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1.
Eur Phys J C Part Fields ; 84(1): 18, 2024.
Article in English | MEDLINE | ID: mdl-38205101

ABSTRACT

High-precision searches for an electric dipole moment of the neutron (nEDM) require stable and uniform magnetic field environments. We present the recent achievements of degaussing and equilibrating the magnetically shielded room (MSR) for the n2EDM experiment at the Paul Scherrer Institute. We present the final degaussing configuration that will be used for n2EDM after numerous studies. The optimized procedure results in a residual magnetic field that has been reduced by a factor of two. The ultra-low field is achieved with the full magnetic-field-coil system, and a large vacuum vessel installed, both in the MSR. In the inner volume of ∼1.4m3, the field is now more uniform and below 300 pT. In addition, the procedure is faster and dissipates less heat into the magnetic environment, which in turn, reduces its thermal relaxation time from 12h down to 1.5h.

2.
Ann Oncol ; 33(11): 1168-1178, 2022 11.
Article in English | MEDLINE | ID: mdl-35973665

ABSTRACT

BACKGROUND: RET fusions are present in 1%-2% of non-small-cell lung cancer (NSCLC). Pralsetinib, a highly potent, oral, central nervous system-penetrant, selective RET inhibitor, previously demonstrated clinical activity in patients with RET fusion-positive NSCLC in the phase I/II ARROW study, including among treatment-naive patients. We report an updated analysis from the ARROW study. PATIENTS AND METHODS: ARROW is a multi-cohort, open-label, phase I/II study. Eligible patients were ≥18 years of age with locally advanced or metastatic solid tumours and an Eastern Cooperative Oncology Group performance status of 0-2 (later 0-1). Patients initiated pralsetinib at the recommended phase II dose of 400 mg once daily until disease progression, intolerance, consent withdrawal, or investigator's decision. The co-primary endpoints (phase II) were overall response rate (ORR) by blinded independent central review and safety. RESULTS: Between 17 March 2017 and 6 November 2020 (data cut-off), 281 patients with RET fusion-positive NSCLC were enrolled. The ORR was 72% [54/75; 95% confidence interval (CI) 60% to 82%] for treatment-naive patients and 59% (80/136; 95% CI 50% to 67%) for patients with prior platinum-based chemotherapy (enrolment cut-off for efficacy analysis: 22 May 2020); median duration of response was not reached for treatment-naive patients and 22.3 months for prior platinum-based chemotherapy patients. Tumour shrinkage was observed in all treatment-naive patients and in 97% of patients with prior platinum-based chemotherapy; median progression-free survival was 13.0 and 16.5 months, respectively. In patients with measurable intracranial metastases, the intracranial response rate was 70% (7/10; 95% CI 35% to 93%); all had received prior systemic treatment. In treatment-naive patients with RET fusion-positive NSCLC who initiated pralsetinib by the data cut-off (n = 116), the most common grade 3-4 treatment-related adverse events (TRAEs) were neutropenia (18%), hypertension (10%), increased blood creatine phosphokinase (9%), and lymphopenia (9%). Overall, 7% (20/281) discontinued due to TRAEs. CONCLUSIONS: Pralsetinib treatment produced robust efficacy and was generally well tolerated in treatment-naive patients with advanced RET fusion-positive NSCLC. Results from the confirmatory phase III AcceleRET Lung study (NCT04222972) of pralsetinib versus standard of care in the first-line setting are pending.


Subject(s)
Carcinoma, Non-Small-Cell Lung , Lung Neoplasms , Humans , Carcinoma, Non-Small-Cell Lung/drug therapy , Carcinoma, Non-Small-Cell Lung/genetics , Lung Neoplasms/drug therapy , Lung Neoplasms/genetics , Proto-Oncogene Proteins c-ret/genetics , Pyrazoles/therapeutic use , Pyrimidines/adverse effects , Adolescent , Adult
3.
Ann Oncol ; 32(6): 787-800, 2021 06.
Article in English | MEDLINE | ID: mdl-33746047

