Dr. Raymond W. M. Kwong gave a presentation during his visit to IHB, June 6, 2014.

On June 6th, Prof. Steve F. Perry, Fellow of the Royal Society of Canada and dean of the Faculty of Science of University of Ottawa, and his post-doc, Raymond W. M. Kwong, paid a visit to Institute of Hydrobiology, Chinese Academy of Sciences (IHB). Dr. Raymond W. M. Kwong was invited to give a presentation with the title of “An essential role for parathyroid hormone in branchial ach development and differentiation of ion-transporting cells in larval zebrafish”. 

In his presentation, Dr. Raymond W. M. Kwong put forward that zebrafish is a very good model for studying the adaptive mechanisms of freshwater fish to acid exposure, and the mechanisms regulating ionic and acid–base balance during acid exposure in zebrafish. They found that the Ca²⁺ uptake was increased after acid exposure in zebrafish larval, which is due to the increasing expression of gcm2 gene. Knocking down the expression of gcm2 can compensate for this effect. Meanwhile, the branchial ach development of parathyroid hormone I (PTH-1) knocking down zebrafish was abnormal, and this kind of abnormal was caused by Ca²⁺ loss. Therefore, parathyroid hormone plays an important role in early branchial arch development and the proliferation of ion transporting cells. 

Prof. Steve F. Perry now is the dean of Faculty of Science at University of Ottawa, his main research fields include: 1) The role of stress hormones in controlling cardio respiratory function and blood gas transport in fish during environmental disturbances. 2) The physiological and molecular nature of gill and renal transepithelial ion movements and their modulation during environmental and acid-base disturbances, etc.