on to either a control (no stress) or prenatal stress (PS) group using 2 h of restraint for five consecutive days. PS significantly increased plasma corticosterone levels in pregnant mice.

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Background: The mainstream first-line chemotherapy for advanced/recurrent gastric cancer (ARGC) is combination therapy including platinum-based agents. With the progressive aging of the society, the incidence of gastric cancer in elderly patients is increasing. However, elderly patients cannot tolerate these agents because of renal dysfunction or low quality of life.

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