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1.
Sex Health ; 212024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38522475

RESUMO

BACKGROUND: Conversations around disease conducted through social media provide a means for capturing public perspectives that may be useful in considering public health approaches. Syphilis is a sexually transmitted disease that is re-emerging. We sought to characterise online discourse on syphilis using data collected from the social media platform, Twitter. METHODS: We extracted English-language tweets containing the word 'syphilis' posted on Twitter in 2019. Tweet identification number and URL, date and time of posting, number of retweets and likes, and the author's screen name, username and biographical statement were included in the dataset. A systematically sampled 10% subset of the data was subjected to qualitative analysis, involving categorisation on content. All tweets assigned to the category of medical resource were assessed for clinical accuracy. The engagement ratio for each category was calculated as (retweets+likes):tweets. RESULTS: In 2019, 111,388 tweets mentioning syphilis were posted by 69,921 authors. The most frequent content category - totalling 5370 tweets (48%) - was a joke. Of 1762 tweets (16%) categorised as a medical resource, 1484 (84%) were medically correct and 240 (14%) were medically incorrect; for 38 (2%), medical accuracy could not be judged from the information posted. Tweets categorised as personal experiences had the highest engagement ratio at approximately 19:1. Medical resource tweets had an engagement ratio of approximately 7:1. CONCLUSIONS: We found medical information about syphilis was limited on Twitter. As tweets about personal experiences generate high engagement, coupling an experience with information may provide opportunity for public health education.


Assuntos
Infecções Sexualmente Transmissíveis , Mídias Sociais , Sífilis , Humanos , Sífilis/diagnóstico , Comunicação , Saúde Pública
2.
Int J Mol Sci ; 24(4)2023 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-36834715

RESUMO

The interaction between leukocytes and cytokine-activated retinal endothelium is an initiating step in non-infectious uveitis involving the posterior eye, mediated by cell adhesion molecules. However, because cell adhesion molecules are required for immune surveillance, therapeutic interventions would ideally be employed indirectly. Using 28 primary human retinal endothelial cell isolates, this study sought to identify transcription factor targets for reducing levels of the key retinal endothelial cell adhesion molecule, intercellular adhesion molecule (ICAM)-1, and limiting leukocyte binding to the retinal endothelium. Five candidate transcription factors-C2CD4B, EGR3, FOSB, IRF1, and JUNB-were identified by differential expression analysis of a transcriptome generated from IL-1ß- or TNF-α-stimulated human retinal endothelial cells, interpreted in the context of the published literature. Further filtering involved molecular studies: of the five candidates, C2CD4B and IRF1 consistently demonstrated extended induction in IL-1ß- or TNF-α-activated retinal endothelial cells and demonstrated a significant decrease in both ICAM-1 transcript and ICAM-1 membrane-bound protein expression by cytokine-activated retinal endothelial cells following treatment with small interfering RNA. RNA interference of C2CD4B or IRF1 significantly reduced leukocyte binding in a majority of human retinal endothelial cell isolates stimulated by IL-1ß or TNF-α. Our observations suggest that the transcription factors C2CD4B and IRF1 may be potential drug targets for limiting leukocyte-retinal endothelial cell interactions in non-infectious uveitis involving the posterior eye.


Assuntos
Células Endoteliais , Molécula 1 de Adesão Intercelular , Humanos , Adesão Celular , Moléculas de Adesão Celular/metabolismo , Células Cultivadas , Citocinas/metabolismo , Células Endoteliais/metabolismo , Endotélio Vascular/metabolismo , Molécula 1 de Adesão Intercelular/metabolismo , Leucócitos/metabolismo , Fatores de Transcrição/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Molécula 1 de Adesão de Célula Vascular/metabolismo
3.
Br J Ophthalmol ; 107(7): 973-979, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-35197262

RESUMO

BACKGROUND: Ocular toxoplasmosis is common across all regions of the world. Understanding of the epidemiology and approach to diagnosis and treatment have evolved recently. In November 2020, an international group of uveitis-specialised ophthalmologists formed the International Ocular Toxoplasmosis Study Group to define current practice. METHODS: 192 Study Group members from 48 countries completed a 36-item survey on clinical features, use of investigations, indications for treatment, systemic and intravitreal treatment with antiparasitic drugs and corticosteroids, and approach to follow-up and preventive therapy. RESULTS: For 77.1% of members, unilateral retinochoroiditis adjacent to a pigmented scar accounted for over 60% of presentations, but diverse atypical presentations were also reported. Common complications included persistent vitreous opacities, epiretinal membrane, cataract, and ocular hypertension or glaucoma. Most members used clinical examination with (56.8%) or without (35.9%) serology to diagnose typical disease but relied on intraocular fluid testing-usually PCR-in atypical cases (68.8%). 66.1% of members treated all non-pregnant patients, while 33.9% treated selected patients. Oral trimethoprim-sulfamethoxazole was first-line therapy for 66.7% of members, and 60.9% had experience using intravitreal clindamycin. Corticosteroid drugs were administered systemically by 97.4%; 24.7% also injected corticosteroid intravitreally, almost always in combination with an antimicrobial drug (72.3%). The majority of members followed up all (60.4%) or selected (35.9%) patients after resolution of acute disease, and prophylaxis against recurrence with trimethoprim-sulfamethoxazole was prescribed to selected patients by 69.8%. CONCLUSION: Our report presents a current management approach for ocular toxoplasmosis, as practised by a large international group of uveitis-specialised ophthalmologists.


