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1.
J Drugs Dermatol ; 23(1): 1337-1343, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38206152

RESUMO

BACKGROUND: The objective was to provide international recommendations on anti-aging dermocosmetics for clinical practice starting with essential ingredients for protection and repair before working up to advanced products for specific concerns.  Methods: Seven international experts reviewed 8 hypothetical case scenarios covering different ages, skin issues (eg, sensitivity, acne, melasma), and exposure to exposome factors for both sexes and all Fitzpatrick skin types (FST). The RAND/UCLA appropriateness method was used to obtain consensus. Seventeen key ingredients were rated on a scale from 1 (totally inappropriate) to 9 (totally appropriate). Statistical analysis, 2 meetings, and email discussions refined the recommendations. RESULTS: High-factor broad-spectrum sunscreen (ie, protects against ultraviolet [UV] A and B rays), niacinamide, and other topical antioxidants were recommended for all scenarios. Further discussions were required for other ingredients. Tinted sunscreen/iron oxide were recommended for all FST, although compliance may be sub-optimal for darker skin phototypes (IV-VI), if not cosmetically acceptable. Combining a facial foundation with broad-spectrum sunscreen was recommended for darker phototypes to obtain visible light protection closely matching diverse color tones. Retinols were not recommended as a first-line treatment for sensitive skin, especially FST V and VI, due to the risk of irritation. After ablative laser treatment, alpha hydroxy acids should be avoided or used with caution in FST IV to VI due to the risk of post-inflammatory hyperpigmentation. CONCLUSION: We describe a simple, practical tool for use in daily dermatology consultations for providing recommendations on anti-aging dermocosmetics to cover diverse and inclusive populations of patients, addressing all skin types and international needs.  J Drugs Dermatol. 2024;23(1):1337-1343.     doi:10.36849/JDD.7798.


Assuntos
Higiene da Pele , Protetores Solares , Feminino , Masculino , Humanos , Consenso , Pele , Envelhecimento
2.
J Eur Acad Dermatol Venereol ; 37 Suppl 3: 16-33, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36635618

RESUMO

A thorough knowledge of non-surgical procedures (laser, peelings, injections, threads) and surgical procedures (combined surgeries and skin grafts), including contraindications and potential risks and side effects, (e.g. infection, hypopigmentation, hyperpigmentation, and scarring) is essential to be able to reduce their incidence and ensure the patient receives the most benefit from the procedure. Individuals with darker skin and of high Fitzpatrick phototype are at higher risk of dyschromias, notably melasma and post-inflammatory hyperpigmentation, which may be treated using aesthetic procedures but may also arise as a complication of some procedures. A group of experts in cosmetic surgery and dermatology reviewed the published literature and discussed recommendations for optimizing outcomes with practical advice on supportive skincare before, during and after non-surgical or surgical procedures. A broad-spectrum sunscreen with a high sun protection factor against UVB and high protection against UVA, especially long UVA, is essential for all treatment modalities for the prevention and potential improvement of pigmentation disorders. Supportive skin care management to prepare, cleanse and protect the skin and post-procedure skin care with healing and anti-inflammatory ingredients are recommended to speed up regeneration and wound healing whilst minimizing scarring and downtime. Additionally, adjunctive skin care to procedures with antioxidant, anti-ageing and lightening properties may enhance skin benefits.


Assuntos
Cicatriz , Hiperpigmentação , Humanos , Cicatriz/prevenção & controle , Pele , Hiperpigmentação/tratamento farmacológico , Protetores Solares/uso terapêutico , Higiene da Pele
3.
J Nutr ; 151(5): 1119-1127, 2021 05 11.
Artigo em Inglês | MEDLINE | ID: mdl-33831951

