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https://www.readbyqxmd.com/read/29156731/mir-21-modulates-the-effect-of-ezh2-on-the-biological-behavior-of-human-lung-cancer-stem-cells-in-vitro
#1
Hui Xia, Wen Zhang, Baoshi Zhang, Yingnan Zhao, Yunlong Zhao, Shaojun Li, Yang Liu
Non-small-cell lung cancer has a high mortality rate and poor prognosis. Therefore, novel therapeutic approaches are urgently needed to enhance patient survival rates. In this study, we investigated the effects of miR-21 and EZH2 on the biological behavior of human lung cancer stem cells in vitro. We found increased expression of EZH2 and miR-21 in LCSCs, and miR-21 overexpression increased EZH2 levels in LCSCs. In addition, EZH2 and miR-21 knockdown increased the sensitivity of LCSCs to chemo- and radiation therapy, and exogenous EZH2 expression rescued the effects of anti-miR-21...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156644/akt1-stimulates-homologous-recombination-repair-of-dna-double-strand-breaks-in-a-rad51-dependent-manner
#2
Katharina Mueck, Simone Rebholz, Mozhgan Dehghan Harati, H Peter Rodemann, Mahmoud Toulany
Akt1 is known to promote non-homologous end-joining (NHEJ)-mediated DNA double-strand break (DSB) repair by stimulation of DNA-PKcs. In the present study, we investigated the effect of Akt1 on homologous recombination (HR)-dependent repair of radiation-induced DSBs in non-small cell lung cancer (NSCLC) cells A549 and H460. Akt1-knockdown (Akt1-KD) significantly reduced Rad51 protein level, Rad51 foci formation and its colocalization with γH2AX foci after irradiation. Moreover, Akt1-KD decreased clonogenicity after treatment with Mitomycin C and HR repair, as tested by an HR-reporter assay...
November 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29154894/non-contrast-quantitative-pulmonary-perfusion-using-flow-alternating-inversion-recovery-at-3t-a-preliminary-study
#3
Joshua S Greer, Christopher D Maroules, Orhan K Oz, Suhny Abbara, Ronald M Peshock, Ivan Pedrosa, Ananth J Madhuranthakam
PURPOSE: To demonstrate the initial feasibility of non-contrast quantitative pulmonary perfusion imaging at 3T using flow alternating inversion recovery (FAIR), and to evaluate the intra-session and inter-session reliability of FAIR measurements at 3T. MATERIALS AND METHODS: Nine healthy volunteers were imaged using our own implementation of FAIR pulse sequence on 3T. Quantitative FAIR perfusion, both with and without larger pulmonary vessels, was correlated with global phase contrast (PC) measured blood flow in the right pulmonary artery (RPA)...
November 14, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29153897/comparison-of-single-and-three-fraction-schedules-of-stereotactic-body-radiation-therapy-for-peripheral-early-stage-non-small-cell-lung-cancer
#4
Sung Jun Ma, Lucas M Serra, Yusef A Syed, Gregory M Hermann, Jorge A Gomez-Suescun, Anurag K Singh
BACKGROUND: To compare the clinical outcomes of patients with early-stage non-small-cell lung cancer (NSCLC) who had undergone either single-fraction (SF) or three-fraction (TF) stereotactic body radiation therapy (SBRT) at a single institution during over 8-year period. PATIENTS AND METHODS: Patients with peripherally located early-stage NSCLC who had undergone SBRT from February 2007 to November 2015 were included in the present study. SBRT was delivered without heterogeneity correction...
October 28, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/29152838/commissioning-of-the-world-s-first-compact-pencil-beam-scanning-proton-therapy-system
#5
Rajesh Pidikiti, Bijal C Patel, Matthew R Maynard, Joseph P Dugas, Joseph Syh, Narayan Sahoo, Hsinshun Terry Wu, Lane R Rosen
This paper summarizes clinical commissioning of the world's first commercial, clinically utilized installation of a compact, image-guided, pencil-beam scanning, intensity-modulated proton therapy system, the IBA Proteus(®) ONE, at the Willis-Knighton Cancer Center (WKCC) in Shreveport, LA. The Proteus(®) ONE is a single-room, compact-gantry system employing a cyclotron-generated proton beam with image guidance via cone-beam CT as well as stereoscopic orthogonal and oblique planar kV imaging. Coupling 220° of gantry rotation with a 6D robotic couch capable of in plane patient rotations of over 180° degrees allows for 360° of treatment access...