ABSTRACT

BACKGROUND: Patients with cancer may be at high risk of adverse outcomes from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We analyzed a cohort of patients with cancer and coronavirus 2019 (COVID-19) reported to the COVID-19 and Cancer Consortium (CCC19) to identify prognostic clinical factors, including laboratory measurements and anticancer therapies. PATIENTS AND METHODS: Patients with active or historical cancer and a laboratory-confirmed SARS-CoV-2 diagnosis recorded between 17 March and 18 November 2020 were included. The primary outcome was COVID-19 severity measured on an ordinal scale (uncomplicated, hospitalized, admitted to intensive care unit, mechanically ventilated, died within 30 days). Multivariable regression models included demographics, cancer status, anticancer therapy and timing, COVID-19-directed therapies, and laboratory measurements (among hospitalized patients). RESULTS: A total of 4966 patients were included (median age 66 years, 51% female, 50% non-Hispanic white); 2872 (58%) were hospitalized and 695 (14%) died; 61% had cancer that was present, diagnosed, or treated within the year prior to COVID-19 diagnosis. Older age, male sex, obesity, cardiovascular and pulmonary comorbidities, renal disease, diabetes mellitus, non-Hispanic black race, Hispanic ethnicity, worse Eastern Cooperative Oncology Group performance status, recent cytotoxic chemotherapy, and hematologic malignancy were associated with higher COVID-19 severity. Among hospitalized patients, low or high absolute lymphocyte count; high absolute neutrophil count; low platelet count; abnormal creatinine; troponin; lactate dehydrogenase; and C-reactive protein were associated with higher COVID-19 severity. Patients diagnosed early in the COVID-19 pandemic (January-April 2020) had worse outcomes than those diagnosed later. Specific anticancer therapies (e.g. R-CHOP, platinum combined with etoposide, and DNA methyltransferase inhibitors) were associated with high 30-day all-cause mortality. CONCLUSIONS: Clinical factors (e.g. older age, hematological malignancy, recent chemotherapy) and laboratory measurements were associated with poor outcomes among patients with cancer and COVID-19. Although further studies are needed, caution may be required in utilizing particular anticancer therapies. CLINICAL TRIAL IDENTIFIER: NCT04354701.


Subject(s)
COVID-19 , Neoplasms , Aged , COVID-19 Testing , Female , Humans , Male , Neoplasms/drug therapy , Neoplasms/epidemiology , Pandemics , SARS-CoV-2
4.
Elife ; 92020 12 10.
Article in English | MEDLINE | ID: mdl-33300869

ABSTRACT

Vanishing white matter disease (VWM) is a severe leukodystrophy of the central nervous system caused by mutations in subunits of the eukaryotic initiation factor 2B complex (eIF2B). Current models only partially recapitulate key disease features, and pathophysiology is poorly understood. Through development and validation of zebrafish (Danio rerio) models of VWM, we demonstrate that zebrafish eif2b mutants phenocopy VWM, including impaired somatic growth, early lethality, effects on myelination, loss of oligodendrocyte precursor cells, increased apoptosis in the CNS, and impaired motor swimming behavior. Expression of human EIF2B2 in the zebrafish eif2b2 mutant rescues lethality and CNS apoptosis, demonstrating conservation of function between zebrafish and human. In the mutants, intron 12 retention leads to expression of a truncated eif2b5 transcript. Expression of the truncated eif2b5 in wild-type larva impairs motor behavior and activates the ISR, suggesting that a feed-forward mechanism in VWM is a significant component of disease pathophysiology.


Subject(s)
Disease Models, Animal , Eukaryotic Initiation Factor-2B/genetics , Eukaryotic Initiation Factor-2B/metabolism , Leukoencephalopathies/genetics , Leukoencephalopathies/metabolism , Animals , Humans , Leukoencephalopathies/physiopathology , Mutation , Stress, Physiological/physiology , Zebrafish
5.
Ann Oncol ; 31(3): 412-421, 2020 03.
Article in English | MEDLINE | ID: mdl-32067683

ABSTRACT

BACKGROUND: Systemic therapy options for salivary cancers are limited. MyPathway (NCT02091141), a phase IIa study, evaluates targeted therapies in non-indicated tumor types with actionable molecular alterations. Here, we present the efficacy and safety results for a subgroup of MyPathway patients with advanced salivary gland cancer (SGC) matched to targeted therapies based on tumor molecular characteristics. PATIENTS AND METHODS: MyPathway is an ongoing, multiple basket, open-label, non-randomized, multi-center study. Patients with advanced SGC received pertuzumab + trastuzumab (HER2 alteration), vismodegib (PTCH-1/SMO mutation), vemurafenib (BRAF V600 mutation), or atezolizumab [high tumor mutational burden (TMB)]. The primary endpoint is the objective response rate (ORR). RESULTS: As of January 15, 2018, 19 patients with SGC were enrolled and treated in MyPathway (15 with HER2 amplification and/or overexpression and one each with a HER2 mutation without amplification or overexpression, PTCH-1 mutation, BRAF mutation, and high TMB). In the 15 patients with HER2 amplification/overexpression (with or without mutations) who were treated with pertuzumab + trastuzumab, 9 had an objective response (1 complete response, 8 partial responses) for an ORR of 60% (9.2 months median response duration). The clinical benefit rate (defined by patients with objective responses or stable disease >4 months) was 67% (10/15), median progression-free survival (PFS) was 8.6 months, and median overall survival was 20.4 months. Stable disease was observed in the patient with a HER2 mutation (pertuzumab + trastuzumab, n = 1/1, PFS 11.0 months), and partial responses in patients with the PTCH-1 mutation (vismodegib, n = 1/1, PFS 14.3 months), BRAF mutation (vemurafenib, n = 1/1, PFS 18.5 months), and high TMB (atezolizumab, n = 1/1, PFS 5.5+ months). No unexpected toxicity occurred. CONCLUSIONS: Overall, 12 of 19 patients (63%) with advanced SGC, treated with chemotherapy-free regimens matched to specific molecular alterations, experienced an objective response. Data from MyPathway suggest that matched targeted therapy for SGC has promising efficacy, supporting molecular profiling in treatment determination.


