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1.
Med Lav ; 110(2): 93-101, 2019 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-30990471

RESUMO

BACKGROUND: Current Italian regulations and procedures for surface decontamination of antineoplastic drugs (ADs) are not clear. Therefore, most hospital pharmacies follow internal procedures as an interpretation of the recommended handling guidelines. OBJECTIVES: Our study compared 7 different cleaning procedures after controlled contamination of the work surface of a biological safety cabinet workbench in an Italian hospital oncology pharmacy (HOP) to determine which of them is more efficient and practical. Moreover, in order to approximate operative routine and improve risk awareness, cleaning procedures were carried out by the personnel that usually operate in the HOP. METHODS: Measured quantities, i.e. a drop (100 µL) of 5-FluoroUracil, IPhosfamide, CycloPhosphamide and Gemcitabine, were deposited on the work surface within precisely delimited areas. Following the wipe-test analysis using UPLC-MS/MS, the cleaning efficacy was calculated based on the ratio of the residual concentration of the AD, after the cleaning procedure, to the concentration of each AD before the procedure. RESULTS: Tested cleaning procedures were: 1) Hypo-Chlor®, hot water and Farmecol70®; 2) Hypo-Chlor® and hot water; 3) Farmecol70®; 4) Surfa'Safe SH® and hot water; 5) Amuchina® 10%, hot water and Farmecol70®; 6) Incidin® Oxyfoam and hot water; 7) liquid Marseille soap, hot water and Farmecol70®. Within the studied HOP, the Marseille soap was evaluated to be the optimal choice due to its efficacy, low cost, and the very short contact time needed before rinsing. DISCUSSION: The application of the protocol for procedure validation suggested here could be used in every HOP as a reliable industrial hygiene tool to demonstrate the validity of the chosen cleaning procedure.


Assuntos
Antineoplásicos , Exposição Ocupacional , Saúde Ocupacional , Serviço de Farmácia Hospitalar , Cromatografia Líquida , Descontaminação , Contaminação de Equipamentos , Itália , Espectrometria de Massas em Tandem
2.
Plants (Basel) ; 13(8)2024 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-38674473

RESUMO

Orchids are experiencing wide success in ornamental, medicinal, and food fields. The reason for their success is correlated with both their morphology and metabolomics, the latter linked to their taste and biological effects. Despite many orchids having already been the subject of chemotaxonomic works, some of them are still untapped, like the case of Orchis purpurea. O. purpurea is one of the most common species of the genus Orchis, present in hedgerows, verges, and light woodland, where it is one of the few herbaceous plants able to be unpleasant to herbivorous animals. Essential oil from roots, stems, leaves, and flowers were analyzed via GC/MS analyses, revealing the presence of 70 compounds, with a clear prevalence of coumarin. The high concentration of this metabolite may explain the resistance of O. purpurea to herbivores, being associated with appetite-suppressing properties and a bitter taste. Non-volatile fractions were analyzed via UHPLC-MS analysis revealing the presence of hydroxycinnamic acid derivatives, polyphenols, and glycosidic compounds, probably responsible for their color and fragrance. Taken together, the herein presented results shed light on both the defensive strategy and the chemotaxonomy of O. purpurea.

