Oleic acid regulates the circadian rhythm of adipose tissue in obesity.

The effect of oleic acid (OA) on the regulation of the circadian rhythm present in human visceral (VAT) and subcutaneous (SAT) adipose tissue from patients with morbid obesity has not been analyzed yet. VAT and SAT explants from patients with morbid obesity were incubated with OA to analyze the circadian regulation of clock and other genes related to lipid metabolism (SREBP-1c, FAS, LPL and CPT1), and their association with baseline variables and the improvement of these patients after bariatric surgery. There were significant differences in amplitude and acrophase in VAT with respect to SAT. In VAT, body weight negatively correlated with BMAL1 and CRY1 amplitude, and REVERBα acrophase; body mass index (BMI) negatively correlated with REVERBα acrophase; and waist circumference negatively correlated with PER3 acrophase. In SAT, BMI negatively correlated with CLOCK amplitude, and CLOCK, REVERBα and CRY2 MESOR; and waist circumference negatively correlated with PER3 amplitude and acrophase. A greater short-term improvement of body weight, BMI and waist circumference in patients with morbid obesity after bariatric surgery was associated with a lower CRY1 and CRY2 amplitude and an earlier PER1 and PER3 acrophase in SAT. OA produced a more relevant circadian rhythm and increased the amplitude of most clock genes and lipid metabolism-related genes. OA regulated the acrophase of most clock genes in VAT and SAT, placing CLOCK/BMAL1 in antiphase with regard to the other genes. OA increased the circadian rhythmicity, although with slight differences between adipose tissues. These differences could determine its different behavior in obesity.

[Adrenal carcinoma: 7 year disease free survival after complete primary tumor resection and repeated resection of local-regional and distant recurrences. Review after one case with poor initial life expectancy]. / Carcinoma suprarrenal: supervivencia a 7 años libre de enfermedad tras resección completa del tumor primario y resecciones repetidas de recidivas locorregional y a distancia. Revisión a raiz de un caso con una pobre esperanza de vida inicial.

OBJECTIVES: We report the case of a female patient with adrenal carcinoma who had undergone surgery and presented with local-regional and distant recurrences, emphasizing the importance of the aggressive surgical treatment to achieve long-term survival which is unexpected sometimes. Currently, it represents the gold standard and all cases should be reported to stimulate other groups to work in this line. METHODS/RESULTS: We report the case of a 29-year-old female patient who consulted for left flank pain, being diagnosed of an adrenal tumor by radiological tests; she underwent surgical excision of a left adrenal carcinoma (stage II). Later on she presented with local-regional recurrences (2 times) and distant metastases (liver) undergoing excision in three procedures. Currently, the patient is alive and free of disease 7 years after diagnosis. CONCLUSIONS: Adrenal cancer recurrences have been considered lethal in the short-term. Nevertheless, an aggressive surgical approach of local recurrences and metastasic disease may significantly prolong patient's survival and, sometimes, leave the patient disease free several years after the diagnosis of the primary tumor.