Assuntos
Coriorretinite , Toxoplasmose Ocular , Humanos , Combinação Trimetoprima e Sulfametoxazol/uso terapêutico , Toxoplasmose Ocular/diagnóstico , Toxoplasmose Ocular/tratamento farmacológico , Coriorretinite/diagnóstico , Antibacterianos/uso terapêutico , Inquéritos e Questionários
4.
Ophthalmol Retina ; 6(10): 963-968, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35568370

RESUMO

PURPOSE: Toxoplasmic retinochoroiditis is the most common clinical manifestation of an infection with the protozoan parasite, Toxoplasma gondii. Up to 50% of the human population is estimated to be infected with T. gondii; however, the epidemiology of toxoplasmic retinochoroiditis has not been widely reported. We sought to estimate the prevalence of toxoplasmic retinochoroiditis in Australia using data that were collected as part of the Busselton Healthy Ageing Study. DESIGN: Cross-sectional, community-based, prospective cohort study. PARTICIPANTS: 5020 Australian adults (2264 men and 2756 women; age range, 45-69 years, and median age, 58 years). METHODS: Retinal color photographs, centered on the optic disc and macula, were captured using a digital retinal camera after the dilation of the pupils. Three uveitis-subspecialized ophthalmologists assessed each pigmented retinal lesion, and complete concordance of opinion was required to assign a toxoplasmic etiology. Serum T. gondii immunoglobulin (Ig)G levels were measured for those participants with retinal lesions judged to be toxoplasmic retinochoroiditis. MAIN OUTCOME MEASURES: Prevalence of toxoplasmic retinochoroiditis. RESULTS: Eight participants (0.16%) had retinal lesions that were considered to have the characteristic appearance of toxoplasmic retinochoroiditis, plus detectable serum T. gondii IgG, consistent with the diagnosis of toxoplasmic retinochoroiditis. On the assumption that 23.81% of retinal lesions occur at the posterior pole, as reported in a community-based survey conducted in Brazil (Sci Rep. 2021;11:3420), the prevalence of toxoplasmic retinochoroiditis was estimated to be 0.67% or 1 per 149 persons. CONCLUSIONS: Toxoplasmic retinochoroiditis is common in Australian adults. Efforts to quantify and address risk factors for human infection with T. gondii are justified.


Assuntos
Coriorretinite , Toxoplasma , Toxoplasmose Ocular , Adulto , Idoso , Austrália/epidemiologia , Coriorretinite/diagnóstico , Coriorretinite/epidemiologia , Estudos Transversais , Feminino , Humanos , Imunoglobulina G , Masculino , Pessoa de Meia-Idade , Prevalência , Estudos Prospectivos , Toxoplasmose Ocular/diagnóstico , Toxoplasmose Ocular/epidemiologia
5.
Asia Pac J Ophthalmol (Phila) ; 10(6): 590-594, 2021 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-34789673

RESUMO

PURPOSE: To investigate prevalence and trends in women's authorship of articles in ophthalmic review journals over 2 decades. DESIGN: Literature survey. METHODS: Total number of authors, and number and gender of first and senior (last-named) authors, were identified in all full reviews published in Prog Retin Eye Res, Surv Ophthalmol, and Curr Opin Ophthalmol for the calendar years 1999, 2009, and 2019. The gender of authors was assigned manually by multiple methods. The subspecialty area of each review was captured by keyword and text search. Country of origin was determined from attributions of first and senior authors. RESULTS: The gender of 841 first and senior authors was assigned unequivocally for 471 articles (96%). The frequency of women's authorship rose significantly over time (1999, 2009, 2019) for both first authors (19%, 32%, 44%; P < 0.001) and senior authors (16%, 19%, 29%; P = 0.018). The number of single-author reviews decreased significantly over time (P < 0.001), as did the proportion of reviews with neither a first nor a senior woman author (P < 0.001). Women's first authorship increased over time for reviews on glaucoma (P < 0.001), while women's senior authorship increased for anterior segment/cataract (P = 0.036). The proportion of reviews with a woman first or senior author did not differ by country of origin (P = 0.887 and P = 0.520, respectively). CONCLUSIONS: Women's authorship of articles in ophthalmic review journals increased significantly over the 20-year period, but a gender disparity remained: in 2019, more than 55% of first authors, and more than 70% of senior authors, were men.


