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1.
Disabil Rehabil Assist Technol ; : 1-17, 2024 Feb 07.
Artículo en Inglés | MEDLINE | ID: mdl-38323877

RESUMEN

PURPOSE: To present a synthesis of evidence related to the factors influencing communication partners' use of augmentative and alternative communication with persons with severe/profound intellectual disability. MATERIALS AND METHODS: An integrative review guided by five steps; problem identification, literature search, data evaluation, data analysis and presentation was undertaken. In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement, nine databases were searched, 1,342 studies were screened against the eligibility criteria, and 15 studies underwent thematic analysis. RESULTS: Two themes emerged; (1) Achieving Meaningful Communication and (2) Communication Partners' Preparedness to Use Augmentative and Alternative Communication. Achieving meaningful communication was central to communication partners' use of augmentative and alternative communication and was two-fold. It involved identifying the persons' communication methods and encouraging them to communicate. Communication partners' preparedness also influenced their use of augmentative and alternative communication. This preparedness was impacted by communication partners' preconceived thoughts about and knowledge of augmentative and alternative communication, nurturing their belief in augmentative and alternative communication, and the interpersonal dynamic between network members. CONCLUSION: Communication partners' use of augmentative and alternative communication is influenced by multiple and complex factors. The findings contribute to the knowledge of the potential factors to be considered to prepare communication partners to use augmentative and alternative communication.


Multiple, complex factors influence communication partners of persons with severe/profound intellectual disability use of augmentative and alternative communication (AAC), which include communication partners' beliefs, attitudes, expectations, knowledge and resources such as training, support and time.To offer individuals with severe/profound intellectual disability opportunities to communicate, communication partners need to recognise their attempts and thus, their ability. Continuously being sensitive to the individuals' communication methods, whilst being cognisant that these methods can change may enhance communication partners' awareness and understanding of the individuals' communication attempts.Communication partners' need to feel prepared to use AAC. To feel prepared, they need to be aware of the potential benefits that AAC can offer the interaction and the long-term outcomes, develop their knowledge, and be surrounded by a supportive team dynamic.

2.
J Intellect Disabil ; : 17446295231209345, 2023 Oct 21.
Artículo en Inglés | MEDLINE | ID: mdl-37864518

RESUMEN

Persons with intellectual disabilities require frequent access to acute services. Many also access disability services within the community. Reports and enquiries have highlighted the sub-optimal healthcare provided to this group when accessing healthcare in acute services. Joint working between acute and disability services has been identified as a measure to improve healthcare for this group. A mixed method systematic review was undertaken to explore current evidence of joint working between both service providers. Twelve publications were included, and the data were analysed using thematic analysis. Confusion around responsibility and limited training in acute services prevented joint working from occurring. Information-sharing is pivotal in promoting joint-working, but measures which facilitated it were not always used. Albeit acute services demonstrated a strong commitment to deliver quality care to those with intellectual disabilities. Much of the available research captures the experiences of staff in acute services. There is a paucity of research available exploring experiences of disability service providers.

