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2.
Eur J Nucl Med Mol Imaging ; 49(6): 1822-1832, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-34957527

RESUMO

PURPOSE: The fibroblast activation protein (FAP) is an emerging target for molecular imaging and therapy in cancer. OncoFAP is a novel small organic ligand for FAP with very high affinity. In this translational study, we establish [68Ga]Ga-OncoFAP-DOTAGA (68Ga-OncoFAP) radiolabeling, benchmark its properties in preclinical imaging, and evaluate its application in clinical PET scanning. METHODS: 68Ga-OncoFAP was synthesized in a cassette-based fully automated labeling module. Lipophilicity, affinity, and serum stability of 68Ga-OncoFAP were assessed by determining logD7.4, IC50 values, and radiochemical purity. 68Ga-OncoFAP tumor uptake and imaging properties were assessed in preclinical dynamic PET/MRI in murine subcutaneous tumor models. Finally, biodistribution and uptake in a variety of tumor types were analyzed in 12 patients based on individual clinical indications that received 163 ± 50 MBq 68Ga-OncoFAP combined with PET/CT and PET/MRI. RESULTS: 68Ga-OncoFAP radiosynthesis was accomplished with high radiochemical yields. Affinity for FAP, lipophilicity, and stability of 68Ga-OncoFAP measured are ideally suited for PET imaging. PET and gamma counting-based biodistribution demonstrated beneficial tracer kinetics and high uptake in murine FAP-expressing tumor models with high tumor-to-blood ratios of 8.6 ± 5.1 at 1 h and 38.1 ± 33.1 at 3 h p.i. Clinical 68Ga-OncoFAP-PET/CT and PET/MRI demonstrated favorable biodistribution and kinetics with high and reliable uptake in primary cancers (SUVmax 12.3 ± 2.3), lymph nodes (SUVmax 9.7 ± 8.3), and distant metastases (SUVmax up to 20.0). CONCLUSION: Favorable radiochemical properties, rapid clearance from organs and soft tissues, and intense tumor uptake validate 68Ga-OncoFAP as a powerful alternative to currently available FAP tracers.


Assuntos
Radioisótopos de Gálio , Neoplasias , Animais , Fibroblastos/metabolismo , Humanos , Ligantes , Camundongos , Neoplasias/metabolismo , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Compostos Radiofarmacêuticos , Distribuição Tecidual
3.
Eur J Med Genet ; 64(10): 104293, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34352413

RESUMO

Bloom Syndrome (BS) is a genetic DNA repair disorder, caused by mutations in the BLM gene. The clinical phenotype includes growth retardation, immunodeficiency and a strong predisposition to different types of malignancies. Treatment of malignancies in BS patients with radiotherapy or chemotherapy is believed to be associated with increased toxicity, but clinical and laboratory data are lacking. We collected clinical data of two Dutch BS patients with solid tumors. Both were treated with radiotherapy before the diagnosis BS was made and tolerated this treatment well. In addition, we collected fibroblasts from BS patients to perform in vitro clonogenic survival assays to determine radiosensitivity. BS fibroblasts showed less radiosensitivity than the severely radiosensitive Artemis fibroblasts. Moreover, studies of double strand break kinetics by counting 53BP1 foci after irradiation showed similar patterns compared to healthy controls. In combination, the clinical cases and laboratory experiments are valuable information in the discussion whether radiotherapy is absolutely contraindicated in BS, which is the Case in other DNA repair syndromes like Ataxia Telangiectasia and Artemis.


Assuntos
Síndrome de Bloom/complicações , Carcinoma/radioterapia , Radioterapia/efeitos adversos , Adulto , Síndrome de Bloom/genética , Carcinoma/complicações , Células Cultivadas , Quebras de DNA de Cadeia Dupla , Reparo do DNA , Feminino , Fibroblastos/efeitos da radiação , Humanos , Masculino , Pessoa de Meia-Idade , Tolerância a Radiação , RecQ Helicases/genética
4.
Eur J Pediatr ; 179(2): 251-256, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31709473

