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1.
Biochim Biophys Acta Mol Basis Dis ; 1866(8): 165810, 2020 08 01.
Article in English | MEDLINE | ID: mdl-32339641

ABSTRACT

The current standard of care for locally advanced rectal cancer (RC) is neoadjuvant radio-chemotherapy (NRC) with 5-fluorouracil (5Fu) as the main drug, followed by surgery and adjuvant chemotherapy. While a group of patients will achieve a pathological complete response, a significant percentage will not respond to the treatment. The Unfolding Protein Response (UPR) pathway is generally activated in tumors and results in resistance to radio-chemotherapy. We previously showed that RHBDD2 gene is overexpressed in the advanced stages of colorectal cancer (CRC) and that it could modulate the UPR pathway. Moreover, RHBDD2 expression is induced by 5Fu. In this study, we demonstrate that the overexpression of RHBDD2 in CACO2 cell line confers resistance to 5Fu, favors cell migration, adhesion and proliferation and has a profound impact on the expression of both, the UPR genes BiP, PERK and CHOP, and on the cell adhesion genes FAK and PXN. We also determined that RHBDD2 binds to BiP protein, the master UPR regulator. Finally, we confirmed that a high expression of RHBDD2 in RC tumors after NRC treatment is associated with the development of local or distant metastases. The collected evidence positions RHBDD2 as a promising prognostic biomarker to predict the response to neoadjuvant therapy in patients with RC.


Subject(s)
Drug Resistance, Neoplasm/genetics , Gene Expression Regulation, Neoplastic , Membrane Proteins/genetics , Rectal Neoplasms/therapy , Unfolded Protein Response/drug effects , Antimetabolites, Antineoplastic/pharmacology , Caco-2 Cells , Cell Adhesion/drug effects , Cell Movement/drug effects , Cell Proliferation/drug effects , Endoplasmic Reticulum Chaperone BiP , Fluorouracil/pharmacology , Focal Adhesion Kinase 1/genetics , Focal Adhesion Kinase 1/metabolism , Focal Adhesions/drug effects , HCT116 Cells , Heat-Shock Proteins/genetics , Heat-Shock Proteins/metabolism , Humans , Lymphatic Metastasis , Membrane Proteins/metabolism , Neoadjuvant Therapy/methods , Paxillin/genetics , Paxillin/metabolism , Protein Binding , Rectal Neoplasms/genetics , Rectal Neoplasms/metabolism , Rectal Neoplasms/pathology , Signal Transduction , Transcription Factor CHOP/genetics , Transcription Factor CHOP/metabolism , eIF-2 Kinase/genetics , eIF-2 Kinase/metabolism
2.
Pathol Res Pract ; 216(4): 152859, 2020 Apr.
Article in English | MEDLINE | ID: mdl-32081510

ABSTRACT

Breast cancer spreading to different organs have been related to different molecules and mechanisms, but cutaneous metastasis remains unexplored. Increasing evidence showed that MUC1 and some of its carbohydrate associated antigens may be implicated in breast cancer metastasis. In this study we analyzed these tumor markers in order to identify breast cancer cutaneous metastatic profiles. A cohort of 26 primary tumors from breast cancer patients with cutaneous metastases were included; also, cutaneous and lymphatic node metastatic samples and primary tumors from breast cancer patients without metastases were analysed. Immunohistochemical (IHC) studies demonstrated that both underglycosylated MUC1 (uMUC1) and sialyl Lewis x (sLex) to be positively associated with cutaneous metastatic primary tumors (p < 0.05). Notably, a high percentage of tumors with cutaneous metastases were characterized as triple negative and Her2+ tumors (37.5 % and 29 %, respectively). Some discordant results were found between primary tumors and their matched cutaneous metastases. To determine if MUC1 variants may be carriers of carbohydrate antigens, subcellular fractions from a cutaneous metastatic lesion were obtained, immunoprecipitated and analyzed by Western blot. We found that the isolated uMUC1 with a molecular weight of>200 kDa was also the site for binding of anti-sLex MAb; in coincidence, a high correlation of positive IHC expression of both markers was observed. Our findings confirm that breast cancer cutaneous metastases were associated to highly malignant primary tumors and sustain the hypothesis that u-MUC1 and sLe x may drive breast cancer cutaneous metastases.


Subject(s)
Biomarkers, Tumor/metabolism , Breast Neoplasms/pathology , Mucin-1/metabolism , Sialyl Lewis X Antigen/metabolism , Skin Neoplasms/secondary , Adult , Aged , Biomarkers, Tumor/analysis , Female , Humans , Middle Aged
3.
Tumour Biol ; 33(6): 2393-9, 2012 Dec.
Article in English | MEDLINE | ID: mdl-22965880

ABSTRACT

In previous studies, we identified rhomboid domain containing 2 (RHBDD2) gene to be markedly overexpressed in breast cancer patients that developed recurrence of the disease. In this study, we evaluated for the first time RHBDD2 gene expression in colorectal cancer (CRC). Five public available DNA microarray studies were compiled in a homogeneous dataset of 906 colorectal samples. The statistical analysis of these data showed a significant increase of RHBDD2 expression in the advanced stages of CRC (p < 0.01). We validated these findings by immunohistochemistry on 130 colorectal tissue samples; RHBDD2 protein overexpression was also observed in the advanced stages of the disease (p < 0.001). In addition, we investigated RHBDD2 expression in response to the chemotherapy agent 5-fluorouracile (5FU). We detected a significant increase of RHBDD2 mRNA and protein after 5FU treatment (20-40 µM; p < 0.001). Overall, these results showed that RHBDD2 overexpression might play a role in colorectal cancer progression.


