RESUMEN
The plant hormone abscisic acid (ABA) is released from glucose-challenged human pancreatic ß cells and stimulates insulin secretion. We investigated whether plasma ABA increased during oral and intravenous glucose tolerance tests (OGTTs and IVGTTs) in healthy human subjects. In all subjects undergoing OGTTs (n=8), plasma ABA increased over basal values (in a range from 2- to 9-fold). A positive correlation was found between the ABA area under the curve (AUC) and the glucose AUC. In 4 out of 6 IVGTTs, little or no increase of ABA levels was observed. In the remaining subjects, the ABA increase was similar to that recorded during OGTTs. GLP-1 stimulated ABA release from an insulinoma cell line and from human islets, by â¼10- and 2-fold in low and high glucose, respectively. Human adipose tissue also released ABA in response to high glucose. Nanomolar ABA stimulated glucose uptake, similarly to insulin, in rat L6 myoblasts and in murine 3T3-L1 cells differentiated to adipocytes, by increasing GLUT-4 translocation to the plasma membrane. Demonstration that a glucose load in humans is followed by a physiological rise of plasma ABA, which can enhance glucose uptake by adipose tissues and muscle cells, identifies ABA as a new mammalian hormone involved in glucose metabolism.
Asunto(s)
Ácido Abscísico/sangre , Adipocitos/efectos de los fármacos , Glucosa/farmacología , Hiperglucemia/sangre , Mioblastos/efectos de los fármacos , Células 3T3-L1 , Ácido Abscísico/metabolismo , Adipocitos/citología , Adipocitos/metabolismo , Tejido Adiposo/citología , Tejido Adiposo/metabolismo , Adolescente , Adulto , Animales , Glucemia/metabolismo , Western Blotting , Línea Celular Tumoral , Diabetes Mellitus Tipo 1/sangre , Femenino , Citometría de Flujo , Receptor del Péptido 1 Similar al Glucagón , Glucosa/farmacocinética , Prueba de Tolerancia a la Glucosa , Transportador de Glucosa de Tipo 4/metabolismo , Humanos , Ratones , Persona de Mediana Edad , Mioblastos/citología , Mioblastos/metabolismo , Interferencia de ARN , Receptores de Glucagón/genética , Receptores de Glucagón/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Adulto JovenRESUMEN
In recent years, requests for breast implant surgery have occurred for several reasons. First, the number of diagnosed breast cancer cases has increased, and the number of reconstructive surgeries consequently has multiplied. Second, the number of patients who constantly try to achieve a better physical shape, corresponding in Western countries to the common image of prosperous and tonic breasts, has proliferated. These circumstances have led to an increasingly frequent need for more accurate and sophisticated imaging methods to study prosthetic breast implants and their integrity. Diagnostic imaging for the study of patients with suspected breast implant ruptures uses different techniques of radiologic investigation such as mammography and ultrasonography, even if the current gold standard is magnetic resonance imaging (MRI). This study aimed to draw attention to the main MRI signs capable of highlighting contractures or ruptures of the implants that are not always clinically detectable and thus to provide plastic surgeons with an adequate instrument for discerning any possible alterations in prosthetic implants. Furthermore, it was necessary to stress the importance of teamwork. In fact, proper cooperation and coordination between radiologists and dedicated plastic surgeons are fundamental for the proper management of patients and the complications they may experience.
Asunto(s)
Implantación de Mama/efectos adversos , Implantes de Mama , Diagnóstico por Imagen/métodos , Falla de Prótesis , Implantación de Mama/métodos , Femenino , Humanos , Imagen por Resonancia Magnética/métodos , Mamografía/métodos , Pronóstico , Medición de Riesgo , Rotura Espontánea/diagnóstico , Ultrasonografía Mamaria/métodosRESUMEN
AIM: Facial aging is the union of multiple effects such as exposure to the sun, ambiental stress, smog, tobacco. It reflects the dynamic, cumulative effects of time on the skin, soft tissues, and deep structural components of the face showing skin textural changes and loss of facial volume. There are a multitude of techniques currently used to perform face lifts, but the unique objective is to achieve a good and safe result. METHODS: This paper describes a new safe approach to midfacial rejuvenation that combines the elements of superficial musculoaponeurotic system (SMAS) plication, about four vectors, with a blepharoplasty to achieve long-lasting improvement of the aging midface and a more natural effect. Plication of the SMAS over the suture, provides three vectors of elevation beneath the skin in midface rhytidectomy linked to the Lorè's fascia and the third vector of elevation of platysma behind the ear. RESULTS: This new technique, called KOr.U technique, was used in 31 patients between October 2010 and October 2012, producing effective long-lasting results, returning a volume of midface with no injury. DISCUSSION: This simplified approach is safe and can be easily performed under local anesthesia as an isolated midface procedure, avoiding the facial nerve.
RESUMEN
Necrosis of the NAC is a condition that penalizes patients who underwent breast reduction surgery or mastopexy. Breast reduction is a widely used technique for over-sized breasts. Breast hypertrophy, in fact, can cause the onset of many issues--both aesthetical and pathological--because of the excessive weight that the breasts exert on the patient's spine. Aim and objective of our study is to suggest a systematic use of diagnostic imaging composed of pre-operative and intraoperative ultrasound with color-Doppler and pre-operative MRI. Trying to solve this problem definitively, we relied on our notions of anatomy on ten fresh cadavers, on whose twenty breasts we could make very detailed dissections. The dissections led us to conclude that, albeit with their anatomic differences, each breast was characterized by a vascular-nervous pedicle coming out from the inter-costal spaces and aimed to the blood supply to the NAC. To overcome the anatomic variations between one subject and another--but also between one breast and the other from the same patient, we relied on diagnostic imaging, both in the pre-operative and in the intra-operative staging. This way we were able to intervene successfully with 15 patients, none of which has complained damages to the vascularity or innervation of the NAC so far. In conclusion we believe that pre and intra operative diagnostic imaging is the only way to completely eliminate any potential risk of NAC necrosis. Only by means of the systematic use of conventional imaging--especially during surgery--it is possible to constantly monitor the position of the NAC's pedicle in a breast that is being reduced in volume.
Asunto(s)
Mamoplastia , Pezones/cirugía , Enfermedades de la Mama/cirugía , Cadáver , Disección , Femenino , Humanos , Cuidados Intraoperatorios/métodos , Imagen por Resonancia Magnética/métodos , Mamoplastia/métodos , Persona de Mediana Edad , Necrosis , Pezones/diagnóstico por imagen , Pezones/patología , Cuidados Preoperatorios/métodos , Resultado del Tratamiento , Ultrasonografía Doppler en Color/métodosRESUMEN
AIM: To confirm that oncoplastic approach to cancer is a fundamental part of modern breast conserving surgery also in a suburban hospital. MATERIAL OF STUDY: The Authors used oncoplastic techniques in 60 cases including 45 first level and 15 second level procedures: they show some cases of conservative surgery and breast reshaping with upper, medial and lower pedicle. DISCUSSION: Screening programs are able to identify early breast cancer; the breast conserving surgery with oncoplastic glandular reshaping should be an established custom to ensure oncological safety with the best cosmetic result. CONCLUSIONS: The oncoplastic approach to breast cancer should be the theoretical and practical knowledge of the breast surgeon. Today in fact the breast surgeon must be a "vertical surgeon" in order to treat cancer completely, interfaced with a multidisciplinary team to ensure a personalized treatment for each patient. In this presentation the Authors want to focus on oncoplastic surgery in a medium flow suburban hospital.