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1.
Tijdschr Psychiatr ; 64(9): 558-565, 2022.
Artigo em Holandês | MEDLINE | ID: mdl-36349850

RESUMO

BACKGROUND: Psychiatric disorders are associated with a more severe course of COVID-19. COVID-19 can also lead to psychiatric symptoms. AIM: To gain insight into vulnerabilities and protective factors for the course of COVID-19 in a Dutch (neuro)psychiatric population. METHOD: Patients were divided into three groups: patients with pre-existent mental disorders without and with new (neuro)psychiatric symptoms (NPS) during COVID-19 and patients without pre-existent mental disorders who developed de novo NPS during COVID-19. We summarize the characteristics of each group and compare the subgroups with inferential statistics. RESULTS: 186 patients were included in the case register. Patients with NPS showed a more severe course of COVID-19. Mortality in patients with NPS was higher in patients with pre-existent mental disorders compared to patients without pre-existent mental disorders. The most frequently reported de novo psychiatric symptoms during COVID-19 were delirium (46-70%), anxiety (53-54%) and insomnia (18-42%). CONCLUSION: NPS might be an expression of a more severe COVID-19 episode. In patients who developed NPS during COVID-19 we found evidence for a higher mortality risk in patients with pre-existent mental disorders. Extra vigilance for neuropsychiatric symptoms during COVID-19 is warranted.


Assuntos
COVID-19 , Transtornos Mentais , Distúrbios do Início e da Manutenção do Sono , Humanos , Transtornos Mentais/epidemiologia , Transtornos Mentais/psicologia , Ansiedade/epidemiologia , Ansiedade/psicologia , Transtornos de Ansiedade
2.
Mol Psychiatry ; 18(7): 788-98, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22889921

RESUMO

Obsessive-compulsive disorder (OCD) is a common, debilitating neuropsychiatric illness with complex genetic etiology. The International OCD Foundation Genetics Collaborative (IOCDF-GC) is a multi-national collaboration established to discover the genetic variation predisposing to OCD. A set of individuals affected with DSM-IV OCD, a subset of their parents, and unselected controls, were genotyped with several different Illumina SNP microarrays. After extensive data cleaning, 1465 cases, 5557 ancestry-matched controls and 400 complete trios remained, with a common set of 469,410 autosomal and 9657 X-chromosome single nucleotide polymorphisms (SNPs). Ancestry-stratified case-control association analyses were conducted for three genetically-defined subpopulations and combined in two meta-analyses, with and without the trio-based analysis. In the case-control analysis, the lowest two P-values were located within DLGAP1 (P=2.49 × 10(-6) and P=3.44 × 10(-6)), a member of the neuronal postsynaptic density complex. In the trio analysis, rs6131295, near BTBD3, exceeded the genome-wide significance threshold with a P-value=3.84 × 10(-8). However, when trios were meta-analyzed with the case-control samples, the P-value for this variant was 3.62 × 10(-5), losing genome-wide significance. Although no SNPs were identified to be associated with OCD at a genome-wide significant level in the combined trio-case-control sample, a significant enrichment of methylation QTLs (P<0.001) and frontal lobe expression quantitative trait loci (eQTLs) (P=0.001) was observed within the top-ranked SNPs (P<0.01) from the trio-case-control analysis, suggesting these top signals may have a broad role in gene expression in the brain, and possibly in the etiology of OCD.


Assuntos
Predisposição Genética para Doença/genética , Estudo de Associação Genômica Ampla , Proteínas do Tecido Nervoso/genética , Transtorno Obsessivo-Compulsivo/genética , Estudos de Casos e Controles , Lobo Frontal/metabolismo , Humanos , Pais , Polimorfismo de Nucleotídeo Único/genética , Locos de Características Quantitativas/genética , Proteínas Associadas SAP90-PSD95 , População Branca/genética
3.
Dis Esophagus ; 27(4): 380-7, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24006852

RESUMO

The implementation of neoadjuvant chemoradiotherapy (CRT) in esophageal cancer (EC) patients has led to improved survival rates. Worldwide, different CRT regimens are applied. It is unknown how these regimens relate to each other regarding efficacy. Therefore, the aim of this study was to determine the preferred regimen regarding toxicity of, response to CRT, and long-term survival after esophagectomy in EC patients. EC patients in two centers who underwent CRT with different regimens prior to surgery were included in this study. CRT consisted of 50.4Gy combined with two cycles of cisplatin and 5-FU(center A), or 41.4Gy combined with five cycles of carboplatin and paclitaxel (center B). Toxicity, response to therapy and long-term survival were compared between groups. One hundred sisty-five patients were included. Forty-one percent of patients in center A developed ≥1 toxicity ≥ grade 3 versus 25% in center B (P = 0.025). CRT with a cisplatin-based regimen was an independent predictor for development of toxicity ≥ grade 3 (P = 0.043). There were no differences in response between both regimens (P = 0.904). Three-year survival was 61% (A) versus 57% (B) (P = 0.725). The carboplatin/paclitaxel/41.4Gy regimen causes less toxicity compared to the cisplatin/5-FU/50.4Gy regimen with nonsignificant differences in response rates and long-term survival; therefore our results support this regimen to be the preferred regimen for EC patients.


