RESUMO
PURPOSE: This study was aimed to investigate incidence, circumstances and consequences of acute compartment syndrome (CS) of the lower extremity after gynecological operations in lithotomy position by collecting data from departments of Obstetrics and Gynecology in Germany. DESIGN: Retrospective observational study. SETTING: Departments of Obstetrics and Gynecology in the area of North Rhine (Germany) METHODS: A 24-item questionnaire was sent to 168 gynecological departments. In addition, cases anonymously reported to the Expert Committee for Medical Malpractice Claims of the Medical Association of North Rhine between 2002 and 2012 were analyzed. MAIN OUTCOME MEASURE: Incidence of acute CS after gynecological operations. RESULTS: A total of 59 questionnaires (35 %) were returned for analysis, reporting 21 cases of CS. Based on the collected data, we calculated an incidence of postoperative CS ranging between 0.067 % and 0.28 %. All reported cases of postoperative CS occurred after surgeries in lithotomy position, 57.1 % of cases occurred after laparoscopic procedures and 76.2 % after procedures longer than 4 h. Overall, 61.0 % of departments do not routinely inform about the risk of this complication when they get patients' informed consent. Reported prevention strategies were inconsistent and ranged from none to multiple measures. CONCLUSION: CS is a complication clearly associated with long lasting gynecological operations in Lithotomy position. Despite a relatively high incidence, so far no guidelines on perioperative management and medicolegal aspects exist and preventive measures are heterogeneous among institutions. The need for guidelines and recommendations by an expert committee has been identified.
Assuntos
Síndromes Compartimentais/epidemiologia , Procedimentos Cirúrgicos em Ginecologia/efeitos adversos , Extremidade Inferior , Doença Aguda , Adulto , Idoso , Feminino , Alemanha , Humanos , Incidência , Laparoscopia/efeitos adversos , Pessoa de Meia-Idade , Duração da Cirurgia , Posicionamento do Paciente/efeitos adversos , Estudos Retrospectivos , Fatores de Risco , Adulto JovemRESUMO
Early molecular interaction between embryo and mother, involving chemoattractants, especially chemokine CXC-motif ligand 1 (CXCL1)(2), determines the pregnancy outcome. So far nothing is known about the signalling cascades of CXCL1 expression in human decidua. The aim of the study was to identify signalling cascades mediating the CXCL1 expression in human decidua incubated with IL-1ß as a major secretion product of the embryo. Therefore, decidualised endometrial stromal cells were incubated with IL-1ß in a concentration- and time-dependent manner. The specificity of the IL-1ß induced CXCL1 expression was verified by application of the IL-1 receptor antagonist, which opposed the binding of IL-1ß to its receptor, leading to a dose dependent diminished to complete CXCL1 elimination. IL-1ß signalling was investigated using inhibitors for MAPK, STAT3 and JNKinase cascades. The CXCL1 secretion of decidualised endometrial cells was measured by ELISA. The MAPK signalling cascade was explored by western blot analysis of ERK and NFκB p65(3) as well as phospho ERK and pp65 activation by IL-1ß in detail. A statistical significant increase in CXCL1 mRNA- and protein-expression after incubation with 0.1ng/ml IL-1ß after 48h was detected. CXCL1 protein secretion could be completely prevented by IL-1 receptor antagonist treatment. Only inhibition of the MAPKinase pathway resulted in a statistically significant decrease of CXCL1 protein secretion. Initiation of the MAPK pathway depicted by phospho ERK activation started as early as 2min after coincubation of decidualised endometrial stromal cells with IL-1ß. Activation of NFκB p65 could be measured within 15min of IL-1ß incubation in decidualised endometrial stromal cells. CXCL1 is a target for the embryos' secretion product IL-1ß in decidualised endometrial stromal cells during the peri-implantation period. IL-1ß's rapid effect on CXCL1 synthesis is uniquely mediated via the MAPK-signalling cascade and the activation of CXCL1s' transcription factor NFκB p65.