RESUMO

Ataxia telangiectasia (A-T) is a severe neurodegenerative disorder with variable immunodeficiency. Together with the Dutch A-T community, we investigated the opinion of A-T parents on an early A-T diagnosis in the asymptomatic phase of the disease. During an annual national meeting for A-T patients and families, the topic of an early A-T diagnosis was discussed in relation to the recent introduction of neonatal screening for severe combined immunodeficiency (SCID) in the Netherlands. Based on the discussion, individual arguments were identified and processed into a questionnaire, which was sent out to 64 A-T parents (32 families). Arguments included were insecurity to diagnosis, possible medical advantages, appropriate genetic counseling and family planning, loss of "golden" year(s), and early cancer screening for parents. The response rate was 55% (n = 35 parents). Twenty-six (74%) parents felt that the advantages of an early diagnosis outweighed the disadvantages, five parents thought that the disadvantages would outweigh the advantages (14%), and four parents did not indicate a preference.Conclusion: The majority of parents of a child with A-T would have preferred an early diagnosis during the asymptomatic phase of the disease, because the uncertainty during the diagnostic process had had a major impact on their lives. In addition, the knowledge of being carriers of an ATM gene mutation influenced decisions about family planning. Parents who opposed against an early diagnosis emphasized the joy of having a seemingly healthy child until diagnosis.What is Known:• Ataxia telangiectasia (A-T) is a devastating DNA repair disorder with a huge impact on quality of life of patients and their parents.• Patients with A-T may incidentally be identified at birth as the consequence of neonatal screening for severe combined immunodeficiency (SCID).What is New:• The majority of Dutch parents of A-T patients (74%) would have preferred an early diagnosis of their child in the asymptomatic phase of the disease.• Major arguments for an early A-T diagnosis were (1) the experienced insecurity in diagnostic trajectories and its impact on families and (2) the knowledge of being ATM mutation carriers when deciding about family planning. An argument against an early diagnosis is losing the joy of having a seemingly healthy child until diagnosis.


Assuntos
Ataxia Telangiectasia/diagnóstico , Ataxia Telangiectasia/genética , Diagnóstico Precoce , Aconselhamento Genético , Triagem Neonatal/métodos , Inquéritos e Questionários , Adulto , Ataxia Telangiectasia/epidemiologia , Pré-Escolar , Feminino , Predisposição Genética para Doença , Humanos , Incidência , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Países Baixos/epidemiologia , Relações Pais-Filho , Pais/psicologia , Medição de Risco
5.
Burns ; 43(1): 200-205, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27554629

RESUMO

INTRODUCTION: The diffuse epidermal exfoliation seen in Steven Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) is similar to skin loss in second degree burns, and many of these patients are referred for treatment at burn centers. Treatment can differ markedly from center to center, and mortality can range from 25% to 70%, including a considerable morbidity. However, our experience over a 15-year period from 2000 to 2015 with 40 patients found a mortality rate of only 10% (4/40). The purpose of this paper is to discuss our treatment algorithm as a model for other centers treating SJS/TENs patients. METHODS: Records were reviewed for all patients admitted to the LAC+USC burn unit between 2000 and 2015 and 40 patients were identified with biopsy-proven SJS or TENS. These cases were reviewed for age, gender, initial and greatest TBSA, causative drug, pre-existing medical conditions, and morbidity and mortality. All data were entered into the SPSS statistical software package and all statistical analyses were performed using this program. RESULTS: Our treatment algorithm focused on early referral to a specialty burn unit, immediate discontinuation of the offending drug, fluid resuscitation, nutritional supplementation, and meticulous wound care. Average time to transfer to a burn unit was 3.36 days. Silver-releasing antimicrobial dressings were applied to the affected skin surface and changed every 3 days. Mupirocin coated petroleum gauze was used for facial involvement. Steroids were tapered and discontinued if initiated at an outside facility (58% of patients), and starting after 2001, all patients received a course of IVIG. All patients received fluid resuscitation and the majority received supplemental tube feedings (69%). Average length of total stay was 17.1 days and length of ICU stay 15.9 days. While 44% were transferred to another facility for further rehabilitative care, 37% of patients discharge to home. In patients discharged home with complete resolution of skin lesions, time to healing was an average of 14 days. DISCUSSION: With our 10% mortality rate in 40 patients, our study represents a relatively large study population while maintaining a relatively low mortality rate. The demographic data from our study largely aligns with the existing literature, and we therefore feel that our low mortality rate is due to our treatment algorithm, rather than to a less severe pathology in our patient population. This claim is supported by a standard mortality ratio of 1.68. This ratio proves a significantly improved mortality than would be expected based on disease severity on admission.


