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Biomedical subjects

I Honda

Publications and source records attributed to I Honda.

At least 19 recordsLinked to original sources
PubMed2004

Identification and mapping of cleistogamy genes in barley.

Cleistogamy is a closed type of flowering with ensured self-pollination and an important trait to study evolutionary development in flower organs, reproduction systems, gene flow, and disease control. Still, very limited information is available about the genetic control and regulatory mechanism of this trait in barley. In this work, from the eight crosses between cleistogamous and chasmogamous accessions, five crosses generated chasmogamous F1 plants and their F2 plants segregated as 3 chasmogamous:1 cleistogamous, whereas three crosses generated cleistogamous F1 plants, and their F2 plants segregated as 1 chasmogamous:3 cleistogamous. Although a single gene was responsible for the control of cleistogamy in these two groups of crosses, the direction of dominance was opposite, suggesting two genes, cly1 and Cly2, for the genetic control of cleistogamy in barley. Epistatic type of gene interaction between the two loci was detected. In the analysis of 99 recombinant inbred lines of 'Azumamugi' x 'Kanto Nakate Gold' and doubled haploid lines of 'Harrington' x 'Mikamo Golden', where in both crosses F1 was chasmogamous, the cly1 locus has been mapped on chromosome 2HL. Using the analysis of the F2 population of 'Misato Golden' and 'Satsuki Nijo' where F1 was cleistogamous, the Cly2 locus was mapped in the same region of chromosome 2HL. Because the cly1 and Cly2 loci were mapped in the same region in these three different mapping populations, it was concluded that the expression of cleistogamy is under the control of two tightly linked genes or different alleles of the same gene.

Chromosome Mapping↗
PubMed2001

Lymph node metastasis and preoperative diagnosis of depth of invasion in early gastric cancer.

BACKGROUND: No reports have, to date, focused on the relationship between preoperative determination of the depth of invasion and lymph node metastasis. The present study, under the leadership of the Japanese Gastric Cancer Association, was designed to form a basis for decision making in limited treatment for early gastric cancer (EGC). METHODS: From eight major hospitals in Japan, 2672 gastric cancers whose preoperative depth of invasion was mucosal(M-cancer), and 6209 EGCs, consisting of 3584 mucosal(m-) and 2625 submucosal(sm-) cancers, were collected by questionnaire. All registered patients underwent gastrectomy with D1 or more extensive lymphadenectomy between 1985 and 1998. RESULTS: The accuracy of preoperative diagnosis of depth of invasion of M-cancers was 80.2% (2144/2672). However, of the total of 2432 M-cancers in which no nodal involvement was observed intraoperatively (N0), histological examination of the resected specimens confirmed that lymph node metastasis was absent in 2353 (96.8%). The frequencies of lymph node metastasis in early gastric, m-, and sm-cancers were 8.9%, 2.5%, and 17.6%, respectively. Node involvement was associated with a higher frequency of undifferentiated than differentiated histology, as well as with greater tumor size. The incidences of lymph node metastasis in m-cancers with a diameter of less than 4 cm, and in sm-cancers with a diameter below 1 cm were 1.3% (37/2837) and 4.9% (4/82), respectively. These metastases rarely extended beyond the first tier. CONCLUSION: N0 and M-cancers, m-cancers less than 4 cm in diameter, and sm-cancers no larger than 1 cm in diameter may be appropriate indications for limited surgery.

Chi-Square Distribution↗
PubMed2001

Surgical treatment for pancreatic metastasis from soft-tissue sarcoma: report of two cases.

We present two cases in which a soft-tissue sarcoma metastasized to the pancreas, but both patients survived as a result of repetitive surgical treatment during a 6- to 10-year period. The first case was a 29-year-old man who had a history of removal of mesenchymal chondrosarcoma in the left thigh in 1986 and who underwent distal pancreatectomy and the enucleation of a tumor in the head of the pancreas because of the development of three metastatic lesions in 1989. Afterward, although metastases were found in other organs, they were resected each time (for a total of five times) and the patient has survived over 10 years. The second case was a 40-year-old woman who had a history of the removal of synovial sarcoma in the right thigh and had 6 surgical resections of local or pulmonary recurrent tumors. She underwent pylorus-preserving pancreaticoduodenectomy in 1993 because of the development of a solitary metastatic lesion in the pancreas and survived more than 6 years after the pancreatectomy. Our report suggests, in selected cases, that long-term survival from pancreatic metastasis of soft-tissue sarcoma is expected as a result of curative resection. However, because pancreatic metastasis has a potential to recur in other organs, it is necessary to take aggressive surgical procedures repeatedly for the treatment of recurrences to improve prognosis after pancreatectomy.

