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1.
Virchows Arch ; 2023 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-37938322

RESUMO

The primary aim of this study was to assess the association between human papilloma virus (HPV) and p53 expression and local recurrence (LR), disease specific survival (DSS), and overall survival (OS) in patients with vulvar squamous cell carcinoma (VSCC). Secondary, the accuracy of p16 immunohistochemistry for HPV status was assessed. The tumor tissue of 255 patients, surgically treated for primary unifocal VSCC between 2000 and 2010, was analyzed. HPV-PCR and P16 and p53 immunohistochemical stainings were performed. All histologic slides were independently reviewed by two expert gyneco-pathologists. Time to first LR, DSS, and OS for the variables p16, p53, and HPV-PCR were compared using univariable and multivariable Cox-regression analyses. In 211/255 (83.5%) patients, HPV-PCR was negative. The local recurrence rate was significantly lower in patients positive with HPV-PCR (10-year LR rate 24.6%) versus negative tumors (47.5%), p = 0.004. After multivariable analyses, this difference remained significant (HR 0.23 (95% CI 0.08-0.62) p = 0.004). There was no difference in LR rate correlated to the p53 expression. DSS and OS did not significantly differ after multivariable analyses for all different subgroups. Sensitivity and specificity of p16 staining for presence of HPV detected by HPV-PCR were 86.4% and 93.8%, respectively. In conclusion, patients with HPV-negative VSCCs have significantly more LR compared to patients with HPV-positive VSCCs, and p16 immunohistochemistry is a reliable surrogate marker for HPV status. No relevant subgroup for LR or survival based on HPV/p53 status could be identified. We advise to perform an HPV-PCR or p16 IHC staining in all patients with VSCC.

2.
Sci Total Environ ; 859(Pt 1): 160132, 2023 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-36400291

RESUMO

The present study employed data collected during the Mycosands survey to investigate the environmental factors influencing yeasts and molds distribution along European shores applying a species distribution modelling approach. Occurrence data were compared to climatic datasets (temperature, precipitation, and solar radiation), soil datasets (chemical and physical properties), and water datasets (temperature, salinity, and chlorophyll-a concentration) downloaded from web databases. Analyses were performed by MaxEnt software. Results suggested a different probability of distribution of yeasts and molds along European shores. Yeasts seem to tolerate low temperatures better during winter than molds and this reflects a higher suitability for the Northern European coasts. This difference is more evident considering suitability in waters. Both distributions of molds and yeasts are influenced by basic soil pH, probably because acidic soils are more favorable to bacterial growth. Soils with high nitrogen concentrations are not suitable for fungal growth, which, in contrast, are optimal for plant growth, favored by this environment. Finally, molds show affinity with soil rich in nickel and yeasts with soils rich in cadmium resulting in a distribution mainly at the mouths of European rivers or lagoons, where these metals accumulate in river sediments.


Assuntos
Rios , Poluentes do Solo , Rios/química , Solo/química , Cádmio/análise , Poluentes do Solo/análise , Metais/análise , Leveduras , Monitoramento Ambiental
3.
J Infect ; 83(6): 709-737, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34715239

RESUMO

Molecular diagnosis; Viral infection; Chemokines; Disease prognosis; CXCL10; CXCL11; CCL3; CCL4; CCL5; Random forest.


Assuntos
Quimiocina CXCL10 , Adulto , Criança , Humanos
4.
Sci Total Environ ; 781: 146598, 2021 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-33812107

RESUMO

The goal of most studies published on sand contaminants is to gather and discuss knowledge to avoid faecal contamination of water by run-offs and tide-retractions. Other life forms in the sand, however, are seldom studied but always pointed out as relevant. The Mycosands initiative was created to generate data on fungi in beach sands and waters, of both coastal and freshwater inland bathing sites. A team of medical mycologists and water quality specialists explored the sand culturable mycobiota of 91 bathing sites, and water of 67 of these, spanning from the Atlantic to the Eastern Mediterranean coasts, including the Italian lakes and the Adriatic, Baltic, and Black Seas. Sydney (Australia) was also included in the study. Thirteen countries took part in the initiative. The present study considered several fungal parameters (all fungi, several species of the genus Aspergillus and Candida and the genera themselves, plus other yeasts, allergenic fungi, dematiaceous fungi and dermatophytes). The study considered four variables that the team expected would influence the results of the analytical parameters, such as coast or inland location, urban and non-urban sites, period of the year, geographical proximity and type of sediment. The genera most frequently found were Aspergillus spp., Candida spp., Fusarium spp. and Cryptococcus spp. both in sand and in water. A site-blind median was found to be 89 Colony-Forming Units (CFU) of fungi per gram of sand in coastal and inland freshwaters, with variability between 0 and 6400 CFU/g. For freshwater sites, that number was 201.7 CFU/g (0, 6400 CFU/g (p = 0.01)) and for coastal sites was 76.7 CFU/g (0, 3497.5 CFU/g). For coastal waters and all waters, the median was 0 CFU/ml (0, 1592 CFU/ml) and for freshwaters 6.7 (0, 310.0) CFU/ml (p < 0.001). The results advocate that beaches should be monitored for fungi for safer use and better management.