Subject(s)
Breast Neoplasms , Carcinoma , Salivary Gland Neoplasms , Antineoplastic Combined Chemotherapy Protocols , Humans , Molecular Targeted Therapy , Receptor, ErbB-2/genetics , Salivary Gland Neoplasms/drug therapy , Salivary Gland Neoplasms/genetics , Salivary Glands , Trastuzumab
6.
Drugs Today (Barc) ; 55(10): 641-652, 2019 Oct.
Article in English | MEDLINE | ID: mdl-31720561

ABSTRACT

ROS1 gene fusions account for approximately 1-2% of all cases of non-small cell lung cancer (NSCLC). Similarly to anaplastic lymphoma kinase (ALK)-positive NSCLC, patients with ROS1+ NSCLC tend to have minimal smoking and be of the female sex. In most cases, adenocarcinoma is the dominant histology. The ROS1 gene has homology to ALK and this structural similarity formed the basis for utilizing ALK inhibitors for ROS1+ NSCLC. On the basis of impressive progression-free survival of 19.2 months from the PROFILE 1001 trial, crizotinib obtained Food and Drug Administration (FDA) approval as first-line therapy for treatment of ROS1+ NSCLC. Since then, there has been a growing appreciation of the incidence of brain metastases in ROS1+ NSCLC and rates of central nervous system progression on crizotinib. Additionally, appreciation of novel resistance mechanisms to crizotinib has led to the development of newer tyrosine kinase inhibitors (TKIs). In this review, we highlight known and emerging TKIs for the management of ROS1+ NSCLC.


Subject(s)
Carcinoma, Non-Small-Cell Lung/drug therapy , Lung Neoplasms/drug therapy , Molecular Targeted Therapy , Protein-Tyrosine Kinases/genetics , Proto-Oncogene Proteins/genetics , Anaplastic Lymphoma Kinase/antagonists & inhibitors , Humans , Protein Kinase Inhibitors/therapeutic use
7.
Drugs Today (Barc) ; 54(11): 695-704, 2018 Nov.
Article in English | MEDLINE | ID: mdl-30539168

ABSTRACT

Anaplastic thyroid cancer is a rare but extremely aggressive type of thyroid cancer. Treatment typically consists of surgery, external beam radiotherapy and cytotoxic chemotherapy. However, available literature suggests only modest survival benefit for cytotoxic chemotherapy. Recent advances have suggested the combination of BRAF and MEK inhibition may have a profound and durable effect on patients with BRAFV600E-mutated anaplastic thyroid cancer, with a response rate of 69%. Other systemic treatments, including immunotherapies, have also shown promising but more limited results. Many clinical trials assessing the efficacy of kinase inhibitors and immunotherapies are currently ongoing.


Subject(s)
Antineoplastic Agents, Immunological/therapeutic use , Biomarkers, Tumor/antagonists & inhibitors , Protein Kinase Inhibitors/therapeutic use , Thyroid Carcinoma, Anaplastic/drug therapy , Thyroid Neoplasms/drug therapy , Animals , Antineoplastic Agents, Immunological/adverse effects , Biomarkers, Tumor/genetics , Biomarkers, Tumor/immunology , Biomarkers, Tumor/metabolism , Drug Resistance, Neoplasm , Genetic Predisposition to Disease , Humans , Molecular Targeted Therapy , Phenotype , Protein Kinase Inhibitors/adverse effects , Signal Transduction/drug effects , Thyroid Carcinoma, Anaplastic/enzymology , Thyroid Carcinoma, Anaplastic/genetics , Thyroid Carcinoma, Anaplastic/immunology , Thyroid Neoplasms/enzymology , Thyroid Neoplasms/genetics , Thyroid Neoplasms/immunology , Treatment Outcome
8.
Drugs Today (Barc) ; 54(9): 535-545, 2018 Sep.
Article in English | MEDLINE | ID: mdl-30303494