Adult↗
PubMed2001

Th1 adjuvant N-acetyl-D-glucosamine polymer up-regulates Th1 immunity but down-regulates Th2 immunity against a mycobacterial protein (MPB-59) in interleukin-10-knockout and wild-type mice.

Treatment of mice with heat-killed (HK) Mycobacterium bovis BCG or 1- to 10-microm chitin particles (nonantigenic N-acetyl-D-glucosamine polymers) is known to induce innate immune responses, including gamma interferon (IFN-gamma) production, which plays a Th1 adjuvant role. However, HK BCG further induces prostaglandin E2-releasing spleen macrophages (Mphi) (PGE2-Mphi), which potentially inhibit Th1 adjuvant activities. We found that chitin particles did not induce PGE2-Mphi formation. To further assess whether chitin has Th1 adjuvant effects, interleukin-10 (IL-10)-knockout (KO) mice and their wild-type (WT, C57BL/6) controls were immunized with a 30-kDa MPB-59 mycobacterial protein mixed with chitin. Immunization with MPB-59 alone induced Th2 responses, characterized by increases in total serum immunoglobulin E (IgE) and specific serum IgG1 levels and spleen Th2 cells producing IL-4, IL-5, and IL-10. No IFN-gamma-producing spleen Th1 cells, specific serum IgG2a, or delayed-type hypersensitivity (DTH) footpad reactions were detected. On the other hand, chitin-MPB-59 immunization significantly increased spleen Th1 responses, DTH reaction, and serum IgG2a levels along with decreases of Th2 responses. The magnitude of these Th1 adjuvant effects was greater in IL-10-KO mice than in WT mice. In contrast, immunization with HK BCG-MPB-59 showed little or no Th1 adjuvant effect. These data indicate that chitin has a unique Th1 adjuvant effect on the development of Th1 immunity against a mycobacterial antigen. IL-10 down-regulates the adjuvant effect of chitin.

Acetylglucosamine↗
PubMed2001

Nurses' comprehension and recall process of a patient's message with double-bind information.

We examined nurses' comprehension and recall process of patients' passage with double-bind information. We focused on two modes of communication, tone of voice and content of speech. The experiment followed a 2 x 2 x 2 design with respect to listeners (nurse vs student), tone of voice (positive vs negative), and verbal content (positive vs negative). Subjects were 79 nurses who worked at the university hospital and 99 students who were studying at the Faculty of Nursing. Nurses and students were randomly divided into four subgroups; each was presented one of four professionally tape-recorded scripts representing one possible combination of tone of voice and verbal content on the part of a fictitious patient. Listeners then rated the passages on scales and were asked to recall the passages in detail. Listeners recalled and understood passages better when the modes of communication did not conflict. Accuracy in recall reflected comprehension of passages rather than the listener's feelings about the "patient," especially in double-bind situations. Listeners tended to judge the speaker's feelings by tone of voice rather than verbal content.

Adult↗
PubMed2001

[A case of post-tuberculosis chronic empyema with effective low-dose, long-term clarithromycin administration].

A 78-year-old woman with post-tuberculosis chronic empyema who underwent unsuccessful decortication in July 1993, was admitted to our hospital in November 1994 because of M. tuberculosis in her sputum. One month after anti-tuberculosis treatment, the M. tuberculosis disappeared from the sputum, but a pleurocutaneous fistula that exuded abundant bloody pus containing Pseudomonas aeruginosa persisted in the area of chronic empyema. In July 1997, 200 mg of clarithromycin (CAM) was administered daily; 21 months later, the pus and pleurocutaneous fistula had disappeared. Post-tuberculosis chronic empyema with a fistula is generally an intractable condition that necessitates surgery. In this case, the empyema did not improve during the 4 years after the surgery. However, low-dose, long-term CAM administration brought about a disappearance of pus from the fistula and closure of the empyema spaces.