RESUMO

BACKGROUND: Several studies have recently highlighted important roles for adipose tissue in cancer. However, few have examined adipose tissue cholesterol, and no study has been performed in breast adipose tissue associated with breast tumors. OBJECTIVES: The present work was designed to determine if breast adipose tissue cholesterol from the tumor-surrounding area is associated with breast cancer aggressiveness. METHODS: Between 2009 and 2011, 215 breast adipose tissue samples were collected at the Tours University Hospital (France) during surgery of women (aged 28-89 y) with invasive breast cancer. Associations of free cholesterol (FC), esterified cholesterol (EC), and total cholesterol (TC) amounts with clinical variables (age, BMI, and treated or untreated hypercholesterolemia) and tumor aggressiveness parameters [phenotype, grade, presence of inflammatory breast cancer (IBC), and multifocality] were tested using Student's t test and after ANOVA. RESULTS: The predominant form of cholesterol in adipose tissue was FC, and 50% of patients had no detectable EC. The adipose tissue FC content (µg/mg total lipid) was 18% greater in patients >70 y old than in those 40-49 y old (P < 0.05) and the TC content tended to be 12% greater in untreated hypercholesterolemic patients than in normocholesterolemic patients (P = 0.06). Breast adipose cholesterol concentrations were increased in tissues obtained from patients with human-epidermal-growth-factor-receptor-2 (HER2) phenotype (+13% FC; P < 0.05 compared with luminal A), IBC (+15% FC; P = 0.06 compared with noninflammatory tumors), as well as with multifocal triple-negative tumors (+34% FC, P < 0.05; +30% TC, P < 0.05, compared with unifocal triple-negative tumors). Among patients with triple-negative tumors, hypercholesterolemia was significantly more common (P < 0.05) in patients with multifocal tumors (64%) than in patients with unifocal tumors (25%). CONCLUSIONS: This study is the first of this magnitude that analyzes cholesterol concentrations in adipose tissue from female breast cancer patients. An increase in breast adipose tissue cholesterol content may contribute to breast cancer aggressiveness (HER2 phenotype, multifocality of triple-negative tumors, and IBC).


Assuntos
Tecido Adiposo/metabolismo , Neoplasias da Mama/patologia , Colesterol/metabolismo , Glândulas Mamárias Humanas/metabolismo , Glândulas Mamárias Humanas/patologia , Invasividade Neoplásica/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/epidemiologia , Feminino , França/epidemiologia , Humanos , Pessoa de Meia-Idade
4.
Molecules ; 26(17)2021 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-34500781

RESUMO

This work describes the synthesis, enzymatic activities on PI3K and mTOR, in silico docking and cellular activities of various uncommon 2,4,7 trisubstituted pyrido[3,2-d]pyrimidines. The series synthesized offers a chemical diversity in C-7 whereas C-2 (3-hydroxyphenyl) and C-4 groups (morpholine) remain unchanged, in order to provide a better understanding of the molecular determinants of PI3K selectivity or dual activity on PI3K and mTOR. Some C-7 substituents were shown to improve the efficiency on kinases compared to the 2,4-di-substituted pyrimidopyrimidine derivatives used as references. Six novel derivatives possess IC50 values on PI3Kα between 3 and 10 nM. The compounds with the best efficiencies on PI3K and mTOR induced micromolar cytotoxicity on cancer cell lines possessing an overactivated PI3K pathway.


Assuntos
Desenho de Fármacos , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Proteínas Quinases/farmacologia , Piridinas/farmacologia , Pirimidinas/farmacologia , Serina-Treonina Quinases TOR/antagonistas & inibidores , Linhagem Celular Tumoral , Relação Dose-Resposta a Droga , Humanos , Simulação de Acoplamento Molecular , Estrutura Molecular , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/química , Piridinas/síntese química , Piridinas/química , Pirimidinas/síntese química , Pirimidinas/química , Relação Estrutura-Atividade , Serina-Treonina Quinases TOR/metabolismo
5.
Mod Pathol ; 33(8): 1505-1517, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32094425

RESUMO

Diagnosis of osteocartilaginous pathologies depends on morphological examination and immunohistochemical and molecular biology analyses. Decalcification is required before tissue processing, but available protocols often lead to altered proteins and nucleic acids, and thus compromise the diagnosis. The objective of this study was to compare the effect of different methods of decalcification on histomolecular analyses required for diagnosis and to recommend an optimal protocol for processing these samples in routine practice. We prospectively submitted 35 tissue samples to different decalcification procedures with hydrochloric acid, formic acid, and EDTA, in short, overnight and long cycles for 1 to >10 cycles. Preservation of protein integrity was examined by immunohistochemistry, and quality of nucleic acids was estimated after extraction (DNA and RNA concentrations, 260/280 ratios, PCR cycle thresholds), analysis of DNA mutations (high-resolution melting) or amplifications (PCR, in situ hybridization), and detection of fusion transcripts (RT-PCR, in situ hybridization). Hydrochloric acid- and long-term formic acid-based decalcification induced false-negative results on immunohistochemistry and molecular analysis. EDTA and short-term formic acid-based decalcification (<5 cycles of 6 h each) did not alter antigenicity and allowed for detection of gene mutations, amplifications or even fusion transcripts. EDTA showed superiority for in situ hybridization techniques. According to these results and our institutional experience, we propose recommendations for decalcification of bone samples, from biopsies to surgical specimens.