ABSTRACT

Curative therapies for radioiodine-refractory differentiated thyroid cancer remain lacking. However, oral multikinase inhibitors often allow for disease control and improved progression-free survival. Two agents, lenvatinib and sorafenib, have been approved for radioiodine-refractory differentiated thyroid cancer on the basis of phase III clinical trials showing marked response rates and improved progression-free survival over placebo. Several other multikinase inhibitors, including apatinib, axitinib, cabozantinib, pazopanib, sunitinib and vandetanib, have also been studied in phase II clinical trials, with varying response rates and comparable progression-free survival. Selective kinase inhibitors, including dabrafenib, vemurafenib, selumetinib and gefitinib, offer a more targeted approach and have also been studied in phase II clinical trials. While the emergence of these treatments has changed the landscape of management of advanced thyroid cancer, clinical challenges remain, and there are many areas of ongoing research.


Subject(s)
Antineoplastic Agents/therapeutic use , Protein Kinase Inhibitors/therapeutic use , Thyroid Neoplasms/drug therapy , Clinical Trials as Topic , Humans , Thyroid Neoplasms/mortality
9.
PLoS One ; 13(3): e0193180, 2018.
Article in English | MEDLINE | ID: mdl-29543903

ABSTRACT

Zebrafish are a valuable model organism in biomedical research. Their rapid development, ability to model human diseases, utility for testing genetic variants identified from next-generation sequencing, amenity to CRISPR mutagenesis, and potential for therapeutic compound screening, has led to their wide-spread adoption in diverse fields of study. However, their power for large-scale screens is limited by the absence of automated genotyping tools for live animals. This constrains potential drug screen options, limits analysis of embryonic and larval phenotypes, and requires raising additional animals to adulthood to ensure obtaining an animal of the desired genotype. Our objective was to develop an automated system that would rapidly obtain cells and DNA from zebrafish embryos and larvae for genotyping, and that would keep the animals alive. We describe the development, testing, and validation of a zebrafish embryonic genotyping device, termed "ZEG" (Zebrafish Embryo Genotyper). Using microfluidic harmonic oscillation of the animal on a roughened glass surface, the ZEG is able to obtain genetic material (cells and DNA) for use in genotyping, from 24 embryos or larvae simultaneously in less than 10 minutes. Loading and unloading of the ZEG is performed manually with a standard pipette tip or transfer pipette. The obtained genetic material is amplified by PCR and can be used for subsequent analysis including sequencing, gel electrophoresis, or high-resolution melt-analysis. Sensitivity of genotyping and survival of animals are both greater than 90%. There are no apparent effects on body morphology, development, or motor behavior tests. In summary, the ZEG device enables rapid genotyping of live zebrafish embryos and larvae, and animals are available for downstream applications, testing, or raising.


Subject(s)
Automation , Cell Separation/methods , Genotyping Techniques/methods , Microfluidic Analytical Techniques/methods , Zebrafish/embryology , Zebrafish/genetics , Animals
10.
Hum Mol Genet ; 26(18): 3600-3614, 2017 09 15.
Article in English | MEDLINE | ID: mdl-28911205

ABSTRACT

X-linked adrenoleukodystrophy (ALD) is a devastating inherited neurodegenerative disease caused by defects in the ABCD1 gene and affecting peripheral and central nervous system myelin. ABCD1 encodes a peroxisomal transmembrane protein required for very long chain fatty acid (VLCFA) metabolism. We show that zebrafish (Danio rerio) Abcd1 is highly conserved at the amino acid level with human ABCD1, and during development is expressed in homologous regions including the central nervous system and adrenal glands. We used TALENs to generate five zebrafish abcd1 mutant allele lines introducing premature stop codons in exon 1, as well as obtained an abcd1 allele from the Zebrafish Mutation Project carrying a point mutation in a splice donor site. Similar to patients with ALD, zebrafish abcd1 mutants have elevated VLCFA levels. Interestingly, we found that CNS development of the abcd1 mutants is disrupted, with hypomyelination in the spinal cord, abnormal patterning and decreased numbers of oligodendrocytes, and increased cell death. By day of life five abcd1 mutants demonstrate impaired motor function, and overall survival to adulthood of heterozygous and homozygous mutants is decreased. Expression of human ABCD1 in oligodendrocytes rescued apoptosis in the abcd1 mutant. In summary, we have established a zebrafish model of ALD that recapitulates key features of human disease pathology and which reveals novel features of underlying disease pathogenesis.


