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1.
Gynecol Oncol ; 178: 161-169, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37890345

RESUMO

OBJECTIVE: This study assessed the efficacy, safety, and health-related quality of life (HRQoL) of the treatment regimen of dostarlimab, a programmed death-1 inhibitor, combined with niraparib, a poly (ADP-ribose) polymerase inhibitor, in patients with BRCA wild type (BRCAwt) recurrent platinum-resistant ovarian cancer (PROC) who had previously received bevacizumab treatment. METHODS: This Phase II, open-label, single-arm, multicenter study, conducted in the USA, enrolled patients with recurrent PROC to receive niraparib and dostarlimab until disease progression or unacceptable toxicity (up to 3 years). A preplanned interim futility analysis was performed after the first 41 patients had undergone ≥1 radiographic evaluation (approximately 9 weeks from the first treatment). RESULTS: The prespecified interim futility criterion was met and the study was therefore terminated. For the 41 patients assessed, the objective response rate (ORR) was 7.3% (95% confidence interval: 1.5-19.9); no patients achieved a complete response, 3 patients (7.3%) achieved a partial response (duration of response; 3.0, 3.8, and 9.2 months, respectively), and 9 patients (22.0%) had stable disease. In total, 39 patients (95.1%) experienced a treatment-related adverse event, but no new safety issues were observed. HRQoL, assessed using FOSI, or Functional Assessment of Cancer Therapy - Ovarian Symptom Index scores, worsened over time compared with baseline scores. CONCLUSIONS: The study was terminated due to the observed ORR at the interim futility analysis. This highlights a need for effective therapies in treating patients with recurrent BRCAwt PROC.


Assuntos
Antineoplásicos , Neoplasias Ovarianas , Humanos , Feminino , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/induzido quimicamente , Qualidade de Vida , Carcinoma Epitelial do Ovário/tratamento farmacológico , Antineoplásicos/uso terapêutico , Indazóis/efeitos adversos , Inibidores de Poli(ADP-Ribose) Polimerases/efeitos adversos , Recidiva Local de Neoplasia/tratamento farmacológico
2.
Am Fam Physician ; 101(4): 213-220, 2020 02 15.
Artigo em Inglês | MEDLINE | ID: mdl-32053326

RESUMO

Cerebral palsy, which occurs in two to three out of 1,000 live births, has multiple etiologies resulting in brain injury that affects movement, posture, and balance. The movement disorders associated with cerebral palsy are categorized as spasticity, dyskinesia, ataxia, or mixed/other. Spasticity is the most common movement disorder, occurring in 80% of children with cerebral palsy. Movement disorders of cerebral palsy can result in secondary problems, including hip pain or dislocation, balance problems, hand dysfunction, and equinus deformity. Diagnosis of cerebral palsy is primarily clinical, but magnetic resonance imaging can be helpful to confirm brain injury if there is no clear cause for the patient's symptoms. Once cerebral palsy has been diagnosed, an instrument such as the Gross Motor Function Classification System can be used to evaluate severity and treatment response. Treatments for the movement disorders associated with cerebral palsy include intramuscular onabotulinumtoxinA, systemic and intrathecal muscle relaxants, selective dorsal rhizotomy, and physical and occupational therapies. Patients with cerebral palsy often also experience problems unrelated to movement that need to be managed into adulthood, including cognitive dysfunction, seizures, pressure ulcers, osteoporosis, behavioral or emotional problems, and speech and hearing impairment.


Assuntos
Paralisia Cerebral , Paralisia Cerebral/diagnóstico , Paralisia Cerebral/etiologia , Paralisia Cerebral/fisiopatologia , Paralisia Cerebral/terapia , Terapia Combinada , Humanos
3.
Gynecol Oncol ; 145(1): 37-40, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28139261