Assuntos
Praias , Areia , Austrália , Mar Negro , Fungos , Humanos , Itália , Microbiologia da Água
5.
BMC Cancer ; 20(1): 539, 2020 Jun 09.
Artigo em Inglês | MEDLINE | ID: mdl-32517663

RESUMO

BACKGROUND: Cervical cancer is caused by Human Papilloma viruses (HPV) and is preceded by precursor stages: Cervical Intraepithelial Neoplasia (CIN). CIN is mostly found in women in their reproductive age and treated with a Loop Electrosurgical Excision Procedure (LEEP). The recurrence or residual disease rate after treatment is up to 17%. These women have a lifelong increased risk of recurrent CIN, cervical cancer and other HPV related malignancies. Furthermore, LEEP treatments are associated with complications such as premature birth. Limited data show that prophylactic HPV vaccination at the time of LEEP reduces recurrence rates, therefore leading to a reduction in repeated surgical interventions and side effect like preterm birth. The primary study objective is to evaluate the efficacy of the nonavalent HPV vaccination in women with a CIN II-III (high-grade squamous intraepithelial lesion (HSIL) lesion who will undergo a LEEP in preventing recurrent CIN II-III after 24 months. METHODS: This study is a randomised, double blinded, placebo controlled trial in 750 patients without prior HPV vaccination or prior treatment for CIN and with histologically proven CIN II-III (independent of their hrHPV status) for whom a LEEP is planned. Included patients will be randomised to receive either three injections with nonavalent (9 HPV types) HPV vaccine or placebo injections (NaCL 0.9%) as a comparator. Treatment and follow-up will be according the current Dutch guidelines. Primary outcome is recurrence of a CIN II or CIN III lesion at 24 months. A normal PAP smear with negative hrHPV test serves as surrogate for absence of CIN. At the start and throughout the study HPV typing, quality of life and cost effectiveness will be tested. DISCUSSION: Although prophylactic HPV vaccines are highly effective, little is known about the effectivity of HPV vaccines on women with CIN. Multiple LEEP treatments are associated with complications. We would like to evaluate the efficacy of HPV vaccination in addition to LEEP treatment to prevent residual or recurrent cervical dysplasia and decrease risks of repeated surgical treatment. TRIAL REGISTRATION: Medical Ethical Committee approval number: NL66775.078.18. Affiliation: Erasmus Medical Centre. Dutch trial register: NL 7938. Date of registration 2019-08-05.


Assuntos
Eletrocirurgia/métodos , Recidiva Local de Neoplasia/prevenção & controle , Infecções por Papillomavirus/prevenção & controle , Vacinas contra Papillomavirus/administração & dosagem , Ensaios Clínicos Controlados Aleatórios como Assunto , Displasia do Colo do Útero/cirurgia , Neoplasias do Colo do Útero/cirurgia , Adulto , Fatores Etários , Alphapapillomavirus/imunologia , Método Duplo-Cego , Feminino , Humanos , Pessoa de Meia-Idade , Estudos Multicêntricos como Assunto , Infecções por Papillomavirus/complicações , Tamanho da Amostra , Neoplasias do Colo do Útero/patologia , Neoplasias do Colo do Útero/virologia , Adulto Jovem , Displasia do Colo do Útero/patologia , Displasia do Colo do Útero/virologia
6.
J Antimicrob Chemother ; 75(9): 2582-2586, 2020 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-32516368

RESUMO

BACKGROUND: The voriconazole and echinocandin combination has been found to be synergistic in vitro and in vivo against most Aspergillus fumigatus isolates, both with a WT azole phenotype and an azole-resistant phenotype. The interaction between isavuconazole and echinocandins is less well studied. This is especially true for azole-resistant isolates. OBJECTIVES: We investigated the in vitro interaction between isavuconazole and anidulafungin for 30 A. fumigatus isolates including 18 azole-resistant isolates with various isavuconazole resistance phenotypes. METHODS: The isavuconazole/anidulafungin interaction was studied by using an adapted EUCAST-based 2D (12 × 8) chequerboard broth microdilution colorimetric assay using XTT. The interaction was analysed by FIC index (FICi) analysis and Bliss independence (BI) interaction analysis. RESULTS: Both the FICi analysis and the BI analysis showed synergistic interaction between isavuconazole and anidulafungin for the majority of WT and azole-resistant isolates. As we did not see significant beneficial effects of combination therapy in TR46/Y121F/T289A isolates at clinically achievable drug concentrations, it is unlikely that TR46/Y121F/T289A infections would benefit from isavuconazole and anidulafungin combination therapy. CONCLUSIONS: In regions with high azole resistance rates this combination may benefit patients with WT disease, azole-resistant invasive aspergillosis and those with mixed azole-susceptible and azole-resistant infection, but may not be beneficial for aspergillosis due to isolates with high isavuconazole resistance, such as TR46/Y121F/T289A isolates.


