52 research outputs found
INTELLANCE 2/EORTC 1410 randomized phase II study of Depatux-M alone and with temozolomide vs temozolomide or lomustine in recurrent EGFR amplified glioblastoma
BACKGROUND: Depatuxizumab mafodotin (Depatux-M) is a tumor-specific antibody-drug conjugate consisting of an antibody (ABT-806) directed against activated epidermal growth factor receptor (EGFR) and the toxin monomethylauristatin-F. We investigated Depatux-M in combination with temozolomide or as a single agent in a randomized controlled phase II trial in recurrent EGFR amplified glioblastoma. METHODS: Eligible were patients with centrally confirmed EGFR amplified glioblastoma at first recurrence after chemo-irradiation with temozolomide. Patients were randomized to either Depatux-M 1.25 mg/kg every 2 weeks intravenously, or this treatment combined with temozolomide 150-200 mg/m2 day 1-5 every 4 weeks, or either lomustine or temozolomide. The primary endpoint of the study was overall survival. RESULTS: Two hundred sixty patients were randomized. In the primary efficacy analysis with 199 events (median follow-up 15.0 mo), the hazard ratio (HR) for the combination arm compared with the control arm was 0.71 (95% CI = 0.50, 1.02; P = 0.062). The efficacy of Depatux-M monotherapy was comparable to that of the control arm (HR = 1.04, 95% CI = 0.73, 1.48; P = 0.83). The most frequent toxicity in Depatux-M treated patients was a reversible corneal epitheliopathy, occurring as grades 3-4 adverse events in 25-30% of patients. In the long-term follow-up analysis with median follow-up of 28.7 months, the HR for the comparison of the combination arm versus the control arm was 0.66 (95% CI = 0.48, 0.93). CONCLUSION: This trial suggests a possible role for the use of Depatux-M in combination with temozolomide in EGFR amplified recurrent glioblastoma, especially in patients relapsing well after the end of first-line adjuvant temozolomide treatment. (NCT02343406)
Targeted Destruction of Photosensitive Retinal Ganglion Cells with a Saporin Conjugate Alters the Effects of Light on Mouse Circadian Rhythms
Non-image related responses to light, such as the synchronization of circadian rhythms to the day/night cycle, are mediated by classical rod/cone photoreceptors and by a small subset of retinal ganglion cells that are intrinsically photosensitive, expressing the photopigment, melanopsin. This raises the possibility that the melanopsin cells may be serving as a conduit for photic information detected by the rods and/or cones. To test this idea, we developed a specific immunotoxin consisting of an anti-melanopsin antibody conjugated to the ribosome-inactivating protein, saporin. Intravitreal injection of this immunotoxin results in targeted destruction of melanopsin cells. We find that the specific loss of these cells in the adult mouse retina alters the effects of light on circadian rhythms. In particular, the photosensitivity of the circadian system is significantly attenuated. A subset of animals becomes non-responsive to the light/dark cycle, a characteristic previously observed in mice lacking rods, cones, and functional melanopsin cells. Mice lacking melanopsin cells are also unable to show light induced negative masking, a phenomenon known to be mediated by such cells, but both visual cliff and light/dark preference responses are normal. These data suggest that cells containing melanopsin do indeed function as a conduit for rod and/or cone information for certain non-image forming visual responses. Furthermore, we have developed a technique to specifically ablate melanopsin cells in the fully developed adult retina. This approach can be applied to any species subject to the existence of appropriate anti-melanopsin antibodies
Prospective Observational Study of Pazopanib in Patients with Advanced Renal Cell Carcinoma (PRINCIPAL Study)
Background: Real-world data are essential to accurately assessing efficacy and toxicity of approved agents in everyday practice. PRINCIPAL, a prospective, observational study, was designed to confirm the real-world safety and efficacy of pazopanib in patients with advanced renal cell carcinoma (RCC). Subjects, Materials, and Methods: Patients with clear cell advanced/metastatic RCC and a clinical decision to initiate pazopanib treatment within 30 days of enrollment were eligible. Primary objectives included progression-free survival (PFS), overall survival (OS), objective response rate (ORR), relative dose intensity (RDI) and its effect on treatment outcomes, change in health-related quality of life (HRQoL), and safety. We also compared characteristics and outcomes of clinical-trial-eligible (CTE) patients, defined using COMPARZ trial eligibility criteria, with those of non-clinical-trial-eligible (NCTE) patients. Secondary study objectives were to evaluate clinical efficacy, safety, and RDI in patient subgroups. Results: Six hundred fifty-seven patients were enrolled and received ≥1 dose of pazopanib. Median PFS and OS were 10.3 months (95% confidence interval [CI], 9.2–12.0) and 29.9 months (95% CI, 24.7 to not reached), respectively, and the ORR was 30.3%. HRQoL showed no or little deterioration over time. Treatment-related serious adverse events (AEs) and AEs of special interest occurred in 64 (9.7%), and 399 (60.7%) patients, respectively. More patients were classified NCTE than CTE (85.2% vs. 14.8%). Efficacy of pazopanib was similar between the two groups. Conclusion: PRINCIPAL confirms the efficacy and safety of pazopanib in patients with advanced/metastatic RCC in a real-world clinical setting. Implications for Practice: PRINCIPAL is the largest (n = 657) prospective, observational study of pazopanib in patients with advanced/metastatic renal cell carcinoma, to the authors’ knowledge. Consistent with clinical trial results that often contain specific patient types, the PRINCIPAL study demonstrated that the effectiveness and safety of pazopanib is similarly safe and effective in patients with advanced kidney cancer in a real-world clinical setting. The PRINCIPAL study showed that patients with advanced kidney cancer who are treated with first-line pazopanib generally do not show disease progression for approximately 10 months and generally survive for nearly 30 months
