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Kazama JJ, Omori K, Takahashi N, Ito Y, Maruyama H, Narita I, Gejyo F, Iwasaki Y, Fukagawa M. Maxacalcitol therapy decreases circulating osteoprotegerin levels in dialysis patients with secondary hyperparathyroidism. Clin Nephrol 2005; 64:64-8. [PMID: 16047647 DOI: 10.5414/cnp64064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Osteoprotegerin is a natural glycoprotein which plays a critical role in osteoclast physiology. Elevated levels of circulating osteoprotegerin may account for the development of bone and mineral metabolic abnormalities in uremia. Little is known about the effects of vitamin D therapy on the circulating osteoprotegerin levels in dialysis patients. PATIENTS AND METHODS Fifty chronic dialysis patients whose plasma intact PTH levels were greater than 300 pg/ml were analyzed for the study. Following a four-week washout time during which all vitamin D administration was halted, 10 microg of maxacalcitol was intravenously injected thrice a week. RESULTS The circulating intact PTH, bone-specific alkaline phosphatase and intact osteocalcin levels were significantly lowered, while the serum calcium levels were elevated after the therapy. The osteoprotegerin levels significantly decreased after the therapy (p < 0.0001). CONCLUSION Maxacalcitol therapy reduced the circulating osteoprotegerin levels and improved secondary hyperparathyroidism. The observed effects were the opposite of those expected from previous in vitro studies. Osteoprotegerin may mediate and/or modify the effect of active vitamin D therapy in dialysis patients.
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Taniguchi H, Nakano T, Katayama Y, Harada F, Arai Y, Mori K, Hirata K, Kamiya K, Maruyama H, Sano K. Sentinel surveillance for international Shigella by a quarantine station in Japan. Epidemiol Infect 2005; 133:611-5. [PMID: 16050505 PMCID: PMC2870287 DOI: 10.1017/s0950268805003985] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The Japanese quarantine system monitors incoming passengers to detect imported pathogens at international airports. At one airport, we found that 74% of 13 315 travellers returning with diarrhoea had visited only one country before entering Japan. On the basis of our results, we hypothesized that the international distribution and potential source of bacterial strains could be inferred by analysing strains isolated from travellers returning to Japan. In order to demonstrate the potential for this system, we randomly selected five Shigella sonnei strains and examined their restriction fragment length polymorphism patterns. One set of strains appeared to be closely related, while three sets, isolated from travellers who visited different countries were possibly related. These results suggest that international distributions and potential sources of S. sonnei may be inferred by monitoring isolates from passengers arriving at a Japanese quarantine station.
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Maruyama H, Watari T, Miura T, Sakai M, Takahashi T, Koie H, Yamaya Y, Asano K, Edamura K, Sato T, Tanaka S, Hasegawa A, Tokuriki M. Plasma thrombinantithrombin complex concentrations in dogs with malignant tumours. Vet Rec 2005; 156:839-40. [PMID: 15980137 DOI: 10.1136/vr.156.26.839] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Maruyama H, Matsutani S, Saisho H, Mine Y, Kamiyama N, Hirata T, Sasamata M. Real-time blood-pool images of contrast enhanced ultrasound with Definity in the detection of tumour nodules in the liver. Br J Radiol 2005; 78:512-8. [PMID: 15900056 DOI: 10.1259/bjr/59648297] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Lower mechanical index (MI) technique with newer microbubble agents has been introduced into clinical practice as a newer ultrasound (US) imaging. However, the efficacy in detecting tumour nodules has not been proven scientifically. The aim of this study was to elucidate the efficacy of a blood-pool image of real-time contrast-enhanced US under low MI in detecting liver tumours. 15 rabbits with VX-2 tumour were used; the number of implantations was none in two rabbits, one in four, two in five and three in four. US equipment was APLIO (Toshiba) with linear probe (3.5/7.0 MHz). The number, location and size of tumour nodules were examined by non-contrast tissue harmonic imaging (NC-US) or contrast-enhanced pulse subtraction harmonic imaging (C-US) under extra-low MI (MI 0.065) with the injection of Definity (30 microl kg(-1)). The number of tumour nodules detected by both NC-US and C-US were consistent with the histopathological results in five rabbits - two with none, two with one nodule and one with two nodules. In the other 10 rabbits, C-US showed all the implanted tumours and small daughter nodules around them that were confirmed by histopathology. However, NC-US failed to demonstrate two implanted nodules and all the daughter nodules. On the basis of the histopathological results, detectability of implanted tumour was not significantly different between NC-US (24/26, 92.3%) and C-US (26/26, 100%). However C-US was superior to NC-US in delineating the nodules and in detecting small daughter nodules. The sizes of the implanted tumour nodules measured by histopathology correlated closely with those measured by C-US. Real-time blood-pool images by pulse subtraction harmonic imaging under extra-low MI with Definity will contribute to the improvement of the ultrasound delineation and detection of liver tumours.