RESUMO

OBJECTIVE: The aim of this study was to evaluate the activity of bevacizumab in a cohort of women with recurrent low-grade serous carcinoma of the ovary or peritoneum. METHODS: This single-institution retrospective study assessed all patients at MD Anderson Cancer Center with recurrent low-grade serous ovarian or peritoneal cancer who received bevacizumab from 2007 to 2016. Study endpoints included best response, median progression-free survival, median overall survival, and toxicity. RESULTS: Forty patients received 45 separate "patient-regimens." Most received bevacizumab in combination with chemotherapy. Complete response (CR) was seen in 7.5%, while 40% had partial responses (PR) and 30% achieved stable disease (SD). Disease progression occurred in nine patients (22.5%). Overall response rate (CR+PR) to bevacizumab-containing regimens was 47.5%. Clinical benefit (CR+PR+SD) was seen in 77.5% of patients. Median progression free survival was 10.2months (95% CI 7.9, 12.4). Median overall survival was 34.6months (95% CI 29.5, 39.7). Fifteen patients discontinued bevacizumab related to toxicity. CONCLUSIONS: Bevacizumab, most often in combination with chemotherapy, has activity in recurrent low-grade ovarian cancer and should be considered a treatment option for these patients. Further investigation into the most effective chemotherapeutic agent in combination with bevacizumab is warranted.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Recidiva Local de Neoplasia/tratamento farmacológico , Neoplasias Císticas, Mucinosas e Serosas/tratamento farmacológico , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Peritoneais/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , Inibidores da Aromatase/administração & dosagem , Bevacizumab/administração & dosagem , Carboplatina/administração & dosagem , Ciclofosfamida/administração & dosagem , Bases de Dados Factuais , Desoxicitidina/administração & dosagem , Desoxicitidina/análogos & derivados , Intervalo Livre de Doença , Feminino , Humanos , Pessoa de Meia-Idade , Niacinamida/administração & dosagem , Niacinamida/análogos & derivados , Paclitaxel/administração & dosagem , Compostos de Fenilureia/administração & dosagem , Estudos Retrospectivos , Sorafenibe , Adulto Jovem , Gencitabina
4.
J Minim Invasive Gynecol ; 22(4): 687-90, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25772021

RESUMO

Ovarian transposition has proven to be a safe method for preserving ovarian function in young premenopausal women who require pelvic irradiation for treatment of early stage malignancies. We report 2 cases of ovarian torsion after laparoscopic ovarian transposition in 2 young women scheduled for chemotherapy and radiation therapy for treatment of cervical or vaginal cancer. We believe these are the first such cases reported in the literature. In discussions with patients regarding the risks and potential benefits of ovarian transposition, ovarian torsion should be included as a possible, although rare, complication.


Assuntos
Infertilidade Feminina/prevenção & controle , Laparoscopia , Tratamentos com Preservação do Órgão , Doenças Ovarianas/patologia , Ovário/patologia , Pelve/efeitos da radiação , Torção Mecânica , Adulto , Quimiorradioterapia Adjuvante , Aconselhamento Diretivo , Feminino , Humanos , Ovário/efeitos da radiação , Ovário/cirurgia , Pré-Menopausa , Resultado do Tratamento , Neoplasias do Colo do Útero/patologia , Neoplasias do Colo do Útero/cirurgia
5.
Am J Health Syst Pharm ; 81(7): e180-e185, 2024 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-38070166

RESUMO

PURPOSE: Pharmacist-driven transitions of care interventions have been shown to improve patient clinical outcomes. However, the evidence in the literature on the impact of pharmacy transitions of care services on hospitalization and emergency department visit rates is inconclusive. The purpose of this study is to determine the impact of a pharmacist-driven transitions of care program on hospitalization and emergency department visit rates at an academic medical center. METHODS: This retrospective observational cohort study was conducted via pre- and postintervention analyses. The data collection period included 30 days before the date of pharmacist intervention and 30 days after the date of intervention. The study evaluated patients who were enrolled in the Transitional Inpatient Rounding Experience (TIRE) program at Wake Forest Baptist Health between August 2017 and September 2020. Patients excluded were less than 18 years old, in hospice care, discharged to long-term care, or did not have a hospitalization within 90 days of intervention. The Wilcoxon signed rank test was utilized to analyze continuous data. Standard descriptive statistics were used for categorical data. RESULTS: One hundred patients met the inclusion criteria for this study. For the primary outcome, the TIRE intervention resulted in a reduction of 31 hospitalizations, or 50% (62 prior hospitalizations in the 30 days before the intervention vs 31 admissions in the 30 days after the intervention; P < 0.001). There were significant reductions in the secondary outcomes of 90-day hospitalizations (24% fewer with intervention; P = 0.028) and 30-day emergency department visits (65% fewer with intervention; P =0.006). For the outcome of 90-day emergency department visits, there was a 36% reduction (P = 0.240). CONCLUSION: The results of the study demonstrate that a pharmacy transitions of care program may lead to a reduction in hospitalization and emergency department visit rates. The study also found potential cost savings associated with a pharmacy transitions of care program.


