This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Impact of hypertonic-hyperoncotic saline solutions on ischemia-reperfusion injury in pedicled flaps in rats, as measured by Modulated Imaging tissue spectroscopy. Tissue transfer flaps are a method of moving any tissue from a donor area of the body to a recipient site. The reconstructive surgeon employs two major types of tissue transfer flaps, the pedicled tissue transfer flap and the free tissue transfer flap. A pedicle flap consists of soft tissues connected to the donor location only by the artery and vein, which provide the blood supply to the pedicled tissue transfer flap. The tissues of the pedicled flap are moved from the donor site to the recipient site by rotating the soft tissue of the flap on the arteries and veins, thereby allowing the transfer of tissue from one location to another on the body. In a free tissue transfer flap the arteries and veins are divided from the donor site, and re-attached to the recipient site using microsurgical techniques. Improved surgical techniques have resulted in a high percentage of successful tissue transfer flaps for tissue defects after trauma or oncological ablative surgery. However, flap failures still occur and are usually caused by global insufficiency of blood supply secondary to mechanical obstruction of the vessels, systemic disease, or the ischemia-reperfusion (I/R) injury. This I/R injury occurs directly after reestablishment of the blood flow to ischemic tissues, this process occurs to some extent with all free tissue transfer flaps as the flap is transiently ischemic during the period between detachment from the donor site and re-attachment at the recipient site. I/R injury can also occur with pedicle flaps as well if the blood supply to the flap is interrupted due to """"""""kinking"""""""" or external compression of the arteries and / or veins to the flap. Severe I/R injury can result in vascular damage within the tissue transfer flap, leading to poor blood flow and further ischemia, which can result in partial or complete flap loss. Partial or complete flap loss can be devastating to patients undergoing reconstructive surgery. Hypertonic-hyperoncotic saline (HHS) solutions are solutions that contain high concentrations of salts. Prior clinical and animal studies have found that the administration of HHS solutions at the time of re-establishment of blood flow to ischemic tissue can lessen the extent and severity of I/R injury. The goal of this specific research project is to test the impact of HHS solutions on the I/R injury after re-establishment of blood flow to an ischemic tissue transfer flap. We hypothesize that these solutions are able to minimize the effects of I/R injury after the restoration of blood flow to ischemic tissues and thus increase overall flap survival. We believe from our prior experiments and results using hypertonic saline in a rat free flap model that this is the case. This experiment attempts to measure the improved microvascular blood flow by using Modulated Imaging (MI) Spectroscopy. We plan to do so by using MI spectroscopy to demonstrate the changes in total, oxygenated, and deoxygenated hemoglobin as well as the changes in water content within an ischemic flap after reperfusion when treated with hypertonic saline.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001192-32
Application #
8362681
Study Section
Special Emphasis Panel (ZRG1-SBIB-L (40))
Project Start
2011-04-01
Project End
2012-03-31
Budget Start
2011-04-01
Budget End
2012-03-31
Support Year
32
Fiscal Year
2011
Total Cost
$17,582
Indirect Cost
Name
University of California Irvine
Department
Physiology
Type
Schools of Medicine
DUNS #
046705849
City
Irvine
State
CA
Country
United States
Zip Code
92697
Takesh, Thair; Sargsyan, Anik; Lee, Matthew et al. (2017) Evaluating the Whitening and Microstructural Effects of a Novel Whitening Strip on Porcelain and Composite Dental Materials. Dentistry (Sunnyvale) 7:
Jonscher, Karen R; Stewart, Michael S; Alfonso-Garcia, Alba et al. (2017) Early PQQ supplementation has persistent long-term protective effects on developmental programming of hepatic lipotoxicity and inflammation in obese mice. FASEB J 31:1434-1448
Takesh, Thair; Sargsyan, Anik; Anbarani, Afarin et al. (2017) Effects of a Novel Whitening Formulation on Dental Enamel. Dentistry (Sunnyvale) 7:
Alfonso-García, Alba; Paugh, Jerry; Farid, Marjan et al. (2017) A machine learning framework to analyze hyperspectral stimulated Raman scattering microscopy images of expressed human meibum. J Raman Spectrosc 48:803-812
Alfonso-García, Alba; Pfisterer, Simon G; Riezman, Howard et al. (2016) D38-cholesterol as a Raman active probe for imaging intracellular cholesterol storage. J Biomed Opt 21:61003
Malacrida, Leonel; Astrada, Soledad; Briva, Arturo et al. (2016) Spectral phasor analysis of LAURDAN fluorescence in live A549 lung cells to study the hydration and time evolution of intracellular lamellar body-like structures. Biochim Biophys Acta 1858:2625-2635
Choi, Bernard; Tan, Wenbin; Jia, Wangcun et al. (2016) The Role of Laser Speckle Imaging in Port-Wine Stain Research: Recent Advances and Opportunities. IEEE J Sel Top Quantum Electron 2016:
Wang, Mingqiu; Ravindranath, Shreyas R; Rahim, Maha K et al. (2016) Evolution of Multivalent Nanoparticle Adhesion via Specific Molecular Interactions. Langmuir 32:13124-13136
Alfonso-García, Alba; Smith, Tim D; Datta, Rupsa et al. (2016) Label-free identification of macrophage phenotype by fluorescence lifetime imaging microscopy. J Biomed Opt 21:46005
Prince, Richard C; Frontiera, Renee R; Potma, Eric O (2016) Stimulated Raman Scattering: From Bulk to Nano. Chem Rev :

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