Human gene transfer research has been under way for nearly 10 years, with f
ew clinically significant results to date; yet public and professional expe
ctations still run high, Exaggerated expectations and misconceptions about
gene transfer research are attributable in part to the terminology used to
describe this research, which is misleading but, in the absence of more pre
cise language, is commonly used, In particular, use of the term "gene thera
py" to describe gene transfer research and use of the term "patient" in pla
ce of "subject" tend to cause both professionals and the public to confuse
research with proven effective treatment. Investigators preparing to engage
in human gene transfer research must use the NIH guidance document, "The P
oints to Consider in the Design and Submission of Protocols for the Transfe
r of Recombinant DNA Molecules into the Genome of One or More Human Subject
s," written by the Recombinant DNA Advisory Committee, to prepare for the s
ubmission of a research protocol. Several corrections in the terminology em
ployed by this guidance document could help to avoid misconceptions about g
ene transfer research and clarify both the promise and the limits of the re
search enterprise for investigators and subjects.