Assuntos
Artefatos , Doenças Ósseas/diagnóstico , Técnica de Descalcificação/métodos , Ácidos Nucleicos/agonistas , Ácido Edético/farmacologia , Formiatos/farmacologia , Humanos , Ácido Clorídrico/farmacologia , Imuno-Histoquímica , Ácidos Nucleicos/análise , Ácidos Nucleicos/efeitos dos fármacos
6.
Mol Cancer ; 13: 264, 2014 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-25496128

RESUMO

BACKGROUND: Na(V)1.5 voltage-gated sodium channels are abnormally expressed in breast tumours and their expression level is associated with metastatic occurrence and patients' death. In breast cancer cells, Na(V)1.5 activity promotes the proteolytic degradation of the extracellular matrix and enhances cell invasiveness. FINDINGS: In this study, we showed that the extinction of Na(V)1.5 expression in human breast cancer cells almost completely abrogated lung colonisation in immunodepressed mice (NMRI nude). Furthermore, we demonstrated that ranolazine (50 µM) inhibited Na(V)1.5 currents in breast cancer cells and reduced Na(V)1.5-related cancer cell invasiveness in vitro. In vivo, the injection of ranolazine (50 mg/kg/day) significantly reduced lung colonisation by Na(V)1.5-expressing human breast cancer cells. CONCLUSIONS: Taken together, our results demonstrate the importance of Na(V)1.5 in the metastatic colonisation of organs by breast cancer cells and indicate that small molecules interfering with Na(V) activity, such as ranolazine, may represent powerful pharmacological tools to inhibit metastatic development and improve cancer treatments.


Assuntos
Acetanilidas/farmacologia , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Pulmão/patologia , Canal de Sódio Disparado por Voltagem NAV1.5/metabolismo , Invasividade Neoplásica/patologia , Piperazinas/farmacologia , Animais , Neoplasias da Mama/metabolismo , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Feminino , Humanos , Camundongos , Camundongos Nus , Metástase Neoplásica/tratamento farmacológico , Metástase Neoplásica/patologia , Ranolazina
7.
Biol Chem ; 395(9): 1015-25, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24643912

RESUMO

The dysregulated expression of kallikrein-related peptidase 6 (KLK6) is involved in non-small cancer (NSCLC) cell growth. However, the mechanism that sustains KLK6 signaling remains unknown. We used an isogenic non-small cell lung cancer (NSCLC) cell model system to demonstrate that KLK6 promotes the proliferation of lung tumoral cells and restrains their apoptosis in vitro via ligand-dependent EGFR transactivation. KLK6 activated the ERK and Akt pathways and triggered the nuclear translocation of ß-catenin. The stimulating effects of KLK6 required its proteolytic activity and were dependent on the protease-activated receptor 2 (PAR2). These observations support the concept of a role for KLK6 in the oncogenesis of NSCLC.


Assuntos
Receptores ErbB/metabolismo , Calicreínas/metabolismo , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patologia , Receptor PAR-2/metabolismo , Caderinas/metabolismo , Linhagem Celular Tumoral , Núcleo Celular/metabolismo , Proliferação de Células , Sobrevivência Celular , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Inativação Gênica , Humanos , Ligantes , Proteínas Mutantes/metabolismo , Fosforilação , Transporte Proteico , Proteínas Proto-Oncogênicas c-akt/metabolismo , beta Catenina/metabolismo
8.
Int J Med Microbiol ; 304(3-4): 327-38, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24360996

RESUMO

Invasive pulmonary aspergillosis remains a matter of great concern in oncology/haematology, intensive care units and organ transplantation departments. Despite the availability of various diagnostic tools with attractive features, new markers of infection are required for better medical care. We therefore looked for potential pulmonary biomarkers of aspergillosis, by carrying out two-dimensional (2D) gel electrophoresis comparing the proteomes of bronchial-alveolar lavage fluids (BALF) from infected rats and from control rats presenting non-specific inflammation, both immunocompromised. A bioinformatic analysis of the 2D-maps revealed significant differences in the abundance of 20 protein spots (ANOVA P-value<0.01; q-value<0.03; power>0.8). One of these proteins, identified by mass spectrometry, was considered of potential interest: inter-alpha-inhibitor H4 heavy-chain (ITIH4), characterised for the first time in this infectious context. Western blotting confirmed its overabundance in all infected BALF, particularly at early stages of murine aspergillosis. Further investigations were carried on rat serum, and confirmed that ITIH4 levels increased during experimental aspergillosis. Preliminary results in human samples strengthened this trend. To our knowledge, this is the first description of the involvement of ITIH4 in aspergillosis.