Assuntos
Autoria , Publicações Periódicas como Assunto , Bibliometria , Feminino , Humanos , Masculino
6.
Clin Exp Ophthalmol ; 49(1): 38-45, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33426782

RESUMO

IMPORTANCE: Australian- and New Zealand-based, uveitis-specialized ophthalmologists have produced recommendations for the management of juvenile idiopathic arthritis (JIA)-type chronic anterior uveitis. BACKGROUND: Historically, the visual prognosis of JIA-type chronic anterior uveitis has been poor. New medical advances are likely to improve outcomes, but recently published guidelines are tailored for ophthalmic care in Europe and the United States. DESIGN: This work involved a consensus survey and a panel meeting. PARTICIPANTS: The Australian and New Zealand JIA-Uveitis Working Group (29 ophthalmologists) participated in the work. METHODS: The Delphi technique was used to achieve consensus. MAIN OUTCOME MEASURES: This work yielded consensus statements. RESULTS: The Working Group achieved consensus around 18 statements related to clinical evaluation, use of topical and regional corticosteroids, use of systemic corticosteroid and non-corticosteroid immunomodulatory drugs, and management of secondary cataract and glaucoma in childhood JIA-type uveitis. CONCLUSIONS AND RELEVANCE: Recommendations of the Australian and New Zealand JIA-Uveitis Working Group provide current and regionally applicable advice for managing chronic anterior uveitis in children with JIA.


Assuntos
Artrite Juvenil , Catarata , Uveíte Anterior , Uveíte , Artrite Juvenil/complicações , Artrite Juvenil/diagnóstico , Artrite Juvenil/tratamento farmacológico , Austrália/epidemiologia , Criança , Humanos , Uveíte Anterior/diagnóstico , Uveíte Anterior/tratamento farmacológico
7.
J Biol Chem ; 295(16): 5496-5508, 2020 04 17.
Artigo em Inglês | MEDLINE | ID: mdl-32161116

RESUMO

Previous studies have shown that sphingosine kinase interacting protein (SKIP) inhibits sphingosine kinase (SK) function in fibroblasts. SK phosphorylates sphingosine producing the potent signaling molecule sphingosine-1-phosphate (S1P). SKIP gene (SPHKAP) expression is silenced by hypermethylation of its promoter in acute myeloid leukemia (AML). However, why SKIP activity is silenced in primary AML cells is unclear. Here, we investigated the consequences of SKIP down-regulation in AML primary cells and the effects of SKIP re-expression in leukemic cell lines. Using targeted ultra-HPLC-tandem MS (UPLC-MS/MS), we measured sphingolipids (including S1P and ceramides) in AML and control cells. Primary AML cells had significantly lower SK activity and intracellular S1P concentrations than control cells, and SKIP-transfected leukemia cell lines exhibited increased SK activity. These findings show that SKIP re-expression enhances SK activity in leukemia cells. Furthermore, other bioactive sphingolipids such as ceramide were also down-regulated in primary AML cells. Of note, SKIP re-expression in leukemia cells increased ceramide levels 2-fold, inactivated the key signaling protein extracellular signal-regulated kinase, and increased apoptosis following serum deprivation or chemotherapy. These results indicate that SKIP down-regulation in AML reduces SK activity and ceramide levels, an effect that ultimately inhibits apoptosis in leukemia cells. The findings of our study contrast with previous results indicating that SKIP inhibits SK function in fibroblasts and therefore challenge the notion that SKIP always inhibits SK activity.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Leucemia Mieloide Aguda/metabolismo , Fosfotransferases (Aceptor do Grupo Álcool)/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Ceramidas/metabolismo , Humanos , Células K562 , Células Tumorais Cultivadas
8.
Br J Ophthalmol ; 103(11): 1645-1649, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31021330

RESUMO

BACKGROUND: Syphilitic uveitis is re-emerging alongside the systemic infection. In July 2017, an international group of uveitis-specialised ophthalmologists formed the International Ocular Syphilis Study Group to define current practice patterns. METHODS: 103 Study Group members based in 35 countries completed a 25-item questionnaire focused on case load, clinical presentations, use and interpretation of investigations, treatment and clinical indicators of poor prognosis. RESULTS: Members managed a mean of 6.1 patients with syphilitic uveitis in clinics that averaged 707 annual cases of uveitis (0.9%); 53.2% reported increasing numbers over the past decade. Patients presented to more members (40.2%) during secondary syphilis. Uveitis was usually posterior (60.8%) or pan (22.5%); complications included optic neuropathy, macular oedema and posterior synechiae. All members diagnosed syphilitic uveitis using serological tests (simultaneous or sequential testing algorithms), and 97.0% routinely checked for HIV co-infection. Cerebrospinal fluid (CSF) analysis was ordered by 90.2% of members, and 92.7% took uveitis plus Venereal Disease Research Laboratory test (VDRL) or fluorescent treponemal antibody absorption test (FTA-ABS) to indicate neurosyphilis. Patients were commonly co-managed with infectious disease physicians, and treated with penicillin for at least 10-14 days, plus corticosteroid. Features predicting poor outcome included optic neuropathy (86.3%) and initial misdiagnosis (63.7%). Reasons for delayed diagnosis were often practitioner-related. 82.5% of members tested every patient they managed with uveitis for syphilis. CONCLUSION: This comprehensive report by an international group of uveitis-specialised ophthalmologists provides a current approach for the management of syphilitic uveitis.