3.
Int J Nanomedicine ; 19: 4263-4278, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38766663

RESUMO

Introduction: Photodynamic Therapy (PDT) is a promising, minimally invasive treatment for cancer with high immunostimulatory potential, no reported drug resistance, and reduced side effects. Indocyanine Green (ICG) has been used as a photosensitizer (PS) for PDT, although its poor stability and low tumor-target specificity strongly limit its efficacy. To overcome these limitations, ICG can be formulated as a tumor-targeting nanoparticle (NP). Methods: We nanoformulated ICG into recombinant heavy-ferritin nanocages (HFn-ICG). HFn has a specific interaction with transferrin receptor 1 (TfR1), which is overexpressed in most tumors, thus increasing HFn tumor tropism. First, we tested the properties of HFn-ICG as a PS upon irradiation with a continuous-wave diode laser. Then, we evaluated PDT efficacy in two breast cancer (BC) cell lines with different TfR1 expression levels. Finally, we measured the levels of intracellular endogenous heavy ferritin (H-Fn) after PDT treatment. In fact, it is known that cells undergoing ROS-induced autophagy, as in PDT, tend to increase their ferritin levels as a defence mechanism. By measuring intracellular H-Fn, we verified whether this interplay between internalized HFn and endogenous H-Fn could be used to maximize HFn uptake and PDT efficacy. Results: We previously demonstrated that HFn-ICG stabilized ICG molecules and increased their delivery to the target site in vitro and in vivo for fluorescence guided surgery. Here, with the aim of using HFn-ICG for PDT, we showed that HFn-ICG improved treatment efficacy in BC cells, depending on their TfR1 expression. Our data revealed that endogenous H-Fn levels were increased after PDT treatment, suggesting that this defence reaction against oxidative stress could be used to enhance HFn-ICG uptake in cells, increasing treatment efficacy. Conclusion: The strong PDT efficacy and peculiar Trojan horse-like mechanism, that we revealed for the first time in literature, confirmed the promising application of HFn-ICG in PDT.


Assuntos
Neoplasias da Mama , Verde de Indocianina , Nanopartículas , Fotoquimioterapia , Fármacos Fotossensibilizantes , Feminino , Humanos , Antígenos CD/metabolismo , Apoferritinas/química , Neoplasias da Mama/terapia , Neoplasias da Mama/tratamento farmacológico , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Portadores de Fármacos/química , Portadores de Fármacos/farmacocinética , Ferritinas/química , Verde de Indocianina/química , Verde de Indocianina/farmacologia , Verde de Indocianina/uso terapêutico , Células MCF-7 , Nanopartículas/química , Fotoquimioterapia/métodos , Fármacos Fotossensibilizantes/farmacologia , Fármacos Fotossensibilizantes/química , Receptores da Transferrina/metabolismo
4.
ACS Omega ; 8(51): 48735-48741, 2023 Dec 26.
Artigo em Inglês | MEDLINE | ID: mdl-38162787

RESUMO

We investigated the relevance of encapsulation in H-ferritin nanocages (HFn) in determining an improved tumor-targeted delivery of indocyanine green (ICG). Since from previous experiments, the administration of HFn loaded with ICG (HFn-ICG) resulted in an increased fluorescence signal of ICG, our aim was to uncover if the nanoformulation could have a major role in driving a specific targeting of the dye to the tumor or rather a protective action on ICG's fluorescence. Here, we took advantage of a combined analysis involving ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) on murine tissue homogenates matched with fluorescence intensities analysis detected by ex vivo optical imaging. The quantification of ICG content performed on different organs over time combined with the fluorescent signal detection confirmed the superior delivery of ICG thanks to the nanoformulation. Our results showed that HFn-ICG drives a real accumulation at the tumor instead of only having a role in the preservation of ICG's fluorescence, further supporting its use as a delivery system of ICG for fluorescence-guided surgery applications in oncology.

5.
Plants (Basel) ; 11(6)2022 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-35336708

RESUMO

Orchidaceae is a flowering plant family worldwide distributed known for producing volatile organic compounds (VOCs) which can act as olfactory signals for pollinators. Despite the importance of VOCs in the different reproductive strategies, in the literature there are only a few publications on the characterization of orchids' volatile profiles. In this study, the essential oils from fresh inflorescences of sympatric orchids Anacamptis morio, Himantoglossum robertianum, Ophrys sphegodes and Orchis purpurea, naturally growing in Piedmont (Italy) were isolated by steam distillation and characterized by GC/FID and GC/MS. A number of compounds were identified, with a peculiar distribution in the species: alcohols (range 16.93-50.60%), from which p-cresol (range 12.75-38.10%) was the most representative compound; saturated hydrocarbons (range 5.81-59.29%), represented by pentacosane (range 2.22-40.17%) and tricosane (range 0.78-27.48%); long-chain monounsaturated hydrocarbons (range 0.29-5.20%) represented by 9-pentacosene, 11-tricosene, and 1-heneicosene. The structure of positional isomers in linear alkenes was elucidated by derivatization with dimethyl disulfide and MS fragmentation patterns. Coumarin (68.84%) was the dominant compound in O. purpurea and was detected in lower concentrations (range 0.21-0.26%) in the other taxa. These volatile compounds may represent a particular feature of these plant species and play an essential role in pollinator interaction.