Assuntos
Assistência Farmacêutica , Farmácia , Humanos , Hospitalização , Alta do Paciente , Estudos Retrospectivos , Adulto
6.
NPJ Sci Food ; 8(1): 3, 2024 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-38191473

RESUMO

Penicillium roqueforti is used worldwide in the production of blue-veined cheese. The blue-green colour derives from pigmented spores formed by fungal growth. Using a combination of bioinformatics, targeted gene deletions, and heterologous gene expression we discovered that pigment formation was due to a DHN-melanin biosynthesis pathway. Systematic deletion of pathway genes altered the arising spore colour, yielding white to yellow-green to red-pink-brown phenotypes, demonstrating the potential to generate new coloured strains. There was no consistent impact on mycophenolic acid production as a result of pathway interruption although levels of roquefortine C were altered in some deletants. Importantly, levels of methyl-ketones associated with blue-cheese flavour were not impacted. UV-induced colour mutants, allowed in food production, were then generated. A range of colours were obtained and certain phenotypes were successfully mapped to pathway gene mutations. Selected colour mutants were subsequently used in cheese production and generated expected new colourations with no elevated mycotoxins, offering the exciting prospect of use in future cheese manufacture.

7.
Gynecol Oncol ; 128(3): 506-11, 2013 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-23200915

RESUMO

OBJECTIVES: Gene methylation and other epigenetic modifications of gene regulation have been implicated in the growth of ovarian cancer, but the clinical significance of such modifications in the Notch pathway in high-grade serous ovarian cancer (HGS-OvCa) is not well understood. We used The Cancer Genome Atlas (TCGA) data to study the clinical relevance of epigenetic modifications of Notch superfamily genes. METHODS: We analyzed the interaction of DNA methylation and miRNAs with gene expression data for Notch superfamily members with the Spearman rank correlation test and explored potential relationships with overall survival (OS) with the log-rank test. We downloaded clinical data, level 3 gene expression data, and level 3 DNA methylation data for 480 patients with stage II-IV HGS-OvCa from the TCGA data portal. Patients were randomly divided into training and validation cohorts for survival analyses. In each set, patients were grouped into percentiles according to methylation and microRNA (miRNA) or messenger RNA (mRNA) levels. We used several algorithms to predict miRNA-mRNA interaction. RESULTS: There were significant inverse relationships between methylation status and mRNA expression for PPARG, CCND1, and RUNX1. For each of these genes, patients with a lower methylation level and higher expression level had significantly poorer OS than did patients with a higher methylation level and lower expression level. We also found a significant inverse relationship between miRNAs and mRNA expression for CCND1, PPARG, and RUNX1. By further analyzing the effect of miRNAs on gene expression and OS, we found that patients with higher levels of CCND1, PPARG, and RUNX1 expression and lower expression levels of their respective miRNAs (502-5p, 128, and 215/625) had significantly poorer OS. CONCLUSIONS: Epigenetic alterations of multiple Notch target genes and pathway interacting genes (PPARG, CCND1, and RUNX1) may relate to activation of this pathway and poor survival of patients with HGS-OvCa.