Assuntos
Algoritmos , Antibacterianos/uso terapêutico , Anti-Infecciosos Locais/uso terapêutico , Nutrição Enteral , Hidratação , Imunoglobulinas Intravenosas/uso terapêutico , Fatores Imunológicos/uso terapêutico , Síndrome de Stevens-Johnson/terapia , Administração Cutânea , Alopurinol/efeitos adversos , Antibacterianos/efeitos adversos , Anticonvulsivantes/efeitos adversos , Bandagens , Superfície Corporal , Unidades de Queimados , Protocolos Clínicos , Feminino , Supressores da Gota/efeitos adversos , Hospitalização , Humanos , Unidades de Terapia Intensiva , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Mupirocina/uso terapêutico , Transferência de Pacientes , Poliésteres/uso terapêutico , Polietilenos/uso terapêutico , Centros de Reabilitação , Estudos Retrospectivos , Índice de Gravidade de Doença , Síndrome de Stevens-Johnson/etiologia , Síndrome de Stevens-Johnson/mortalidade
6.
Prev Med ; 69: 280-6, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25456812

RESUMO

BACKGROUND: Mammographic screening may reduce breast cancer mortality by about 20%, provided participation is high and women screen regularly. We quantified independent risk factors for failing to rescreen and built a model to predict how rescreening rates change if these risk factors would be modified. METHODS: Multivariate analysis was used to analyze data from a prospective study which included a self-administered questionnaire and rescreening status 30months after a t0 mammogram, using a random sample of women 50-67years (Belgium 2010-2013). RESULTS: A false positive result at the most recent past mammogram (Odds Ratio=5.0, 95% Confidence Interval 3.6-6.8), an interval until new invitation greater than 25months (Odds Ratio=4.8 for >29months, 95% Confidence Interval 2.9-8.1), waiting times in the mammography unit >1h (Odds Ratio=2.1, 95% Confidence Interval 1.2-3.7) and difficulties in reaching the unit (Odds Ratio=2.5, 95% Confidence Interval 1.4-4.4) were the strongest independent predictors for failing to rescreen. The area under the curve of the receiver operating characteristic analysis was 0.705 for the model development stage and 0.717 for the validation stage and goodness-of-fit was good. CONCLUSIONS: Maintaining an invitation cycle of maximum 25months, limiting waiting time in the mammography unit and lowering the number of false positives could increase breast cancer screening compliance.


Assuntos
Mamografia/psicologia , Mamografia/estatística & dados numéricos , Cooperação do Paciente/psicologia , Cooperação do Paciente/estatística & dados numéricos , Idoso , Bélgica , Neoplasias da Mama/diagnóstico , Reações Falso-Positivas , Feminino , Acessibilidade aos Serviços de Saúde , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Curva ROC , Fatores de Risco , Inquéritos e Questionários
7.
Eur J Cancer ; 50(15): 2592-601, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25096168

RESUMO

BACKGROUND: Weekly paclitaxel/carboplatin might improve survival in platinum-resistant epithelial ovarian cancer (EOC). We compared efficacy of first-line weekly to three-weekly paclitaxel/cis- or carboplatin (PCw and PC3w) induction therapy, followed by either three or six PC3w cycles. PATIENTS AND METHODS: In this multicentre, randomised phase III trial with 2×2 design, patients with FIGO stage IIb-IV EOC were randomised to six cycles PCw (paclitaxel 90mg/m(2), cisplatin 70mg/m(2) or carboplatin AUC 4) or three cycles PC3w (paclitaxel 175mg/m(2), cisplatin 75mg/m(2) or carboplatin AUC 6), followed by either three or six cycles PC3w. Primary endpoints were progression free survival (PFS) and overall survival (OS). Secondary endpoints were response rate (RR) and toxicity. RESULTS: Of 267 eligible patients, 133 received PCw and 134 PC3w. The first 105 patients received cisplatin, after protocol amendment the subsequent 162 patients received carboplatin. Weekly cisplatin was less well tolerated than weekly carboplatin. All PC3w cycles were well tolerated. At the end of all treatments, RR was 90.8% with no differences between the treatment arms. After a follow-up of median 10.3years (range 7.1-14.8), median PFS was 18.5 (95% confidence interval (CI) 15.9-21.0) months for PCw and 16.4 (95% CI 13.5-19.2) months for PC3w (p=0.78). Median OS was 44.8 (95% CI 33.1-56.5) months for PCw and 41.1 (95% CI 34.4-47.7) months for PC3w (p=0.98). CONCLUSIONS: There was no benefit in terms of OS, PFS or RR for a weekly regimen nor for extended chemotherapy as first-line treatment for EOC in European patients.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Epiteliais e Glandulares/tratamento farmacológico , Neoplasias Ovarianas/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carboplatina/administração & dosagem , Carboplatina/efeitos adversos , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Intervalo Livre de Doença , Esquema de Medicação , Europa (Continente) , Fadiga/induzido quimicamente , Feminino , Seguimentos , Humanos , Quimioterapia de Indução , Pessoa de Meia-Idade , Náusea/induzido quimicamente , Neoplasias Epiteliais e Glandulares/patologia , Neutropenia/induzido quimicamente , Neoplasias Ovarianas/patologia , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos , Fatores de Tempo , Resultado do Tratamento , Vômito/induzido quimicamente , Adulto Jovem
8.
Clin Exp Immunol ; 178(2): 394-8, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25039369