6.
Artigo em Inglês | MEDLINE | ID: mdl-35329423

RESUMO

The high toxicity of antineoplastic drugs (ADs) makes them dangerous not only for patients, but also for exposed workers. Therefore, the aim of this review was to provide an updated overview of the biological monitoring of occupational AD exposure in order to extrapolate information useful to improve risk assessment and management strategies in workplaces. Several studies demonstrated that remarkable portions of healthcare workers may have traces of these substances or their metabolites in biological fluids, although with some conflicting results. Nurses, directly engaged in AD handling, were the occupational category at higher risk of contamination, although, in some cases, personnel not involved in AD-related tasks also showed quantifiable internal doses. Overall, further research carried out on greater sample sizes appears necessary to gain deeper insight into the variability retrieved in the reported results. This may be important to understand the impact of the extent of ADs use, different handling, procedures, and cleaning practices, spill occurrence, training of the workforce, as well as the adoption of adequate collective and personal protective equipment in affecting the occupational exposure levels. This may support the achievement of the greatest clinical efficiency of such therapies while assuring the health and safety of involved workers.


Assuntos
Antineoplásicos , Exposição Ocupacional , Antineoplásicos/análise , Monitoramento Biológico , Monitoramento Ambiental/métodos , Pessoal de Saúde , Humanos , Exposição Ocupacional/análise , Equipamento de Proteção Individual
7.
Artigo em Inglês | MEDLINE | ID: mdl-35886450

RESUMO

In the present study, surface contamination where antineoplastic drugs (ADs) are present was investigated, as occupational exposure risk is still an open debate. Despite recommendations and safety standard procedures being in place in health care settings, quantifiable levels of ADs are being reported in the recent literature. Thus, a survey monitoring program was conducted over five years (2016-2021) in nine Italian hospitals. The repeated surveys produced 8288 data points that have been grouped according to the main hospital settings, such as pharmacy areas and patient care units. Based on the most often prepared ADs, the investigated drugs were cyclophosphamide (CP), gemcitabine (GEM), 5-fluorouracil (5-FU), and platinum compounds (Pt). Patient care units had a frequency of positive wipe samples (59%) higher than pharmacies (44%). Conversely, pharmacies had a frequency of positive pad samples higher (24%) than patient care units (10%). Moreover, by statistical analysis, pad samples had a significantly higher risk of contamination in pharmacy areas than in patient care units. In this study, the 75th and the 90th percentiles of the contamination levels were obtained. The 90th percentile was chosen to describe a suitable benchmark that compares results obtained by the present research with those previously reported in the literature. Based upon surface contamination loads, our data showed that 5-FU had the highest concentration values, but the lowest frequency of positive samples. In pharmacy areas, the 90th percentile of 5-FU data distribution was less than 0.346 ng/cm2 and less than 0.443 ng/cm2 in patient care units. AD levels are higher than those reported for health care settings in other European countries yet trends of contamination in Italy have shown to decrease over time.


Assuntos
Antineoplásicos , Exposição Ocupacional , Antineoplásicos/análise , Monitoramento Ambiental/métodos , Contaminação de Equipamentos , Fluoruracila/análise , Hospitais , Humanos , Exposição Ocupacional/análise
8.
J Oncol Pharm Pract ; 17(4): 320-32, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20823049

RESUMO

In health care facilities, dermal contact and inhalation are considered to be the main routes of exposure to cytotoxic antineoplastic drugs (ADs). Hand-to-mouth contamination or accidental needle sticks as well as events due to inadequate disposal may also contribute to exposure. In order to measure the extent of contamination, biological and environmental monitoring are essential tools for routine testing. Moreover, reliable sampling and analytical procedures are required. During the last decade, several methods have been developed and validated. The appropriate analytical techniques were used to quantify even very low levels of some of the more commonly used ADs, such as cyclophosphamide, 5-fluoruracil, taxol, anthracyclines, and platinum-compounds. The main objective of this study is to assess the adherence to existing standards of practice through an effective monitoring program, including environmental and biological measurements. In seven hospitals located in Northern-Central Italy, periodic surveys were scheduled to verify continuing compliance with guidelines over a 5-year period. All biological samples were found to be below detection limits and a progressive, significant decrease in workplace contamination was observed. Our results confirm that a cost-effective monitoring regime, including fast and simple sample pre-treatment procedures, simultaneous determination of the analytes and their metabolites, validated procedures including uncertainty evaluation, and periodic surveys, is the adequate approach for the collection of reliable exposure data and hence for effective intervention.


