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Technetium 99m

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https://www.readbyqxmd.com/read/28070848/intravaginal-delivery-of-polyphenon-60-and-curcumin-nanoemulsion-gel
#1
Atinderpal Kaur, Yashaswee Saxena, Rakhi Bansal, Sonal Gupta, Amit Tyagi, Rakesh Kumar Sharma, Javed Ali, Amulya Kumar Panda, Reema Gabrani, Shweta Dang
Polyphenon 60 (P60) and curcumin (CUR) were loaded in a single nanoemulsion system and their combined antibacterial action was studied against uropathogenic Escherichia coli. To enhance availability at target organs and to inhibit enzymatic degradation in gastro intestinal tract, vaginal route of administration was explored. P60 + CUR nanoemulsion (NE) was formulated by ultra-sonication and optimized using Box-Behnken design. Optimized NE showed Z-average of 211.2 nm, polydispersity index of 0.343, and zeta potential of -32...
January 9, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28063322/quantitation-of-rat-cerebral-blood-flow-using-99m-tc-hmpao
#2
Chie Suzuki, Shintaro Kimura, Mutsumi Kosugi, Yasuhiro Magata
INTRODUCTION: Technetium-99m-hexamethylpropyleneamine oxime ((99m)Tc-HMPAO) is potentially useful for the assessment of cerebral blood flow (CBF) in small animals. In this paper, a procedure for quantitation of rat CBF using (99m)Tc-HMPAO was determined. METHODS: Biodistribution of (99m)Tc-radioactivity in normal rats was determined after intravenous administration of (99m)Tc-HMPAO. Acetazolamide treated rats were intravenously administered with the mixture of (99m)Tc-HMPAO and N-isopropyl-[(125)I]iodoamphetamine ([(125)I]IMP), and arterial blood was then collected for 5min...
December 22, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28056732/development-of-a-radiolabeled-amlodipine-analog-for-l-type-calcium-channel-imaging
#3
Tahereh Firouzyar, Amir Reza Jalilian, Mohammad Reza Aboudzadeh, Hossein Sadeghpour, Mehrban Pooladi, Mahdi Shafiee-Ardestani, Ali Khalaj
PURPOSE: The non-invasive imaging and quantification of L-type calcium channels in living tissues is of great interest in diagnosis of congestive heart failure, myocardial hypertrophy, irritable bowel syndrome etc. METHODS: Technetium-<sup>99m</sup> labeled amlodipine conjugate ([<sup>99m</sup>Tc]-DTPA-AMLO) was prepared starting freshly eluted (<1 h) <sup>99m</sup>Technetium pertechnetate (86.5 MBq) and conjugated DTPA-AMLO at pH 5 in 30 min at room temperature in high radiochemical purity (>99%, RTLC; specific activity: 55-60 GBq/mmol)...
January 4, 2017: Current Radiopharmaceuticals
https://www.readbyqxmd.com/read/28053523/anti-muc1-nano-aptamers-for-triple-negative-breast-cancer-imaging-by-single-photon-emission-computed-tomography-in-inducted-animals-initial-considerations
#4
Fagner Santos do Carmo, Eduardo Ricci-Junior, Cristal Cerqueira-Coutinho, Marta de Souza Albernaz, Emerson Soares Bernardes, Sotiris Missailidis, Ralph Santos-Oliveira
The early and specific detection of tumors remains a barrier in oncology, especially in cases such as the triple-negative breast cancer (TNBC). To address this gap, aptamers have found an important application in the recognition of tumor biomarkers such as mucin 1 (MUC1). However, there are still some difficulties in the use of aptamer, as their rapid biological clearance makes their use as drugs limited. In this study, the anti-MUC1 aptamer was used as a drug delivery system (DDS) for a radioactive polymeric nanoparticle (NP) in the imaging of TNBCs...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28034704/antioxidants-taken-orally-prior-to-diagnostic-radiation-exposure-can-prevent-dna-injury
#5
Nivethan Velauthapillai, Joe Barfett, Hussein Jaffer, David Mikulis, Kieran Murphy
PURPOSE: To evaluate efficacy of oral antioxidant treatment given to patients before radiologic procedures in reducing x-ray-induced DNA damage. MATERIALS AND METHODS: In a single-center prospective controlled trial, antioxidant treatment with 2 g ascorbate, 1.2 g N-acetylcysteine, 600 mg lipoic acid, and 30 mg beta carotene was given to 5 consecutive participants before undergoing clinically indicated technetium-99m methylene diphosphonate ((99m)Tc MDP) bone scans for cancer staging...