Assuntos
alfa-Globulinas/análise , Aspergilose/diagnóstico , Biomarcadores/análise , Líquido da Lavagem Broncoalveolar/química , Animais , Biomarcadores/sangue , Western Blotting , Modelos Animais de Doenças , Eletroforese em Gel Bidimensional , Masculino , Ratos Sprague-Dawley , Soro/química
9.
Biochem J ; 447(3): 363-70, 2012 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-22860995

RESUMO

The serine proteases released by activated polymorphonuclear neutrophils [NSPs (neutrophil serine proteases)] contribute to a variety of inflammatory lung diseases, including CF (cystic fibrosis). They are therefore key targets for the development of efficient inhibitors. Although rodent models have contributed to our understanding of several diseases, we have previously shown that they are not appropriate for testing anti-NSP therapeutic strategies [Kalupov, Brillard-Bourdet, Dade, Serrano, Wartelle, Guyot, Juliano, Moreau, Belaaouaj and Gauthier (2009) J. Biol. Chem. 284, 34084-34091). Thus NSPs must be characterized in an animal model that is much more likely to predict how therapies will act in humans in order to develop protease inhibitors as drugs. The recently developed CFTR-/- (CFTR is CF transmembrane conductance regulator) pig model is a promising alternative to the mouse model of CF [Rogers, Stoltz, Meyerholz, Ostedgaard, Rokhlina, Taft, Rogan, Pezzulo, Karp, Itani et al. (2008) Science 321, 1837-1841]. We have isolated blood neutrophils from healthy pigs and determined their responses to the bacterial pathogens Pseudomonas aeruginosa and Staphylococcus aureus, and the biochemical properties of their NSPs. We used confocal microscopy and antibodies directed against their human homologues to show that the three NSPs (elastase, protease 3 and cathepsin G) are enzymatically active and present on the surface of triggered neutrophils and NETs (neutrophil extracellular traps). All of the porcine NSPs are effectively inhibited by human NSP inhibitors. We conclude that there is a close functional resemblance between porcine and human NSPs. The pig is therefore a suitable animal model for testing new NSP inhibitors as anti-inflammatory agents in neutrophil-associated diseases such as CF.


Assuntos
Modelos Animais de Doenças , Neutrófilos/enzimologia , Pneumonia/enzimologia , Serina Proteases/metabolismo , Animais , Calcimicina/farmacologia , Ionóforos de Cálcio/farmacologia , Degranulação Celular , Humanos , Técnicas In Vitro , Ativação de Neutrófilo , Neutrófilos/efeitos dos fármacos , Neutrófilos/microbiologia , Pneumonia/sangue , Pseudomonas aeruginosa/fisiologia , Inibidores de Serina Proteinase/farmacologia , Especificidade da Espécie , Staphylococcus aureus/fisiologia , Suínos
10.
Histol Histopathol ; 38(3): 247-260, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36205240

RESUMO

Primary aneurysmal bone cyst, nodular fasciitis, myositis ossificans and related lesions as well as fibroma of tendon sheath are benign tumors that share common histological features and a chromosomal rearrangement involving the ubiquitin-specific peptidase 6 (USP6) gene. The tumorigenesis of this tumor spectrum has become complex with the identification of an increasing number of new partners involved in USP6 rearrangements. Because traumatic involvement has long been mentioned in the histogenesis of most lesions in the USP6 spectrum and they morphologically resemble granulation tissue or callus, we attempted to shed light on the function and role USP6 partners play in tissue remodelling and the repair process and, to a lesser extent, bone metabolism.


