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Radiation and salivary gland

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https://www.readbyqxmd.com/read/29340084/crispr-cas9-hdr-system-enhances-aqp1-gene-expression
#1
Zhimin Wang, Yaohe Wang, Songling Wang, Li-Rong Zhang, Na Zhang, Zhenguo Cheng, Qingshi Liu, Kelly J Shields, Baoli Hu, Michael J Passineau
Ionizing radiation (IR) isthe primarytherapeutic tool to treat patients with cancerous lesions located in the head and neck. In many patients, IR results in irreversible and severe salivary gland dysfunction or xerostomia. Currently there are no effective treatment options to reduce the effects of xerostomia. More recently, salivary gland gene therapy utilizing the water-specific protein aquaporin 1 (AQP1) has been of great interest to potentially correct salivary dysfunction. In this study, we used CRISPR-Cas9 gene editing along with the endogenous promoter of AQP1 within theHEK293 and MDCK cell lines...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29335337/salivary-glands-regenerate-after-radiation-injury-through-sox2-mediated-secretory-cell-replacement
#2
Elaine Emmerson, Alison J May, Lionel Berthoin, Noel Cruz-Pacheco, Sara Nathan, Aaron J Mattingly, Jolie L Chang, William R Ryan, Aaron D Tward, Sarah M Knox
Salivary gland acinar cells are routinely destroyed during radiation treatment for head and neck cancer that results in a lifetime of hyposalivation and co-morbidities. A potential regenerative strategy for replacing injured tissue is the reactivation of endogenous stem cells by targeted therapeutics. However, the identity of these cells, whether they are capable of regenerating the tissue, and the mechanisms by which they are regulated are unknown. Using in vivo and ex vivo models, in combination with genetic lineage tracing and human tissue, we discover a SOX2+ stem cell population essential to acinar cell maintenance that is capable of replenishing acini after radiation...
January 15, 2018: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29281871/fine-needle-aspiration-cytology-of-carcinosarcoma-in-the-salivary-gland-an-extremely-rare-case-report
#3
Hyo Jung An, Hye Jin Baek, Jin Pyeong Kim, Kim Min Hye, Dae Hyun Song
Carcinosarcoma of the salivary gland is an extremely rare tumor that is composed of both malignant epithelial and mesenchymal components. Diagnosing carcinosarcoma with fine needle aspiration cytology is challenging because of its overlapping cytomorphologic characteristics with other high-grade malignant salivary gland tumors. Among the many features, including pleomorphic oncocytoid epithelial components, necrotic background, and mitoses, recognizing the singly scattered atypical spindle cells is most essential in carcinosarcoma...
December 28, 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/29248424/hyperbaric-oxygen-treatment-did-not-significantly-affect-radiation-injury-in-the-mandibular-area-of-rats
#4
Tonje Sønstevold, Anne Christine Johannessen, Rolf K Reed, Gerd S Salvesen, Linda Stuhr
OBJECTIVE: Hyperbaric oxygen therapy (HBOT) has been used to enhance microcirculation and thereby oxygen tension in tissues. The present study aimed to investigate the effect of HBOT on radiation injury in the mandibular area of rats. STUDY DESIGN: The left mandibles of rats were irradiated by external radiotherapy (15 Gy every other week for a total of 75 Gy). Four HBOT strategies were used: 2 prophylactic groups receiving HBOT either between each radiation treatment or immediately following terminated radiation treatment, and 2 therapeutic groups receiving HBOT after the latent period of 6 weeks after irradiation either every day (standard HBOT protocol) or 3 days a week for 6 weeks...
November 2, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29232247/salivary-gland-activity-obscures-mandibular-metastasis-of-prostate-carcinoma-on-68ga-prostate-specific-membrane-antigen-pet
#5
Thabo Lengana, Ismaheel Lawal, Tebatso Boshomane, Kehinde Ololade, Florette Reyneke, Chimbabantiu Kaoma, Neo Mokgoro, Mariza Vorster, Mike Sathekge
We report a case of a 65-year-old man with prostate cancer; his treatment history included radical prostatectomy followed by radiation therapy and subsequent androgen deprivation therapy for more than 5 years. He currently presented with a history of rising prostate-specific antigen and complained of jaw aches. Ga-prostate-specific membrane antigen PET/CT study performed for suspected biochemical recurrence demonstrated vertebral lesions and lesion in his jaw. Subsequent biopsy of jaw lesion demonstrated prostate cancer metastases...