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Maruyama H, Higuchi M, Higuchi N, Kameda S, Saito M, Sugawa M, Matsuzaki J, Neichi T, Yokoyama S, Miyazaki Y, Miyazaki J, Gejyo F. Post-secretion neutralization of transgene-derived effect: soluble erythropoietin receptor/IgG1Fc expressed in liver neutralizes erythropoietin produced in muscle. J Gene Med 2004; 6:228-37. [PMID: 14978776 DOI: 10.1002/jgm.485] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The regulation of transgene expression is a key issue for the development of safe gene therapy. Various strategies have been used to regulate protein production at the levels of transgene expression, transcription, translation, and secretion. Neutralization following secretion is another important backup system to prevent super-therapeutic levels of a protein from being expressed by gene transfer. METHODS We tested whether the soluble human erythropoietin receptor (EpoR)/IgG(1)Fc could neutralize the rat Epo at the post-secretory level and suppress erythrocytosis. RESULTS To assess whether soluble human EpoR could bind rat Epo in vitro, we used the Epo-dependent human leukemic cell line, AS-E2. EpoR/IgG(1)Fc significantly inhibited the growth of AS-E2 cells in Epo-containing medium. To test this neutralization effect of EpoR/IgG(1)Fc in vivo, we first transferred pCAGGS-Epo into rat muscle by in vivo electroporation, confirmed erythropoiesis for 3 weeks, and then delivered EpoR/IgG(1)Fc by liver-targeted gene transfer via tail-vein injection with hydrodynamics-based transfection. Reticulocyte counts and hematocrit levels in rats that received pCAGGS-EpoR/IgG(1)Fc injections were significantly lower than in rats that received pCAGGS-EpoR, pCAGGS-IgG(1)Fc, or no injection. CONCLUSIONS These results demonstrate that liver-targeted pCAGGS-EpoR/IgG(1)Fc transfer by tail-vein injection with hydrodynamics-based transfection is useful for neutralizing Epo delivered by in vivo electroporation. This backup strategy at the level of post-secretion could facilitate the clinical application of gene therapy in the future.
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Tai RZ, Namikawa K, Sawada A, Kishimoto M, Tanaka M, Lu P, Nagashima K, Maruyama H, Ando M. Picosecond view of microscopic-scale polarization clusters in paraelectric BaTiO3. PHYSICAL REVIEW LETTERS 2004; 93:087601. [PMID: 15447225 DOI: 10.1103/physrevlett.93.087601] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2003] [Indexed: 05/24/2023]
Abstract
The polarization clusters existing in both the ferroelectric and the paraelectric phase of BaTiO3 are directly observed and characterized for the first time by a picosecond soft x-ray laser speckle technique. These dynamic clusters appear continuously across the Curie temperature T(c). The clusters' distance increases approximately linearly with temperature, while their mean size does not change significantly. The polarization exhibits a maximum at a temperature about 5 degrees C above T(c). The clusters' short-range correlation strength diverges as (T-T(c))(-0.41+/-0.02) as temperature decreases toward T(c).
