Biomedical subjects

K Hashino

Publications and source records attributed to K Hashino.

At least 37 records · Page 2Linked to original sources

PubMed1999

A resected case of pancreatic metastasis from primary renal cell carcinoma.

A 71-year-old man, who had received a right nephrectomy for a primary renal cell carcinoma 8 years earlier, and had two years later received a distal gastrectomy for duodenal ulcer, was admitted. In the subsequent clinical course, a solitary low echographical tumor was found in the pancreas. Abdominal computed tomography revealed a tumor of low density area, and celiac angiography revealed a hypervascular tumor stain of the pancreas. From the above findings, a diagnosis of pancreatic tumor was made, and a distal pancreatectomy was performed. Examination of the resected tissues confirmed the presence of a solitary tumor in the pancreatic tail. Histologically, the tumor corresponded to the initial renal cell carcinoma and pancreatic metastasis of renal cell carcinoma was diagnosed. We report a resected case of such a metastasis and review the literature.

Aged↗

PubMed1999

Angiomyolipoma of the liver--a case report and review of 48 cases reported in Japan.

Hepatic angiomyolipoma was considered to be a rare benign tumor, but the number of cases has been increasing recently as imaging techniques improve. We describe a case of hepatic angiomyolipoma for which a definitive diagnosis could not be made on imagings and in which resection was performed. The patient had anti-HCV antibody and slight dysfunction of the liver. The tumor showed a heterogeneous high echo on ultrasonography and a low attenuation value of +32.6 Housfield Units, which was much higher than fat density, on plain computed tomography. Discrimination from hepatocellular carcinoma with fatty change was difficult preoperatively. Microscopically, the tumor consisted of spindle-shaped and epithelioid smooth muscles, adipose tissues and proliferating blood vessels and these histological findings confirmed the diagnosis of hepatic angiomyolipoma. The appearance of hepatic angiomyolipoma on imaging diagnosis varies widely due to the fact that the relative proportion of vessels, muscles and fats varies widely from tumor to tumor. The tumor in our case had relatively few fat components. We review 48 cases reported in Japan and discuss imaging diagnosis and surgical indications for tumors.

Angiomyolipoma↗

PubMed1999

A so-called carcinosarcoma of the gallbladder in a patient with multiple anomalies--a case report.

The patient was a 65-year-old woman with a chief complaint of right upper quadrant pain. Under the diagnosis of gallbladder tumor, preduodenal portal vein and absence of the pancreatic tail, cholecystectomy was performed. Intraoperative findings resulted in a diagnosis of gallbladder tumor, absence of the pancreatic tail, presence of preduodenal portal vein, and malrotation of the intestine. Histological examination of the resected specimens showed a so-called carcinosarcoma. Carcinosarcoma of the gallbladder is a rare tumor of the hepatobiliary region. The present case differs from previously reported cases in its presentation with multiple anomalies including the presence of preduodenal portal vein. Many cases of preduodenal portal vein in an association with duodenal stenosis in children have been reported, but reports of cases of preduodenal portal vein in adult patients are rarely seen in the literature.

Adult↗

PubMed1999

A case of intraabdominal bleeding following pancreatoduodenectomy successfully treated by transcatheter arterial embolization.

A 58-year-old male underwent pancreatoduodenectomy based on a diagnosis of middle bile duct cancer. Because abdominal drainage revealed bile leakage 5 days postoperatively, leakage at the site of cholangiojejunostomy was diagnosed, and continuous aspiration was performed. Seventeen days postoperatively, pus was discharged through the abdominal drain. Because bleeding was detected by abdominal drainage, and shock ensued 20 days postoperatively, emergency abdominal angiography was carried out to identify the bleeding site. A false aneurysm in the proper hepatic artery and extravasation from the gastroduodenal artery stump were recognized, and therefore, the proper hepatic artery and common hepatic artery were embolized at a site distal to the false aneurysm using microcoils. Celiac arteriography after transcatheter arterial embolization (TAE) did not show extravasation, and revealed blood flow from the right inferior phrenic artery to the liver. Liver function was normal after TAE, and the patient recovered and was discharged from the hospital 54 days postoperatively. This paper presents a patient in whom intraabdominal bleeding due to leakage at the site of cholangiojejunostomy complicated by infection was successfully treated by hemostasis with TAE.