Assuntos
Cistos Ósseos Aneurismáticos , Fasciite , Neoplasias de Tecidos Moles , Humanos , Proteínas Proto-Oncogênicas/genética , Ubiquitina Tiolesterase/genética , Fasciite/genética , Fasciite/patologia , Cistos Ósseos Aneurismáticos/genética , Cistos Ósseos Aneurismáticos/patologia , Rearranjo Gênico , Neoplasias de Tecidos Moles/genética , Neoplasias de Tecidos Moles/patologia
11.
Int J Cancer ; 131(2): 426-37, 2012 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-21898387

RESUMO

Novel prognostic biomarkers are imperatively needed to help direct treatment decisions by typing subgroups of node-negative breast cancer patients. Large screening of different biological compartments, such as the proteome, by means of high throughput techniques may greatly help scientists to find such markers. The present retrospective multicentric study included 268 node-negative breast cancer patients. We used a proteomic approach of SELDI-TOF-MS screening to identify differentially expressed cytosolic proteins with prognostic impact. The screening cohort was composed of 198 patients. Seventy supplementary patients were included for validation. Immunohistochemistry (IHC) and immunoassay (IA) were run to confirm the prognostic role of the marker identified by SELDI-TOF-MS screening. IHC was also used to explore links between selected marker and epithelial-mesenchymal transition (EMT)-like, proliferation and macrophage markers. Ferritin light chain (FTL) was identified as an independent prognostic marker (HR = 1.30-95% CI: 1.10-1.50, p = 0.001). Validation step by means of IHC and IA confirmed the prognostic value of FTL level. CD68 IHC showed that FTL was stored in tumor-associated macrophages (TAM), which exhibit an M2-like phenotype. We report here, first, the validation of FTL as a breast tumor prognostic biomarker in node-negative patients, and second, the fact that FTL is stored in TAM.


Assuntos
Apoferritinas/análise , Biomarcadores Tumorais/análise , Neoplasias da Mama/química , Neoplasias da Mama/diagnóstico , Macrófagos/química , Adulto , Idoso , Antígenos CD/análise , Antígenos de Diferenciação Mielomonocítica/análise , Neoplasias da Mama/patologia , Proliferação de Células , Estudos de Coortes , Citosol , Transição Epitelial-Mesenquimal/fisiologia , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Proteômica , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz/métodos
12.
FASEB J ; 25(9): 3019-31, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21670065

RESUMO

The physiological and pathological functions of proteinase 3 (PR3) are not well understood due to its close similarity to human neutrophil elastase (HNE) and the lack of a specific inhibitor. Based on structural analysis of the active sites of PR3 and HNE, we generated mutants derived from the polyvalent inhibitor SerpinB1 (monocyte/neutrophil elastase inhibitor) that specifically inhibit PR3 and that differ from wt-SerpinB1 by only 3 or 4 residues in the reactive center loop. The rate constant of association between the best SerpinB1 mutant and PR3 is 1.4 × 107 M⁻¹ · s⁻¹, which is ∼100-fold higher than that observed with wt-SerpinB1 and compares with that of α1-protease inhibitor (α1-PI) toward HNE. SerpinB1(S/DAR) is cleaved by HNE, but due to differences in rate, inhibition of PR3 by SerpinB1(S/DAR) is only minimally affected by the presence of HNE even when the latter is in excess. SerpinB1(S/DAR) inhibits soluble PR3 and also membrane-bound PR3 at the surface of activated neutrophils. Moreover, SerpinB1(S/DAR) clears induced PR3 from the surface of activated neutrophils. Overall, these specific inhibitors of PR3 will be valuable for defining biological functions of the protease and may prove useful as therapeutics for PR3-related inflammatory diseases, such as Wegener's granulomatosis.


Assuntos
Autoantígenos/metabolismo , Granulomatose com Poliangiite/imunologia , Mieloblastina/antagonistas & inibidores , Neutrófilos/efeitos dos fármacos , Serpinas/farmacologia , Autoanticorpos/química , Autoanticorpos/metabolismo , Clonagem Molecular , Humanos , Modelos Moleculares , Mutação , Mieloblastina/metabolismo , Neutrófilos/metabolismo , Conformação Proteica , Proteínas Recombinantes , Serpinas/química
13.
J Neurooncol ; 106(3): 493-504, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21928115