3.
Cancer Immunol Res ; 11(6): 777-791, 2023 06 02.
Artículo en Inglés | MEDLINE | ID: mdl-37040466

RESUMEN

High levels of IL1ß can result in chronic inflammation, which in turn can promote tumor growth and metastasis. Inhibition of IL1ß could therefore be a promising therapeutic option in the treatment of cancer. Here, the effects of IL1ß blockade induced by the mAbs canakinumab and gevokizumab were evaluated alone or in combination with docetaxel, anti-programmed cell death protein 1 (anti-PD-1), anti-VEGFα, and anti-TGFß treatment in syngeneic and humanized mouse models of cancers of different origin. Canakinumab and gevokizumab did not show notable efficacy as single-agent therapies; however, IL1ß blockade enhanced the effectiveness of docetaxel and anti-PD-1. Accompanying these effects, blockade of IL1ß alone or in combination induced significant remodeling of the tumor microenvironment (TME), with decreased numbers of immune suppressive cells and increased tumor infiltration by dendritic cells (DC) and effector T cells. Further investigation revealed that cancer-associated fibroblasts (CAF) were the cell type most affected by treatment with canakinumab or gevokizumab in terms of change in gene expression. IL1ß inhibition drove phenotypic changes in CAF populations, particularly those with the ability to influence immune cell recruitment. These results suggest that the observed remodeling of the TME following IL1ß blockade may stem from changes in CAF populations. Overall, the results presented here support the potential use of IL1ß inhibition in cancer treatment. Further exploration in ongoing clinical studies will help identify the best combination partners for different cancer types, cancer stages, and lines of treatment.


Asunto(s)
Interleucina-1beta , Neoplasias , Microambiente Tumoral , Animales , Ratones , Línea Celular Tumoral , Docetaxel/farmacología , Inmunidad , Inmunoterapia , Neoplasias/tratamiento farmacológico , Interleucina-1beta/antagonistas & inhibidores
4.
J Intellect Disabil ; 27(4): 1107-1134, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-35850628

RESUMEN

People with severe/profound intellectual disability experience challenges in communicating and require their communication partners to adapt to their means of communication. Augmentative and Alternative Communication (AAC) is recognised as a potential means to meet their communication needs. Interventions need to be aimed at both the individual and their communication partners. We conducted a mixed methods systematic review of the literature to synthesise evidence on communication partners experience of communicating with adults with severe/profound intellectual disability through AAC. Eight publications met the inclusion criteria, they underwent thematic synthesis where four themes emerged. A shared commitment to communication partnership is fundamental for the effective and efficient use of AAC. However, there was a disconnect between communication partners perceptions of their roles and responsibilities. This review prompts further research to explore communication partners perceptions of their roles and responsibilities in the use of AAC with people with severe/profound intellectual disabilities.


Asunto(s)
Equipos de Comunicación para Personas con Discapacidad , Trastornos de la Comunicación , Discapacidad Intelectual , Humanos , Adulto , Comunicación
6.
Eur J Cancer Care (Engl) ; 31(4): e13590, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35393746

RESUMEN

OBJECTIVE: Following a review of the existing body of literature, this study aimed to explore the need for a breast cancer awareness intervention specifically targeted at women with mild/moderate levels of intellectual disability (ID) and provide perspectives on the preferred processes and content underpinning an intervention. METHODS: A qualitative, descriptive design using semi-structured, individual (n = 5) and focus group (n = 5) interviews were used to engage with a non-probability, purposive sample of key stakeholders (n = 25) including women with mild/moderate levels of ID, caregivers and healthcare professionals. Data were analysed using qualitative content analysis. RESULTS: Findings highlighted that an educational intervention should focus on breast awareness as opposed to breast cancer awareness. Additionally, findings identified that a combined breast awareness and healthy living intervention could be effective. However, the intervention needs to have a multimodal, hands-on, person-centred approach to learning which is underpinned by theory. Furthermore, integrating the caregivers and healthcare professionals into the intervention is recommended. CONCLUSION: Findings from this study provide a foundation for developing and implementing a theoretically underpinned, multimodal, breast awareness and healthy living educational intervention for women with mild/moderate levels of ID.


Asunto(s)
Neoplasias de la Mama , Discapacidad Intelectual , Cuidadores , Femenino , Educación en Salud , Humanos , Investigación Cualitativa
8.
J Intellect Disabil ; : 1744629521999548, 2021 Mar 26.
Artículo en Inglés | MEDLINE | ID: mdl-33769130

RESUMEN

INTRODUCTION: Incidence rates for developing breast cancer are similar for women regardless of intellectual ability. However, women with an intellectual disability present with advanced breast cancers, which often have a poor prognosis. METHOD: A structured narrative review of the literature was performed to explore the concepts of breast awareness and breast cancer awareness and subsequently, identify barriers to breast cancer awareness encountered by women with an intellectual disability. RESULTS: A total of 22 studies involving people with varying levels of intellectual disability informed this review. The barriers to breast cancer awareness encountered by women with an intellectual disability include: lack of their understanding, the role of the carer and literacy issues. CONCLUSION: Identifying the barriers to breast cancer awareness for women with an intellectual disability will help to facilitate breast cancer awareness which has the potential to result in better long-term outcomes through an early diagnosis of breast cancer.