November 20, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29151967/new-clinical-features-and-dosimetric-predictor-identification-for-symptomatic-radiation-pneumonitis-after-tangential-irradiation-in-breast-cancer-patients
#6
Ge Wen, Yu-Ting Tan, Xiao-Wen Lan, Zhi-Chun He, Jiang-Hua Huang, Jun-Tian Shi, Xiao Lin, Xiao-Bo Huang
Background: Tangential irradiation is the most popular postoperative radiotherapy technique for breast cancer. However, irradiation has been related to symptomatic radiation pneumonitis (SRP), which decreases the quality of life of patients. This study investigated the clinical features and dosimetric parameters related to SRP of the ipsilateral lung to identify risk factors for SRP in breast cancer patients after three-dimensional conformal radiation therapy (3D-CRT) with tangential fields. Material and Methods: A total of 515 breast cancer patients were evaluated and divided into two groups: the local-regional irradiation group (259 patients) and the simple local irradiation group (256 patients)...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/29151289/-prognostic-value-of-18-f-fluorodeoxyglucose-fdg-positron-emission-tomography-computed-tomography-pet-ct-in-extensive-stage-small-cell-lung-cancer
#7
C Y Ding, Z Guo, Y Y Li, T R Li
Objective: To investigated the prognostic value of (18)F-fluorodeoxyglucose (FDG) positron emission tomography-computed tomography (PET-CT) in extensive-stage small cell lung cancer (ES -SCLC). Methods: Fifty-five patients with ES-SCLC who underwent pretreatment (18)F-FDG PET-CT were retrospectively recruited in this study. The correlations of maximum standardized uptake value (SUVmax) of primary lesion, metabolic tumor volume (MTV) of primary lesion (MTVp), total lesion glycolysis (TLG) of primary lesion (TLGp), the highest SUVmax of all lesions, the sum of metabolic volume (MTV sum), the sum of total lesions glycolysis (TLGsum) and clinical factors were analyzed...
November 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/29150967/drug-delivery-strategies-for-chemoprevention-of-uvb%C3%A2-induced-skin-cancer-a-review
#8
REVIEW
Arvind Bagde, Arindam Mondal, Mandip Singh
Annually, more skin cancer cases are diagnosed than the collective incidence of the colon, lung, breast and prostate cancer. Persistent contact with sunlight is a primary cause for all the skin malignancies. UVB radiation induces reactive oxygen species (ROS) production in the skin which eventually leads to DNA damage and mutation. Various delivery approaches for the skin cancer treatment/prevention have been evolving and are directed towards improvements in terms of delivery modes, therapeutic agents and site-specificity of therapeutics delivery...
November 18, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/29150161/improved-pharmacodynamic-pd-assessment-of-low-dose-parp-inhibitor-pd-activity-for-radiotherapy-and-chemotherapy-combination-trials
#9
Rosemarie de Haan, Dick Pluim, Baukelien van Triest, Michel van den Heuvel, Heike Peulen, Damien van Berlo, Jay George, Marcel Verheij, Jan H M Schellens, Conchita Vens
BACKGROUND: PARP inhibitors are currently evaluated in combination with radiotherapy and/or chemotherapy. As sensitizers, PARP inhibitors are active at very low concentrations therefore requiring highly sensitive pharmacodynamic (PD) assays. Current clinical PD-assays partly fail to provide such sensitivities. The aim of our study was to enable sensitive PD evaluation of PARP inhibitors for clinical sensitizer development. MATERIAL AND METHODS: PBMCs of healthy individuals and of olaparib and radiotherapy treated lung cancer patients were collected for ELISA-based PD-assays...