RESUMO

Somatic hypermutation (SHM) is an important step in antigen-driven B cell development creating B lymphocytes expressing high-affinity antibody receptors. It is known that the peripheral B lymphocyte compartments of healthy children and adults differ considerably. However, the development of SHM with age has not been studied in detail previously. Therefore, we used the immunoglobulin (Ig)κ-restriction enzyme hot-spot mutation assay (Igκ-REHMA) to gain an estimation of SHM levels in different age groups in order to relate this to the size of the memory B lymphocyte subpopulations. We show that the level of SHM increases rapidly during the first 2 years of life. This reflects the changes of the memory B cell subpopulations, but also changes in the SHM within memory B cell subsets, probably reflecting an increase of secondary memory B cell responses.


Assuntos
Subpopulações de Linfócitos B/metabolismo , Rearranjo Gênico do Linfócito B , Receptores de Antígenos de Linfócitos B/genética , Hipermutação Somática de Imunoglobulina , Adolescente , Criança , Pré-Escolar , Imunodeficiência de Variável Comum/genética , Humanos , Lactente , Recém-Nascido
9.
Scand J Immunol ; 80(5): 354-61, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24910257

RESUMO

The patients with CD3γ deficiency can present with different clinical findings despite having the same homozygous mutation. We report three new CD3gamma-deficient siblings from a consanguineous family with a combined T-B+NK+ immunodeficiency and their variable clinical and cellular phenotypes despite the same homozygous mutation of the CD3G gene (c.80-1G>C). We also re-evaluate a previously reported non-consanguineous family with two CD3gamma-deficient siblings with the same mutation. The median age at diagnosis was 11 years (14 months-20 years). We found all five patients to display autoimmunity: autoimmune thyroiditis (n = 5), autoimmune haemolytic anaemia (n = 2), immune thrombocytopenia (n = 1), autoimmune hepatitis (n = 1), minimal change nephrotic syndrome (n = 1), vitiligo (n = 1) and positive antinuclear antibodies (n = 3) as well as high IgE (n = 2) and atopic eczema (n = 2). While CD3(+) TCRαß+T cell percentages were low in all patients, only one had lymphopenia and 3 had CD3(+) T cell lymphopenia. Strikingly, we report frequent and multiple autoimmunity in tested heterozygous carriers in both families (n = 6; in 67%), and frequent autoimmunity in family members not available for testing (n = 5, in 80%). The results suggest that CD3G should be studied as a candidate gene for autoimmunity and that CD3gamma deficiency should be considered among other primary immunodeficiencies with predominantly autoimmune manifestations.


Assuntos
Autoimunidade/genética , Complexo CD3/genética , Estudos de Associação Genética , Predisposição Genética para Doença , Tireoidite Autoimune/genética , Adulto , Anemia Hemolítica Autoimune/genética , Anticorpos Antinucleares/genética , Linfócitos B/imunologia , Criança , Dermatite Atópica/genética , Feminino , Hepatite Autoimune/genética , Humanos , Imunoglobulina E/biossíntese , Imunoglobulina E/genética , Imunoglobulina E/imunologia , Lactente , Células Matadoras Naturais/imunologia , Linfopenia/genética , Linfopenia/imunologia , Masculino , Nefrose Lipoide/genética , Linhagem , Púrpura Trombocitopênica Idiopática/genética , Linfócitos T/imunologia , Vitiligo/genética , Adulto Jovem
10.
Eur J Pediatr ; 173(12): 1695-8, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24723092

RESUMO

UNLABELLED: We present a case of a fatal Epstein-Barr infection in a 17-year-old male patient suspected to be caused by X-linked lymphoproliferative disease. At the time of hospitalization, DNA diagnostics was not available. The suspected diagnosis was confirmed several years later when a SH2D1A missense mutation was identified in stored patient DNA. Extended pedigree analysis showed that this mutation occurred de novo in his mother. In addition, we provide a summary of the currently listed SH2D1A mutations. CONCLUSION: This case report underlines the importance of DNA storage, pedigree analysis, and multidisciplinary care in patients with rare diseases and their families.


