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Summary. Thrombopoietin (TPO) is an essential hematopoietic cytokine for megakaryopoiesis. In 2002, we demonstrated that pegylated-recombinant human megakaryocyte growth and development factor (PEG-rHuMGDF) increased platelet counts in patients with chronic immune thrombocytopenic purpura (ITP) in a Phase I/II clinical trial. After the cessation of clinical trials of PEG-rHuMGDF because of severe thrombocytopenia or pancytopenia due to the development of the neutralizing antibody cross-reacting with endogenous TPO, second generation non-immunogenic TPO receptor agonists have been developed. A small molecule eltrombopag and Romiplostim were approved for clinical use by FDA in 2008 to treat patients with chronic ITP who are refractory to the prior therapy. Although the efficacy of both TPO receptor agonists is convincing for the refractory ITP, further investigation is necessary to assess the potential long-term side effects and clinical applications of these therapies for other thrombocytopenic conditions. 相似文献
13.
Identification of monocyte chemoattractant protein-1 in senile plaques and reactive microglia of Alzheimer's disease 总被引:6,自引:0,他引:6
KOKO ISHIZUKA MD TAKEMI KIMURA MD RURIKO IGATA-YI MD SHOICHI KATSURAGI MD JUNICHI TAKAMATSU MD TAIHEI MIYAKAWA MD 《Psychiatry and clinical neurosciences》1997,51(3):135-138
Abstract It has been shown that human monocytes express monocyte chemoattractant protein-1 (MCP-1), an inflammatry factor, in response to non-fibrillar β-amyloid protein. Reactive microglia and inflammatory factors were reported to be present in β-amyloid deposits (senile plaques) in Alzheimer's disease, suggesting the presence of MCP-1 in senile plaques. To address this issue, we examined MCP-1-immunoreactivity in senile plaques using a mouse monoclonal anti-MCP-1 antibody. Monocyte chemoattractant protein-1 was found immunohistochemically in mature senile plaques and reactive microglia but not in immature senile plaques of brain tissues from five patients with Alzheimer's disease. These findings suggest that MCP-1-related inflammatory events induced by reactive microglia contribute to the maturation of senile plaques. 相似文献
14.
Mitsuru Okada Kazuo Yoshioka Tukasa Takemura Norihisa Akano Naobumi Aya Katsumi Murakami Sunao Maki 《Virchows Archiv : an international journal of pathology》1993,422(5):367-373
The localization of C3d, a fragment produced by C3 activation and S-protein (vitronectin), a regulatory factor of C5b-9, was studied immunohistochemically in normal human kidney and renal biopsies from patients with several types of glomerulonephritis. Immunofluorescent staining of the normal kidneys showed that C3d was present along the glomerular basement membrane (GBM), tubular basement membrane (TBM) and arterioles, and that S-protein was present in the GBM, mesangium, TBM, and arterioles. Immunoelectron microscopy of isolated basement membranes showed that C3d was localized exclusively on the epithelial side of the GBM, and that S-protein was present along both the epithelial and endothelial sides. In nephritic tissues, glomerular staining of C3d, C5b-9, and S-protein was increased when compared with that in normal tissues. S-protein, frequently co-localized with C3d and C5b-9 neoantigen, was intensely positive in the immune deposits of glomerular capillaries and the mesangial area, overlapping the background staining of GBM and mesangial matrix. S-protein and its receptor were occasionally co-localized in the glomeruli. These findings indicate that C3d and S-protein are normally present in the glomeruli. Co-staining of C3d, C5b-9 neoantigen, and S-protein within the immune deposits of nephritic kidneys suggests in situ binding of S-protein to locallyformed C5b-9 complex, or merely co-distribution of S-protein with the complex, rather than trapping of large molecular SC5b-9 complex from the circulation. 相似文献
15.