February 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29216393/monte-carlo-simulation-of-out-of-field-organ-doses-and-cancer-risk-in-tanzania-for-radiation-therapy-of-unilateral-retinoblastoma-using-a-60co-unit
#6
Suleiman Ameir Suleiman, Yaping Qi, Yifei Pi, X George Xu
The use of 60Co teletherapy unit for the treatment of unilateral retinoblastoma (Rb) patients is a very common procedure in many developing countries including Tanzania. The aim of this study was to estimate organ-specific absorbed doses from an external beam radiation therapy 60Co unit for unilateral Rb and to assess the risks of the patients developing a secondary primary cancer. The absorbed dose estimations were based on a Monte Carlo method and a set of age-dependent computational male phantoms. The estimated doses were used to calculate the secondary cancer risks in out-of-field organs using the Biological Effects of Ionising Radiation VII risk models...
December 5, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29194287/expression-of-adamts2-and-adamts5-in-the-salivary-gland-of-rats-after-radioiodine-therapy
#7
Murat Sadic, Koray Demirel, Sevil O Halacli, Emre Karakok, Gokhan Koca, Ozgur Ekinci, Kadir Demircan, Meliha Korkmaz
OBJECTIVE: The aim of this study was to investigate the presence of ADAMTS2 and ADAMTS5 in the salivary gland (SG) of rats after high-dose radioiodine therapy. METHODS: A total of 36 male Wistar albino rats were used for this study. Thirty-six male rats were divided randomly into six groups: control and five radioactive iodine (RAI) treatment groups of six rats each. All animals were killed. The evaluation of biodistribution and histopathological studies were carried out on the SGs removed...
November 29, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29187488/predictive-factors-and-a-survival-score-for-patients-irradiated-for-metastatic-spinal-cord-compression-from-carcinoma-of-the-salivary-glands
#8
Dirk Rades, Amira Bajrovic, Tobias Bartscht
AIM: To our knowledge, this is the first study focusing on metastatic spinal cord compression (MSCC) from carcinoma of the salivary glands. PATIENTS AND METHODS: Nine patients receiving radiation alone were evaluated for improvement of motor deficits, post-radiation gait function and survival. RESULTS: Of nine characteristics (radiation program, age, sex, additional metastases to bone or to other organs, dynamic of motor deficits, pre-radiation gait function, number of vertebrae affected by MSCC, general condition), strong trends were found for associations between improved motor deficits and their dynamic (p=0...
December 2017: Anticancer Research
https://www.readbyqxmd.com/read/29172327/head-and-neck-cancer-patients-%C3%A2-information-for-the-general-dental-practitioner
#9
Jennifer Noone, Craig Barclay
Salivary gland damage is the most common adverse effect associated with radiation therapy to the head and neck. A combination of hyposalivation and dietary changes, with a reduced emphasis on oral hygiene practices can contribute to a massive increase in a person’s caries risk status. This can be further complicated by limited mouth opening. To enable optimal dental care for head and neck cancer patients before, during and after radiation therapy, patients must be informed and educated about the potential risks of dental caries and the preventive strategies available...
March 2017: Dental Update
https://www.readbyqxmd.com/read/29163848/radiation-therapy-and-serum-salivary-amylase-in-head-and-neck-cancer
#10
REVIEW
Francesca De Felice, Mario Tombolini, Angela Musella, Francesco Marampon, Vincenzo Tombolini, Daniela Musio
Radiation therapy (RT) is a valid treatment option for head and neck cancer (HNC). The risk of RT-induced toxicities is significant, especially due to extended treatment fields. The raise in amylase activity is strictly dependent on the volume of salivary glands included in the irradiated target volume and it is firmly related to the dose. The aim of this review is to report the effects on salivary amylase activity after radiation exposure of salivary glands, in patients with HNC.
