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1.
Kidney Int ; 70(3): 486-95, 2006 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16788697

RESUMO

Direct maxacalcitol (OCT) injection into a parathyroid gland (PTG) ameliorates several important etiologic factors of resistance to medical treatments for secondary hyperparathyroidism (s-HPT): the upregulations of vitamin D receptor (VDR) and Ca-sensing receptor (CaSR) in PTGs and the regression of PTG hyperplasia by the induction of apoptosis. In this study, we evaluated the bone histomorphology on the basis of maintaining these effects in advanced s-HPT. Five/six nephrectomized Sprague-Dawley rats were fed a high-phosphorus and low-calcium diet for 8 weeks. These rats were divided into four treatment groups: (1) basic uremic (at the baseline), (2) direct OCT single injection into PTGs (DI-OCT) followed by OCT intravenous administration for 4 weeks (IV-OCT), (3) direct vehicle injection and IV-OCT, and (4) no treatment for an additional 4 weeks. The effects of these treatments on serum intact-parathyroid hormone (PTH) level, PTG weight, VDR and CaSR expression levels in PTGs, and bone histomorphometric parameters were investigated. In the DI-OCT+IV-OCT group, the significant decrease in serum intact-PTH level was maintained by the following IV-OCT. A significant decrease in PTG weight and the upregulations of VDR and CaSR expression levels in PTGs were also observed. Bone histomorphometric analysis showed significant improvements in osteitis fibrosa in both cancellous and cortical bones. However, these findings were not observed in the other groups. These results suggest that osteitis fibrosa caused by advanced s-HPT can be successfully reversed by a control of PTH at an appropriate level through the improvement of PTG hyperplasia as induced by DI-OCT+IV-OCT.


Assuntos
Antineoplásicos/farmacologia , Calcitriol/análogos & derivados , Distúrbio Mineral e Ósseo na Doença Renal Crônica/tratamento farmacológico , Hiperparatireoidismo Secundário/tratamento farmacológico , Animais , Osso e Ossos/metabolismo , Osso e Ossos/patologia , Calcitriol/farmacologia , Distúrbio Mineral e Ósseo na Doença Renal Crônica/etiologia , Distúrbio Mineral e Ósseo na Doença Renal Crônica/patologia , Hiperparatireoidismo Secundário/complicações , Hiperparatireoidismo Secundário/patologia , Hiperplasia , Imuno-Histoquímica , Injeções Intralesionais , Falência Renal Crônica/complicações , Masculino , Tamanho do Órgão , Glândulas Paratireoides/patologia , Hormônio Paratireóideo/genética , Periósteo/metabolismo , Periósteo/patologia , Antígeno Nuclear de Célula em Proliferação/metabolismo , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Receptores de Calcitriol/genética , Receptores de Calcitriol/metabolismo , Receptores de Detecção de Cálcio/genética , Receptores de Detecção de Cálcio/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa
2.
Int J Gynaecol Obstet ; 85(2): 145-50, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-15099776

RESUMO

OBJECTIVES: The aim of this study was to analyze the relationship between the period of abnormal uterine bleeding (AUB) and the prognosis of endometrial cancer. METHODS: We reviewed 304 endometrial cancer patients who were diagnosed and treated between 1985 and 1998 in our hospital, and whose history of AUB and clinical parameters were clearly available from their charts. Pathological data and overall survival were compared between groups having different periods of AUB. RESULTS: Duration of AUB had no impact on the prognosis of endometrial cancer. Patients diagnosed with endometrial cancer without AUB showed a significantly better 5-year overall survival rate than the patients diagnosed after the onset of AUB. The distribution of clinical stages and histological grades did not differ depending on AUB status. CONCLUSIONS: The prognosis of endometrial cancer was determined by the histopathological character of the tumor. However, the diagnosis and treatment of endometrial cancer with some suspicious signs other than AUB might improve the prognosis.


Assuntos
Adenocarcinoma/mortalidade , Neoplasias do Endométrio/mortalidade , Hemorragia Uterina/etiologia , Adenocarcinoma/complicações , Adenocarcinoma/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias do Endométrio/complicações , Neoplasias do Endométrio/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida , Fatores de Tempo
3.
Gan To Kagaku Ryoho ; 28(7): 979-86, 2001 Jul.
Artigo em Japonês | MEDLINE | ID: mdl-11478148

