Effects of anti-IgE monoclonal antibody on a primary infection of Strongyloides ratti in mice.
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Animals↗
Biomedical subjects
I Tada
Publications and source records attributed to I Tada.
Morphological features of spermatozoa of Paragonimus ohirai (Trematoda: Platyhelminthes) examined by a silver nitrate staining technique.
The mature thread-like spermatozoon of Paragonimus ohirai was shown to be composed of 7 distinct segments which have morphologically different characteristics, following staining with silver nitrate. The first segment (1S) is a needle-shaped structure with a perforatorium. The 2S is composed of two filaments loosely paired; 3S consists of a somewhat coarse thread (vestige of the cytoplasmic projection); 4S is composed of two flagella tightly paired; in 5S, two silver-positive filaments are independently seen as in 2S; 6S has a 'spiral' structure composed of two flagella; in 7S, two filaments are seen dissociated from each other. The sperm nucleus exists within the 'spiral' structure of 6S and this structure may serve to hold and/or protect the nucleus. The technique presented here is useful for gross morphological observations of the long sperm of flatworms.
Animals↗
[Efficacy of anticancer agent-lipiodol emulsion for hepatic arterial infusion and regional hyperthermia in patients with nonresectable hepatoma].
The efficacy of combination therapy of anticancer agent-Lipiodol Emulsion for hepatic arterial infusion and regional hyperthermia was studied in 102 patients with nonresectable hepatoma. 5-FU, MFA, CDDP and MFA-CDDP were used as anticancer agents in 13, 44, 26 and 19 patients, respectively. One year survival rates of the each group were 9% (1/13, 5-FU-treated), 29% (12/44, MFA-treated), 43% (11/26, CDDP-treated) and 55% (10/19, MFA-CDDP-treated). Tumor regression was found in one out of 11 (9.1%), 11 out 41 (26.8%), 6 out of 23 (26.1) and 9 out of 19 patients (47.4%), respectively. The regional hyperthermia was particularly efficacious for patients with advanced hepatoma (E3 and E4) and clinical stage II, III; 5 out of 32 patients (16%) receiving arterial infusion and hyperthermia survived more than 1 year while all 15 patients without hyperthermia died within 11 months (p less than 0.01). Our data indicate that repeated arterial infusion of MFA and CDDP Lipiodol Emulsion was most effective for nonresectable liver cell cancer, and the regional hyperthermia prolonged the survival of patients who had advanced hepatoma with poor liver function.
Antineoplastic Combined Chemotherapy Protocols↗
Hematopoietic recovery in a patient with acute lymphoblastic leukemia after an autologous marrow graft purged by combined hyperthermia and interferon in vitro.
We describe a patient with acute lymphoblastic leukemia (ALL) in whom hemopoiesis recovered after an autologous marrow graft purged by in vitro hyperthermia. A 17-year-old woman was diagnosed as having ALL in April 1985. After clinical remission was induced, marrow cells were harvested. The marrow cells were treated with hyperthermia at 42.0 degrees C for 1 h in the presence of alpha-interferon to eliminate residual leukemic cells, and then cryopreserved. In January 1990, during her fourth remission she was treated with busulfan and cyclophosphamide, and then received the thawed autologous marrow. Her hematopoietic recovery was prompt with normal trilineage regeneration without any life-threatening complications. She is in good health without evidence of a leukemic relapse at 6 months after autologous bone marrow transplantation. This case suggests that human multilineage progenitor cells retain self-renewal capacity in vivo even after treatment with heat and alpha-interferon in vitro followed by the freezing and thawing procedures.
Adolescent↗
[Quantitative measuring method for fibers using image processing and analysis].