Assuntos
DNA/genética , Peptídeos e Proteínas de Sinalização Intracelular/genética , Transtornos Linfoproliferativos/genética , Mutação , Doenças Raras/genética , Adolescente , Adulto , Análise Mutacional de DNA , Diagnóstico Diferencial , Feminino , Humanos , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Transtornos Linfoproliferativos/diagnóstico , Transtornos Linfoproliferativos/metabolismo , Masculino , Linhagem , Fenótipo , Proteína Associada à Molécula de Sinalização da Ativação Linfocitária
12.
Eur J Cancer ; 49(6): 1254-63, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23276720

RESUMO

BACKGROUND: Weekly paclitaxel/cisplatin is effective in platinum-resistant epithelial ovarian cancer (EOC). To reduce toxicity, paclitaxel/cisplatin was replaced by paclitaxel/carboplatin. PATIENTS AND METHODS: Patients with progressive EOC after prior 3-weekly paclitaxel/carboplatin were treated with six cycles weekly paclitaxel 90 mg/m(2) and carboplatin area under the curve (AUC) 4 mg/ml/min, followed by six cycles 3-weekly paclitaxel/carboplatin. End-points were progression free survival (PFS), overall survival (OS), response rate (RR) and toxicity. RESULTS: Median progression free interval after last platinum was 9 (0-81) months in 108 patients; 43 were platinum-resistant, of whom 13 started weekly paclitaxel/carboplatin <6 months after progression. During 633 weekly cycles grade 3/4 toxicity included; thrombocytopenia 8%, neutropenia 30%, febrile neutropenia 0.5%. Non-haematologic toxicity was low. Treatment was delayed in 16%, and dose reduced in 2% of cycles. RR was 58% for platinum-resistant and 76% for platinum-sensitive patients, median PFS were 8 (range 1-21) and 13 (1-46) months, median OS 15 (1-69) and 26 (4-93) months, respectively. The 13 platinum-resistant patients with a platinum-therapy free interval <6 months had a significant shorter PFS (4 versus 10 months, p=0.035) and OS (9 versus 15 months, p=0.002). CONCLUSION: Six cycles weekly paclitaxel/carboplatin followed by six 3-weekly cycles is well-tolerated and highly active in platinum-resistant and platinum-sensitive patients.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Ovarianas/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carboplatina/administração & dosagem , Carboplatina/efeitos adversos , Intervalo Livre de Doença , Esquema de Medicação , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Feminino , Humanos , Quimioterapia de Indução/métodos , Pessoa de Meia-Idade , Náusea/induzido quimicamente , Gradação de Tumores , Neutropenia/induzido quimicamente , Neoplasias Ovarianas/patologia , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos , Trombocitopenia/induzido quimicamente , Fatores de Tempo , Resultado do Tratamento , Vômito/induzido quimicamente
13.
Leukemia ; 26(8): 1821-8, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22395360

RESUMO

Hematopoietic stem cell transplantation is becoming an increasingly important approach to treatment of different malignant and non-malignant disorders. There is thus growing demand for diagnostic assays permitting the surveillance of donor/recipient chimerism posttransplant. Current techniques are heterogeneous, rendering uniform evaluation and comparison of diagnostic results between centers difficult. Leading laboratories from 10 European countries have therefore performed a collaborative study supported by a European grant, the EuroChimerism Concerted Action, with the aim to develop a standardized diagnostic methodology for the detection and monitoring of chimerism in patients undergoing allogeneic stem cell transplantation. Following extensive analysis of a large set of microsatellite/short tandem repeat (STR) loci, the EuroChimerism (EUC) panel comprising 13 STR markers was established with the aim to optimally meet the specific requirements of quantitative chimerism analysis. Based on highly stringent selection criteria, the EUC panel provides multiple informative markers in any transplant setting. The standardized STR-PCR tests permit detection of donor- or recipient-derived cells at a sensitivity ranging between 0.8 and 1.6%. Moreover, the EUC assay facilitates accurate and reproducible quantification of donor and recipient hematopoietic cells. Wide use of the European-harmonized protocol for chimerism analysis presented will provide a basis for optimal diagnostic support and timely treatment decisions.