Assuntos
Cistadenocarcinoma Seroso/genética , Neoplasias Ovarianas/genética , Receptores Notch/genética , Subunidade alfa 2 de Fator de Ligação ao Core/biossíntese , Subunidade alfa 2 de Fator de Ligação ao Core/genética , Ciclina D1/biossíntese , Ciclina D1/genética , Cistadenocarcinoma Seroso/metabolismo , Cistadenocarcinoma Seroso/patologia , Metilação de DNA , Epigenômica/métodos , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , MicroRNAs/genética , Neoplasias Ovarianas/metabolismo , Neoplasias Ovarianas/patologia , PPAR gama/biossíntese , PPAR gama/genética , RNA Mensageiro/genética , Receptores Notch/biossíntese , Análise de Sobrevida
9.
Gynecol Oncol ; 124(2): 199-204, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22055763

RESUMO

OBJECTIVE: Compared with every-3-week paclitaxel (q3T) plus carboplatin, dose-dense weekly paclitaxel (ddT) plus carboplatin improved the survival of ovarian cancer patients. We performed a cost analysis comparing these two regimens. METHODS: Using a Markov decision model, an acceptable incremental cost-effectiveness ratio (ICER) per progression-free life-year saved (PFLYS) was estimated. Cost of drugs, growth colony-stimulating factors, and transfusions were derived from Medicare reimbursement data. Survival and rates of complications were estimated based on the clinical trial. RESULTS: Using a body weight and surface area of an average woman age 63, the estimated cost per cycle of ddT was $107 vs. $80 for q3T. The costs per cycle of combination chemotherapy including treatment administration were $873 for ddT and $535 for q3T. With a median progression-free survival (PFS) of 28 months with ddT vs. 17.2 months with q3T, the ICER was $5809 per PFLYS for ddT compared with q3T arm. Using a maximum ICER of $100,000 per LYS as cost-effective threshold, the ddT regimen was cost-effective. The ICER was most sensitive to the hazard rate for difference in PFS between the two regimens. A 4-month difference in PFS resulted in a $1200 change of ICER per PFLYS. The ICER was also sensitive to overall survival difference, rate of hematological toxicity, and rate of discontinuation. CONCLUSIONS: In this economic model, dose-dense weekly paclitaxel is a cost-effective treatment option for advanced ovarian cancer.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/economia , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/economia , Carboplatina/administração & dosagem , Carboplatina/efeitos adversos , Análise Custo-Benefício , Intervalo Livre de Doença , Esquema de Medicação , Custos de Medicamentos , Feminino , Humanos , Cadeias de Markov , Pessoa de Meia-Idade , Modelos Econômicos , Paclitaxel/administração & dosagem , Paclitaxel/efeitos adversos , Modelos de Riscos Proporcionais
10.
Mil Med ; 2022 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-35762133

RESUMO

INTRODUCTION: During the 2020-2021 academic year, the Family Medicine (FM) faculty at David Grant USAF Medical Center (DGMC) incorporated Clinic First principles into the resident educational experience. The faculty hypothesized that these changes could improve symptoms of resident burnout. MATERIALS AND METHODS: The study was conducted at a single United States Air Force (USAF) FM residency program in California and was approved by the DGMC Institutional Review Board. The validated Maslach Burnout Inventory Human Services Survey for Medical Personnel was used to assess (1) emotional exhaustion, (2) depersonalization, and (3) personal achievement both prior to and following implementation of the Clinic First-inspired curriculum. Descriptive and inferential statistics were used to summarize the data. RESULTS: There were 25 eligible FM residents who participated in the study. At baseline, the mean scores on the Maslach Burnout Inventory Human Services Survey for Medical Personnel indicated moderate burnout across all 3 domains. There was a statistically significant difference (P = .03) in the mean EE score over time, demonstrating worsening exhaustion. There was no statistically significant difference (P = .37 and P = .08, respectively) in the mean DP or PA score over time. CONCLUSIONS: Residents in the DGMC FM residency program were experiencing moderate burnout at the beginning of the 2020-2021 AY. Due to unforeseen challenges, the Clinic First initiative was not realized in its full potential, and the curriculum changes did not definitively protect against burnout. Further study is indicated.