Subject(s)
ATP Binding Cassette Transporter, Subfamily D, Member 1/metabolism , Adrenoleukodystrophy/genetics , ATP Binding Cassette Transporter, Subfamily D, Member 1/genetics , ATP-Binding Cassette Transporters/genetics , Adrenoleukodystrophy/metabolism , Alleles , Animals , Cells, Cultured , Disease Models, Animal , Exons , Fatty Acids/genetics , Fatty Acids/metabolism , Genetic Diseases, X-Linked/genetics , Genetic Diseases, X-Linked/metabolism , Humans , Mutation , Myelin Sheath/genetics , Myelin Sheath/metabolism , Oligodendroglia/metabolism , Zebrafish
11.
Ann Oncol ; 28(10): 2539-2546, 2017 Oct 01.
Article in English | MEDLINE | ID: mdl-28961851

ABSTRACT

BACKGROUND: Relapsed/metastatic salivary gland carcinomas (SGCs) have a wide diversity of histologic subtypes associated with variable clinical aggressiveness and response to local and systemic therapies. We queried whether comprehensive genomic profiling could define the tumor subtypes and uncover clinically relevant genomic alterations, revealing new routes to targeted therapies for patients with relapsed and metastatic disease. PATIENTS AND METHODS: From a series of 85 686 clinical cases, DNA was extracted from 40 µm of formalin-fixed paraffin embedded (FFPE) sections for 623 consecutive SGC. CGP was carried out on hybridization-captured, adaptor ligation-based libraries (mean coverage depth, >500×) for up to 315 cancer-related genes. Tumor mutational burden was determined on 1.1 Mb of sequenced DNA. All classes of alterations, base substitutions, short insertions/deletions, copy number changes, and rearrangements/fusions were determined simultaneously. RESULTS: The clinically more indolent SGC including adenoid cystic carcinoma, acinic cell carcinoma, polymorphous low-grade adenocarcinoma, mammary analog secretory carcinoma, and epithelial-myoepithelial carcinomas have significantly fewer genomic alterations, TP53 mutations, and lower tumor mutational burden than the typically more aggressive SGCs including mucoepidermoid carcinoma, salivary duct carcinoma, adenocarcinoma, not otherwise specified, carcinoma NOS, and carcinoma ex pleomorphic adenoma. The more aggressive SGCs are commonly driven by ERBB2 PI3K pathway genomic alterations. Additional targetable GAs are frequently seen. CONCLUSIONS: Genomic profiling of SGCs demonstrates important differences between traditionally indolent and aggressive cancers. These differences may provide therapeutic options in the future.


Subject(s)
Carcinoma/genetics , Neoplasm Recurrence, Local/genetics , Salivary Gland Neoplasms/genetics , Aged , Carcinoma/pathology , DNA, Neoplasm/genetics , Female , Formaldehyde , Gene Expression Profiling , Humans , Male , Middle Aged , Neoplasm Metastasis , Neoplasm Recurrence, Local/pathology , Paraffin Embedding , Salivary Gland Neoplasms/pathology , Tissue Fixation
12.
Drugs Today (Barc) ; 53(5): 299-307, 2017 May.
Article in English | MEDLINE | ID: mdl-28650002

ABSTRACT

In the last several years, many new drugs have been approved to treat metastatic renal cell carcinoma (RCC). Cabozantinib is a novel multikinase inhibitor with activity against vascular endothelial growth factor receptor (VEGFR), proto-oncogene tyrosine-protein kinase receptor Ret and other kinases that recently joined this impressive list of approved agents. Cabozantinib is an active agent in the preclinical and clinical setting, having recently demonstrated superiority over everolimus in a blinded, randomized phase III study of patients with progressive RCC after at least one prior line of antiangiogenic therapy. This agent's toxicity profile is similar to those of other multikinase inhibitors approved to treat RCC. This review will explore cabozantinib's pharmacologic and safety profile and its preclinical and clinical activity in RCC.


