In vivo metabolic imaging of early stage oral cancer and dysplasia based on autofluorescence lifetime endoscopy (Conference Presentation)

2018 ◽  
Author(s):  
Elvis Duran ◽  
Dae Yon Hwang ◽  
Shuna Cheng ◽  
Rodrigo Cuenca ◽  
Bilal H. Malik ◽  
...  
Keyword(s):  
Oral Cancer ◽  
Early Stage ◽  
Metabolic Imaging

scholarly journals Enhanced detection of early-stage oral cancer in vivo by optical coherence tomography using multimodal delivery of gold nanoparticles

2009 ◽  
Vol 14 (3) ◽  
pp. 034008 ◽  
Author(s):  
Chang Soo Kim ◽  
Petra Wilder-Smith ◽  
Yeh-Chan Ahn ◽  
Lih-Huei L. Liaw ◽  
Zhongping Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Coherence Tomography ◽  
Oral Cancer ◽  
Early Stage ◽  
Optical Coherence

scholarly journals Light-based headways: An innovation in oral cancer espial

2017 ◽  
Vol 04 ◽  
pp. 1
Author(s):  
Mankirat Kaur Gill ◽  
Simarpreet Singh ◽  
Anmol Mathur ◽  
Neha Gupta ◽  
Diljot Kaur Makkar ◽  
...  
Keyword(s):  
Oral Cancer ◽  
Early Detection ◽  
Early Stage ◽  
Tissue Imaging ◽  
Advanced Stage ◽  
Effective Management ◽  
Detection Capability ◽  
Cancer Early Detection ◽  
The World

Oral cancer is one of the most common malignancies in the world, mainly because of the widespread consumption of tobacco and related products. Early detection is very important in the management of oral cancer. However, when the lesion is detected in the oral cavity, it is at a much advanced stage for effective management, resulting in morbidity and mortality. A majority of deaths related to cancer are due in part to late diagnosis. In order to improve the clinical outcome of oral cancer, early detection is very important. One of the emerging technologies in the early detection of oral cancer is the use of noninvasive in vivo tissue imaging that captures the molecular changes at high resolution to improve the detection capability of oral cancer at an early stage.

scholarly journals Detection of Oral Dysplastic and Early Cancerous Lesions by Polarization-Sensitive Optical Coherence Tomography

Cancers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2376
Author(s):  
Ping-Hsien Chen ◽  
Hung-Yi Lee ◽  
Yi-Fen Chen ◽  
Yi-Chen Yeh ◽  
Kuo-Wei Chang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Oral Cancer ◽  
Early Stage ◽  
Optical Coherence ◽  
Predictive Values ◽  
Early Stage Cancer ◽  
Oral Cancers ◽  
Cancerous Lesions ◽  
Oral Malignancy

Detection of oral dysplastic and early-stage cancerous lesions is difficult with the current tools. Half of oral cancers are diagnosed in a late stage. Detection of early stromal change to predict malignant transformation is a new direction in the diagnosis of early-stage oral cancer. The application of new optical tools to image stroma in vivo is under investigation, and polarization-sensitive optical coherence tomography (PS-OCT) is potentially one of those tools. This is a preliminary study to sequentially image oral stromal changes from normal, hyperplasia, and dysplasia to early-stage cancer by PS-OCT in vivo. We used 4-Nitroquinoline-1-oxide drinking water to induce dysplasia and early-stage oral cancer in 19 K14-EGFP-miR-211-GFP transgenic mice. A total of 8 normal, 12 hyperplastic, 11 dysplastic, and 4 early-stage cancerous lesions were enrolled. A new analytic process of PS-OCT imaging was proposed, called an en-face birefringence map. From the birefringence map, the sensitivity, specificity, positive predictive value, and negative predictive values to detect dysplasia and early-stage cancer were 100.00%, 95.00%, 93.75%, and 100.00%, respectively, and the kappa value of these images between two investigators was 0.942. The mean size of malignant lesions detected in this study is 1.66 ± 0.93 mm. This pilot animal study validates the use of PS-OCT to detect small and early-stage oral malignancy with high accuracy and consistency.