11.
Gynecol Oncol ; 121(1): 83-6, 2011 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21208650

RESUMO

OBJECTIVES: To investigate access to surgical care for endometrial cancer in Arizona. METHODS: The Arizona HealthQuery (AZHQ) data warehouse with claims information on over 7 million patients in Arizona was searched using the International Classification of Disease (ICD-9) codes and Current Procedural Terminology (CPT) codes for endometrial cancer surgery from 2005 to 2008. Coordinates were gathered for patients and hospital to determine the distance traveled, race, insurance and annual caseload per hospital/surgeon were collected. Distance traveled was local (< 50 miles) or distant (≥ 50 miles) and served as the primary independent variable. Secondary variables included age, race, insurance, surgeon annual volume, and hospital annual volume. Logistic regression for distance traveled was performed for insurance coverage, race, hospital volume, and surgeon volume and expressed as an odds ratio. RESULTS: There were 1532 endometrial cancer surgeries performed at 67 hospitals by 242 surgeons in 15 counties. Most (61%) were performed by high-volume surgeons. Approximately 1 in 5 (19%) of patients traveled greater than 50 miles. Medicare insured patients were twice (OR=2.07, 95% CI=1.38-3.13) and Medicaid patients were three times (OR=3.41, 95% CI=1.89-6.15) as likely to travel over 50 miles. No significant difference was found between uninsured and privately insured patients (OR=0.87, 95% CI=0.45-1.68). Patients were more likely to travel to a high volume facility (OR 2.39, 95% CI=1.26-4.51). Hispanics (OR=2.72, 95% CI=1.72-4.32) and Native Americans (OR=8.60, 95% CI=3.43-21.52) were more likely to travel compared to Caucasians. CONCLUSION: In Arizona significantly different patterns of care are seen for endometrial cancer surgery based upon insurance coverage, race, surgeon and hospital. Patients travel farther to a high-volume hospital and high-volume surgeon. Hispanics or Native Americans travel farther for care when compared with Caucasians. Patients on government funded insurance plans travel farther for care than patients covered by private insurance or those lacking insurance.


Assuntos
Neoplasias do Endométrio/cirurgia , Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Adolescente , Adulto , Idoso , Arizona/epidemiologia , Estudos Transversais , Bases de Dados Factuais , Neoplasias do Endométrio/epidemiologia , Neoplasias do Endométrio/etnologia , Feminino , Procedimentos Cirúrgicos em Ginecologia/estatística & dados numéricos , Ginecologia , Humanos , Oncologia , Pessoa de Meia-Idade , Recursos Humanos , Adulto Jovem
12.
Am J Health Syst Pharm ; 78(6): 498-510, 2021 03 05.
Artigo em Inglês | MEDLINE | ID: mdl-33539506

RESUMO

PURPOSE: The high-value pharmacy enterprise (HVPE) framework and constituent best practice consensus statements are presented, and the methods used to develop the framework's 8 domains are described. SUMMARY: A panel of pharmacy leaders used an evidence- and expert opinion-based approach to define core and aspirational elements of practice that should be established within contemporary health-system pharmacy enterprises by calendar year 2025. Eight domains of an HVPE were identified: Patient Care Services; Business Services; Ambulatory and Specialty Pharmacy Services; Inpatient Operations; Safety and Quality; Pharmacy Workforce; Information Technology, Data, and Information Management; and Leadership. Phase 1 of the project consisted of the development of draft practice statements, performance elements, and supporting evidence for each domain by panelists, followed by a phase 2 in-person meeting for review and development of consensus for statements and performance elements in each domain. During phase 3, the project cochairs and panelists finalized the domain drafts and incorporated them into a full technical report and this summary report. CONCLUSION: The HVPE framework is a strategic roadmap to advance pharmacy practice by ensuring safe, effective, and patient-centered medication management and business practices throughout the health-system pharmacy enterprise. Grounded in evidence and expert recommendations, the statements and associated performance elements can be used to identify strategic priorities to improve patient outcomes and add value within health systems.