Assuntos
Infecções Oculares Bacterianas/diagnóstico , Oftalmologia/tendências , Padrões de Prática Médica/estatística & dados numéricos , Sífilis/diagnóstico , Uveíte/diagnóstico , Adulto , Antibacterianos/uso terapêutico , Infecções Oculares Bacterianas/tratamento farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Oftalmologia/organização & administração , Penicilinas/uso terapêutico , Encaminhamento e Consulta , Estudos Retrospectivos , Sociedades Médicas , Inquéritos e Questionários , Sífilis/tratamento farmacológico , Sorodiagnóstico da Sífilis , Uveíte/tratamento farmacológico
10.
Ecol Appl ; 26(1): 233-48, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27039522

RESUMO

Natural populations of plants and animals spatially cluster because (1) suitable habitat is patchy, and (2) within suitable habitat, individuals aggregate further into clusters of higher density. We compare the precision of random and systematic field sampling survey designs under these two processes of species clustering. Second, we evaluate the performance of 13 estimators for the variance of the sample mean from a systematic survey. Replicated simulated surveys, as counts from 100 transects, allocated either randomly or systematically within the study region, were used to estimate population density in six spatial point populations including habitat patches and Matérn circular clustered aggregations of organisms, together and in combination. The standard one-start aligned systematic survey design, a uniform 10 x 10 grid of transects, was much more precise. Variances of the 10 000 replicated systematic survey mean densities were one-third to one-fifth of those from randomly allocated transects, implying transect sample sizes giving equivalent precision by random survey would need to be three to five times larger. Organisms being restricted to patches of habitat was alone sufficient to yield this precision advantage for the systematic design. But this improved precision for systematic sampling in clustered populations is underestimated by standard variance estimators used to compute confidence intervals. True variance for the survey sample mean was computed from the variance of 10 000 simulated survey mean estimates. Testing 10 published and three newly proposed variance estimators, the two variance estimators (v) that corrected for inter-transect correlation (ν8 and ν(W)) were the most accurate and also the most precise in clustered populations. These greatly outperformed the two "post-stratification" variance estimators (ν2 and ν3) that are now more commonly applied in systematic surveys. Similar variance estimator performance rankings were found with a second differently generated set of spatial point populations, ν8 and ν(W) again being the best performers in the longer-range autocorrelated populations. However, no systematic variance estimators tested were free from bias. On balance, systematic designs bring more narrow confidence intervals in clustered populations, while random designs permit unbiased estimates of (often wider) confidence interval. The search continues for better estimators of sampling variance for the systematic survey mean.


Assuntos
Distribuição Animal , Ecossistema , Modelos Biológicos , Animais , Biometria/métodos , Modelos Estatísticos , Projetos de Pesquisa
11.
Blood ; 128(1): 72-81, 2016 07 07.
Artigo em Inglês | MEDLINE | ID: mdl-27103745

RESUMO

Donor T-cell immune responses can eradicate lymphomas after allogeneic hematopoietic stem cell transplantation (AHSCT), but can also damage healthy tissues resulting in harmful graft-versus-host disease (GVHD). Next-generation sequencing has recently identified many new genetic lesions in follicular lymphoma (FL). One such gene, tumor necrosis factor receptor superfamily 14 (TNFRSF14), abnormal in 40% of FL patients, encodes the herpes virus entry mediator (HVEM) which limits T-cell activation via ligation of the B- and T-lymphocyte attenuator. As lymphoma B cells can act as antigen-presenting cells, we hypothesized that TNFRSF14 aberrations that reduce HVEM expression could alter the capacity of FL B cells to stimulate allogeneic T-cell responses and impact the outcome of AHSCT. In an in vitro model of alloreactivity, human lymphoma B cells with TNFRSF14 aberrations had reduced HVEM expression and greater alloantigen-presenting capacity than wild-type lymphoma B cells. The increased immune-stimulatory capacity of lymphoma B cells with TNFRSF14 aberrations had clinical relevance, associating with higher incidence of acute GVHD in patients undergoing AHSCT. FL patients with TNFRSF14 aberrations may benefit from more aggressive immunosuppression to reduce harmful GVHD after transplantation. Importantly, this study is the first to demonstrate the impact of an acquired genetic lesion on the capacity of tumor cells to stimulate allogeneic T-cell immune responses which may have wider consequences for adoptive immunotherapy strategies.