RESUMO

A clinical investigation of adverse events was conducted to confirm the safety of concurrent chemotherapy using nedaplatin (cisplatin derivative) and radiotherapy in the high-risk carcinoma of the uterine cervix. Seven patients who were treated with radical radiotherapy and 5 patients who were treated with adjunctive radiotherapy after radical hysterectomy and pelvic lymphadenectomy were eligible for the study. Nedaplatin was given intravenously at 70 mg/m2 on day 1 and day 29, and a total of 24 courses of nedaplatin administration were observed. None of the planned radiotherapy was postponed or discontinued due to side effects. Major adverse effects observed were gastrointestinal effects such as anorexia (66.7%), nausea and vomiting (33.3%) and diarrhea (66.7%). Grade 3 (in the 2nd course) and Grade 4 (in the 1st course) diarrhea was observed in one patient, which was easily relieved by antidiarrheal. Hematologic side effects were also major, including leukopenia (62.5%), neutropenia (75.0%), anemia (75.0%), and thrombocytopenia (33.3%). Hematologic effects were generally moderate; no Grade 4 (severe) effects were observed. Although these hematologic effects were lasting longer compared with radiation therapy alone, there were no significant differences in the seriousness of these side effects. Concurrent chemoradiation therapy with nedaplatin 70 mg/m2 every 4 weeks was safe and adverse effects were self-limited or resolved with medical management. Dose escalation in the phase III clinical study may be considered.


Assuntos
Antineoplásicos/uso terapêutico , Compostos Organoplatínicos/uso terapêutico , Neoplasias do Colo do Útero/tratamento farmacológico , Neoplasias do Colo do Útero/radioterapia , Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/radioterapia , Adulto , Idoso , Anorexia/induzido quimicamente , Antineoplásicos/efeitos adversos , Carcinoma Adenoescamoso/tratamento farmacológico , Carcinoma Adenoescamoso/radioterapia , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/radioterapia , Diarreia/induzido quimicamente , Esquema de Medicação , Feminino , Humanos , Histerectomia , Infusões Intravenosas , Pessoa de Meia-Idade , Náusea/induzido quimicamente , Terapia Neoadjuvante , Compostos Organoplatínicos/efeitos adversos , Radioterapia Adjuvante , Neoplasias do Colo do Útero/cirurgia , Vômito Precoce/etiologia
4.
J Reprod Immunol ; 47(2): 185-96, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10924750

RESUMO

Lymphohematopoietic cytokines play a significant role in many biological mechanisms including a number of reproductive processes such as ovulation, implantation, placentation, cervical dilation and parturition. Recent experiments have suggested that cytokines play a crucial role in the mechanisms of preterm labor and delivery, which are the leading causes of perinatal morbidity and mortality. Growing evidence suggests that infection is deeply concerned in the pathogenesis of preterm labor and delivery. Chorioamnionitis, a subset of intrauterine infection, has been identified in 20-33% of women with preterm delivery, and the inflammatory and related cytokines, interleukin-1 (IL-1), tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6) and interleukin-8 (IL-8), showed substantial increases in the amniotic fluid at women with intrauterine infection. Although the precise mechanism for chorioamnionitis-driven preterm labor mediated via cytokines is still unknown, both IL-1 and TNF-alpha along with IL-6 enhance prostaglandin production by human amnion cells, chorionic cells and decidual cells. Analysis of the regulatory sequences in the 5' upstream regions of receptor gene for human oxytocin, a potent uterotonic agent, suggests a close relationship between preterm labor and inflammatory cytokines through induction at the oxytocin receptor. Prompt identification of the patients with intra-amniotic infection may be useful in clinical practice. At present, the measurement of IL-8 in maternal serum or the measurement of IL-6 in cervical secretion may be helpful as a non-invasive screening for chorioamnionitis.


Assuntos
Corioamnionite/imunologia , Citocinas/biossíntese , Trabalho de Parto Prematuro/etiologia , Complicações Infecciosas na Gravidez/imunologia , Colo do Útero/imunologia , Feminino , Humanos , Interleucina-6/análise , Interleucina-8/sangue , Modelos Imunológicos , Trabalho de Parto Prematuro/prevenção & controle , Gravidez , Contração Uterina
5.
Auris Nasus Larynx ; 27(3): 247-52, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10808113