Abdomen↗

PubMed1999

A case of lymphoepithelial cyst of the pancreas.

We report a relatively rare case of lymphoepithelial cyst of the pancreas. The patient, a 43-year-old man with no subjective symptoms, was found to have a pancreatic tumor during a physical examination. Based on the ultrasonographic and abdominal computed tomographic findings, a pancreatic cystic tumor was diagnosed. Endoscopic retrograde pancreatography showed a normal duct system. Enucleation was easily performed. Macroscopically, the cyst resembled an atheroma. Histopathologic examination disclosed lymphoepithelial cyst of the pancreas.

Adult↗

PubMed1999

A long-term survival patient with advanced gallbladder cancer massively metastasizing to the liver.

A case of gallbladder carcinoma was reported. A 42-year-old woman was admitted with epigastralgia. Abdominal ultrasonography, computed tomography, and other diagnostic modalities suggested gallbladder carcinoma with multiple liver metastases. These findings indicated no surgical procedure because of the advanced nature of her disease. After the hepatic arterial chemoinfusion therapy, her multiple liver metastatic lesions showed a decrease in size and number. Therefore, extended left lobectomy of the liver with gallbladder and bile duct resection were performed. Five years after initial operation, a solitary liver metastatic lesion (S5) was diagnosed by ultrasonography. Partial resection of the liver was performed for the liver metastasis, and her postoperative recovery was uneventful and had a good follow-up course. One year after the second operation bone metastases occurred, therefore, peroral administration of UFT (Tegafur + Uracil) and radiation therapy for the metastatic lesions of sternum and lumbar vertebra (L1) were performed.

Adult↗

PubMed1998

Adhesion to fibronectin maintains regenerative capacity during ex vivo culture and transduction of human hematopoietic stem and progenitor cells.

Recent reports have indicated that there is poor engraftment from hematopoietic stem cells (HSC) that have traversed cell cycle ex vivo. However, inducing cells to cycle in culture is critical to the fields of ex vivo stem cell expansion and retroviral-mediated gene therapy. Through the use of a xenograft model, the current data shows that human hematopoietic stem and progenitor cells can traverse M phase ex vivo, integrate retroviral vectors, engraft, and sustain long-term hematopoiesis only if they have had the opportunity to engage their integrin receptors to fibronectin during the culture period. If cultured in suspension under the same conditions, transduction is undetectable and the long-term multilineage regenerative capacity of the primitive cells is severely diminished.

Animals↗

PubMed1998

VLA-5 is expressed by mouse and human long-term repopulating hematopoietic cells and mediates adhesion to extracellular matrix protein fibronectin.

Fibronectin (FN), an extracellular matrix protein, is involved in the adhesion and migration of hematopoietic cells and has been shown to enhance retroviral gene transfer into primitive hematopoietic cells by co-localization of target cells and retrovirus when used as a substrate in vitro. We have previously found that mouse hematopoietic stem cells could be transduced on a FN fragment that included the recognition sequence Arg-Gly-Asp (RGD), suggesting that stem cells may express the integrin very late antigen (VLA)-5. To address this, we investigated the binding of mouse and human hematopoietic cells to recombinant peptides that contained one or a combination of the three principle cell-binding domains of FN. These domains included the VLA-5- binding sequence RGD, the VLA-4-binding site CS1, and the high affinity heparin-binding domain. Here we show that mouse long-term in vivo repopulating stem cells, as well as primitive human NOD/SCID mouse repopulating cells, can bind extracellular matrix protein FN by using integrin VLA-5 in vitro. This binding is specific and can be inhibited by antibodies to VLA-5. In addition, preincubation of BM cells with peptide CH-296, which contains all three primary FN-binding domains, decreased the engraftment of cells in the bone marrow in vivo, while intravenous injection of the same peptide induced an increase of progenitor cells in the spleen. In summary, our data demonstrate that VLA-5 is expressed on primitive mouse and human hematopoietic cells and suggest that there may be significant cooperation between integrin receptors and proteoglycan molecules in the engraftment of bone marrow cells and hematopoietic cell adhesion in vivo.