Assuntos
Aspergillus fumigatus , Azóis , Anidulafungina , Antifúngicos/farmacologia , Antifúngicos/uso terapêutico , Aspergillus fumigatus/genética , Azóis/farmacologia , Farmacorresistência Fúngica , Proteínas Fúngicas , Humanos , Testes de Sensibilidade Microbiana , Nitrilas , Piridinas , Triazóis
7.
Sci Rep ; 10(1): 2619, 2020 02 14.
Artigo em Inglês | MEDLINE | ID: mdl-32060342

RESUMO

We observed an increase in methicillin-susceptible Staphylococcus aureus (MSSA) infections at a Dutch neonatal intensive care unit. Weekly neonatal MSSA carriage surveillance and cross-sectional screenings of health care workers (HCWs) were available for outbreak tracing. Traditional clustering of MSSA isolates by spa typing and Multiple-Locus Variable number tandem repeat Analysis (MLVA) suggested that nosocomial transmission had contributed to the infections. We investigated whether whole-genome sequencing (WGS) of MSSA surveillance would provide additional evidence for transmission. MSSA isolates from neonatal infections, carriage surveillance, and HCWs were subjected to WGS and bioinformatic analysis for identification and localization of high-quality single nucleotide polymorphisms, and in-depth analysis of subsets of isolates. By measuring the genetic diversity in background surveillance, we defined transmission-level relatedness and identified isolates that had been unjustly assigned to clusters based on MLVA, while spa typing was concordant but of insufficient resolution. Detailing particular subsets of isolates provided evidence that HCWs were involved in multiple outbreaks, yet it alleviated concerns about one particular HCW. The improved resolution and accuracy of genomic outbreak analyses substantially altered the view on outbreaks, along with apposite measures. Therefore, inclusion of the circulating background population has the potential to overcome current issues in genomic outbreak inference.


Assuntos
Infecção Hospitalar/epidemiologia , Staphylococcus aureus Resistente à Meticilina/genética , Repetições Minissatélites , Infecções Estafilocócicas/epidemiologia , Técnicas de Tipagem Bacteriana , Infecção Hospitalar/microbiologia , Infecção Hospitalar/transmissão , Estudos Transversais , Surtos de Doenças , Humanos , Recém-Nascido , Unidades de Terapia Intensiva Neonatal , Staphylococcus aureus Resistente à Meticilina/isolamento & purificação , Epidemiologia Molecular , Polimorfismo de Nucleotídeo Único , Infecções Estafilocócicas/microbiologia , Infecções Estafilocócicas/transmissão , Sequenciamento Completo do Genoma
8.
Fungal Genet Biol ; 132: 103254, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31326470

RESUMO

Opportunistic fungal pathogens can cause a diverse range of diseases in humans. The increasing rate of fungal infections caused by strains that are resistant to commonly used antifungals results in difficulty to treat diseases, with accompanying high mortality rates. Existing and newly emerging molecular resistance mechanisms rapidly spread in fungal populations and need to be monitored. Fungi exhibit a diversity of mechanisms to maintain physiological resilience and create genetic variation; processes which eventually lead to the selection and spread of resistant fungal pathogens. To prevent and anticipate this dispersion, the role of evolutionary factors that drive fungal adaptation should be investigated. In this review, we provide an overview of resistance mechanisms against commonly used antifungal compounds in the clinic and for which fungal resistance has been reported. Furthermore, we aim to summarize and elucidate potent generators of genetic variability across the fungal kingdom that aid adaptation to stressful environments. This knowledge can lead to recognizing potential niches that facilitate fast resistance development and can provide leads for new management strategies to battle the emerging resistant populations in the clinic and the environment.


Assuntos
Adaptação Fisiológica , Antifúngicos/farmacologia , Farmacorresistência Fúngica , Fungos/efeitos dos fármacos , Micoses/microbiologia , Variação Genética , Humanos , Testes de Sensibilidade Microbiana , Mutação , Micoses/tratamento farmacológico , Estresse Fisiológico
9.
Clin Microbiol Infect ; 25(7): 799-806, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30580035