December 26, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28027609/prediction-of-high-grade-vesicoureteral-reflux-in-children-younger-than-2-years-using-renal-sonography-a-preliminary-study
#6
Sun Kyoung You, Jong Chun Kim, Won Hong Park, So Mi Lee, Hyun-Hae Cho
OBJECTIVES: To investigate the predictive value of renal sonography for vesicoureteral reflux (VUR) and the efficacy of renal sonography, technetium Tc 99m-labeled dimercaptosuccinic acid (DMSA) scanning, and a combination of the two for VUR screening in children younger than 2 years with a first episode of febrile urinary tract infection. METHODS: Thirty-eight patients younger than 2 years with a first febrile urinary tract infection were included in our study, which was conducted from April through October 2014...
April 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28027110/unaltered-dopamine-transporter-availability-in-drug-naive-patients-with-schizophrenia-after-6-months-of-antipsychotics-treatment-a-naturalistic-study
#7
Wei Hung Chang, Kao Chin Chen, I Hui Lee, Mei Hung Chi, Po See Chen, Wei Jen Yao, Nan Tsing Chiu, Yen Kuang Yang
BACKGROUND: Dopaminergic dysfunction, namely, dopamine transporter (DAT) availability variations in patients with drug-naive schizophrenia after long-term treatment, is still not well understood. The aims of the study were to explore (i) whether the DAT availability in patients with drug-naive schizophrenia differed after antipsychotic treatment and (ii) whether treatment with different generations of antipsychotics influenced the DAT availability after follow-up for 6 months. METHODS: Twenty-four first-episode, drug-naive patients with schizophrenia were divided into first- and second-generation antipsychotic groups naturalistically...
February 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28007370/in-vivo-biodistribution-of-antihyperglycemic-biopolymer-based-nanoparticles-for-the-treatment-of-type-1-and-type-2-diabetes
#8
Marlene Lopes, Denise Aniceto, Margarida Abrantes, Susana Simões, Fábio Branco, Isabel Vitória, M Filomena Botelho, Raquel Seiça, Francisco Veiga, António Ribeiro
This study aimed to assess the biodistribution of antihyperglycemic insulin-loaded alginate/dextran sulfate-based nanoparticles dual coated with chitosan and technetium-99m-albumin ((99m)Tc-BSA) after oral administration. The oral administration of 50IU/kg insulin-loaded nanoparticles to type 1 diabetic rats showed prolonged antihyperglycemic effects up to 12h and relative pharmacological availability of 5.04% comparing to the subcutaneous administration. The oral antihyperglycemic effect was further compared between type 1 and type 2 diabetic models by the intraperitoneal glucose tolerance test, revealing that the effect lasted longer in the type 1 diabetic model...
December 19, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28002156/technetium-99m-albumin-scintigraphy-in-protein-losing-gastroenteropathy-with-systemic-lupus-erythematosus-typical-diagnostic-pattern-of-radiotracer-leakage-and-chronological-improvement-by-treatment
#9
Akira Nishino, Masanori Hanaoka, Yasuhiro Katsumata, Yasushi Kawaguchi, Hisashi Yamanaka
No abstract text is available yet for this article.
January 2017: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/27998671/synthesis-physicochemical-and-biological-studies-of-technetium-99m-labeled-tacrine-derivative-as-a-diagnostic-tool-for-evaluation-of-cholinesterase-level
#10
Ewa Gniazdowska, Przemysław Koźmiński, Marek Wasek, Marek Bajda, Joanna Sikora, Elżbieta Mikiciuk-Olasik, Paweł Szymański
In the present work the synthesis and physicochemical investigations of new tacrine analogues labeled with technetium-99m are reported. All obtained novel radioconjugates showed high stability in the presence of an excess of standard amino acids cysteine or histidine, as well as in human serum. Lipophilicity (LogD values) of these compounds is within the range from 0.92 to 1.56. For the selected radioconjugate (99m)Tc(NS3)(CN-NH(CH2)7Tac) (LogD=1.56) the biological activity studies in the course of inhibition of acetylcholinesterase action have been performed (IC50=45...
December 7, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27994638/platelet-12-lipoxygenase-targeting-via-a-newly-synthesized-curcumin-derivative-radiolabeled-with-technetium-99m
#11
Reem Ibrahim Al-Wabli, Tamer Mostafa Mohamed Hafez Sakr, Mohammed Abdou Khedr, Adly Abdallah Selim, Mohamed Abd El-Motaleb Abd El-Rahman, Wafaa Abdou Zaghary
BACKGROUND: One of the most popular techniques for cancer detection is the nuclear medicine technique. The present research focuses on Platelet-12-lipoxygenase (P-12-LOX) as a promising target for treating and radio-imaging tumor tissues. Curcumin was reported to inhibit this enzyme via binding to its active site. RESULTS: A novel curcumin derivative was successfully synthesized and characterized with yield of 74%. It was radiolabeled with the diagnostic radioisotope technetium-99m with 84% radiochemical yield and in vitro stability up to 6 h...
