Ute Deichmann

The concepts of hierarchical organization, genetic determinism and biological specificity have played a crucial role in biology as a modern experimental science since its beginnings in the nineteenth century. The idea of genetic information and genetic determination was at the basis of molecular biology that developed in the 1940s with macromolecules, viruses and prokaryotes as major objects of research often labelled “reductionist”. However, the concepts have been marginalized or rejected in some of the research that in the late 1960s began to focus additionally on the molecularization of complex biological structures and functions using systems approaches. This paper challenges the view that ‘molecular reductionism’ has been successfully replaced by holism and a focus on the collective behaviour of cellular entities. It argues instead that there are more fertile replacements for molecular ‘reductionism’, in which genomics, embryology, biochemistry, and computer science intertwine and result in research that is as exact and causally predictive as earlier molecular biology.

Eric Davidson, a passionate molecular developmental biologist and intellectual, believed that conceptual advances in the sciences should be based on knowledge of conceptual history. Convinced of the superiority of a causal-analytical approach over other methods, he succeeded in successfully applying this approach to the complex feature of organismal development by introducing the far-reaching concept of developmental Gene Regulatory Networks. This essay reviews Davidson’s philosophy, his support for the history of science, and some aspects of his scientific personality.

The concepts of hierarchical organization, genetic determinism and biological specificity have played a crucial role in biology as a modern experimental science since its beginnings in the nineteenth century. The idea of genetic information and genetic determination was at the basis of molecular biology that developed in the 1940s with macromolecules, viruses and prokaryotes as major objects of research often labelled “reductionist”. However, the concepts have been marginalized or rejected in some of the research that in the late 1960s began to focus additionally on the molecularization of complex biological structures and functions using systems approaches. This paper challenges the view that ‘molecular reductionism’ has been successfully replaced by holism and a focus on the collective behaviour of cellular entities. It argues instead that there are more fertile replacements for molecular ‘reductionism’, in which genomics, embryology, biochemistry, and computer science intertwine and result in research that is as exact and causally predictive as earlier molecular biology.

Between November 30th and December 2nd, 2015, the Jacques Loeb Centre for the History and Philosophy of the Life Sciences at Ben-Gurion University of the Negev in Beer Sheva held its Eighth International Workshop under the title “From Genome to Gene: Causality, Synthesis and Evolution”. Eric Davidson, the founder of the concept of developmental Gene Regulatory Networks, had regularly attended the previous meetings, and his participation in this one was expected, but he suddenly passed away 3 months before. In this paper, we provide an introduction and overview on five papers that were presented at the workshop and examine the importance of genomes and gene regulatory networks in extant biology, developmental biology, evolutionary biology and medicine, as well as a collection of remembrances of Eric Davidson, of his personality as well as of his scientific contributions. Historical perspectives are provided, and the ethical issues raised by the new tools developed to modify the genome are also discussed.

Inheritance and variation were a major focus of Charles Darwin’s studies. Small inherited variations were at the core of his theory of organic evolution by means of natural selection. He put forward a developmental theory of heredity (pangenesis) based on the assumption of the existence of material hereditary particles. However, unlike his proposition of natural selection as a new mechanism for evolutionary change, Darwin’s highly speculative and contradictory hypotheses on heredity were unfruitful for further research. They attempted to explain many complex biological phenomena at the same time, disregarded the then modern developments in cell theory, and were, moreover, faithful to the widespread conceptions of blending and so-called Lamarckian inheritance. In contrast, Mendel’s approaches, despite the fact that features of his ideas were later not found to be tenable, proved successful as the basis for the development of modern genetics. Mendel took the study of the transmission of traits and its causes (genetics) out of natural history; by reducing complexity to simple particulate models, he transformed it into a scientific field of research. His scientific approach and concept of discrete elements (which later gave rise to the notion of discrete genes) also contributed crucially to the explanation of the existence of stable variations as the basis for natural selection.

Eukaryotic genomes are packaged into a nucleoprotein complex known as chromatin. The term was introduced in 1879 by German cytologist Walther Flemming. While observing the processes of mitosis in a light microscope, Flemming coined the term to describe the easily stainable threads in the nucleus. He predicted that it would not have a long life: “The word chromatin may serve until its chemical nature is known, and meanwhile stands for that substance in the cell nucleus which is readily stained”. However, Flemming’s prediction did not come true. Although the chemical nature of chromatin—a complex of nucleic acid and proteins—was already elucidated at the end of the 19th century, the..