RESUMO

BACKGROUND: Triazole resistance in Aspergillus fumigatus is widespread and threatens first-line triazole therapy in patients with Aspergillus diseases. OBJECTIVES: To give an overview of the microbiology, epidemiology and clinical significance of triazole resistance in aspergillosis. SOURCES: PubMed search for articles on resistance in Aspergillus species. CONTENT: Triazoles are not mutagenic but select resistance when spontaneous mutations occur that are better able to proliferate in the triazole-containing environment. The major target for resistance mutations involves the Cyp51A gene, encoding an enzyme involved in cell wall synthesis. Triazole-resistance selection environments include patient treatment and organic matter containing triazole fungicide residues. Reported resistance frequencies vary widely between countries and hospitals, and resistance significantly complicates the diagnosis and treatment of Aspergillus diseases. Cultures may harbour various resistance phenotypes and multiple colonies must be analysed to detect resistance. PCR tests have become available for resistance detection in culture-negative patients, but show limited sensitivity. Individuals with triazole-resistant invasive aspergillosis have a 21% higher day-42 mortality compared with triazole-susceptible infection, and to prevent excess mortality resistant cases require first-line therapy that covers resistance. The recent ESCMID-ECMM-ERS Aspergillus guideline recommends resistance testing in A. fumigatus and local resistance surveillance. If resistance rates exceed 10% liposomal amphotericin B or triazole and echinocandin first-line therapy should be considered. IMPLICATIONS: Triazole resistance significantly complicates the management of aspergillosis and multidisciplinary research from a 'One-health' perspective is required to retain the triazole class for medical use.


Assuntos
Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Farmacorresistência Fúngica/genética , Triazóis/farmacologia , Aspergilose/tratamento farmacológico , Aspergilose/epidemiologia , Aspergillus fumigatus/genética , Gerenciamento Clínico , Humanos , Infecções Fúngicas Invasivas/tratamento farmacológico , Testes de Sensibilidade Microbiana , Mutação , Reação em Cadeia da Polimerase , Triazóis/uso terapêutico
10.
Gynecol Oncol ; 149(2): 310-317, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29555332

RESUMO

BACKGROUND: Two etiologic pathways for vulvar squamous cell carcinoma (SCC) are described: in a background of lichen sclerosus and/or differentiated vulvar intraepithelial neoplasia and related to high-risk human papillomavirus (HPV) infection with high grade squamous intraepithelial lesion (HSIL) as precursor. The aim was to compare the predilection site and survival of HPV-related to non HPV-related vulvar SCCs. METHODS: Data of patients treated for primary vulvar SCC at the Radboudumc between March 1988 and January 2015 were analyzed. All histological specimens were tested for HPV with the SPF10/DEIA/LiPA25 system assay and p16INK4a staining was performed using CINtec® histology kit. Vulvar SCCs were considered HPV-related in case of either >25% p16INK4a expression and HPV positivity or >25% p16INK4a expression and HSIL next to the tumor without HPV positivity. Tumor localization, disease specific survival (DSS), disease free survival (DFS) and overall survival (OS) of patients with HPV-related and non HPV-related vulvar SCC were compared. RESULTS: In total 318 patients were included: 55 (17%) had HPV-related (Group 1) and 263 (83%) had non HPV-related vulvar SCC (Group 2). Tumors in Group 1 were significantly more often located at the perineum compared to Group 2, 30% and 14%, respectively (p=0.001). The DSS, DFS and OS were significantly better in HPV-related than in non HPV-related vulvar SCC patients. CONCLUSION: HPV-related vulvar SCCs are more frequently located at the perineum and have a favorable prognosis compared to non HPV-related vulvar SCCs. Both localization and HPV-relation could explain this favorable prognosis. HPV-related vulvar SCC seems to be a separate entity.


Assuntos
Infecções por Papillomavirus/patologia , Líquen Escleroso Vulvar/patologia , Neoplasias Vulvares/patologia , Neoplasias Vulvares/virologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma in Situ/patologia , Carcinoma in Situ/virologia , Carcinoma de Células Escamosas/patologia , Carcinoma de Células Escamosas/virologia , Intervalo Livre de Doença , Feminino , Humanos , Pessoa de Meia-Idade , Papillomaviridae/isolamento & purificação , Prognóstico
11.
J Antimicrob Chemother ; 73(5): 1389-1394, 2018 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-29394399

RESUMO

Objectives: To investigate the epidemiology and clinical relevance of triazole resistance among patients undergoing treatment for haematological malignancies who are at risk of invasive aspergillosis (IA). Methods: This was a retrospective cohort study for which the records of consecutive patients given chemotherapy for AML or myelodysplastic syndrome (MDS) or who had received an allogeneic HSCT from 2006 to 2012 were reviewed for IA. Triazole resistance was detected by the VIPcheck™ screening method and confirmed by determining the MIC by EUCAST methodology. Results: A total of 432 patients were included, comprising 182 (42.1%) patients who had undergone chemotherapy for AML or MDS, and 250 (57.9%) patients who had undergone an allogeneic HSCT. Probable or proven IA was diagnosed in 36 cases (8.3%, 95% CI 6.0%-11.4%). Of these, 12 (33.3%) were based on recovery of Aspergillus fumigatus from sputum, bronchoalveolar lavage or biopsy, and triazole resistance was found in 2 instances. A. fumigatus was also recovered from one or more specimens from 13 patients without probable or proven IA. Triazole resistance was documented for three patients. The survival rate of patients with IA caused by voriconazole-resistant isolates could not be assessed. Conclusions: The overall frequency of voriconazole-resistant IA among patients at high risk was low. However, the rate of triazole resistance may have been underestimated by the low detection rate based on recovery of A. fumigatus. Alternative diagnostic tests, such as PCR-based assays, may prove better at detecting IA due to triazole-resistant A. fumigatus.