Previously, the radioisotope labeling and morphometric techniques have been used for the quantitative determination of growth of mandibular condyle by measuring the DNA synthesis or the increased number of cells. However, it is difficult to analyze the dynamics of ESFs (Elastic System Fibers) in the mandibular condyle related to aging, because of changes in the amount, distribution, number of fibers, and density of ESFs. In the present study, therefore, the video-scanning image analyzing technique was used for the quantitative measurement of ESFs in the mouse mandibular condyle. The objects under selected suitable illumination are scanned and focused by the TV camera and lens. The focused image is converted and amplified to obtain the most reliable electric signal by sequential scanning with the relative electronic beam. The original shaded image (electric signals) generated and converted by photo electric converter was filtered by the input slope (detective sensitivity) to detect the relative objects. Next, by inputted contrast, a secondary black-and-white image was detected. Meanwhile, a suitable compensation was also used to eliminate electric noise and dusts by inputting size discrimination. The next step was designed to obtain various quantitative data by measuring areas and diameters of the relative objects after treatment and analyzing of the secondary image, which was outputted from the photo electric converter. The connected LED display showed the measured and counted data, and at the same time the obtained data was automatically printed out for recording. There are many samples that are impossible to distinguish without using specific staining methods, like the ESFs.(ABSTRACT TRUNCATED AT 250 WORDS)
Animals↗
The role of interleukin-5 in protective immunity to Strongyloides venezuelensis infection in mice.
We depleted or neutralized interleukin-5 (IL-5) and IL-5 receptor of C57BL/6 mice, using rat anti-murine IL-5 monoclonal antibody (NC17) and anti-murine IL-5 receptor monoclonal antibody (H7). Mice treated with these monoclonal antibodies were infected with Strongyloides venezuelensis larvae. The time-course of faecal egg output and peripheral eosinophilia were monitored. In a primary infection, anti-IL-5 treatment did not affect faecal egg output, although the eosinophil count in peripheral blood was markedly reduced. There was no difference in intestinal worm burden or faecal egg output between anti-IL-5 treated and non-treated mice. In a secondary infection, worms were expelled from the small intestine of anti-IL-5-treated mice as well as from non-treated mice. Worm recovery from the lungs of mice treated with either anti-IL-5 or anti-IL-5 receptor monoclonal antibody was the same as that of normal controls. However, a marked reduction in worm recovery was observed in re-infected mice that had not been treated with monoclonal antibodies. Treatment with anti-IL-5 or anti-IL-5 receptor monoclonal antibody suppressed blood and tissue eosinophilia. Thus the results suggested that the host's protective immunity against tissue-migrating larvae was IL-5-dependent but intestinal immunity was not.
Animals↗
Analysis of polyunsaturated fatty acid composition of Strongyloides ratti in relation to development.
The effect of linolenic acid (C18:3 omega 3) on the development of Strongyloides ratti first-stage larvae (L1) in culture was studied. The fatty acid composition of S. ratti free-living generations was analyzed by gas chromatography. L1 had abundant linoleic acid (C18:2 omega 6) but its proportion decreased with development. On the contrary, eicosapentaenoic acid (C20:5 omega 3) and C20:4 omega 3 were prominent in the filariform larva (L3). Because C20:5 omega 3 is generally synthesized from C18:3 omega 3 via C20:4 omega 3, the high ratio of C20:5 omega 3/C18:3 omega 3 of L3 in all the free-living generations suggested that polyunsaturated fatty acid metabolism, particularly the omega-3 series, and eicosanoids produced had important roles in the development of S. ratti L1.
Animals↗
[Efficacy of concentrated CDDP-lipiodol emulsion for hepatic arterial infusion therapy in patients with nonresectable hepatoma].
The efficacy of concentrated CDDP-Lipiodol Emulsion was experimentally and clinically studied in the treatment of nonresectable hepatoma. The commercially available CDDP was ten-fold concentrated into water in oil form. The agent was administered via hepatic artery in 26 patients with nonresectable hepatocellular carcinoma. In vitro and clinical studies strongly suggested a gradual release of the CDDP into the surrounding tissue. In 9 out of 26 patients (34.6%), tumor regression was found. Side effects were minimum; mild nausea and vomiting were observed in only 13 patients. On the basis of our preliminary study, concentrated CDDP-Lipiodol emulsion promises to be a useful agent for the treatment of nonresectable hepatocellular carcinoma.