Assuntos
Antineoplásicos/análise , Monitoramento Ambiental/normas , Fidelidade a Diretrizes/normas , Hospitais/normas , Exposição Ocupacional/normas , Garantia da Qualidade dos Cuidados de Saúde/normas , Antineoplásicos/efeitos adversos , Monitoramento Ambiental/métodos , Monitoramento Epidemiológico , Pessoal de Saúde/normas , Inquéritos Epidemiológicos/métodos , Humanos , Itália/epidemiologia , Garantia da Qualidade dos Cuidados de Saúde/métodos
9.
Plants (Basel) ; 10(8)2021 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-34451762

RESUMO

A detailed chemical composition of Dendrobium essential oil has been only reported for a few main species. This article is the first to evaluate the essential oil composition, obtained by steam distillation, of five Indian Dendrobium species: Dendrobium chrysotoxum Lindl., Dendrobium harveyanum Rchb.f., and Dendrobium wardianum R.Warner (section Dendrobium), Dendrobium amabile (Lour.) O'Brien, and Dendrobium chrysanthum Wall. ex Lindl. (section Densiflora). We investigate fresh flower essential oil obtained by steam distillation, by GC/FID and GC/MS. Several compounds are identified, with a peculiar distribution in the species: Saturated hydrocarbons (range 2.19-80.20%), organic acids (range 0.45-46.80%), esters (range 1.03-49.33%), and alcohols (range 0.12-22.81%). Organic acids are detected in higher concentrations in D. chrysantum, D. wardianum, and D. harveyanum (46.80%, 26.89%, and 7.84%, respectively). This class is represented by palmitic acid (13.52%, 5.76, and 7.52%) linoleic acid (D. wardianum 17.54%), and (Z)-11-hexadecenoic acid (D. chrysantum 29.22%). Esters are detected especially in species from section Dendrobium, with ethyl linolenate, methyl linoleate, ethyl oleate, and ethyl palmitate as the most abundant compounds. Alcohols are present in higher concentrations in D. chrysantum (2.4-di-tert-butylphenol, 22.81%), D. chrysotoxum (1-octanol, and 2-phenylethanol, 2.80% and 2.36%), and D. wardianum (2-phenylethanol, 4.65%). Coumarin (95.59%) is the dominant compound in D. amabile (section Densiflora) and detected in lower concentrations (range 0.19-0.54%) in other samples. These volatile compounds may represent a particular feature of these plant species, playing a critical role in interacting with pollinators.

10.
Front Chem ; 9: 784123, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-35047479

RESUMO

Indocyanine green (ICG) is one of the most commonly used fluorophores in near-infrared fluorescence-guided techniques. However, the molecule is prone to form aggregates in saline solution with a limited photostability and a moderate fluorescence yield. ICG was thus formulated using protein-based nanoparticles of H-ferritin (HFn) in order to generate a new nanostructure, HFn-ICG. In this study, an ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) system was employed to develop and validate the quantitative analysis of ICG in liver tissue samples from HFn-ICG-treated mice. To precipitate HFn, cold acetone in acidic solution at pH 5.0 was used. The processed liver samples were injected into the UHPLC-MS/MS system for analysis using the positive electrospray ionization mode. Chromatographic separation was achieved on a Waters Acquity UPLC® HSS T3 Column (1.8 µm, 2.1 × 100 mm) with 0.1% formic acid and acetonitrile as the mobile phase with gradient elution. The selected reaction monitoring transitions of   m / z 753 → m / z 330 and m / z 827 → m / z 330 were applied for ICG and IR-820 (the internal standard, IS), respectively. The method was selective and linear over a concentration range of 50-1,500 ng/ml. The method was validated for sensitivity, accuracy, precision, extraction recovery, matrix effect, and stability in liver tissue homogenates. ICG extraction recoveries ranged between 85 and 108%. The intra- and inter-day precisions were less than 6.28%. The method was applied to a bio-distribution study to compare the amount of ICG levels from mice treated with HFn-ICG and free ICG. The analyses of the homogenate samples from the two types of treatment showed that the concentration levels of ICG is approximately six-fold higher than those of free ICG (1,411 ± 7.62 ng/ml vs. 235 ± 26.0 ng/ml) at 2 h post injection.