Assuntos
Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Farmacorresistência Fúngica , Aspergilose Pulmonar Invasiva/epidemiologia , Triazóis/farmacologia , Aspergillus fumigatus/isolamento & purificação , Neoplasias Hematológicas/complicações , Humanos , Testes de Sensibilidade Microbiana , Prevalência , Estudos Retrospectivos
12.
Artigo em Inglês | MEDLINE | ID: mdl-28923874

RESUMO

Antifungal susceptibility testing is an essential tool for guiding therapy, although EUCAST and CLSI reference methods are often available only in specialized centers. We studied the performance of an agar-based screening method for the detection of azole resistance in Aspergillus fumigatus cultures. The VIPcheck consists of four wells containing voriconazole, itraconazole, posaconazole, or a growth control. Ninety-six A. fumigatus isolates were used. Thirty-three isolates harbored a known resistance mechanism: TR34/L98H (11 isolates), TR46/Y121F/T289A (6 isolates), TR53 (2 isolates), and 14 isolates with other cyp51A gene point mutations. Eighteen resistant isolates had no cyp51A-mediated azole resistance. Forty-five isolates had a wild-type (WT) azole phenotype. Four technicians and two inexperienced interns, blinded to the genotype/phenotype, read the plates visually after 24 h and 48 h and documented minimal growth, uninhibited growth, and no growth. The performance was compared to the EUCAST method. After 24 h of incubation, the mean sensitivity and specificity were 0.54 and 1.00, respectively, with uninhibited growth as the threshold. After 48 h of incubation, the performance mean sensitivity and specificity were 0.98 and 0.93, respectively, with minimal growth. The performance was not affected by observer experience in mycology. The interclass correlation coefficient was 0.87 after 24 h and 0.85 after 48 h. VIPcheck enabled the selection of azole-resistant A. fumigatus colonies, with a mean sensitivity and specificity of 0.98 and 0.93, respectively. Uninhibited growth on any azole-containing well after 24 h and minimal growth after 48 h were indicative of resistance. These results indicate that the VIPcheck is an easy-to-use tool for azole resistance screening and the selection of colonies that require MIC testing.


Assuntos
Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Sistema Enzimático do Citocromo P-450/genética , Farmacorresistência Fúngica/genética , Proteínas Fúngicas/genética , Itraconazol/farmacologia , Triazóis/farmacologia , Voriconazol/farmacologia , Aspergillus fumigatus/isolamento & purificação , Genótipo , Humanos , Testes de Sensibilidade Microbiana
13.
Prev Med ; 101: 96-101, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28579497

RESUMO

In 2017 the cervical cancer screening program in The Netherlands will be revised. Cervical smears will primarily be tested for the presence of high-risk human papillomavirus (hrHPV) instead of cytology, and vaginal self-sampling will be offered to non-responders. This includes a potential risk that part of the women who would otherwise opt for a cervical smear will wait for self-sampling. However, self-sampling for hrHPV in a responder population has never been studied yet. The aim of this study was to investigate the applicability and accuracy of self-sampling in detecting hrHPV in a screening responder population. A total of 2049 women, aged 30-60years, participating in the screening program in The Netherlands were included from April 2013 to May 2015. After they had their cervical smear taken, women self-collected a cervicovaginal sample with a brush-based device, the Evalyn Brush. Both the cervical smear and self-sample specimen were tested with the COBAS 4800 HPV platform. The hrHPV prevalence was 8.0% (95% CI 6.9-9.2) among the physician-taken samples, and 10.0% (95% CI 8.7-11.3) among the self-samples. There was 96.8% (95% CI 96.0-97.5) concordance of hrHPV prevalence between self-samples and physician-taken samples. Women in our study evaluated self-sampling as convenient (97.1%), user-friendly (98.5%), and 62.8% preferred self-sampling over a physician-taken sampling for the next screening round. In conclusion, self-sampling showed high concordance with physician-taken sampling for hrHPV detection in a responder screening population and highly acceptable to women. Implementation of HPV-self-sampling for the responder population as a primary screening tool may be considered.


