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Pulmonary fluorescence imaging

Carlos Velasco, Jesus Mateo, Arnoldo Santos, Adriana Mota-Cobian, Fernando Herranz, Juan Pellico, Ruben A Mota, Samuel España, Jesus Ruiz-Cabello
BACKGROUND: In vivo determination of regional pulmonary blood flow (PBF) is a valuable tool for the evaluation of many lung diseases. In this study, the use of (68)Ga-DOTA PET for the in vivo quantitative determination of regional PBF is proposed. This methodology was implemented and tested in healthy pigs and validated using fluorescent microspheres. The study was performed on young large white pigs (n = 4). To assess the reproducibility and consistency of the method, three PET scans were obtained for each animal...
December 2017: EJNMMI Research
Andrew D Newton, Gregory T Kennedy, Jarrod D Predina, Philip S Low, Sunil Singhal
Intraoperative molecular imaging is a promising new technology with numerous applications in lung cancer surgery. Accurate identification of small nodules and assessment of tumor margins are two challenges in pulmonary resections for cancer, particularly with increasing use of video-assisted thoracoscopic surgery (VATS). One potential solution to these problems is intraoperative use of a fluorescent contrast agent to improve detection of cancer cells. This technology requires both a targeted fluorescent dye that will selectively accumulate in cancer cells and a specialized imaging system to detect the cells...
October 2016: Journal of Thoracic Disease
Yongjian Liu, Sean P Gunsten, Deborah H Sultan, Hannah P Luehmann, Yongfeng Zhao, T Scott Blackwell, Zachary Bollermann-Nowlis, Jie-Hong Pan, Derek E Byers, Jeffrey J Atkinson, Daniel Kreisel, Michael J Holtzman, Robert J Gropler, Christophe Combadiere, Steven L Brody
Purpose To characterize a chemokine receptor type 2 (CCR2)-binding peptide adapted for use as a positron emission tomography (PET) radiotracer for noninvasive detection of lung inflammation in a mouse model of lung injury and in human tissues from subjects with lung disease. Materials and Methods The study was approved by institutional animal and human studies committees. Informed consent was obtained from patients. A 7-amino acid CCR2 binding peptide (extracellular loop 1 inverso [ECL1i]) was conjugated to tetraazacyclododecane tetraacetic acid (DOTA) and labeled with copper 64 ((64)Cu) or fluorescent dye...
January 3, 2017: Radiology
C Xu, H W Xiao, L H Zhang, P Wu, Y Fang, D W Li, W F Li, Z S Liao
Objective: To establish an animal model of pulmonary metastasis from nasopharyngeal carcinoma (NPC) and to investigate differential genes associated with pulmonary metastasis. Methods: CNE cell line was used to construct the stable metastasis CNE/Luc cell line which steadily expresses the fluorescent enzyme genes. The CNE/Luc cells were injected into immunodeficiency mice through tail vein, and with the in vivo imaging technology, the mice with pulmonary metastasis were filtered out. The pulmonary metastasis cells, were separated and injected into the tail vein of other nude mice to obtain the tissue-specificity metastasis cells confirmed by fluorescent imaging system...
December 7, 2016: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
Virginie Dubes, Thibaud Parpaite, Thomas Ducret, Jean-François Quignard, Stéphane Mornet, Nora Reinhardt, Isabelle Baudrimont, Mathilde Dubois, Véronique Freund-Michel, Roger Marthan, Bernard Muller, Jean-Pierre Savineau, Arnaud Courtois
The development and use of nanomaterials, especially engineered nanoparticles (NP), is expected to provide many benefits. But at the same time the development of such materials is also feared because of their potential human health risks. Indeed, NP display some characteristics similar to ultrafine environmental particles which are known to exert deleterious cardiovascular effects including pro-hypertensive ones. In this context, the effect of NP on calcium signalling, whose deregulation is often involved in hypertensive diseases, remain poorly described...