9.
Cancer Res ; 80(24): 5597-5605, 2020 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-33023946

RESUMEN

In the Canakinumab Anti-inflammatory Thrombosis Outcomes Study (CANTOS), inhibition of the IL1ß inflammatory pathway by canakinumab has been shown to significantly reduce lung cancer incidence and mortality. Here we performed molecular characterization of CANTOS patients who developed lung cancer during the study, including circulating tumor DNA (ctDNA) and soluble inflammatory biomarker analysis. Catalogue of Somatic Mutations in Cancer (COSMIC) database ctDNA mutations were detected in 65% (46/71) of the CANTOS patients with lung cancer, with 51% (36/71) having detectable ctDNA at the time point closest to lung cancer diagnosis and 43% (29/67) having detectable ctDNA at trial randomization. Mutations commonly found in lung cancer were observed with no evidence of enrichment in any mutation following canakinumab treatment. Median time to lung cancer diagnosis in patients with (n = 29) versus without (n = 38) detectable COSMIC ctDNA mutations at baseline was 407 days versus 837 days (P = 0.011). For serum inflammatory biomarker analysis, circulating levels of C-reactive protein (CRP), IL6, IL18, IL1 receptor antagonist, TNFα, leptin, adiponectin, fibrinogen, and plasminogen activator inhibitor-1 were determined. Patients with the highest level of baseline CRP or IL6, both downstream of IL1ß signaling, trended toward a shorter time to lung cancer diagnosis. Other inflammation markers outside of the IL1ß pathway at baseline did not trend with time to lung cancer diagnosis. These results provide further evidence for the importance of IL1ß-mediated protumor inflammation in lung cancer and suggest canakinumab's effect may be mediated in part by delaying disease progression of diverse molecular subtypes of lung cancer. SIGNIFICANCE: These findings suggest that targeting the IL1ß inflammatory pathway might be critical in reducing tumor-promoting inflammation and lung cancer incidence.


Asunto(s)
Antiinflamatorios/administración & dosificación , Anticuerpos Monoclonales Humanizados/administración & dosificación , Inmunoterapia/métodos , Interleucina-1beta/antagonistas & inhibidores , Neoplasias Pulmonares/epidemiología , Neoplasias Pulmonares/prevención & control , Trombosis/terapia , Biomarcadores de Tumor/sangre , Proteína C-Reactiva/análisis , ADN Tumoral Circulante/sangre , ADN Tumoral Circulante/genética , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Incidencia , Interleucina-1beta/sangre , Estudios Longitudinales , Neoplasias Pulmonares/sangre , Neoplasias Pulmonares/mortalidad , Masculino , Mutación , Resultado del Tratamiento
10.
Nutrients ; 12(9)2020 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-32867282

RESUMEN

This study aimed to assess the feasibility of conducting a nutrition trial in adult male prisoners. Adult male prisoners were recruited for a 16-week randomised control trial comparing the effect of ingestion of omega-3 long chain polyunsaturated fatty acids (n-3 LCPUFA) and multivitamin supplements versus placebo on aggressive behaviour. The baseline and post-intervention assessments from the participant blood samples were the erythrocyte n-3 LCPUFA levels as well as measures of aggressive behaviour determined through institutional records of misconduct (IRM), the Inmate Behaviour Observation Scale (IBOS), and questionnaires. A total of 136 adult male prisoners consented to the study with a retention rate of 60%, and 93% of blood samples were successfully collected. The IRM and IBOS scores were collected for 100% of participants, whilst 82-97% of participants completed the questionnaires. From the baseline data, the Odds Ratio shows that prisoners are 4.3 times more likely to have an IBOS >2 if they are below the 6% cut off on the omega-3 index. Both groups improved across all outcome measures and, at the current sample size, no significant differences were seen between them. A power calculation suggests a total sample size of 600 participants is required to detect the effects of this dietary supplementation, and that this supplementation study is feasible in a Correctional Centre. Important criteria for the exclusion and consideration of logistics and compliance are presented.