KEI-ICHIRO NAKAYAMA KIYOSHI TAKAHASHI LEONARD D. SHULTZ KAZUHISA MIYAKAWA & KIMIO TOMITA 《International journal of experimental pathology》1997,78(4):245-257
In mice homozygous for the 'viable motheaten' ( mev ) mutation, numbers of macrophage progenitor cells, particularly monocytes, were markedly increased in the bone marrow and spleen. Increased mobilization of these precursor cells to peripheral tissues and their differentiation to macrophages were evidenced by striking increases in macrophage numbers. Immunohistochemical double staining of tissue sections and flow cytometry analyses of single cell suspensions from these mice demonstrated CD5 (Ly-1)-positive macrophages in the peritoneal cavity, spleen and other tissues. Ly-1-positive macrophage precursor cells were demonstrated in the peritoneal cavity of the mev mice and developed in the omental milky spots. The development of marginal metallophilic and marginal zone macrophages was poor in the splenic white pulp and related macrophage populations were absent in the other lymphoid tissues. The numbers of epidermal Langerhans cells in the skin and T cell-associated dendritic cells in the thymic medulla, lymph nodes, and the other peripheral lymphoid tissues were decreased. However, increased numbers of dendritic cells accumulated in the lungs, liver, and kidneys. These abnormalities in development and differentiation of macrophages and dendritic cells may be ascribed to the deficiency in haematopoietic cell SHP-1 tyrosine phosphatase or may be a secondary consequence of abnormal microenvironments, (either constitutive or in response to inflammatory stimuli) in the haematopoietic and lymphopoietic organs and tissues of these mice. 相似文献
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YAMAGUCHI KEN; ABE KAORU; ADACHI ISAMU; TANAKA NOBUYOSHI; TANAKA MASAHIRO; MIYAKAWA SUMIKO; KAMEYA TORU; KIMURA TOKIHISA 《Japanese journal of clinical oncology》1977,7(2):111-118
A 48-year-old man with a small cell carcinoma of the lung presentedhyponatremia and was diagnosed as having the syndrome of inappropriateADH secretion. A plasma ADH bioassay confirmed this syndrome.During the clinical course, the patient developed a hyponatremiccrisis with a serum sodium of 108mEq/l. His hyponatremia wasrapidly corrected by infusing furosemide in conjunction withhypertonic saline. The postmortem studies demonstrated ADH bioactivityin the tumor tissues, as well as immunoreactive ACTH, ß-MSHand calcitonin. Tumor hypersecretion of ACTH appeared to bethe cause of the patient's hyperresponsiveness to exogenousACTH and of the bilateral adrenocortical hyperplasia observedat the time of autopsy. Therefore, this was a case of a multiple hormone-producing smallcell carcinoma of the lung, in which the severe clinical manifestationsof SIADH were successfully treated with furosemide and hypertonicsaline. 相似文献
18.
TANAKA MASAHIRO; ABE KAORU; OHNAMI SHUMPEI; ADACHI ISAMU; YAMAGUCHI KEN; MIYAKAWA SUMIKO 《Japanese journal of clinical oncology》1978,8(2):141-148
Patients with advanced breast cancer were treated with antiestrogen,tamoxifen, 20 mg orally, twice a day. Of the evaluable 23 patients,one achieved complete response with a duration of 16 months,and five achieved partial response lasting from two to eightmonths, indicating that the response rate was 26%. In the fiveperi-and postmenopausal patients, basal and LH-RH stimulatedplasma LH levels decreased but stayed within the postmenopausalrange in three patients during the tamoxifen therapy. Basaland LH-RH stimulated FSH levels decreased also but stayed withinthe postmenopausal range in all five patients. In a premenopausalpatient, basal and stimulated plasma LH and FSH levels did notchange significantly during the tamoxifen therapy. The plasmaTSH responses did not change significantly. In three of thesix patients, basal and TRH-stimulated prolactin levels decreasedslightly during the tamoxifen therapy. These relatively inconsistentand small changes in the pituitary hormone secretion observedduring the tamoxifen therapy suggest that the anti-tumor effectof tamoxifen was not due to alteration of the pituitary hormonesecretion. The binding of tamoxifen for the estrogen receptorwas examined in the estrogen receptor assay system. The doseresponse curve for tamoxifen was parallel to that for estradiol,indicating that tamoxifen competes with estradiol for the estrogenreceptor. The affinity constants of tamoxifen for the estrogenreceptor in eight cytosols of human breast cancer tissues were(139 ±79) X 1010M (mean±SD), indicatingthat the binding affinity of tamoxifen was about 0.7% that ofestradiol. The affinity constants for nuclear receptors weresimilar to those for cytosol receptors. These data suggest thattamoxifen is a useful drug for treatment of advanced breastcancer, and that the anti-tumor effect could be related to itsbinding to estrogen receptors in tumor tissues, and not causedby altering the secretion of pituitary hormones. 相似文献
19.
The case of a 64‐year‐old patient with pica and severe mental retardation who was admitted to our hospital for treatment of recurrent cholecystitis is reported. Abdominal ultrasound showed sludge in the gallbladder, but no stones. Abdominal CT revealed a foreign body in the duodenum resembling a suction cup of the type commonly used in kitchens and bathrooms. The object could not be removed because it was deeply embedded in the hypertrophic intestinal mucosa. A nasogastric tube was inserted for feeding, since the object impeded the passage of solid foods. The patient's fever and abdominal pain subsequently resolved, and laboratory data improved. The indwelling feeding tube prevented recurrence of cholecystitis. Since pica is common not only in patients with mental retardation but also in dementia patients, the present case may also relate to the treatment of acute abdominal conditions in dementia patients. 相似文献
20.
Shozo Hirota Shinnichi Matsumoto Satoshi Ichikawa Masaru Tomita Tukasa Koshino Masao Sako Michio Kono 《Cardiovascular and interventional radiology》1997,20(2):139-141
To prevent embolization of necrotic renal vein tumor after transcatheter embolization of a left renal cell carcinoma, we placed
a suprarenal Bird’s nest inferior vena cava filter. The patient tolerated the procedure well and had extensive tumor infarction
including the tumor thrombus on 6-month follow-up computed tomography. 相似文献