Publications

The Minority Training Program in Cancer Control Research (MTPCCR) encourages underrepresented master's level students and professionals in the social, behavioral, and public health sciences to pursue doctoral training and careers in cancer disparities research. This paper reports new data on the program outcome after 12 years. A web-based survey was sent to all 462 program alumni. The questions addressed current academic status and plans, job status and plans, research focus, and influence of the MTPCCR. The survey response rate was 79 %. Overall, 30 % of alumni are enrolled in or have completed doctoral programs; 88 % of whom report involvement in research related to cancer. Scaled and open-ended responses indicate a strong influence of the program on doctoral program enrollment and cancer focus. The MTPCCR model is successful because it targets underrepresented minorities who are capable of doctoral studies but have not yet chosen that path.

The alveolar epithelium of the lung constitutes a unique interface with the outside environment. This thin barrier must maintain a surface for gas transfer while being continuously exposed to potentially hazardous environmental stimuli. Small differences in alveolar epithelial barrier properties could therefore have a large impact on disease susceptibility or outcome. Moreover, recent work has focused attention on the alveolar epithelium as central to several lung diseases, including acute lung injury and idiopathic pulmonary fibrosis. Although relatively little is known about the function and regulation of claudin tight junction proteins in the lung, new evidence suggests that environmental stimuli can influence claudin expression and alveolar barrier function in human disease. This review considers recent advances in the understanding of the role of claudins in the breakdown of the alveolar epithelial barrier in disease and in epithelial repair.

BACKGROUND

Obesity contributes to respiratory symptoms and exercise limitation, but the relationships between obesity, airflow obstruction (AO), respiratory symptoms and functional limitation are complex.

AIMS

To determine the relationship of obesity with airflow obstruction (AO) and respiratory symptoms in adults without a previous diagnosis of chronic obstructive pulmonary disease (COPD).

METHODS

We analysed data for potential referents recruited to be healthy controls for an ongoing study of COPD. The potential referents had no prior diagnosis of COPD or healthcare utilisation attributed to COPD in the 12 months prior to recruitment. Subjects completed a structured interview and a clinical assessment including body mass index, spirometry, six-minute walk test (SMWT), and the Short Performance Physical Battery (SPPB). Multiple regression analyses were used to test the associations of obesity (body mass index >30 kg/m2) and smoking with AO (forced expiratory volume in 1s/forced vital capacity ratio <0.7). We also tested the association of obesity with respiratory symptoms and impaired functional capacity (SPPB, SMWT), adjusting for AO.

RESULTS

Of 371 subjects (aged 40-65 years), 69 (19%) had AO. In multivariate analysis, smoking was positively associated with AO (per 10 pack-years, OR 1.24; 95% CI 1.04 to 1.49) while obesity was negatively associated with AO (OR 0.54; 95% CI 0.30 to 0.98). Obesity was associated with increased odds of reporting dyspnoea on exertion (OR 3.6; 95% CI 2.0 to 6.4), productive cough (OR 2.5; 95% CI 1.1 to 6.0), and with decrements in SMWT distance (67 ± 9 m; 95% CI 50 to 84 m) and SPPB score (OR 1.9; 95% CI 1.1 to 3.5). None of these outcomes was associated with AO.

CONCLUSIONS

Although AO and obesity are both common among adults without an established COPD diagnosis, obesity (but not AO) is linked to a higher risk of reporting dyspnoea on exertion, productive cough, and poorer functional capacity.