Assuntos
Doença Enxerto-Hospedeiro/genética , Transplante de Células-Tronco Hematopoéticas , Ativação Linfocitária/genética , Linfoma Folicular/genética , Linfoma Folicular/terapia , Membro 14 de Receptores do Fator de Necrose Tumoral/genética , Adulto , Idoso , Aloenxertos , Células Apresentadoras de Antígenos/metabolismo , Células Apresentadoras de Antígenos/patologia , Linfócitos B/metabolismo , Linfócitos B/patologia , Feminino , Doença Enxerto-Hospedeiro/metabolismo , Doença Enxerto-Hospedeiro/patologia , Humanos , Linfoma Folicular/patologia , Masculino , Pessoa de Meia-Idade , Membro 14 de Receptores do Fator de Necrose Tumoral/metabolismo , Linfócitos T/metabolismo , Linfócitos T/patologia
12.
Nat Genet ; 48(2): 183-8, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26691987

RESUMO

Follicular lymphoma is an incurable B cell malignancy characterized by the t(14;18) translocation and mutations affecting the epigenome. Although frequent gene mutations in key signaling pathways, including JAK-STAT, NOTCH and NF-κB, have also been defined, the spectrum of these mutations typically overlaps with that in the closely related diffuse large B cell lymphoma (DLBCL). Using a combination of discovery exome and extended targeted sequencing, we identified recurrent somatic mutations in RRAGC uniquely enriched in patients with follicular lymphoma (17%). More than half of the mutations preferentially co-occurred with mutations in ATP6V1B2 and ATP6AP1, which encode components of the vacuolar H(+)-ATP ATPase (V-ATPase) known to be necessary for amino acid-induced activation of mTORC1. The RagC variants increased raptor binding while rendering mTORC1 signaling resistant to amino acid deprivation. The activating nature of the RRAGC mutations, their existence in the dominant clone and their stability during disease progression support their potential as an excellent candidate for therapeutic targeting.


Assuntos
Linfoma Folicular/genética , Proteínas Monoméricas de Ligação ao GTP/genética , Complexos Multiproteicos/genética , Mutação , Serina-Treonina Quinases TOR/genética , Sequência de Aminoácidos , Animais , Humanos , Alvo Mecanístico do Complexo 1 de Rapamicina , Dados de Sequência Molecular , Proteínas Monoméricas de Ligação ao GTP/química , Complexos Multiproteicos/química , Homologia de Sequência de Aminoácidos , Serina-Treonina Quinases TOR/química
13.
Am Psychol ; 70(6): 566, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26348338

RESUMO

Mathilda (Matty) Bushel Canter, a lifelong contributor to professional psychology, with a remarkable history of service, died in Phoenix, Arizona, on January 30, 2015. Matty was born in Brooklyn, New York, on June 8, 1924, the daughter of Harry and Bertha Bushel. She was preceded in death by her husband and fellow psychologist, Aaron Herman Canter in 1995. She and Aaron had two children, Rachelle (Shelley) and Steven. She is also survived by her brother Arthur Bushel of Baltimore. She made significant contributions to the profession on both a state and national level. Her contributions to the profession led to her being named a fellow of seven divisions of the American Psychological Association (APA; Divisions 12, 29, 31, 35, 42, 44, and 55). In 1984, she became the first female president of the APA Division of Psychotherapy (Division 29). In addition, she produced many articles for the media on the role of psychology in the community. Matty was a strong supporter of the American Psychological Foundation (APF). Matty received numerous awards from APA and its divisions for her contributions. She was a strong supporter of advocacy efforts in psychology and participated in numerous advocacy fundraising events. Her gentle way of handling tough situations earned nothing but respect. Matty mentored so many students and professionals, they are too numerous to note. A true giant of our profession has departed.


Assuntos
Psicologia/história , Arizona , História do Século XX , História do Século XXI , Humanos , Sociedades Científicas
14.
Haematologica ; 100(3): 363-9, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25425693