2016: Chemistry Central Journal
https://www.readbyqxmd.com/read/27986208/advances-in-prostate-cancer-magnetic-resonance-imaging-and-positron-emission-tomography-computed-tomography-for-staging-and-radiotherapy-treatment-planning
#12
REVIEW
Drew Moghanaki, Baris Turkbey, Neha Vapiwala, Behfar Ehdaie, Steven J Frank, Patrick W McLaughlin, Mukesh Harisinghani
Conventional prostate cancer staging strategies have limited accuracy to define the location, grade, and burden of disease. Evaluations have historically relied upon prostate-specific antigen levels, digital rectal examinations, random systematic biopsies, computed tomography, pelvic lymphadenectomy, or (99m)technetium methylene diphosphonate bone scans. Today, risk-stratification tools incorporate these data in a weighted format to guide management. However, the limitations and potential consequences of their uncertainties are well known...
January 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/27981843/radiolabeled-rhein-as-novel-small-molecule-necrosis-avid-agents-for-rapid-imaging-of-necrotic-myocardium
#13
Qi Luo, Qiaomei Jin, Chang Su, Dongjian Zhang, Cuihua Jiang, Anne Folta Fish, Yuanbo Feng, Yicheng Ni, Jian Zhang, Zhiqi Yin
A rapid and accurate identification of necrotic myocardium is of great importance for diagnosis, risk stratification, clinical decision-making, and prognosis evaluation of myocardial infarction. Here we explored technetium-99m labeled rhein derivatives for rapid imaging of the necrotic myocardium. Three hydrazinonicotinic acid-linker-rhein (HYNIC-linker-rhein) derivatives were synthesised and then these synthetic compounds were labeled with technetium-99m using ethylenediaminediacetic acid (EDDA) and tricine as coligands [99mTc(EDDA)-HYNIC-linker-rhein]...
December 16, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27981470/immunoglobulin-g-igg-based-imaging-probe-accumulates-in-m1-macrophage-infiltrated-atherosclerotic-plaques-independent-of-igg-target-molecule-expression
#14
Yoichi Shimizu, Hiroko Hanzawa, Yan Zhao, Sagiri Fukura, Ken-Ichi Nishijima, Takeshi Sakamoto, Songji Zhao, Nagara Tamaki, Mikako Ogawa, Yuji Kuge
PURPOSE: Vulnerable plaques are key factors for ischemic diseases. Thus, their precise detection is necessary for the diagnosis of such diseases. Immunoglobulin G (IgG)-based imaging probes have been developed for imaging biomolecules related to plaque formation for the diagnosis of atherosclerosis. However, IgG accumulates nonspecifically in atherosclerotic regions, and its accumulation mechanisms have not yet been clarified in detail. Therefore, we explored IgG accumulation mechanisms in atherosclerotic lesions and examined images of radiolabeled IgG for the diagnosis of atherosclerosis...
December 15, 2016: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/27951452/-1%C3%A2-3-%C3%AE-d-glucan-aptamers-labeled-with-technetium-99m-biodistribution-and-imaging-in-experimental-models-of-bacterial-and-fungal-infection
#15
Camila Maria de Sousa Lacerda, Iêda Mendes Ferreira, Sara Roberta Dos Santos, André Luís Branco de Barros, Simone Odília Fernandes, Valbert Nascimento Cardoso, Antero Silva Ribeiro de Andrade
INTRODUCTION: Acid nucleic aptamers are RNA or DNA oligonucleotides capable of binding to a target molecule with high affinity and selectivity. These molecules are promising tools in nuclear medicine. Many aptamers have been used as targeting molecule of radiopharmaceuticals in preclinical studies. (1→3)-β-D-glucans are the main structural cell wall components of fungi and some bacteria. In the present study two radiolabeled (1→3)-β-D-glucan aptamers (seq6 and seq30) were evaluated to identity infectious foci caused by fungal or bacterial cells...
November 29, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/27941121/a-novel-copolymer-based-functional-spect-mr-imaging-agent-for-asialoglycoprotein-receptor-targeting
#16
Pu Zhang, Zhide Guo, Deliang Zhang, Chang Liu, Guibing Chen, Rongqiang Zhuang, Manli Song, Hua Wu, Xianzhong Zhang
The aim of this study is to develop a copolymer-based single-photon emission computed tomography/magnetic resonance (SPECT/MR) dual-modality imaging agent that can be labeled with both technetium-99m ((99m)Tc) and gadolinium (Gd) and target asialoglycoprotein receptor (ASGPR) via galactose. Monomers of N-p-vinylbenzyl-6-(2-(4-dimethylamino)benzaldehydehydrazono) nicotinate (VNI) for labeling of (99m)Tc, 5,8-bis(carboxymethyl)-3-oxo-11-(2-oxo-2-((4-vinylbenzyl)amino)ethyl)-1-(4-vinylphenzyl)-2,5,8,11-tetraazatridecan-13-oic acid (V2DTPA) for labeling of Gd, and vinylbenzyl-O-β-d-galactopyranosyl-d-gluconamide (VLA) for targeting ASGPR were synthesized, respectively...