RESUMO

OBJECTIVE: Accumulation of eosinophils (Eo) is one of the most characteristic feature of nasal polyps. However, the question remains why eosinophils accumulate into the nasal polyp tissue. RANTES (regulated upon activation, normal T cell expressed and presumably secreted) is a recently described chemokine that is said to play a role in the recruitment of eosinophils into inflammatory tissue sites. Fibroblasts are a rich source of cytokines and inflammatory mediators. The objective of this study was to demonstrated the expression of the chemokine RANTES in nasal polyp fibroblasts after stimulation with proinflammatory cytokines like TNF-alpha and IL-1 beta. METHODS: Fibroblast lines were established from human nasal polyp biopsy tissues taken from patients with chronic sinusitis who had no other associated diseases. Cultured nasal polyp fibroblasts were stimulated with TNF-alpha or IL-1 beta at various doses (0.1, 1.0, 1 ng/ml) or for various times (l, 6, 12, 24, 48, 72 h). To detect the RANTES gene expression, RT-PCR was performed. The resulting supernatants were assayed with ELISA for the level of RANTES. RESULTS: We demonstrated that TNF-alpha and IL-1 beta induced the gene expression and protein production of RANTES in nasal polyp fibroblasts. This responsiveness to TNF-alpha and IL-1 beta was time and dose-dependent. CONCLUSION: These findings suggest that nasal polypfibroblasts may also play an important role in the recruitment of Eo through the production of RANTES.


Assuntos
Quimiocina CCL5/metabolismo , Fibroblastos/metabolismo , Interleucina-1/farmacologia , Pólipos Nasais/metabolismo , Fator de Necrose Tumoral alfa/farmacologia , Células Cultivadas , Quimiocina CCL5/genética , Relação Dose-Resposta a Droga , Humanos , Pólipos Nasais/patologia , RNA Mensageiro/metabolismo
6.
Oncology ; 58(1): 31-7, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-10644938

RESUMO

Irinotecan (CPT-11) and cisplatin are singly active against cervical cancer. We evaluated the efficacy and toxicity of CPT-11 plus cisplatin as first-line chemotherapy in patients with advanced or recurrent cervical cancer. Twenty-nine chemotherapy-naive patients with advanced or recurrent cervical cancer were treated with CPT-11 (60 mg/m(2)) on days 1, 8, and 15 by intravenous infusion over 90 min, followed by cisplatin (60 mg/m(2) i.v.) on day 1 over 90 min. The patients' median age was 57 years (range 35-75). Nineteen patients (66%) had advanced primary disease. Six patients with recurrent disease (21%) had been treated with prior radiotherapy. The remaining 4 patients (14%) had residual or recurrent disease after radical surgery. The histologic diagnoses were squamous cell carcinoma in 25 patients (87%), adenocarcinoma in 3, and adenosquamous cell carcinoma in 1. All eligible patients were included in the toxicity and response analysis based on the intent to treat. Two patients (7%) achieved a complete response and 15 (52%) a partial response (overall response rate: 59%, 95% confidence interval; 41-74%). Stable disease was recorded in 6 patients (21%) and progressive disease in 3 patients (10%). In 3 patients, image-guided evaluation of response was judged to be unfeasible at the time of independent extramural review (10%). The median time to response was 32 days (range 16-62 days). The median survival was 27. 7+ months (range, 6.4-52.8+ months). Two dose-limiting side effects were observed: grade 3 (28%) or 4 (45%) neutropenia and grade 3 (7%) or 4 (7%) diarrhea. Other severe toxicities included anemia (45%), thrombocytopenia (3%), nausea/vomiting (31%), and alopecia (7%). The combination of CPT-11 with cisplatin is an active regimen for treatment of advanced or recurrent cervical cancer albeit with a significant degree of myelosuppression.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma/tratamento farmacológico , Neoplasias do Colo do Útero/tratamento farmacológico , Adulto , Idoso , Antineoplásicos Fitogênicos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Camptotecina/administração & dosagem , Camptotecina/análogos & derivados , Cisplatino/administração & dosagem , Esquema de Medicação , Feminino , Humanos , Irinotecano , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Estudos Prospectivos , Inibidores da Topoisomerase I , Resultado do Tratamento
7.
Int Arch Allergy Immunol ; 119(4): 314-21, 1999 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-10474037

RESUMO

Eosinophil infiltration of tissue is a hallmark of nasal polyposis and asthma in both atopic and nonatopic patients. Structural cells like airway fibroblasts are a rich source of cytokines and inflammatory mediators. In order to verify whether airway fibroblasts play a role in eosinophilic infiltration, we investigated the release of eosinophil chemotactic and activating factors from airway fibroblasts when stimulated with nonallergenic exogenous agents such as endotoxin (lipopolysaccharide; LPS). Using a number of primary human airway tissue-derived fibroblast lines, we demonstrated that LPS could induce the gene expression and production of RANTES (regulated and normal T cell expressed and presumably secreted) and granulocyte/macrophage colony-stimulating factor (GM-CSF) only in nasal but not in pharyngeal, tracheal, bronchial, and lung fibroblasts. This selective responsiveness of nasal fibroblasts to LPS was time and dose dependent. These findings suggest that nasal fibroblasts may play an important role in the recruitment and activation of eosinophils into nasal polyps through the release of RANTES and GM-CSF.