Aged↗
PubMed2000

Re-evaluation of phorbol ester-induced potentiation of transmitter release from mossy fibre terminals of the mouse hippocampus.

To investigate the mechanisms by which phorbol esters potentiate transmitter release from mossy fibre terminals we used fura dextran to measure the intraterminal Ca2+ concentration in mouse hippocampal slices. A phorbol ester, phorbol 12,13-diacetate (PDAc), potentiated the field excitatory postsynaptic potential (fEPSP) slope. PDAc also enhanced the stimulation-dependent increase of [Ca2+]i in the mossy fibre terminal (Delta[Ca2+]pre). The magnitude of the PDAc-induced fEPSP potentiation (463+/-57% at 10 microM) was larger than that expected from the enhancement of Delta[Ca2+]pre (153+/-5%). The Delta[Ca2+]pre was suppressed by omega-agatoxin IVA (omega-AgTxIVA, 200 nM), a P/Q-type Ca2+ channel-specific blocker, by 31%. The effect of PDAc did not select between omega-AgTxIVA-sensitive and -resistant components. The PDAc-induced potentiation of the fEPSP slope was partially antagonized by the protein kinase C (PKC) inhibitor bisindolylmaleimide I (BIS-I, 10 microM), whereas the Delta[Ca2+]pre was completely blocked by BIS-I. Although the BIS-I-sensitive fEPSP potentiation was accompanied by a reduction of the paired-pulse ratio (PPR), the BIS-I-resistant component was not. Whole-cell patch clamp recording from a CA3 pyramidal neuron in a BIS-I-treated slice demonstrated that PDAc (10 microM) increased the frequency of miniature excitatory postsynaptic currents (mEPSCs, 259+/-33% of control) without a noticeable change in their amplitude (102+/-5% of control). These results suggest that PKC potentiates transmitter release by at least two distinct mechanisms, one Delta[Ca2+]pre dependent and the other Delta[Ca2+]pre independent. In addition, some phorbol ester-mediated potentiation of synaptic transmission appears to occur without activating PKC.

Action Potentials↗
PubMed2000

Direct measurement of mammographic x-ray spectra using a CdZnTe detector.

Our purpose is to directly measure mammographic x-ray spectra with collimators and a low-efficiency CdZnTe detector developed recently and to find out the best fit response function of CdZnTe detector to correct the measured spectra. Photon spectra (target Mo or Rh) produced by a mammographic x-ray unit at 25-32 kV and 240 mAs (= 3 times of 80 mAs) and transmitted through 0.03 mm Mo or 0.025 mm Rh filter and object (0.1 mm Al to 0.8 mm Al phantoms) have been analyzed. Since detected spectra were distorted by the response of CdZnTe detector and did not present the true photon spectra, the correction was applied by the stripping procedure. The response function of detector used in this procedure has been determined by the evaluation of interactions (K-escape, coherent scattering, and Compton scattering processes) and incomplete charge collection calculated using the Monte Carlo method. We have used Kalpha1, Kalpha2, Kbeta1, Kbeta2 radiations of Cd, Zn, and Te, respectively and have used the weight function for the incomplete charge collection and have considered Compton scattering. The Monte Carlo simulations were continued by changing the important factors (mean path length of hole lambda(h), dead layer of the CZT crystal and weight factor Wq) of incomplete charge collection until the best fit response function was found out. Corrected photon spectra were compared with the mammographic x-ray spectral data of Bureau of Radiological Health (BRH) measured using a Ge detector. Attenuation curves of aluminum for 25-32 kV were calculated from the corrected photon spectra and compared with the attenuation curves measured using an ionization chamber. These results obtained using the CdZnTe detector agreed with the mammographic x-ray spectral data of BRH and attenuation curves obtained by the ionization chamber.

Cadmium↗
PubMed1999

Volatile components in stored rice [Oryza sativa (L.)] of varieties with and without lipoxygenase-3 in seeds.

