First Do No Harm: Ethical Concerns of Health Researchers That Discourage the Sharing of Results With Research Participants

Background: Health researchers and health research participants support the sharing of research results; however, results are typically only shared through peer-reviewed publications. Few studies have investigated researchers' ethical concerns related to sharing results with research participants. Methods: An explanatory approach was used to explore the ethical concerns researchers may have with returning aggregate results to research participants. Researchers (N = 414) responded to an online survey of open-ended questions that allowed researchers to provide in-depth explanations regarding their responses to closed-ended questions. Results: Across researchers, the mean percentage of studies for which ethical concerns were reported as a barrier to results sharing was 38.5% (SD= 30.7). Researchers' primary ethical concerns with returning results were articulated as an overarching desire to prevent harm to participants. Three broad ethical concerns emerged, each with underlying subthemes: 1) distress, 2) understanding, and 3) privacy. Conclusions: This is the first study to broadly explore researchers' ethical concerns with sharing aggregate research results with participants and reveals that researchers' ethical concerns are closely tied to the ethical obligation to do no harm. In order to increase results sharing, steps must be taken to help researchers understand how to minimize potential harm when sharing results.

Enrichment of human heterokaryons by Ficoll gradient for complementation analysis of iduronate sulfatase deficiency

Ficoll gradients have been used to enrich for heterokaryons in cultures of human skin fibroblasts following polyethylene glycol (PEG) induced fusion. These gradients provide a simple and consistent method for obtaining populations of multinucleated cells, at least twofold greater than those resulting from fusion alone. Formation of glucose-6-phosphate dehydrogenase (G6PD) heteropolymers has been used as a functional assay for the presence of heterokaryons. Analysis of cell populations enriched for multinucleated cells has revealed complementation leading to iduronate sulfatase activity in heterokaryons derived from iduronate sulfatase-deficient fibroblasts expressing the Hunter and multiple sulfatase-deficiency mutations.

Human and mouse hypoxanthine-guanine phosphoribosyltransferase: dimers and tetramers

Human and mouse hypoxanthine-guanine phosphoribosyltransferase subunits combine to form an active heteropolymer. Dimers form the basic subunit structure of the enzymes, yet the dimers can readily associate to form tetramers. The equilibrium between dimers and tetramers is significantly influenced by the ionic strength of the enzyme solvent.