Assuntos
Quimiocina CCL5/biossíntese , Fibroblastos/efeitos dos fármacos , Fator Estimulador de Colônias de Granulócitos e Macrófagos/biossíntese , Lipopolissacarídeos/farmacologia , Mucosa Nasal/efeitos dos fármacos , Faringe/efeitos dos fármacos , Células Cultivadas , Quimiocina CCL5/análise , Quimiocina CCL5/genética , Ensaio de Imunoadsorção Enzimática , Fibroblastos/química , Fibroblastos/metabolismo , Fator Estimulador de Colônias de Granulócitos e Macrófagos/análise , Fator Estimulador de Colônias de Granulócitos e Macrófagos/genética , Humanos , Mucosa/química , Mucosa/efeitos dos fármacos , Mucosa/metabolismo , Mucosa Nasal/química , Mucosa Nasal/metabolismo , Pólipos Nasais , Osteoma , Seios Paranasais , Faringe/química , Faringe/metabolismo , Reação em Cadeia da Polimerase , RNA Mensageiro/análise
8.
Mol Hum Reprod ; 5(9): 885, 1999 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-10460229

RESUMO

Interleukin-8 (IL-8) is a chemotactic and activating factor for neutrophils which play important roles in host defence mechanisms. The human placenta constitutively produces IL-8 during pregnancy and enhances its production in chorioamnionitis. The present study was designed to investigate in vitro the regulatory mechanism for IL-8 production in the placentas in normal and inflammatory states. Placental cells produced IL-8 in a dose-dependent fashion when stimulated with lipopolysaccharide (LPS). The purified trophoblasts showed significantly higher IL-8 production than untreated placental cells. The expression of IL-8 gene in the trophoblasts in the third trimester was observed by reverse transcription-polymerase chain reaction (RT-PCR). The placental cells also release IL-8 in a dose-dependent manner, in response to r-(recombinant) IL-1alpha and tumour necrosis factor (TNF)-alpha, but not rIL-6. Moreover, LPS-activated placental cells spontaneously produced a much larger amount of IL-8 and showed increased responses to rIL-1alpha and TNF-alpha. It may, therefore, be proposed that placental cells with multiple endocrine functions exert immunological functions by constitutive production of IL-1 and TNF-alpha, which stimulate placental IL-8 release. This cytokine cascade in the placenta may be augmented by LPS in chorioamnionitis, thereby potentiating the feto-maternal defence mechanisms against infection.


Assuntos
Interleucina-1/metabolismo , Interleucina-6/metabolismo , Interleucina-8/biossíntese , Placenta/metabolismo , Fator de Necrose Tumoral alfa/farmacologia , Células Cultivadas , Feminino , Humanos , Interleucina-1/farmacologia , Interleucina-6/farmacologia , Interleucina-8/genética , Cinética , Receptores de Lipopolissacarídeos/imunologia , Receptores de Lipopolissacarídeos/metabolismo , Lipopolissacarídeos , Placenta/citologia , Placenta/efeitos dos fármacos , Gravidez , Proteínas Recombinantes/farmacologia , Valores de Referência , Trofoblastos/metabolismo
9.
Gynecol Obstet Invest ; 47(4): 251-4, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10352387

RESUMO

The objective of this study was to examine the effect of transdermal estrogen therapy on the endometrial thickness and serum hormone levels in anovulatory patients treated with clomiphene citrate (CC). There was a significant difference in endometrial thickness between the CC + transdermal estrogen group and the CC only group from day -2 to day +2. Serum estradiol (E2) levels in the CC + transdermal estrogen group were significantly higher than those in the CC only group on day -2 and day 0. Our results support that addition of transdermal E2 to the treatment protocol of the women treated with CC elicited a favorable response of the endometrium.


Assuntos
Anovulação/tratamento farmacológico , Clomifeno/administração & dosagem , Endométrio/fisiopatologia , Estradiol/administração & dosagem , Infertilidade Feminina/tratamento farmacológico , Indução da Ovulação/métodos , Administração Cutânea , Anovulação/diagnóstico por imagem , Anovulação/fisiopatologia , Muco do Colo Uterino , Clomifeno/uso terapêutico , Endométrio/diagnóstico por imagem , Endométrio/efeitos dos fármacos , Estradiol/sangue , Estradiol/uso terapêutico , Feminino , Humanos , Infertilidade Feminina/diagnóstico por imagem , Infertilidade Feminina/fisiopatologia , Ultrassonografia
10.
Gynecol Oncol ; 72(1): 16-25, 1999 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9889024