Lipoxygenase (LOX) is thought to play an important role in the formation of desirable or undesirable flavor and aroma in many plant products. In rice seeds, LOX activity is localized in the bran fraction and LOX-3 is the major isozyme component. We used gas chromatography-mass spectrometry to determine whether the degree of staleness in the flavor of stored brown rice was related to the presence of LOX-3. We found that the amount of hexanal, pentanal, and pentanol in normal raw LOX-3 rice markedly increased during storage at 35 degrees C. That in LOX-3-less rice increased slightly but was a third to a fifth that of normal LOX-3 rice. In cooked rice, the amount of these components from glutinous rice exceeded that in nonglutinous rice, and that in normal LOX-3 rice exceeded that in LOX-3-less rice. These results indicate that the stale flavor production in LOX-3-less rice during storage is less than that in normal LOX-3 rice.

Aldehydes↗
PubMed1999

Transformation of fibrolamellar carcinoma to common hepatocellular carcinoma in the recurrent lesions of the rectum and the residual liver: a case report.

A 21-year-old man had undergone central bisegmentectomy of the liver due to fibrolamellar carcinoma (FLC). Twice, 24 and 30 months after the first operation, lymph node metastases were removed. We have reported this case previously and this is the second report of the same case. Forty-two months after the second operation to remove lymph node metastases, a recurrence occurred in the rectum and was excised. However, the tumor also recurred in the residual liver. The patient underwent hepatectomy for a palliative purpose but died 16 months after the last operation. Histopathologically, the primary tumor was diagnosed as pure FLC, but the lymph node metastases had foci of the common hepatocellular carcinoma (HCC) mixed with FLC. In contrast, the recurrent tumors in the rectum and the residual liver showed the histopathological features of common HCC. Thus, during repeated recurrences, histopathological features changed from pure FLC to common HCC.

Adult↗
PubMed1999

Creatinine at the evaluation of urinary 1-methyladenosine and pseudouridine excretion.

The elevation of urinary modified nucleosides levels in urine is found in patients with cancers. In the present study, we have tested 616 urine samples randomly collected from non-malignant cases. Thirty-two percent (194/616) and 11% (68/616) had elevated levels of 1-methyladenosine and pseudouridine, respectively (They are designated as false-positive cases). To elucidate the cause on non-specific elevation of the nucleosides, the correlation between creatinine excretion level and urinary nucleosides levels were determined. The result revealed that false-positive cases were frequently detected in patients with lower creatinine excretion levels. The mean creatinine levels of false-positive cases were significantly lower than those of negative cases. From these results, the false-positive of urinary 1-methyladenosine and pseudouridine might be due to the low creatinine excretion mainly caused by the renal dysfunction. Creatinine excretion in each individual should be taken into consideration in case of determining urinary modified nucleosides.

Adenosine↗
PubMed1999

[Case report of a long-term home parenteral nutrition patient].

We experienced a patient who received long-term home parenteral nutrition. A 55-year-old woman underwent left adrenalectomy in June, 1992. The histopathological diagnosis was aldosteronism. Abdominal pain and ileus appeared in July, 1993, and an adhesiotomy was conducted. Due to poor appetite and weight loss, fluid was sometimes injected peripherally. After abdominal pain in November, 1996 and April, 1997, the ileus reappeared in July, 1997. A Groshong catheter with a port was then inserted through the subclavian vein to the superior vena cava/right atrial junction. Using this catheter, home parenteral nutrition started. Some time later oral nutrition became possible, but now high calorie parenteral nutrition is continued. The only complications were pain and red skin at the port. A Groshong catheter with port is thus useful for home parenteral nutrition.

Adrenalectomy↗
PubMed1998

Surgical treatment of a solitary pancreatic metastasis from renal cell carcinoma: report of a case.

The pancreas is a rare site of metastasis from renal cell carcinoma (RCC). We present herein the case of a 47-year-old male in whom a solitary pancreatic metastasis was treated by a pylorus-preserving pancreatoduodenectomy (PpPD), 3 years after a radical nephrectomy for a RCC. The few reported cases of surgically treated pancreatic metastases from RCC are reviewed following the presentation of this case.

Carcinoma, Renal Cell↗
PubMed1998

Interleukin-10 production during and after upper abdominal surgery.