RESUMO

Glioblastoma (GB) is a highly infiltrative tumor recurring in 90% of cases within a few centimeters of the resection cavity, even in cases of complete tumor resection and adjuvant chemo/radiotherapy. This observation highlights the importance of understanding this special zone of brain tissue surrounding the tumor. It is becoming clear that the nonneoplastic stromal compartment of most solid cancers plays an active role in tumor proliferation, invasion, and metastasis. Very little information, other than that concerning angiogenesis and immune cells, has been collected for stromal cells from GB. As part of a translational research program, we have isolated a new stromal cell population surrounding GB by computer-guided stereotaxic biopsies and primary culture. We named these cells GB-associated stromal cells (GASCs). GASCs are diploid, do not display the genomic alterations typical of GB cells, and have phenotypic and functional properties in common with the cancer-associated fibroblasts (CAFs) described in the stroma of carcinomas. In particular, GASCs express markers associated with CAFs such as fibroblast surface protein, alpha-smooth muscle actin (α-SMA), and platelet-derived growth factor receptor-beta (PDGFRß). Furthermore, GASCs have a molecular expression profile different from that of control stromal cells derived from non-GB peripheral brain tissues. GASCs were also found to have tumor-promoting effects on glioma cells in vitro and in vivo. The isolation of GASCs in a tumor of neuroepithelial origin was unexpected, and further studies are required to determine their potential as a target for antiglioma treatment.


Assuntos
Neoplasias Encefálicas/patologia , Separação Celular , Transformação Celular Neoplásica/patologia , Regulação Neoplásica da Expressão Gênica/fisiologia , Glioblastoma/patologia , Biópsia/métodos , Diferenciação Celular , Separação Celular/métodos , Citometria de Fluxo , Perfilação da Expressão Gênica , Humanos , Imageamento Tridimensional , Imageamento por Ressonância Magnética , Análise de Sequência com Séries de Oligonucleotídeos , Fenótipo , RNA Mensageiro/metabolismo
14.
Biomedicines ; 10(5)2022 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-35625732

RESUMO

While obesity is linked to cancer risk, no studies have explored the consequences of body mass index (BMI) on fatty acid profiles in breast adipose tissue and on breast tumor aggressiveness indicators. Because of this, 261 breast adipose tissue samples of women with invasive breast carcinoma were analyzed. Fatty acid profile was established by gas chromatography. For normal-weight women, major changes in fatty acid profile occurs after menopause, with the enrichment of long-chain polyunsaturated fatty acids (LC-PUFAs) of both n-6 and n-3 series enrichment, but a stable LC-PUFAs n-6/n-3 ratio across age. BMI impact was analyzed by age subgroups to overcome the age effect. BMI increase is associated with LC-PUFAs n-6 accumulation, including arachidonic acid. Positive correlations between BMI and several LC-PUFAs n-6 were observed, as well as a strong imbalance in the LC-PUFAs n-6/n-3 ratio. Regarding cancer, axillary lymph nodes (p = 0.02) and inflammatory breast cancer (p = 0.08) are more frequently involved in obese women. Increased BMI induces an LC-PUFAs n-6 accumulation, including arachidonic acid, in adipose tissue. This may participate in the development of low-grade inflammation in obese women and breast tumor progression. These results suggest the value of lifestyle and LC-PUFAs n-3 potential, in the context of obesity and breast cancer secondary/tertiary prevention.

15.
Ann Pathol ; 31(6): 427-32, 2011 Dec.
Artigo em Francês | MEDLINE | ID: mdl-22172115

RESUMO

The management of colorectal liver metastases has been improved these last years. The efficacy of chemotherapy regimens and targeted therapies has led to a better prognosis. It has also allowed the resection of metastases initially unresectable. In this setting, the pathologist plays a major role. He is involved in the gross examination, in order to perform an adequate sampling of the lesions. He is also involved at the morphological level, for the assessment of the pathological response, which is now recognized as a prognostic factor and a marker of sensitivity or resistance to a given treatment. Moreover, the determination of predictive markers of response or resistance to induction treatments will constitute a supplementary and major challenge for the pathologist.


Assuntos
Adenocarcinoma/secundário , Antineoplásicos/uso terapêutico , Neoplasias Colorretais/patologia , Quimioterapia de Indução , Neoplasias Hepáticas/secundário , Patologia Clínica , Papel do Médico , Adenocarcinoma/química , Adenocarcinoma/tratamento farmacológico , Adenocarcinoma/cirurgia , Antineoplásicos/efeitos adversos , Biomarcadores Tumorais/análise , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Terapia Combinada , Gerenciamento Clínico , Humanos , Comunicação Interdisciplinar , Neoplasias Hepáticas/química , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/cirurgia , Terapia de Alvo Molecular , Gradação de Tumores , Prognóstico , Resultado do Tratamento
16.
Ann Pathol ; 31(6): 433-41, 2011 Dec.
Artigo em Francês | MEDLINE | ID: mdl-22172116