Adenosine Diphosphate (ADP)-Induced ⍺-Granules Release from Platelets of Native Whole Blood Is Reduced by Ticlopidine but Not by Aspirin or Dipyridamole

1986 ◽  
Vol 56 (02) ◽  
pp. 147-150 ◽  
Author(s):  
V Pengo ◽  
M Boschello ◽  
A Marzari ◽  
M Baca ◽  
L Schivazappa ◽  
...  
Keyword(s):  
Whole Blood ◽  
Light Transmission ◽  
Ex Vivo ◽  
Early Stage ◽  
Shape Change ◽  
Adenosine Diphosphate ◽  
Dose Dependent ◽  
Plateletderived Growth Factor ◽  
Platelet Shape

SummaryA brief contact between native whole blood and ADP promotes a dose-dependent release of platelet a-granules without a fall in the platelet number. We assessed the “ex vivo” effect of three widely used antiplatelet drugs, aspirin dipyridamole and ticlopidine, on this system. Aspirin (a single 800 mg dose) and dipyridamole (300 mg/die for four days) had no effect, while ticlopidine (500 mg/die for four days) significantly reduced the a-granules release for an ADP stimulation of 0.4 (p <0.02), 1.2 (p <0.01) and 2 pM (p <0.01). No drug, however, completeley inhibits this early stage of platelet activation. The platelet release of α-granules may be related to platelet shape change of the light transmission aggregometer and may be important “in vivo” by enhancing platelet adhesiveness and by liberating the plateletderived growth factor.

scholarly journals Triptolide suppresses oral cancer cell PD-L1 expression in the interferon-γ-modulated microenvironment in vitro, in vivo, and in clinical patients

2021 ◽  
Vol 133 ◽  
pp. 111057
Author(s):  
Chin-Shan Kuo ◽  
Cheng-Yu Yang ◽  
Chih-Kung Lin ◽  
Gu-Jiun Lin ◽  
Huey-Kang Sytwu ◽  
...  
Keyword(s):  
Oral Cancer ◽  
Cancer Cell ◽  
Interferon Γ ◽  
Oral Cancer Cell

scholarly journals Perivascular vital cells in the ablation center after multibipolar radiofrequency ablation in an in vivo porcine model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
F. G. M. Poch ◽  
C. A. Neizert ◽  
B. Geyer ◽  
O. Gemeinhardt ◽  
S. M. Niehues ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Early Stage ◽  
Pringle Maneuver ◽  
Vessel Diameter ◽  
Inflow Occlusion ◽  
White Zone ◽  
Cell Vitality ◽  
Internally Cooled ◽  
Hepatic Vessels

AbstractMultibipolar radiofrequency ablation (RFA) is an advanced ablation technique for early stage hepatocellular carcinoma and liver metastases. Vessel cooling in multibipolar RFA has not been systematically investigated. The objective of this study was to evaluate the presence of perivascular vital cells within the ablation zone after multibipolar RFA. Multibipolar RFA were performed in domestic pigs in vivo. Three internally cooled bipolar RFA applicators were used simultaneously. Three experimental settings were planned: (1) inter-applicator-distance: 15 mm; (2) inter-applicator-distance: 20 mm; (3) inter-applicator-distance: 20 mm with hepatic inflow occlusion (Pringle maneuver). A vitality staining was used to analyze liver cell vitality around all vessels in the ablation center with a diameter > 0.5 mm histologically. 771 vessels were identified. No vital tissue was seen around 423 out of 429 vessels (98.6%) situated within the central white zone. Vital cells could be observed around major hepatic vessels situated adjacent to the ablation center. Vessel diameter (> 3.0 mm; p < 0.05) and low vessel-to-ablation-center distance (< 0.2 mm; p < 0.05) were identified as risk factors for incomplete ablation adjacent to hepatic vessels. The vast majority of vessels, which were localized in the clinically relevant white zone, showed no vital perivascular cells, regardless of vessel diameter and vessel type. However, there was a risk of incomplete ablation around major hepatic vessels situated directly within the ablation center. A Pringle maneuver could avoid incomplete ablations.

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