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1.
Nervenarzt ; 88(1): 26-33, 2017 Jan.
Artigo em Alemão | MEDLINE | ID: mdl-27853854

RESUMO

With each additional accumulative exposure to severe and traumatic stressors, the likelihood of developing mental health problems and physical diseases increases. Displaced individuals have usually experienced a number of serious threats to health due to organized violence in their home country or attacks during the flight. Frequently, domestic violence adds additional strain to the stressors experienced. The resulting impairments in psychosocial functioning reduce the resources needed for social adjustment and integration. Social exclusion then in turn often further aggravates the existing mental health complications. For the treatment of trauma spectrum disorders, different evidence-based psychotherapies are available. In high-income countries, trained and licensed psychotherapists are typically in positions to apply such interventions; however, even an advanced system with a high capacity, such as the psychotherapeutic care offered in Germany, severely struggles to manage the demands associated with the rapid addition of hundreds of thousands of displaced people. Germany's mental healthcare system at present lacks the resources, both human and technological, to effectively manage the present demands. Systematic scientific studies in resource-poor regions of war and conflict have demonstrated that the dissemination of effective treatment to local personnel, even with limited training, results in substantial improvements in the mental health challenges within the community: Organized as a cascade model, members of the refugee community learn to identify weakened fellow citizens requiring in-depth diagnostic interviews. Educated, bilingual individuals acquainted with their country's healthcare system (e. g. nurses, teachers and social workers) receive training to conduct structured interviews and evidence-based interventions under the supervision of centrally organized licensed psychotherapists. More complex cases are referred to local psychotherapists, psychiatrists or specialized treatment centers. These humanitarian efforts are based on the convention for the protection of human rights and secure the safety, freedom and dignity of these persons.


Assuntos
Programas de Rastreamento/métodos , Educação de Pacientes como Assunto/métodos , Psicoterapia/educação , Refugiados/psicologia , Apoio Social , Transtornos de Estresse Traumático/terapia , Barreiras de Comunicação , Humanos , Disseminação de Informação/métodos , Psicoterapia/métodos , Transtornos de Estresse Traumático/diagnóstico , Transtornos de Estresse Traumático/psicologia , Resultado do Tratamento , Guerra
3.
World J Surg ; 37(3): 591-6, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23203774

RESUMO

BACKGROUND: Hemorrhage caused by inflammatory vessel erosion represents a life-threatening complication after upper abdominal surgery such as pancreatic head resection. The gold standard therapeutic choice is an endovascular minimally invasive technique such as embolization or stent placement. Hepatic arterial hemorrhage in presence of pancreatitis and peritonitis is a particular challenge is if a standard therapeutic option is not possible. METHODS: The management of five patients with massive bleeding from the common hepatic artery is described. All patients underwent a splenic artery switch. The splenic artery was dissected close to the splenic hilum and transposed end-to-end to the common hepatic artery after resection of the eroded part. Patients' medical records, radiology reports, and images were reviewed retrospectively. Technical success was defined as immediate cessation of hemorrhage and preserved liver vascularization. Clinical success was defined as hemodynamic stability and adequate long-term liver function. RESULTS: Total pancreatectomy and splenectomy were performed in four of the five cases. Hemodynamic stability and good liver perfusion was achieved in these patients. CONCLUSIONS: Splenic artery switch is an effective, safe procedure for revascularization of the liver in case of hepatic arterial hemorrhage following pancreatic surgery, pancreatitis, and/or peritonitis. The technique is a promising option if a standard procedure-e.g., stent implantation, embolization and surgical repair with alloplastic prosthesis or autologous venous interposition graft-is not possible.