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Kameda S, Maruyama H, Higuchi N, Iino N, Nakamura G, Miyazaki J, Gejyo F. Kidney-targeted naked DNA transfer by retrograde injection into the renal vein in mice. Biochem Biophys Res Commun 2004; 314:390-5. [PMID: 14733917 DOI: 10.1016/j.bbrc.2003.12.107] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We recently developed a novel kidney-targeted gene transfer technique in rats, using the retrograde renal vein injection of naked plasmid DNA. Many animal disease models are created in mice by transgenic or knockout technologies. However, it is much harder to perform renal vein injection in mice than in rats because they have a thin and short vein. Here we transferred the mouse interleukin (IL)-10 gene into mice by retrograde renal vein injection, using an IL-10 and immunoglobulin fusion protein (IL-10/Fc) (96-kDa) expression plasmid, pCAGGS-IL10/Fc. We observed a dose-response relationship between serum IL-10 levels and the amount of injected DNA. The serum IL-10 levels peaked at day 1 and then were sustained for at least 2 weeks. These results demonstrate that the kidney-targeted naked plasmid DNA transfer of mice by retrograde renal vein injection can be achieved, and the kidney serves as a depot organ for the production of large proteins.
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Miyashita M, Tajiri T, Sasajima K, Makino H, Maruyama H, Nomura T, Futami R, Hagiwara N, Tsuchiya Y, Yamashita K. Response to preoperative chemotherapy affects prognosis in esophageal cancer. Dis Esophagus 2003; 16:99-101. [PMID: 12823206 DOI: 10.1046/j.1442-2050.2003.00301.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The effect of preoperative chemotherapy on prognosis is still controversial. We have investigated the relationship between responses to preoperative chemotherapy and prognosis after curative operations in patients with esophageal squamous cell carcinoma. Thirty-nine patients received preoperative chemotherapy with continuous infusion of 500 mg/m2 of 5-fluorouracil (5-FU) and intravenous injection of 20 mg/m2 of leucovorin every 12 hours for 5 days. On the 5th day alone, 70 mg/m2 of cisplatin was also infused. The effect was evaluated approximately 14 days after the end of one course of chemotherapy. The rates of responders and non-responders were 64.1% and 35.9%, respectively. After an interval of 21-28 days, transthoracic esophagectomy was performed. Significant histological effect by chemotherapy was found in responders compared to non-responders (P < 0.05). Responders had a significantly better prognosis than non-responders by Log-rank test (P < 0.01). This suggests that preoperative chemotherapy may contribute to better prognosis when the tumor is sensitive to chemotherapy.
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Kameda S, Maruyama H, Higuchi N, Nakamura G, Iino N, Nishikawa Y, Miyazaki J, Gejyo F. Hydrodynamics-based transfer of PCR-amplified DNA fragments into rat liver. Biochem Biophys Res Commun 2003; 309:929-36. [PMID: 13679063 DOI: 10.1016/j.bbrc.2003.08.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A high level of plasmid DNA expression in rat liver can be achieved by the rapid injection of a large volume of a naked DNA solution into the tail vein, called the 'hydrodynamics-based procedure.' The preparation of PCR-amplified DNA fragments is easier than that of naked DNA. In this paper we evaluated the effects of expressing the erythropoietin (Epo) gene in the rat liver by injecting fCAGGS-Epo, an Epo-expressing PCR-amplified DNA fragment, via the tail vein. After injection of 5 pmol fCAGGS-Epo (10 microg) or pCAGGS-Epo (18.4 microg), plasmid DNA, the serum Epo levels peaked at week 1, then persisted for at least 12 weeks. Transgene-derived Epo secretion resulted in significant erythropoiesis. These results demonstrated that transfer of PCR-amplified DNA fragments into the rat liver via rapid tail vein injection can be achieved. This method may provide a useful means for studying the physiologic function of a putative gene.
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Kazama JJ, Suzuki K, Yokoseki A, Oyanagi A, Goto S, Shimada H, Maruyama H, Narita I, Gejyo F. Development of hungry bone syndrome after rapid lowering of PTH with intravenous maxacalcitol therapy in a patient with non-uremic secondary hyperparathyroidism. Clin Nephrol 2003; 60:369-71. [PMID: 14640244 DOI: 10.5414/cnp60369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A 41 year-old woman complained of general bone pain and polyuria. She did not have Albright hereditary osteodystrophy. Laboratory examination revealed hypokalemia, hypocalcemia, and an elevation of serum intact PTH concentration. The patient was polyuric and relatively hypercalciuric, though her glomerular filtration rate (GFR) was normal. Neither urinary Pi nor cAMP excretion was remarkably promoted by an exogenous PTH load. An iliac bone biopsy revealed osteopenia, active osteoclastic bone resorption, fibrous transformation in bone marrow tissue, and severely disturbed calcification. Although the oral administration of alfacalcidol showed no effects, 3 weeks of intermittent intravenous injection of maxacalcitol therapy decreased the serum intact PTH concentration from 597 pg/ml to 40 pg/ml, and the bone pain was greatly relieved. However, plasma Ca concentration also decreased and symptoms of tetany appeared. Pseudohypoparathyroidism type Ib was the most likely diagnosis in this patient. In conclusion, maxacalcitol therapy satisfactorily suppressed parathyroid function in a patient with secondary hyperparathyroidism without uremia. Appropriate Ca supplementation was required to perform it safely.
