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- W2080349622 abstract "Preconditioning tissues with an initial mild thermal stress, thereby eliciting a stress response, can serve to protect tissue from subsequent stresses. Patients at risk for impaired healing, such as diabetics, can benefit from therapeutic methods which enhance wound repair. We present a laser thermal preconditioning protocol that accelerates cutaneous wound repair in a murine model. A pulsed diode laser (λ = 1.86 μm, τ<sub>p</sub> = 2 ms, 50 Hz, H = 7.64 mJ/cm<sup>2</sup>) was used to precondition mouse skin before incisional wounds were made. The preconditioning protocol was optimized <i>in vitro</i> and <i>in vivo</i> using hsp70 expression, cell viability, and temperature measurements as benchmarks. Hsp70 expression was non-invasively monitored using a transgenic mouse strain with the hsp70 promoter driving luciferase expression. Tissue temperature recordings were acquired in real time using an infrared camera. Wound repair was assessed by measuring hsp70 expression, biomechanical properties, and wound histology for up to 24 d. Bioluminescence (BLI) was monitored with the IVIS 200 System (Xenogen) and tensile properties with a tensiometer (BTC-2000). The <i>in vivo</i> BLI studies indicated that the optimized laser preconditioning protocol increased hsp70 expression by 15-fold. The tensiometer data revealed that laser preconditioned wounds are ~40% stronger than control wounds at 10 days post surgery. Similar experiments in a diabetic mouse model also enhanced wound repair strength. These results indicate that 1) noninvasive imaging methods can aid in the optimization of novel laser preconditioning methods; 2) that optimized preconditioning with a 1.86 μm diode laser enhances early wound repair." @default.
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- W2080349622 date "2008-02-07" @default.
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- W2080349622 title "Laser thermal preconditioning enhances dermal wound repair" @default.
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- W2080349622 doi "https://doi.org/10.1117/12.767258" @default.
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