RESUMO

Gene expression studies have identified the microenvironment as a prognostic player in diffuse large B-cell lymphoma. However, there is a lack of simple immune biomarkers that can be applied in the clinical setting and could be helpful in stratifying patients. Immunohistochemistry has been used for this purpose but the results are inconsistent. We decided to reinvestigate the immune microenvironment and its impact using immunohistochemistry, with two systems of image analysis, in a large set of patients with diffuse large B-cell lymphoma. Diagnostic tissue from 309 patients was arrayed onto tissue microarrays. Results from 161 chemoimmunotherapy-treated patients were used for outcome prediction. Positive cells, percentage stained area and numbers of pixels/area were quantified and results were compared with the purpose of inferring consistency between the two semi-automated systems. Measurement cutpoints were assessed using a recursive partitioning algorithm classifying results according to survival. Kaplan-Meier estimators and Fisher exact tests were evaluated to check for significant differences between measurement classes, and for dependence between pairs of measurements, respectively. Results were validated by multivariate analysis incorporating the International Prognostic Index. The concordance between the two systems of image analysis was surprisingly high, supporting their applicability for immunohistochemistry studies. Patients with a high density of CD3 and FoxP3 by both methods had a better outcome. Automated analysis should be the preferred method for immunohistochemistry studies. Following the use of two methods of semi-automated analysis we suggest that CD3 and FoxP3 play a role in predicting response to chemoimmunotherapy in diffuse large B-cell lymphoma.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Complexo CD3/imunologia , Fatores de Transcrição Forkhead/imunologia , Linfoma Difuso de Grandes Células B/imunologia , Microambiente Tumoral/imunologia , Algoritmos , Anticorpos Monoclonais Murinos/administração & dosagem , Automação Laboratorial , Complexo CD3/genética , Ciclofosfamida/administração & dosagem , Doxorrubicina/administração & dosagem , Fatores de Transcrição Forkhead/genética , Expressão Gênica , Perfilação da Expressão Gênica , Humanos , Imuno-Histoquímica , Linfoma Difuso de Grandes Células B/tratamento farmacológico , Linfoma Difuso de Grandes Células B/genética , Linfoma Difuso de Grandes Células B/mortalidade , Análise Multivariada , Prednisona/administração & dosagem , Prognóstico , Rituximab , Análise de Sobrevida , Análise Serial de Tecidos , Microambiente Tumoral/genética , Vincristina/administração & dosagem
15.
Oncotarget ; 5(22): 11653-68, 2014 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-25362242

RESUMO

Overexpression of the anti-apoptotic protein BCL-2 is characteristic of human follicular lymphoma (FL) and some cases of diffuse large B cell lymphoma (DLBCL). We aimed to determine autophagy status in primary FL and DLBCL samples and the BCL-2+/BCL-2- lymphoma cell lines using both autophagy PCR array and tissue microarray (TMA). A greater number of autophagy machinery genes were up-regulated in the BCL-2+ Su-DHL4 cell line compared with BCL-2- Su-DHL8 cells, at both the basal level and in response to autophagic stress. The autophagy-related gene expression profiles were determined in purified and unpurified malignant human lymph node biopsies. Seven autophagy machinery genes were up-regulated in purified FL B-cells compared with reactive B-cells. Only 2 autophagy machinery genes were up-regulated in DLBCL B-cells. In unpurified tissue biopsies, 20 of 46 genes in FL and 2 of 5 genes in DLBCL with increased expression were autophagy machinery genes. Expression of autophagy substrates p62 and LC3 were determined by TMAs. FL samples showed significantly decreased levels of both p62 and LC3 compared with reactive and DLBCL, indicative of an increased autophagy activity in FL. In summary, these results demonstrate that FL showed increased basal autophagy activity, regardless of overexpression of BCL-2 in this disease.


Assuntos
Autofagia , Regulação Neoplásica da Expressão Gênica , Linfoma Folicular/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Antígenos CD/metabolismo , Antígenos de Diferenciação Mielomonocítica/metabolismo , Proteínas Reguladoras de Apoptose/metabolismo , Linfócitos B/metabolismo , Proteína Beclina-1 , Biópsia , Catepsina D/metabolismo , Linhagem Celular Tumoral , DNA Complementar/metabolismo , Citometria de Fluxo , Proteínas de Ligação ao GTP/metabolismo , Perfilação da Expressão Gênica , Regulação da Expressão Gênica , Humanos , Linfonodos/patologia , Linfoma Folicular/patologia , Macrófagos/metabolismo , Proteínas de Membrana/metabolismo , Proteínas Associadas aos Microtúbulos/metabolismo , Proteína 2 Glutamina gama-Glutamiltransferase , Proteínas de Ligação a RNA/metabolismo , Análise Serial de Tecidos , Transglutaminases/metabolismo
16.
Blood ; 123(11): 1709-19, 2014 Mar 13.
Artigo em Inglês | MEDLINE | ID: mdl-24464016