Assuntos
Detecção Precoce de Câncer/métodos , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/diagnóstico , Esfregaço Vaginal/métodos , Adulto , Feminino , Humanos , Países Baixos , Médicos , Autorrelato , Manejo de Espécimes/métodos , Inquéritos e Questionários , Neoplasias do Colo do Útero/diagnóstico
14.
J Antimicrob Chemother ; 72(9): 2548-2552, 2017 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-28605488

RESUMO

Background: F901318 is a new antifungal agent with a novel mechanism of action with activity against Aspergillus species. We investigated the in vitro activity of F901318 against a collection of Aspergillus isolates. Methods: A total of 213 Aspergillus isolates were used in this study. A total of 143 Aspergillus fumigatus sensu stricto isolates were used, of which 133 were azole resistant [25 TR34/L98H; 25 TR46/Y121F/T289A; 33 A. fumigatus with cyp51A-associated point mutations (25 G54, 1 G432 and 7 M220); and 50 azole-resistant A. fumigatus without known resistance mechanisms]. Ten azole-susceptible A. fumigatus isolates were used as WT controls. The in vitro activity was also determined against Aspergillus calidoustus (25 isolates), Aspergillus flavus (10), Aspergillus nidulans (10) and Aspergillus tubingensis (25). F901318 activity was compared with that of itraconazole, voriconazole, posaconazole, isavuconazole, amphotericin B and anidulafungin. Minimum effective concentrations and MICs were determined using the EUCAST broth microdilution method. Results: F901318 was active against all tested isolates: A. fumigatus WT, MIC90 0.125 mg/L (range 0.031-0.125); TR34/L98H,TR46/Y121F/T289A and azole resistant without known resistance mechanisms, MIC90 0.125 mg/L (range 0.031-0.25); A. fumigatus with cyp51A-associated point mutations, MIC90 0.062 mg/L (range 0.015-0.125); and other species, A. calidoustus MIC90 0.5 mg/L (range 0.125-0.5), A. flavus MIC90 0.062 mg/L (range 0.015-0.62), A. nidulans MIC90 0.125 mg/L (range 0.062-0.25) and A. tubingensis MIC90 0.062 mg/L (range 0.015-0.25). Conclusions: F901318 showed potent and consistent in vitro activity against difficult-to-treat Aspergillus spp. with intrinsic and acquired antifungal resistance due to known and unknown resistance mechanisms, suggesting no significant implications of azole resistance mechanisms for the mode of action of F901318.


Assuntos
Acetamidas/farmacologia , Antifúngicos/farmacologia , Aspergillus fumigatus/efeitos dos fármacos , Aspergillus/efeitos dos fármacos , Aspergilose Pulmonar Invasiva/microbiologia , Piperazinas/farmacologia , Pirimidinas/farmacologia , Pirróis/farmacologia , Aspergillus/genética , Aspergillus fumigatus/genética , Aspergillus fumigatus/isolamento & purificação , Sistema Enzimático do Citocromo P-450/genética , Farmacorresistência Fúngica/genética , Proteínas Fúngicas/genética , Genótipo , Humanos , Aspergilose Pulmonar Invasiva/tratamento farmacológico , Itraconazol/farmacologia , Testes de Sensibilidade Microbiana , Nitrilas/farmacologia , Mutação Puntual , Piridinas/farmacologia , Triazóis/farmacologia , Voriconazol/farmacologia
15.
Clin Otolaryngol ; 42(3): 681-686, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27882657

RESUMO

OBJECTIVES: The aim of this study was to assess the feasibility of testing actionable mutations in small amounts of formalin-fixed paraffin-embedded material in multiple genes of the receptor tyrosine kinase pathway and to determine the frequency of these mutations in human papillomavirus (HPV)-positive and HPV-negative oropharyngeal cancer (OPC). DESIGN: A retrospective pilot study was performed. SETTING: In OPC, no predictive markers for response to epidermal growth factor receptor inhibition are known. Therefore, identifying predictive biomarkers is of utmost importance, but is often hampered by the small amount of tumour material available. PARTICIPANTS: We included the archival material of 45 OPC, all treated with concomitant chemoradiotherapy between 2003 and 2010. MAIN OUTCOME MEASURES: Besides the HPV status, we assessed mutations using a gene panel that targets 16 genes in the receptor tyrosine kinase pathway and six other genes. The polymerase chain reaction required only 10 ng DNA. RESULTS: In total, 42 of the 45 biopsies have been successfully analysed. In total 20 of 42 samples were HPV-positive and 22 of 42 were HPV-negative. In the receptor tyrosine kinase pathway, mutations in PIK3CA were most frequently identified. A TP53 mutation was identified in one HPV-positive sample and in 13 HPV-negative samples. Additionally, three mutations in three different genes were found. CONCLUSIONS: We evaluated an assay to identify mutations in the receptor tyrosine kinase pathway. As only small amounts of formalin-fixed paraffin-embedded material are sufficient for reliable analysis, this test opens up new possibilities for personalised medicine.


