Difference between hematological malignancy and solid tumor research articles published in four major medical journals.
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Hematologic Neoplasms↗
Biomedical subjects
M Suda
Publications and source records attributed to M Suda.
Plasma des-acyl and acyl ghrelin in patients with eating disorders.
A recently recognized peptide, ghrelin, increases appetite and energy retention in human. Previous reports have shown higher plasma level in eating disorder (ED) patients and correlations with body mass index (BMI). This study examined these findings by measuring active (N-RIA) and total (C-RIA) levels of plasma ghrelin. Multipurpose assessments of symptoms were conducted for 11 ED patients and 5 control females. Results revealed significant differences of C-RIA between the groups. The BMI did not correlate with ghrelin, but demonstrated reversal correlation with the ratio of N-RIA and C-RIA (NC ratio) according to the ED or control group. The NC ratio also tended to be associated with a self-rating score. The NC ratio might be related to specific characteristics of ghrelin secretion or clearance in ED patients. Further basic and clinical investigations are necessary.
Adolescent↗
Molecular detection and quantitative analysis of the entire spectrum of human adenoviruses by a two-reaction real-time PCR assay.
Adenoviruses (AdV) can cause life-threatening infections in immunosuppressed patients. Reliable diagnostic tests are therefore of paramount importance. Apparently, any of the six AdV species (A to F), currently comprising 51 different serotypes, can play a clinically important role in patients with impaired immune response. It is imperative therefore that diagnostic assays cover the entire spectrum of these viruses. We have sequenced presumably conserved regions of the adenoviral genome in all AdV serotypes. Based on the complete sequence information of the hexon gene, we were able to develop a two-reaction real-time PCR assay covering all human adenoviruses with equally high specificity and sensitivity. The detection systems were tested using reference strains for all 51 serotypes and >1,000 clinical samples derived from peripheral blood and stool specimens from pediatric patients after allogeneic stem cell transplantation. The two-reaction assay presented permits highly specific detection and quantification of adenoviral DNA of any serotype. From the perspective of routine clinical diagnosis, the assay represents an important improvement over existing approaches by providing a sensitive and economic technique for early detection and monitoring of adenoviral infections.
Adenovirus Infections, Human↗
Real-time quantitative PCR assays for detection and monitoring of pathogenic human viruses in immunosuppressed pediatric patients.
A panel of 23 real-time PCR assays based on TaqMan technology has been developed for the detection and monitoring of 16 different viruses and virus families including human polyomaviruses BK virus and JC virus, human herpesviruses 6, 7, and 8, human adenoviruses, herpes simplex viruses 1 and 2, varicella-zoster virus, cytomegalovirus, Epstein-Barr virus, parvovirus B19, influenza A and B viruses, parainfluenza viruses 1 to 3, enteroviruses, and respiratory syncytial virus. The test systems presented have a broad dynamic range and display high sensitivity, reproducibility, and specificity. Moreover, the assays allow precise quantification of viral load in a variety of clinical specimens. The ability to use uniform PCR conditions for all assays permits simultaneous processing and detection of many different viruses, thus economizing the diagnostic work. Our observations based on more than 50,000 assays reveal the potential of the real-time PCR tests to facilitate early diagnosis of infection and to monitor the kinetics of viral proliferation and the response to treatment. We demonstrate that, in immunosuppressed patients with invasive virus infections, surveillance by the assays described may permit detection of increasing viral load several days to weeks prior to the onset of clinical symptoms. In virus infections for which specific treatment is available, the quantitative PCR assays presented provide reliable diagnostic tools for timely initiation of appropriate therapy and for rapid assessment of the efficacy of antiviral treatment strategies.
Adolescent↗
Washout measurement of radioisotope implanted by radioactive beams in the rabbit.
Washout of 10C and 11C implanted by radioactive beams in brain and thigh muscle of rabbits was studied. The biological washout effect in a living body is important in the range verification system or three-dimensional volume imaging in heavy ion therapy. Positron emitter beams were implanted in the rabbit and the annihilation gamma-rays were measured by an in situ positron camera which consisted of a pair of scintillation cameras set on either side of the target. The ROI (region of interest) was set as a two-dimensional position distribution and the time-activity curve of the ROI was measured. Experiments were done under two conditions: live and dead. By comparing the two sets of measurement data, it was deduced that there are at least three components in the washout process. Time-activity curves of both brain and thigh muscle were clearly explained by the three-component model analysis. The three components ratios (and washout half-lives) were 35% (2.0 s), 30% (140 s) and 35% (10 191 s) for brain and 30% (10 s), 19% (195 s) and 52% (3175 s) for thigh muscle. The washout effect must be taken into account for the verification of treatment plans by means of positron camera measurements.