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Terauchi M, Yanagawa T, Ishikawa N, Ito K, Fukazawa T, Maruyama H, Saruta T. Interactions of HLA-DRB4 and CTLA-4 genes influence thyroid function in Hashimoto's thyroiditis in Japanese population. J Endocrinol Invest 2003; 26:1208-12. [PMID: 15055474 DOI: 10.1007/bf03349159] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Hashimoto's thyroiditis (HT) is an autoimmune disease of the thyroid gland, and like many other autoimmune diseases, it is associated with the HLA and CTLA-4 gene. We have examined the distribution of the HLA DRB4*0101 allele and a CTLA-4 exon 1 A/G polymorphism in Japanese HT patients and controls and investigated possible interactions of these genes with thyroid function. Seventy Japanese HT patients and 105 controls were included in this study. HT was diagnosed on the basis of positivity for thyroid peroxidase (TPO) autoantibodies and the presence of a palpable diffuse goiter. Genotyping was performed by polymerase chain reaction (PCR)-based methods. CTLA-4-GG or -AG was more prevalent in the patients, and the odds ratio for the G allele was 4.95. The frequency of DRB4*0101-positive individuals was significantly higher in HT (odds ratio=2.17). The TSH values of HT patients at the time of diagnosis were compared to CTLA-4 genotype and HLA-DRB4*0101 positivity. They were slightly higher in the CTLA-4-AG group than in the -GG group and significantly higher in the HLA-DRB4*0101-positive group than in the -negative group (p<0.01). When the TSH values were compared in 4 groups based on positivity or negativity for HLA-DRB4*0101 and CTLA-4 GG or AG, they were found to be significantly higher in the CTLA-4-AG and HLA-DRB4*0101-positive group than in the 3 other groups (F=5.75, 3 degrees of freedom, p<0.01). These findings suggest that the interaction between the HLA-DRB4 and CTLA-4 genes determines the thyroid function of TPO-positive goitrous Japanese HT patients.
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87
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Ito T, Tokunaga K, Maruyama H, Kawashima H, Kitahara H, Horikoshi T, Ogose A, Hotta Y, Kuwano R, Katagiri H, Endo N. Coxsackievirus and adenovirus receptor (CAR)-positive immature osteoblasts as targets of adenovirus-mediated gene transfer for fracture healing. Gene Ther 2003; 10:1623-8. [PMID: 12907955 DOI: 10.1038/sj.gt.3302060] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adenovirus vectors are expected to be a powerful tool for gene therapy to treat severe fractures. Adenovirus invades cells through binding to the coxsackievirus and adenovirus receptor (CAR) on the cell membrane. CAR expression is low in normal adult animals, but it is induced on regenerating cells in some experimental models. We made a rib fracture model in mice and evaluated the histological changes and CAR mRNA expression by RT-PCR 1, 5, 10, 14, and 21 days after the fracture. CAR mRNA was expressed exclusively in the fractured ribs at each time point, but not in the normal ribs. We detected the CAR protein immunohistochemically in fibroblast-like cells in the fracture callus on days 10 and 14 after fracture. In situ hybridization showed that these fibroblast-like cells expressed mRNA of type I collagen and osteopontin, but not osteocalcin, defining the cells as immature osteoblasts. We then transferred small doses (10(4)-10(8) PFU) of lacZ-expressing adenovirus vector into immature osteoblasts on day 14. beta-galactosidase was detected only on the immature osteoblasts at every dose. Immature osteoblasts play an important role in the matrix replacement step in fracture healing. CAR-mediated gene transfer into immature osteoblasts can be reasonable for adenovirus-mediated treatment of fracture healing.