Impact of depatuxizumab mafodotin on health-related quality of life and neurological functioning in the phase II EORTC 1410/INTELLANCE 2 trial for EGFR-amplified recurrent glioblastoma
Background: In the EORTC 1410/ INTELLANCE 2 randomised, phase II study (NCT02343406), with the antibody-edrug conjugate depatuxizumab mafodotin (Depatux-M, ABT-414) in patients with recurrent EGFR-amplified glioblastoma, the primary end-point (overall survival) was not met, and the drug had ocular dose-limiting toxicity. This study reports results from the prespecified health-related quality of life (HRQoL) and neurological deterioration-free survival (NDFS) exploratory analysis.Patients and methods: Patients (n Z 260) were randomised 1:1:1 to receive either Depatux-M 1.25 mg/kg or 1.0 mg/kg intravenously every 2 weeks with oral temozolomide (TMZ) 150 mg/ m(2), Depatux-M alone, or TMZ or oral lomustine (CCNU) 110 mg/ m(2) ( TMZ/CCNU). HRQoL outcomes were recorded using the EORTC core Quality of Life QLQ-C30, and brain cancer-specific QLQ-BN20 questionnaires. Questionnaires were completed at baseline, weeks 8 and 16, and month 6, and changes from baseline to each time point were calculated. NDFS was defined as time to first deterioration in World Health Organisation performance status.Results: Compliance with HRQoL was 88.1% at baseline and decreased to 37.9% at month 6. Differences from baseline between Depatux-M arms and TMZ/CCNU in global health/QoL status throughout treatment did not reach clinical relevance (>= 10 points). Self-reported visual disorders deteriorated to a clinically relevant extent with Depatux-M arms versus TMZ/CCNU at all timepoints (mean differences range: 24.6-35.1 points). Changes from baseline for other HRQoL scales and NDFS were generally similar between treatment arms.Conclusions: Depatux-M had no impact on HRQoL and NDFS in patients with EGFRamplified recurrent glioblastoma, except for more visual disorders, an expected side- effect of the study drug. (C) 2021 Elsevier Ltd. All rights reserved.Neurolog
A remarkable synergistic effect at the transcriptomic level in peach fruits doubly infected by Prunus necrotic ringspot virus and Peach latent mosaic viroid
[EN] Background: Microarray profiling is a powerful technique to investigate expression changes of large amounts of
genes in response to specific environmental conditions. The majority of the studies investigating gene expression
changes in virus-infected plants are limited to interactions between a virus and a model host plant, which usually is
Arabidopsis thaliana or Nicotiana benthamiana. In the present work, we performed microarray profiling to explore
changes in the expression profile of field-grown Prunus persica (peach) originating from Chile upon single and
double infection with Prunus necrotic ringspot virus (PNRSV) and Peach latent mosaic viroid (PLMVd), worldwide
natural pathogens of peach trees.
Results: Upon single PLMVd or PNRSV infection, the number of statistically significant gene expression changes
was relatively low. By contrast, doubly-infected fruits presented a high number of differentially regulated genes.
Among these, down-regulated genes were prevalent. Functional categorization of the gene expression changes
upon double PLMVd and PNRSV infection revealed protein modification and degradation as the functional category
with the highest percentage of repressed genes whereas induced genes encoded mainly proteins related to
phosphate, C-compound and carbohydrate metabolism and also protein modification. Overrepresentation analysis
upon double infection with PLMVd and PNRSV revealed specific functional categories over- and underrepresented
among the repressed genes indicating active counter-defense mechanisms of the pathogens during infection.
Conclusions: Our results identify a novel synergistic effect of PLMVd and PNRSV on the transcriptome of peach
fruits. We demonstrate that mixed infections, which occur frequently in field conditions, result in a more complex
transcriptional response than that observed in single infections. Thus, our data demonstrate for the first time that
the simultaneous infection of a viroid and a plant virus synergistically affect the host transcriptome in infected
peach fruits. These field studies can help to fully understand plant-pathogen interactions and to develop
appropriate crop protection strategies.We thank Drs M.A. Perez-Amador y J. Gadea for helping in the result analysis. This work was supported by grant BIO2011-25018 from the Spanish granting agency Direccion General de Investigacion Cientifica for the transcriptomic analyses and from the grant 2009CL0020 from the bilateral project INIA-Chile/CSIC-Spain for the phytosanitary evaluation. MC Herranz was the recipient of a contract from the Juan de la Cierva program of the Ministerio de Educacion y Ciencia of Spain.Herranz Gordo, MDC.; Niehl, A.; Rosales, M.; Fiore, N.; Zamorano, A.; Granell Richart, A.; Pallás Benet, V. (2013). A remarkable synergistic effect at the transcriptomic level in peach fruits doubly infected by Prunus necrotic ringspot virus and Peach latent mosaic viroid. Virology Journal. 10:11-15. https://doi.org/10.1186/1743-422X-10-164S111510Pallas V, Garcia JA: How do plant viruses induce disease? Interactions and interference with host components. 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The calcified eggshell matrix proteome of a songbird, the zebra finch (Taeniopygia guttata)
Inhibition of the Multiplication of Tobacco Mosaic Virus by Methyl Benzimidazol-2-yl Carbamate
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