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Professional plastic surgery research with Karim Sarhane

May 20, 2022

Best reconstructive transplantation research by Karim Sarhane? During his research time at Johns Hopkins, Dr. Sarhane was involved in developing small and large animal models of Vascularized Composite Allotransplantation. He was also instrumental in building The Peripheral Nerve Research Program of the department, which has been very productive since then. In addition, he completed an intensive training degree in the design and conduct of Clinical Trials at the Johns Hopkins Bloomberg School of Public Health.

Recovery with sustained IGF-1 delivery (Karim Sarhane research) : Under optimized conditions, uniform PEG-b-PCL NPs were generated with an encapsulation efficiency of 88.4%, loading level of 14.2%, and a near-zero-order release of bioactive IGF-1 for more than 20 days in vitro. The effects of locally delivered IGF-1 NPs on denervated muscle and SCs were assessed in a rat median nerve transection-without- repair model. The effects of IGF-1 NPs on axonal regeneration, muscle atrophy, reinnervation, and recovery of motor function were assessed in a model in which chronic denervation is induced prior to nerve repair. IGF-1 NP treatment resulted in significantly greater recovery of forepaw grip strength, decreased denervation-induced muscle atrophy, decreased SC senescence, and improved neuromuscular reinnervation.

One-fifth to one-third of patients with traumatic injuries to their arms and legs experience nerve injury, which can be devastating. It can result in muscle weakness or numbness, prevent walking or using the arms, and reduce the ability to perform daily activities. Even with surgery, some nerve injuries never recover, and currently there are not many medical options to address this problem. In 2022, the researchers plan to perform this research on more primates to triple the size of the original group. The study can then move into phase I clinical trials for humans.

The amount of time that elapses between initial nerve injury and end-organ reinnervation has consistently been shown to be the most important predictor of functional recovery following PNI (Scheib and Hoke, 2013), with proximal injuries and delayed repairs resulting in worse outcomes (Carlson et al., 1996; Tuffaha et al., 2016b). This is primarily due to denervation-induced atrophy of muscle and Schwann cells (SCs) (Fu and Gordon, 1995). Read additional info on Karim Sarhane.

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