Asunto(s)
Agresión/efectos de los fármacos , Suplementos Dietéticos , Ácidos Grasos Omega-3/farmacología , Prisioneros/estadística & datos numéricos , Adolescente , Adulto , Anciano , Australia , Método Doble Ciego , Ácidos Grasos Omega-3/administración & dosificación , Ácidos Grasos Omega-3/sangre , Estudios de Factibilidad , Humanos , Masculino , Persona de Mediana Edad , Proyectos Piloto , Encuestas y Cuestionarios , Adulto Joven
13.
Clin Cancer Res ; 22(3): 567-74, 2016 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-26446943

RESUMEN

PURPOSE: Tumor-derived circulating cell-free DNA (cfDNA) is a potential alternative source from which to derive tumor mutation status. cfDNA data from four clinical studies of the BRAF inhibitor (BRAFi) dabrafenib or the MEK inhibitor (MEKi) trametinib were analyzed to determine the association between BRAF mutation status in cfDNA and tumor tissue, and the association of BRAF cfDNA mutation status with baseline factors and clinical outcome. EXPERIMENTAL DESIGN: Patients with BRAF V600 mutation-positive melanoma were enrolled in each study after central confirmation of BRAF status in tumor using a PCR-based assay. BRAF mutation status in cfDNA from patient plasma collected at baseline, 732 of 836 (88%) enrolled patients in total, was determined. RESULTS: BRAF mutations were detectable in cfDNA in 76% and 81% of patients with BRAF V600E/V600K-positive tumors, respectively. Patients negative for BRAF mutations in cfDNA had longer progression-free survival (PFS) and overall survival in each of the four studies, compared with patients with detectable cfDNA BRAF mutations. The presence of BRAF-mutant cfDNA was an independent prognostic factor for PFS after multivariate adjustment for baseline factors in three of four studies. Patients negative for BRAF mutation-positive cfDNA in plasma had higher response rates to dabrafenib and trametinib. CONCLUSIONS: BRAF mutations in cfDNA are detectable in >75% of late-stage melanoma patients with BRAF mutation-positive tumors. The lack of circulating, BRAF mutation-positive cfDNA is clinically significant for metastatic melanoma patients, and may be a prognostic marker for better disease outcome.


Asunto(s)
ADN de Neoplasias , Mutación , Neoplasias/genética , Neoplasias/mortalidad , Proteínas Proto-Oncogénicas B-raf/genética , Sustitución de Aminoácidos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Ensayos Clínicos como Asunto , Codón , ADN de Neoplasias/sangre , Femenino , Humanos , Estimación de Kaplan-Meier , Masculino , Proteínas Quinasas Activadas por Mitógenos/antagonistas & inhibidores , Terapia Molecular Dirigida , Neoplasias/diagnóstico , Neoplasias/tratamiento farmacológico , Pronóstico , Inhibidores de Proteínas Quinasas/administración & dosificación , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Resultado del Tratamiento
15.
PLoS One ; 10(3): e0120220, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25793501

