Mutant APC reshapes Wnt signaling plasma membrane nanodomains by altering cholesterol levels via oncogenic β-catenin.

Although the role of the Wnt pathway in colon carcinogenesis has been described previously, it has been recently demonstrated that Wnt signaling originates from highly dynamic nano-assemblies at the plasma membrane. However, little is known regarding the role of oncogenic APC in reshaping Wnt nanodomains. This is noteworthy, because oncogenic APC does not act autonomously and requires activation of Wnt effectors upstream of APC to drive aberrant Wnt signaling.

Age-Specific Reference Ranges for Serum Prostate-Specific Antigen in Puerto Rican Men with Proven Prostate Cancer.

Objective: The purpose of this research was to carry out a statistical study (the first such) of prostate-specific antigen (PSA) levels in Puerto Rican men (including residents of Puerto Rico not born on the island) with proven prostate cancer (PC). We also sought to propose new age-specific PSA reference ranges to improve the diagnosis and prognosis of PC.

Methods: In order to address our objectives, a PSA statistical analysis of 16,305 Puerto Rican men (from 2004-2012) with proven PC was carried out.

An Analytical Study of Prostate-Specific Antigen Dynamics.

The purpose of this research is to carry out a quantitative study of prostate-specific antigen dynamics for patients with prostatic diseases, such as benign prostatic hyperplasia (BPH) and localized prostate cancer (LPC). The proposed PSA mathematical model was implemented using clinical data of 218 Japanese patients with histological proven BPH and 147 Japanese patients with LPC (stages T2a and T2b). For prostatic diseases (BPH and LPC) a nonlinear equation was obtained and solved in a close form to predict PSA progression with patients' age.

Localization of an ectopic parathyroid adenoma by double-phase technetium-99m-sestamibi scintigraphy.

Double-phase planar scintigraphy using 99mTc-MIBI has been introduced as a means to detect and localize parathyroid adenomas. Focal uptake on both early and delayed imaging is typical of these entities. We report a patient with persistent hypercalcemia following subtotal parathyroidectomy, who was found scintigraphically to have an ectopic parathyroid adenoma.