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Biomedical subjects

G Hori

Publications and source records attributed to G Hori.

At least 19 recordsLinked to original sources
PubMed2005

Isolation of gene sets affected specifically by polyglutamine expression: implication of the TOR signaling pathway in neurodegeneration.

Transcriptional dysregulation as a result of sequestration of essential transcription factors into protein aggregates formed by polyglutamine (polyQ) expansions can lead to late-onset progressive neurodegeneration. DNA microarray analysis of Drosophila expressing polyQ in the compound eye over time revealed large numbers of transcriptional changes at the earliest stages of the disease including repression of the transient receptor potential calcium channels in a polyQ-induced cell death specific manner. While significant differences in expression profiles were found between the Drosophila compound eye and polyQ-sensitive neural cells, a number of possible key overlapping regulators were extracted. Among these, PDK1 was shown to act as a mediator for polyQ-toxicity, suggesting the involvement of the TOR pathway in polyQ-induced neurodegeneration.

3-Phosphoinositide-Dependent Protein Kinases↗
PubMed2001

Successfully treated composite graft infection after Bentall's procedure.

A 47-year-old male patient underwent Bentall's modification with total arch replacement owing to type A acute dissection. Mediastinitis and composite graft infection occurred 3 weeks after the operation. Extensive debridement and irrigation followed by omental wrapping without graft removal were performed and the patient was successfully cured.

Aneurysm, Infected↗
PubMed2001

Soy protein hydrolyzate with bound phospholipids reduces serum cholesterol levels in hypercholesterolemic adult male volunteers.

This study was done to evaluate the effects of soy protein hydrolyzate with bound phospholipids (c-SPHP), on the serum cholesterol levels in hypercholesterolemic subjects over a three-month period. Subjects were Taiwanese adult male volunteers whose serum total cholesterol levels were above 220 mg/dl. Twenty-one subjects were divided into three groups randomly, and each group was given c-SPHP zero, 3, or 6 g per day. Test diets were orally administered in a powdered drink form that contained c-SPHP or casein hydrolyzate (placebo). The subjects were given the test diet four times daily. The study consisted of a two-week pre-feeding period, a three-month feeding period, followed by a two-week post-feeding period. After 3 months of c-SPHP administration, 3 g per day, serum total cholesterol decreased significantly from the initial level (15.0%, p<0.01) and compared with the placebo group (p<0.05). Furthermore, LDL-cholesterol decreased significantly (27.7%, p<0.01) and the LDL/HDL ratio also decreased significantly (47.4%, p<0.01) from the initial levels. These effects of c-SPHP were dose-dependent. This study suggests that c-SPHP has remarkable improving effects on the serum cholesterol levels in hypercholesterolemic subjects.

Adult↗
PubMed2000

Tiny thymic carcinoma completely surrounded by thymic tissue. The possibility of de novo carcinoma.

We report a case of a 61-year-old man with a tiny thymic carcinoma completely surrounded by thymic tissue. First, a thoracoscopic resection of about two-thirds of the right inferior part of the thymus containing the tumor was performed to obtain the histological diagnosis. Frozen-section diagnosis at operation revealed a thymic carcinoma. Therefore we performed a median sternotomy and resected the remnant of the thymus. A tiny thymic carcinoma completely surrounded by thymic tissue is extremely rare. In this case, as the tumor was tiny and there was a homogeneous mass without a thymoma-like component, we concluded that this tumor was de novo.

Carcinoma↗
PubMed2000

Sleeve lobectomy of the middle lobe for hilar lung cancer with accompanying cardiomyopathy and actinomycosis.

The indication for sleeve lobectomy of the middle lobe is limited, because the frequency of cancer occupying both the middle lobe and its bifurcation is low and the more commonly used middle and lower lobectomy is an alternate procedure. However, if a patient has accompanying cardiopulmonary restriction, lung preservation is paramount. We present a patient with hilar lung cancer (TisN0M0) associated with progressive cardiomyopathy, who underwent sleeve lobectomy of the middle lobe; the cancer took a favorable course.

Actinomycosis↗
PubMed2000

[Thymic carcinoma successfully treated by a combination of intra-arterial infusion chemotherapy and surgery].