RESUMEN

BACKGROUND: There is emerging evidence that the supplementation of omega-3 contributes to a decrease in aggressive behaviour in prison populations. A challenge of such research is achieving statistical power against effect sizes which may be affected by the baseline omega-3 index. There are no published data on the blood omega-3 index with studies of this kind to assess the variability of the blood omega-3 index in conjunction with aggression and attention deficit assessments. OBJECTIVE: To determine if the variance of the omega-3 index is correlated with aggressive and attention deficit behaviour in a prison population. DESIGN: 136 adult male prisoners were recruited from South Coast Correctional Centre (SCCC), NSW Australia. A 7 point categorisation was used to quantify levels of aggressive behaviour (4 weeks) from individual SCCC case notes, whereby higher scores correspond to increasingly aggressive behaviour. Study participants completed the Aggression Questionnaire (AQ) and the Brown's Attention Deficit Disorder Scales (BADDS), provided a blood sample for erythrocyte fatty acid analysis using gas chromatography and the omega-3 index was calculated. RESULTS: The baseline omega-3 index ranged from 2.3% to 10.3%, indicating that some participants already had substantial omega-3 intake, however a median of 4.7% indicated a lower overall omega-3 intake than the general Australian population. Assessment of aggressive and attention deficit behaviour shows that there were negative correlations between baseline omega-3 index and baseline aggression categorisation scores (r = -0.21, P = 0.016); total AQ score (r = -0.234, P = 0.011); Anger (r = -0.222 p = 0.016); Hostility AQ (r = -0.239, P = 0.009); indirect aggression (r = -0.188 p = 0.042); total BADDS (r = -0.263, p = 0.005); Activation (r = -0.224, p = 0.016); Attention (r = -0.192, p = 0.043); Effort (r = -0.253, p = 0.007); Affect (r = -0.330, p = 0.000) and Memory (r = -0.240, p = 0.010). CONCLUSIONS: There is a high variability in omega-3 status of a NSW prison population, and inmates with lower omega-3 index were more aggressive and had higher ADD scores.


Asunto(s)
Trastorno por Déficit de Atención con Hiperactividad/sangre , Ácidos Grasos Omega-3/sangre , Prisioneros/psicología , Adulto , Anciano , Agresión , Trastorno por Déficit de Atención con Hiperactividad/fisiopatología , Australia , Suplementos Dietéticos , Eritrocitos/química , Ácidos Grasos Omega-3/administración & dosificación , Humanos , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios , Adulto Joven
16.
N Engl J Med ; 372(1): 30-9, 2015 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-25399551

RESUMEN

BACKGROUND: The BRAF inhibitors vemurafenib and dabrafenib have shown efficacy as monotherapies in patients with previously untreated metastatic melanoma with BRAF V600E or V600K mutations. Combining dabrafenib and the MEK inhibitor trametinib, as compared with dabrafenib alone, enhanced antitumor activity in this population of patients. METHODS: In this open-label, phase 3 trial, we randomly assigned 704 patients with metastatic melanoma with a BRAF V600 mutation to receive either a combination of dabrafenib (150 mg twice daily) and trametinib (2 mg once daily) or vemurafenib (960 mg twice daily) orally as first-line therapy. The primary end point was overall survival. RESULTS: At the preplanned interim overall survival analysis, which was performed after 77% of the total number of expected events occurred, the overall survival rate at 12 months was 72% (95% confidence interval [CI], 67 to 77) in the combination-therapy group and 65% (95% CI, 59 to 70) in the vemurafenib group (hazard ratio for death in the combination-therapy group, 0.69; 95% CI, 0.53 to 0.89; P=0.005). The prespecified interim stopping boundary was crossed, and the study was stopped for efficacy in July 2014. Median progression-free survival was 11.4 months in the combination-therapy group and 7.3 months in the vemurafenib group (hazard ratio, 0.56; 95% CI, 0.46 to 0.69; P<0.001). The objective response rate was 64% in the combination-therapy group and 51% in the vemurafenib group (P<0.001). Rates of severe adverse events and study-drug discontinuations were similar in the two groups. Cutaneous squamous-cell carcinoma and keratoacanthoma occurred in 1% of patients in the combination-therapy group and 18% of those in the vemurafenib group. CONCLUSIONS: Dabrafenib plus trametinib, as compared with vemurafenib monotherapy, significantly improved overall survival in previously untreated patients with metastatic melanoma with BRAF V600E or V600K mutations, without increased overall toxicity. (Funded by GlaxoSmithKline; ClinicalTrials.gov number, NCT01597908.).