Subject(s)
Antimetabolites, Antineoplastic/therapeutic use , Biomarkers, Tumor/genetics , Colorectal Neoplasms/genetics , Fluorouracil/therapeutic use , Neoplasm Proteins/genetics , Biomarkers, Tumor/metabolism , Blotting, Western , Case-Control Studies , Colon/metabolism , Colon/pathology , Colorectal Neoplasms/drug therapy , Colorectal Neoplasms/pathology , Gene Expression Profiling , Humans , Immunoenzyme Techniques , Membrane Proteins , Neoplasm Proteins/metabolism , Neoplasm Staging , Oligonucleotide Array Sequence Analysis , Prognosis , RNA, Messenger/genetics , Real-Time Polymerase Chain Reaction , Rectum/metabolism , Rectum/pathology , Reverse Transcriptase Polymerase Chain Reaction , Tumor Cells, Cultured
4.
Oncol. clín ; 11(1): 1278-1282, 2006. tab
Article in Spanish | BINACIS | ID: bin-119823

ABSTRACT

Los bioterios suelen no tener personal disponible para llevar un registro adecuado del desarrollo de una experiencia en particular. Pueden perderse datos relevantes o no anticiparse efectos adversos. El impacto es mayor en experimentos a largo plazo, como el estudios de la carcinogénesis. Nuestro grupo desarrolló modelos de historias clínicas (HC) y partes diarios para investigación (PDI) que incluyen procedimientos estandarizados para su confección. Objetivo: demostrar que el uso de HC y PDI permite realizar el seguimiento diario de animales de experimentación por largos períodos y complementa la formación de recursos humanos. Materiales y métodos: se usó como modelo de HC la utilizada por el Grupo Oncológico Cooperativo del Sur (GOCS). En la confección del PDI se consideraron los objetivos del estudio, variables ambientales y bienestar animal. Se entrenó a alumnos avanzados para el manejo de estas herramientas. Resultados: durante 370 días se cumplieron seguimientos diarios en : controles ambientales, cuidado de los animales y prácticas generales. La limpieza de la cama y la detección de ruidos fueron las variables que se recogieron con más frecuencia. El sangrado de fosas nasales, pérdida de pelo y lesiones en piel y mucosas fueron las observaciones más comunes. Se obtuvieron datos para análisis interinos y retrospectivos de posible utilidad a la hora de interpretar resultados. Conclusiones: estas sencillas herramientas, HC y PDI, simplificaron y optimizaron la observación diaria de los animales, pudiéndose realizar acciones correctivas rápidas y permitiendo que alumnos avanzados puedan entrenarse en el manejo de animales de experimentación (AU)


Subject(s)
Animals , Research/methods , Neoplasms/veterinary , Veterinary Medicine , Animals, Laboratory , Records
5.
Oncol. clín ; 11(1): 1278-1282, 2006. tab
Article in Spanish | LILACS | ID: lil-434750

ABSTRACT

Los bioterios suelen no tener personal disponible para llevar un registro adecuado del desarrollo de una experiencia en particular. Pueden perderse datos relevantes o no anticiparse efectos adversos. El impacto es mayor en experimentos a largo plazo, como el estudios de la carcinogénesis. Nuestro grupo desarrolló modelos de historias clínicas (HC) y partes diarios para investigación (PDI) que incluyen procedimientos estandarizados para su confección. Objetivo: demostrar que el uso de HC y PDI permite realizar el seguimiento diario de animales de experimentación por largos períodos y complementa la formación de recursos humanos. Materiales y métodos: se usó como modelo de HC la utilizada por el Grupo Oncológico Cooperativo del Sur (GOCS). En la confección del PDI se consideraron los objetivos del estudio, variables ambientales y bienestar animal. Se entrenó a alumnos avanzados para el manejo de estas herramientas. Resultados: durante 370 días se cumplieron seguimientos diarios en : controles ambientales, cuidado de los animales y prácticas generales. La limpieza de la cama y la detección de ruidos fueron las variables que se recogieron con más frecuencia. El sangrado de fosas nasales, pérdida de pelo y lesiones en piel y mucosas fueron las observaciones más comunes. Se obtuvieron datos para análisis interinos y retrospectivos de posible utilidad a la hora de interpretar resultados. Conclusiones: estas sencillas herramientas, HC y PDI, simplificaron y optimizaron la observación diaria de los animales, pudiéndose realizar acciones correctivas rápidas y permitiendo que alumnos avanzados puedan entrenarse en el manejo de animales de experimentación


Subject(s)
Animals , Research/methods , Neoplasms/veterinary , Veterinary Medicine , Animals, Laboratory , Directory
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