Assuntos
Hemostasia Cirúrgica/métodos , Fígado/irrigação sanguínea , Hemorragia Pós-Operatória/mortalidade , Hemorragia Pós-Operatória/cirurgia , Terapia de Salvação , Artéria Esplênica/cirurgia , Idoso , Angiografia Digital/métodos , Arterite/complicações , Arterite/diagnóstico por imagem , Estudos de Coortes , Bases de Dados Factuais , Feminino , Seguimentos , Neoplasias Gastrointestinais/patologia , Neoplasias Gastrointestinais/cirurgia , Hemostasia Cirúrgica/mortalidade , Artéria Hepática , Humanos , Laparotomia/efeitos adversos , Laparotomia/métodos , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/patologia , Neoplasias Pancreáticas/cirurgia , Hemorragia Pós-Operatória/diagnóstico por imagem , Estudos Retrospectivos , Medição de Risco , Índice de Gravidade de Doença , Análise de Sobrevida , Fatores de Tempo , Resultado do Tratamento
4.
Rev Sci Instrum ; 94(4)2023 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38081283

RESUMO

We report on the development of a diagnostic to measure the time-resolved column density and Doppler temperature of atomic vapors produced by laser ablation. The diagnostic is based on the strong frequency dependence of the atomic susceptibility near an electronic transition in the interrogated atomic species. Interference on the face of a fast photodetector between the several frequency components present in a sinusoidally phase-modulated probe beam will produce a time signature uniquely determined by the column density of atoms in the probed atomic state and the Doppler temperature of the atomic vapor. With the extensive, high precision atomic spectroscopy data available in the literature, it is possible to model the vapor and extract the desired parameters through comparison of the model result with the experimental data.

5.
Strahlenther Onkol ; 188(9): 777-81, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22878547

RESUMO

BACKGROUND: An earlier published series of neoadjuvant radiochemotherapy (NRT-CHX) in locally advanced noninflammatory breast cancer (LABC) has now been updated with a follow-up of more than 15 years. Long-term outcome data and predictive factors for pathologic complete response (pCR) were analyzed. PATIENTS AND METHODS: During 1991-1998, 315 LABC patients (cT1-cT4/cN0-N1) were treated with NRT-CHX. Preoperative radiotherapy (RT) consisted of external beam radiation therapy (EBRT) of 50 Gy (5 × 2 Gy/week) to the breast and the supra-/infraclavicular lymph nodes combined with an electron boost in 214 cases afterwards or-in case of breast conservation-a 10-Gy interstitial boost with (192)Ir afterloading before EBRT. Chemotherapy was administered prior to RT in 192 patients, and concomitantly in 113; 10 patients received no chemotherapy. The update of all follow-up ended in November 2011. Age, tumor grade, nodal status, hormone receptor status, simultaneous vs. sequential CHX, and the time interval between end of RT and surgery were examined in multivariate terms with pCR and overall survival as end point. RESULTS: The total pCR rate after neoadjuvant RT-CHX reached 29.2%, with LABC breast conservation becoming possible in 50.8% of cases. In initially node-positive cases (cN+), a complete nodal response (pN0) after NRT-CHX was observed in 56% (89/159). The multivariate analysis revealed that a longer time interval to surgery increased the probability for a pCR (HR 1.17 [95% CI 1.05-1.31], p < 0.01). However, in large tumors (T3-T4) a significantly reduced pCR rate (HR 0.89 [95% CI 0.80-0.99], p = 0.03) was obtained. Importantly, pCR was the strongest prognostic factor for long-term survival (HR 0.28 [95% CI 0.19-0.56], p < 0.001). CONCLUSION: pCR identifies patients with a significantly better prognosis for long-term survival. However, a long time interval to surgery (> 2 months) increases the probability of pCR after NRT-CHX.


Assuntos
Neoplasias da Mama/mortalidade , Neoplasias da Mama/terapia , Quimiorradioterapia Adjuvante/mortalidade , Terapia Neoadjuvante/mortalidade , Adulto , Idoso , Neoplasias da Mama/patologia , Estudos de Coortes , Feminino , Alemanha/epidemiologia , Humanos , Mastite/mortalidade , Mastite/terapia , Pessoa de Meia-Idade , Análise Multivariada , Prevalência , Indução de Remissão , Fatores de Risco , Taxa de Sobrevida , Resultado do Tratamento
7.
Psychother Psychosom ; 80(6): 345-52, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21829046