RESUMO

Chronic lymphocytic leukemia (CLL) is a disease of an accumulation of mature B cells that are highly dependent on the microenvironment for maintenance and expansion. However, little is known regarding the mechanisms whereby CLL cells create their favorable microenvironment for survival. High-mobility group protein B-1 (HMGB1) is a highly conserved nuclear protein that can be actively secreted by innate immune cells and passively released by injured or dying cells. We found significantly increased HMGB1 levels in the plasma of CLL patients compared with healthy controls, and HMGB1 concentration is associated with absolute lymphocyte count. We therefore sought to determine potential roles of HMGB1 in modulating the CLL microenvironment. CLL cells passively released HMGB1, and the timing and concentrations of HMGB1 in the medium were associated with differentiation of nurse-like cells (NLCs). Higher CD68 expression in CLL lymph nodes, one of the markers for NLCs, was associated with shorter overall survival of CLL patients. HMGB1-mediated NLC differentiation involved internalization of both receptor for advanced glycation end products (RAGE) and Toll-like receptor-9 (TLR9). Differentiation of NLCs can be prevented by blocking the HMGB1-RAGE-TLR9 pathway. In conclusion, this study demonstrates for the first time that CLL cells might modulate their microenvironment by releasing HMGB1.


Assuntos
Proteína HMGB1/metabolismo , Leucemia Linfocítica Crônica de Células B/patologia , Linfonodos/patologia , Recidiva Local de Neoplasia/patologia , Receptor para Produtos Finais de Glicação Avançada/metabolismo , Microambiente Tumoral , Western Blotting , Estudos de Casos e Controles , Diferenciação Celular , Proliferação de Células , Técnicas de Cocultura , Meios de Cultivo Condicionados , Ensaio de Imunoadsorção Enzimática , Citometria de Fluxo , Imunofluorescência , Seguimentos , Humanos , Imunoprecipitação , Leucemia Linfocítica Crônica de Células B/metabolismo , Leucemia Linfocítica Crônica de Células B/mortalidade , Linfonodos/metabolismo , Recidiva Local de Neoplasia/metabolismo , Recidiva Local de Neoplasia/mortalidade , Plasmócitos/metabolismo , Plasmócitos/patologia , Prognóstico , Transdução de Sinais , Taxa de Sobrevida , Análise Serial de Tecidos , Receptor Toll-Like 9/metabolismo , Células Tumorais Cultivadas
17.
Nat Genet ; 46(2): 176-181, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24362818

RESUMO

Follicular lymphoma is an incurable malignancy, with transformation to an aggressive subtype representing a critical event during disease progression. Here we performed whole-genome or whole-exome sequencing on 10 follicular lymphoma-transformed follicular lymphoma pairs followed by deep sequencing of 28 genes in an extension cohort, and we report the key events and evolutionary processes governing tumor initiation and transformation. Tumor evolution occurred through either a 'rich' or 'sparse' ancestral common progenitor clone (CPC). We identified recurrent mutations in linker histone, JAK-STAT signaling, NF-κB signaling and B cell developmental genes. Longitudinal analyses identified early driver mutations in chromatin regulator genes (CREBBP, EZH2 and KMT2D (MLL2)), whereas mutations in EBF1 and regulators of NF-κB signaling (MYD88 and TNFAIP3) were gained at transformation. Collectively, this study provides new insights into the genetic basis of follicular lymphoma and the clonal dynamics of transformation and suggests that personalizing therapies to target key genetic alterations in the CPC represents an attractive therapeutic strategy.


Assuntos
Transformação Celular Neoplásica/genética , Progressão da Doença , Genômica/métodos , Linfoma Folicular/genética , Linfoma Folicular/fisiopatologia , Sequência de Bases , Proteína de Ligação a CREB/genética , Análise por Conglomerados , Estudos de Coortes , Proteínas de Ligação a DNA/genética , Proteína Potenciadora do Homólogo 2 de Zeste , Exoma/genética , Sequenciamento de Nucleotídeos em Larga Escala , Histonas/genética , Humanos , Peptídeos e Proteínas de Sinalização Intracelular/genética , Anotação de Sequência Molecular , Dados de Sequência Molecular , Mutagênese , Mutação/genética , Fator 88 de Diferenciação Mieloide/genética , Proteínas de Neoplasias/genética , Proteínas Nucleares/genética , Filogenia , Complexo Repressor Polycomb 2/genética , Polimorfismo de Nucleotídeo Único/genética , Análise de Sequência de DNA , Transativadores/genética , Proteína 3 Induzida por Fator de Necrose Tumoral alfa
18.
Br J Haematol ; 164(6): 790-803, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24372352

RESUMO

To assess the impact of cancer (IOC) on subsequent quality of life (QOL), 718 long-term haematological cancer survivors completed validated psychosocial, functional and QOL scales, including IOC. Fifteen percent reported significant psychological distress, 18% high levels of fatigue and 10% moderate to severe functional impairment. These groups of participants also showed poorer QOL. There were no significant differences in psychological distress (P = 0·76), fatigue (P = 0·23) or functional impairment (P = 0·74) across different cancer subtypes. Two separate hierarchical regression analyses examined the combined association of disease-type, psychosocial and other factors on negative and positive IOC scores respectively. Higher negative IOC scores were significantly associated (P ≤ 0·001) with medical comorbidity, psychological distress, lower social support, high fatigue levels and functional impairment. Paediatric patients (diagnosed at <17 years) had significantly higher negative IOC scores than adult patients (P = 0·001); greater years since diagnosis was significantly (P < 0·001) associated with less negative IOC. Higher positive IOC was associated with acute leukaemia (P = 0·01); lower positive IOC with paediatric patients (P < 0·001), white ethnicity (P < 0·001), higher education (P = 0·003), no partner (P = 0·01) and lower social support (P = 0·01). Screening for medical comorbidity, psychological distress and fatigue identifies those needing most support and should allow earlier interventions to address negative and positive IOC to improve the well-being of cancer survivors.