Subject(s)
Anilides/therapeutic use , Antineoplastic Agents/therapeutic use , Carcinoma, Renal Cell/drug therapy , Kidney Neoplasms/drug therapy , Protein Kinase Inhibitors/therapeutic use , Pyridines/therapeutic use , Anilides/adverse effects , Anilides/pharmacokinetics , Animals , Antineoplastic Agents/adverse effects , Antineoplastic Agents/pharmacokinetics , Carcinoma, Renal Cell/enzymology , Carcinoma, Renal Cell/pathology , Drug Interactions , Humans , Kidney Neoplasms/enzymology , Kidney Neoplasms/pathology , Protein Kinase Inhibitors/adverse effects , Protein Kinase Inhibitors/pharmacokinetics , Proto-Oncogene Mas , Pyridines/adverse effects , Pyridines/pharmacokinetics , Treatment Outcome
13.
Ann Oncol ; 28(4): 748-753, 2017 04 01.
Article in English | MEDLINE | ID: mdl-28327999

ABSTRACT

Background: We sought to identify genomic alterations (GAs) in salivary mucoepidermoid carcinomas. Patients and methods: DNA was extracted from 48 mucoepidermoid carcinomas. Comprehensive genomic profiling (CGP) including the calculation to tumor mutational burden (TMB) was performed on hybridization-captured adaptor ligation-based libraries of 315 cancer-related genes plus introns from 28 genes frequently rearranged for cancer and evaluated for all classes of GAs. Results: A total of 183 GAs were found in 80 unique genes. High-grade tumors had more GAs (mean 5 ± 3.8) compared with low (2.3 ± 1.4) or intermediate (2.6 ± 1.5) (P = 0.019). TP53 GAs were seen in all tumor grades (41.7%) but were most common in high-grade malignancies (56%) (P = 0.047). CDKN2A GAs were seen in 41.6% of tumors. PI3K/mTOR pathway activation, including PI3KCA mutations, were more common in high grade (52%) than in low- and intermediate-grade tumors (4.3%) (P = 0.007). BAP1 GAs were observed in 20.8% of tumors and BRCA1/2 GAs present in 10.5% of specimens. ERBB2 amplifications were seen in only 8.3% of tumors. The TMB for this patient group was relatively low with only 5 (10%) of cases having greater than 10 mutations/megabase of sequenced DNA. Conclusion: CGP of salivary mucoepidermoid carcinomas revealed diverse GAs that may lead to customized treatment options for patients with these rare tumors.


Subject(s)
Carcinoma, Mucoepidermoid/genetics , Phosphatidylinositol 3-Kinases/genetics , Salivary Gland Neoplasms/genetics , Tumor Suppressor Proteins/genetics , Ubiquitin Thiolesterase/genetics , Adult , Aged , Aged, 80 and over , Class I Phosphatidylinositol 3-Kinases , DNA Mutational Analysis , Female , Gene Expression Profiling , High-Throughput Nucleotide Sequencing , Humans , Male , Middle Aged , Mutation
14.
Oncogene ; 35(3): 290-300, 2016 Jan 21.
Article in English | MEDLINE | ID: mdl-25893296

ABSTRACT

The limitations of cancer cell lines have led to the development of direct patient-derived xenograft models. However, the interplay between the implanted human cancer cells and recruited mouse stromal and immune cells alters the tumor microenvironment and limits the value of these models. To overcome these constraints, we have developed a technique to expand human hematopoietic stem and progenitor cells (HSPCs) and use them to reconstitute the radiation-depleted bone marrow of a NOD/SCID/IL2rg(-/-) (NSG) mouse on which a patient's tumor is then transplanted (XactMice). The human HSPCs produce immune cells that home into the tumor and help replicate its natural microenvironment. Despite previous passage on nude mice, the expression of epithelial, stromal and immune genes in XactMice tumors aligns more closely to that of the patient tumor than to those grown in non-humanized mice-an effect partially facilitated by human cytokines expressed by both the HSPC progeny and the tumor cells. The human immune and stromal cells produced in the XactMice can help recapitulate the microenvironment of an implanted xenograft, reverse the initial genetic drift seen after passage on non-humanized mice and provide a more accurate tumor model to guide patient treatment.


Subject(s)
Head and Neck Neoplasms/genetics , Hematopoietic Stem Cells/pathology , Tumor Microenvironment/genetics , Xenograft Model Antitumor Assays/methods , Animals , Bone Marrow/pathology , Cell Line, Tumor , Cytokines/biosynthesis , Disease Models, Animal , Gene Expression Regulation, Neoplastic , Head and Neck Neoplasms/pathology , Humans , Mice
15.
J Biomed Sci Eng ; 8(11): 789-796, 2015.
Article in English | MEDLINE | ID: mdl-26702331