RESUMO

BACKGROUND: The aim of the present randomized controlled trial was to compare the outcome of 2 active treatments for posttraumatic stress disorder (PTSD) as a consequence of war and torture: narrative exposure therapy (NET) and stress inoculation training (SIT). METHODS: Twenty-eight PTSD patients who had experienced war and torture, most of them asylum seekers, received 10 treatment sessions of either NET or SIT at the Outpatient Clinic for Refugees, University of Konstanz, Germany. Posttests were carried out 4 weeks after treatment, and follow-up tests were performed 6 months and 1 year after treatment. The main outcome measure was the PTSD severity score according to the Clinician-Administered PTSD Scale (CAPS) at each time point. RESULTS: A significant reduction in PTSD severity was found for NET, but not for SIT. A symptom reduction in the NET group occurred between pretest and the 6-month follow-up examination, the effect size being d = 1.42 (for SIT: d = 0.12), and between pretest and the 1-year follow-up, the effect size being d = 1.59 (for SIT: d = 0.19). The rates and scores of major depression and other comorbid disorders did not decrease significantly over time in either of the 2 treatment groups. CONCLUSIONS: The results indicate that exposure treatments like NET lead to a significant PTSD symptom reduction even in severely traumatized refugees and asylum seekers.


Assuntos
Terapia Implosiva/métodos , Refugiados/psicologia , Transtornos de Estresse Pós-Traumáticos/terapia , Tortura , Guerra , Comorbidade , Seguimentos , Alemanha , Humanos , Transtornos do Humor/diagnóstico , Transtornos do Humor/epidemiologia , Narração , Escalas de Graduação Psiquiátrica , Índice de Gravidade de Doença , Transtornos de Estresse Pós-Traumáticos/diagnóstico , Transtornos de Estresse Pós-Traumáticos/epidemiologia , Tortura/psicologia , Resultado do Tratamento
8.
Eur J Med Res ; 16(1): 29-33, 2011 Jan 27.
Artigo em Inglês | MEDLINE | ID: mdl-21345767

RESUMO

OBJECTIVE: Treatment options for patients with diffuse type gastric cancer (linitis plastica) are discussed controversial. It is sometimes discussed that these patients should be treated primarily in palliative intention conservative without resection. METHODS: In a single-center analysis, we investigated 120 patients with diffuse type gastric cancer. All patients underwent a total gastrectomy, 45 patients even a multivisceral resection because of infiltrating growth, or metastases. Serum tumor marker CEA, CA 72-4, and CA 19-9 were recorded in all patients before surgery. An immunocytochemical detection of free peritoneal tumor cells (FPTC) using Ber-EP4 antibody was correlated with tumor stage and survival. Median follow-up time was 38 months. RESULTS: Complete resection rate was 31% (n = 37). 61% (n = 73) of all patients had already distant metastases at the time of surgery, 80% of them peritoneal carcinomatosis. Median survival for the whole group was 8 months, after complete resection 17 months. Lavage cytology, distant metastases, resection rate, and CA19-9 levels had significant influence on survival. CONCLUSION: A significant survival advantage for patients with diffuse type gastric cancer can only be achived after complete resection. We could define a subset of patients with an extremely poor prognosis even after surgical resection. Meticulous preoperative staging, including a diagnostic laparoscopy to exclude peritoneal carcinomatosis and free peritoneal tumor cells before resection should be mandatory in these patients.


Assuntos
Linite Plástica/cirurgia , Neoplasias Gástricas/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Líquido Ascítico/patologia , Antígeno CA-19-9/metabolismo , Feminino , Humanos , Estimativa de Kaplan-Meier , Linite Plástica/imunologia , Linite Plástica/mortalidade , Linite Plástica/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Neoplasias Gástricas/imunologia , Neoplasias Gástricas/mortalidade , Neoplasias Gástricas/patologia
9.
Eur J Med Res ; 16(10): 437-44, 2011 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-22024422

RESUMO

Patients with ESCC (squamous cell carcinoma of the esophagus) are most commonly diagnosed with locally advanced tumor stages. Early metastatic disease and late diagnosis are common reasons responsible for this tumor's poor clinical outcome. The prognosis of esophageal cancer is very poor because patients usually do not have symptoms in early disease stages. Squamous cell carcinoma of the esophagus frequently complicates patients with multiple co-morbidities and these patients often require interdisciplinary diagnosis and treatment procedures. At present time, neoadjuvant radiation therapy and chemotherapy followed by surgery are regarded as the international standard of care. Meta-analyses have confirmed that this approach provides the patient with better local tumor control and an increased overall survival rate. It is recommended that patients with positive tumor response to neoadjuvant therapy and who are poor surgical candidates should consider definitive radiochemotherapy without surgery as a treatment option. In future, EGFR antibodies may also be administered to patients during therapy to improve the current treatment effectiveness. Positron-emission tomography proves to be an early response-imaging tool used to evaluate the effect of the neoadjuvant therapy and could be used as a predictive factor for the survival rate in ESCC. The percentage proportions of residual tumor cells in the histopathological analyses represent a gold standard for evaluating the response rate to radiochemotherapy. In the future, early response evaluation and molecular biological tests could be important diagnostic tools in influencing the treatment decisions of ESCC patients.


