Lights, Facts, and Goals: A Novel Framework to Enhance Community Health Messaging Campaign Design, Implementation, and Assessment.

The spread of health misinformation has made the task of health communicators more difficult. However, the success of health messaging hinges not only on meaningful message content but also on the credibility of who is delivering the message. "Trusted messengers," like local leaders and community-based organizations, have a greater ability to influence improvements in community health, due to their shared cultural experience with their communities. Health communication agencies should empower trusted messengers with the tools they need to succeed in health communication. One tool critical for their success is a succinct health messaging framework to plan and implement health messaging. Marketing has "See, Think, Do"-a simple, practical framework used to influence consumer purchases. As a more trustworthy corollary, we propose the "Lights, Facts, and Goals" framework, a concise, authentic, and transparent method for planning, implementing, and assessing health messaging campaigns that influence health improvements. "Lights" refers to different methods of reaching communities like trusted messengers, advertisements, and text messages. "Facts" refers to key sourced scientific information relevant to a specific aspect of community health. "Goals" refers to actions community members can take to improve their health in connection with the communicated health facts. This article describes how the "Lights, Facts, and Goals" framework both simplifies the creation and communication of scientifically sound health messaging and strengthens the partnership between health agencies and trusted messengers in the community. Through "Lights, Facts, and Goals," community-based organizations, community leaders, and their partners will be more effective at improving community health through messaging.

Nanocomposite liposomes for pH-controlled porphyrin release into human prostate cancer cells.

It is both challenging and desirable to have drug sensitizers released at acidic tumor pH for photodynamic therapy in cancer treatment. A pH-responsive carrier was prepared, in which fumed silica-attached 5,10,15,20-tetrakis(4-trimethylammoniophenyl)porphyrin (TTMAPP) was encapsulated into 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) nanocomposite liposomes. The sizes of agglomerates were determined by dynamic light scattering to be 115 nm for silica and 295 nm for silica-TTMAPP-DOPC liposomes. Morphological changes were also found in TEM images, showing liposome formation at pH 8.5 but collapse upon silanol protonation. TTMAPP release is enhanced from 13% at pH 7.5 to 80% at pH 2.3, as determined spectrophotometrically through dialysis membranes. Fluorescence emission of TTMAPP encapsulated in the dry film of liposomes was reduced to half at pH 8.6 when compared to that at pH 5.4, while the production of singlet oxygen was quintupled at pH 5.0 compared to pH 7.6. Upon treatment of human prostate cancer cells with liposomes containing 6.7 µM, 13 µM, 17 µM and 20 µM TTMAPP, the cell viabilities were determined to be 60%, 18%, 20% and 5% at pH 5.4; 58%, 30%, 25% and 10% at pH 6.3; and 90%, 82%, 68% and 35% at pH 7.4, respectively. Light-induced apoptosis in cancerous cells was only observed in the presence of liposomes at pH 6.3 and pH 5.4 but not at pH 7.4, as indicated by chromatin condensation.