Animals↗
Washout studies of 11C in rabbit thigh muscle implanted by secondary beams of HIMAC.
Heavy ion therapy has two definite advantages: good dose localization and higher biological effect. Range calculation of the heavy ions is an important factor in treatment planning. X-ray CT numbers are used to estimate the heavy ion range by looking up values in a conversion table which relates empirically photon attenuation in tissues to particle stopping power; this is one source of uncertainty in the treatment planning. Use of positron emitting radioactive beams along with a positron emission tomograph or a positron camera gives range information and may be used as a means of checking in heavy ion treatment planning. However, the metabolism of the implanted positron emitters in a living object is unpredictable because the chemical forms of these emitters are unknown and the metabolism is dependent on the organ species and may be influenced by many factors such as blood flow rate and fluid components present. In this paper, the washout rate of 11C activity implanted by injecting energetic 11C beams into thigh muscle of a rear leg of a rabbit is presented. The washout was found to consist of two components, the shorter one was about 4.2 +/- 1.1 min and the longer one ranged from 91 to 124 min. About one third of the implanted beta+ activity can be used for imaging and the rest was washed out of the target area.
Animals↗
Antithrombin modulates the leukocyte-endothelial cell interaction in the staphylococcal enterotoxin B-challenged mouse.
BACKGROUND: The beneficial effects of antithrombin on endotoxemia are well known. The purpose of this study was to examine the effects of antithrombin in a supertoxin-induced sepsis. METHODS: Mice were injected with staphylococcal enterotoxin B simultaneously with antithrombin. At 1 hour after injection, the mesenteric microcirculation was observed under intravital microscopy. In addition, humoral mediators were measured at the same time. RESULTS: The number of rolling leukocytes on the endothelium was significantly reduced in the treated mice (p < 0.01). The decrease of white blood cell and platelet counts was significantly inhibited in the treated animals (p < 0.01 for both). A comparison of the intercellular adhesion molecule-1 (p < 0.05), soluble tumor necrosis factor-alpha receptor (p < 0.05), and interleukin-6 (p < 0.01) levels showed less increase in the treated mice. CONCLUSION: Antithrombin showed a protective effects on the microcirculation of staphylococcal enterotoxin B-challenged mice by attenuating leukocyte-endothelial cell interaction. Suppression of adhesive molecule expression and cytokine production appears to play roles in this effect.
Animals↗
Types of programmed cell death: two variants expressed by neonatal murine hepatocytes.
Neonatal livers examined with the terminal transferase-mediated dUTP nick end labeling (TUNEL) method contained numerous positive cells. Although the majority of dying cells are either hematopoietic cells including erythroids and granulocytes or macrophages, a few hepatocytes were also positive. As for the ultrastructural features of these dying hepatocytes, two different types, type I and II, could be identified. The early features of type I appeared in the cytoplasm, which was characterized by dilated rough endoplasmic reticulum, and the cell fragments displayed a round, foamy appearance. Type II was characterized by nuclear compaction and margination of heterochromatin resulting in the formation of sharply circumscribed masses, followed by the condensation of the cytoplasm. The cell death of type I, characterized by the formation of massive vacuolization of the endoplasmic reticulum, corresponds to cytoplasmic type degeneration or nonapoptotic death, while that of type II corresponds to nuclear type cell death or classical apoptotic death. In the two types of programmed cell death, the incidence of nonapoptotic cell death was much higher than that of classical apoptosis in neonatal murine hepatocytes.
Age Factors↗
Effects of 1-bromopropane, 2-bromopropane, and 1,2-dichloropropane on the estrous cycle and ovulation in F344 rats.