Assuntos
Carcinoma de Células Escamosas/terapia , Neoplasias Esofágicas/terapia , Esofagectomia , Terapia Neoadjuvante , Carcinoma de Células Escamosas/patologia , Quimioterapia Adjuvante , Terapia Combinada , Neoplasias Esofágicas/patologia , Humanos , Metanálise como Assunto , Estadiamento de Neoplasias , Radioterapia Adjuvante , Padrão de Cuidado , Taxa de Sobrevida , Resultado do Tratamento
10.
Eur J Med Res ; 16(10): 451-6, 2011 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-22024424

RESUMO

OBJECTIVE: Insulin-like growth factor (IGF)-1, -2 and Insulin like growth factor binding proteins (IGFBP) are involved in the proliferation and differentiation of cells. It has never been evaluated, if the IGF-system can serve as a tumor marker in neoplasms. METHODS: In our prospective study 163 patients with colorectal cancer (22), prostate cancer (21), head and neck tumors (17), lymphomas (20), lung cancer (34) and other entities (49) were analysed for their IGF and IGFBP serum levels at the beginning and the end of radiotherapy and compared to 13 healthy people. Subgroups of patients with local tumor disease versus metastatic disease, primary and recurrent therapy and curative versus palliative therapy were compared. RESULTS: The serum levels of IGF-2 were significantly elevated in patients with prostate and colorectal cancer. However, sensitivity and specificity were only 70%. IGFBP-2 serum levels were elevated in patients with head and neck tumors. Again sensitivity and specificity were only 73%. A difference between local disease and metastatic disease could not be found. A difference between IGF serum levels before and after radiotherapy could not be detected. CONCLUSION: The IGF-system cannot serve as a new tumor marker. The detected differences are very small, sensitivity and specificity are too low. IGF measurement is not useful for the evaluation of the success of radiotherapy in malignancies.


Assuntos
Biomarcadores Tumorais/sangue , Proteína 2 de Ligação a Fator de Crescimento Semelhante à Insulina/sangue , Proteína 3 de Ligação a Fator de Crescimento Semelhante à Insulina/sangue , Fator de Crescimento Insulin-Like II/metabolismo , Fator de Crescimento Insulin-Like I/metabolismo , Neoplasias/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Estudos de Coortes , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias/diagnóstico , Prognóstico , Estudos Prospectivos , Sensibilidade e Especificidade , Adulto Jovem
11.
Zentralbl Chir ; 135(4): 307-11, 2010 Aug.
Artigo em Alemão | MEDLINE | ID: mdl-20806132

RESUMO

Rectovaginal fistuale (RVF) are a serious and disabling problem for the patients and a surgical challenge for the treating physicians. The most common causes of RVF are postoperative complications, inflammatory bowel disease, complications of radiotherapy, obstetric complications, and neoplasia. Therapeutic options are diverse and results often unsatisfactory. This article presents the treatment of patients with rectovaginal fistulae in the general surgery department of University Hospital in Duesseldorf, Germany. The therapeutic strategy for treatment of RVF is divided according to aetiology, localisation, and comorbidity. A diverting ileostomy is particularly useful if acute inflammation exists. Secondary repair may then be a better option. An initial approach with a local repair by preanal repair is justified in low RVF. For failures muscle flaps are promising.