Carcinoma, Hepatocellular↗
Double cancer of the liver and stomach with situs inversus totalis--a case report.
A case of a 66-year-old woman with situs inversus totalis who developed hepatocellular carcinoma (HCC) as well as stomach cancer, is reported herein. The patient was successfully treated with a left hepatic lobectomy for the HCC and a B-I gastrectomy for the stomach cancer. Careful anatomical mapping made it possible to perform a combined resection of the liver and stomach in the presence of this congenital anomaly.
Aged↗
The acquirement of growth ability for third-stage larvae of Strongyloides ratti during the head-passage in the rat.
The role of larval passage through the head in the course of the migration of Strongyloides ratti in rats was investigated. Third-stage larvae (L3) recovered from various portions of donor rats were re-injected into the skin, cranial cavity and small intestine of recipient rats to check their ability for further growth. Cultured L3 (L3c) and the L3 recovered from the skin of donor rats (L3s) did not survive in the small intestine after intestinal inoculation. However, intestinal inoculation of L3 recovered from the head of donor rats (L3h) revealed growth to the adult stage. Cultured L3 injected into the cranial cavity of rats also became adult worms in the small intestine. L3 incubated in the cranial cavity for more than 24 h could grow in the small intestine of the recipient rats. These experiments suggest that S. ratti L3 acquire their ability to mature in the small intestine during their migration through the head of rats.
Animals↗
The effect of fatty acids on the developmental direction of Strongyloides ratti first-stage larvae.
The effect of fatty acids was studied on the developmental direction of Strongyloides ratti first-stage larvae (L1). The proportion of third-stage infective larvae increased markedly when L1 were cultured in faeces with added fatty acids such as palmitic (C16), stearic (C18), oleic (C18:1) and linoleic (C18:2) acids. Unsaturated fatty acids were more effective than saturated ones. Moreover, the proportion of infective larvae increased with quantity of linoleic acid but the triacylglycerols of any fatty acid had no effect. These results suggest that these free fatty acids cause physiological changes that determine the developmental course of L1 of S. ratti in nature.
Animals↗
An electron microscopic study of hepatic angiomyolipoma.
Three cases of hepatic angiomyolipoma, each composed of an intimate mixture of numerous abnormal blood vessels and various-sized fat, spindle and/or epithelioid cells, are presented along with the findings of an electron microscopic study. The spindle cells were confirmed to be smooth muscle by immunohistochemical staining for desmin and by their ultrastructural characteristics. The mature fat cells, smooth muscle cells, immature short spindle cells apparently intermediate or transitional between the former two cell types, and the epithelioid cells were observed adjacent to the endothelial cells. Ultrastructurally, the epithelioid cells were characterized by unusual cytoplasmic organelles such as myofilaments having focal densities and dense attachments, numerous large electron-dense bodies, and a large number of glycogen particles and lipid droplets. Therefore, it is considered that the immature short spindle and epithelioid cells in hepatic angiomyolipoma might be primitive mesenchymal cells having an ability to differentiate toward both smooth muscle and fat cells.
Adult↗
[A case of recurrent hepatocellular carcinoma successfully treated by arterial chemoembolization in combination with local hyperthermia].
We report a long-term survival case of recurrent hepatocellular carcinoma (HCC). A 40-year-old woman suffering advanced HCC underwent right hepatic tri-segmentectomy. After the surgery, HCC recurred in the remnant liver and lung. An arterial infusion of Lipiodol emulsion of anti-cancer agents and regional hyperthermia therapy were repeatedly performed. Administration of FT and PSK were also started. After this combined therapy, AFP levels decreased and recurrent lesions in the liver as well as pulmonary metastases disappeared on image studies. The patient is doing well 4 and half years later with no evidence of recurrence.
Adult↗
SEM study on the dentin and cementum of oreodont teeth.