RESUMO

In gene therapy, the herpes simplex virus thymidine kinase (HSV-tk) gene is widely used as a suicide agent. Tumor cells expressing HSV-tk are sensitive to nucleoside analogs such as ganciclovir (GCV). An advantage of this system is the bystander killing effect whereby HSV-tk-positive cells exposed to GCV are lethal to surrounding HSV-tk-negative cells. We transfected the HSV-tk gene into a human cervical adenocarcinoma cell line, BU25TK-, and a human endometrial adenocarcinoma cell line, HHUA, by the Lipofectine method. The sensitivity of HSV-tk-positive cells to GCV and bystander killing effect on HSV-tk-negative cells were examined in vitro. HSV-tk-positive cells were sensitive to GCV at concentrations of 1 to 100 microg/ml in a dose- and time-dependent manner. The growth of HSV-tk-negative cells was inhibited when the population of cultured cells contained more than about 3% HSV-tk-positive cells. Moreover, for BU25TK- cells, HSV-tk-positive cells were injected into SCID mice subcutaneously and the effects of GCV therapy and bystander killing at a daily concentration of 25 mg/kg for 14 days were examined. HSV-tk-positive tumors transduced into SCID mice almost disappeared upon GCV treatment. Furthermore, tumor reduction was observed when mixtures of HSV-tk-negative cells containing more than 20% HSV-tk-positive cells were injected into SCID mice. In conclusion, the HSV-tk/GCV system might be applied to both cervical and endometrial adenocarcinoma.


Assuntos
Adenocarcinoma/terapia , Terapia Genética/métodos , Simplexvirus , Timidina Quinase , Neoplasias Uterinas/terapia , Adenocarcinoma/genética , Animais , Feminino , Ganciclovir/uso terapêutico , Humanos , Camundongos , Camundongos SCID , Simplexvirus/genética , Timidina Quinase/genética , Células Tumorais Cultivadas , Neoplasias Uterinas/genética
11.
Acta Otolaryngol ; 119(7): 816-20, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10687940

RESUMO

Nasal polyps is a chronic inflammatory disease of the upper airway characterized by structural abnormalities including stromal fibrosis. Fibroblasts are a rich source of cytokines and inflammatory mediators and are thought to play an important role in the development of fibrosis. In addition, there is considerable evidence for the participation of eosinophils in the pathophysiology of nasal polyps. Although increased numbers of eosinophils are present in nasal polyps, the mechanisms responsible for their selective accumulation are not completely clear. Eotaxin is a chemokine that promotes the selective recruitment of eosinophils. Thus, it may be an important molecule for the recruitment of eosinophils in nasal polyps. The purpose of this study was to investigate whether nasal polyp fibroblasts synthesize eotaxin after stimulation with lipopolysaccharide, IL-1beta or TNF-alpha. Using primary nasal polyp tissue-derived fibroblast lines, we demonstrated that LPS, IL-1beta and TNF-alpha induced the gene expression and protein production of eotaxin in nasal polyp fibroblasts. This responsiveness to LPS, IL-1beta and TNF-alpha was time- and dose-dependent. These findings support the hypothesis that fibroblasts could play an important role in the recruitment of eosinophils in nasal polyps through the production of eotaxin.


Assuntos
Quimiocinas CC , Citocinas/biossíntese , Fibroblastos/metabolismo , Pólipos Nasais/metabolismo , Células Cultivadas , Quimiocina CCL11 , Citocinas/fisiologia , Relação Dose-Resposta a Droga , Eosinófilos/patologia , Fibroblastos/fisiologia , Humanos , Interleucina-1/farmacologia , Lipopolissacarídeos/farmacologia , Pólipos Nasais/etiologia , Pólipos Nasais/patologia , Fatores de Tempo , Fator de Necrose Tumoral alfa/farmacologia
12.
Anticancer Res ; 18(5A): 3411-9, 1998.
Artigo em Inglês | MEDLINE | ID: mdl-9858917

RESUMO

In gene therapy, tumor cells expressing herpes simplex virus thymidine kinase (HSV-tk) are sensitive to ganciclovir (GCV) and HSV-tk positive cells exposed to GCV are lethal to adjacent HSV-tk negative cells. This phenomenon has been called the bystander effect, and the gap junction is thought to mediate it. In this study, sensitivity to GCV and bystander effect in a human choriocarcinoma cell line, BeWo, transfected with HSV-tk were investigated. Furthermore, the effect of 8-bromo-cAMP on bystander effect and connexin40 gene transcription were examined. HSV-tk positive cells were sensitive to GCV at the concentration of 10 micrograms/ml in a time-dependent manner. The growth of HSV-tk negative cells was inhibited when the population of cultured cells contained more than 10% HSV-tk positive cells and 8-bromo-cAMP enhanced bystander effect. 8-bromo- cAMP increased connexin40 mRNA expression and gap junctional intercellular communication.