RESUMO

Locally advanced rectal cancers mainly correspond to lieberkünhien adenocarcinomas and are defined by T3-T4 lesions with or without regional metastatic lymph nodes. Such tumors benefit from neoadjuvant treatment combining chemotherapy and radiotherapy, followed by surgery with total mesorectum excision. Such a strategy can decrease the rate of local relapse and lead to an easier complementary surgery. The pathologist plays an important role in the management of locally advanced rectal cancer. Indeed, he is involved in the gross examination of the mesorectum excision quality and in the exhaustive sampling of the most informative areas. He also has to perform a precise histopathological analysis, including the determination of the circumferential margin or clearance and the evaluation of tumor regression. All these parameters are major prognostic factors which have to be clearly included in the pathology report. Moreover, the next challenge for the pathologist will be to determine and validate new prognostic and predictive markers, notably by using pre-therapeutic biopsies. The goal of this mini-review is to emphasize the pathologist's role in the different steps of the management of locally advanced rectal cancers and to underline its implication in the determination of potential biomarkers of aggressiveness and response.


Assuntos
Adenocarcinoma/terapia , Quimiorradioterapia Adjuvante , Terapia Neoadjuvante , Invasividade Neoplásica/patologia , Patologia Clínica , Papel do Médico , Neoplasias Retais/terapia , Adenocarcinoma/química , Adenocarcinoma/patologia , Adenocarcinoma/cirurgia , Antineoplásicos/uso terapêutico , Biomarcadores Tumorais/análise , Biópsia , Cromograninas/análise , Coloides/análise , Terapia Combinada , Gerenciamento Clínico , Humanos , Comunicação Interdisciplinar , Terapia de Alvo Molecular , Gradação de Tumores , Estadiamento de Neoplasias , Prognóstico , Neoplasias Retais/química , Neoplasias Retais/patologia , Neoplasias Retais/cirurgia , Resultado do Tratamento
17.
Surg Oncol ; 38: 101597, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34051659

RESUMO

In a previous pilot study, we showed that polyunsaturated n-3 fatty acids of breast adipose tissues were associated with breast cancer multifocality. In the present study, we investigated biochemical, clinical and histological factors associated with breast cancer focality in a large cohort of women with positive hormone-receptors tumors. One hundred sixty-one consecutive women presenting with positive hormone-receptors breast cancer underwent breast-imaging procedures including a Magnetic Resonance Imaging prior to treatment. Breast adipose tissue specimens were collected during surgery of tumors. A biochemical profile of breast adipose tissue fatty acids was established by gas chromatography. Clinicopathologic characteristics were correlated with multifocality. We assessed whether these factors were predictive of breast cancer focality. We found that tumor size (OR = 1.06 95%CI [1.02-1.09], p < 0.001) and decreased levels in breast adipose tissue of long-chain polyunsaturated n-3 fatty acids (OR = 0.11 95%CI [0.01-0.98], p = 0.03), were independent predictive factors of multifocality. Low levels of long chain polyunsaturated n-3 fatty acids in breast adipose tissue appear to contribute to breast cancer multifocality. The present results reinforce the link between dietary habits and breast cancer clinical presentation.


Assuntos
Tecido Adiposo/patologia , Neoplasias da Mama/patologia , Ácidos Graxos Ômega-3/metabolismo , Receptor ErbB-2/metabolismo , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo , Tecido Adiposo/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/metabolismo , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Invasividade Neoplásica , Prognóstico
18.
Virchows Arch ; 479(1): 147-156, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33558945

RESUMO

Nodular fasciitis, primary aneurysmal bone cyst, myositis ossificans, and their related lesions are benign tumors that share common histological features and a chromosomal rearrangement involving the ubiquitin-specific peptidase 6 (USP6) gene. The identification of an increasing number of new partners implicated in USP6 rearrangements demonstrates a complex tumorogenesis of this tumor spectrum. In this study on a series of 77 tumors (28 nodular fasciitis, 42 aneurysmal bone cysts, and 7 myositis ossificans) from the database of the French Sarcoma Group, we describe 7 new partners of the USP6 gene. For this purpose, rearrangements were first researched by multiplexed RT-qPCRs in the entire population. A targeted RNA sequencing was then used on samples selected according to a high USP6-transcription level expression estimated by RT-qPCR. Thanks to this multistep approach, besides the common USP6 fusions observed, we detected novel USP6 partners: PDLIM7 and MYL12A in nodular fasciitis and TPM4, DDX17, GTF2I, KLF3, and MEF2A in aneurysmal bone cysts. In order to try to bring to light the role played by the recently identified USP6 partners in this lesional spectrum, their functions are discussed. Taking into account that a traumatic participation has long been mentioned in the histogenesis of most of these lesions and because of their morphological resemblance to organizing granulation reparative tissue or callus, a focus is placed on their relationship with tissue remodeling and, to a lesser extent, with bone metabolism.


