Person:
Peña Fernández, Laura Luisa

First Name

Laura Luisa

Last Name

Peña Fernández

URI

https://hdl.handle.net/20.500.14352/80626

Affiliation

Universidad Complutense de Madrid

Faculty / Institute

Veterinaria

Department

Medicina y Cirugía Animal

Area

Medicina y Cirugía Animal

Identifiers

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Now showing 1 - 10 of 22

Project number: 238
Implantación de un sistema de telepatología digital para la enseñanza práctica de Anatomía Patológica General (asignatura de 2º curso del Grado en Veterinaria)
(2015) Peña Fernández, Laura Luisa; González Huecas, Marta; García Fernández, Rosa Ana; Pizarro Díaz, Manuel; Tabanera De Lucio, Enrique
Observación mediante ordenador de preparaciones histopatológicas escaneadas (microscopio virtual) a través del campus virtual, sustituyendo así parcialmente la docencia práctica tradicional con microscopio óptico, sin que existan limitaciones de temporalidad y espacio. Se potencia el aprendizaje autónomo con bajo coste y la coordinación de la docencia práctica con otras asignaturas. Cuando el alumno prefiera, desde cualquier ordenador y con la duración que sea necesaria, con una gran calidad de imagen y un software básico que contiene las herramientas de manejo de la preparación escaneada en su totalidad semejante a un microscopio virtual.
Tumor Growth Progression in Ectopic and Orthotopic Xenografts from Inflammatory Breast Cancer Cell Lines
(Veterinary Sciences, 2021) Cáceres Ramos, Sara Cristina; Alonso-Diez, Angela; Crespo, Belén; Peña Fernández, Laura Luisa; Illera Del Portal, Josefina María; Silván Granado, Gema; Andrés Gamazo, Paloma Jimena De; Illera Del Portal, Juan Carlos
Xenografts can grow in immunosuppressed hosts, such as SCID mice, and tumor material can be injected into hosts either ectopically or orthotopically. Choosing the correct model to use is a crucial step in animal research. The aim of this study was to report the differences between ectopic and orthotopic xenografts in tumor progression, metastasis capacity, histological features, and steroid hormone profiles in xenografts from the cIMC (canine inflammatory mammary cancer) cell line IPC-366 and hIBC (human inflammatory breast cancer) cell line SUM149. To achieve this purpose, 40 female mice 6–8 weeks old were inoculated with IPC-366 and SUM149 cells subcutaneously (ectopic models) or into mammary fat pad (orthotopic models). Mice were monitored for tumor progression and appearance of metastases, and generated tumors were analyzed in terms of histological examination and steroid hormone production. The results revealed differences in tumor appearance and percentage of metastasis between ectopic and orthotopic models, which were higher in the ectopic xenografts from both cell lines. However, both models had similar characteristics of tumor progression, histological features, and steroid hormone secretion profiles. We show that the ectopic model can be validated as a good and useful model of tumor development in addition to, not contrary to, the orthotopic model in breast cancer research.
Steroid pathway and oestrone sulphate production in canine inflammatory mammary carcinoma
(The Journal of Steroid Biochemistry and Molecular Biology, 2007) Sánchez-Archidona, Ana R.; Jiménez Martínez, María De Los Ángeles; Pérez Alenza, María De Los Dolores; Silván Granado, Gema; Illera Del Portal, Juan Carlos; Peña Fernández, Laura Luisa; Dunner Boxberger, Helene Susana
Spontaneous canine mammary inflammatory carcinoma (IMC) shares epidemiologic, histopathologic and clinical characteristics with the inflammatory breast carcinoma (IBC) disease in humans. We have analysed the steroids levels in serum and in tissue homogenates of IMC, the expression of two of their receptors (androgen and β-estrogen) and of three enzymes included in the steroidogenesis pathway (aromatase (CYP19A1), steroid sulphatase (STS) and estrogen sulfotransferase (EST)) trying to explain the specific accumulation of steroids in IMC tissues generating deposits in the form of lipid droplets whose presence can be attributed to steroids secreted by IMC cells. According to our working hypothesis, oestrone sulphate would be the main component of these lipid droplets. The presence of these steroid deposits would contribute to the intense proliferation and invasive behaviour of IMC and IBC, although their involvement in angiogenesis is yet to be demonstrated.
Aqueous dispersions of oleic acid nanodroplets for thymol encapsulation
(Colloids and Surfaces A, 2024) Paula Gutiérrez-González; Peña Fernández, Laura Luisa; Alejandro Lucia; Ortega Gómez, Francisco; González Rubio, Ramón; Guzmán Solís, Eduardo
This study focuses on the use of oleic acid to disperse thymol as nanodroplets, stabilized by a mixture of alkylpolyglucoside and lecithin, in an aqueous environment. This approach aims to develop innovative platforms for the encapsulation and release of poorly water-soluble molecules such as thymol, useful for drug delivery and insecticide systems. The results highlight the critical role of controlling the content and concentration of the oil phase (thymol-oleic acid mixture) in achieving optimal thymol dispersion and nanodispersion stability. The interplay between the ability of oleic acid to inhibit thymol crystallization and the maximum dispersible oil amount is crucial. It affects the dispersion of thymol within the nanodroplets and influences coalescence and Ostwald ripening phenomena. The balance between oleic acid and thymol content is key: while oleic acid stabilizes dispersions, higher thymol content increases droplet size, potentially triggering destabilization. The uneven distribution of thymol within the droplets, revealed by fluorescence spectroscopy, suggests that up to three different chemical environments exist. This investigation may pave the way for the development of efficient platforms to improve access to biologically relevant, poorly soluble molecules.