Assuntos
8-Bromo Monofosfato de Adenosina Cíclica/farmacologia , Comunicação Celular/efeitos dos fármacos , Coriocarcinoma/terapia , Ganciclovir/farmacologia , Terapia Genética , Simplexvirus/enzimologia , Timidina Quinase/metabolismo , Sobrevivência Celular , Coriocarcinoma/fisiopatologia , Terapia Combinada , Humanos , Plasmídeos/uso terapêutico , Timidina Quinase/genética , Células Tumorais Cultivadas/efeitos dos fármacos
14.
Endocr J ; 45(4): 467-73, 1998 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-9881895

RESUMO

The cDNA of the common alpha-subunit of human glycoprotein hormone was mutated by site directed mutagenesis in the CMGCC region composed of cysteine-methionine-glycine-cysteine-cysteine (position 28-32). The cDNA of wild-type human thyrotropin (hTSH) beta-subunit and that of wild-type or mutant common alpha-subunits were co-transfected into COS-I cells. The concentration of hTSH determined by two immunoradiometric assay systems was detectable in culture media of COS-I cells transfected with wild-type (CMGCC) and a mutant (CRGCC) alpha-subunits but not four other mutants (YMGCC) (CMRCC) (CMACC) (CMDCC). The present data with the other studies on wild-type or mutant glycoprotein hormones support our hypothesis that an amino acid motif of "C-X-G-X-C" in the common alpha-(CMGCC in human) and beta-(CAGYC in human) subunits play an important role in biosynthesis of glycoprotein hormones in all species.


Assuntos
Subunidade alfa de Hormônios Glicoproteicos/genética , Tireotropina/genética , Substituição de Aminoácidos , Animais , Células COS , Eletroporação , Subunidade alfa de Hormônios Glicoproteicos/química , Humanos , Imunoensaio , Mutagênese Sítio-Dirigida , Radioimunoensaio , Kit de Reagentes para Diagnóstico , Análise de Sequência de DNA , Homologia de Sequência , Tireotropina/análise , Tireotropina/química , Transfecção
15.
Acta Otolaryngol Suppl ; 539: 71-5, 1998.
Artigo em Inglês | MEDLINE | ID: mdl-10095866

RESUMO

Although several studies have demonstrated that low-dose, long-term 14-member macrolides (erythromycin (EM), roxithromycin (RXM), clarithromycin (CAM)) are effective in the treatment of chronic airway diseases like chronic sinusitis and diffuse panbronchiolitis (DPB), the mechanism of action of these drugs is not yet clear. Both these airway diseases are associated with an increase in the proliferation of fibroblasts. Moreover, fibroblasts are also an important source of proinflammatory cytokines such as interleukin-8 (IL-8), that play an important role in the pathogenesis of nasal polyps. Therefore, using primary fibroblast lines derived from nasal polyps, we investigated the effect of RXM on the synthesis of IL-8 and proliferation of nasal polyp fibroblasts (NPF). These fibroblasts were either treated with lipopolysaccharide (LPS) and RXM for 24 h, or pre-incubated with RXM for 24 h and then treated with LPS and RXM for 24 h. The level of IL-8 mRNA in NPF was analysed by reverse transcriptase-polymerase chain (RT-PCR) and the level of IL-8 in culture supernatants was measured by ELISA. Next, the proliferative capacity of NPF after treatment with RXM was analysed by cell counting and 3H-thymidine uptake. RXM had no effect on LPS-induced IL-8 synthesis by NPF. On the other hand, RXM suppressed the proliferation of NPF in a dose-dependent manner. These findings suggest that, although RXM cannot directly inhibit the synthesis of IL-8, it probably reduces IL-8 production by inhibiting the proliferation of NPF.


Assuntos
Antibacterianos/farmacologia , Fibroblastos/efeitos dos fármacos , Interleucina-8/biossíntese , Pólipos Nasais/imunologia , Roxitromicina/farmacologia , Contagem de Células/efeitos dos fármacos , Linhagem Celular , Relação Dose-Resposta a Droga , Fibroblastos/metabolismo , Humanos , Interleucina-8/química , Lipopolissacarídeos/farmacologia , Pólipos Nasais/metabolismo
16.
J Immunol ; 159(6): 2599-605, 1997 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-9300678

