Impact of DPP4 Inhibition on Survival in Patients With Metastatic Renal Cell Carcinoma and Type 2 Diabetes Mellitus.

BACKGROUND: Dipeptidyl peptidase IV (DPP4) is a cell surface receptor that possesses numerous substrates implicated in tumor growth and metastasis. Prior studies have suggested an association between DPP4 inhibition and increased progression-free survival (PFS) and overall survival (OS) in colorectal and lung cancers but no benefit in breast or pancreatic cancers. However, no studies to date have explored the impact of DPP4 inhibitors (DPP4i) in patients with metastatic renal cell carcinoma (mRCC). In this study we present a first-time analysis examining the impact of DPP4i use on PFS and OS in patients with mRCC and type 2 diabetes mellitus. METHODS: We performed a retrospective analysis of patients with diabetes and mRCC at the University of Virginia. The study group comprised those whose diabetic regimen included a DPP4i during mRCC treatment. The control group comprised patients whose diabetic regimen did not include a DPP4i during treatment. Cox regression analysis was utilized to determine the hazard ratios of progression and death between groups. RESULTS: Fifty-nine patients were eligible for the study, with 11 in the DPP4i group and 48 in the control group. Cancer progression occurred in 81.8% of patients in the DPP4i group and 66.7% in the control group. No statistically significant differences on PFS (HR: 1.60 [95% CI, 0.75-3.43]) or OS (HR: 0.69 [95% CI, 0.28-1.70]) were found between groups. CONCLUSIONS: This retrospective study explored the effect of DPP4i on outcomes in patients with mRCC and diabetes. DPP4i have been shown to have favorable effects on PFS and OS in some cancers but not in others. The results of this study suggest that DPP4i do not confer clinical benefit in patients with mRCC. Larger studies are warranted to better elucidate the effect of DPP4i in mRCC and the mechanisms underlying differential tumor response to these agents in different malignancies.

Sjogren syndrome presenting as atrioventricular block in an adult.

A woman in her late teens with a history of Juvenile idiopathic arthritis (JIA) and ongoing sicca symptoms presented with syncope. Upon admission, she was found to be bradycardic with a second-degree atrioventricular (AV) block. After infectious, structural and metabolic aetiologies had been ruled out, she was worked up for rheumatologic causes.Our patient had elevated titres of anti-Sjogren syndrome (SS) antibodies anti-Ro antibodies and was diagnosed with AV block secondary to SS. She was treated with a permanent pacemaker. Patient was followed up in clinic where she denied further syncopal episodes and was started on secretagogues for sicca symptoms.

Outcome expectancies toward adherence to antiretroviral therapy for pregnant and postpartum women with HIV.

OBJECTIVES: Adherence to antiretroviral therapy and retention in care significantly drop for women with HIV during the postpartum period. We have a limited understanding of how outcome expectancies influence maternal adherence and retention in care. METHODS: Women with HIV from an urban academic clinic completed in-depth interviews in the third trimester and at 3 to 9 months postpartum to evaluate outcome expectancies, facilitators, and barriers to antiretroviral therapy adherence and retention in care. Interviews were audio-recorded and analyzed for content. A codebook was created using deductive (based on the theory of reasoned action approach) and inductive (based on emergent themes) codes. RESULTS: We conducted 21 interviews with 12 women during pregnancy and 9 women during postpartum period. Participants had a mean age of 31 (standard deviation = 5.7) and most were African American (75%). Outcome expectancies centered mostly around pediatric health to prevent perinatal transmission of HIV and to be healthy to raise their children. Other outcome expectancies included preventing transmission of HIV to their partners. Social support from partners served as a strong facilitator as they helped routinize pill-taking behaviors, provided reminders, and decreased social isolation. Barriers to antiretroviral therapy adherence included depression, the disruption of scheduling routines, and the physical demands associated with the postpartum period. These barriers were accentuated for women with multiple children. CONCLUSION: Women's commitment to pediatric health was the primary motive for antiretroviral therapy adherence. Partners also served an important role. These findings suggest that interventions linking pediatric and maternal health, and partner support can improve maternal HIV treatment in the postpartum period.