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Higuchi N, Maruyama H, Kuroda T, Kameda S, Iino N, Kawachi H, Nishikawa Y, Hanawa H, Tahara H, Miyazaki J, Gejyo F. Hydrodynamics-based delivery of the viral interleukin-10 gene suppresses experimental crescentic glomerulonephritis in Wistar-Kyoto rats. Gene Ther 2003; 10:1297-310. [PMID: 12883526 DOI: 10.1038/sj.gt.3301988] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Gene therapy is expected to revolutionize the treatment of kidney diseases. Viral interleukin (vIL)-10 has a variety of immunomodulatory properties. We examined the applicability of vIL-10 gene transfer to the treatment of rats with crescentic glomerulonephritis, a T helper 1 (Th 1) predominant disease. To produce the disease, Wistar-Kyoto rats were injected with a rabbit polyclonal anti-rat glomerular basement membrane antibody. After 3 h, a large volume of plasmid DNA expressing vIL-10 (pCAGGS-vIL-10) solution was rapidly injected into the tail vein. pCAGGS solution was similarly injected into control rats (pCAGGS rats). We confirmed the presence of vector-derived vIL-10 mainly in the liver and observed high serum vIL-10 levels in pCAGGS-vIL-10-injected rats. Compared with the pCAGGS rats, the pCAGGS-vIL-10 rats showed significant therapeutic effects: reduced frequency of crescent formation, decrease in the number of total cells, macrophages, and CD4+ T cells in the glomeruli, decrease in urine protein, and attenuation of kidney dysfunction. Using quantitative real-time polymerase chain reaction, we also observed that this model was Th1-predominant in the glomeruli and that the ratio of the transcripts of CD4, interferon-gamma, tumor necrosis factor-alpha, and monocyte chemotactic protein-1 to the transcripts of glucose-6-phosphate dehydrogenase in the glomeruli were all significantly lower in the pCAGGS-vIL-10 rats than in the pCAGGS rats. These results demonstrate that pCAGGS-vIL-10 gene transfer by hydrodynamics-based transfection suppresses crescentic glomerulonephritis.
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Miyashita M, Tajiri T, Maruyama H, Makino H, Nomura T, Sasajima K, Yamashita K. Endoscopic mucosal resection scissors for the treatment of early gastric cancer. Endoscopy 2003; 35:611-2. [PMID: 12822098 DOI: 10.1055/s-2003-40238] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Endoscopic mucosal resection (EMR) is currently a common treatment for superficial gastrointestinal tumors. We have developed new EMR scissors for superficial lesions in the esophagus and stomach. These scissors have stainless steel blades with an electrocoagulation device for hemostasis. We report a case in which superficial gastric cancer was treated by means of the EMR scissors. The lesion was removed using the scissors and no major complication was encountered. EMR scissors can be used for endoscopic resection of superficial lesions of the esophagus and stomach.
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Makino H, Tajiri T, Onda M, Sasajima K, Miyashita M, Nomura T, Maruyama H, Nagasawa S, Tsuchiya Y, Hagiwara N, Yamashita K, Takubo K. Effectiveness of preoperative chemotherapy using carboplatin (CBDCA) and surgery against an esophageal small cell carcinoma. Dis Esophagus 2003; 15:237-41. [PMID: 12444997 DOI: 10.1046/j.1442-2050.2002.00244.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A 63-year-old man presented to our hospital with persistent dysphagia. Radiologic and endoscopic examination disclosed a 2.0-cm exophytic tumor in the middle third of the esophagus. An endscopically obtained biopsy specimen was found to represent undifferentiated small cell carcinoma. Computed tomography of the chest, abdomen, and cervical region was performed, as were gallium and bone scintigraphy. Metastasis to an adjacent lymph node was detected, without metastasis to distant organs. After neoadjuvant chemotherapy with carboplatin (CBDCA) (400 mg/m2) and etoposide (VP-16) (100 mg/m2), endoscopy and barium-swallow esophagography showed regression. Thoracic esophagectomy then was performed with mediastinal, abdominal and cervical lymph node dissection. The resected tumor was polypoid, measuring 0.5 x 0.5 cm. The lesion consisted mainly of small anaplastic cells, but included a small focus of squamous cell carcinoma. The patient has survived for more than 7 months with no further treatment and no evidence of recurrent disease.