Animals↗

PubMed1998

Enhancement of retroviral gene transduction on a dish coated with a cocktail of two different polypeptides: one exhibiting binding activity toward target cells, and the other toward retroviral vectors.

CH-296, a recombinant fragment of human fibronectin (FN) composed of the cell-binding domain (C-domain), heparin-binding domain II (H-domain), and CS1 site, enhances the retrovirus-mediated gene transduction (GT) of hematopoietic stem cells. The RGD sequence in the C-domain is recognized by a variety of cell types through integrin VLA-5, and the LDV sequence in the CS1-site is recognized by integrin VLA-4. Retrovirus particles were also found to bind to the H-domain. Consequently, the CH-296 fragment can enhance GT through binding to both retrovirus particles and target cells that express integrins VLA-5 and/or VLA-4. In this study, we found that the GT efficiency can be maintained at levels comparable to that of CH-271, a FN fragment similar to CH-296 but lacking the CS1 site, when a cocktail of separated functional domains of CH-271 is used. When a dish was coated with a mixture of the C-domain and H-domain (molar ratio, 1:10), the GT efficiency of NIH3T3 cells reached the same level as that of the mother fragment, CH-271. The H-domain in the cocktail can be replaced with other virus-binding components, polylysine, FGF, and the insulin-binding domain of ColV, without the loss of GT efficiency. With other than FN fragments, a cocktail of erythropoietin and polylysine caused higher GT efficiency of Epo-receptor expressing TF-1 cells than in the case of each component alone.

Animals↗

PubMed1998

Nonfunctioning islet cell carcinoma--a twenty-one years survival case after distal pancreatectomy.

A case of nonfunctioning islet cell carcinoma was reported. A 40-year-old woman was admitted with epigastralgia. Abdominal angiography and other diagnostic modalities suggested pancreatic malignancy. After distal pancreatectomy, histopathological study revealed her pancreatic tumor to be a nonfunctioning islet cell carcinoma. Fourteen years later, postoperative computed tomographic examination (CT) detected the recurrence of para-aortic lymph node metastases. Five years later, distal gastrectomy was performed to control bleeding from a gastric ulcer. Twenty-one years after the original operation, she died because of underlying metastatic carcinoma. In this case, slow growth and a low grade malignancy were characteristic. Operative removal of the tumor would be the treatment of choice even if metastatic lesions existed.

Adenoma, Islet Cell↗

PubMed1997

Optimization of fibronectin-assisted retroviral gene transfer into human CD34+ hematopoietic cells.

Efficient retroviral gene transfer into hematopoietic stem and progenitor cells can be achieved by co-localizing retrovirus and target cells on specific adhesion domains of recombinant fibronectin (FN) fragments. In this paper, we further optimize this technology for human CD34+ cells. Investigating the role of cytokine prestimulation in retrovirus-mediated gene transfer on plates coated with the recombinant FN CH-296 revealed that prestimulation of granulocyte colony-stimulating factor (G-CSF)-mobilized peripheral blood (PB) CD34+ cells was essential to achieve efficient gene transfer into clonogenic cells. The highest gene transfer occurred by prestimulating PB CD34+ cells for 40 hr with a combination of stem cell factor (SCF), G-CSF, and megakaryocyte growth and development factor (MGDF) prior to retroviral infection on CH-296. Surprisingly, a prolonged simultaneous exposure of primary CD34+ PB cells to retrovirus and cytokines in the presence of CH-296 lowered the gene transfer efficiency. Gene transfer into cytokine prestimulated CD34+ bone marrow (BM) cells was not influenced by increasing the coating concentrations of a recombinant FN fragment, CH-296, nor was it adversely influenced by increasing the number of CD34+ target cells, suggesting that the amount of retroviral particles present in the supernatant was not a limiting factor for transduction of CD34+ BM cells on CH-296-coated plates. The polycation Polybrene was not required for efficient transduction of hematopoietic cells in the presence of CH-296. Furthermore, we demonstrated that repeated exposure of CH-296 to retrovirus containing supernatant, called preloading, can be employed to concentrate the amount of retroviral particles bound to CH-296. These findings establish a simple and short clinically applicable transduction protocol that targets up to 68% of BM or G-CSF-mobilized PB CD34+ cells and is capable of genetically modifying up to 17% of CD34+CD38-/dim PB cells.

