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Clinical Chemistry 35: 2165-2168, 1989;
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Clinical Chemistry, Vol 35, 2165-2168, Copyright © 1989 by American Association for Clinical Chemistry

Molecular genetics and the transformation of clinical chemistry

R Williamson
Department of Molecular Genetics, St. Mary's Hospital Medical School, Imperial College London, England.

Clinical chemistry is going through an identity crisis, squeezed between automation (de-skilling) on the service side and molecular genetics in research. Automated routine estimations are now carried out and interpreted by machines; the skilled staff members required are more likely to have degrees in electronics than medicine or biochemistry. The role of molecular genetics is more ambiguous; it is inherently reductionist, in that it attempts to explain most clinical phenomena in terms of DNA sequence alone. This has been remarkably successful for single-gene defects (such as those causing Duchenne muscular dystrophy, hemoglobinopathies, cystic fibrosis, and ataxias) and may well prove equally so for Alzheimer's disease, cancer, heart disease, and schizophrenia. DNA diagnosis is not yet routine, but because of technical advances such as gene amplification ("PCR") and high-sensitivity gene-detection assays, it may soon become so, not only in major centers but also in local pathology laboratories and general practice. Clinical chemists must decide whether they wish to respond to this new and stimulating challenge by retooling and retraining. Should anyone be permitted into clinical chemistry during the 1990s without knowledge of both electronics and molecular genetics? Will there be a clinical chemistry in the twenty-first century other than through molecular genetics? This article is a personal response to these questions.


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Copyright © 1989 by the American Association for Clinical Chemistry.