From The New England Journal of Medicine
There is a long history of studies of homeotic transformation in drosophila, dating back to the isolation of the bithorax gene mutation by Calvin Bridges in 1915. Gehring started his laboratory in the late 1970s, when molecular genetics was coming into vogue and the new techniques of this field could be applied to understanding transformation. His contributions are many, including the discovery of the antennapedia homeobox gene and an understanding of the structure of homeoproteins. He also created a tractable genetic system using the fly, developing some of the important tricks of the trade: heat-shock promoters, enhancer traps, and lacZ cell-lineage analysis. More recently, he discovered similarities between the mammalian homeoprotein PAX6 and the drosophila eyeless gene, demonstrating a similar evolution of eyes among divergent invertebrate and vertebrate species. The chronicle of these discoveries as they occurred during the 1980s and early 1990s was extremely interesting for those of us who had read Gehring's papers. Gehring is also gracious and credits others for their contributions to the field.
A unique and delightful aspect of this book deals with Walter Gehring's mind. He is clearly an exceptionally smart person, driven by an intense intrinsic curiosity about biology. Yet he describes the humanistic features of scientific inquisitiveness: examining why things fly, tracking the migration of birds by radar, and even looking at the toes of a person sitting next to him in an airplane, trying to evaluate whether they have a homeotic transformation.
The relationship between students and mentors is another theme of this book. Gehring takes us through his development as a student of Ernst Hadorn and relates his appreciation of his mentor. This experience clearly influences Gehring's dealings with his own postdoctoral fellows and graduate students. Gehring presents difficult but informative experiments to those in his laboratory, and despite the many reasons for potential failure, his premonitions are borne out with successful experiments. He tells a story of the way in which luck can enter into science: the discovery of the eyeless gene began as a band on a gel used as a control for another experiment.
This book is a testament to the will of Gehring, who was so fascinated by biology that he developed the molecular genetics of the drosophila system to further our understanding of embryogenesis, patterning, and disease. Through this book on homeotic transformation, he has transformed our thoughts regarding the process of discovery. Gehring has a fascination with the press and muses about the crazy titles of newspaper articles describing his work. When the eyeless gene was found to induce eyes in locations where eyes do not normally form, The New York Times published a front-page article entitled, "With New Fly, Science Outdoes Hollywood." With this book, I believe that Gehring has earned the title, "Master of the Master Control Genes."
Reviewed by Leonard Zon, M.D.
Copyright © 1999 Massachusetts Medical Society. All rights reserved. The New England Journal of Medicine is a registered trademark of the MMS.