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29158832/clinical-translation-and-first-in-human-use-of-44sc-sc-psma-617-for-pet-imaging-of-metastasized-castrate-resistant-prostate-cancer
#11
Elisabeth Eppard, Ana de la Fuente, Martina Benešová, Ambreen Khawar, Ralph A Bundschuh, Florian C Gärtner, Barbara Kreppel, Klaus Kopka, Markus Essler, Frank Rösch
BACKGROUND: Various trivalent radiometals are well suited for labeling of DOTA-conjugated variants of Glu-ureido-based prostate-specific membrane antigen (PSMA) inhibitors. The DOTA-conjugate PSMA-617 has proven high potential in PSMA radioligand therapy (PSMA-RLT) of prostate cancer as well as PET imaging when labeled with lutetium-177 and gallium-68 respectively. Considering the relatively short physical half-life of gallium-68 this positron emitter precludes prolonged acquisition periods, as required for pre-therapeutic dosimetry or intraoperative applications...
2017: Theranostics
https://www.readbyqxmd.com/read/29147434/acute-radiation-induced-changes-in-sprague-dawley-rat-submandibular-glands-a-histomorphometric-analysis
#12
Manu Krishnan, Aatish Tennavan, Seema Saraswathy, Tarun Sekhri, Ajay Kumar Singh, Velu Nair
Background: Radiation-induced xerostomia is a distressing clinical condition that starts appearing from the initial stages of radiotherapy in head and neck cancer patients. Though submandibular glands contribute to maximum of the "resting salivary" secretions, most of the acute xerostomia experiments so far reported have been on animal parotid glands. Therefore, we assessed and quantified the histologic changes in submandibular glands of Sprague-Dawley (SD) rats using histomorphometry, 24 hours after radiation...
April 2017: World Journal of Oncology
https://www.readbyqxmd.com/read/29131404/efficacy-of-radiation-therapy-for-the-treatment-of-sialocele-in-dogs
#13
V J Poirier, S Mayer-Stankeová, J Buchholz, D M Vail, B Kaser Hotz
BACKGROUND: Sialocele is a collection of saliva that has leaked from a damaged salivary gland or duct and is surrounded by granulation tissue. Surgery is the recognized first-line treatment. Recurrence rate after surgery is 5-14%. Salivary gland tissue is very sensitive to radiation therapy (RT). HYPOTHESIS/OBJECTIVES: Radiation therapy will be useful for the treatment of sialocele. The aims were to characterize response rate and clinical course of dogs with sialocele treated with RT and to determine a starting dose for clinical use...
November 13, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29114601/elective-nodal-dose-of-60%C3%A2-gy-or-50%C3%A2-gy-in-head-and-neck-cancers-a-matched-pair-analysis-of-outcomes-and-toxicity
#14
Vedang Murthy, Lavanya Gurram, Sadhana Kannan, Minakshi Gandhi, Tejpal Gupta, Sarbani Ghosh Laskar, Ashwini Budrukkar, Jai Prakash Agarwal
Purpose: The main objective of this study was to evaluate appropriate doses for elective nodal irradiation (ENI) in head and neck squamous cell carcinoma (HNSCC) patients to optimize the therapeutic ratio. Methods and materials: A matched pair analysis of 2 similar cohorts of HNSCC treated with intensity modulated radiation therapy with different dose prescriptions to the elective nodal regions was conducted. One group received 60 Gy, whereas the other received 50 Gy (ENI60 and ENI50 groups, respectively)...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29109791/can-molecular-profiling-enhance-radiotherapy-impact-of-personalized-targeted-gold-nanoparticles-on-radiosensitivity-and-imaging-of-adenoid-cystic-carcinoma
#15
Inbal Hazkani, Menachem Motiei, Oshra Betzer, Tamar Sadan, Dimitri Bragilovski, Leon Lubimov, Aviram Mizrachi, Tuvia Hadar, Mattan Levi, Irit Ben-Aharon, Izhack Haviv, Rachela Popovtzer, Aron Popovtzer
Personalized molecular profiling has an established role in selection of treatment for metastatic disease; however, its role in improving radiosensitivity and functional imaging has not been evaluated. In the current study, we examined molecular profiling as a tool for designing personalized targeted gold nanoparticles (GNP) to serve as dual-modal tumor radiosensitizers and functional imaging enhancers. To this end, molecular profiling of a patient's salivary gland adenoid cystic carcinoma (ACC) was performed, and anaplastic lymphoma kinase (ALK) mutation was detected...