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Imidazoles/administración & dosificación , Indoles/uso terapéutico , Melanoma/tratamiento farmacológico , Oximas/administración & dosificación , Inhibidores de Proteínas Quinasas/administración & dosificación , Piridonas/administración & dosificación , Pirimidinonas/administración & dosificación , Neoplasias Cutáneas/tratamiento farmacológico , Sulfonamidas/uso terapéutico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Femenino , Humanos , Imidazoles/efectos adversos , Indoles/efectos adversos , Análisis de Intención de Tratar , Estimación de Kaplan-Meier , Masculino , Melanoma/mortalidad , Melanoma/secundario , Persona de Mediana Edad , Quinasas de Proteína Quinasa Activadas por Mitógenos/antagonistas & inhibidores , Mutación , Oximas/efectos adversos , Inhibidores de Proteínas Quinasas/efectos adversos , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Proteínas Proto-Oncogénicas B-raf/genética , Piridonas/efectos adversos , Pirimidinonas/efectos adversos , Neoplasias Cutáneas/patología , Sulfonamidas/efectos adversos , Análisis de Supervivencia , Vemurafenib , Adulto Joven
17.
N Engl J Med ; 371(20): 1877-88, 2014 Nov 13.
Artículo en Inglés | MEDLINE | ID: mdl-25265492

RESUMEN

BACKGROUND: Combined BRAF and MEK inhibition, as compared with BRAF inhibition alone, delays the emergence of resistance and reduces toxic effects in patients who have melanoma with BRAF V600E or V600K mutations. METHODS: In this phase 3 trial, we randomly assigned 423 previously untreated patients who had unresectable stage IIIC or stage IV melanoma with a BRAF V600E or V600K mutation to receive a combination of dabrafenib (150 mg orally twice daily) and trametinib (2 mg orally once daily) or dabrafenib and placebo. The primary end point was progression-free survival. Secondary end points included overall survival, response rate, response duration, and safety. A preplanned interim overall survival analysis was conducted. RESULTS: The median progression-free survival was 9.3 months in the dabrafenib-trametinib group and 8.8 months in the dabrafenib-only group (hazard ratio for progression or death in the dabrafenib-trametinib group, 0.75; 95% confidence interval [CI], 0.57 to 0.99; P=0.03). The overall response rate was 67% in the dabrafenib-trametinib group and 51% in the dabrafenib-only group (P=0.002). At 6 months, the interim overall survival rate was 93% with dabrafenib-trametinib and 85% with dabrafenib alone (hazard ratio for death, 0.63; 95% CI, 0.42 to 0.94; P=0.02). However, a specified efficacy-stopping boundary (two-sided P=0.00028) was not crossed. Rates of adverse events were similar in the two groups, although more dose modifications occurred in the dabrafenib-trametinib group. The rate of cutaneous squamous-cell carcinoma was lower in the dabrafenib-trametinib group than in the dabrafenib-only group (2% vs. 9%), whereas pyrexia occurred in more patients (51% vs. 28%) and was more often severe (grade 3, 6% vs. 2%) in the dabrafenib-trametinib group. CONCLUSIONS: A combination of dabrafenib and trametinib, as compared with dabrafenib alone, improved the rate of progression-free survival in previously untreated patients who had metastatic melanoma with BRAF V600E or V600K mutations. (Funded by GlaxoSmithKline; Clinical Trials.gov number, NCT01584648.).