11.
Cells ; 10(2)2021 02 05.
Artigo em Inglês | MEDLINE | ID: mdl-33562504

RESUMO

Cancer-associated fibroblasts (CAFs) are key actors in regulating cancer progression. They promote tumor growth, metastasis formation, and induce drug resistance. For these reasons, they are emerging as potential therapeutic targets. Here, with the aim of developing CAF-targeted drug delivery agents, we functionalized H-ferritin (HFn) nanocages with fibroblast activation protein (FAP) antibody fragments. Functionalized nanocages (HFn-FAP) have significantly higher binding with FAP+ CAFs than with FAP- cancer cells. We loaded HFn-FAP with navitoclax (Nav), an experimental Bcl-2 inhibitor pro-apoptotic drug, whose clinical development is limited by its strong hydrophobicity and toxicity. We showed that Nav is efficiently loaded into HFn (HNav), maintaining its mechanism of action. Incubating Nav-loaded functionalized nanocages (HNav-FAP) with FAP+ cells, we found significantly higher cytotoxicity as compared to non-functionalized HNav. This was correlated with a significantly higher drug release only in FAP+ cells, confirming the specific targeting ability of functionalized HFn. Finally, we showed that HFn-FAP is able to reach the tumor and to target CAFs in a mouse syngeneic model of triple negative breast cancer after intravenous administration. Our data show that HNav-FAP could be a promising tool to enhance specific drug delivery into CAFs, thus opening new therapeutic possibilities focused on tumor microenvironment.


Assuntos
Compostos de Anilina/uso terapêutico , Antineoplásicos/uso terapêutico , Apoferritinas/metabolismo , Fibroblastos Associados a Câncer/metabolismo , Proteínas de Membrana/metabolismo , Microscopia Confocal/métodos , Nanopartículas/metabolismo , Sulfonamidas/uso terapêutico , Engenharia Tecidual/métodos , Compostos de Anilina/farmacologia , Animais , Antineoplásicos/farmacologia , Feminino , Humanos , Camundongos , Sulfonamidas/farmacologia
12.
J Pharm Biomed Anal ; 191: 113644, 2020 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-32987250

RESUMO

Everolimus (Eve) is an immunosuppressive macrolide that is being analyzed in various biological matrices and fluids. Its antitumor activity makes this drug suitable not only for organ transplantation but also for breast cancer treatments. In the attempt to reduce the incidence and severity of its side effects, Eve was loaded in H-ferritin (HFn), a natural biomolecule that is involved in specific cellular uptake pathways. Thus, Eve pre-complexed with Cu(II) and encapsulated in HFn resulted in an Eve nanoformulation, named HEve. The quantification of HEve was performed using a tailored pH-induced procedure to precipitate H-ferritin. This sample preparation was effective enough to reduce the ion suppression effect on the mass spectrometric responses of Eve in electrospray ionization (ESI). The ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-ESI-MS/MS) system operating in positive ionization mode showed to be a versatile technique in achieving more than 77 % recovery of Eve from the cytoplasmic compartment. This simple, selective and sensitive method enabled the quantification of Eve within the linear range of 2.5-100 ng/mL in matrix spiked with the isotope-labeled internal standard, EveD4. This method was validated according to FDA Guidance. The intracellular distribution of HEve and its accumulation at a cytoplasmic level were studied in breast cancer cell lines. As expected, HEve was more effective than free Eve on sensitive (i.e. BT474) and resistant cell lines, as a result of a better penetration into the target subcellular compartment.