Assuntos
Quimiocina CXCL1/metabolismo , Decídua/metabolismo , Interleucina-1beta/metabolismo , Sistema de Sinalização das MAP Quinases , Fator de Transcrição RelA/metabolismo , Quimiocina CXCL1/biossíntese , Quimiocina CXCL1/genética , Decídua/citologia , Feminino , Humanos , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Gravidez , Resultado da Gravidez , Ligação Proteica/efeitos dos fármacos , RNA Mensageiro/biossíntese , Receptores de Interleucina-1/antagonistas & inibidores , Fator de Transcrição STAT3/metabolismoRESUMO
BACKGROUND: Hormone Receptor (HR)-discordance between primary breast cancer and metastasis is a known biological phenomenon. Discordance studies usually comprise a heterogeneous group of HR-positive and negative patients and allow for the comparison of changes in HR-status from the primary to the recurrent disease. However, in a clinical setting, the rate of estrogen receptor-conversion following endocrine therapy with agents such as Tamoxifen (TAM) in estrogen receptor-positive cancers is of primary interest as opposed to total receptor discordance. AIM: To investigate the rate of estrogen receptor-conversion associated with tumor progression in estrogen receptor-positive breast cancer patients following adjuvant TAM administration and to compare the results with the meta-analysis data of HR-discordance studies. METHODS AND RESULTS: A retrospective double-center review of biomarkers in 67 estrogen receptor-positive breast cancer patients who underwent TAM treatment in the adjuvant setting. The estrogen and progesterone receptor-status were compared at the time of diagnosis and following relapse and the Disease-free Survival, mean duration of TAM treatment as well as the operative, radiation, and cytotoxic therapies registered before TAM treatment, were recorded. Initially, all patients were estrogen receptor-positive. The average age at the time of diagnosis was 52.8 ± 12.4 years. After recurrence, only 47 patients (70.1%) were still estrogen receptor-positive with a highly significant loss of estrogen receptor-expression in 29.9% of cases. The mean duration of TAM treatment was 40.7 ± 19.9 months. 45 patients (i.e., 67.2%) progressed during the TAM treatment and the remaining 22 patients (32.8%) developed relapse after the TAM treatment had finished. Initially, there were 82.1% progesterone receptor-positive and 17.9% progesterone receptor-negative, but after relapse the progesterone receptor-positive cases diminished significantly to 53.7%, showing a progesterone receptor-loss of 28.4%. CONCLUSION: The rate of estrogen receptor-loss associated with tumor progression following TAM treatment is approximately 30%, which is of clinical relevance in order to evaluate further endocrine efficacy in these patients. This rate of receptor conversion is roughly 6-13% higher compared to the recently published meta-analysis data of discordance studies. This discrepancy could possibly be due to anti-hormonal therapy with TAM accentuating receptor conversion.
Assuntos
Neoplasias da Mama/tratamento farmacológico , Moduladores Seletivos de Receptor Estrogênico/farmacologia , Tamoxifeno/farmacologia , Adulto , Biomarcadores Tumorais/análise , Neoplasias da Mama/patologia , Quimioterapia Adjuvante , Intervalo Livre de Doença , Feminino , Expressão Gênica/efeitos dos fármacos , Humanos , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/tratamento farmacológico , Estudos Retrospectivos , Moduladores Seletivos de Receptor Estrogênico/administração & dosagem , Tamoxifeno/administração & dosagemRESUMO
OBJECTIVE: Multidrug resistance gene 1 (MDR1) mediated resistance to chemotherapeutic agents is a major obstacle for the therapy of various cancer types. The use of conditionally replicating adenoviruses (CRAds) is dependent on molecular differences between tumor cells and non tumor cells. Transcriptional targeting of CRAd replication is an effective way to control replication regulation. The aim of this study was to evaluate the effect of a MDR1 targeted fiber-modified CRAd against chemotherapy resistant ovarian cancer. METHODS: MDR1 expression was evaluated in chemotherapy naïve and pretreated ovarian cancer cells and various control cells. We constructed 2 variants of a fiber-modified CRAd, Ad5/3MDR1E1 and Ad5/3MDR1E1∆24 containing the MDR1 promoter to control viral replication via the E1A gene. The MDR promoter activity and cell killing efficacy were evaluated in vitro. Orthotopic murine models of peritoneally disseminated ovarian cancer were utilized to evaluate the preclinical efficacy of MDR targeted CRAds in vivo. To evaluate the liver toxicity of MDR1 targeted CRAds, we compared Ad5/3MDR1E1 with Ad5/3∆24, a CRAd that replicates in cancer cells inactive in the Rb/p16 pathway by use of an in vivo hepatotoxicity model. RESULTS: We demonstrate efficient oncolysis of Ad5/3MDR1E1 in both chemotherapy resistant ovarian cancer cell lines and in primary tumor cells from pretreated patients as well as therapeutic efficacy in an orthotopic mouse model. Ad5/3MDR1E1 demonstrated significantly decreased liver toxicity compared to other 5/3-fiber modified control vectors examined. CONCLUSIONS: In summary, Ad5/3MDR1E1 is an efficient and safe gene therapy approach for specific targeting of chemotherapy resistant cancer cells.
Assuntos
Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Terapia Viral Oncolítica/métodos , Vírus Oncolíticos/fisiologia , Neoplasias Ovarianas/terapia , Subfamília B de Transportador de Cassetes de Ligação de ATP , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/biossíntese , Adenoviridae/genética , Adenoviridae/fisiologia , Animais , Neoplasias da Mama/metabolismo , Neoplasias da Mama/terapia , Neoplasias da Mama/virologia , Linhagem Celular Tumoral , Resistencia a Medicamentos Antineoplásicos , Feminino , Técnicas de Transferência de Genes , Humanos , Fígado/virologia , Camundongos , Camundongos Endogâmicos C57BL , Terapia Viral Oncolítica/efeitos adversos , Vírus Oncolíticos/genética , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/virologia , Regiões Promotoras Genéticas , Replicação ViralRESUMO
STUDY OBJECTIVE: The aim of this study was to estimate the benefit of excision of the endocervix during laparoscopic supracervical hysterectomy (LSH) with regard to postoperative cyclical bleeding. DESIGN: Cohort study from 2 centers (Canadian Task Force classification II-2). SETTING: Two surgical teams at the University of Duesseldorf Medical Center and PAN Clinic, Cologne, Germany. PATIENTS: Women with menstrual bleeding disorders resistant to medical treatment, symptomatic leiomyomata, dysmenorrhea. INTERVENTION: Laparoscopic supracervical hysterectomy. The uterus was transsected from the cervix with 2 techniques with and without excision of cervical canal. MEASUREMENTS AND MAIN RESULTS: We evaluated 300 patients who underwent consecutive LSH procedures. In 150 patients the uterus was transsected from the cervix using a monopolar loop. In a second series of 150 patients a unipolar needle electrode was used for the uterine amputation and the excision of cervical canal. The mean duration of the transsection was 65 seconds (monopolar loop) versus 168 seconds (monopolar needle). The excision of the endocervix was performed without any complications in 148 procedures. Histologic examination of the removed tissue revealed endocervical tissue in 83.3% (n = 125), endometrium in 9.4% (n = 14), cervicoisthmic mucosa in 3.3% (n = 5), and myometrium only in 4% (n = 4). All 300 patients were contacted 12 months after surgery to inquire about bleeding status, and 282 (94%) responded. In patients who underwent excision of the endocervix, postoperative cyclical bleeding was significantly reduced compared with the control group (1.4% vs 10.7%). CONCLUSION: The results of this study indicate that the routine excision of the endocervix is a quick safe procedure which allows a significant reduction of postoperative cyclical bleeding in patients who undergo LSH.