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Imidazoles/administración & dosificación , Melanoma/tratamiento farmacológico , Quinasas de Proteína Quinasa Activadas por Mitógenos/antagonistas & inhibidores , Oximas/administración & dosificación , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Piridonas/administración & dosificación , Pirimidinonas/administración & dosificación , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Supervivencia sin Enfermedad , Método Doble Ciego , Femenino , Fiebre/inducido químicamente , Humanos , Imidazoles/efectos adversos , Estimación de Kaplan-Meier , Masculino , Melanoma/genética , Melanoma/mortalidad , Persona de Mediana Edad , Mutación , Oximas/efectos adversos , Proteínas Proto-Oncogénicas B-raf/genética , Piridonas/efectos adversos , Pirimidinonas/efectos adversos
18.
Clin Cancer Res ; 20(3): 736-43, 2014 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-24198242

RESUMEN

PURPOSE: Lapatinib, a dual epidermal growth factor receptor (EGFR) and HER2 inhibitor, remains unproven in non-HER2-amplified metastatic breast cancer (MBC). EGF30008, a phase III trial of letrozole and lapatinib versus letrozole and placebo, demonstrated that lapatinib significantly improves outcome for postmenopausal women with HER2-amplified, but not HER2-negative, MBC. The hypothesis that low hormone receptor status is associated with benefit in this HER2-negative cohort was tested. EXPERIMENTAL DESIGN: A blinded retrospective biomarker evaluation used immunohistochemistry (IHC) to semiquantify estrogen receptor (ER) and progesterone receptor (PgR) expression (n = 821/952). HER2 status was determined by IHC and confirmed by FISH (n = 326). Effects of these biomarkers on progression-free survival (PFS) were examined in patients with available tissue. RESULTS: In HER2-negative, ER-positive MBC, median PFS was analyzed by ER and PgR expression (H-score) by quartile (Q). There was significant improvement in patients with low ER expression (Q1, H-score <160) with lapatinib and letrozole (13.6 vs. 6.7 months; P = 0.01). No benefit was associated with stronger ER expression (Q2/3, H-score ≥ 160 and <250; 13.6 vs. 14.2 months; Q4, H-score ≥ 250; 11.2 vs. 14.2 months). There was no association between PgR H-score and benefit from lapatinib. CONCLUSION: In postmenopausal patients with advanced hormone receptor-positive disease, weak ER expression is associated with worse outcome with letrozole treatment compared with the combination. The addition of lapatinib significantly improved PFS for this patient subgroup and augments data supporting interaction between steroid hormone and peptide hormone signaling. A prospective study validating this hypothesis is required.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/metabolismo , Quinazolinas/administración & dosificación , Receptores de Estrógenos/biosíntesis , Receptores de Progesterona/biosíntesis , Adulto , Biomarcadores de Tumor/análisis , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Supervivencia sin Enfermedad , Femenino , Humanos , Inmunohistoquímica , Hibridación Fluorescente in Situ , Estimación de Kaplan-Meier , Lapatinib , Letrozol , Persona de Mediana Edad , Metástasis de la Neoplasia , Nitrilos/administración & dosificación , Posmenopausia , Receptor ErbB-2 , Receptores de Estrógenos/genética , Receptores de Progesterona/genética , Estudios Retrospectivos , Triazoles/administración & dosificación
19.
Cell Rep ; 4(6): 1090-9, 2013 Sep 26.
Artículo en Inglés | MEDLINE | ID: mdl-24055054

RESUMEN

Although BRAF and MEK inhibitors have proven clinical benefits in melanoma, most patients develop resistance. We report a de novo MEK2-Q60P mutation and BRAF gain in a melanoma from a patient who progressed on the MEK inhibitor trametinib and did not respond to the BRAF inhibitor dabrafenib. We also identified the same MEK2-Q60P mutation along with BRAF amplification in a xenograft tumor derived from a second melanoma patient resistant to the combination of dabrafenib and trametinib. Melanoma cells chronically exposed to trametinib acquired concurrent MEK2-Q60P mutation and BRAF-V600E amplification, which conferred resistance to MEK and BRAF inhibitors. The resistant cells had sustained MAPK activation and persistent phosphorylation of S6K. A triple combination of dabrafenib, trametinib, and the PI3K/mTOR inhibitor GSK2126458 led to sustained tumor growth inhibition. Hence, concurrent genetic events that sustain MAPK signaling can underlie resistance to both BRAF and MEK inhibitors, requiring novel therapeutic strategies to overcome it.