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Tsuchiya Y, Onda M, Sasajima K, Yamashita K, Nomura T, Makino H, Maruyama H, Hagiwara N, Takubo K, Miyashita M. Effects of preoperative chemotherapy on metastatic lymph nodes in esophageal squamous cell carcinoma. Dis Esophagus 2003; 15:226-31. [PMID: 12444995 DOI: 10.1046/j.1442-2050.2002.00260.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The aim of this study was to evaluate the effect of preoperative chemotherapy on metastatic lymph nodes and on the outcome of patients who underwent esophagectomy for advanced squamous cell carcinoma of the esophagus. Fifty-nine patients with potentially resectable squamous cell carcinoma of the esophagus were studied. Twenty patients (group A) were treated by preoperative chemotherapy with cisplatin, 5-fluorouracil, and leucovorin, followed by surgery. Thirty-nine patients underwent surgery alone (group B). A total of 2591 resected lymph nodes were histologically evaluated for metastasis and the effect of chemotherapy. The metastasis rate in the resected lymph nodes, the number of metastatic lymph nodes, and outcome of the patients were statistically analyzed between groups. In group A, the clinical and pathological response rates were 75% and 75% respectively. The metastasis rate in the resected lymph nodes was significantly higher in group B (P < 0.01). The mean number of metastatic lymph nodes was significantly lower in group A (P < 0.05). Furthermore, the mean number of metastatic lymph nodes was significantly lower in the chemotherapy responders than in non-responders. The survival rate in group A was better than in group B (P = 0.07). Preoperative chemotherapy reduced the number of metastatic lymph nodes and may contribute to improving the outcome of the patients who have undergone esophagectomy for squamous cell carcinoma of the esophagus.
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Kazama JJ, Takahashi N, Ito Y, Watanabe Y, Iino N, Iguchi S, Oyanagi A, Obayashi H, Ito S, Maruyama H, Narita I, Yamamoto S, Sato Y, Tsuchiya A, Ichida T, Gejyo F. Successful perioperative blood purification therapy in patients with maintenance hemodialysis therapy who underwent living donor liver transplantation. Clin Nephrol 2003; 59:229-33. [PMID: 12653270 DOI: 10.5414/cnp59229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Living donor liver transplantation (LDLT) is a treatment for end-stage liver failure, and was developed to overcome the distinct insufficiency of cadaveric donors. Case 1 is a 56-year-old man who had undergone maintenance hemodialysis therapy for 4 years. An LDLT was performed for the treatment of advanced liver cirrhosis and hepatocellular carcinoma. Continuous hemodiafiltration (CHDF) was performed from the 2nd to 5th days after the operation. Case 2 is a 55-year-old man with primary amyloidosis and chronic renal failure. An LDLT was performed for the treatment of severe abdominal distention caused by a large liver volume. Although CHDF was started at the 3rd day after the operation, it was discontinued within 24 hours because of an increased urinary volume. CHDF was required again from the 6th-8th days, after which the blood purification mode was switched to regular intermittent hemodialysis. Meanwhile, no major problems occurred in either case. In conclusion, CHDF was required for about 5 days from the 2nd day after the operation. The application of careful and aggressive blood purification therapy during the perioperative period is a key to successful LDLT in dialysis patients.
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Maruyama H, El-Malky M, Kumagai T, Ohta N. Secreted adhesion molecules of Strongyloides venezuelensis are produced by oesophageal glands and are components of the wall of tunnels constructed by adult worms in the host intestinal mucosa. Parasitology 2003; 126:165-71. [PMID: 12636354 DOI: 10.1017/s0031182002002718] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The parasitic female of Strongyloides venezuelensis keeps invading the epithelial layer of the host intestinal mucosa. Upon invasion, it adheres to the surface of the intestinal epithelial cells with adhesion molecules secreted from the mouth. It has been demonstrated that S. venezuelensis are expelled from the intestine because mucosal mast cells inhibit the attachment of adult worms to the mucosal surface. In the present study, we generated specific antibodies against secreted adhesion molecules to investigate their function in vivo, because these molecules have been demonstrated only in vitro in spite of the importance in the infection processes. A mouse monoclonal antibody specific to S. venezuelensis adhesion molecules inhibited the attachment of adult worms to plastic dishes and the binding of adhesion molecules to rat intestinal epithelial cells. Immunohistochemical study revealed that adhesion molecules were produced by oesophageal glands and were continuously secreted in vivo to line the wall of the tunnels formed by adult worms in the intestinal mucosa. Our findings indicate that adhesion molecules play essential roles in the infection processes of S. venezuelensis in the host intestine.