RESUMO

The present study investigates the effect of IL-12 administration on the generation of lymphoid cells that exhibit cytotoxicity against tumor cells expressing Fas Ag. Systemic injection of rIL-12 into BALB/c or (B6C3)F1 mice bearing syngeneic CSA1M or OV-HM tumor induced complete tumor regression. CSA1M tumor cells expressed Fas Ag, and exposure of these cells to IFN-gamma enhanced Fas expression. In contrast, Fas Ag was hardly detected on OV-HM cells even after IFN-gamma exposure. Only CSA1M cells were lysed by anti-Fas mAb or cells expressing Fas ligand (FasL), indicating that Fas on CSA1M cells is functional in mediating cell death. An increase in the frequency of lymphoid cells characterized as CD3+ CD4- CD8- B220+ was observed in spleens from both CSA1M and OV-HM tumor-bearing mice after IL-12 treatment. A splenic population enriched in cells with these unique phenotypes exhibited considerable degrees of cytotoxicity against Fas+ CSA1M, but not against Fas- OV-HM tumor cells. The lysis of CSA1M cells was almost completely blocked by addition of Fas-Fc, a fusion protein between the extracellular domain of mouse Fas and the Cgamma1 domain of human Ig. Regressing CSA1M and OV-HM tumor masses after IL-12 treatment exhibited a massive lymphoid cell infiltration and expressed significant levels of FasL mRNA, suggesting the infiltration of FasL-expressing cells to tumor sites. These results indicate that IL-12 induces the expansion of lymphoid cells that exhibit FasL-mediated cytolytic activity and accumulate into regressing tumor masses.


Assuntos
Citotoxicidade Imunológica , Interleucina-12/administração & dosagem , Neoplasias Experimentais/imunologia , Subpopulações de Linfócitos T/imunologia , Receptor fas/imunologia , Animais , Complexo CD3/imunologia , Antígenos CD4/imunologia , Antígenos CD8/imunologia , Humanos , Antígenos Comuns de Leucócito/imunologia , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Células Tumorais Cultivadas
17.
Hum Pathol ; 28(7): 862-5, 1997 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-9224757

RESUMO

In several human cancers, it has been recently reported that abnormally altered status of genomic imprinting is related to oncogenesis. In this study, we investigated the expression of three imprinted genes in a case with malignant mixed Müllerian tumor of the uterus (MMMT). In the tumor, expression of H19 showed marked upregulation (6.3-fold) with biallelic expression compared with that in the corresponding normal myometrium. The 5'-promoter region of H19 was hypomethylated in the tumor, whereas it was hemimethylated in the myometrium. Expression of the small nuclear ribonucleoprotein polypeptide N gene (SNRPN) was also upregulated by 1.9-fold. However, the insulin-like growth factor II gene (IGF2) was expressed at low levels in both myometrium and MMMT. The overexpression of H19 is caused by reactivation of the repressed allele of H19 due to demethylation of CpG islands within its 5'-promoter region. Whether upregulation of SNRPN is caused by its biallelic expression remains undetermined because restriction fragment length polymorphisms (RFLP) sites were not informative in SNRPN and IGF2. In conclusion, H19 and SNRPN may play significant roles in the tumorigenesis of MMMT and H19 may have tumor-promoting activity in addition to its known tumor-suppressing activity, probably depending on the tissue and the local milieu.


Assuntos
Autoantígenos/genética , Genes Supressores de Tumor/genética , Tumor Mulleriano Misto/genética , Proteínas Musculares/genética , RNA não Traduzido , Ribonucleoproteínas Nucleares Pequenas/genética , Neoplasias Uterinas/genética , Northern Blotting , Metilação de DNA , DNA de Neoplasias , Feminino , Impressão Genômica , Humanos , Pessoa de Meia-Idade , Tumor Mulleriano Misto/patologia , Reação em Cadeia da Polimerase , RNA Longo não Codificante , Regulação para Cima , Neoplasias Uterinas/patologia , Proteínas Centrais de snRNP
18.
Int J Gynaecol Obstet ; 57(2): 153-9, 1997 May.
Artigo em Inglês | MEDLINE | ID: mdl-9184952

RESUMO

OBJECTIVE: To establish a clinical method for immediate diagnosis of histological chorioamnionitis, by maternal blood sampling at term. METHOD: The sera of 22 mothers with chorioamnionitis and 81 mothers without chorioamnionitis at term delivery were collected. The serum levels of cytokines including interleukin-1 alpha (IL-1 alpha), interleukin-1 beta (IL-1 beta), tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6) and interleukin-8 (IL-8) were titered and other conventional markers such as white blood cell and CRP were measured simultaneously. Chorioamnionitis was histopathologically confirmed after delivery. RESULT: The sera of mothers with histological chorioamnionitis showed a significant increase in IL-8 titer, but not in those of other cytokines or conventional markers, compared with those without chorioamnionitis. A positive correlation was observed between maternal and cord serum IL-8 levels. Maternal IL-8 showed the highest predictive value for diagnosis of histological chorioamnionitis. CONCLUSION: Measurement of maternal IL-8 is useful for rapid prenatal screening of histological chorioamnionitis at term.