November 14, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29150043/synchronous-esophageal-and-lung-cancer
#10
REVIEW
Amar N Mukerji, Andrea Wolf
Synchronous lung and esophageal cancers are rare but represent a unique challenge to thoracic surgeons. The literature is limited but series describe long-term survival with curative surgery for concomitant esophageal and lung cancer. Preoperative risk assessment is critical because surgical resection of both cancers requires adequate cardiopulmonary function and performance status. Chemotherapy and radiation are used as adjuvant therapy or as primary treatment of unresectable lesions. Although long-term survival for patients with concomitant lung and esophageal cancer is lower than that of patients with either one alone, survival with curative surgery is higher than that of patients with metastatic disease of either primary...
February 2018: Thoracic Surgery Clinics
https://www.readbyqxmd.com/read/29148432/a-singular-value-decomposition-linear-programming-svdlp-optimization-technique-for-circular-cone-based-robotic-radiotherapy
#11
Bin Liang, Yongbao Li, Wei Ran, Bin Guo, Xuang Xu, Bo Liu, Jiafeng Li, Qiuwen Wu, Fugen Zhou
With robot-controlled linac positioning, the robotic radiotherapy system such as CyberKnife significantly increases the freedom in radiation beam placement, but also imposes more challenges on treatment plan optimization. The resampling mechanism in vendor supplied treatment planning system (MultiPlan) could not fully explore the increased beam direction search space. Besides, a sparse treatment plan (using fewer beams) is desired to improve the treatment efficiency. This study proposes a singular value decomposition linear programming (SVDLP) optimization technique for circular collimator based robotic radiotherapy...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29147454/late-onset-chemo-radiation-induced-tracheoesophageal-fistula-in-squamous-cell-cancer-of-the-lung
#12
Ashraf Abugroun, Fatima Ahmed, Namrata Singh, Mojtaba Nadiri
We report a 72-year-old male with past medical history of stage IV squamous lung cancer treated with radiation therapy and chemotherapy with gemcitabine/carboplatin. One year later, he presented with hemoptysis treated with another session of palliative radiotherapy. Two weeks later, patient developed aspiration pneumonia and further workup showed trachea-esophageal fistula documented by barium swallow. This case shows a rare complication of chemotherapy and radiation therapy on the setting of primary lung cancer...
October 2017: World Journal of Oncology
https://www.readbyqxmd.com/read/29147071/exhaled-nitric-oxide-is-useful-in-symptomatic-radioactive-pneumonia-a-retrospective-study
#13
Jiancheng Li, Xiaobin Fu, Jie Fu
The aim was to defect the exhaled nitric oxide (eNO) prediction value of symptomatic radioactive pneumonia (SRP). 64 cases of lung cancer or esophagus cancer, who had the primary radiotherapy (intensity-modulated radiation therapy), were included from 2015 June to 2016 January. During the following, the patients were divided: the symptomatic radiation pneumonia group (SRP, with the CTCAE v4.0 score > 2) and the asymptomatic radiation pneumonia group (ASRP, with CTCAE v4.0 score ≤ 1). All the patients were measured eNO before and at the end of thoracic radiotherapy and gain the posttherapy eNO value and the eNO ratio (posttherapy eNO value/pretherapy eNO value), then the predictive values of eNO toward SRP were measured using the receiver-operating characteristic (ROC)...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29145332/primary-malignant-melanoma-of-the-lung-a-case-report-and-literature-review
#14
Juan Peng, Fengfeng Han, Tianyun Yang, Jinyuan Sun, Wenbin Guan, Xuejun Guo
RATIONALE: Primary malignant melanoma of the lung (PMML) is an extremely rare neoplasm with a dismal prognosis. The diagnosis of PMML is very difficult and is based on several clinical, radiological, and histopathological criteria. PATIENT CONCERNS: A 61-year-old women was admitted with a 2-month history of a productive cough and chest pain provoked by breathing and coughing. Computed tomography (CT) scans of the chest showed a large, solid tumor in the right middle lobe of the lung...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144490/neonatal-lung-ultrasound-exam-guidelines
#15
D Kurepa, N Zaghloul, L Watkins, J Liu
Point-of-care ultrasound (POC-US) is increasingly used especially in emergency and critical-care medicine. It is focused, quick and does not expose patients to ionizing radiation. It encompasses all organ systems and has well-defined indications. Lung ultrasound (LUS) represents one of the most exciting applications in the field of POC-US. It is particularly important to emphasize the role of LUS in neonatology due to the specific pathology inherent in lung immaturity as well as in the particular sensitivity of neonates to repeated radiation exposure...