Assuntos
Medicina de Precisão , Fístula Retovaginal/terapia , Algoritmos , Colposcopia/métodos , Comorbidade , Feminino , Humanos , Ileostomia , Microcirurgia/métodos , Períneo/cirurgia , Fístula Retovaginal/etiologia , Reoperação/métodos , Prevenção Secundária , Retalhos Cirúrgicos/irrigação sanguínea
12.
Geburtshilfe Frauenheilkd ; 76(3): 261-267, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27064835

RESUMO

Background: Childhood maltreatment (CM) can increase the risk of psychosocial risk factors in adulthood (e. g. intimate partner violence, financial problems, substance abuse or medical problems). The transition to parenthood presents those affected by CM with particular challenges, in addition to usual birth-related stressors. Methods: In this cross-sectional study a total of 240 women were interviewed in the puerperium with respect to CM experiences, using the German version of the Childhood Trauma Questionnaire (CTQ). Current psychosocial risk factors (e. g. financial concerns, maternal mental illness, single parent) were assessed using the Constance Index (KINDEX) for early childhood risk factors. Associations between CM experience and psychosocial risk factors were calculated using simple correlation. Results: The average age of participants was 33 years. On the CTQ 13.8 % of participants reported emotional abuse, 6.7 % physical abuse and 12.5 % sexual abuse, while 32.1 % reported emotional neglect and 7.5 % physical neglect during childhood. With rising severity of CM, more psychosocial risk factors (KINDEX) were present. Conclusions: This study shows a clear association between experiences of maltreatment during childhood and the presence of psychosocial stressors among women in the puerperium. Regular screening for a history of CM and parental psychosocial stressors should be conducted early, i.e. during pregnancy, to avoid negative consequences for the child.

13.
Clin Hemorheol Microcirc ; 64(4): 735-745, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27767982

RESUMO

OBJECTIVE: To evaluate the efficacy of strain elastography (SE) using semi-quantitative measurement methods compared to constrast enhanced ultrasound during liver tumor surgery (Io-CEUS) for dignity assessment of focal liver lesions(FLL). MATERIAL AND METHODS: Prospective data acquisition and retrospective analysis of US data of 100 patients (116 lesions) who underwent liver tumor surgery between 10/2010 and 03/2016. Retrospective reading of SE color patterns was performed establishing groups depending on dominant color (>50% blue = stiff, inhomogenous, >50% yellow/red/green = soft tissue). Semi-quantitative analysis was performed by Q-analysis based on a scale from 0 (soft) to 6 (stiff). 2 ROIs were placed centrally, 5 ROIs in the lesion's surrounding tissue. Io-CEUS was performed by bolus injection of 5-10 ml sulphurhexaflourid microbubbles evaluating wash-in- and -out- kinetics in arterial, portal venous and late phase. Histopathology after surgical resection served as goldstandard. RESULTS: 100 patients (m: 65, f: 35, mean age 60.5 years) with 116 liver lesions were included. Lesion's size ranged from 0.5 to 8.4 cm (mean 2.42 cm SD±1.44 cm). Postoperative histology showed 105 malignant and 11 benign lesions. Semi-quantitative analysis showed central indurations of >2.5 in 76/105 cases suggesting malignancy. 7 benign lesions displayed no central indurations correctly characterized benign by SE. ROC-analysis and Youden index showed a sensitivity of 72.4% and specificity of 63.6% assuming a cut-off of 2.5. Io-CEUS correctly characterized 103/105 as malignant. Sensitivity was 98%, specificity 72.7%. CONCLUSION: Strain elastography is a valuable tool for non-invasive characterization of FLLs. Semi-quantitative intratumoral stiffness values of >2.5 suggested malignancy. However, sensitivity of Io-CEUS in detecting malignant lesions was higher compared to SE. In conclusion SE should be considered for routine use during intraoperative US in addition to Io-CEUS for optimization of curative liver surgery.


Assuntos
Meios de Contraste/uso terapêutico , Técnicas de Imagem por Elasticidade/métodos , Neoplasias Hepáticas/cirurgia , Ultrassonografia/métodos , Adulto , Idoso , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Neoplasias Hepáticas/patologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos
14.
Transl Psychiatry ; 5: e571, 2015 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-26080088