The present study was performed to investigate comparatively the toxic effects of inhalation exposure of 1-bromopropane, 2-bromopropane, and 1,2-dichloropropane on reproductive physiology, particularly on the estrous cycle and spontaneous ovulation in female F344 rats. The rats received inhalation exposure to different halogenated propanes, and were exposed daily for 8 h throughout almost 3 weeks to 0,50,200 and 1000 ppm of 1-bromopropane or 2-bromopropane, or to 0,50,100 and 200 ppm of 1,2-dichloropropane. Throughout the exposure period of 1-bromopropane or 2-bromopropane, the ratio of the number of estrous cycle of 6 days or longer to the number of all cycles in both 1000 ppm groups were about two-fold the ratio in each control group, however, no significant difference was found between the ratios of exposed and control groups. The ratios of such long estrous cycles in groups exposed to 100 or 200 ppm of 1,2-dichloropropane were six- to seven-fold higher than that of the control group. These ratios in exposed rats differed significantly from those of controls. The number of ovulated ova in rats exposed to 1,2-dichloropropane decreased in a dose-dependent manner, and the number of ovulated ova in the 200 ppm group was significantly different from that of control rats. Such significant changes in ovulation were not observed in rats exposed to 1-bromopropane or 2-bromopropane. The absolute and relative weights of the ovaries and uterus in rats exposed to three halogenated propanes were not significantly different from those in each control. Therefore, the present study clarified that: (1) 1,2-dichloropropane prolonged the length of the estrous cycle and inhibited spontaneous ovulation in F344 rats; and (2) the potency of 1,2-dichloropropane to disturb the female reproductive physiology appeared to be greater compared with that of 1-bromopropane and 2-bromopropane under the present conditions of inhalation exposure.
Animals↗
Dwarfism and early death in mice lacking C-type natriuretic peptide.
Longitudinal bone growth is determined by endochondral ossification that occurs as chondrocytes in the cartilaginous growth plate undergo proliferation, hypertrophy, cell death, and osteoblastic replacement. The natriuretic peptide family consists of three structurally related endogenous ligands, atrial, brain, and C-type natriuretic peptides (ANP, BNP, and CNP), and is thought to be involved in a variety of homeostatic processes. To investigate the physiological significance of CNP in vivo, we generated mice with targeted disruption of CNP (Nppc(-/-) mice). The Nppc(-/-) mice show severe dwarfism as a result of impaired endochondral ossification. They are all viable perinatally, but less than half can survive during postnatal development. The skeletal phenotypes are histologically similar to those seen in patients with achondroplasia, the most common genetic form of human dwarfism. Targeted expression of CNP in the growth plate chondrocytes can rescue the skeletal defect of Nppc(-/-) mice and allow their prolonged survival. This study demonstrates that CNP acts locally as a positive regulator of endochondral ossification in vivo and suggests its pathophysiological and therapeutic implication in some forms of skeletal dysplasia.
Animals↗
A compactly integrated flow cell with a chemiluminescent FIA system for determining lactate concentration in serum.
We have fabricated an integrated flow cell as a total microanalysis system (microTAS). This flow cell (size, 15 x 20 mm; total inner volume, 12.2 microL) was designed for a rational analyzing system of lactate determination for serum. This cell was made by micromachining techniques and consisted of two hollows of a lactate oxidase (LOD) reactor and a mixing cell, a spiral groove, and three penetrated holes. To form the reactor and capillary, these patterns, etched on a silicon wafer, were attached to a glass plate by the anodic bonding method. A photodiode was put under part of the spiral capillary. The compactly accumulated devices were integrated into a flow injection analysis (FIA) system. In the flow cell, lactate was catalyzed to pyruvate and hydrogen peroxide at the LOD reactor; subsequently, hydrogen peroxide reacted with the luminol-ferricyanic reagent at the mixing cell. The resulting chemiluminescent light was detected by the photodiode. Using the miniaturized flow cell, the sample volume for one measurement was greatly reduced to 0.2 microL. The response to lactate was obtained within 30 s and was linear between 0.5 and 5.0 mM (4.5 and 45 mg/dL) lactate with excellent correlative variances of 3.2% (average of three measurements at 5.0 mM). For practical application, the lactate concentration in control human serum was determined using this system. The results showed a good correlation coefficient (r = 0.979) with the results obtained by the spectrophotometric reference method. No difference in sera (normal or pathological) was found. Consequently, this integrated flow cell shows potential as a clinical device for lactate determination in serum. In this article, the effect of the design on the chemiluminescent FIA system is also described.
Enzymes, Immobilized↗
Kinetics of cytokines and PMN-E in thoracoscopic esophagectomy.
