14 documents found, page 1 of 2
Diffuse Intestinal Involvement by Waldenström Macroglobulinemia: Clinical Case ...
Pereira, Nídia; Afonso, Luís Miguel; Soares, José; Honavar, Mrinalini; Santos, Maria João; Barreto, J. VascoGastrointestinal involvement in Waldenström macroglobulinemia is an extremely rare lymphoproliferative disorder. We describe a Waldenström macroglobulinemia patient presenting with diarrhea, dyspepsia, weight loss and malabsorption. Endoscopic studies revealed diffuse deposition of immunoglobulin M and kappa light chains in the mucosa of the small intestine. Later, on evaluation in the Haemato-Oncology clinic, ...
Isomorphic diffuse glioma is a morphologically and molecularly distinct tumour ...
Wefers, Annika K.; Stichel, Damian; Schrimpf, Daniel; Coras, Roland; Pages, Mélanie; Tauziède-Espariat, Arnault; Varlet, Pascale; Schwarz, DanielThe "isomorphic subtype of diffuse astrocytoma" was identified histologically in 2004 as a supratentorial, highly differentiated glioma with low cellularity, low proliferation and focal diffuse brain infiltration. Patients typically had seizures since childhood and all were operated on as adults. To define the position of these lesions among brain tumours, we histologically, molecularly and clinically analysed ...
Molecular Staging of Patients with Colon Cancer. The C-Closer-II Study: A Multi...
Brito, María José; Honavar, Mrinalini; Cipriano, Maria Augusta; Lopes, Joanne; Coelho, Helder; Silva, António Rodrigues da; Silva, MárioIntroduction: Approximately 20% - 30% of histological lymph node-negative patients with colorectal cancer relapse at five years after surgical treatment. This recurrence is likely due to occult nodal disease undetected by standard histopathological practice which has implications in terms of the clinical management of patients.Material and Methods: Lymph nodes were collected from colectomy specimens. A central ...
Hypoxia-mediated upregulation of MCT1 expression supports the glycolytic phenot...
Gonçalves, Vera Mónica Miranda; Granja, Sara Costa; Martinho, Olga; Honavar, Mrinalini; Pojo, Marta; Costa, Bruno Marques; Pires, Manuel MeloBackground: Glioblastomas (GBM) present a high cellular heterogeneity with conspicuous necrotic regions associated with hypoxia, which is related to tumor aggressiveness. GBM tumors exhibit high glycolytic metabolism with increased lactate production that is extruded to the tumor microenvironment through monocarboxylate transporters (MCTs). While hypoxia-mediated regulation of MCT4 has been characterized, the r...
Collagenous colitis: an underdiagnosed cause of chronic diarrhea
Morais, Sandra A.; Caçola, Rute; Beça, Sara; Carneiro, Liliana; Honavar, Mrinalini; Môço, RuiMicroscopic colitis is a disorder that includes collagenous colitis and lymphocytic colitis. It is considered to be a common cause of chronic diarrhea. Although it is benign, it can have a significant impact on the patient’s quality of life. The diagnosis is exclusively histological. Although microscopic colitis was first described in 1976, it has only recently been recognized as a common cause of diarrhea. Man...
Monocarboxylate transporters (MCTs) in gliomas : expression and exploitation as...
Gonçalves, Vera M.; Honavar, Mrinalini; Pinheiro, Céline; Martinho, Olga; Pires, Manuel Melo; Pinheiro, Célia; Cordeiro, Michelle; Bebiano, GilBackground. Gliomas exhibit high glycolytic rates, and monocarboxylate transporters (MCTs) play a major role in the maintenance of the glycolytic metabolism through the proton-linked transmembrane transport of lactate. However, their role in gliomas is poorly studied. Thus, we aimed to characterize the expression of MCT1, MCT4, and their chaperone CD147 and to assess the therapeutic impact of MCT inhibition in ...
Loss of WNK2 expression by promoter gene methylation occurs in adult gliomas an...
Moniz, Sónia; Martinho, Olga; Pinto, Filipe; Sousa, Bárbara; Loureiro, Cláudia; Oliveira, Maria José; Moita, Luís Ferreira; Honavar, MrinaliniThe gene encoding protein kinase WNK2 was recently identified to be silenced by promoter hypermethylation in gliomas and meningiomas, suggesting a tumour-suppressor role in these brain tumours. Following experimental depletion in cell lines, WNK2 was further found to control GTP-loading of Rac1, a signalling guanosine triphosphatase involved in cell migration and motility. Here we show that WNK2 promoter methyl...
Loss of WNK2 expression by promoter gene methylation occurs in adult gliomas an...
Moniz, Sónia; Martinho, Olga; Pinto, Filipe; Sousa, Bárbara; Loureiro, Claúdia; Oliveira, Maria José; Moita, Luis Ferreira; Honavar, MrinaliniThe gene encoding protein kinase WNK2 was recently identified to be silenced by promoter hypermethylation in gliomas and meningiomas, suggesting a tumour-suppressor role in these brain tumours. Following experimental depletion in cell lines, WNK2 was further found to control GTP-loading of Rac1, a signalling guanosine triphosphatase involved in cell migration and motility. Here we show that WNK2 promoter methyl...
Monocarboxylate transporters (MCTs) in gliomas: expression and exploitation as ...
Miranda-Goncalves, Vera; Honavar, Mrinalini; Pinheiro, Celine; Martinho, Olga; Pires, Manuel M.; Pinheiro, Celia; Cordeiro, Michelle; Bebiano, GilBackground. Gliomas exhibit high glycolytic rates, and monocarboxylate transporters (MCTs) play a major role in the maintenance of the glycolytic metabolism through the proton-linked transmembrane transport of lactate. However, their role in gliomas is poorly studied. Thus, we aimed to characterize the expression of MCT1, MCT4, and their chaperone CD 147 and to assess the therapeutic impact of MCT inhibition in...
Downregulation of RKIP is associated with poor outcome and malignant progressio...
Martinho, Olga; Granja, Sara Costa; Jaraquemada, Teresa; Caeiro, Cláudia; Gonçalves, Vera M.; Honavar, Mrinalini; Costa, Paulo; Damasceno, MargaridaMalignant gliomas are highly infiltrative and invasive tumors, which precludes the few treatment options available. Therefore, there is an urgent need to elucidate the molecular mechanisms underlying gliomas aggressive phenotype and poor prognosis. The Raf Kinase Inhibitory protein (RKIP), besides regulating important intracellular signaling cascades, was described to be associated with progression, metastasis ...