RESUMO

Stress, particularly when experienced early in life, can have profound implications for mental health. Previous research covering various tissues such as the brain, suggests that the detrimental impact of early-life stress (ELS) on mental health is mediated via epigenetic modifications including DNA methylation. Genes of the hypothalamic-pituitary-adrenal axis--in particular, the glucocorticoid receptor (hGR) gene--stand out as key targets for ELS. Even though the link between hGR methylation and either ELS or psychopathology is fairly well established, the mutually dependent relationships between ELS, DNA methylation and psychopathology remain to be uncovered. The specific psychopathology an individual might develop in the aftermath of stressful events can be highly variable, however, most studies investigating hGR methylation and psychopathology suffer from being limited to a single symptom cluster of mental disorders. Here, we screened volunteers for childhood maltreatment and analyzed whether it associates with hGR methylation in lymphocytes and a range of measures of psychological ill-health. hGR methylation in lymphocytes most likely reflects methylation patterns found in the brain and thus provides valuable insights into the etiology of psychopathology. We find the interaction between childhood maltreatment and hGR methylation to be strongly correlated with an increased vulnerability to psychopathology providing evidence of epigenome × environment interactions. Furthermore, our results indicate an additive effect of childhood maltreatment and hGR methylation in predicting borderline personality disorder (BPD)-associated symptoms, suggesting that the combination of both ELS and DNA methylation that possibly represents unfavorable events experienced even earlier in life poses the risk for BPD.


Assuntos
Sobreviventes Adultos de Maus-Tratos Infantis/psicologia , Maus-Tratos Infantis/psicologia , Metilação de DNA , Interação Gene-Ambiente , Transtornos Mentais/genética , Receptores de Glucocorticoides/genética , Adolescente , Ansiedade/genética , Ansiedade/psicologia , Transtornos de Deficit da Atenção e do Comportamento Disruptivo/genética , Transtornos de Deficit da Atenção e do Comportamento Disruptivo/psicologia , Transtorno da Personalidade Borderline/genética , Transtorno da Personalidade Borderline/psicologia , Criança , Estudos de Coortes , Depressão/genética , Depressão/psicologia , Epigênese Genética , Feminino , Predisposição Genética para Doença , Humanos , Masculino , Transtornos Mentais/psicologia , Adulto Jovem
15.
Matrix Biol ; 17(8-9): 673-7, 1998 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-9923660

RESUMO

We have generated monoclonal antibodies against recombinant C-terminal human procollagen alpha1(III) propeptide (PIIICP), produced in E. coli in high yields. The monoclonal antibodies were screened for epitope specificity using recombinant truncated PIIICP. Several antibodies were identified which recognized different regions of the PIIICP molecule. The ability of the antibodies to detect PIIICP antigens in human cell line lysates and supernatants was demonstrated. As PIIICP antigens are a key marker of extracellular matrix metabolism, the monoclonal antibodies described here should be of value for clinical and basic research.


Assuntos
Anticorpos Monoclonais/imunologia , Epitopos de Linfócito B/imunologia , Peptídeos/imunologia , Pró-Colágeno/imunologia , Linhagem Celular , Mapeamento de Epitopos , Expressão Gênica , Humanos , Peptídeos/genética , Pró-Colágeno/genética , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/imunologia
16.
Tissue Eng ; 5(6): 563-72, 1999 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-10611548

RESUMO

Research efforts to modify cultured autologous skin transplants for large full-thickness burn wounds and in chronic ulcers have shifted from multilayered differentiated grafts ("sheet" grafts) toward smaller units of basal undifferentiated single cell suspensions in a transport medium and subconfluently covered static carriers. It has been shown that wounds transplanted with single cell suspensions reconstitute the epidermis. However, this technique requires the detachment of the keratinocytes from the culture flasks by enzymatic digestion-digestion that might alter the anchoring proteins of the cells. A new approach might be to circumvent the enzymatic digestion to harvest the keratinocytes. This study reports a technique to culture epidermal cells on spherical microcarriers as a suspension culture and transport vehicle. The spherical microcarrier consists of a 100-microm-diameter collagen-coated dextran carrier (Cytodex 3 Pharmacia) and has been used previously for enzyme production commercially. With this new approach, we seeded the human keratinocytes in a spinner-like system onto microspheres and transplanted these micrografts onto full-thickness wounds on the back of nude mice. After 14 days, we showed a reconstituted epithelium that was multilayered and keratinized compared to control wounds. We believe that this is the first step of a new approach to increase the cell yield for seeding without altering the anchoring proteins by enzymatic steps, leading to a superior transplantation method for keratinocytes.