We dedicate this special section to the memory of Eric H. Davidson, who died on the first of September 2015. Though he had been seriously ill for many years, his death was unexpected and a great shock for us.We dedicate the section, first, to a great scientist who passionately pursued the idea of a mechanistic explanation of development and evolution. Eric was a pioneer in the molecular biology of development and its relationship to evolution. One of the first to suggest a model for gene regulation in higher organisms, he became the founder of the enormously successful concept of developmental gene regulatory networks. Central to his approach was the analysis of the characteristics of..

Reliabilist philosophy of science considers scientific misconduct a transgression against the principles of good cognitive practice. Good practice in research is characterised by the reliability, efficiency and fertility of the cognitive processes involved. The reliabilist approach is closely connected to the idea of mutual cognitive dependency of the research community. Trust in the testimony of others is not an inevitable but a favouring factor of scientific progress — and misconduct damages the testimonial chain, respectively the principle of trustworthiness. Within the reliabilist framework, the main focus on questionable research is not on whether or not there are fraudulent intentions , but on recognisable consequences for the research community. Criticising the constructivist modeling of questionable research, we reconstruct certain contributions by Emil Abderhalden, Richard Goldschmidt, Franz Moewus, and Ernst Waldschmitz-Leitz as serious misconducts respectively frauds. We also show that specific social factors — often regarded as “apologising” conditions — decisively interfere with the principle of trustworthiness in the scientific community

A recent cover of the German news magazine Der Spiegel announced: “Victory over Genes. Smarter, healthier, happier: How we can outwit our genome” (2010). The magazine’s article, instead, emphasizes the importance of epigenetics. According to Florian Maderspacher (2010), who reprinted the cover in his editorial in Current Biology, the relief or “schadenfreude” about the apparent victory over genes—which the cover, the article, and commentaries to it reveal—is, in part, a German phenomenon. It echoes “a latent anti-scientific attitude in parts of the German public,” which for historic reasons is particularly strong with regard to genetics: “After all, the idea that people’s properties—good or bad—are determined by ..

In this second decade of the 21st century, we find the pervasive influence of synthetic biology everywhere, not only in research laboratories, but also in the discourses of politicians and ethicists. Despite its ubiquity, the precise meaning of the notions of "synthetic biology" and "synthetic life," as well as their history, potential, and risks, remain obscure not only to the layperson, but also to most biologists.The aim of this special issue is twofold. First, it is intended to help the reader better appreciate what synthetic biology is all about and what are its roots. Second, once the overall picture has been expounded and made clearer, the questions of whether research in synthetic biology raises new and ..

Chemistry and biochemistry in Germany was notably affected by the dismissal and emigration of Jewish scientists. The expulsion of Jewish scientists aided to significantly reduce the international regard for German science, particularly in biochemistry, physical chemistry, and quantum chemistry, after 1945. In most cases remaining scientists adjusted quickly after 1933 to the new political circumstances, with a few exceptions. A number of them even actively supported the politics of National Socialism. This fact as well as the common stance to forget the 12 years of National Socialist rule complicated the exchange of international scientific knowledge after 1945 and delayed affiliation of the weakened fields of research to the level of international research.

Methods and equations for analysing the kinetics of enzyme-catalysed reactions were developed at the beginning of the 20th century in two centres in particular; in Paris, by Victor Henri, and, in Berlin, by Leonor Michaelis and Maud Menten. Henri made a detailed analysis of the work in this area that had preceded him, and arrived at a correct equation for the initial rate of reaction. However, his approach was open to the important objection that he took no account of the hydrogen-ion concentration (a subject largely undeveloped in his time). In addition, although he wrote down an expression for the initial rate of reaction and described the hyperbolic form of its dependence on the substrate concentration, he did not appreciate the great advantages that would come from analysis in terms of initial rates rather than time courses. Michaelis and Menten not only placed Henri's analysis on a firm experimental foundation, but also defined the experimental protocol that remains standard today. Here, we review this development, and discuss other scientific contributions of these individuals. The three parts have different authors, as indicated, and do not necessarily agree on all details, in particular about the relative importance of the contributions of Michaelis and Menten on the one hand and of Henri on the other. Rather than force the review into an unrealistic consensus, we consider it appropriate to leave the disagreements visible.