Assuntos
Transplante de Células-Tronco Hematopoéticas/normas , Quimeras de Transplante/genética , Europa (Continente) , Marcadores Genéticos , Testes Genéticos/métodos , Testes Genéticos/normas , Humanos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Transplante Homólogo
14.
Ann Oncol ; 22 Suppl 8: viii33-viii39, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22180397

RESUMO

Several studies in the past have tried to improve the prognosis of ovarian cancer by increasing the dose intensity of platinum. Only 2 out of 12 randomized studies showed survival benefit at the cost of significant long-term toxicity. Dose-dense induction therapy with combined weekly paclitaxel (at a dose of 90 mg/m(2)) and weekly carboplatin [at an area under the curve (AUC) of 4 mg·ml/min] followed by 3-weekly paclitaxel/carboplatin was very effective in platinum-resistant patients (response 58%, progression-free survival 10 months). In first-line, however, no survival benefit was found with the same dose-dense weekly paclitaxel/carboplatin regimen over standard-dosed 3-weekly paclitaxel/carboplatin in a randomized study. Very recently, the Japanese Gynecologic Oncology Group (JGOG) study no. 3016, randomizing patients in first-line between dose-dense weekly paclitaxel 80 mg/m(2) plus 3-weekly carboplatin AUC 6 and 3-weekly paclitaxel/carboplatin, showed a significant increase in progression-free survival (median 28 versus 17.2 months in the control arm; hazard ratio for progression, 0.71; 95% confidence interval, 0.58-0.88; P=0.0015). The 3-year overall survival was 72% versus 65% (P=0.03), respectively. The hematologic toxicity was substantial in both arms and substantially higher than observed with the weekly paclitaxel/carboplatin induction regimen. Many patients had treatment delays, dose reductions and stopped treatment prematurely. The JGOG 3016 study is the only dose-dense study with such a significant survival benefit. It is also the only dose-intensity study performed in Asian patients. Genotypes and phenotypes are thought to represent important determinants of drug efficacy in ovarian cancer. Therefore, confirmatory studies with this JGOG regimen together with translational research are needed in both Caucasian and Asian patients.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Neoplasias Epiteliais e Glandulares/tratamento farmacológico , Neoplasias Ovarianas/tratamento farmacológico , Carcinoma Epitelial do Ovário , Feminino , Humanos
15.
Scand J Immunol ; 74(5): 502-10, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21815909

RESUMO

Age-matched reference values are generally presented with 5th and 95th percentiles as 'normal' reference range. However, they are mostly determined in relatively small groups, which renders this presentation inaccurate. We determined reference values for B-lymphocyte subpopulations in healthy children with the statistical method of tolerance intervals that deals far better with the relatively small numbers tested, and compared these to the cut-off values used in the currently used EUROclass classification for common variable immunodeficiency disorders (CVID) in children. CVID is a heterogeneous group of primary immunodeficiency diseases characterized by low serum immunoglobulin levels and inadequate response to vaccination. Disease-modifying heterozygous amino acid substitutions in TACI are found in around ±10% of CVID patients. Interestingly, we found that age is the primary determinant of TACI-expression on B-lymphocytes, independent of switched memory B-lymphocyte numbers. Immunophenotyping of B-lymphocyte subpopulations is increasingly used to classify patients with CVID into subgroups with different clinical prognosis according to the composition of their B-lymphocyte compartment. These classifications were mainly developed with data obtained in adults. Because of the maturing paediatric immune system, they may not be equally applicable in children: our and other age-matched reference values show great changes in the composition of the B-lymphocyte compartment during development. Although the greatest changes in B-lymphocyte subpopulations occur below the age of 2 years, when the diagnosis of CVID cannot yet be made, it is likely that a classification developed in adults cannot be used to classify the prognosis of children.


Assuntos
Fatores Etários , Linfócitos B/metabolismo , Imunodeficiência de Variável Comum/diagnóstico , Imunodeficiência de Variável Comum/imunologia , Subpopulações de Linfócitos/metabolismo , Adolescente , Linfócitos B/imunologia , Linfócitos B/patologia , Bioestatística/métodos , Criança , Pré-Escolar , Imunodeficiência de Variável Comum/classificação , Imunodeficiência de Variável Comum/epidemiologia , Europa (Continente) , Regulação da Expressão Gênica no Desenvolvimento/imunologia , Humanos , Imunofenotipagem , Lactente , Recém-Nascido , Subpopulações de Linfócitos/imunologia , Subpopulações de Linfócitos/patologia , Guias de Prática Clínica como Assunto , Prognóstico , Padrões de Referência , Proteína Transmembrana Ativadora e Interagente do CAML/genética , Proteína Transmembrana Ativadora e Interagente do CAML/imunologia , Proteína Transmembrana Ativadora e Interagente do CAML/metabolismo
16.
Leukemia ; 25(9): 1467-70, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21681189