Assuntos
Adenocarcinoma/terapia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/terapia , Quimiorradioterapia , Neoplasias Esofágicas/terapia , Terapia Neoadjuvante , Idoso , Carboplatina/administração & dosagem , Cisplatino/administração & dosagem , Estudos de Coortes , Carcinoma de Células Escamosas do Esôfago , Esofagectomia , Feminino , Fluoruracila/administração & dosagem , Humanos , Masculino , Pessoa de Meia-Idade , Paclitaxel/administração & dosagem , Doses de Radiação , Estudos Retrospectivos , Resultado do Tratamento
4.
Tijdschr Psychiatr ; 56(1): 54-7, 2014.
Artigo em Holandês | MEDLINE | ID: mdl-24446228

RESUMO

Body integrity identity disorder (BIID) is a rare condition in which a person, for no apparent physical reason, is tormented by the experience that a body-part, such as a limb, does not really belong to the body. Patients experience an intense desire for the limb to be amputated (a 'desire' formerly referred to as 'apotemnophilia'). We report on a 58-year-old male patient with BIID who froze one of his legs so that he could amputate it himself. A surgeon ultimately intervened and amputated the leg professionally. The patient was extremely relieved and was still experiencing relief at a follow-up three years later.


Assuntos
Amputação Cirúrgica/psicologia , Transtornos Dismórficos Corporais/psicologia , Automutilação/psicologia , Humanos , Traumatismos da Perna/cirurgia , Masculino , Pessoa de Meia-Idade
5.
Dis Esophagus ; 26(5): 510-6, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22925313

RESUMO

Esophagectomy in elderly esophageal carcinoma patients is correlated with a high morbidity and even mortality. Studies on neoadjuvant chemoradiotherapy (NT) in elderly patients are scarce. The aim of this study was to evaluate the effect of advanced age in combination with NT in esophageal carcinoma patients who underwent an esophagectomy. Patients who underwent NT prior to esophagectomy between 1993 and 2010 were divided into three groups: <70, 70-74, and ≥75 years. Toxicity of NT and postoperative morbidity were compared between groups. Primary endpoints were toxicity, complication rate, and survival. Two hundred thirteen patients underwent NT during the study period, 26 were aged 70-74 years, and 17 were ≥70 years. Toxicity of NT was comparable for younger and elderly patients (46% vs. 54% vs. 47%, P = 0.263). Overall complications occurred in 62% of younger patients versus 73% and 71% among patients aged 70-74 years and ≥75 years, respectively (P = 0.836). Cardiac complications occurred in 14% of younger patients versus 27% and 41% of elderly patients (P = 0.021). Three-year survival rates were 59% versus 44% versus 31% among patients aged <70, 70-74, and ≥75 years, respectively (P = 0.237). Higher age (odds ratio 1.750, P < 0.001) was an independent risk factor for development of cardiac complications. Toxicity of NT and postoperative complications are comparable for patients aged <70, 70-74, and ≥75 years, with the exception of cardiac complications. Therefore, we consider NT followed by esophagectomy in elderly patients a safe treatment modality in our center.


Assuntos
Adenocarcinoma/terapia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma de Células Escamosas/terapia , Quimiorradioterapia Adjuvante/efeitos adversos , Neoplasias Esofágicas/terapia , Esofagectomia/efeitos adversos , Terapia Neoadjuvante/efeitos adversos , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Fibrilação Atrial/etiologia , Carboplatina/administração & dosagem , Fracionamento da Dose de Radiação , Feminino , Doenças Hematológicas/etiologia , Mortalidade Hospitalar , Humanos , Masculino , Pessoa de Meia-Idade , Paclitaxel/administração & dosagem , Estudos Retrospectivos , Taxa de Sobrevida
6.
Ann Surg Oncol ; 19(3): 766-71, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21979112