Assuntos
Histerectomia/efeitos adversos , Laparoscopia/métodos , Distúrbios Menstruais/etiologia , Metrorragia/etiologia , Adulto , Feminino , Humanos , Histerectomia/métodos , Pessoa de Meia-Idade , Resultado do TratamentoRESUMO
STUDY OBJECTIVE: The aim of this study was to estimate the rate of intrauterine adhesions and subsequent pregnancy outcome in patients with residual trophoblastic tissue treated with hysteroscopic resection versus ultrasound-guided dilation and evacuation (D&E). DESIGN: Cohort study from 2 centers (Canadian Task Force classification II-2). SETTING: Two surgical teams at the University of Duesseldorf Medical Center and the PAN Clinic in Cologne, Germany. PATIENTS: Women with residual trophoblastic tissue after first- or second-trimester miscarriage or term delivery. INTERVENTION: Two techniques were used for the removal of residual trophoblastic tissue: ultrasound-guided evacuation with a curette (D&E) and hysteroscopic resection of trophoblastic tissue (HR). MEASUREMENTS AND MAIN RESULTS: We evaluated 95 patients who underwent secondary intervention for residual trophoblastic disease. A total of 42 patients underwent dilation of the cervix and ultrasound-guided curettage. In a second series of 53 patients, a resectoscope fitted with a 4-mm cutting loop was used for the removal of residual trophoblastic tissue used without application of current. Three months after the intervention, second-look office hysteroscopy was performed. Differences between both treatment groups were statistically significant. After HR, mild intrauterine adhesions were found in 2 patients (4.2%). After D&E, 12 patients (30.8%) presented with intrauterine adhesions (mild intrauterine adhesions: n = 7 [17.9%]; single dense adhesions: n = 3 [7.7%]; and extensive endometrial fibrosis n = 1 [2.6%]). Eighty-two patients wanted to become pregnant. Conception rate of all patients examined was 68.8% (HR) and 59.9% (D&E) (p < .05). In patients younger than 35 years of age who underwent HR, the pregnancy rate was significantly (p < .05) increased compared with patients who underwent D&E (78.1% vs 66.6%). In addition, patients from the HR group demonstrated a significantly (p < .05) shorter time to conception (11.5 month vs 14.5 month). CONCLUSION: The results of this study indicate that selective HR of residual trophoblastic tissue significantly reduces the incidence of intrauterine adhesions and increases pregnancy rates.
Assuntos
Curetagem/efeitos adversos , Endométrio/cirurgia , Histeroscopia/efeitos adversos , Trofoblastos/patologia , Doenças Uterinas/cirurgia , Aborto Espontâneo/patologia , Aborto Espontâneo/cirurgia , Adulto , Estudos de Coortes , Curetagem/métodos , Endométrio/patologia , Feminino , Humanos , Histeroscopia/métodos , Gravidez , Resultado da Gravidez , Aderências Teciduais/etiologia , Aderências Teciduais/cirurgia , Resultado do Tratamento , Doenças Uterinas/patologiaRESUMO
PURPOSE: Recently, virotherapy has been proposed as a new therapeutic approach for ovarian cancer. Conditionally replicative adenoviruses (CRAd) may contain tumor-specific promoters that restrict virus replication to cancer cells. Mesothelin, a cell surface glycoprotein, is overexpressed in ovarian cancer but not in normal ovarian tissues. The purpose of this study was to explore the therapeutic utility of a mesothelin promoter-based CRAd in a murine model of ovarian cancer, using noninvasive in vivo imaging. EXPERIMENTAL DESIGN: We constructed a mesothelin promoter-based CRAd with a chimeric Ad5/3 fiber (AdMSLNCRAd5/3) that contains an Ad5 tail, Ad5 shaft, and an Ad3 knob. Previously, a chimeric Ad5/3 fiber has shown improved infectivity in many ovarian cancer cells. Viral replication and oncolysis were assessed in a panel of ovarian cancer cell lines. To test the oncolytic efficacy of AdMSLNCRAd5/3 in a murine model, bioluminescence imaging of tumor luciferase activity and survival analysis were done. RESULTS: AdMSLNCRAd5/3 achieved up to a 10,000-fold higher cell killing effect and up to 120-fold higher levels of viral replication in all human ovarian cancer cells, compared with wild-type Ad5. AdMSLNCRAd5/3 significantly inhibited tumor growth as confirmed by in vivo imaging (P < 0.05). Survival with AdMSLNCRAd5/3 was significantly enhanced when compared with no virus or with a wild-type Ad5-treated group (P < 0.05). CONCLUSIONS: The robust replication, oncolysis, and in vivo therapeutic efficacy of AdMSLNCRAd5/3 showed that this CRAd is a promising candidate for treating ovarian cancer. Importantly, we have applied in vivo imaging that has allowed repeated and longitudinal measurements of tumor growth after CRAd treatment.