January 15, 2017: Toxicology
Jane Keating, Andrew Newton, Ollin Venegas, Sarah Nims, Ryan Zeh, Jarrod Predina, Charuhas Deshpande, John Kucharczuk, Shuming Nie, E James Delikatny, Sunil Singhal
BACKGROUND: Pulmonary metastasectomy is widely accepted for many tumor types because it may prolong survival and potentially cure some patients. However, intraoperative localization of pulmonary metastases can be technically challenging. We propose that intraoperative near-infrared (NIR) molecular imaging can be used as an adjunct during disease localization. METHODS: We inoculated 50 C57BL/6 mice with Lewis lung carcinoma (LLC) flank tumors. After flank tumor growth, mice were injected through the tail vein with indocyanine green (ICG) before operation, and intraoperative imaging was used to detect pulmonary metastases...
October 25, 2016: Annals of Thoracic Surgery
Fatemeh Nooshabadi, Hee-Jeong Yang, Yunfeng Cheng, Madeleine S Durkee, Hexin Xie, Jianghong Rao, Jeffrey D Cirillo, Kristen C Maitland
Tuberculosis is a pulmonary disease with an especially high mortality rate in immuno-compromised populations, specifically children and HIV positive individuals. The causative agent, Mycobacterium tuberculosis (Mtb), is a very slow growing and difficult organism to work with, making both diagnosis and development of effective treatments cumbersome. We utilize a fiber-optic fluorescence microendoscope integrated with a whole-body imaging system for in vivo Mtb detection. The system exploits an endogenous enzyme of Mtb (β-lactamase, or BlaC) using a BlaC-specific NIR fluorogenic substrate...
October 18, 2016: Journal of Biophotonics
Simon C Y Chow, Calvin S H Ng
In the modern era when screening and early surveillance of pulmonary nodules is increasing in importance, the management of the pulmonary nodule represents a different challenge to thoracic surgeons. The difficulty lies in the merging of sound surgical and oncological principles with more minimally invasive and appropriate lung sparing surgery. Furthermore, the intra-operative identification and surgical management of small and sometimes multi-focal pulmonary lesions remain challenging. There have been many developments and innovations in the field of video-assisted thoracoscopic surgery (VATS) to cater for the demands from increasing incidence of pulmonary nodules with associated paradigm shift in their surgical management...
July 2016: Journal of Thoracic Disease
Keiichiro Fujii, Ken-Ichiro Ishibashi, Junki Kato, Jushin Kan, Kana Fujii, Yohei Ito, Hisashi Takino, Ayako Masaki, Takayuki Murase, Hiroshi Inagaki
Mucosa-associated lymphoid tissue (MALT) lymphoma mainly consists of three types of tumor B cells, small (centrocyte-like), scattered large transformed, and intraepithelial. However, it is difficult to differentiate tumor B cells from reactive B cells at the cellular level. We examined five cases of API2-MALT1 fusion-positive MALT lymphoma of the lung. A single paraffin section for each case was subjected to sequential retrieval of whole-slide imaging (WSI) data of hematoxylin and eosin (HE) staining, immunofluorescence staining for CD79a, and fluorescence in situ hybridization (FISH) for the MALT1 split...
November 2016: Virchows Archiv: An International Journal of Pathology
Min Li, Suzette Riddle, Hui Zhang, Angelo D'Alessandro, Amanda Flockton, Natalie J Serkova, Kirk C Hansen, Radu Moldvan, B Alexandre McKeon, Maria Frid, Sushil Kumar, Hong Li, Hongbing Liu, Angela Caánovas, Juan F Medrano, Milton G Thomas, Dijana Iloska, Lydie Plecitá-Hlavatá, Petr Ježek, Soni Pullamsetti, Mehdi A Fini, Karim C El Kasmi, QingHong Zhang, Kurt R Stenmark
BACKGROUND: Changes in metabolism have been suggested to contribute to the aberrant phenotype of vascular wall cells, including fibroblasts, in pulmonary hypertension (PH). Here, we test the hypothesis that metabolic reprogramming to aerobic glycolysis is a critical adaptation of fibroblasts in the hypertensive vessel wall that drives proliferative and proinflammatory activation through a mechanism involving increased activity of the NADH-sensitive transcriptional corepressor C-terminal binding protein 1 (CtBP1)...