ADP-ribosyl Cyclase↗

PubMed1997

Coil occlusion of patent ductus arteriosus with detachable coils.

Twenty-five patients (mean age 7.0 +/- 4.8 years) underwent transcatheter coil occlusion of patent ductus arteriosus with detachable coils. The minimum diameter of the ductus arteriosus ranged from 1.0 to 4.2 mm (mean 2.6 +/- 0.9 mm). A single-coil technique was used in 17 patients, double- (six patients) or triple-coil (two patients) techniques were used in eight patients. The coil was not detached until sufficient shape and position of implanted coils were confirmed. All patients had successful implantation of coils regardless of the morphologic characteristics of the ductus. Immediately after the occlusion, heart murmurs were abolished in all patients. Color-flow mapping showed complete closure in 16 (64%) patients immediately after and 20 (80%) patients 1 month after the procedure. No significant complications occurred. The advantages of this detachable coil system may reduce coil migration and allow safer and more reliable execution of this procedure.

Adolescent↗

PubMed1997

Effects of fibronectin fragments on DNA transfection into mammalian cells by electroporation.

Two kinds of cells, human epidermoid carcinoma A431 cells and simian kidney COS-7 cells, were transfected with the chloramphenicol acetyl transferase (CAT) gene by electroporation, and then cultivated on culture dishes coated with two different forms of recombinant fibronectin fragments consisting of cell-binding domain (C-274) or heparin-binding domain and CS1 region (H-296). In the case of A431 cells, H-296-coated dishes significantly increased the amount of expressed CAT and the adhesion of electroporated cells in comparison with non-coated dishes. C-274 was effective for COS-7 cells. Overall, these fibronectin fragments increased the recovery of the transfectants on A-431 cells and COS-7 cells, respectively.

Animals↗

PubMed1997

A study of cognitive development and behavior problems in mentally retarded children.

Cognitive development in seventy-one mentally retarded children (19 autistic, 52 non-autistic; aged 7-19 years) from a school for handicapped children was studied, using Ohta's scale for evaluating cognitive development level based on language comprehension (Ohta's stage), and other developmental scales. Behavior problems were also examined. The present study reports on the utility of Ohta's stage in non-autistic children, and the relationship between cognitive development level and behavior problems in mentally retarded children. In non-autistic children, there were temporal correlations between Ohta's stage and other development scales (a standard developmental test, speech development, symbolic play development, imitation development), suggesting that in non-autistic children as well, Ohta's stage may serve well as a scale for cognitive development, and reflect symbolic representational functioning. In non-autistic children, most behavior problems in feeding, elimination and sleeping, hyperkinesis, hypokinesis, stereotyped behaviors, self-injurious behavior and licking were closely associated with cognitive development level, and were more often noted in children of lower cognitive development level rather than only in the severely mentally retarded children. Some behavior problems may often occur in the sensorimotor period and hardly occur in the symbolic representational period.

Adolescent↗

PubMed1996

Long-term consequences of Kawasaki disease. A 10- to 21-year follow-up study of 594 patients.