Assuntos
Técnicas de Cultura de Células/instrumentação , Transplante de Células/instrumentação , Epiderme/lesões , Queratinócitos/transplante , Microesferas , Cicatrização , Adulto , Animais , Dorso , Divisão Celular , Células Cultivadas/transplante , Colágeno , Criopreservação , Meios de Cultura Livres de Soro , Dextranos , Epiderme/patologia , Humanos , Queratinócitos/citologia , Camundongos , Camundongos Nus , Transplante Heterólogo
17.
DNA Cell Biol ; 9(5): 355-68, 1990 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-2372377

RESUMO

A combination of the gel retardation assay and interference by hydroxyl radical modification (missing nucleoside technique) was used to analyze the interaction of the glucocorticoid receptor (GR) with various glucocorticoid responsive elements (GRE). Short oligonucleotides containing the 15-bp GRE and 1 to 3 flanking base pairs on each side, are bound with very low affinity. The same GREs, when positioned in the center of a large DNA fragment (40-50 bp), show high affinity for the receptor. However, when the GRE is positioned at the border of a 54-bp fragment, the affinity of the GR for the GRE decreases markedly. The DNA binding affinity increases linearly with each added flanking base pair and optimal binding is observed with 8-10 flanking bp. Thus, the nonconserved DNA sequences flanking the GRE contribute significantly to the free energy of receptor binding to DNA. Using larger DNA fragments (greater than 100 bp) and a smaller form of the receptor (40 kD), two retarded complexes are found that correspond to monomeric and homodimeric receptor DNA complexes. The DNA-binding domain of the GR (20 kD), expressed in bacteria, binds to the GRE as a monomer as well as a dimer and can form heterodimers with the native 94-kD GR. Insertion or deletion of one single base pair between the two halves of the GRE reduces the affinity for the homodimeric form of the native GR, and inhibits the function of the GRE in gene transfer experiments, suggesting that a dimer of the GR is the functional entity that binds to the GRE.


Assuntos
Proteínas de Ligação a DNA/metabolismo , Receptores de Glucocorticoides/metabolismo , Animais , Sequência de Bases , DNA/metabolismo , Técnicas In Vitro , Dados de Sequência Molecular , Ligação Proteica , Ratos , Proteínas Recombinantes/metabolismo , Sequências Reguladoras de Ácido Nucleico , Ativação Transcricional/genética , Transfecção
18.
Anticancer Res ; 18(3C): 2107-37, 1998.
Artigo em Inglês | MEDLINE | ID: mdl-9703770

RESUMO

Mammography, and in special cases MRT, allow the detection of DCIS and microcarcinomas. Breast preserving surgery needs intraoperative care for tumor free margins. Decision making under favourable and unfavourable conditions is discussed. Tumor grading is important with respect to locoregional recurrences. Improvements in breast cancer diagnosis are discussed in a separate paper in the same volume. The significance of c-erbB2 in pT1N0M0 stage has been determined in 472 cases. Within the c-erbB family, c-erbB2 has highest significance. p53 should also be evaluated with respect to tumor progress. In a few cases of malignant cystosarcoma phyllodes, p53 reaction was found in epithelial and mesenchymal cell systems. These results correspond to the results of Domagala et al (90) which show that vimentin positivity correlates with high proliferation, a high degree of malignancy and c-erbB2 positivity. Finally, the significance of angiogenesis with respect to the ineffective knot-formation for tumor cell transport and detachment of epithelia with apoptosis are discussed. The significance of proteolytic activity of cancer according to the results of Schmitt et al (89) is included in the discussion. Biochemical analysis seems to be much more effective for prediction of metastatic process as compared with immunohistochemical evaluations.