Assuntos
Corioamnionite/prevenção & controle , Interleucina-8/sangue , Programas de Rastreamento/métodos , Resultado da Gravidez , Diagnóstico Pré-Natal/métodos , Adulto , Biomarcadores/sangue , Corioamnionite/sangue , Citocinas/sangue , Citocinas/metabolismo , Feminino , Humanos , Interleucina-8/metabolismo , Gravidez , Terceiro Trimestre da Gravidez , Valores de Referência , Estudos Retrospectivos , Sensibilidade e Especificidade
19.
Biol Reprod ; 56(5): 1274-80, 1997 May.
Artigo em Inglês | MEDLINE | ID: mdl-9160728

RESUMO

The production of leukemia inhibitory factor (LIF) is suggested to be critical for the successful implantation of blastocysts into decidua, because LIF expression is essential for the implantation of mouse blastocytes. We investigated the regulation of LIF production by decidual cytokines and steroid hormones. Stimulation of decidual cells by interleukin-1, tumor necrosis factor alpha, or transforming growth factor beta augmented LIF production in a dose-dependent manner. Moreover, estradiol, a steroid hormone that increases during ovulation and early pregnancy, also enhanced LIF production in a dose-dependent manner. These responses were blocked by protein kinase C (PKC) inhibitor but not by other kinase inhibitors, suggesting an important role of PKC in decidual LIF production mediated by cytokines and estradiol. We also showed that stimulating decidual cells with LIF failed to stimulate DNA synthesis and prolactin production in these cells. In summary, LIF was mainly localized in the decidual glands and stroma, and its production was increased by cytokines and estradiol in a dose-dependent fashion; but stimulation of decidual cells by LIF did not influence their proliferation or their prolactin production.


Assuntos
Citocinas/farmacologia , Decídua/efeitos dos fármacos , Decídua/metabolismo , Estradiol/farmacologia , Inibidores do Crescimento/biossíntese , Interleucina-6 , Linfocinas/biossíntese , Animais , Divisão Celular/efeitos dos fármacos , Decídua/citologia , Inibidores Enzimáticos/farmacologia , Feminino , Humanos , Imuno-Histoquímica , Técnicas In Vitro , Interleucina-1/farmacologia , Fator Inibidor de Leucemia , Camundongos , Gravidez , Prolactina/biossíntese , Proteína Quinase C/antagonistas & inibidores , Transdução de Sinais , Fator de Crescimento Transformador beta/farmacologia , Fator de Necrose Tumoral alfa/farmacologia
20.
Transfus Sci ; 18(1): 55-62, 1997 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10174293

RESUMO

To evaluate the clinical implications of peri-operative transfusion in the surgical treatment of uterine cervical cancer, a detailed analysis of the cumulative survival rate was performed using clinical data from 145 patients with FIGO stage Ib cervical cancer of the squamous cell type acquired between 1982 and 1989 at the Center for Adult Diseases. The cumulative survival rate was statistically analyzed using the Kaplan Meier method. Of the 145 patients with stage Ib cancer, 103 were considered to have undergone complete excision and received no further treatment post-operatively, and 42 were considered to have undergone incomplete excision because of the involvement of lymph nodes or the lymphovascular space. Of the 79 patients in the former group who received peri-operative transfusion, 69 received less than seven units (1400 mL) and 10 received more than eight units (1600 mL). The cumulative 5-year survival rate was 100% in the 24 patients who received no transfusions, 91.7% in those who received less than 1400 mL, and 90.0% in those who received more than 1600 mL. Similarly, of the 42 patients in the incomplete excision group, nine did not receive any peri-operative transfusion, 27 received less than 1400 mL, and six received more than 1600 mL. The 5-year survival rate in these groups was 88.9, 77.8 and 50.0%, respectively. The survival rate of our patients with stage Ib cervical cancer without peri-operative transfusion was significantly higher than that of those with transfusion, regardless of post-operative irradiation therapy status, indicating that peri-operative transfusion has an adverse influence on the prognosis in cervical cancer.


Assuntos
Perda Sanguínea Cirúrgica/prevenção & controle , Transfusão de Sangue , Neoplasias do Colo do Útero/cirurgia , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Análise de Sobrevida , Reação Transfusional , Transplante Homólogo , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/fisiopatologia
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