Assuntos
Adenoviridae/genética , Glicoproteínas de Membrana/genética , Terapia Viral Oncolítica/métodos , Neoplasias Ovarianas/terapia , Regiões Promotoras Genéticas , Proteínas E1A de Adenovirus/genética , Animais , Feminino , Proteínas Ligadas por GPI , Vetores Genéticos , Humanos , Mesotelina , Camundongos , Camundongos SCID , Neoplasias Ovarianas/virologia , Reação em Cadeia da Polimerase , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
UNLABELLED: Endometrial carcinoma is the most common genital cancer in women. While patients usually present with vaginal bleeding, in 10-20% this characteristic symptom is absent. Endometrial thickness (double layer) is measured by transvaginal sonography and thickening indicates an increased risk of malignancy or other pathology (hyperplasia or polyps). OBJECTIVE: We sought to correlate hysteroscopic and pathological findings in asymptomatic postmenopausal women with sonographically thickened endometrium (>6mm). STUDY DESIGN: A prospective observational study in a university hospital of 304 postmenopausal women referred between 1996 and 2006 because of a sonographically thickened endometrium in the absence of abnormal bleeding, who underwent continuous flow hysteroscopy (4.5mm Storz hysteroscope) and fractionated curettage of the uterine cervix and corpus (D & C) in addition to vaginal sonography (5MHz probe). RESULTS: The mean age of the women was 64.8 (range 57.7-71.9) years. Average endometrial thickness measured by ultrasound was 12mm+/-6.7mm. Hysteroscopy suggested the presence of endometrial polyps in 226 women (74.3%), simple endometrial hyperplasia in 34 (11.2%), atrophic endometrium in 18 (5.9%), complex endometrial hyperplasia in 2 (0.7%), atypical hyperplasia in 3 (1%) and leiomyoma in 9 (3.0%). In 12 women (3.9%), the hysteroscopic appearance suggested malignancy and histology revealed endometrial adenocarcinoma. All hysteroscopic results were confirmed by histological examination. CONCLUSION: Hysteroscopy represents an easy, safe and effective method for the investigation of asymptomatic women with a thickened endometrium found with transvaginal ultrasound. The commonest pathology was endometrial polyps.
Assuntos
Hiperplasia Endometrial/diagnóstico , Neoplasias do Endométrio/diagnóstico , Histeroscopia , Neoplasias Uterinas/diagnóstico , Idoso , Atrofia/diagnóstico , Hiperplasia Endometrial/patologia , Endométrio/diagnóstico por imagem , Endométrio/patologia , Feminino , Humanos , Histeroscopia/métodos , Leiomioma/diagnóstico , Pessoa de Meia-Idade , Pólipos/diagnóstico , Pós-Menopausa , Estudos Prospectivos , Fatores de Risco , Ultrassonografia , Doenças Uterinas/diagnósticoRESUMO
OBJECTIVE: To characterize the changes in incidence, age of disease onset, tumor site and patients characteristics in women with invasive vulvar cancer in a German University Hospital unit over a 28-year period. METHODS: The clinical records for women treated for invasive vulvar cancer from 01/1980 until 06/2007 were analyzed. We performed a retrospective analysis for three 9-year periods: 1/1980 to 02/1989; 3/1989 to 04/1998 and 05/1998 to 06/2007. For each cohort, the number of cases treated, age of disease onset, tumor site and further characteristics were extracted and statistically evaluated. RESULTS: A total of 224 patients with vulvar cancer were identified between 1/1980 and 6/2007. The number and mean age changed significantly over time: between 1/1980 and 02/1989 53 women with a mean age of 65.6 years were treated for invasive vulvar cancer, between 03/1989 and 04/1998 this number increased to 69 women with a mean age of 63.9 years and in the last period, 102 women with a mean age of 57.0 years were treated for vulvar cancer. The total increase was 192%. In the first period 11% of the women were aged 50 years or less compared with over 41% in the third period (p=0.001). Two-third of the tumors women aged<50 years were HPV-positive. Significant changes in the tumor site were observed; from labial position to the region between clitoris and urethra: 37% in the last period compared with 19% in the first period (p>0.05). CONCLUSIONS: Although in the literature the incidence of invasive cancer has been reported to be stable or only minimally increased, the results of this study show that the number of patients presenting with invasive vulvar cancer has doubled within the last three decades at one university hospital unit in Germany, with a nearly 4-time increase in younger patients (+372%) due to HPV high risk infection. The tumor localization changed significantly from the labia to the area between the clitoris and urethra. Assuming that these limited data reflect the general trend in the incidence of HPV-induced vulvar cancer, widely-implemented prophylactic quadrivalent HPV vaccination, which has been proven to be highly effective against anogenital disease, could make an important contribution to the reduction of the risk of vulvar carcinomas in younger women.