Assuntos
Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Tomada de Decisões , Carcinoma in Situ/patologia , Carcinoma in Situ/cirurgia , Carcinoma Ductal de Mama/patologia , Carcinoma Ductal de Mama/cirurgia , Feminino , Humanos , Procedimentos Cirúrgicos Operatórios
19.
ASAIO J ; 40(4): 1012-6, 1994.
Artigo em Inglês | MEDLINE | ID: mdl-7858320

RESUMO

The concentration of bacteria and endotoxin in dialysis water and dialysate of 30 dialysis centers in western Germany was examined. Water samples were obtained after treatment by reverse osmosis or other processing methods. Collection of dialysis samples for bacterial, fungal, and endotoxin analysis was conducted before and 2 hours after start of hemodialysis. In 17.8% of all water samples analyzed, the AAMI standard was exceeded and bacterial and fungal counts greater than 200 colony forming units/ml were found. In 11.7% of all dialysate samples, higher contamination than the recommendations for dialysate of 2000 colony forming units/ml were found. The concentration of endotoxin in water and dialysate varied between 0 and 95 endotoxin units in the water samples and 0 and 487 endotoxin units/ml in the dialysate samples. In 12.2% of all water sampled, and 27.5% of all dialysate samples, values of 5 endotoxin units/ml were found. No correlation was found between the level of contamination of either water or dialysate in a specific center and the following factors: water processing method (reverse osmosis or others), type of dialysate (acetate of bicarbonate), type of dialysate machine, or method of machine disinfection. In view of these results it is suggested that endotoxin testing, especially in the dialysate, be a part of regular quality control in dialysis.


Assuntos
Bactérias/isolamento & purificação , Soluções para Diálise/química , Endotoxinas/análise , Contaminação de Equipamentos , Fungos/isolamento & purificação , Unidades Hospitalares de Hemodiálise/estatística & dados numéricos , Falência Renal Crônica/terapia , Diálise Renal/normas , Coleta de Dados , Alemanha Ocidental , Unidades Hospitalares de Hemodiálise/normas , Humanos , Controle de Qualidade , Diálise Renal/efeitos adversos , Especificidade da Espécie , Microbiologia da Água
20.
IEEE Eng Med Biol Mag ; 18(2): 101-8, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10101675

RESUMO

Although rhythm and music are not entirely synonymous terms, rhythm constitutes one of the most essential structural and organizational elements of music. When considering the effect of music on human adaptation, the profound effect of rhythm on the motor system strongly suggests that the time structure of music is the essential element relating music specifically to motor behavior. Why the motor system appears so sensitive to auditory priming and timing stimulation can only be partially answered so far. The high-performance function of the auditory system regarding processing of time information makes good functional sense within the constraints of auditory sensory processing. Thus, the motor system sensitivity to auditory entrainment may simply be an evolutionary useful function of taking advantage of the specific and unique aspects of auditory information processing for enhanced control and organization of motor behavior; e.g, in the time domain. Unlike processes in the motor system, many other physiological processes cannot be effectively entrained by external sensory stimuli. For example, there is probably a very good protective reason why other cyclical physiological processes (e.g., autonomic processes such as heart rate) have only very limited entrainment capacity to external rhythmic cues. Some of the basic auditory-motor arousal connections may also have their basis in adaptive evolutionary processes related to survival behavior; e.g., in fight or flight reactions. Much of the "why" in auditory-motor interactions, however, remains unknown heuristically. In the absence of this knowledge, great care should be taken to not compensate for this lack of understanding of specific cause and effect processes by assigning anthropomorphic descriptions to the behavior of biological and physical systems. The unraveling of the perceptual, physiological, and neuroanatomical basis of the interaction between rhythm and movement has been, and continues to be, a fascinating endeavor with important ramifications for the study of brain function, sensory perception, and motor behavior. One of the most exciting findings in this research, however, may be the evidence that the interaction between auditory rhythm and physical response can be effectively harnessed for specific therapeutic purposes in the rehabilitation of persons with movement disorders.


Assuntos
Encéfalo/fisiologia , Música , Estimulação Acústica , Adaptação Fisiológica , Braço/fisiopatologia , Nível de Alerta/fisiologia , Percepção Auditiva/fisiologia , Comportamento/fisiologia , Transtornos Cerebrovasculares/complicações , Eletromiografia , Reação de Fuga , Hemiplegia/fisiopatologia , Hemiplegia/terapia , Humanos , Atividade Motora/fisiologia , Transtornos dos Movimentos/terapia , Músculo Esquelético/fisiologia , Musicoterapia , Doença de Parkinson/terapia , Percepção/fisiologia , Periodicidade , Sensação/fisiologia
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