Periodontal disease is not associated with risk of inflammatory bowel disease: Results from two prospective cohort studies in the US.

AIM: To examine the relationship between periodontal disease and tooth loss and risk of inflammatory bowel disease (IBD). METHODS: We conducted a prospective cohort study of 86,602 women from the Nurses' Health Study (1992-2016) and 50,349 men from the Health Professionals Follow-up Study (1986-2016) with available data on periodontal disease and tooth loss. Cases of IBD were initially reported by participants and then confirmed by medical record review. We used Cox proportional hazards modelling to estimate multivariable-adjusted hazard ratios (aHRs) and 95% CIs. RESULTS: Through the end of follow-up, we documented 175 cases of Crohn's disease (CD) and 209 cases of ulcerative colitis (UC). After adjustment for potential risk factors, there was no association between periodontal disease and risk of CD (pooled aHR: 0.99, 95% CI: 0.65-1.52, p = 0.970) or UC (aHR: 0.99, 95% CI: 0.68-1.45, p = 0.971). Similarly, we did not observe an association between tooth loss and risk of CD (aHR: 0.72, 95% CI: 0.43-1.21, p = 0.218) or UC (aHR: 0.89, 95% CI: 0.58-1.36, p = 0.581) in the pooled analysis. The associations were not modified by sex, age, body mass index (BMI), smoking status or NSAID use (all pinteraction > 0.87). CONCLUSION: In two large prospective cohort studies, we did not observe an association between periodontal disease and tooth loss and risk of CD or UC.

DRAK2 contributes to type 1 diabetes by negatively regulating IL-2 sensitivity to alter regulatory T cell development.

Drak2-deficient (Drak2-/-) mice are resistant to multiple models of autoimmunity yet effectively eliminate pathogens and tumors. Thus, DRAK2 represents a potential target to treat autoimmune diseases. However, the mechanisms by which DRAK2 contributes to autoimmunity, particularly type 1 diabetes (T1D), remain unresolved. Here, we demonstrate that resistance to T1D in non-obese diabetic (NOD) mice is due to the absence of Drak2 in T cells and requires the presence of regulatory T cells (Tregs). Contrary to previous hypotheses, we show that DRAK2 does not limit TCR signaling. Rather, DRAK2 regulates IL-2 signaling by inhibiting STAT5A phosphorylation. We further demonstrate that enhanced sensitivity to IL-2 in the absence of Drak2 augments thymic Treg development. Overall, our data indicate that DRAK2 contributes to autoimmunity in multiple ways by regulating thymic Treg development and by impacting the sensitivity of conventional T cells to Treg-mediated suppression.

Perspectives on a Home Telehealth Care Management Program for Veterans With Posttraumatic Stress Disorder Who Smoke.

BACKGROUND: Individuals with posttraumatic stress disorder (PTSD) have high rates of smoking and low quit rates. We conducted a qualitative evaluation of an integrated smoking cessation randomized controlled trial (RCT) that used home telehealth and motivational interviewing (MI) to change smoking behaviors among individuals with PTSD. METHOD: Using a convenience sample sourced from the original RCT, intervention and control group participants were invited to participate in a qualitative evaluation. Semistructured interview guides were used to assess the effectiveness of study components, make recommendations for future interventions, and identify facilitators/barriers to smoking cessation. We analyzed these data using an inductive and deductive, team-based content analysis approach. RESULTS: We interviewed 32 study participants (intervention: n = 15, control: n = 17) who completed the original RCT within the previous 6 months. Respondents were highly satisfied with home telehealth and MI counseling. The intervention group respondents found MI counseling to be supportive, nonjudgmental, and informative. Control group respondents felt that they had received smoking cessation assistance. Respondents from both groups desired more information about PTSD and smoking, relied on smoking as a coping mechanism for PTSD, and believed that quitting was an individual choice. CONCLUSION: Respondents reported that home telehealth and MI were acceptable ways to provide smoking cessation assistance to individuals with PTSD. The support and increased awareness of smoking behaviors were perceived as helpful. Future investigations should focus on increasing support and information about stress management, smoking, PTSD, and the relationship between them for individuals with PTSD who smoke.