BACKGROUND: The long-term consequences of the cardiovascular sequelae in Kawasaki disease remain uncertain. METHODS AND RESULTS: We identified 594 consecutive children with acute Kawasaki disease between 1973 and 1983, and this cohort was followed up for 10 to 21 years (mean, 13.6 years). In all patients, we evaluated coronary lesions by coronary angiography just after the acute stage. One hundred and forty-six patients (24.6%) were diagnosed as having coronary aneurysms. A second angiogram was performed 1 to 2 years later in all 146 patients who previously had coronary aneurysms, which demonstrated that 72 (49.3%) of these 146 had regression in the coronary aneurysm. A third angiogram was performed for 62 patients, a fourth for 29, and a fifth for 17. By 10 to 21 years after the onset of the illness, stenosis in the coronary aneurysm had developed in 28 patients. Myocardial infarction occurred in 11 patients, 5 of whom died. In the 26 patients with giant coronary aneurysms, stenotic lesions developed in 12, and no regression occurred. The 448 patients with normal findings at the first angiogram subsequently never developed any abnormal cardiac findings. Systemic artery aneurysms developed in 13 patients (2.2%), and valvular heart disease appeared in 7 (1.2%). CONCLUSIONS: The incidence of coronary aneurysm in acute Kawasaki disease was 25%, 55% of which showed regression. During follow-up, ischemic heart disease developed in 4.7% and myocardial infarction in 1.9%. Death occurred in 0.8%.

Aneurysm↗

PubMed1996

Colocalization of retrovirus and target cells on specific fibronectin fragments increases genetic transduction of mammalian cells.

Hematopoietic cells are important targets for genetic modification with retroviral vectors. Attempts at human gene therapy of stem cells have achieved limited success partly because of low gene transfer efficiency. Chymotryptic fragments of the extracellular matrix molecule fibronectin used during infection have been shown to increase transduction of human hematopoietic progenitor cells. Here, we demonstrate that this enhanced gene transfer into mammalian target cells is due to direct binding of retroviral particles to sequences within the fibronectin molecule. Transduction of mammalian cells, including murine long-term repopulating hematopoietic cells, is greatly enhanced when cells are adherent to chimeric fragments containing these retroviral binding sequences. In addition, colocalization of retrovirus and target cells on fibronectin peptides allows targeted transduction of specific cell types by exploiting unique ligand/receptor interactions.

Animals↗

PubMed1996

A 31-kDa recombinant fibronectin cell-binding domain fragment: its binding to receptor, cell adhesive activity, and fusion proteins.

The binding of fibronectin to fibronectin receptor was studied using a recombinant 31-kDa cell-binding domain fragment of fibronectin (C279), which consisted of three type III repeats (III8-III9-III10). Fibronectin receptor in several cell lysates was bound to a column of C279-immobilized Sepharose HP and obtained in a highly purified form by elution with a synthetic peptide, GRGDSP. alpha 5 beta 1-Integrin was detected in the GRGDSP-eluted fraction by immunoblotting. The cell-adhesive activity of C279 was inhibited by GRGDSP peptide, an anti-integrin a5 subunit antibody, and an anti-integrin beta 1 subunit antibody. The cell adhesion of fusion proteins of the 31-kDa fragment with biologically interesting polypeptides (heparin-binding domain of fibronectin, and basic fibroblast growth factor) was also studied. In the presence of an anti-integrin a5 subunit antibody, human fibrosarcoma HT-1080 cells attached to the fusion protein containing fibroblast growth factor, giving rise to changes the morphology of the attached cells. The cell adhesion of C279 was inhibited by GRGDSP peptide but that of the fusion protein with the heparin-binding domain of fibronectin was not completely inhibited by the peptide. These results suggest that these biologically interesting polypeptides contribute to the cell adhesion of the fusion proteins.

Amino Acid Sequence↗

PubMed1996

The clinical features of Tourette's disorder with obsessive-compulsive symptoms.

Twenty-three patients with Tourette's disorder (13 with obsessive-compulsive symptoms [OCS] and 10 without) were comparatively investigated. In contrast to OCS-free Tourette's disorder patients, those with OCS were found to be characterized by (i) a higher incidence of volatile temper, (ii) a higher incidence of compulsive tics, (iii) a higher incidence of perinatal disorders and brain wave abnormalities, (iv) a higher severity as rated using the Severity Scale, and (v) a higher prevalence of complications, especially of developmental disorders. Of the subjects with OCS-accompanied Tourette's disorder, approximately half had developed OCS by the onset of tics. These findings suggest the likelihood that OCS-accompanied Tourette's disorder is more strongly associated with organic cerebral disorders, independently of sites of tic disorders, than is OCS-free Tourette's disorder.

Adolescent↗