RESUMO

BACKGROUND: The body mass index (BMI) in the general population has increased over the past decades. A high BMI is a known risk factor for the development of esophageal adenocarcinoma. Several studies on the influence of a high BMI on the postoperative course and survival after esophagectomy have shown contradictory results. The aim of the present study was to determine the influence of a high BMI on postoperative complications and survival among a large cohort of esophageal cancer patients. METHODS: Patients who underwent an esophagectomy between 1993 and 2010 were divided into three groups according to their BMI: normal weight (<25 kg/m(2)), overweight (25-30 kg/m(2)) or obese (≥ 30 kg/m(2)). Severity of complications was scored according to the Dindo classification, which was divided into three categories: no complications, minor to moderate complications, and severe complications. Long-term survival was determined according to the Kaplan-Meier method. RESULTS: A total of 736 esophagectomy patients were divided into three groups: normal weight (n = 352), overweight (n = 308), and obese (n = 72). Complications rates were similar for all groups (65-72%, P = 0.241). The incidence of anastomotic leakage was higher among obese patients compared to the other groups (20% vs. 10-12% respectively, P = 0.019), but there was no significant difference between the three groups regarding the severity of complications according to the Dindo classification (P = 0.660) or in 5-year survival rates (P = 0.517). CONCLUSIONS: A high BMI is not associated with an increased incidence or severity of complications after esophagectomy; however, anastomotic leakage occurred more frequently in obese patients. Five-year survival rates were not influenced by the preoperative BMI. A high BMI is therefore ought not be an exclusion criterion for esophagectomy.


Assuntos
Adenocarcinoma/mortalidade , Índice de Massa Corporal , Carcinoma de Células Escamosas/mortalidade , Neoplasias Esofágicas/mortalidade , Esofagectomia , Obesidade/complicações , Complicações Pós-Operatórias , Adenocarcinoma/complicações , Adenocarcinoma/cirurgia , Idoso , Carcinoma de Células Escamosas/complicações , Carcinoma de Células Escamosas/cirurgia , Neoplasias Esofágicas/complicações , Neoplasias Esofágicas/cirurgia , Esofagectomia/efeitos adversos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Sobrepeso/complicações , Taxa de Sobrevida
7.
Dig Surg ; 29(3): 206-12, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22688597

RESUMO

BACKGROUND: Routine imaging (RI) as part of follow-up after potentially curative esophagectomy is currently not widely accepted. If detected recurrent disease could be adequately treated, it remains unclear whether patients would want to take part in a screening program. The aim of this study was to determine the extent to which patients who underwent esophagectomy prefer follow-up with or without RI. METHODS: Patients who underwent esophagectomy for carcinoma without evidence of recurrent disease were included. An interview-administered questionnaire was used to assess fear of recurrence and elicit patient preferences for the frequency and duration of follow-up and hypothetical changes of survival chances (1-10%). RESULTS: 45/54 eligible patients (83%) participated in this study. The majority of patients preferred follow-up with RI (67%) even if screening would not provide a survival benefit; this proportion increased up to 93% if the proposed chances of survival improved. Younger patients and patients with a lower histopathological tumor stage were more likely to desire follow-up with RI. CONCLUSION: Most patients who underwent esophagectomy preferred RI as part of follow-up over outpatient clinic visits only, even if such screening would not provide a survival benefit. Further research is needed to determine the most accurate screening modality and most efficient follow-up interval.


Assuntos
Adenocarcinoma/cirurgia , Carcinoma de Células Escamosas/cirurgia , Neoplasias Esofágicas/cirurgia , Recidiva Local de Neoplasia/diagnóstico , Preferência do Paciente , Vigilância da População , Adenocarcinoma/diagnóstico por imagem , Idoso , Carcinoma de Células Escamosas/diagnóstico por imagem , Distribuição de Qui-Quadrado , Neoplasias Esofágicas/diagnóstico por imagem , Esofagectomia , Medo , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Imagem Multimodal , Análise Multivariada , Recidiva Local de Neoplasia/diagnóstico por imagem , Recidiva Local de Neoplasia/psicologia , Exame Físico , Tomografia por Emissão de Pósitrons , Fatores de Tempo , Tomografia Computadorizada por Raios X
8.
Dis Esophagus ; 25(6): 555-9, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22150869