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Yokoyama Y, Sakamoto A, Umemoto M, Futagami M, Sakamoto T, Maruyama H, Sato S, Mizunuma H. A case of adenocarcinoma of the endometrial type mixed with a clear cell component that metastasized to the vagina. EUR J GYNAECOL ONCOL 2003; 24:435-7. [PMID: 14584665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
We present a patient with adenocarcinoma of the endometrial type mixed with a clear cell component (AMC) that metastasized to the vagina and one of the pelvic lymph nodes. She underwent a radical hysterectomy and pelvic and paraaortic lymphadenectomy, and then received postoperative adjuvant chemotherapy. Histologic features of the endometrial tumor included clear cell adenocarcinoma with an approximate 10% extent to endometrioid adenocarcinoma. On the other hand, histologic examination on the vaginal tumor predominatly showed clear cell adenocarcinoma and also revealed endometrioid adenocarcinoma to a very small extent, suggesting metastasis to the vagina from AMC. On immunohistochemical examination, expression of vascular endothelial growth factor (VEGF)-A, VEGF-C and VEGF-D was apparently stronger in the component of clear cell adenocarcinoma than in that of endometrioid adenocarcinoma. She has been a disease-free survivor for 26 months. Interestingly, locations of endometrial and vaginal lesions were consistent with the sites of an intrauterine device and ring pessary insertion, respectively.
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Tai RZ, Namikawa K, Kishimoto M, Tanaka M, Sukegawa K, Hasegawa N, Kawachi T, Kado M, Lu P, Nagashima K, Daido H, Maruyama H, Sawada A, Ando M, Kato Y. Picosecond snapshot of the speckles from ferroelectric BaTiO3 by means of x-ray lasers. PHYSICAL REVIEW LETTERS 2002; 89:257602. [PMID: 12484921 DOI: 10.1103/physrevlett.89.257602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2002] [Indexed: 05/24/2023]
Abstract
A picosecond x-ray laser speckle has been conducted to study the dynamics of a disordered surface domain structure (BaTiO3 with 90 degrees c/a domains) as a function of temperature for the first time. The transient surface structures induced by ferroelectric domains decrease as temperature increases towards the Curie temperature T(c) and completely disappear above T(c). The dramatic change of the spatial configuration of the c/a domains was observed to occur from a temperature 2 degrees C below T(c), near which the average correlated domain size at equilibrium decreases as (T(c)-T)(0.37+/-0.02).
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96
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Sasaki S, Shimizu N, Hanashima T, Yamawaki K, Udagawa H, Kawamura N, Suzuki M, Maruyama H, Matsumoto Y, Koinuma H. X-ray magnetic circular dichroism for transparent cobalt-doped anatase thin film. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302098963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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97
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Maruyama H, Higuchi N, Nishikawa Y, Kameda S, Iino N, Kazama JJ, Takahashi N, Sugawa M, Hanawa H, Tada N, Miyazaki J, Gejyo F. High-level expression of naked DNA delivered to rat liver via tail vein injection. J Gene Med 2002; 4:333-41. [PMID: 12112650 DOI: 10.1002/jgm.281] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND High levels of foreign gene expression in mouse hepatocytes can be achieved by rapid tail vein injection of a large volume of a naked DNA solution, the 'hydrodynamics-based procedure'. Rats are more tolerant of the frequent phlebotomies required for monitoring blood parameters than mice, and thus are better for some biomedical research. METHODS We tested this technique for the delivery of a therapeutic protein in normal rats, using a rat erythropoietin (Epo) expression plasmid vector, pCAGGS-Epo. RESULTS We obtained maximal Epo expression when the DNA solution was injected in a volume of 25 ml (approximately 100 ml/kg body weight) within 15 s. We observed a dose-response relationship between serum Epo levels and the amount of injected DNA up to 800 microg. Using quantitative real-time PCR, the vector-derived Epo mRNA expression was mainly detected in the liver. When a lacZ expression plasmid was injected similarly, beta-galactosidase was exclusively detected in the liver, mainly in hepatocytes. Toxicity attributable to the technique was mild and transient, as assessed by histochemical analysis. Epo gene expression and erythropoiesis occurred with Epo gene transfer in a dose-dependent manner, and persisted for at least 12 weeks, the last time point examined. Repeated administration of the plasmid DNA also effectively led to erythropoiesis. CONCLUSIONS These results demonstrate that gene transfer into the liver via rapid tail vein injection can easily be achieved in the rat, which is more than 10 times larger than the mouse, and has significant value for gene function analysis in rats.