A 47-year-old man with thymic carcinoma that had invaded the inner pericardium and adhered to the superior vena cava and right atrium at first operation was treated with intra-arterial infusion chemotherapy (nedaplatin and adriamycin) through the internal thoracic artery. After 2 courses of modified ADOC therapy (nedaplatin, adriamycin, vincristine, and cyclophosphamide), chest computed tomographic (CT) scans revealed a 47% reduction in tumor size. No adverse effects due to the anticancer drugs were observed. Resection of the tumor included part of the upper lobe of the right lung and pericardium. Examination of resected tumor tissue specimens revealed viable cancer cells and extensive fibrosis. The diagnosis was thymic anaplastic carcinoma. We concluded that intra-arterial selective infusion chemotherapy utilizing an ADOC regimen can be of value as a treatment for thymic carcinoma.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1999

Soy protein peptic hydrolysate with bound phospholipids decreases micellar solubility and cholesterol absorption in rats and caco-2 cells.

This experiment was designed to evaluate the effects of casein, soy protein, soy protein with bound phospholipids (SP), soy protein peptic hydrolysate (SPH) or soy protein peptic hydrolysate with bound phospholipids (SPHP) on the micellar solubility of cholesterol and the taurocholate binding capacity in vitro. We also evaluated the effects of various proteins on cholesterol metabolism in rats and Caco-2 cells. SPHP had a significantly greater bile acid-binding capacity than that of SPH in vitro. Micellar cholesterol solubility in vitro was significantly lower in the presence of SPHP compared to casein tryptic hydrolysate (CTH). The cholesterol micelles containing SPHP and SPH significantly suppressed cholesterol uptake by Caco-2 cells compared to the cholesterol micelles containing CTH. Consistent with these findings in the in vivo cholesterol absorption study using radioisotopes, fecal excretion of total steroids was significantly greater in rats fed the SPHP diet compared with those fed the casein, soy protein, SP and SPH diets. Serum total cholesterol was significantly lower in rats fed SPHP than in those fed casein. The concentrations of total lipids and cholesterol in liver were significantly lower in the SPHP-fed group compared with all other groups. These results suggest that the suppression of cholesterol absorption by direct interaction between cholesterol-mixed micelles and SPHP in the jejunal epithelia is part of the mechanism underlying the hypocholesterolemic action of SPHP. SPHP may also inhibit the reabsorption of bile acids in the ileum, thus lowering the serum cholesterol level.

Amino Acids↗
PubMed1999

[A case of typical carcinoid accompanied with left atrium myxoma].

A 78-year-old female was admitted to Shizuoka red cross hospital because of an abnormal shadow at the right upper lung field on chest X-ray film. A left atrium myxoma was detected at chest CT scan after admission. Though the lung tumor was well defined and hilar and mediastinal lymph nodes were not swollen at CT scan, the tumor was suspected a small cell carcinoma at the result of trans-bronchoscopic biopsy. Firstly we performed removal of the left atrium myxoma, and two months later, we performed thoracotomy and partial resection of the right upper lobe. The lung tumor was finally diagnosed as a typical carcinoid. We have followed the patient for about 32 months after the operation and there is no evidence of tumor recurrence.

Aged↗
PubMed1999

[Emergency coronary artery bypass grafting in dialysis patients].

Emergency coronary artery bypass surgery was performed in nineteen patients including five chronic hemodialysis patients. In fourteen patients (non-dialysis patients), ten patients required preoperative IABP and four required PCPS for cardiogenic shock. Four patients died (29%); three from LOS and one from sudden death. Most of them (3/4) were preoperative cardiogenic shock. In other five patients (dialysis patients), four patients had conventional CABG, while one received off-pump bypass surgery for calcified aorta and brain complication. All five patients received arterial in situ conduit and continuous hemofiltration in the early postoperative period for controlling water and electrolyte. Two patients died (40%); one from arrhythmia and one from deterioration of original disease (SLE encephalopathy) but no one died from LOS. These methods of surgical modification and perioperative management for chronic hemodialysis patients are considered very useful.

Aged↗
PubMed1998

Endoscopic transthoracic sympathectomy with a fine (2-mm) thoracoscope in palmar hyperhidrosis: a case report.

Endoscopic transthoracic sympathectomy (ETS) is a minimally invasive method, causing only small injuries and few complications, and requires only a short period of hospitalization. Therefore, this method has been applied to patients with palmar hyperhidrosis to whom the conventional transthoracic sympathectomy, which is much more invasive, or thoracic sympathetic blockade, which often causes complications, cannot be applied. Conventional thoracoscopes, such as a resectoscope 8 mm in diameter for urological operations, or a thoracoscope 5 mm in diameter, were usually used for this purpose, but they cause operative injuries. We performed ETS using a thoracoscope 2 mm in diameter (MiniSite 2 mm 0 degrees, USSC171303). Its visual field and handling were not inferior to those of conventional thoracoscopes, and the operative injuries were only 2 mm in size. For the patient, a small scar of this size means virtually no scar.

Adolescent↗
PubMed1998

Primary seminoma in the middle mediastinum: case report in a 69-year-old male.