RESUMO

One of the objectives of preoperative imaging in esophageal cancer patients is the detection of cervical lymph node metastases. Traditionally, external ultrasonography of the neck has been combined with computed tomography (CT) in order to improve the detection of cervical metastases. In general, integrated positron emission tomography-computed tomography (PET-CT) has been shown to be superior to CT or PET regarding staging and therefore may limit the role of external ultrasonography of the neck. The objective of this study was to determine the additional value of external ultrasonography of the neck to PET-CT. This study included all patients referred our center for treatment of esophageal carcinoma. Diagnostic staging was performed to determine treatment plan. Cervical lymph nodes were evaluated by external ultrasonography of the neck and PET-CT. In case of suspect lymph nodes on external ultrasonography or PET-CT, fine needle aspiration (FNA) was performed. Between 2008 and 2010, 170 out of 195 referred patients underwent both external ultrasonography of the neck and PET-CT. Of all patients, 84% were diagnosed with a tumor at or below the distal esophagus. In 140 of 170 patients, the cervical region was not suspect; no FNA was performed. Seven out of 170 patients had suspect nodes on both PET-CT and external ultrasonography. Five out of seven patients had cytologically confirmed malignant lymph nodes, one of seven had benign nodes, in one patient FNA was not performed; exclusion from esophagectomy was based on intra-abdominal metastases. In one out of 170 patients, PET-CT showed suspect nodes combined with a negative external ultrasonography; cytology of these nodes was benign. Twenty-two out of 170 patients had a negative PET-CT with suspect nodes on external ultrasonography. In 18 of 22 patients, cervical lymph nodes were cytologically confirmed benign; in four patients, FNA was not possible or inconclusive. At a median postoperative follow-up of 15 months, only 1% of patients developed cervical lymph node metastases. This study shows no additional value of external ultrasonography to a negative PET-CT. According to our results, it can be omitted in the primary workup. However, suspect lymph nodes on PET-CT should be confirmed by FNA to exclude false positives if it would change treatment plan.


Assuntos
Adenocarcinoma/diagnóstico , Carcinoma de Células Escamosas/diagnóstico , Neoplasias Esofágicas/diagnóstico , Metástase Linfática/diagnóstico por imagem , Imagem Multimodal/métodos , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Adenocarcinoma/secundário , Idoso , Neoplasias Esofágicas/patologia , Feminino , Fluordesoxiglucose F18 , Humanos , Linfonodos/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Pescoço , Estadiamento de Neoplasias/métodos , Compostos Radiofarmacêuticos , Ultrassonografia
9.
Science ; 248(4958): 1000-3, 1990 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-17745407

RESUMO

Previously unknown strike-slip and normal faults in the central and eastern Mojave Desert have been revealed on Landsat Thematic Mapper images enhanced by four-component processing. This method provides color images on which lithologies are discriminated by their contrasting absorption and reflection, primarily at infrared wavelengths and particularly with regard to their ferric iron, ferrous iron, and hydroxyl contents, while retaining landform depiction. These discriminants represent a new type of geophysical display for geologic mapping in regions of well-exposed bedrock. Faults are revealed on the images by abrupt spectral and textural contrasts that coincide with aligned topographic features. The newly discovered faults form part of an extensive regional network of right shear that connects faults in the Death Valley region with the San Andreas fault system. They support a heterogeneous strain model for late Cenozoic tectonic evolution of the region. Regional structural relations indicate a westward migration of the locus of strain through time. Some of the newly identified faults bound blocks that have experienced contrasting rotational histories since early Miocene time.

10.
Science ; 218(4576): 1004-20, 1982 Dec 03.
Artigo em Inglês | MEDLINE | ID: mdl-17790589

RESUMO

The shuttle imaging radar (SIR-A) carried on the space shuttle Columbia in November 1981 penetrated the extremely dry Selima Sand Sheet, dunes, and drift sand of the eastern Sahara, revealing previously unknown buried valleys, geologic structures, and possible Stone Age occupation sites. Radar responses from bedrock and gravel surfaces beneath windblown sand several centimeters to possibly meters thick delineate sand- and alluvium-filled valleys, some nearly as wide as the Nile Valley and perhaps as old as middle Tertiary. The now-vanished major river systems that carved these large valleys probably accomplished most of the erosional stripping of this extraordinarily flat, hyperarid region. Underfit and incised dry wadis, many superimposed on the large valleys, represent erosion by intermittent running water, probably during Quaternary pluvials. Stone Age artifacts associated with soils in the alluvium suggest that areas near the wadis may have been sites of early human occupation. The presence of old drainage networks beneath the sand sheet provides a geologic explanation for the locations of many playas and present-day oases which have been centers of episodic human habitation. Radar penetration of dry sand and soils varies with the wavelength of the incident signals (24 centimeters for the SIR-A system), incidence angle, and the electrical properties of the materials, which are largely determined by moisture content. The calculated depth of radar penetration of dry sand and granules, based on laboratory measurements of the electrical properties of samples from the Selima Sand Sheet, is at least 5 meters. Recent (September 1982) field studies in Egypt verified SIR-A signal penetration depths of at least 1 meter in the Selima Sand Sheet and in drift sand and 2 or more meters in sand dunes.