RESUMO

Analysis of short tandem repeats (STR) by PCR analysis is routinely used in chimerism diagnostics to monitor donor engraftment and to diagnose relapse. Some applications require chimerism analysis of low cell numbers, but no standardized protocol is available for DNA isolation from 1000 to 30,000 cells. The EU-supported EuroChimerism Consortium (project QLRT-2001-01485) selected four different protocols for 'small-scale' DNA isolation, which were tested by six laboratories for their ability to recover reproducible amounts of good quality DNA, suited for PCR-based STR analysis. The protocols included two direct lysis methods with and without detergents and proteinase K, and two commercial column-based kits. The direct lysis method using detergents and proteinase K showed the highest DNA recovery and the best performance in the multiplex PowerPlex16 STR assay. DNA isolated with this method also showed the highest sensitivity in chimerism analysis using singleplex PCR reactions of EuroChimerism STR markers. Sensitivity was reached ranging from 1 to 20% of recipient cells in a donor background. In conclusion, the direct lysis method using detergents and proteinase K is a standardized DNA isolation method well suited for chimerism studies on low cell numbers.


Assuntos
Quimerismo , DNA/genética , Marcadores Genéticos/genética , Transplante de Células-Tronco/normas , Sequências de Repetição em Tandem/genética , Triagem de Portadores Genéticos , Humanos , Neoplasia Residual/diagnóstico , Neoplasia Residual/genética , Albumina Sérica/genética , Albumina Sérica Humana , Doadores de Tecidos
17.
Genes Immun ; 12(6): 434-44, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21390052

RESUMO

Artemis deficiency is known to result in classical T-B- severe combined immunodeficiency (SCID) in case of Artemis null mutations, or Omenn's syndrome in case of hypomorphic mutations in the Artemis gene. We describe two unrelated patients with a relatively mild clinical T-B- SCID phenotype, caused by different homozygous Artemis splice-site mutations. The splice-site mutations concern either dysfunction of a 5' splice-site or an intronic point mutation creating a novel 3' splice-site, resulting in mutated Artemis protein with residual activity or low levels of wild type (WT) Artemis transcripts. During the first 10 years of life, the patients suffered from recurrent infections necessitating antibiotic prophylaxis and intravenous immunoglobulins. Both mutations resulted in increased ionizing radiation sensitivity and insufficient variable, diversity and joining (V(D)J) recombination, causing B-lymphopenia and exhaustion of the naive T-cell compartment. The patient with the novel 3' splice-site had progressive granulomatous skin lesions, which disappeared after stem cell transplantation (SCT). We showed that an alternative approach to SCT can, in principle, be used in this case; an antisense oligonucleotide (AON) covering the intronic mutation restored WT Artemis transcript levels and non-homologous end-joining pathway activity in the patient fibroblasts.


Assuntos
Proteínas Nucleares/genética , Oligorribonucleotídeos Antissenso/genética , Sítios de Splice de RNA/genética , Imunodeficiência Combinada Severa/genética , Linfócitos B/imunologia , Linfócitos B/patologia , Sequência de Bases , Células Cultivadas , Criança , Proteínas de Ligação a DNA , Endonucleases , Feminino , Humanos , Mutação , Proteínas Nucleares/deficiência , Tolerância a Radiação/genética , Radiação Ionizante , Análise de Sequência de DNA , Imunodeficiência Combinada Severa/patologia , Linfócitos T/imunologia , Linfócitos T/patologia
18.
Ann Oncol ; 22(6): 1346-1352, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21228333

