OBJECTIVE: Chronic Helicobacter pylori (H. pylori) infection promotes non-cardia gastric cancer. Some mouse models suggest that bone marrow derived cells (BMDC) contribute to Helicobacter-associated gastric carcinogenesis. We determined whether this increased susceptibility to Helicobacter-induced gastric carcinogenesis of p27-deficient mice is dependent upon their p27-null BMDC or their p27-null gastric epithelial cells. DESIGN: Female mice (recipients) were irradiated and transplanted with BMDC from male donors. Wild type (WT) mice in group 1 (control) received BMDC from male GFP-transgenic mice. Female WT and p27 KO mice were engrafted with male p27KO mice BMDC (Group 2) or GFP-transgenic WT BMDC (Group 3). Recipients were infected with H. pylori SS1 for one year. RESULTS: Mice lacking p27 in either the BM pool or gastric epithelium developed significantly more advanced gastric pathology, including high-grade dysplasia. Co-staining of donor BMDC in dysplastic gastric glands was confirmed by immunofluorescence. Gastric expression of IL-1 beta protein was reduced in groups 2 and 3 (p < 0.05 vs control) whereas expression of IFN-gamma and chemokines MIP-1 beta, MIG, IP-10 and RANTES in group 2 were significantly higher than group 3. CONCLUSIONS: Both bone marrow-derived and gastric epithelial cells contribute to the increased gastric cancer susceptibility of p27-deficient H. pylori-infected mice.

Purpose: To understand the process of discovery and decision-making for adults with the CDH1 marker for hereditary diffuse gastric cancer (HDGC) and inherited breast cancer. Participants and Setting: Purposeful sampling included 20 participants; 17 adults (11 women and 6 men, ages 23–77) recruited through the No Stomach for Cancer organization; six participants were interviewed two times; with three healthcare providers also interviewed. Nineteen interviews were by telephone; one was in person. Methodological Approach: Grounded theory with constant comparison. Findings: The person diagnosed with the genetic marker CDH1 undergoes the decision-making process of Paving the way as they address this healthcare challenge. Paving the way explains the entry points for learning the risk, discerning testing for confirmation, choosing iterative individual cycles of surveillance, surgery, and ongoing adjustments postoperatively while normalizing to live longer. Implications for Nursing: Understanding the process of Paving the way explains and describes the nine key factors for decision-making and predicts the timing for nursing interventions for both post-genetic testing and pre- and postoperative assessment and planning. Knowledge Translation: Advocacy for the self and family is key to Paving the Way. Nursing has an opportunity to develop and expand the roles for navigator and counselor in the area of genetic testing. Patients undergoing PTG have chronic healthcare needs. Family implications for genetic testing require assessment beyond the individual.