Assuntos
Neoplasias Vulvares/epidemiologia , Neoplasias Vulvares/patologia , Adulto , Idade de Início , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Feminino , Alemanha/epidemiologia , Humanos , Incidência , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/epidemiologia , Estudos Retrospectivos , Neoplasias Vulvares/virologiaRESUMO
PURPOSE: Adenovirus serotype 5 (Ad5) has been used for gene therapy with limited success due to insufficient infectivity in cells with low expression of the primary receptor, the coxsackie and adenovirus receptor (CAR). Evidence that adenovirus serotype receptors other than CAR may be of use was presented in previous studies that showed that the Ad3 receptor is expressed at high levels in ovarian cancer cells. We hypothesized that combined use of unique chimeric fibers in the context of novel mosaic adenovirus vectors would enhance infectivity via non-CAR pathways in ovarian cancer cells. EXPERIMENTAL DESIGN: We constructed and characterized Ad5 vectors that use Ad3 knob and reovirus fibers to generate a mosaic fiber virion. Serotype 3 Dearing reovirus uses a fiber-like sigma 1 protein to infect cells expressing sialic acid and junction adhesion molecule 1. We therefore constructed a mosaic fiber Ad5 vector, designated Ad5/3-sigma 1, encoding two fibers: a sigma 1 chimeric fiber and the chimeric Ad5/3 fiber composed of an Ad3 knob. RESULTS: Functionally, Ad5/3-sigma 1 used sialic acid, junction adhesion molecule 1, and Ad3 receptor for cell transduction and achieved maximum infectivity enhancement in ovarian cancer cells with low CAR expression. Furthermore, Ad5/3-sigma 1 achieved infectivity enhancement in primary tissue slices of human ovarian tumor. CONCLUSIONS: We have developed a new type of Ad5 vector with the novel tropism, possessing fibers from Ad3 and reovirus, which exhibits enhanced infectivity via CAR-independent pathway(s). In addition, the flexible genetic platform of vector allows different combination of fiber variants that can be incorporated within the same particle.
Assuntos
Adenoviridae/genética , Terapia Genética/métodos , Vetores Genéticos/genética , Vetores Genéticos/metabolismo , Neoplasias Ovarianas/terapia , Receptores Virais/metabolismo , Proteínas do Capsídeo/genética , Linhagem Celular Tumoral , Proteína de Membrana Semelhante a Receptor de Coxsackie e Adenovirus , Feminino , Humanos , Ácido N-Acetilneuramínico/farmacologia , Neoplasias Ovarianas/química , Neoplasias Ovarianas/metabolismo , Receptores Virais/análise , Transdução Genética/métodosRESUMO
Gene therapy with adenoviral (Ad) vectors is a promising new approach in the treatment of cancer. Strategies to restrict adenoviral-mediated transgene expression are important to avoid gene transfer into normal cells. Heparanase (HPR) is overexpressed in breast cancer but downregulated in differentiated normal tissue. Expression of the HPR gene was evaluated in breast cancer cells. Biodistribution and liver tropism was evaluated in a mouse model. HPR is highly expressed in breast cancer tissue. The HPR promoter retained its fidelity in an adenovirus context and was activated in breast cancer cells but showed low activity in normal breast cells and the murine liver. We conclude that the HPR pathway is a promising target for the development of breast cancer directed gene therapy strategies.
Assuntos
Neoplasias da Mama/terapia , Terapia Genética , Glucuronidase/genética , Regiões Promotoras Genéticas/genética , Adenoviridae/genética , Adenoviridae/metabolismo , Animais , Neoplasias da Mama/enzimologia , Neoplasias da Mama/genética , Linhagem Celular Tumoral , Feminino , Genes Reporter , Vetores Genéticos , Glucuronidase/metabolismo , Humanos , Fígado/metabolismo , Luciferases , Camundongos , RNA Mensageiro/metabolismo , TransfecçãoRESUMO
OBJECT: Malignant brain tumors have been proved to be resistant to standard treatments and therefore require new therapeutic strategies. Survivin, a recently described member of the inhibitor of apoptosis protein family, is overexpressed in several human brain tumors, primarily gliomas, but is downregulated in normal tissues. The authors hypothesized that the expression of tumor-specific survivin could be exploited for treatment of gliomas by targeting the tumors with gene therapy vectors. METHODS: Following confirmation of survivin expression in glioma cell lines, an adenoviral vector containing the survivin promoter and the reporter gene luciferase was tested in established and primary glioma cells, normal astrocytic cells, and normal human brain tissues. High levels of reporter gene expression were observed in established tumor and primary tumor cell lines and low levels of expression in astrocytes and normal human brain tissue. To test oncolytic potency, the authors constructed survivin promoter-based conditionally replicative adenoviruses (CRAds), composed of survivin promoter-regulated E1 gene expression and an RGD-4C capsid modification. These CRAds could efficiently replicate within and kill a variety of established glioma tumor cells, but were inactive in a normal human liver organ culture. Finally, survivin promoter-based CRAds significantly inhibited the growth of glioma xenografts in vivo. CONCLUSIONS: Together these data indicate that the survivin promoter is a promising tumor-specific promoter for transcriptional targeting of adenovirus-based vectors and CRAds for malignant gliomas. The strategy of using survivin-CRAds may thus translate into an experimental therapeutic approach that can be used in human clinical trials.