2017: Theranostics
https://www.readbyqxmd.com/read/29080017/safety-pharmacokinetics-metabolism-and-radiation-dosimetry-of-18-f-tetrafluoroborate-18-f-tfb-in-healthy-human-subjects
#16
Huailei Jiang, Nicholas R Schmit, Alex R Koenen, Aditya Bansal, Mukesh K Pandey, Robert B Glynn, Bradley J Kemp, Kera L Delaney, Angela Dispenzieri, Jamie N Bakkum-Gamez, Kah-Whye Peng, Stephen J Russell, Tina M Gunderson, Val J Lowe, Timothy R DeGrado
BACKGROUND: (18)F-Tetrafluoroborate ((18)F-TFB) is a promising iodide analog for PET imaging of thyroid cancer and sodium/iodide symporter (NIS) reporter activity in viral therapy applications. The aim of this study was to evaluate the safety, pharmacokinetics, biodistribution, and radiation dosimetry of high-specific activity (18)F-TFB in healthy human subjects. METHODS: (18)F-TFB was synthesized with specific activity of 3.2 ± 1.3 GBq/μmol (at the end of synthesis)...
October 27, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/29038831/recovery-from-sublethal-damage-and-potentially-lethal-damage-proton-beam-irradiation-vs-x%C3%A2-ray-irradiation
#17
Shingo Hashimoto, Chikao Sugie, Hiromitsu Iwata, Hiroyuki Ogino, Chihiro Omachi, Keisuke Yasui, Jun-Etsu Mizoe, Yuta Shibamoto
PURPOSE: In order to clarify the biological response of tumor cells to proton beam irradiation, sublethal damage recovery (SLDR) and potentially lethal damage recovery (PLDR) induced after proton beam irradiation at the center of a 10 cm spread-out Bragg peak (SOBP) were compared with those seen after X‑ray irradiation. METHODS: Cell survival was determined by a colony assay using EMT6 and human salivary gland tumor (HSG) cells. First, two doses of 4 Gy/GyE (Gray equivalents, GyE) were given at an interfraction interval of 0-6 h...
October 16, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28990673/clinical-characteristics-and-outcomes-of-major-salivary-gland-malignancies-in-children
#18
Shannon Radomski, Sarah Dermody, Earl H Harley
OBJECTIVES/HYPOTHESIS: Determine demographics, clinical characteristics, and survival rates for children with primary salivary gland malignancies. STUDY DESIGN: Retrospective, population-based cohort study. METHODS: All cases of primary salivary gland malignancies diagnosed between the years of 2002 and 2013 in patients ages 0 to 19 years were extracted from the National Cancer Institute's Surveillance, Epidemiology, and End Results database...
October 9, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28986509/why-targeting-psma-is-a-game-changer-in-the-management-of-prostate-cancer-%C3%A2-a-urologist-s-point-of-view
#19
Nicholas M Donin, Robert Reiter
Prostate-specific membrane antigen (PSMA), is a transmembrane glycoprotein that is highly expressed on prostate adenocarcinomas, exhibits only limited expression in benign and extra-prostatic tissues, and thus represents an ideal target for the diagnosis and management of prostate cancer. Since its discovery over 30 years ago, significant effort has been made to develop clinical technology targeting PSMA. The last 5 years have seen an explosion of development of new agents targeting PSMA for diagnostic and therapeutic use...
October 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28949251/sialendoscopy-in-the-management-of-radioiodine-induced-sialadenitis-a-systematic-review
#20
REVIEW
Thai-Duong Cung, Wanda Lai, Peter F Svider, Curtis Hanba, Julie Samantray, Adam J Folbe, Mahdi Shkoukani, Syed Naweed Raza
OBJECTIVES: Salivary gland dysfunction as a consequence of radioiodide ablation is present in as many as two-thirds of patients, and unfortunately, many of these individuals do not respond to conservative measures. Sialendoscopy as a minimally invasive therapeutic modality may have utility in the treatment of radioiodide induced sialadenitis (RAIS). Our aim was to explore whether sialendoscopy resulted in clinical improvement in patients with RAIS. METHODS: A systematic review of studies on sialendoscopy for RAIS was conducted using MEDLINE database, Embase, and Cochrane Library...
November 2017: Annals of Otology, Rhinology, and Laryngology
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