Assuntos
Depressão/etiologia , Neoplasias Hematológicas/psicologia , Sobreviventes/psicologia , Depressão/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida
19.
Br J Haematol ; 164(4): 526-35, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24236665

RESUMO

Problems of sexual function and fertility in long-term survivors (≥5 years) of haematological malignancy are often neglected in clinic. Our centre carried out a questionnaire study in this population addressing patient-perceived fertility and sexual function. 718 patients responded (56% of those invited; 39% Hodgkin, 45% non-Hodgkin lymphoma, 16% acute leukaemia). Respondent women were more likely to remain childless than a normal control population. Self-reported infertility was more likely in men than women [odds ratio (OR) 1·77, P = 0·001]. Myeloablative therapy increased the likelihood of childlessness (OR 2·48, P = 0·004). Few attended fertility support services (12%). 24% of men banked sperm and 29% of these used the sample, of which 46% resulted in successful pregnancy. Fertility clinic attendance and sperm storage was more likely post-1990 (OR 4·05, P < 0·001; OR 5·05, P < 0·001 respectively). Reporting a negative impact of cancer on sexual function was more common in women than men (OR 2·20, P < 0·001), and increased with current age and age at diagnosis (by 3-4% per year, P ≤ 0·001) but decreased with longer follow-up (by 2%/year, P = 0·005). Patients on anti-depressants and those reporting cancer-related body change/appearance concerns more frequently reported a negative impact (P < 0·04 and P < 0·03 respectively). These self-reported outcomes confirm literature findings, suggest improvement over time, but highlight a need for involvement of support services.


Assuntos
Neoplasias Hematológicas/fisiopatologia , Infertilidade/etiologia , Disfunções Sexuais Fisiológicas/etiologia , Adolescente , Adulto , Feminino , Humanos , Infertilidade/fisiopatologia , Masculino , Gravidez , Qualidade de Vida , Autorrelato , Disfunções Sexuais Fisiológicas/fisiopatologia , Inquéritos e Questionários , Sobreviventes , Resultado do Tratamento , Adulto Jovem
20.
Nucl Med Commun ; 35(3): 311-5, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24323311

RESUMO

AIM: The aim of the study was to investigate the value of fluorine-18-fluorodeoxyglucose ((18)F-FDG)-PET/computed tomography (CT) in identifying diffuse bone marrow (BM) involvement in follicular lymphoma using semiquantitative assessment. METHODS: This is a retrospective analysis of 41 patients with grade 1-3a follicular lymphoma who underwent (18)F-FDG-PET/CT, contrast-enhanced CT and bone marrow trephine biopsy (BMB) as part of staging. BM involvement on PET/CT was assessed by visual and semiquantitative analysis. Standardized uptake values (SUVmax) were measured at the sternum, at both iliac blades and at the T12 vertebra. An average of these four measurements was recorded as SUVav. The single highest overall SUVmax for the four bone sites, the SUVav and the ratios SUVav/mediastinal blood pool (MBP) and SUVav/liver were compared with the BMB result. RESULTS: Focal bone uptake was identified on (18)F-FDG-PET/CT by visual analysis in six patients, including two cases in which the BMB was negative. Assessment of diffuse BM involvement on (18)F-FDG-PET/CT by visual analysis had a sensitivity and specificity of 31 and 92%, respectively. Semiquantitative analysis resulted in an improved sensitivity and specificity of 58 and 96%, respectively, when using SUVav greater than or equal to 2 as the cutoff. Using the ratio SUVav/MBP greater than or equal to 1 the sensitivity of (18)F-FDG-PET/CT to detect BM involvement improved to 83%. CONCLUSION: Visual analysis is useful in determining focal bone involvement, whereas semiquantitative analysis using SUVav/MBP has a high sensitivity and specificity for predicting BM involvement in patients lacking focal bone lesions.


Assuntos
Medula Óssea/diagnóstico por imagem , Linfoma Folicular/diagnóstico , Linfoma Folicular/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Fluordesoxiglucose F18 , Humanos , Linfoma Folicular/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Imagem Multimodal , Tomografia por Emissão de Pósitrons , Estudos Retrospectivos , Tomografia Computadorizada por Raios X
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