Assuntos
Everolimo , Espectrometria de Massas em Tandem , Apoferritinas , Cromatografia Líquida de Alta Pressão , Imunossupressores , Reprodutibilidade dos Testes , Espectrometria de Massas por Ionização por Electrospray
13.
Pharmaceutics ; 11(6)2019 Jun 17.
Artigo em Inglês | MEDLINE | ID: mdl-31213025

RESUMO

The aim of this work was to load an anticancer drug, paclitaxel (PTX), on Silk Fibroin Nanoparticles (SFNs) by using an exogenous approach. SFNs were produced, freeze-dried and then loaded with PTX. An exogenous method allowed us to reduce both drug loss and environmental impact. In order to quantify PTX loaded in SFNs, a simple and reliable method using reversed phase liquid chromatography coupled to tandem mass spectrometry (rp-UHPLC-MS/MS) was developed. This methodology was validated by the determination of spiked QC samples in three consecutive days. Good accuracy and precision of the method were obtained, while the intra-day and inter-day precisions were less than 10.3%. For PTX, the limit of quantitation (LOQ) was 5.0 ng/mL. Recovery from the matrix (SFNs-PTX pellets) was calculated (81.2% at LOQ value) as PTX was entrapped in a new matrix like the polymer silk fibroin-based. This method was successfully applied to determine the encapsulation efficiency (1.00 ± 0.19%) and the nanoparticle loading (0.12 ± 0.02% w/w). The in vitro anticancer activity of SFNs-PTX was tested against CFPAC-1 cancer cells; results demonstrated a very high cytotoxic activity of SFNs-PTX, with a dose dependent inhibition of CFPAC-1 proliferation, confirmed by the IC50 value of 3450 ± 750 ng/mL.

14.
Pharmaceutics ; 11(8)2019 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-31382388

RESUMO

Everolimus (Eve) is an FDA approved drug that inhibits mammalian target of rapamycin (mTOR). It is employed in breast cancer treatment even if its responsiveness is controversial. In an attempt to increase Eve effectiveness, we have developed a novel Eve nanoformulation exploiting H-ferritin nanocages (HEve) to improve its subcellular delivery. We took advantage of the natural tumor targeting of H-Ferritin, which is mediated by the transferrin receptor-1 (TfR1). Breast cancer cells overexpressing TfR-1 were successfully recognized by H-Ferritin, displaying quick nanocage internalization. HEve has been tested and compared to Eve for in vitro efficacy in sensitive and resistant breast cancer cells. Nanoformulated Eve induced remarkable antiproliferative activity in vitro, making even resistant cell lines sensitive to Eve. Moreover, the antiproliferative activity of HEve is fully in accordance with cytotoxicity observed by cell death assay. Furthermore, the significant increase in anticancer efficacy displayed in HEve-treated samples is due to the improved drug accumulation, as demonstrated by UHPLC-MS/MS quantifications. Our findings suggest that optimizing Eve subcellular delivery, thanks to nanoformulation, determines its improved antitumor activity in a panel of Eve-sensitive or resistant breast cancer cell lines.

15.
Toxicol Lett ; 298: 164-170, 2018 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-30315949

RESUMO

A method for the quantitation of α-fluoro-ß-alanine (AFBA), the main metabolite of capecitabine (Cape) and 5-fluoruracil (5-FU), is described. Among antineoplastic drugs (ADs), 5-FU and Cape (the new oral prodrug) are the most commonly applied drugs in cancer therapy. The main objective of this study was to develop a reliable method that would be easy to run on a reversed-phase UHPLC system coupled to tandem mass spectrometry. AFBA was derivatized with Sanger's reagent to ensure complete yield of a stable 2,4 dinitrophenil-α-fluoro-ß-alanine derivative. This method was based on the use of a mixed-mode anion exchange solid phase extraction enabling urinary extracts to be clear of endogenous interferences affecting quantitative results. The assay was validated in human urine according to FDA criteria with the use of a labeled internal standard (ß-alanine-d4) to minimize experimental error. Good accuracy and precision were demonstrated by determining spiked urine QC samples in four consecutive days. The recovery of AFBA was between 70.0 and 82.6%, with a matrix effect that was 12.8%-18.5%. The lower limit of quantitation (LOQ) was 0.5 ng/mL with a coefficient of variation of 5.3%. This assay was successfully applied to determine the levels of this metabolite in a large number of urine samples taken from personnel who were occupationally exposed to ADs.