ABSTRACT

OBJECTIVE: The aim was to determine if endothelial VCAM-1 (eVCAM-1) expression in the common carotid artery (CCA) would correlate with predictive markers of atherosclerotic disease, would precede reduction of markers of endothelial cell function and would predict coronary artery disease (CAD). METHODS AND RESULTS: Carotid arterial segments (bifurcation, proximal and distal CCA) were harvested from 14 and 24 month-old male castrated familial hypercholesterolemic (FH) swine, a model of spontaneous atherosclerosis. Quantification of local expression of eVCAM-1, intimal macrophage accumulation, oxidative stress, intima-media (I/M) ratio, intima-media thickness (IMT), endothelial nitric oxide synthase (eNOS) and phosphorylated eNOS (p-eNOS) in selected regions of the carotids revealed a relationship between local inflammation and atheroscle-rotic plaque progression. Importantly, inflammation was not uniform throughout the CCA. Endo-thelial VCAM-1 expression was the greatest at the bifurcation and increased with age. Finally, eV-CAM-1 best estimated the severity of CAD compared to blood levels of glucose, hypercholestero-lemia, carotid IMT, and p-eNOS. CONCLUSION: Our data suggested that eVCAM-1 was closely associated with atherosclerotic plaque progression and preceded impairment of EDD. Thus, this study supported the use of carotid VCAM-1 targeting agents to estimate the severity of CAD.

16.
Gesundheitswesen ; 77(1): 46-52, 2015 Jan.
Article in German | MEDLINE | ID: mdl-24806594

ABSTRACT

AIM: Due to demographic trends towards an ageing population resource use of health care will increase. By collecting health-related costs via questionnaires, the impact of socio-economic variables and other medical factors can be examined. In addition, only patient reported resource use accounts for out-of-pocket payments. Thus, it is necessary to develop an appropriate tool to collect the health-related resource use in an elderly population. METHODS: The development of the FIMA (questionnaire for the use of medical and non-medical services in old age) was carried out in 6 steps. These included the determination of necessary questionnaire contents based on a literature review and the wording and layout were defined. Finally the questionnaire was tested in a pilot study and was modified. RESULTS: All direct medical and non-medical resource use excluding transportation and time costs were recorded. Productivity losses were not included. The recall time frames differed according to resource categories (7 days, 3 months, 12 months). For the pilot study, 63 questionnaires were analysed. The response rate was 69%. The questionnaire took an average of 21 min to complete. Three quarters of respondents completed the questionnaire without help and 90% rated the difficulty as easy or even very simple. There was good agreement between self-reported health-related quality of life and the resource use of nursing and domestic help (phi coefficient values between 0.52 and 0.58). CONCLUSION: The FIMA is a generic questionnaire which collects the health-related resource use within the older population groups.


Subject(s)
Health Expenditures/statistics & numerical data , Health Services for the Aged/economics , Health Services for the Aged/statistics & numerical data , Surveys and Questionnaires , Utilization Review/economics , Utilization Review/methods , Aged , Aged, 80 and over , Female , Germany , Humans , Male , Pilot Projects , Reproducibility of Results , Sensitivity and Specificity
17.
Gesundheitswesen ; 77(1): 53-61, 2015 Jan.
Article in German | MEDLINE | ID: mdl-25025287

ABSTRACT

PURPOSE: Due to demographic aging, economic evaluation of health care technologies for the elderly becomes more important. A standardised questionnaire to measure the health-related resource utilisation has been designed. The monetary valuation of the resource use documented by the questionnaire is a central step towards the determination of the corresponding costs. The aim of this paper is to provide unit costs for the resources in the questionnaire from a societal perspective. METHODS: The unit costs are calculated pragmatically based on regularly published sources. Thus, an easy update is possible. RESULTS: This paper presents the calculated unit costs for outpatient medical care, inpatient care, informal and formal nursing care and pharmaceuticals from a societal perspective. CONCLUSION: The calculated unit costs can serve as a reference case in health economic evaluations and hence help to increase their comparability.


Subject(s)
Costs and Cost Analysis/standards , Delivery of Health Care/economics , Health Care Costs/statistics & numerical data , Health Care Costs/standards , Health Services for the Aged/economics , Health Services/economics , Costs and Cost Analysis/economics , Germany , Health Services/statistics & numerical data , Health Services for the Aged/standards , Models, Economic , Reference Values , Utilization Review/economics , Utilization Review/standards
18.
Public Health ; 128(3): 274-81, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24559770