Assuntos
Neoplasias Encefálicas/genética , Marcação de Genes , Terapia Genética/métodos , Glioma/genética , Regiões Promotoras Genéticas/genética , Transcrição Gênica/genética , Adenoviridae , Animais , Apoptose/genética , Linhagem Celular Tumoral , Feminino , Vetores Genéticos , Humanos , Proteínas Inibidoras de Apoptose , Masculino , Camundongos , Camundongos Endogâmicos C3H , Camundongos Endogâmicos C57BL , Camundongos Nus , Proteínas Associadas aos Microtúbulos/genética , Proteínas de Neoplasias/genética , Transplante de Neoplasias , Survivina , Transplante Heterólogo , Replicação Viral/genéticaRESUMO
PURPOSE: The use of conditionally replicating adenoviruses (CRAD) is dependent on molecular differences between tumor cells and nontumor cells. Transcriptional targeting of CRAD replication via tumor-specific promoters is an effective way to control replication regulation. Genetic fiber pseudotyping is an approach for circumventing low expression of the primary adenovirus serotype 5 (Ad5) receptor by using the distinct adenovirus serotype 3 (Ad3) receptor for entry into and subsequent killing of ovarian cancer cells. EXPERIMENTAL DESIGN: In this study, we constructed a fiber-modified CRAD containing the secretory leukoprotease inhibitor (SLPI) promoter to control viral replication via the E1A gene (Ad5/3SLPI). To evaluate the liver toxicity of chimeric 5/3 fiber-modified CRADs, we compared Ad5/3SLPI with Ad5/3Cox-2L, a CRAD with E1A under control of the Cox-2 promoter, and Ad5/3Delta24, a CRAD that replicates in cancer cells inactive in the retinoblastoma/p16 pathway by use of an in vivo hepatotoxicity model and by a model system that uses slices of human liver. RESULTS: We show efficient viral replication and oncolysis of Ad5/3SLPI in both multiple ovarian cancer cell lines and primary tumor cell spheroids as well as therapeutic efficacy in an orthotopic mouse model of peritoneal carcinomatosis. Ad5/3SLPI showed significantly decreased liver toxicity compared with other 5/3 fiber-modified control vectors examined. CONCLUSIONS: In summary, Ad5/3SLPI is a promising vector candidate for treating metastatic ovarian cancer and showed robust virus replication, oncolysis, and in vivo therapeutic efficacy. Ad5/3SLPI showed comparatively low liver toxicity and therefore holds potential for patient use in the clinic.
Assuntos
Adenoviridae/genética , Proteínas do Capsídeo/genética , Neoplasias Ovarianas/virologia , Regiões Promotoras Genéticas/genética , Proteínas/genética , Adenoviridae/crescimento & desenvolvimento , Proteínas E1A de Adenovirus/genética , Animais , Linhagem Celular Tumoral , Proliferação de Células , Feminino , Vetores Genéticos/administração & dosagem , Vetores Genéticos/genética , Humanos , Técnicas In Vitro , Fígado/metabolismo , Fígado/patologia , Fígado/virologia , Camundongos , Camundongos Endogâmicos C57BL , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/terapia , Proteínas Secretadas Inibidoras de Proteinases , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Inibidor Secretado de Peptidases Leucocitárias , Esferoides Celulares/patologia , Esferoides Celulares/virologia , Análise de Sobrevida , Replicação Viral , Ensaios Antitumorais Modelo de Xenoenxerto/métodosRESUMO
PURPOSE: Current animal tumor models are inadequate for the evaluation of toxicity and efficacy of conditionally replicative adenoviruses. A novel model system is needed that will provide insight into the anticipated therapeutic index of conditionally replicative adenoviruses preclinically. We endeavored to show a novel model system, which involves ex vivo evaluation of conditionally replicative adenovirus toxicity and therapeutic efficacy in thin, precision-cut slices of human primary tumor and liver. EXPERIMENTAL DESIGN: The Krumdieck thin-slice tissue culture system was used to obtain and culture slices of tumor xenografts of ovarian cancer cell lines, human primary ovarian tumors, and human liver. We determined the viability of slices in culture over a period of 36 to 48 hours by ([3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxphenyl-2-(4-sulfophenyl)-2H-tetrazolium, inner salt)]) (MTS) assay. In vitro Hey cells, slices of Hey xenografts, and human ovarian tumor or human liver slices were infected with 500vp/cell of either replication competent wild-type adenovirus (Ad5/3wt), conditionally replicative adenovirus (Ad5/3cox-2), or the replication deficient adenovirus (Ad5/3luc1). At 12-, 24-, and 36-hour intervals, the replication of adenoviruses in these slices was determined by quantitative reverse transcription-PCR of adenoviral E4 copy number. RESULTS: Primary tumor slices were able to maintain viability for up to 48 hours after infection with nonreplicative virus (Ad5luc1). Infection of Hey xenografts with Ad5/3cox-2 showed replication consistent with that seen in Hey cells infected in an in vitro setting. Primary tumor slices showed replication of both Ad5/3wt and Ad5/3cox over a 36-hour time period. Human liver slices showed replication of Ad5/3wt but a relative reduction in replication of Ad5/3cox-2 indicative of conditional replication "liver off" phenotype, thus predicting lower toxicity. CONCLUSIONS: The thin-slice model system represents a stringent method of ex vivo evaluation of novel replicative adenoviral vectors and allows assessment of human liver replication relative to human tumor replication. This is the first study to incorporate this system for evaluation of therapeutic efficacy and replicative specificity of conditionally replicative adenoviruses. Also, the study is the first to provide a valid means for preclinical assay of potential conditionally replicative adenovirus-based hepatotoxicities, thus providing a powerful tool to determine therapeutic index for clinical translation of conditionally replicative adenoviruses.