An SEM study on the dental hard tissue was conducted on the canines and molars removed from a fossil oreodont. The orthodentin was densely distributed with dentinal tubules measuring 2.2 microns in diameter; the tubules were filled with their related odontoblastic processes. They coursed in a parabolic fashion from the pulpal aspect towards the tooth surface. There were many fine lateral offshoots that branched from the tubules, such that the mantle dentin measuring 50 microns in thickness was mostly distributed with these terminal branches measuring 0.7 micron in diameter. However, they did not intrude into the enamel to form spindles and rods. SEM study indicated that the uneven surface of the tubular wall was due to a crisscross of the underneath dentinal matricial fibers, and the peritubular dentin was not observed. The superficial circumpulpal dentin was distributed with interglobular dentin, while the radicular dentin beneath the cementum was additionally distributed with a granular layer. We also observed concentric lamellae corresponding to incremental lines in the dentin, as well as a flat wavy dentinoenamel junction. We noticed the radicular dentin was covered with an acellular cementum except at the apical portion, where it was paved with cellular cementum.
Animals↗
Novel C-banding patterns in Paragonimus ohirai (Trematoda: Platyhelminthes).
The C-banding pattern for the karyotype of Paragonimus ohirai representing individuals in a new population is reported. The short arm of chromosome 4 consisted of a large pericentromeric proximal C-band block and euchromatic tip. This pattern has not been observed previously and is designated as type E. Other new observations were: chromosome 5 was composed of pericentromeric heterochromatin, a lightly stained intercalary band at the middle portion of the short arm, and a lightly stained interstitial band at the terminal region of the long arm. Chromosome 7 consisted of pericentromeric heterochromatin and a lightly stained telomeric band at the short arm.
Animals↗
Giant hepatic angiomyolipoma simulating focal nodular hyperplasia.
A case of hepatic angiomyolipoma occurring in a 41-year-old woman, the eighteenth case in literature, is reported herein. The radiographic imagings of the tumor simulated those of focal nodular hyperplasia; namely, the tumor was hyperechoic on ultrasound, hypodense on computed tomography, hypervascular on angiography, and exhibited an uptake of technetium (Tc)-99m phytate. The diagnosis was established after successful removal of the huge tumor from the right hepatic lobe. Histologically, the tumor was angiomyolipoma which was made up of three components, blood vessels, smooth muscle and fatty tissue. Furthermore, extramedullary hematopoiesis, which is usually seen in this tumor was confirmed. The differentiation of hepatic angiomyolipoma from FNH is also discussed.
Adult↗
Monoclonal antibodies specific for Onchocerca volvulus as determined by immunofluorescence.
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Animals↗
The vectoral role of several blackfly species (Diptera: Simuliidae) in relation to human onchocerciasis in the Sierra Parima and Upper Orinoco regions of Venezuela.
Experimental and natural infections with Onchocerca volvulus were studied in several anthropophilic blackfly species present in the endemic area of the Upper Orinoco region of Venezuela. When fed on four different Yanomami volunteers in the Sierra Parima, the total infection rate was 31.4% for Simulium guianense in comparison with 7.5% for S. limbatum. The proportion of ingested microfilariae that entered the thorax during the first 24 hours and completed development to the infective stage was also much lower in the latter than in the former species. There was no larval development of O. volvulus in S. antillarum, but one female harboured in its head six infective larvae of a zoonotic filaria. When S. oyapokense s.l. was fed on an infected volunteer in the Upper Orinoco most flies ingested few microfilariae, and further development reached only the L1 stage. Natural infection and infectivity rates for S. guianense in two localities of the Sierra Parima were 0.2-4.0% and 1.3-10.2%, respectively, more than 50% of the L3 larvae being in the head. The corresponding data for S. oyapockense s.l. in the Upper Orinoco were 0.1-0.5%, although the only L3 larva found did not correspond to O. volvulus. It is suggested that S. guianense is the main vector of onchocerciasis in the Sierra Parima and that S. limbatum could play a secondary role. Simulium oyapockense s.l. replaces them in the Upper Orinoco and may maintain a degree of transmission, but its epidemiological importance remains to be assessed.
Animals↗