Primary mediastinal seminoma is an uncommon tumor usually located in the anterior mediastinum. The majority of cases occur in young males. We report here an extremely rare case of a 69-year-old male with primary seminoma in the middle mediastinum. The patient had no complaints, but an abnormal shadow was seen in a routine chest X-ray. We performed a tumorectomy in the middle mediastinum, a thymectomy and an orchidectomy and added postoperative chemotherapy. It seems that the tumor was not associated with the thymus, so we believe the tumor did not stem from the embryonic thymus. Our case demonstrated that mediastinal seminoma does not always occur in the anterior mediastinum of young males. Although this case is rare, seminoma should be included among the possible diagnoses of a middle mediastinal mass.

Aged↗
PubMed1998

Effective treatment of thymic carcinoma with operation and combination chemotherapy against acute monocyte leukemia: case report and review of the literature.

Thymic carcinoma associated with acute monocyte leukemia (AMoL) and a history of choriocarcinoma was diagnosed in a 58-year-old female. We found no other such case in a literature search. She was first treated with DCMP therapy: daunorubicin, cytosine arabinoside, 6MP-riboside, and prednisolone against AMoL. After induction chemotherapy, complete AMoL remission was attained. Chest CT scan after chemotherapy revealed regression of the mediastinal tumor. Resection of the tumor included the left upper lobe of the lung, phrenic nerve and pericardium. Pathological diagnosis showed poorly or moderately differentiated squamous cell carcinoma. Although the patient died of pneumonia during chemotherapy for relapsed AMoL, chest X-ray and CT revealed no recurrence of the mediastinal tumor after the original operation. Judging from this case and other successful cases of chemotherapy, we feel that intensive chemotherapy may be a beneficial strategy against thymic carcinoma.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1998

[Therapeutic thoracoscopy for empyema thoracis].

In empyema thoracis, it is important to reduce the duration of treatment and to expand the collapsed lung as fully as possible while managing intrathoracic infection. We used thoracoscopy to treat 10 cases of empyema that were not completely cured by antibiotics or thoracic drainage. The 8 men and 2 women were 43-73 years of age. Thoracoscopy was done under general anesthesia except for 2 pneumonia patients. After inserting two trocars into the thoracic cavity, we removed pus, the purulent coat, and fibrinous membrane. Into one unilocular cavity, two intrathoracic tubes were inserted via trocarholes. Postoperative irrigation of the thoracic cavity was conducted daily through the two tubes. We subclassified the fibropurulent stage into three phases, namely, the purulent, fibrous, and purulent-capsular. One case required redrainage, but no cases were accompanied by severe complications or postoperative death. Patients were discharged on post-operative day 33, on average. We found no recurrence or cases of recollapsed lung during the study, from 8 months to 4 years and 11 months postoperatively.

Acute Disease↗
PubMed1997

Mediastinal tuberculous lymphadenitis diagnosed and treated by thoracoscopy.

Mediastinal tuberculous lymphadenitis is a relatively rare disorder and it is sometimes hard to identify the acid-fast bacilli involved or its specific pathological findings. We employed thoracoscopy to obtain diagnostic material from a 25-year-old woman with a newly-appearing mediastinal mass despite antituberculous therapy for cervical tuberculous lymphadenitis. Thoracoscopy also proved effective in the curative surgical procedure, i.e. resection of the abscess wall as far as possible, debridement of the remaining wall, irrigation, and instillation of streptomycin into the abscess and thoracic cavity. Postoperatively the patient has followed a favorable course for one year.

Abscess↗
PubMed1997

A thymoma associated with hyperparathyroidism.

A 50-year-old woman sustaining a noninvasive thymoma accompanied by hyperparathyroidism is presented. Although this is the third case report to date in the literature of the combination of these two diseases, the patient did not evidence the myasthenia gravis cited in the two previous reports. In the two years following concomitant extended thymectomy and resection of the right superior parathyroid gland, including the adenoma, the patient has been following a favorable course without recurrence.

Adenoma↗
PubMed1997

Serum cholesterol reduction and cholesterol absorption inhibition in CaCo-2 cells by a soyprotein peptic hydrolyzate.

The serum cholesterol level in rats was significantly decreased in a group fed on a soyprotein peptic hydrolyzate (SPH) when compared with a group fed on a casein tryptic hydrolyzate (CTH). The fecal excretion of total steroids was significantly greater with rats fed on the SPH diet when compared with the CTH diet. The results of CaCo-2 studies clearly suggest that the suppression of cholesterol absorption in the intestinal epithelia is part of the mechanism for the hypocholesterolemic action induced by SPH.

Animals↗