Assuntos
Adenoviridae/fisiologia , Modelos Animais , Neoplasias Ovarianas/terapia , Replicação Viral , Adenoviridae/patogenicidade , Infecções por Adenoviridae/genética , Infecções por Adenoviridae/terapia , Infecções por Adenoviridae/virologia , Animais , Sobrevivência Celular , Ciclo-Oxigenase 2 , DNA Viral/genética , Feminino , Humanos , Fígado/virologia , Regeneração Hepática , Proteínas de Membrana , Camundongos , Camundongos Nus , Neoplasias Epiteliais e Glandulares/genética , Neoplasias Epiteliais e Glandulares/terapia , Neoplasias Epiteliais e Glandulares/virologia , Técnicas de Cultura de Órgãos , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/virologia , Regiões Promotoras Genéticas , Prostaglandina-Endoperóxido Sintases/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Transplante HeterólogoRESUMO
Approaches to alter the native tropism of adenoviruses (Ads) are beneficial to increase their efficacy and safety profile. Liver tropism is important with regard to potential clinical toxicity in humans. Ad5/3 chimeras in which the Ad5 knob is substituted by the Ad3 knob, such as Ad5/3luc1, have been recently shown to increase infectivity of ovarian cancer cell lines and primary tumor cells, which express low levels of the coxsackie-adenovirus receptor (CAR), without increasing infectivity of liver cells. A novel strategy to address the problem of liver uptake and improve the tumor/liver ratio is genetic replacement of the Ad fiber shaft. Ad5.Ad3.SH.luc1 is an Ad5-based vector that contains the fiber shaft from Ad serotype 3 but the fiber knob from Ad serotype 5. To compare tumor/liver of Ad5.Ad3.SH.luc1 and Ad5/3luc1 in vivo, we created three different tumor and treatment models of ovarian cancer in mice, simulating intraperitoneal and intravenous administration of tumors. Ad5.Ad3.SH.luc1 displayed the lowest liver tropism of all viruses in all models tested. Intravenous administration of all viruses resulted in higher tumor transduction rates compared to intraperitoneal administration. Genetic shortening of the Ad5 fiber shaft significantly increases relative tumor/liver gene transfer. This could improve the effective tumor dose and reduce side effects, thereby increasing the bioavailability of therapeutic agents.
Assuntos
Adenovírus Humanos/genética , Técnicas de Transferência de Genes , Fígado/metabolismo , Neoplasias Ovarianas/terapia , Animais , Linhagem Celular Tumoral , Células Epiteliais/metabolismo , Feminino , Terapia Genética , Vetores Genéticos , Humanos , Injeções Intraperitoneais , Injeções Intravenosas , Injeções Subcutâneas , Luciferases/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Nus , Transplante de Neoplasias , Especificidade de Órgãos , Proteínas Recombinantes/metabolismo , Recombinação Genética , Sorotipagem , Transdução Genética , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
We sought to determine whether cytokine expression in peripheral blood mononuclear cells is altered in patients with preeclampsia and in patients with a history of recurrent spontaneous abortion (RSA). Twenty-four patients with preeclampsia and twenty patients with a history of RSA were included into the study. Two control groups consisted of twenty healthy pregnant and twenty healthy non-pregnant women. The intracellular expression of interleukin-2 (IL-2), interleukin-4 (IL-4) and interferon-gamma (IFN-gamma) were determined in peripheral blood mononuclear cells (PBMCs) by flow cytometry as a measure of cytokine production. IL-2 synthesis was significantly elevated in the third trimester in preeclamptic patients in comparison with the control group. Non-pregnant women with RSA showed a significantly lower expression of IFN-gamma compared to the non-pregnant control group. Our data suggest an abnormal immune response in preeclamptic patients characterised by a shift to a predominantly Th1-type immunity.
Assuntos
Citocinas/biossíntese , Pré-Eclâmpsia/imunologia , Células Th1/imunologia , Células Th2/imunologia , Adulto , Feminino , Humanos , GravidezRESUMO
This retrospective study was designed to evaluate the prognostic value of immunohistochemically detected nm23-expression in invasive breast cancer. Cellular expression of nm23 was assessed in 325 primary breast cancer tissues by immunohistochemistry. The data were correlated to established functional factors of prognosis (age, tumor size, nodal status, tumor grade, steroid hormone receptor status), and to clinical follow-up (median observation time, 92 months). 215/325 (66.2%) tumor tissues were considered nm23 positive. nm23 expression did not correlate to any of the investigated markers. Similar results were obtained after subdivision of the patients into node-negative patients (n=153) and node-positive cases (n=172). With respect to clinical outcome, nm23 expression displayed no statistical significance to predict the clinical course. In conclusion, the determination of nm23 expression is an independent factor but lacks prognostic or predictive value in breast cancer patients.