11.
Injury ; 50(7): 1392-1397, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31176480

RESUMO

INTRODUCTION: Rotational type ankle fractures with a concomitant fracture of the posterior malleolus are associated with a poorer clinical outcome as compared to ankle fractures without. However, clinical implications of posterior malleolar (PM) fracture morphology and pattern have yet to be established. Many studies on this subject report on fragment size, rather than fracture morphology based on computed tomography (CT). The overall purpose of the current study was to elucidate the correlation of PM fracture morphology and functional outcome, assessed with CT imaging and not with -unreliable- plain radiographs. METHODS: Between January 2010 and May 2014, 194 patients with an operatively (ORIF) treated ankle fracture, were prospectively included in the randomized clinical EF3X-trial at our Level-I trauma center. The current study retrospectively included 73 patients with rotational type ankle fractures and concomitant fractures of the posterior malleolus. According to the CT-based Haraguchi fracture morphology, all patients were divided into three groups: 20 Type I (large posterolateral-oblique), 21 Type II (transverse medial-extension) and 32 Type III (small-shell fragment). At 12 weeks, 1 year and 2 years postoperatively the Foot and Ankle Outcome Scores (FAOS) and SF-36 scores were obtained, with the FAOS domain scores at two years postoperative as primary study outcome. Statistical analysis included a multivariate regression and secondary a mixed model analysis. RESULTS: Haraguchi Type II PM ankle fractures demonstrated significantly poorer outcome scores at two years follow-up compared to Haraguchi Types I and III. Mean FAOS domain scores at two years follow-up showed to be significantly worse in Haraguchi Type II as compared to Type III, respectively: Symptoms 48.2 versus 61.7 (p = 0.03), Pain 58.5 versus 84.4 (p < 0.01), Activities of Daily Living (ADL) 64.1 versus 90.5 (p < 0.01). CONCLUSION: Posterior malleolar ankle fractures with medial extension of the fracture line (i.e. Haraguchi Type II) are associated with significantly poorer functional outcomes. The current dogma to fix PM fractures that involve at least 25-33% of the tibial plafond may be challenged, as posterior malleolar fracture pattern and morphology - rather than fragment size - seem to determine outcome.


Assuntos
Fraturas do Tornozelo/fisiopatologia , Articulação do Tornozelo/patologia , Consolidação da Fratura/fisiologia , Amplitude de Movimento Articular/fisiologia , Fraturas da Tíbia/patologia , Adulto , Fraturas do Tornozelo/diagnóstico por imagem , Fraturas do Tornozelo/cirurgia , Articulação do Tornozelo/diagnóstico por imagem , Articulação do Tornozelo/cirurgia , Fenômenos Biomecânicos , Feminino , Fixação Interna de Fraturas , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Radiografia , Fraturas da Tíbia/diagnóstico por imagem , Fraturas da Tíbia/cirurgia , Resultado do Tratamento
12.
J Natl Cancer Inst ; 92(9): 699-708, 2000 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-10793106

RESUMO

BACKGROUND: A randomized trial conducted by the Gynecologic Oncology Group (GOG, study #111) in the United States showed a better outcome for patients with advanced ovarian cancer on the paclitaxel-cisplatin regimen than for those on a standard cyclophosphamide-cisplatin regimen. Before considering the paclitaxel-cisplatin regimen as the new "standard," a group of European and Canadian investigators planned a confirmatory phase III trial. METHODS: This intergroup trial recruited 680 patients with broader selection criteria than the GOG #111 study and administered paclitaxel as a 3-hour instead of a 24-hour infusion; progression-free survival was the primary end point. Patient survival was analyzed by use of the Kaplan-Meier technique. Treatment effects on patient survival were estimated by Cox proportional hazards regression models. All statistical tests were two-sided. RESULTS: The overall clinical response rate was 59% in the paclitaxel group and 45% in the cyclophosphamide group; the complete clinical remission rates were 41% and 27%, respectively; both differences were statistically significant (P =.01 for both). At a median follow-up of 38.5 months and despite a high rate of crossover (48%) from the cyclophosphamide arm to the paclitaxel arm at first detection of progression of disease, a longer progression-free survival (log-rank P =.0005; median of 15.5 months versus 11.5 months) and a longer overall survival (log-rank P =. 0016; median of 35.6 months versus 25.8 months) were seen in the paclitaxel regimen compared with the cyclophosphamide regimen. CONCLUSIONS: There is strong and confirmatory evidence from two large randomized phase III trials to support paclitaxel-cisplatin as the new standard regimen for treatment of patients with advanced ovarian cancer.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Ovarianas/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Alopecia/induzido quimicamente , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Terapia Combinada , Estudos Cross-Over , Ciclofosfamida/administração & dosagem , Ciclofosfamida/efeitos adversos , Progressão da Doença , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Náusea/induzido quimicamente , Estadiamento de Neoplasias , Neutropenia/induzido quimicamente , Neoplasias Ovarianas/mortalidade , Neoplasias Ovarianas/cirurgia , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos , Análise de Sobrevida , Trombocitopenia/induzido quimicamente , Fatores de Tempo , Resultado do Tratamento , Vômito/induzido quimicamente
13.
Cancer Res ; 56(16): 3782-7, 1996 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-8706024