Assuntos
Cromatografia Líquida de Alta Pressão , Cromatografia de Fase Reversa , Pessoal de Saúde , Espectrometria de Massas em Tandem , beta-Alanina/análogos & derivados , Antineoplásicos/efeitos adversos , Antineoplásicos/metabolismo , Biotransformação , Calibragem , Capecitabina/efeitos adversos , Capecitabina/metabolismo , Cromatografia Líquida de Alta Pressão/normas , Cromatografia de Fase Reversa/normas , Fluoruracila/efeitos adversos , Fluoruracila/metabolismo , Humanos , Exposição Ocupacional/efeitos adversos , Saúde Ocupacional , Padrões de Referência , Reprodutibilidade dos Testes , Medição de Risco , Espectrometria de Massas em Tandem/normas , Urinálise , beta-Alanina/efeitos adversos , beta-Alanina/urina
16.
Ann Work Expo Health ; 61(8): 994-1002, 2017 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-29028251

RESUMO

Antineoplastic drugs (ADs) will continue to represent a potential risk for personnel involved in the handling of these compounds and great concerns have been raised by the presence of ADs in many surveyed workplaces. Eight hospitals were investigated by means of wipe sampling for surface residue determination. Each wipe sample was tested for five ADs considered suitable exposure markers. Cyclophosphamide (CP), gemcitabine (GEM), 5-fluorouracil (5-FU), platinum-containing drugs (Pt), and epi-doxorubicin (EPI) contamination levels were measured in 85 per cent of the studied pharmacies and 93 per cent of outpatient care units (OpCUs). This study showed that 83 out of 349 samples were positive in Pharmacies, this proportion being statistically significant (χ2 = 42.9, p < 0.001). The positive samples provided evidence of at least one substance with levels greater than the limit of detection (LOD). The two most frequently detected substances were Pt (42%) and CP (30%). These accounted for 72 per cent of the whole dataset, followed by 5-FU and GEM. Based on the 90th percentile of wipe sampling data distribution, we suggest hygienic guidance values (HGVs) of 3.6, 1.0, 0.9, and 0.5 ng cm-2 for CP, 5-FU, GEM and Pt, respectively, as the best target levels of the surface contamination load in Italian pharmacies. The approach of proposing guidance values at the 90th percentile of results obtained from workplaces with good hygiene practice was found to be a simple and practical way of controlling occupational exposure. HGVs were challenged in this study as technical threshold limits to benchmark AD residual surface contamination at workplaces.


Assuntos
Antineoplásicos/análise , Monitoramento Ambiental/métodos , Contaminação de Equipamentos/estatística & dados numéricos , Hospitais/estatística & dados numéricos , Exposição Ocupacional/análise , Ciclofosfamida/análise , Desoxicitidina/análogos & derivados , Desoxicitidina/análise , Doxorrubicina/análise , Embalagem de Medicamentos , Fluoruracila/análise , Humanos , Gencitabina
17.
Toxicol Lett ; 162(2-3): 256-62, 2006 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-16246507

RESUMO

Occupational exposure to antineoplastic cytostatic drugs has been recognized as a potential health hazard since the seventies. Safety guidelines and recommendations have been published in several countries in order to improve operating procedures and keep exposure levels as low as possible. Nevertheless, contamination still occurs. With a view to preventing exposure, standardized authorized methods and a mandatory monitoring system appear to be an essential prerequisite. First of all, reliable analytical methods are necessary, and a wide number of drugs should be monitored, on the basis of the continual change in the treatment protocols. In fact, most of the methods available in the literature were not properly validated, and a lack of details concerning quality assurance is clearly observed. When assessing analytical methods applied for routine testing, validation studies are of utmost importance. Not only performance parameters, such as sensitivity, specificity, LOD and LLQ, should therefore be determined, but also the uncertainty of measurement, which gives a measure of the confidence that can be placed on the results.