RESUMO

BACKGROUND: Because it is insufficiently clear whether BRCA-associated epithelial ovarian cancer (EOC) is more chemosensitive than sporadic EOC, we examined response to chemotherapy, progression-free survival (PFS) and overall survival (OS) in BRCA1- and BRCA2-associated versus sporadic EOC patients. METHODS: Data about patient characteristics, response to and outcome after primary therapy, including chemotherapy, were collected from 99 BRCA1, 13 BRCA2 and 222 sporadic patients. Analyses were carried out using a chi-square test and Kaplan-Meier and Cox regression methods. RESULTS: Complete response (CR) or no evidence of disease (NED) was observed in 87% of the BRCA1 patients, progressive disease (PD) in 2%, being 71% and 15%, respectively, in sporadic EOC patients (P = 0.002). In BRCA2 patients, 92% had CR/NED, and none PD (P = 0.27). Median PFS in BRCA1, BRCA2 and sporadic patients was 2.1 [95% confidence interval (CI) 1.9-2.5] years (P = 0.006), 5.6 (95% CI 0.0-11.5) years (P = 0.008) and 1.3 (95% CI 1.1-1.5) years, respectively. Median OS in the three groups was 5.9 (95% CI 4.7-7.0) years (P < 0.001), >10 years (P = 0.008), and 2.9 (95% CI 2.2-3.5) years, respectively. A trend for a longer PFS and OS in BRCA2 compared with BRCA1 patients was observed. CONCLUSION: Compared with sporadic EOC patients, both BRCA1- and BRCA2-associated patients have improved outcomes after primary therapy, including chemotherapy.


Assuntos
Antineoplásicos/uso terapêutico , Proteína BRCA1/genética , Proteína BRCA2/genética , Neoplasias Ovarianas/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Intervalo Livre de Doença , Feminino , Humanos , Pessoa de Meia-Idade , Neoplasias Ovarianas/genética , Resultado do Tratamento
19.
Int J Gynecol Cancer ; 19(3): 431-46, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19407572

RESUMO

This paper covers an overview of the literature on the management of advanced endometrial cancer, concentrating on patients with histopathologic endometrioid type of tumors. The different treatment modalities are described and management recommendations are proposed.The standard surgical procedure includes an extrafacial total hysterectomy with bilateral salpingo-oophorectomy, collection of peritoneal washings for cytology, and exploration of the intraabdominal contents. In cases of extensive disease in the abdomen, an optimal surgical cytoreduction is associated with improved survival. Further treatment with radiotherapy may be indicated based on the pathological staging information to improve loco-regional control. Primary radiotherapy is indicated in cases where surgery is contraindicated. Systemic treatment can either be hormone therapy or chemotherapy. Progesterons are the cornerstone of hormone therapy. Prognostic factors for response are the presence of high levels of progesterone and estrogen receptors and low grade histology. Paclitaxel is the most active single agent drug. The combination therapy with paclitaxel and carboplatin is adopted as first choice in patients with endometrial cancer because of the efficacy and low toxicity, although not proven in a randomized trial.The literature on the management of patients with advanced endometrial cancer is discussed in detail. Each stage of advanced disease is presented separately, and management recommendations are proposed, and alternative approaches are given.Ongoing clinical trials are described, and the focuses of ongoing research are mentioned.


Assuntos
Carcinoma Endometrioide , Neoplasias do Endométrio , Carcinoma Endometrioide/tratamento farmacológico , Carcinoma Endometrioide/patologia , Carcinoma Endometrioide/cirurgia , Neoplasias do Endométrio/tratamento farmacológico , Neoplasias do Endométrio/patologia , Neoplasias do Endométrio/cirurgia , Feminino , Humanos
20.
Int J Gynecol Cancer ; 19(3): 314-20, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19407552

RESUMO

In this paper, an overview of the literature on the management of recurrent endometrial cancer is presented, focusing on patients with histopathologic endometrioid type of tumors. The different treatment modalities are described, and a management recommendation scheme is presented. Indications for surgical treatment depend on resectability, site and size of the tumor, and performance status of the patient. Indications for radiotherapy depend on the site of the recurrence and also on the initial therapy received. When considering systemic treatment for patients with recurrent endometrial cancer, it is important to take into account the general health status and condition of the patient as well as which prior therapy the patient has received. The treatments of choice for patients with hormone-sensitive tumors (positive receptor levels, low-grade tumors, and long disease-free interval) are progestagens as first-line treatment and tamoxifen as second-line treatment. Patients with high-grade tumors, negative hormone receptor levels, and short treatment-free interval are best treated with chemotherapy. Paclitaxel, doxorubicin, and cisplatin are the most active combination therapy for these patients but with significant toxicity. In phase II studies, the combination therapy with paclitaxel and carboplatin seems to be as effective but less toxic and can be administered in outpatient clinic. The literature on the management of patients with recurrent endometrial cancer is discussed in detail. The different sites of recurrent disease (ie, local, regional, and/or distant) are evaluated separately; management recommendations are proposed, and alternative approaches are given.


Assuntos
Carcinoma Endometrioide/terapia , Neoplasias do Endométrio/terapia , Recidiva Local de Neoplasia/terapia , Feminino , Humanos
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