Assuntos
Serviço de Farmácia Hospitalar , Farmácia , Consenso , Humanos , Farmacêuticos , Relatório de Pesquisa
16.
Mol Cancer Ther ; 17(2): 464-473, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29237804

RESUMO

Although progesterone receptor (PR)-targeted therapies are modestly active in patients with uterine cancer, their underlying molecular mechanisms are not well understood. The clinical use of such therapies is limited because of the lack of biomarkers that predict response to PR agonists (progestins) or PR antagonists (onapristone). Thus, understanding the underlying molecular mechanisms of action will provide an advance in developing novel combination therapies for cancer patients. Nuclear translocation of PR has been reported to be ligand-dependent or -independent. Here, we identified that onapristone, a PR antagonist, inhibited nuclear translocation of ligand-dependent or -independent (EGF) phospho-PR (S294), whereas trametinib inhibited nuclear translocation of EGF-induced phospho-PR (S294). Using orthotopic mouse models of uterine cancer, we demonstrated that the combination of onapristone and trametinib results in superior antitumor effects in uterine cancer models compared with either monotherapy. These synergistic effects are, in part, mediated through inhibiting the nuclear translocation of EGF-induced PR phosphorylation in uterine cancer cells. Targeting MAPK-dependent PR activation with onapristone and trametinib significantly inhibited tumor growth in preclinical uterine cancer models and is worthy of further clinical investigation. Mol Cancer Ther; 17(2); 464-73. ©2017 AACR.


Assuntos
Antineoplásicos/uso terapêutico , Gonanos/uso terapêutico , Receptores de Progesterona/antagonistas & inibidores , Neoplasias Uterinas/tratamento farmacológico , Animais , Antineoplásicos/farmacologia , Linhagem Celular Tumoral , Feminino , Gonanos/farmacologia , Humanos , Camundongos , Camundongos Nus , Neoplasias Uterinas/genética , Neoplasias Uterinas/patologia
17.
Cancer Res ; 78(12): 3233-3242, 2018 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-29661830

RESUMO

Mounting clinical and preclinical evidence supports a key role for sustained adrenergic signaling in the tumor microenvironment as a driver of tumor growth and progression. However, the mechanisms by which adrenergic neurotransmitters are delivered to the tumor microenvironment are not well understood. Here we present evidence for a feed-forward loop whereby adrenergic signaling leads to increased tumoral innervation. In response to catecholamines, tumor cells produced brain-derived neurotrophic factor (BDNF) in an ADRB3/cAMP/Epac/JNK-dependent manner. Elevated BDNF levels in the tumor microenvironment increased innervation by signaling through host neurotrophic receptor tyrosine kinase 2 receptors. In patients with cancer, high tumor nerve counts were significantly associated with increased BDNF and norepinephrine levels and decreased overall survival. Collectively, these data describe a novel pathway for tumor innervation, with resultant biological and clinical implications.Significance: Sustained adrenergic signaling promotes tumor growth and metastasis through BDNF-mediated tumoral innervation. Cancer Res; 78(12); 3233-42. ©2018 AACR.


Assuntos
Fator Neurotrófico Derivado do Encéfalo/metabolismo , Retroalimentação Fisiológica , Neoplasias/patologia , Norepinefrina/metabolismo , Receptores Adrenérgicos beta 3/metabolismo , Animais , Linhagem Celular Tumoral , AMP Cíclico/metabolismo , Feminino , Fatores de Troca do Nucleotídeo Guanina/metabolismo , Humanos , Glicoproteínas de Membrana/metabolismo , Camundongos , Neoplasias/mortalidade , Nervos Periféricos/metabolismo , Nervos Periféricos/patologia , Receptor trkB/metabolismo , Transdução de Sinais , Microambiente Tumoral/fisiologia , Ensaios Antitumorais Modelo de Xenoenxerto
18.
Clin Cancer Res ; 23(22): 7034-7046, 2017 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-28855350