Assuntos
Carcinoma de Células Escamosas/genética , DNA Viral/genética , Mutação , Neoplasias Orofaríngeas/genética , Infecções por Papillomavirus/genética , Fosfatidilinositol 3-Quinases/genética , Adulto , Idoso , Carcinoma de Células Escamosas/terapia , Carcinoma de Células Escamosas/virologia , Quimiorradioterapia , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Orofaríngeas/terapia , Neoplasias Orofaríngeas/virologia , Infecções por Papillomavirus/terapia , Infecções por Papillomavirus/virologia , Fosfatidilinositol 3-Quinases/metabolismo , Projetos Piloto , Reação em Cadeia da Polimerase em Tempo Real , Estudos Retrospectivos
16.
Am J Transplant ; 17(6): 1563-1573, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28009475

RESUMO

Female renal transplant recipients (RTRs) have an increased risk for developing human papillomavirus (HPV)-related (pre)malignant lesions of the genital tract. This study aims to assess the genital prevalence of HPV before and after renal transplantation (RT). In female patients who were counseled for RT at the Radboud University Medical Center Nijmegen, the Netherlands, gynecological examination was performed at first visit, and 1 and 2 years later. HPV self-sampling and questionnaires on sexual behavior were performed every 3 months. In 65 patients who underwent RT, the high-risk human papillomavirus (hrHPV) prevalence as assessed with the highly sensitive SPF10 -LiPA25 test increased significantly from 19% before to 31% after RT (p = 0.045). Based upon the clinically validated Cobas 4800 HPV test, the hrHPV prevalence increased from 10% before to 14% after RT (p = 0.31). During follow-up, no changes in sexual behavior were reported. Thirty-three patients who did not undergo RT showed a hrHPV prevalence of 21% at study entry and of 27% after 12 months with the sensitive test, and a stable prevalence of 16% with the clinically validated test. The results of this study indicate that activation of latent HPV infections may contribute to the increased risk of HPV-related (pre)malignant lesions in female RTRs.


Assuntos
Falência Renal Crônica/virologia , Transplante de Rim/métodos , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/epidemiologia , Ativação Viral , Adulto , Idoso , Feminino , Seguimentos , Taxa de Filtração Glomerular , Humanos , Falência Renal Crônica/cirurgia , Testes de Função Renal , Masculino , Pessoa de Meia-Idade , Países Baixos/epidemiologia , Infecções por Papillomavirus/virologia , Prevalência , Prognóstico , Fatores de Risco , Comportamento Sexual , Transplantados , Adulto Jovem
17.
BJOG ; 123(1): 59-66, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26177672

RESUMO

BACKGROUND: Studies of see-and-treat management of cervical intraepithelial neoplasia (CIN) vary in their inclusion criteria, resulting in a broad range of overtreatment rates. OBJECTIVES: To determine overtreatment rates in see-and-treat management of women referred for colposcopy because of suspected CIN, in order to define circumstances supporting see-and-treat management. SEARCH STRATEGY: MEDLINE, EMBASE, and the Cochrane Library were searched from inception up to 12 May 2014. SELECTION CRITERIA: Studies of see-and-treat management in women with a reported cervical smear result, colposcopic impression, and histology result were included. DATA COLLECTION AND ANALYSIS: Methodological quality was assessed with the Newcastle-Ottawa scale. We used the inverse variance method for pooling incidences, and a random-effects model was used to account for heterogeneity between studies. Overtreatment was defined as treatment in patients with no CIN or CIN1. MAIN RESULTS: Thirteen studies (n = 4611) were included. The overall overtreatment rate in women with a high-grade cervical smear and a high-grade colposcopic impression was 11.6% (95% CI 7.8-15.3%). The overtreatment rate in women with a high-grade cervical smear and low-grade colposcopic impression was 29.3% (95% CI 16.7-41.9%), and in the case of a low-grade smear and high-grade colposcopic impression it was 46.4% (95% CI 15.7-77.1%). In women with a low-grade smear and low-grade colposcopic impression, the overtreatment rate was 72.9% (95% CI 68.1-77.7%). AUTHOR'S CONCLUSIONS: The pooled overtreatment rate in women with a high-grade smear and high-grade colposcopic impression is at least comparable with the two-step procedure, which supports the use of see-and-treat management in this subgroup of women. TWEETABLE ABSTRACT: See-and-treat management is justified in the case of a high-grade smear and a high-grade colposcopic impression.