ABSTRACT

OBJECTIVE: Failure of closure of the neural tube often leads to serious malformations, including spina bifida, anencephaly and encephalocoele. Despite improvements in medical and surgical treatment, the burden associated with spina bifida is substantial but country-specific data are lacking outside North America. This study aims to improve understanding of the economic implications and burden associated with the morbidity of children and adults with neural tube defects (NTDs) in Germany. STUDY DESIGN: Retrospective data analysis. METHODS: 2006-2009 German health insurance data of persons with NTDs (spina bifida and encephalocoele) were analysed to determine the economic burden of illness associated with NTDs in Germany. Cases were identified using ICD-10 codes; data included outpatient and inpatient care, rehabilitation, remedies and medical aids, pharmacotherapy use, long-term care and information on sick leave. The analysis was stratified by age group to provide a burden estimate specific to a person's age. To obtain an indicator of incremental burden to the Statutory Health Insurance (SHI), results were compared to the standardized healthcare expenditures according to the German Risk Compensation Scheme (RSA). RESULTS: Overall, 4141 persons with an ICD code related to NTDs were identified (out of a population of 7.28 million persons screened). The administrative prevalence ranged from 0.54 to 0.58 per 1000 enrollees. Of those, 3952 (95.4%) were diagnosed with spina bifida. The average annual mean healthcare expenditure of persons with spina bifida was €4532 (95% CI = 4375-4689, SD = 9590, Median = 1000), with inpatient care contributing €1358 (30.0%), outpatient care €644 (14.2%), rehabilitation €29 (0.6%), pharmacotherapy €562 (12.4%), and remedies and medical aids €1939 (42.8%). The incremental cost due to spina bifida was substantially higher than the standardized SHI expenditures for all age groups. The difference was highest for persons ≤ 10 years old (€10,971 vs €2360 for the age group ≤ 1, €8599 vs €833 for the age group 2-5 years and €10,601 vs €863 for the age group 6-10 years). The difference was smallest for the age group 41-50 years (€2524 vs €1101) and for 71 years and over (€5278 vs €4389). CONCLUSION: Expenditures of persons with spina bifida exceeded the standardized SHI expenditures, indicating a considerable economic burden. The economic burden is continuous throughout the person's life, with high monetary impact and exposure to the healthcare system (especially in early years of life). Efforts should be devoted to improve the prevention of NTDs and provide appropriate support for persons with NTDs, parents, and caregivers--especially in early years.


Subject(s)
Cost of Illness , Neural Tube Defects/economics , Adolescent , Adult , Aged , Child , Child, Preschool , Delivery of Health Care/economics , Female , Germany/epidemiology , Health Expenditures/statistics & numerical data , Humans , Infant , Insurance, Health/economics , International Classification of Diseases , Male , Middle Aged , Neural Tube Defects/epidemiology , Prevalence , Retrospective Studies , Young Adult
20.
Drugs Today (Barc) ; 49(9): 523-35, 2013 Sep.
Article in English | MEDLINE | ID: mdl-24086949

ABSTRACT

Epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) are valuable treatments for EGFR-mutated non-small cell lung cancer (NSCLC). Anti-EGFR antibodies are widely used in the treatment of head and neck squamous cell carcinomas (HNSCC) and in KRAS wild-type colorectal cancer. The first-generation, reversible EGFR inhibitors erlotinib and gefitinib in the first-line setting provide superior progression-free survival and quality of life compared to conventional chemotherapy in NSCLC harboring activating EGFR mutations. However, these therapies eventually fail and new options are needed. Afatinib is a novel irreversible inhibitor of the ErbB family members EGFR, tyrosine kinase-type cell surface receptors HER2 and HER4. It shows preclinical efficacy in NSCLC with common EGFR-activating mutations and the T790M mutation typically associated with EGFR TKI resistance. Preclinical activity is seen in other tumor types as well, including HNSCC. Clinically, afatinib has been evaluated in the broad-reaching LUX Lung trial program, with significant activity seen in the first and later-line settings. It is also under investigation in multiple other tumor types. This review will stress on afatinib's preclinical pharmacology, pharmacokinetics and clinical activity with a focus on NSCLC.


Subject(s)
Carcinoma, Non-Small-Cell Lung/drug therapy , Lung Neoplasms/drug therapy , Quinazolines/therapeutic use , Afatinib , Animals , Antineoplastic Agents/adverse effects , Antineoplastic Agents/pharmacology , Antineoplastic Agents/therapeutic use , Carcinoma, Non-Small-Cell Lung/genetics , Drug Evaluation, Preclinical , Drug Interactions , Drug Resistance, Neoplasm , ErbB Receptors/genetics , Humans , Lung Neoplasms/genetics , Quality of Life , Quinazolines/adverse effects , Quinazolines/pharmacology
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