Assuntos
Adenocarcinoma Mucinoso/metabolismo , Biomarcadores Tumorais/metabolismo , Neoplasias da Mama/metabolismo , Carcinoma Ductal de Mama/metabolismo , Carcinoma Lobular/metabolismo , Proteínas Monoméricas de Ligação ao GTP/metabolismo , Núcleosídeo-Difosfato Quinase , Fatores de Transcrição/metabolismo , Adenocarcinoma Mucinoso/patologia , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/patologia , Carcinoma Lobular/patologia , Feminino , Expressão Gênica , Humanos , Técnicas Imunoenzimáticas , Linfonodos/patologia , Pessoa de Meia-Idade , Nucleosídeo NM23 Difosfato Quinases , Invasividade Neoplásica/patologia , Estadiamento de Neoplasias , Prognóstico , Estudos RetrospectivosRESUMO
Ovarian cancer patients often suffer from malignant ascites and pleural effusion. Apart from worsening the outcome, this condition frequently impairs the quality of life in patients who are already distressed by ovarian cancer. This study investigated whether single intraperitoneal administration of the anti-VEGF antibody bevacizumab is capable of reducing the ascites-related body surface and prolonging survival. The study was performed in an orthotopic murine model of peritoneal disseminated platin-resistant ovarian cancer. Mice were treated with bevacizumab and/or paclitaxel or buffer (control). Reduction of body surface and increased survival rates were assessed as therapeutic success. Survival of mice in all treatment groups was significantly enhanced when compared to the non-treatment control group. The combination of paclitaxel plus bevacizumab significantly improved body surface as well as overall survival in comparison to a treatment with only one of the drugs. Treatment of malignant effusion with a single dose of bevacizumab as an intraperitoneal application, with or without cytostatic co-medication, may be a powerful alternative to systemic treatment.
RESUMO
PURPOSE: Targeted oncolytic adenoviruses capable of replication selectively in cancer cells are an appealing approach for the treatment of various cancer types refractory to conventional therapies. The aim of this study was to evaluate the effect of Ad5/3MDR1E1, a multidrug resistance gene 1 (MDR1)-targeted fiber-modified replication-competent adenovirus for the therapy of platinum-pretreated ovarian cancer in combination with cytostatic agents. METHODS: MDR1-specific tumor cell killing of Ad5/3MDR1E1 was systematically evaluated in chemotherapy naïve and pretreated ovarian cancer cells in vitro. Combinations of Ad5/3MDR1E1 and cytostatic agents were studied in vivo and in vitro. An in vivo hepatotoxicity model was used to evaluate liver toxicity. RESULTS: We demonstrate efficient oncolysis of Ad5/3MDR1E1 in chemotherapy-resistant ovarian cancer cells as well as therapeutic efficacy in an orthotopic mouse model. Further, combining Ad5/3MDR1E1 with paclitaxel resulted in greater therapeutic benefit than either agent alone. CONCLUSION: These preclinical data suggest that a fiber-modified adenovirus vector under the control of the MDR1 promoter represents a promising treatment strategy for platinum-pretreated ovarian cancer as a single agent or in combination with conventional anticancer drugs.
Assuntos
Terapia Viral Oncolítica/métodos , Vírus Oncolíticos/fisiologia , Neoplasias Ovarianas/terapia , Paclitaxel/farmacologia , Subfamília B de Transportador de Cassetes de Ligação de ATP , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Adenoviridae/genética , Adenoviridae/fisiologia , Animais , Antineoplásicos/farmacologia , Proteínas do Capsídeo/genética , Linhagem Celular , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/genética , Cisplatino/farmacologia , Terapia Combinada , Resistencia a Medicamentos Antineoplásicos , Feminino , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Vírus Oncolíticos/genética , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/virologia , Regiões Promotoras Genéticas/genética , Análise de Sobrevida , Resultado do Tratamento , Replicação Viral , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
OBJECTIVE: To evaluate a vascular endothelial growth factor (VEGF)-targeted gene therapy for the treatment of endometriosis. DESIGN: Analysis of the VEGF gene expression and promoter activity in ectopic and eutopic endometrium. Evaluation of the specific replication and cell-killing effect of a VEGF-targeted adenovirus (Ad5VEGFE1) in endometriotic cells. PATIENT(S): Four patients who underwent hysterectomy for benign disease, 30 women with moderate superficial, and 30 women with deep infiltrating endometriosis. INTERVENTION(S): Immunostaining and gene expression of VEGF was examined in eutopic endometrium, endometriotic lesions, and normal peritoneum. The VEGF promoter activity was evaluated in eutopic endometrium and endometriotic lesions. A VEGF-targeted conditionally replicative adenovirus (Ad5VEGFE1) was evaluated regarding specific viral replication in endometriosis cells and induction of apoptosis. The biodistribution of the VEGF-targeted conditionally replicative adenovirus was examined in a mouse model. RESULT(S): The VEGF gene was highly expressed in ectopic endometrium compared with eutopic endometrium and normal peritoneum. The VEGF promoter was active in endometriotic cells. Ad5VEGFE1 showed efficient viral replication and induction of apoptosis in purified primary endometriotic cells and demonstrated a similar lower targeting to the liver and the uterus in a mouse model. CONCLUSION(S): Ad5VEGFE1 is a promising candidate for treating endometriosis and holds potential for clinical testing.