RESUMO

We have shown previously that immunization of B6 mice (H-2b) with tumor cells of B6 origin transformed by the human adenovirus type 5 early region 1 (Ad5E1) induces an H-2Db-restricted CTL response against an E1B-encoded CTL epitope. We now report that immunization of B6 mice with Ad5E1-transformed tumor cells of BALB/c origin (H-2d), apart from inducing a B6 anti-BALB/c allo-response, also induces a strong CTL response against the E1B-encoded H-2Db-presented CTL epitope. BALB/c Ad5E1-transformed tumor cells are not recognized by E1B-specific CTLs, indicating that nontumor cells have processed the E1B-encoded CTL antigen and have presented the E1B peptide to E1B-specific CTLs. These data also show that the B6 anti-BALB/c allo-response does not overwhelm the anti-E1B response induced by the allogeneic tumor cell vaccination. Moreover, B6 mice immunized with allogeneic BALB/c Ad5E1 cells are, in contrast to mice vaccinated with untransformed BALB/c cells, protected against a subsequent challenge with B6 Ad5E1-expressing tumor cells. These data show that immunization with completely allogeneic tumor cells can lead to protective syngeneic antitumor immunity, indicating that completely allogeneic tumor cell vaccines can be used for the induction of antitumor immunity.


Assuntos
Imunização , Neoplasias Experimentais/imunologia , Animais , Células Cultivadas , Citotoxicidade Imunológica , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Linfócitos T Citotóxicos/imunologia
14.
Exp Hematol ; 28(6): 626-34, 2000 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-10880748

RESUMO

The response of mast cells (MC) to non-IgE-mediated stimulation is critically dependent on the population of MC examined. The neuropeptide Substance P (SP) has been reported to activate connective tissue-type MC (CTMC), while mucosal MC (MMC) are not activated by SP. We examined the effect of stem cell factor (SCF) plus interleukin-4 (IL-4) on SP-initiated activation of bone marrow-derived MC (BMMC). Mouse MC, derived from a culture of BM cells with IL-3, were subsequently treated with recombinant SCF plus IL-4 for 6 days. Responsiveness to SP was monitored measuring beta-hexosaminidase and lipid mediator release. Histochemical staining, histamine analysis, and granule protease expression were achieved to characterize the cells. In contrast to IL-3 grown cells, SCF/IL-4-exposed cells showed functional responsiveness to release beta-hexosaminidase (42.25% +/- 1.46% at SP concentration of 100 microM) and produce leukotriene C(4) (LTC(4)) (7.4 +/- 1.5 ng/10(6) cells)/prostaglandin D(2) (PGD(2)) (2.0 +/- 0.3 ng/10(6) cells) upon stimulation by SP. The increase in sensitivity of the cells to SP was not due to differentiation into CTMC, as the cells remained heparin negative. Both SCF and IL-4 were needed because SCF or IL-4 alone were insufficient to keep cells viable after 3 to 4 days post coculture. SP-induced secretion from BMMC cultured in medium containing SCF plus IL-4 (25.76% +/- 1.83%) was higher in comparison with cells cultured with SCF plus IL-3 (8.85% +/- 0.68%).These findings indicate that temporal changes in cytokine expression can influence the sensitivity of MC to non-immunologic stimuli. Local cytokine production leading to an increase in MC responsiveness to SP and inducing secretion of granule content and lipid generation may, therefore, propagate and worsen inflammatory conditions.


Assuntos
Interleucina-4/farmacologia , Leucotrieno C4/biossíntese , Mastócitos/efeitos dos fármacos , Prostaglandina D2/biossíntese , Fator de Células-Tronco/farmacologia , Substância P/farmacologia , Animais , Células da Medula Óssea/efeitos dos fármacos , Células Cultivadas , Grânulos Citoplasmáticos/metabolismo , Sinergismo Farmacológico , Histamina/biossíntese , Interleucina-3/farmacologia , Mastócitos/metabolismo , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Mutantes , Proteínas Quimioatraentes de Monócitos/biossíntese , RNA Mensageiro/biossíntese , Proteínas Recombinantes/farmacologia , Reação em Cadeia da Polimerase Via Transcriptase Reversa , beta-N-Acetil-Hexosaminidases/biossíntese
15.
J Immunol Methods ; 163(1): 23-32, 1993 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-8393053