Asunto(s)
MAP Quinasa Quinasa 2/genética , Melanoma/tratamiento farmacológico , Melanoma/genética , Mutación , Inhibidores de Proteínas Quinasas/farmacología , Proteínas Proto-Oncogénicas B-raf/genética , Línea Celular Tumoral , Resistencia a Antineoplásicos , Quinasas MAP Reguladas por Señal Extracelular/metabolismo , Amplificación de Genes , Humanos , MAP Quinasa Quinasa 2/antagonistas & inhibidores , MAP Quinasa Quinasa 2/química , Masculino , Melanoma/enzimología , Melanoma/patología , Persona de Mediana Edad , Modelos Moleculares , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Proteínas Quinasas S6 Ribosómicas/metabolismo
20.
J Clin Oncol ; 31(26): 3205-11, 2013 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-23918947

RESUMEN

PURPOSE: Dabrafenib (GSK2118436) is a potent inhibitor of mutated BRAF kinase. Our multicenter, single-arm, phase II study assessed the safety and clinical activity of dabrafenib in BRAF(V600E/K) mutation-positive metastatic melanoma (mut(+) MM). PATIENTS AND METHODS: Histologically confirmed patients with stage IV BRAF(V600E/K) mut(+) MM received oral dabrafenib 150 mg twice daily until disease progression, death, or unacceptable adverse events (AEs). The primary end point was investigator-assessed overall response rate in BRAF(V600E) mut(+) MM patients. Secondary end points included progression-free survival (PFS) and overall survival (OS). Exploratory objectives included the comparison of BRAF mutation status between tumor-specific circulating cell-free DNA (cfDNA) and tumor tissue, and the evaluation of cfDNA as a predictor of clinical outcome. RESULTS: Seventy-six patients with BRAF(V600E) and 16 patients with BRAF(V600K) mut(+) MM were enrolled onto the study. In the BRAF(V600E) group, 45 patients (59%) had a confirmed response (95% CI, 48.2 to 70.3), including five patients (7%) with complete responses. Two patients (13%) with BRAF(V600K) mut(+) MM had a confirmed partial response (95% CI, 0 to 28.7). In the BRAF(V600E) and BRAF(V600K) groups, median PFS was 6.3 months and 4.5 months, and median OS was 13.1 months and 12.9 months, respectively. The most common AEs were arthralgia (33%), hyperkeratosis (27%), and pyrexia (24%). Overall, 25 patients (27%) experienced a serious AE and nine patients (10%) had squamous cell carcinoma. Baseline cfDNA levels predicted response rate and PFS in BRAF(V600E) mut(+) MM patients. CONCLUSION: Dabrafenib was well tolerated and clinically active in patients with BRAF(V600E/K) mut(+) MM. cfDNA may be a useful prognostic and response marker in future studies.


Asunto(s)
Neoplasias Encefálicas/tratamiento farmacológico , Imidazoles/uso terapéutico , Melanoma/tratamiento farmacológico , Oximas/uso terapéutico , Proteínas Proto-Oncogénicas B-raf/antagonistas & inhibidores , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias Encefálicas/mortalidad , Neoplasias Encefálicas/secundario , Femenino , Estudios de Seguimiento , Humanos , Agencias Internacionales , Masculino , Melanoma/mortalidad , Melanoma/patología , Persona de Mediana Edad , Mutación/genética , Pronóstico , Proteínas Proto-Oncogénicas B-raf/genética , Tasa de Supervivencia , Adulto Joven
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