Assuntos
Colo do Útero/patologia , Colposcopia/estatística & dados numéricos , Eletrocirurgia/métodos , Encaminhamento e Consulta/estatística & dados numéricos , Displasia do Colo do Útero/patologia , Neoplasias do Colo do Útero/patologia , Adulto , Idoso , Feminino , Humanos , Incidência , Pessoa de Meia-Idade , Neoplasias do Colo do Útero/cirurgia , Esfregaço Vaginal , Displasia do Colo do Útero/cirurgia
18.
Eur J Cancer ; 52: 77-84, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26655558

RESUMO

PURPOSE: To study the feasibility of induction chemotherapy added to concomitant cisplatin-based chemoradiotherapy (CRT) in patients with locally advanced head and neck cancer (LAHNC). PATIENTS AND METHODS: LAHNC patients were treated with 4 courses of docetaxel/cisplatin/5-fluorouracil (TPF) followed by randomization to either cisplatin 100 mg/m(2) with conventional radiotherapy (cis100 + RT) or cisplatin 40 mg/m(2) weekly with accelerated radiotherapy (cis40 + ART). Primary endpoint was feasibility, defined as receiving ≥ 90% of the scheduled total radiation dose. Based on power analysis 70 patients were needed. RESULTS: 65 patients were enrolled. The data safety monitoring board advised to prematurely terminate the study, because only 22% and 41% (32% in total) of the patients treated with cis100 + RT (n = 27) and cis40 + ART (n = 29) could receive the planned dose cisplatin during CRT, respectively, even though the primary endpoint was reached. Most common grade 3-4 toxicity was febrile neutropenia (18%) during TPF and dehydration (26% vs 14%), dysphagia (26% vs 24%) and mucositis (22% vs 57%) during cis100 + RT and cis40 + ART, respectively. For the patients treated with cis100 + RT and cis40 + ART, two years progression free survival and overall survival were 70% and 78% versus 72% and 79%, respectively. CONCLUSION: After TPF induction chemotherapy, cisplatin-containing CRT is not feasible in LAHNC patients, because the total planned cisplatin dose could only be administered in 32% of the patients due to toxicity. However, all but 2 patients received more than 90% of the planned radiotherapy. Clinical Trials Information: NCT00774319.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Quimiorradioterapia/métodos , Cisplatino/uso terapêutico , Fluoruracila/uso terapêutico , Neoplasias de Cabeça e Pescoço/terapia , Taxoides/uso terapêutico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Quimiorradioterapia/efeitos adversos , Quimiorradioterapia/mortalidade , Cisplatino/efeitos adversos , Progressão da Doença , Intervalo Livre de Doença , Docetaxel , Término Precoce de Ensaios Clínicos , Estudos de Viabilidade , Feminino , Fluoruracila/efeitos adversos , Neoplasias de Cabeça e Pescoço/mortalidade , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Quimioterapia de Indução , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Recidiva Local de Neoplasia , Países Baixos , Dosagem Radioterapêutica , Fatores de Risco , Taxoides/efeitos adversos , Fatores de Tempo , Resultado do Tratamento
19.
Emerg Infect Dis ; 21(6): 1041-4, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25988348

RESUMO

To investigate azole resistance in clinical Aspergillus isolates, we conducted prospective multicenter international surveillance. A total of 3,788 Aspergillus isolates were screened in 22 centers from 19 countries. Azole-resistant A. fumigatus was more frequently found (3.2% prevalence) than previously acknowledged, causing resistant invasive and noninvasive aspergillosis and severely compromising clinical use of azoles.


Assuntos
Antifúngicos/farmacologia , Aspergilose/epidemiologia , Aspergilose/microbiologia , Aspergillus fumigatus/efeitos dos fármacos , Azóis/farmacologia , Farmacorresistência Fúngica , Vigilância da População , Aspergillus fumigatus/genética , Humanos , Testes de Sensibilidade Microbiana , Mutação , Prevalência , Estudos Prospectivos
20.
Am J Transplant ; 15(3): 723-33, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25675976

RESUMO

Immunosuppressive treatment of organ transplant recipients is associated with an increase in the occurrence of human papillomavirus (HPV) related anogenital (pre)malignancies. This cohort study investigated the genotype-specific prevalence of HPV infections in a large cohort of female renal transplant recipients (RTRs). Participants self-collected a cervicovaginal sample for detection and genotyping of HPV. Besides, they completed a questionnaire regarding sociodemographic variables, medical data and sexual behavior. Anogenital screening was offered to all HPV-positive participants. A total number of 218 female RTRs was included. The prevalence of mucosal HPV infections was 27.1% and 17.4% for high risk HPV in particular. The studied cohort showed a broad range of HPV genotypes and multiple HPV genotypes were found in 27.1% of HPV-positive patients. Seven participants were identified with occult premalignant anogenital lesions. In conclusion, this study shows a high point-prevalence of HPV in female RTRs (age-matched West-European general population: 9-10%) with a shift in the distribution of genotypes as compared with the general population. Moreover, a substantial number of patients with occult premalignancies was identified. The introduction of self-sampling for HPV positivity can help in early detection of (pre)malignant anogenital lesions in this vulnerable population.


Assuntos
Colo do Útero/virologia , Transplante de Rim , Infecções por Papillomavirus/complicações , Vagina/virologia , Estudos de Coortes , Feminino , Humanos
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