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Aims: To compare obstetric and neonatal outcomes in patients with type 2 diabetes mellitus (T2DM) who had scheduled delivery at full term (≥ 39 0/7 weeks) compared to early term (37 0/7 – 38 6/7 weeks) for T2DM indications. Methods: This was a retrospective cohort study that included all singletons with T2DM with a scheduled delivery at a single tertiary care center between January 2008 and March 2022. Outcomes were compared using Fisher's exact test. Results: 107 singleton pregnancies were included. There was no significant difference in primary cesarean delivery between the two groups. The early term group had significantly higher rates of NICU admission compared to the term group (52% vs 32%, p = 0.05, OR 2.3, 95% CI 1.0–5.0), a finding that remained statistically significant on adjusted analysis (adjusted OR 2.81, 95% CI 1.04–7.58). Conclusions: In singleton pregnancies undergoing scheduled delivery for T2DM-specific indications, early term deliveries were associated with significantly increased odds of NICU admission when compared to term deliveries, even after adjusting for surrogate markers of glycemic control. These findings suggest that early term delivery contributes to risk of NICU admission, rather than the indication for delivery itself. These findings should be replicated in a larger cohort.

Abstract Background APOE 4 is the strongest genetic risk factor for Alzheimer’s disease (AD), and obesity is a strong environmental risk factor for AD. These factors result in multiple central nervous system (CNS) disturbances and significantly increase chances of AD. Since over 20% of the US population carry the APOE 4 allele and over 40% are obese, it is important to understand how these risk factors interact to affect neurons and glia in the CNS. Methods We fed male and female APOE3 and APOE4 knock-in mice a high-fat diet (HFD-45% kcal fat) or a "control" diet (CD-10% kcal fat) for 12 weeks beginning at 6 months of age. At the end of the 12 weeks, brains were collected and analyzed for gliosis, neuroinflammatory genes, and neuronal integrity. Results APOE 3 mice on HFD, but not APOE 4 mice, experienced increases in gliosis as measured by GFAP and Iba1 immunostaining. APOE4 mice on HFD showed a stronger increase in the expression of Adora2a than APOE3 mice. Finally, APOE3 mice on HFD, but not APOE 4 mice, also showed increased neuronal expression of immediate early genes cFos and Arc. Conclusions These findings demonstrate that APOE genotype and obesity interact in their effects on important processes particularly related to inflammation and neuronal plasticity in the CNS. During the early stages of obesity, the APOE3 genotype modulates a response to HFD while the APOE 4 genotype does not. This supports a model where early dysregulation of inflammation in APOE 4 brains could predispose to CNS damages from various insults and later result in the increased CNS damage normally associated with the APOE 4 genotype.