A comparative study between mixed-type tumours from human salivary and canine mammary glands

<p>Abstract</p> <p>Background</p> <p>In comparative pathology, canine mammary tumours have special interest because of their similarities with human breast cancer. Mixed tumours are uncommon lesions in the human breast, but they are found most frequently in the mammary gland of the female dogs and in the human salivary glands. The aim of the study was to compare clinical, morphological and immunohistochemical features of human salivary and canine mammary gland mixed tumours, in order to evaluate the latter as an experimental model for salivary gland tumours.</p> <p>Methods</p> <p>Ten examples of each mixed tumour type (human pleomorphic adenoma and carcinomas ex-pleomorphic adenomas and canine mixed tumour and metaplastic carcinoma) were evaluated. First, clinical and morphologic aspects of benign and malignant variants were compared between the species. Then, streptavidin-biotin-peroxidase immunohistochemistry was performed to detect the expression of cytokeratins, vimentin, p63 protein, estrogen receptor, β-catenin, and E-cadherin.</p> <p>Results</p> <p>After standardization, similar age and site distributions were observed in human and canine tumours. Histological similarities were identified in the comparison of the benign lesions as well. Metaplastic carcinomas also resembled general aspects of carcinomas ex-pleomorphic adenomas in morphological evaluation. Additionally, immunohistochemical staining further presented similar antigenic expression between lesions.</p> <p>Conclusion</p> <p>There are many similar features between human salivary and canine mammary gland mixed tumours. This observation is of great relevance for those interested in the study and management of salivary gland tumours, since canine lesions may constitute useful comparative models for their investigations.</p

NIR LASER-RESPONSIVE FOLATE-TARGETED GOLD NANORODS AS EFFICIENT THERANOSTIC TOOL FOR OSTEOSARCOMA TREATMENT

Folate-targeted gold nanorods (GNRs) are here proposed as selective theranostic agents for osteosarcoma treatment. Taking advantage of the attractive physiochemical and optical properties of GNRs they can be proposed as effective and selective platform to obtain a targeted intracellular drug release, photothermal therapy and cancer imaging, which may improve therapeutic outcomes of osteosarcoma. An amphiphilic polysaccharide graft-copolymer, named INU-LA-PEG-FA, and a folic acid functionalized \u3b1,\u3b2-poly(N-2-hydroxyethyl)-D,L-aspartamide (PHEA-FA), have been synthesized to act as coating agents for GNRs. The obtained polymer-coated GNRs were characterized in terms of size, shape, zeta potential, chemical composition, aqueous stability. They protected the anticancer drug nutlin-3 in human plasma and were able to deliver it efficiently in different physiological media. The proposed systems selectively exert their toxic effect towards U2OS cancer cells expressing high levels of FRs compared with normal human bronchial epithelial cells (16HBE) and human dermal fibroblasts (HDFa). Moreover, we report the ability of the nanosystems of efficiently controlling drug release upon NIR laser irradiation and of acting as an excellent hyperthermia agent as well as Two Photon Luminescence imaging contrast agents. The proposed folate-targeted GNRs have also been tested in terms of chemoterapeutic and thermoablation efficacy on tridimensional (3-D) osteosarcoma models which better mimic cancer microenvironments and therefore offer the promise of improving clinical efficacy. Overall, the proposed folate targeted GNRs displayed outstanding anticancer activity on bidimensional and on 3-D tumor models, making them appealing multimodal agents for image-guided therapies based on localized hyperthermia and chemoterapy of solid tumors

Predictors of early discontinuation of dapagliflozin versus other glucose-lowering medications: a retrospective multicenter real-world study

In routine clinical practice, early discontinuation of newly initiated glucose-lowering medications (GLM) is relatively common. We herein evaluated if the clinical characteristics associated with early discontinuation of dapagliflozin were different from those associated with early discontinuation of other GLM

A rare complication of ERCP: Mallory-Weiss syndrome

OBJECTIVE: To describe the management and outcome after endoscopic treatment of hematemesis by Mallory-Weiss Syndrome (MWS) occurred after CPRE (suspected choledocolithiasis). Background data: Although cough and retching is common during EGD or CPRE, MWS resulting from endoscopy seems to be uncommon (0.0001-0.04%) and always self-limiting. Case report: The patient was submitted to CPRE with the suspicion of choledocholithiasis. Eight hours after CPRE the patient presented with hematemesis amd hypotension. With emergency EGD, the AA identified a small bleeding mucosal tear (visible vessel with spurting) just proximal to the esophagogastric junction. The patient was safely treated with endoscopic hemoclipping after the failure of sclerotherapy. CONCLUSIONS: The usefulness of hemoclipping in MWS is emphasized: although always self-limiting, endoscopic hemo- stasis is mandatory in high risk patients. The hemoclips are effective and safe in hemostasis in the case of bleeding visible vessel (spurting or oozing), even with or after sclerotherapy. The hemoclips not obstacles the healing. Copyright © 2005 Edizioni Luigi Pozzi