2016: Molecular Imaging
https://www.readbyqxmd.com/read/27937056/scintigraphy-for-detecting-tumour-necrosis-factor-%C3%AE-on-the-skin-of-patients-with-psoriatic-arthritis
#17
Sal de Souza, V Nentzinsky, Ccm do Carmo, L Roimicher, Lmb da Fonseca, B Gutfilen
OBJECTIVE: This study assessed the use of scintigraphy and magnetic resonance imaging (MRI) in identifying the presence and amount of tumour necrosis factor-α (TNF-α) in the joint or skin of patients with psoriatic arthritis, to guide the course of treatment more efficiently. METHOD: We compared the results of scintigraphy and MRI in two patients with psoriatic arthritis who underwent technetium-99m ((99m)Tc)-anti-TNF-α scintigraphy, and MRI 5 days later. RESULTS: Greater uptake of (99m)Tc-anti-TNF-α was observed in the left wrist and right second metacarpal in patient 1, and in the left ulnocarpal joint and distal interphalangeal joint of the left first metacarpal in patient 2...
December 12, 2016: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/27932562/intraoperative-assessment-of-tumor-resection-margins-in-breast-conserving-surgery-using-18f-fdg-cerenkov-luminescence-imaging-a-first-in-human-feasibility-study
#18
Maarten Ruben Grootendorst, Massimiliano Cariati, Sarah Pinder, Ashutosh Kothari, Michael Douek, Tibor Kovacs, Hisham Hamed, Amit Pawa, Fiona Nimmo, Julie Owen, Vernie Ramalingam, Sweta Sethi, Sanjay Mistry, Kunal Vyas, David Tuch, Alan Britten, Mieke Van Hemelrijck, Gary Cook, Chris Sibley-Allen, Sarah Allen, Arnie Purushotham
RATIONALE: In early-stage breast cancer, the primary treatment option for the majority of women is breast-conserving surgery (BCS). There is a clear need for more accurate techniques to assess resection margins intraoperatively, as on average 20% of patients require further surgery to achieve clear margins. Cerenkov luminescence imaging (CLI) combines optical and molecular imaging by detecting light emitted by (18)F-fluorodeoxyglucose ((18)F-FDG). Its high-resolution and small size imaging equipment makes CLI a promising technology for intraoperative margin assessment...
December 8, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27924180/magnetic-resonance-spectroscopy-and-single-photon-emission-computed-tomography-in-the-evaluation-of-cerebral-tumors-a-case-report
#19
Ioannis Siasios, Varvara Valotassiou, Eftychia Kapsalaki, Ioannis Tsougos, Panagiotis Georgoulias, Aggeliki Fotiadou, Maria Ioannou, Georgios Koukoulis, Vassilios Dimopoulos, Kostas Fountas
In their daily clinical practice, physicians have to confront diagnostic dilemmas which cannot be resolved by the application of only one imaging technique. In this case report, we present a 66-year-old woman who was admitted to our institution for the surgical resection of a recently diagnosed brain tumor. The patient had a history of epileptic seizures and was hospitalized in the past for anti-phospholipid syndrome related to a non-Hodgkin lymphoma in remission. Magnetic resonance imaging (MRI) examination revealed an enhancing right parasagittal lesion with significant edema suggestive of a high grade glioma...
January 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/27924061/the-relationship-between-serum-fibrosis-markers-and-restrictive-ventricular-filling-in-patients-with-heart-failure-with-reduced-ejection-fraction-a-technetium-99m-radionuclide-ventriculography-study
#20
Yen-Tin Lin, Yen-Hung Lin, Xue-Ming Wu, Chi-Lun Ko, Ruoh-Fang Yen, Ying-Hsein Chen, Ron-Bin Hsu, Chi-Ming Lee, Shoei-Shen Wang, Ming-Fong Chen, Yen-Wen Wu
Myocardial fibrosis leads to a restrictive diastolic filling pattern of the left ventricle which is associated with a poor prognosis in patients with heart failure. We investigated the relationship between cardiac fibrosis and restrictive filling pattern of the left ventricle measured by Tc99m left ventriculography in patients with chronic symptomatic heart failure. Serum cardiac extracellular matrix markers including type I and III aminoterminal propeptide of procollagen (PINP and PIIINP), matrix metalloproteinase-2,9 (MMP-2,9), and tissue inhibitor of MMP-1 (TIMP-1) were analyzed...
December 4, 2016: Oncotarget
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