STUDY OBJECTIVE: To evaluate the influence of major abdominal surgery on the plasma levels of interleukin-10 (IL-10). DESIGN: Prospective study. SETTING: University hospital. PATIENTS: 10 ASA physical status I and II patients undergoing upper abdominal surgery. INTERVENTIONS: All patients received combined general-epidural anesthesia with isoflurane and nitrous oxide, after insertion of an epidural catheter at T8-T9 dosed with 1.5% lidocaine. MEASUREMENTS AND MAIN RESULTS: Plasma interleukin-6 (IL-6), interleukin-8 (IL-8), and IL-10 levels were determined with an enzyme-linked immunosorbent assay at preanesthesia, 0, 2, and 4 hours during surgery, and at the end of surgery, followed by sampling on the morning of postoperative days 1 (POD1) and 3 (POD3). Before anesthesia and at 0 hours of surgery, IL-10 was not detected. In all ten patients, the plasma levels of IL-10 showed significant elevations and achieved their maximal value 4 hours after the skin incision (p < 0.05 vs. baseline). The plasma IL-10 levels returned to preanesthesia levels on POD3. The plasma levels of IL-6 and IL-8 also increased in the perioperative period. The peak cytokine levels correlated (r = 0. 915, p = 0.0001 for IL-6 vs. IL-8; r = 0.82, p = 0.025 for IL-6 vs. IL-10; and r = 0.641, p = 0.06 for IL-8 vs. IL-10). The peak plasma IL-10 levels significantly correlated with the amount of intraoperative blood loss (r = 0.69, p < 0.05). CONCLUSIONS: In patients undergoing major abdominal surgery, plasma IL-10 levels were elevated during and after operation. IL-10 may modulate the inflammatory responses in the perioperative period.

Abdomen↗
PubMed1998

[A case of intracranial tuberculoma followed by MRI].

A 62-year-old woman with pulmonary tuberculosis was admitted to our hospital. She was completely neurologically free at admission and her CSF was normal. Brain MRI with Gd-DTPA enhancement demonstrated two mass lesions with ring-enhancement in the left temporal lobe and the right frontal lobe. The left temporal lesion had a bright central core with hypointense periphery on T2 weighted image. Extended hyperintense area was observed around this lesions, which represented brain edema. On T1 weighted image, the central core was demonstrated hypointense and its periphery was isointense. After starting antituberculous therapy, MRI revealed paradoxical expansion of left temporal lesion and neurological symptoms worsened temporarily, but, eventually the intracranial lesions diminished in size and disappeared, and the symptoms improved. So we diagnosed her as having intracranial tuberculoma. By long-term following up with MRI, we observed that the central core of the left temporal tuberculoma had changed gradually to hypointense on T2 weighted image and hyperintense on T1 weighted image respectively. We thought that the change of the central core on MRI represented organization of caseated necrosis.

Antitubercular Agents↗
PubMed1998

MPB64 mycobacterial antigen: a new skin-test reagent through patch method for rapid diagnosis of active tuberculosis.

SETTING: A collaborative study between the Japan BCG Laboratory, Tokyo, Japan, and the Infectious Disease Section, Philippine General Hospital, Manila, the Philippines. Tuberculosis patients from four clinics in the vicinity of Manila, Our Lady of Grace Parish, Sto. Niño de Tondo Parish, the Canossa Health and Social Center, and the Health Care Development Center, were examined. OBJECTIVE: To develop a new, simple and rapid diagnostic method for active tuberculosis. Subjects were tested for skin reaction to a special antigen, MPB64, by the patch test method instead of intradermal injection of purified protein derivative (PPD). DESIGN: Fifty-three active tuberculosis patients and 43 healthy PPD-positive controls were tested to determine whether or not the reaction to MPB64 was positive only in active tuberculosis patients. RESULTS: Fifty-two of the 53 active tuberculosis patients showed a positive reaction to MPB64, while none of the 43 PPD-positive controls did. The specificity of MPB64 to active tuberculosis was 100%, and the sensitivity was 98.1%. The efficacy of the test was 98.9%. CONCLUSION: The patch test with MPB64 is a promising method for the diagnosis of active tuberculosis, distinguishing tuberculous patients from those who are infected but have not developed the disease, and also from BCG-vaccinated individuals. This new skin test is a subject for further evaluation and it is important to compare the results with PPD Mantoux.

Animals↗