RESUMO

Cytotoxic T lymphocytes (CTL) can be very effective mediators of tumor-specific immunity in vivo. Since little is known about the in vivo behaviour of cultured tumor-specific CTL, a fast and simple method has been developed utilizing a lipophilic carbocyanine, 1,1'-dioctadecyl 3,3,3',3'-tetramethylin-docarbocyanine perchlorate (DiI), for the in vivo detection of tumor-specific CTL clones in (tumor-bearing) mice. The two CTL clones used in this study are directed against human papillomavirus type 16- or human adenovirus type 5 early region 1 (Ad5E1)-transformed mouse embryo cells. Growth ability, cytotoxic capacity and tumor-eradicating potential remained unaltered when the CTL were labeled with this dye. Thus, in neither in vitro nor in vivo testing was the biological function of the CTL clones affected. The in vivo localization in the spleen of an adoptively transferred DiI-labeled Ad5E1-specific CTL clone is described. This adoptively transferred CTL clone was also detectable at the site of a subcutaneously growing human Ad5E1-induced tumor within 1 day after intravenous injection.


Assuntos
Carbocianinas , Linfócitos do Interstício Tumoral/patologia , Linfócitos T Citotóxicos/patologia , Infecções por Adenovirus Humanos/patologia , Marcadores de Afinidade , Animais , Células Clonais , Citotoxicidade Imunológica/imunologia , Corantes Fluorescentes , Imunoterapia Adotiva , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Nus , Papillomaviridae/imunologia , Células Tumorais Cultivadas , Infecções Tumorais por Vírus/patologia
16.
Int J Gynecol Cancer ; 9(1): 37-43, 1999 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11240741

RESUMO

Eleven patients with uterine adenosarcoma diagnosed between 1970 and 1995 were evaluated according to DNA ploidy, S-phase fraction, p53 and mdm-2 expression, and traditional clinical and pathological prognostic factors, such as tumor stage, grade and mitotic index. DNA flow cytometric analysis and immunohistochemical staining for p53 and mdm-2 were performed on paraffin-embedded archival tissue from the uterine tumors. The patients ranged in age from 41 to 90 years (median, 76 years). Only one patient was premenopausal at the time of diagnosis and five (45%) were nulliparous. One patient had received previous pelvic irradiation for anal squamous carcinoma. Six of the tumors (55%) were pure adenosarcoma and five (45%) were adenosarcoma with sarcomatous overgrowth. Nine patients had a stage I tumor and two had a stage II tumor. Among the six adenosarcomas we found three DNA diploid tumors, two DNA aneuploid tumors, and one DNA multiploid tumor. All adenosarcomas had an S-phase fraction less than 10%, except one that was not assessable. None was p53 positive and only one overexpressed mdm-2. All five adenosarcomas with sarcomatous overgrowth were DNA aneuploid, three (60%) had an S-phase fraction > 10%, two (40%) were p53 positive, and one (20%) overexpressed mdm-2. Five of the eleven patients suffered recurrences, and three (60%) of these developed lung metastases. During the observation period four (36%) patients (2 adenosarcomas and 2 adenosarcoma with sarcomatous overgrowth) died of disease, three patients died of intercurrent disease without recurrence, and the remaining four are alive with no evidence of disease. The overall five-year survival rate for all stages was 69%; for patients with AS it was 80%, while for those with adenosarcoma with sarcomatous overgrowth it was 50%. There were no variables which correlated with survival. In conclusion, we found hat the typical adenosarcoma had a tendency to be of low stage, have a lower mitotic rate and an S-phase fraction <10%. On the other hand, adenosarcomas with sarcomatous overgrowth were of high grade, had a high mitotic rate, and were DNA aneuploid with an S-phase fraction >10%. None of the variables studied correlated with survival. Tumors that were p53-positive or overexpressed mdm-2 did not behave worse than their negative counterpart. All patients who recurred with distant metastases died of disease.