November 16, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29143200/structural-and-perfusion-magnetic-resonance-imaging-of-the-lung-in-cystic-fibrosis
#16
Christina Amaxopoulou, Ralph Gnannt, Kai Higashigaito, Andreas Jung, Christian J Kellenberger
BACKGROUND: Because of its absence of ionising radiation and possibility for obtaining functional information, MRI is promising for assessing lung disease in children who require repetitive imaging for long-term follow-up. OBJECTIVE: To describe MRI findings in children with cystic fibrosis and evaluate semi-quantitative dynamic contrast-enhanced lung perfusion. MATERIALS AND METHODS: We retrospectively compared lung MRI in 25 children and young adults with cystic fibrosis (median age 3...
November 15, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29142626/resection-and-observation-for-brain-metastasis-without-prompt-postoperative-radiation-therapy
#17
Tae-Wook Song, In-Young Kim, Shin Jung, Tae-Young Jung, Kyung-Sub Moon, Woo-Youl Jang
Objective: Total resection without consecutive postoperative whole brain radiation therapy is indicated for patients with a single or two sites of brain metastasis, with close follow-up by serial magnetic resonance imaging (MRI). In this study, we explored the effectiveness, usefulness, and safety of this follow-up regimen. Methods: From January 2006 to December 2015, a total of 109 patients (76 males, 33 females) underwent tumor resection as the first treatment for brain metastases (97 patients with single metastases, 12 with two metastases)...
November 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29141779/five-field-imrt-class-solutions-and-dosimetric-planning-guidelines-for-implementing-accelerated-partial-breast-irradiation
#18
Sarah Quirk, Petra Grendarova, Michael Roumeliotis
PURPOSE: A comprehensive set of planning guidelines was developed to aid in achieving reproducible dosimetric results for external beam accelerated partial breast irradiation (APBI). The methodology for the development of class solutions for dosimetric planning of the APBI technique, including dose constraint recommendations, is presented for target coverage and conformity as well as normal tissues. METHODS AND MATERIALS: A conservative patient setup was simulated on a linear accelerator, and a comprehensive arrangement of gantry and couch angles was measured for clearance...
September 28, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29137037/a-case-report-of-recurrent-thyroid-inflammatory-myofibroblastic-tumor-and-its-metastasis-in-soft-tissue
#19
Jiajia Duan, Ying Wang
RATIONALE: Inflammatory myofibroblastic tumor (IMT) is a neoplasm of low malignant potential. The most frequent site of IMT is in the lung, whereas recurrent and metastasis of thyroid IMT has been seldom reported. PATIENT CONCERNS: A 57-year-old male presented with a 3-year history of painless thyroid mass. The physical examination revealed a diffusely enlarged thyroid which was firm. The thyroid function and antibodies were normal. Thyroid ultrasound revealed a hypoechoic mass in the left lobe and heterogeneous echo in the right lobe...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29136066/unsuspected-lymphomatoid-granulomatosis-in-a-patient-with-antisynthetase-syndrome
#20
Stephanie L Skala, Alexandra C Hristov, Johann E Gudjonsson, May P Chan
Clinical diagnosis of lymphomatoid granulomatosis (LYG) often is difficult, especially in patients with multiple comorbidities. We present a 60-year-old woman with worsening fatigue, night sweats, unintentional weight loss, and dyspnea of 2 weeks' duration. Her medical history was remarkable for recent radiation therapy for recurrent breast cancer and antisynthetase syndrome complicated by interstitial lung disease and controlled with azathioprine. Computed tomography showed ground-glass opacities and nodular infiltrates in all lung lobes, raising concern for radiation pneumonitis and drug toxicity...
October 2017: Cutis; Cutaneous Medicine for the Practitioner
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