The recently identified CD28 homolog and costimulatory molecule programmed death-1 (PD-1) and its ligands, PD-L1 and PD-L2, which are homologs of B7, constitute an inhibitory regulatory pathway of potential therapeutic use in immune-mediated diseases. We examined the expression and functions of PD-1 and its ligands in experimental cardiac allograft rejection. In initial studies, we found that most normal tissues and cardiac isografts had minimal expression of PD-1, PD-L1, or PD-L2, but intragraft induction of all three molecules occurred during development of cardiac allograft rejection. Intragraft expression of all three genes was maintained despite therapy with cyclosporin A or rapamycin, but was prevented in the early posttransplant period by costimulation blockade using CD154 or anti-inducible costimulator mAb. We prepared PD-L1.Ig and PD-L2.Ig fusion proteins and showed that each bound to activated PD-1+ T cells and inhibited T cell functions in vitro, thereby allowing us to test the effects of PD-1 targeting on allograft survival in vivo. Neither agent alone modulated allograft rejection in wild-type recipients. However, use of PD-L1.Ig administration in CD28−/− recipients, or in conjunction with immunosuppression in fully MHC-disparate combinations, markedly prolonged cardiac allograft survival, in some cases causing permanent engraftment, and was accompanied by reduced intragraft expression of IFN-γ and IFN-γ-induced chemokines. PD-L1.Ig use also prevented development of transplant arteriosclerosis post-CD154 mAb therapy. These data show that when combined with limited immunosuppression, or in the context of submaximal TCR or costimulatory signals, targeting of PD-1 can block allograft rejection and modulate T and B cell-dependent pathologic immune responses in vivo.

We established a swine PVR model that recapitulates key clinical features found in humans and, thus, can be used to study the pathophysiology of PVR, as well as new novel therapies. GFP+ RPE cells injected into the vitreous cavity formed contractile membranes on the inner retinal surface and caused localized traction retinal detachments.

The rapid increase in gene-disease discoveries offers real promise of clinical applications for people and families affected by genetic conditions but for which health professionals are not prepared because of lack of training. The availability of clinically relevant education resources is critical to enabling nurses to develop the appropriate genetics-genomics knowledge and skills to provide optimum care for individuals and families. The Internet is a core resource to support teaching and learning in nurse education. Evaluating such resources is important to maximise the education experience, particularly for subjects traditionally perceived by nurses as being difficult. Telling Stories, Understanding Real Life Genetics is a web-based educational resource. It uses real accounts from individuals and professionals to promote understanding of the impact of genetics-genomics on the lives of people and their families. Google Analytics™ Web analytics service provides time series data for analysing web usage to optimise website effectiveness. We present data of visitor activity and behaviour from 123 countries over three years from 2009–2011 and consider how the application of the web analytics informs approaches to enhancing visibility of the website, provides an indicator of engagement with genetics-genomics both nationally and globally, and informs future expansion of the site as a global resource for health professional education. Telling Stories is an accessible, broad-reaching resource that is of global relevance for health professionals, attracting over 33,500 visitors between 2009–2011, with steadily increasing numbers of returning visitors. The United Kingdom, United States, Canada and the Netherlands are the largest site users. Returning visitors spend significantly more time on site and view more pages than new visitors. Most referring sites are education establishments. More needs to be done now to enhance the site’s accessibility for people of other languages and cultures.

Objective: This study aimed to explore some factors influencing perceptions of human gene therapy. Method: A small qualitative study using two semi-structured interviews per participant (n = 22). The groups comprised (1) people with cystic fibrosis and members of their family (n = 9), and (2) students from a science evening class as well as lay members of the public selected from the practice list of a local general practitioner (n = 13). Results: This pilot study demonstrates support for somatic gene therapy and ambivalence about germline gene therapy. A clear distinction is drawn between therapy and enhancement, with the majority opposing gene enhancement. Conclusions: Attitudes towards the acceptability of gene therapy are not necessarily determined by experience of, or exposure to, a genetic condition. More research is needed with the general public to determine what is perceived to be acceptable public policy in this field.