17.
Int J Gynecol Cancer ; 9(2): 98-104, 1999 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-11240749

RESUMO

Seventeen patients with endometrial stromal sarcoma (ESS) diagnosed between 1970 and 1996 were evaluated according to DNA ploidy, S-phase fraction (SPF), p53, and mdm-2 expression, as well as traditional clinical and pathologic prognostic factors, such as tumor stage, grade, and mitotic index. DNA flow cytometric analysis and immunohistochemical staining for p53 and mdm-2 were performed on paraffin-embedded archival tissue from the uterine tumors. Flow cytometric DNA histograms were obtained from 16 patients. The patients ranged in age from 41 to 78 years (median, 57 years). Seven (41%) patients were premenopausal. Thirteen low-grade ESS were DNA diploid and had a low SPF. Of these, two overexpressed p53, while only one was mdm-2 positive. Among the four high-grade ESS we found one (25%) DNA diploid tumor and three (75%) DNA aneuploid tumors. Two (50%) had an SPF greater than 10%, three (75%) were p53-positive, and two (50%) overexpressed mdm-2. During the observation period, nine (53%) patients (five with low-grade and four with high-grade tumors) died of disease. The 5-year survival rate for patients with low-grade ESS was 74%, while all four patients with high-grade ESS died of disease within 14 months of diagnosis. Using the log-rank test, we found a significant correlation between survival and tumor grade (P = 0.007), DNA ploidy (P = 0.026), SPF (P = 0.048), and FIGO surgical stage (P = 0.026). In conclusion, we found that tumor grade was a strong predictor of clinical outcome in ESS. In addition, a worse prognosis was found for those ESS patients with advanced disease, DNA aneuploidy, and a high SPF. There was no difference between the recurrent and nonrecurrent group of early stage (surgical stage I), low-grade ESS with regard to clinicopathological features, DNA ploidy, SPF, p53, and mdm-2 expression. All patients with high-grade ESS died of disease within 14 months of diagnosis. In contrast, only three of the 11 patients with early stage, low-grade ESS died of disease.

18.
Int J Gynaecol Obstet ; 27(3): 427-9, 1988 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-2904910

RESUMO

Abdominal pregnancies are a small fraction of ectopic pregnancies. They usually implant on the peritoneal surface after partial disruption of the initial implantation site in the tubes. The pelvic cavity is the preferential site, but they have been reported from all over the peritoneal cavity. In the present case the pregnancy was situated on the surface of the right liver lobe. Abdominal pregnancies usually present with acute hemoperitoneum and the pre-operative diagnosis is extremely difficult. The possible role of IUDs as an etiological factor is briefly discussed.


Assuntos
Hemoperitônio/diagnóstico , Gravidez Abdominal/diagnóstico , Adulto , Feminino , Hemoperitônio/etiologia , Humanos , Dispositivos Intrauterinos/efeitos adversos , Fígado , Gravidez , Gravidez Abdominal/complicações , Ruptura Espontânea
19.
Int J Gynaecol Obstet ; 28(3): 287-8, 1989 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-2564361

RESUMO

Women with uterine malformations frequently present with reproductive impairment. This case addresses the opposite problem, a woman with uterus didelphus who conceived with ease. Following three consecutive cesarean sections in the left uterine horn, she was offered sterilization for medical reasons, but refused on religious grounds. As a compromise, she accepted unilateral tubal closure in order to force future pregnancies to the right uterine horn. She has now had three pregnancies with two cesarean sections on that side.


Assuntos
Esterilização Tubária , Útero/anormalidades , Adulto , Cesárea , Feminino , Humanos , Gravidez
20.
Ned Tijdschr Geneeskd ; 141(8): 381-4, 1997 Feb 22.
Artigo em Holandês | MEDLINE | ID: mdl-9157298

RESUMO

OBJECTIVE: Evaluation of the additional effect of plasma exchange in treatment with steroids of severe myasthenia gravis. DESIGN: Retrospective study. SETTING: Department of Neurology, University Hospital of Groningen, the Netherlands. PATIENTS AND METHODS: The clinical course was analysed in 24 patients with a total of 28 plasma exchange treatments. Prednisone was introduced or its maintenance dose was increased in 19 cases. Another 13 patients with severe myasthenia gravis were included to study the effect of prednisone monotherapy. RESULTS: Of the patients treated with plasma exchange and steroids 71% improved within the first week of treatment as against only 15% of the patients treated with prednisone monotherapy. After two weeks of plasma exchange plus prednisone or prednisone monotherapy, 88% and 69%, respectively were ameliorated. None of the patients receiving plasma exchange deteriorated or experienced adverse effects or complications due to plasma exchange. Of the patients receiving prednisone monotherapy 31% deteriorated in the first week of treatment. CONCLUSION: Patients with severe myasthenia gravis may safely be treated with plasma exchange in combination with prednisone. In our patient group, a state of rapid aggravation was cut short more quickly by prednisone plus plasma exchange than by prednisone monotherapy.


Assuntos
Miastenia Gravis/terapia , Troca Plasmática , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Terapia Combinada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Miastenia Gravis/tratamento farmacológico , Prednisona/uso terapêutico , Estudos Retrospectivos , Resultado do Tratamento
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