RESUMO

Purpose: VEGF-targeted therapies have modest efficacy in cancer patients, but acquired resistance is common. The mechanisms underlying such resistance are poorly understood.Experimental Design: To evaluate the potential role of immune cells in the development of resistance to VEGF blockade, we first established a preclinical model of adaptive resistance to anti-VEGF therapy. Additional in vitro and in vivo studies were carried out to characterize the role of macrophages in such resistance.Results: Using murine cancer models of adaptive resistance to anti-VEGF antibody (AVA), we found a previously unrecognized role of macrophages in such resistance. Macrophages were actively recruited to the tumor microenvironment and were responsible for the emergence of AVA resistance. Depletion of macrophages following emergence of resistance halted tumor growth and prolonged survival of tumor-bearing mice. In a macrophage-deficient mouse model, resistance to AVA failed to develop, but could be induced by injection of macrophages. Downregulation of macrophage VEGFR-1 and VEGFR-3 expression accompanied upregulation of alternative angiogenic pathways, facilitating escape from anti-VEGF therapy.Conclusions: These findings provide a new understanding of the mechanisms underlying the modest efficacy of current antiangiogenesis therapies and identify new opportunities for combination approaches for ovarian and other cancers. Clin Cancer Res; 23(22); 7034-46. ©2017 AACR.


Assuntos
Antineoplásicos/farmacologia , Resistencia a Medicamentos Antineoplásicos , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Macrófagos/metabolismo , Receptores de Fatores de Crescimento do Endotélio Vascular/antagonistas & inibidores , Receptores de Fatores de Crescimento do Endotélio Vascular/genética , Animais , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/genética , Modelos Animais de Doenças , Feminino , Humanos , Macrófagos/imunologia , Camundongos , Neoplasias/tratamento farmacológico , Neoplasias/genética , Neoplasias/metabolismo , Neoplasias/patologia , Neovascularização Patológica/tratamento farmacológico , Regiões Promotoras Genéticas , Microambiente Tumoral/efeitos dos fármacos , Microambiente Tumoral/imunologia , Ensaios Antitumorais Modelo de Xenoenxerto
19.
J Natl Cancer Inst ; 109(7)2017 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-28376174

RESUMO

Background: The PI3K/AKT/P70S6K pathway is an attractive therapeutic target in ovarian and uterine malignancies because of its high rate of deregulation and key roles in tumor growth. Here, we examined the biological effects of MSC2363318A, which is a novel inhibitor of AKT1, AKT3, and P70S6K. Methods: Orthotopic murine models of ovarian and uterine cancer were utilized to study the effect of MSC2363318A on survival and regression. For each cell line, 10 mice were treated in each of the experimental arms tested. Moreover, in vitro experiments in 21 cell lines (MTT, immunoblot analysis, plasmid transfection, reverse phase protein array [RPPA]) were carried out to characterize underlying mechanisms and potential biomarkers of response. All statistical tests were two-sided. Results: MSC2363318A decreased tumor growth and metastases in multiple murine orthotopic models of ovarian (SKOV3ip1, HeyA8, and Igrov1) and uterine (Hec1a) cancer by reducing proliferation and angiogenesis and increasing cell death. Statistically significant prolonged overall survival was achieved with combination MSC2363318A and paclitaxel in the SKUT2 (endometrioid) uterine cancer mouse model ( P < .001). Mice treated with combination MSC2363318A and paclitaxel had the longest overall survival (mean = 104.2 days, 95% confidence interval [CI] = 97.0 to 111.4) compared with those treated with vehicle (mean = 61.9 days, 95% CI = 46.3 to 77.5), MSC2363318A alone (mean = 89.7 days, 95% CI = 83.0 to 96.4), and paclitaxel alone (mean = 73.6 days, 95% CI = 53.4 to 93.8). Regression and stabilization of established tumors in the Ishikawa (endometrioid) uterine cancer model was observed in mice treated with combination MSC2363318A and paclitaxel. Synergy between MSC2363318A and paclitaxel was observed in vitro in cell lines that had an IC50 of 5 µM or greater. RPPA results identified YAP1 as a candidate marker to predict cell lines that were most sensitive to MSC2363318A (R = 0.54, P = .02). After establishment of a murine ovarian cancer model of adaptive anti-angiogenic resistance (SKOV3ip1-luciferase), we demonstrate that resensitization to bevacizumab occurs with the addition of MSC2363318A, resulting in improved overall survival ( P = .01) using the Kaplan-Meier method. Mice treated with bevacizumab induction followed by MSC2363318A had the longest overall survival (mean = 66.0 days, 95% CI = 53.9 to 78.1) compared with mice treated with control (mean = 42.0 days, 95% CI = 31.4 to 52.6) and bevacizumab-sensitive mice (mean = 47.2 days; 95% CI = 37.5 to 56.9). Conclusions: MSC2363318A has therapeutic efficacy in multiple preclinical models of ovarian and uterine cancer. These findings support clinical development of a dual AKT/P70S6K inhibitor.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Biomarcadores Tumorais/metabolismo , Neoplasias Ovarianas/metabolismo , Fosfoproteínas/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteínas Quinases S6 Ribossômicas 70-kDa/metabolismo , Neoplasias Uterinas/metabolismo , Inibidores da Angiogênese/administração & dosagem , Inibidores da Angiogênese/farmacologia , Animais , Antineoplásicos Fitogênicos/administração & dosagem , Antineoplásicos Fitogênicos/farmacologia , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Apoptose/efeitos dos fármacos , Bevacizumab/administração & dosagem , Bevacizumab/farmacologia , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Feminino , Humanos , Concentração Inibidora 50 , Estimativa de Kaplan-Meier , Camundongos Nus , Neoplasias Ovarianas/tratamento farmacológico , Paclitaxel/administração & dosagem , Paclitaxel/farmacologia , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/farmacologia , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Proteínas Quinases S6 Ribossômicas 70-kDa/antagonistas & inibidores , Fatores de Transcrição , Carga Tumoral/efeitos dos fármacos , Neoplasias Uterinas/tratamento farmacológico , Ensaios Antitumorais Modelo de Xenoenxerto , Proteínas de Sinalização YAP
20.
Mol Cancer Ther ; 15(6): 1344-52, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-27009216