Assuntos
Antineoplásicos , Monitoramento Ambiental , Exposição Ocupacional , Recursos Humanos em Hospital , Humanos , Exposição por Inalação , Reprodutibilidade dos Testes , Absorção Cutânea , Incerteza
18.
J Biotechnol ; 101(3): 275-87, 2003 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-12615396

RESUMO

The search for novel, cost-effective ways to produce erythropoietin (Epo), the world top-selling biopharmaceutical, is a major challenge for today's biotechnology industry. However, Epo's high glycosylation content (almost 40% of total mass) and the requirement for sialic acid for optimal in vivo activity still make mammalian cells the expression system of choice. In contrast to the abundance of reports on Epo production, robust, cost-effective methods for large-scale Epo purification can hardly be found in literature. To fill this gap, we describe here a process specifically studied for industrial-scale purification of the protein. Our method is based on the ability of phenylboronate agarose (PBA) to form reversible complexes with 1,2-cis-diol-containing molecules, like sugars in glycoproteins. Finding that additional factors (i.e., ionic and hydrophobic interactions) contribute to the Epo-PBA binding reaction, chromatography conditions have been optimized in scale-down experiments to improve selectivity and yield. As a result, the high performance of affinity chromatography has been achieved using a support possessing the robustness, chemical stability and low cost of a small synthetic ligand. By adding an anion exchange chromatography step and gel filtration for polishing, a pure and active product can easily be obtained by an integrated, start-to-end process optimized for industrial-scale operations.


Assuntos
Cromatografia em Agarose/métodos , Eritropoetina/química , Eritropoetina/isolamento & purificação , Sefarose/análogos & derivados , Animais , Células Cultivadas , Eritropoetina/biossíntese , Estudos de Viabilidade , Mamíferos , Projetos Piloto , Controle de Qualidade , Sensibilidade e Especificidade
19.
J Chromatogr B Analyt Technol Biomed Life Sci ; 789(2): 169-209, 2003 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-12742111

RESUMO

In order to assess occupational exposure of hospital personnel involved in the preparation and administration of antineoplastic drugs, biological and environmental monitoring are essential to identify the main exposure routes and to quantify potential health risks. If workplace contamination cannot be completely avoided, it is of utmost importance to reduce exposure to the lowest possible levels. To this aim, not only do education and training of the exposed subjects play an important role, but accurate standardized sampling techniques and analytical methods are also required. A critical overview of the most significant methods available in the literature is presented and their value is discussed, especially with respect to their sensitivity and specificity. In addition, attention is given to validation procedures and, consequently, to their reliability. The results from the most important surveys carried out at hospital departments are also discussed, with a view to improving both monitoring strategies and moreover working conditions.


Assuntos
Antineoplásicos/toxicidade , Monitoramento Ambiental , Exposição Ocupacional , Recursos Humanos em Hospital , Humanos
20.
Toxicol Lett ; 134(1-3): 57-64, 2002 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-12191861

RESUMO

To detect trace amounts of urinary cyclophosphamide (CP), ifosfamide (IF) and methotrexate (MTX), sensitive and specific high-performance liquid chromatography/ tandem mass spectrometry (HPLC-MS/MS) procedures, incorporating either liquid-liquid (for CP and IF), or solid-phase, extraction (for MTX) have been developed. Urinary platinum (Pt) was also detected using inductively coupled plasma-mass spectrometry (ICP-MS). These methods showed acceptable imprecision and inaccuracy. The limit of detection (LOD) was 50 ng/l for CP and IF, 200 ng/l for MTX and 1 ng/l for Pt. Biomonitoring was performed on two consecutive days on nine subjects preparing, and seven administering, antineoplastic drugs. Urine was collected at the beginning, at the end and during the work shift. Eighteen urine samples were positive for CP (range: 50-10031 ng/l), whereas IF was detected in one subject only (153 ng/l). LOD was never exceeded for MTX. In urine samples from nurses and pharmacy technicians, Pt was detected in three subjects (range 920-1300 ng/l). These findings were compared with the results from a previous survey carried out in the same hospital when different work practices were in use. The proposed methods are simple, fast and reliable and can be used to identify exposure of hospital personnel handling antineoplastic drugs.


Assuntos
Antineoplásicos Alquilantes/urina , Monitoramento Ambiental/métodos , Exposição Ocupacional/análise , Recursos Humanos em Hospital , Adulto , Cromatografia Líquida de Alta Pressão , Ciclofosfamida/urina , Feminino , Humanos , Ifosfamida/urina , Masculino , Espectrometria de Massas , Metotrexato/urina , Platina/urina , Sensibilidade e Especificidade
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