BACKGROUND: Perioperative increases in the levels of cytokines and polymorphonuclear leukocyte elastase (PMN-E) have been shown to be related to degree of surgical trauma. METHODS: We measured the changes in levels of interleukin-6 (IL-6), interleukin-8 (IL-8), and PMN-E in the perioperative period in patients undergoing thoracoscopic esophagectomy (n = 15) and conventional transthoracic esophagectomy (n = 15) for thoracic esophageal cancer. RESULTS: Both IL-6 and IL-8 increased markedly immediately after transthoracic esophagectomy and thereafter, but only a slight increase was observed after the thoracoscopic procedure (IL-6: p = 0.047; IL-8: p = 0.03). A difference was also seen in the pattern of changes in PMN-E. Levels of PMN-E increased immediately after transthoracic esophagectomy and continued to be high up to the 3rd postoperative day, but they remained low after the thoracoscopic procedure and showed no increase (p <lt; 0.01). CONCLUSION: These results suggest that, compared with transthoracic esophagectomy, thoracoscopic esophagectomy results in less production of cytokines and PMN-E and thus causes less surgical trauma.
Cytokines↗
Localization of mitochondrial ribosomal RNA on the chromatoid bodies of marine planarian polyclad embryos.
Electron-dense cytoplasmic structures, referred to as chromatoid bodies, are observed in the somatic stem cells, called neoblasts, and germline cells in adult planarians. Although it has been revealed that the chromatoid bodies morphologically resemble germline granules in Drosophila and Xenopus embryos, what essential role it plays in the planarian has remained unclear. In the present study, to examine whether chromatoid bodies in planarian embryos are responsible for germline formation, the presence and behavior of chromatoid bodies during embryogenesis were examined. Mitochondrial large ribosomal RNA and mitochondrial small ribosomal RNA were used as candidate markers for components of the chromatoid body. Starting from the fertilized egg, extramitochondrial signals of both RNA (mtrRNA) were observed. At the ultrastructural level, mtrRNA were localized on the surface of the chromatoid bodies. At subsequent stages, the signals of mtrRNA were observed in certain restricted blastomeres that contribute to the formation of larval structures. The signals gradually decreased from the gastrula stage. These results suggest that the chromatoid bodies associated with mtrRNA in embryogenesis are not germline granules. The chromatoid bodies of blastomeres may be concerned with the toti- or pluripotency and cell differentiation as proposed in adult planarian neoblasts.
Animals↗
Stomach is a major source of circulating ghrelin, and feeding state determines plasma ghrelin-like immunoreactivity levels in humans.
Ghrelin, an endogenous ligand for the GH secretagogue receptor, was isolated from rat stomach and is involved in a novel system for regulating GH release. Although previous studies in rodents suggest that ghrelin is also involved in energy homeostasis and that ghrelin secretion is influenced by feeding, little is known about plasma ghrelin in humans. To address this issue, we studied plasma ghrelin-like immunoreactivity levels and elucidated the source of circulating ghrelin and the effects of feeding state on plasma ghrelin-like immunoreactivity levels in humans. The plasma ghrelin-like immunoreactivity concentration in normal humans measured by a specific RIA was 166.0 +/- 10.1 fmol/ml. Northern blot analysis of various human tissues identified ghrelin mRNA found most abundantly in the stomach and plasma ghrelin-like immunoreactivity levels in totally gastrectomized patients were reduced to 35% of those in normal controls. Plasma ghrelin-like immunoreactivity levels were increased by 31% after 12-h fasting and reduced by 22% immediately after habitual feeding. In patients with anorexia nervosa, plasma ghrelin-like immunoreactivity levels were markedly elevated compared with those in normal controls (401.2 +/- 58.4 vs. 192.8 +/- 19.4 fmol/ml) and were negatively correlated with body mass indexes. We conclude that the stomach is a major source of circulating ghrelin and that plasma ghrelin-like immunoreactivity levels reflect acute and chronic feeding states in humans.
Adult↗
Alternating paroxysmal hemiballism-hemichorea in bilateral internal carotid artery stenosis.
A 72-year-old man presented with paroxysmal and transient involuntary movements, or "limb shaking". The attacks occurred alternately from one side of the body to the other and ceased spontaneously. Surface EMG study showed synchronous grouping discharges in multiple limb muscles, being compatible with hemiballism-hemichorea. Cerebral angiography demonstrated marked stenosis of the bilateral internal carotid arteries. Bilateral carotid endarterectomy led to complete disappearance of the involuntary movements. Alternating paroxysmal hemiballismhemichorea might be a transient ischemic attack, and alternating striatal dysfunction induced by cerebral hemodynamic or microembolic ischemia probably plays a central role in the occurrence of such involuntary movements.
Aged↗
[Clinical features of autosomal dominant spinocerebellar ataxias genetically unclassified into any known triplet-repeat diseases].
