Static magnetic field assisted thawing improves cryopreservation of mouse whole ovaries

Ovarian tissue cryopreservation is considered to be the only means to preserve fertility for prepubertal girls and women whose cancer treatment cannot be postponed. However, ovarian tissues are inevitably damaged by oxidative stress during cryopreservation, which threatens follicle survival and development, and thus affects female fertility. Therefore, reducing tissue oxidative stress injury is one of the major challenges to achieving efficient cryopreservation of ovarian tissues, especially for whole ovaries. Here, we proposed a new method to improve the antioxidant capacity of whole ovaries during cryopreservation, static magnetic field assisted thawing. The results demonstrated that the antioxidant capacity of the ovarian tissue was significantly improved by static magnetic field treatment. In addition, ovarian tissue allograft transplantation was carried out, which successfully achieved vascular regeneration and maintained follicular development. The findings of this study not only provide a new reference for the preservation of female fertility, but also is a major step forward in the cryopreservation of tissues and organs. It will have good application prospects in the field of assisted reproduction and cryo-biomedicine.

A Vascular Thrombus Therapy Method Based on Magnetic-Induced Vibration

A vascular thrombus therapy method based on magnetic-induced vibration is presented. It is a mechanicalway of removing vascular thrombus that adopts the combined use of two concepts, namely (i) magnetic-induced vibration of magnetostrictive materials and (ii) changes in physical form of thrombus under high-frequency impact and vibration. This method has many advantages that (i) eliminate the side effects of drug treatment, (ii) reduce the complexity of traditional mechanical method, and (iii) improve the reliability of treatment. Practical results obtained from the simulations and experiments are included. They verify the proposed system and indicate that this method can effectively treat vascular thrombus and reduce patient's suffering and costs. Bioelectromagnetics. 2019;40:391-401. © 2019 Bioelectromagnetics Society.