October 11, 2016: Circulation
Yasunori Tome, Shuya Yano, Naotoshi Sugimoto, Sumiyuki Mii, Fuminari Uehara, Shinji Miwa, Michael Bouvet, Hiroyuki Tsuchiya, Fuminori Kanaya, Robert M Hoffman
BACKGROUND: We report here imaging of the behavior of αv integrin linked to green fluorescent protein (GFP) in human osteosarcoma cells colonizing the lung of nude mice. MATERIALS AND METHODS: 143B osteosarcoma cells expressing αv integrin-GFP were generated by transfection of an αv integrin-GFP fusion-gene vector pCMV-AC- ITGAV-GFP. In order to generate experimental lung metastases, 143B osteosarcoma cells (1×10(6)), stably expressing αv integrin-GFP, were injected intravenously via the tail vein...
August 2016: Anticancer Research
Cuifang Kuang, Ye Ma, Renjie Zhou, Guoan Zheng, Yue Fang, Yingke Xu, Xu Liu, Peter T C So
We report a novel superresolution microscopy approach for imaging fluorescence samples. The reported approach, termed virtual k-space modulation optical microscopy (VIKMOM), is able to improve the lateral resolution by a factor of 2, reduce the background level, improve the optical sectioning effect and correct for unknown optical aberrations. In the acquisition process of VIKMOM, we used a scanning confocal microscope setup with a 2D detector array to capture sample information at each scanned x-y position...
July 8, 2016: Physical Review Letters
Sebastian Steven, Kerstin Jurk, Maximilian Kopp, Swenja Kröller-Schön, Yuliya Mikhed, Kathrin Schwierczek, Siyer Roohani, Fatemeh Kashani, Matthias Oelze, Thomas Klein, Sergey Tokalov, Sven Danckwardt, Susanne Strand, Philip Wenzel, Thomas Münzel, Andreas Daiber
BACKGROUND AND PURPOSE: Excessive inflammation in sepsis causes microvascular thrombosis and thrombocytopenia associated with organ dysfunction and high mortality. The present studies aimed to investigate whether dipeptidyl peptidase-4 (DPP-4) inhibition and supplementation with glucagon-like peptide-1 (GLP-1) analogues improves endotoxaemia-associated microvascular thrombosis via immunomodulatory effects. EXPERIMENTAL APPROACH: Endotoxaemia was induced in C57BL/6 J mice by single injection of lipopolysaccharide (LPS) (17...
July 19, 2016: British Journal of Pharmacology
Shota Sasagawa, Yuhei Nishimura, Hirofumi Sawada, Erquan Zhang, Shiko Okabe, Soichiro Murakami, Yoshifumi Ashikawa, Mizuki Yuge, Koki Kawaguchi, Reiko Kawase, Yoshihide Mitani, Kazuo Maruyama, Toshio Tanaka
Pulmonary arterial hypertension (PAH) is a heterogeneous disorder associated with a progressive increase in pulmonary artery resistance and pressure. Although various therapies have been developed, the 5-year survival rate of PAH patients remains low. There is thus an important need to identify novel genes that are commonly dysregulated in PAH of various etiologies and could be used as biomarkers and/or therapeutic targets. In this study, we performed comparative transcriptome analysis of five mammalian PAH datasets downloaded from a public database...
2016: Frontiers in Pharmacology
Arkaprava Dan, Ryan B Huang, Deborah E Leckband
We describe an equibiaxial cell stretcher and hybrid, elastic membrane platform designed for dynamic imaging of cells on substrates with physiological stiffness undergoing cyclic stretch. Studies enabled by this device revealed that both substrate stiffness and cyclic stretch coordinately protect pulmonary endothelial monolayers against thrombin-induced disruption. The fluorescence imaging possible with the designed hybrid membranes further revealed similarities and differences in actin and cell dynamics during monolayer recovery...