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98
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Hashimoto H, Maruyama H, Fujimoto K, Sakakura T, Seishu S, Okuda N. Hematologic findings associated with thrombocytopenia during the acute phase of exanthem subitum confirmed by primary human herpesvirus-6 infection. J Pediatr Hematol Oncol 2002; 24:211-4. [PMID: 11990308 DOI: 10.1097/00043426-200203000-00010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To elucidate the mechanism underlying thrombocytopenia during the acute phase of exanthem subitum (ES), the associated hematological findings were investigated. PATIENTS AND METHODS Five infants with thrombocytopenia during the acute phase of ES serologically confirmed by primary human herpesvirus-6 (HHV-6) were examined and followed-up. RESULTS Thrombocytopenia was accompanied by neutropenia, leukopenia, and decreased reticulocyte fraction during the acute phase. These changes were self-limiting, and the sequential changes of platelet, neutrophil count, and reticulocyte fraction were closely linked. Slight but significant decreases in hemoglobin in the convalescent phase and mild increases in atypical lymphocytes after subsidence of the fever were observed. Hemophagocytosis and increase in atypical lymphocytes in the bone marrow suggested that bone marrow cells were influenced by primary HHV-6 infection. Platelet-associated immunoglobulin G and indirect antiplatelet antibody were negative. Plasma levels of fibrinogen and D-dimer of fibrinogen degradation products were within normal ranges. CONCLUSIONS Thrombocytopenia is a complication of ES, and this may result from bone marrow suppression rather than from immune-mediated peripheral consumption seen in acute idiopathic thrombocytopenic purpura or from disseminated intravascular coagulation.
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Maruyama H, Ogawa M, Nishio T, Kobayashi K, Saheki T, Sunohara N. Citrullinemia type II in a 64-year-old man with fluctuating serum citrulline levels: mutations in the SLC25A13 gene. J Neurol Sci 2001; 193:63. [PMID: 11718753 DOI: 10.1016/s0022-510x(01)00646-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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100
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Maruyama H, Ataka K, Higuchi N, Sakamoto F, Gejyo F, Miyazaki J. Skin-targeted gene transfer using in vivo electroporation. Gene Ther 2001; 8:1808-12. [PMID: 11803401 DOI: 10.1038/sj.gt.3301604] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2001] [Accepted: 08/31/2001] [Indexed: 11/09/2022]
Abstract
The skin is an important target for gene transfer because of its easy accessibility. Using plasmid DNA expressing rat erythropoietin (pCAGGS-Epo) as the vector, we previously demonstrated long-term Epo delivery in rats by muscle-targeted gene transfer using in vivo electroporation. Here we examined whether this electroporation approach could be applied to gene delivery in rat skin. To optimize gene transfer, we tested the efficiency of skin-targeted Epo gene transfer with three types of electrodes at three different electrode voltages. Each rat was injected intradermally with a total of 800 microg of pCAGGS-Epo, in the abdominal area. Plate-and-fork-type electrodes were effective for Epo delivery by skin-targeted gene transfer at low voltages (12 approximately 24 V). The vector-derived Epo mRNA was expressed only at the DNA injection site. The Epo gene was expressed in a dose-dependent manner, the expression persisted for 7 weeks, and hematocrit levels were increased for 11 weeks. Skin injection with pCAGGS-lacZ showed lacZ gene expression in the epidermis on day 1 after injection and in the subcutaneous muscle layer on day 7. Slight skin damage due to the gene transfer procedure was evident on day 1, but absent by day 7. These results demonstrate that skin-targeted pCAGGS-Epo transfer by in vivo electroporation at low voltage is a useful procedure for the short-term delivery of Epo.
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