Assuntos
Cistos Ósseos Aneurismáticos/genética , Fasciite/genética , Fusão Gênica , Rearranjo Gênico , Miosite Ossificante/genética , Ubiquitina Tiolesterase/genética , Adolescente , Adulto , Cistos Ósseos Aneurismáticos/patologia , Criança , Bases de Dados Factuais , Fasciite/patologia , Feminino , França , Predisposição Genética para Doença , Humanos , Masculino , Pessoa de Meia-Idade , Miosite Ossificante/patologia , Fenótipo , Estudos Retrospectivos , Adulto Jovem
19.
Mol Cancer Ther ; 8(2): 357-65, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19174559

RESUMO

Overexpression of human papillomavirus (HPV E6 and HPV E7) oncogenes in human cervical cells results in the development of cancer, and E6 and E7 proteins are therefore targets for preventing cervical cancer progression. Here, we describe the silencing of E6 and E7 expression in cervical carcinoma cells by RNA interference. In order to increase the efficacy of the RNA interference, HPV pseudovirions coding for a short hairpin RNA (shRNA) sequence were produced. The results indicated the degradation of E6 and E7 mRNAs when shRNA against E6 or E7 were delivered by pseudovirions in HPV-positive cells (CaSki and TC1 cells). E6 silencing resulted in the accumulation of cellular p53 and reduced cell viability. More significant cell death was observed when E7 expression was suppressed. Silencing E6 and E7 and the consequences for cancer cell growth were also investigated in vivo in mice using the capacity of murine TC1 cells expressing HPV-16 E6 and E7 oncogenes to induce fast-growing tumors. Treatment with lentiviruses and HPV virus-like particle vectors coding for an E7 shRNA sequence both resulted in dramatic inhibition of tumor growth. These results show the ability of pseudovirion-delivered shRNA to produce specific gene suppression and provide an effective means of reducing HPV-positive tumor growth.


Assuntos
Proteínas Oncogênicas Virais/metabolismo , Papillomaviridae/fisiologia , RNA Interferente Pequeno/metabolismo , Proteínas Repressoras/metabolismo , Neoplasias do Colo do Útero/patologia , Vírion/fisiologia , Montagem de Vírus/fisiologia , Animais , Apoptose , Linhagem Celular Tumoral , Proliferação de Células , Cloretos , Feminino , Regulação Neoplásica da Expressão Gênica , Inativação Gênica , Humanos , Camundongos , Proteínas Oncogênicas Virais/genética , Proteínas E7 de Papillomavirus , Proteínas Repressoras/genética , Transdução Genética , Transfecção , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/virologia , Compostos de Zinco
20.
Eur J Obstet Gynecol Reprod Biol ; 244: 66-70, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31760264

RESUMO

PURPOSE: In the present study, we present a large institutional study to determine the influence of age≥ 80 years on breast cancer presentation and prognosis. METHODS: The study is a retrospective analysis of our prospectively maintained breast cancer database study using data from of women managed from January 2007 through December 2013. Clinicopathologic characteristics were correlated with outcomes according to age (<80 years and ≥ 80 years). RESULTS: During the study period, 2083 women with invasive breast cancer were included of which 160 women aged ≥ 80 years (7.7 %). Overall survival was lower in the oldest old than in younger counterparts (p < 0.0001) as was distant metastasis free survival (p = 0.004). Differences in management included more radical surgeries and less chemotherapy and radiotherapy in case of age≥ 80 years. By multivariate analysis, age ≥ 80 years was an independent predictive factor of poor overall survival. CONCLUSION: In the present study, age ≥ 80 years was an independent predictive factor of poor overall survival.


Assuntos
Neoplasias da Mama/mortalidade , Carcinoma Ductal de Mama/mortalidade , Carcinoma Lobular/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/terapia , Carcinoma Ductal de Mama/terapia , Carcinoma Lobular/terapia , França/epidemiologia , Humanos , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem
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