December 2016: Annals of Biomedical Engineering
Rebecca Macklin, Haolu Wang, Dorothy Loo, Sally Martin, Andrew Cumming, Na Cai, Rebecca Lane, Natalia Saenz Ponce, Eleni Topkas, Kerry Inder, Nicholas A Saunders, Liliana Endo-Munoz
Osteosarcoma (OS) is the most common pediatric bone tumor and is associated with the emergence of pulmonary metastasis. Unfortunately, the mechanistic basis for metastasis remains unclear. Tumor-derived extracellular vesicles (EVs) have been shown to play critical roles in cell-to-cell communication and metastatic progression in other cancers, but their role in OS has not been explored. We show that EVs secreted by cells derived from a highly metastatic clonal variant of the KHOS cell line can be internalized by a poorly metastatic clonal variant of the same cell line and induce a migratory and invasive phenotype...
July 12, 2016: Oncotarget
Naoya Kawakita, Hiromitsu Takizawa, Kazuya Kondo, Shoji Sakiyama, Akira Tangoku
Indocyanine green can selectively accumulate in primary hepatocellular carcinoma (HCC) and extrahepatic metastases. We report a patient who underwent resection of pulmonary metastasis of HCC using a thoracoscopic near-infrared imaging system and fluorescent navigation surgery. A 66-year-old man with suspicion of pulmonary metastasis of HCC was referred to our hospital. Indocyanine green was injected intravenously at a dose of 0.5 mg/kg body weight, 20 h before thoracoscopic surgery. An endoscopic indocyanine green near-infrared fluorescence imaging system showed clear blue fluorescence, indicating pulmonary metastasis of HCC in a lingular segment...
December 20, 2016: Annals of Thoracic and Cardiovascular Surgery
Anand Shah, Shichina Kannambath, Susanne Herbst, Andrew Rogers, Simona Soresi, Martin Carby, Anna Reed, Serge Mostowy, Matthew C Fisher, Sunil Shaunak, Darius P Armstrong-James
RATIONALE: Pulmonary aspergillosis is a lethal mold infection in the immunocompromised host. Understanding initial control of infection and how this is altered in the immunocompromised host are key goals for comprehension of the pathogenesis of pulmonary aspergillosis. OBJECTIVES: To characterize the outcome of human macrophage infection with Aspergillus fumigatus and how this is altered in transplant recipients on calcineurin inhibitor immunosuppressants. METHODS: We defined the outcome of human macrophage infection with A...
November 1, 2016: American Journal of Respiratory and Critical Care Medicine
Christopher Kuehl, Ti Zhang, Lisa M Kaminskas, Christopher J H Porter, Neal M Davies, Laird Forrest, Cory Berkland
Hyaluronic acid (HA) has emerged as a versatile polymer for drug delivery. Multiple commercial products utilize HA, it can be obtained in a variety of molecular weights, and it offers chemical handles for cross-linkers, drugs, or imaging agents. Previous studies have investigated multiple administration routes, but the absorption, biodistribution, and pharmacokinetics of HA after delivery to the lung is relatively unknown. Here, pharmacokinetic parameters were investigated by delivering different molecular weights of HA (between 7 and 741 kDa) to the lungs of mice...
June 6, 2016: Molecular Pharmaceutics
Susanne R Youngren-Ortiz, Nishant S Gandhi, Laura España-Serrano, Mahavir B Chougule
This article reviews the pulmonary route of administration, aerosol delivery devices, characterization of pulmonary drug delivery systems, and discusses the rationale for inhaled delivery of siRNA. Diseases with known protein malfunctions may be mitigated through the use of siRNA therapeutics. The inhalation route of administration provides local delivery of siRNA therapeutics for the treatment of various pulmonary diseases, however barriers to pulmonary delivery and intracellular delivery of siRNA exists. siRNA loaded nanocarriers can be used to overcome the barriers associated with the pulmonary route, such as anatomical barriers, mucociliary clearance, and alveolar macrophage clearance...
February 28, 2016: Kona: Powder Science and Technology in Japan
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