RESUMO

Delta-like ligand 4 (Dll4), one of the Notch ligands, is overexpressed in ovarian cancer, especially in tumors resistant to anti-VEGF therapy. Here, we examined the biologic effects of dual anti-Dll4 and anti-VEGF therapy in ovarian cancer models. Using Dll4-Fc blockade and anti-Dll4 antibodies (murine REGN1035 and human REGN421), we evaluated the biologic effects of Dll4 inhibition combined with aflibercept or chemotherapy in orthotopic mouse models of ovarian cancer. We also examined potential mechanisms by which dual Dll4 and VEGF targeting inhibit tumor growth using immunohistochemical staining for apoptosis and proliferation markers. Reverse-phase protein arrays were used to identify potential downstream targets of Dll4 blockade. Dual targeting of VEGF and Dll4 with murine REGN1035 showed superior antitumor effects in ovarian cancer models compared with either monotherapy. In the A2780 model, REGN1035 (targets murine Dll4) or REGN421 (targets human Dll4) reduced tumor weights by 62% and 82%, respectively; aflibercept alone reduced tumor weights by 90%. Greater therapeutic effects were observed for Dll4 blockade (REGN1035) combined with either aflibercept or docetaxel (P < 0.05 for the combination vs. aflibercept). The superior antitumor effects of REGN1035 and aflibercept were related to increased apoptosis in tumor cells compared with the monotherapy. We also found that GATA3 expression was significantly increased in tumor stroma from the mice treated with REGN1035 combined with docetaxel or aflibercept, suggesting an indirect effect of these combination treatments on the tumor stroma. These findings identify that dual targeting of Dll4 and VEGF is an attractive therapeutic approach. Mol Cancer Ther; 15(6); 1344-52. ©2016 AACR.


Assuntos
Anticorpos Monoclonais/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Proteínas de Membrana/metabolismo , Neoplasias Ovarianas/tratamento farmacológico , Receptores de Fatores de Crescimento do Endotélio Vascular/administração & dosagem , Proteínas Recombinantes de Fusão/administração & dosagem , Animais , Anticorpos Monoclonais/farmacologia , Anticorpos Monoclonais Humanizados , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Fator de Transcrição GATA3/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Camundongos , Transplante de Neoplasias , Neoplasias Ovarianas/metabolismo , Proteínas Recombinantes de Fusão/farmacologia , Regulação para Cima/efeitos dos fármacos , Ensaios Antitumorais Modelo de Xenoenxerto
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