To clarify the clinical features of genetically unclassified autosomal dominant spinocerebellar ataxias (AD-SCAs) treated in our hospital, we retrospectively analyzed the clinical findings of patients who could not be molecularly classified into SCA types 1 through 3, 6 through 8, 12 and dentato-rubro-pallido-luysian atrophy (DRPLA). The clinical findings of 19 patients from 15 different families which form 14 percent of all patients with different types of AD-SCAs (136 patients, 105 families) were collected. Based on these, 17 patients from 13 families showed late-onset (mean age at onset: 46 years old) and slowly progressive truncal and limb ataxias of cerebellar origin. Some of them showed gaze-evoked nystagmus, increased deep reflexes without Babinski sign, tremor, mildly decreased vibration sense and mild rectourinary disturbances. All but one were still ambulatory after 15 years of their mean disease duration. An earlier disease onset in successive generations was observed in 8 families. Brain MRIs revealed cerebellar atrophy predominantly in the anterior vermis in all the patients and mild brainstem atrophy in only 3 patients. Although the clinical phenotype manifested by most of the genetically unclassified AD-SCAs is similar to that of SCA6, whether the phenotype is caused by expansion of triplet repeats or some mutations in a single gene or different mutations in various genes is still unclarified.
Adult↗
[The efficacy of combination chemotherapy of 5'-deoxy-5-fluorouridine (5'-DFUR), cyclophosphamide (CPA) and medroxyprogesterone acetate (MPA) for bone metastasis in breast cancer patients].
5'-DFUR is a pro drug of 5-FU, which is known to be converted by thymidine phosphorylase (dThdPase). A recent pre-clinical study revealed that CPA upregulates dThdPase activity specifically in tumor cells. Furthermore, clinical trials have shown significant response rates in breast cancer patients, when using the chemotherapy combination of 5'-DFUR, CPA and MPA. The purpose of this study was to examine the efficacy of this regimen as a pain reduction therapy for breast cancer patients with bone metastasis. Ten patients who had bone metastasis with restricted ADL were included in the study. All of the patients had had previous exposure to such standard chemotherapy as CAF, CMF, taxol and oral 5-FU administration. The patients were administered daily oral doses of 5'-DFUR at 800-1,200 mg, CPA at 200 mg and MPA at 400-800 mg for two weeks as induction therapy, followed by two weeks rest (one to two cycles). Daily dose of 800 mg of 5'-DFUR, 100 mg of CPA, 400-800 mg of MPA was continuously administered thereafter. The main findings included a significant decrease in pain in eight patients, which continued for more than 6 months. In five patients, the effect lasted more than one year. As the pain decreased, the patients' QOL was improved. Hematological toxicity of more than grade 3 was observed in three patients but only during the induction therapy. One patient had pulmonary thrombosis and required hospitalization. In conclusion, oral administration of 5'-DFUR/CPA/MPA is well tolerated and useful in reducing pain.
Adult↗
[Ultrastructural studies of hepatoblast junctions and liver hematopoiesis of the mouse embryo].
To clarify the morphological changes in hepatoblast connections during the development of fetal liver hematopoiesis, ICR mouse livers of 11 to 19 days of gestation were studied by means of three-dimensional reconstruction, immunohistochemistry, electron microscopy and freeze fracture replica method. Embryonic liver weight showed rapid increase until 19 days of gestation, and an initial steep increase, due to hematopoietic development, was observed at 13 to 15 days of gestation. Hepatoblast volume appeared to be constant until 13 days of gestation, and, thereafter, showed a gradual increase. An 11-day primitive hepatic cord contained a few immature hematopoietic cells among hepatoblasts, and the hepatoblasts made contact with one another by short cytoplasmic projections. The area of the contact surface had a diameter of 4-5 microns, where E-cadherin-mediated adherens junctions were found. At 12-13 days of gestation, hepatoblasts surrounded large ellipsoidal hematopoietic foci, with long cytoplasmic projections. In addition to the adherens junctions, small desmosomes appeared to bind hepatoblasts together, and biliary canaliculi could be recognized between hepatoblasts. At peak stage of liver hematopoiesis at 14 days of gestation, both tight junctions and gap junctions appeared around the biliary canaliculi, and four types of specialized junctions, i.e., adherens junctions, desmosomes, tight junctions and gap junctions, appeared to be fully developed. After 15 days of gestation, hepatocyte volume showed rapid increase, and the surface areas between adjacent hepatocytes were markedly enlarged. As a result, the involuted hematopoietic foci were forced to move from interhepatocytic spaces to perisinusoidal space at the end of the intrauterine life.
Animals↗