Project number: 263
Diseño e implementación de un taller de aprendizaje transversal basado en la resolución de problemas en Histología y Anatomía Patológica Veterinarias
(2020) Jiménez Martínez, María De Los Ángeles; Andrés Gamazo, Paloma Jimena De; Sánchez Maldonado, María Belén; García Palencia, María Del Pilar; Sánchez Pérez, María De Los Ángeles; García Fernández, Rosa Ana; Rollán Landeras, Eduardo Ricardo; González Huecas, Marta; Tabanera De Lucio, Enrique; Peña Fernández, Laura Luisa
Mediante el desarrollo de un taller práctico empleando las técnicas de aprendizaje basado en la resolución de problemas y deducción de pruebas, los alumnos de tres asignaturas diferentes pero relacionadas (Histología Veterinaria, Anatomía Patológica General y Especial), del grado en veterinaria, participaron en su propio proceso de aprendizaje, trabajando en equipo, desarrollando habilidades deductivas y críticas al resolver y analizar supuestos reales, que les ayudarán a estar mejor preparados para su futuro profesional.
First description of feline inflammatory mammary carcinoma: clinicopathological and immunohistochemical characteristics of three cases
(2004) Pérez Alenza, María De Los Dolores; Jiménez Martínez, María De Los Ángeles; Nieto Ruiz De Zárate, Ana Isabel; Peña Fernández, Laura Luisa
INTRODUCTION: Inflammatory breast cancer is a special type of locally advanced mammary cancer that is associated with particularly aggressive behaviour and poor prognosis. The dog was considered the only natural model in which to study the disease because, until now, it was the only species known to present with inflammatory mammary carcinoma (IMC) spontaneously. In the present study we describe clinicopathological and immunohistochemical findings of three cats with IMC, in order to evaluate its possible value as an animal model. METHODS: We prospectively studied three female cats with clinical symptoms of IMC, identified over a period of 3 years. Clinicopathological and immunohistochemical evaluations of Ki-67, and oestrogen, progesterone and androgen receptors were performed. RESULTS: All three animals presented with secondary IMC (postsurgical) characterized by a rapid onset of erythema, severe oedema, extreme local pain and firmness, absence of subjacent mammary nodules, and involvement of extremities. Rejection of the surgical suture was observed in two of the cats. Histologically, highly malignant papillary mammary carcinomas, dermal tumour embolization of superficial lymphatic vessels, and severe secondary inflammation were observed. The animals were put to sleep at 10, 15 and 45 days after diagnosis. Metastases were detected in regional lymph nodes and lungs in the two animals that were necropsied. All tumours had a high Ki-67 proliferation index and were positive for oestrogen, progesterone and androgen receptors. CONCLUSION: Our findings in feline IMC (very low prevalence, only secondary IMC, frequent association of inflammatory reaction with surgical suture rejection, steroid receptor positivity) indicate that feline IMC could be useful as an animal model of human inflammatory breast cancer, although the data should be considered with caution.
Steroids and receptors in canine mammary cancer
(Steroids, 2006) Illera Del Portal, Juan Carlos; Pérez Alenza, María De Los Dolores; Nieto Ruiz De Zárate, Ana Isabel; Jiménez, María; Silván Granado, Gema; Dunner Boxberger, Helene Susana; Peña Fernández, Laura Luisa
The aims of this study were to investigate the serum and tissue content of androgens and estrogens in canine inflammatory mammary carcinomas (IMC) as well as in non-inflammatory malignant mammary tumors (MMT), and assessed the immunoexpression of estrogen and androgen receptors using immunohistochemistry. Profiles for the androgens dehydroepiandrosterone (DHEA), androstenedione (A4), and testosterone (T), and for the estrogens 17β estradiol (E2) and estrone-sulphate (SO4E1) were measured both in tissue homogenates and in serum of MMT and IMC by EIA techniques in 42 non-inflammatory malignant mammary tumors (MMT) and in 14 inflammatory mammary carcinomas (IMC), prospectively collected from 56 female dogs. Androgen receptor (AR) and estrogen receptor alpha (ERα) and beta (ERβ) expression was studied using immunohistochemistry (strepavidin–biotin-peroxidase method) in samples of 32 MMT and 14 IMC, and counted by a computer image analyzer. IMC serum and tissue levels of androgens were significantly higher than MMT levels. Tissue content of estrogens was also significantly higher in IMC than in MMT. Serum values of SO4E1 were significantly higher in IMC, but serum levels of E2 were significantly lower in IMC compared to MMT cases. Medium-high androgen receptor intensity was observed in 64.28% of IMC and 40.62% of MMT. No important differences were found between ERα expression in IMC (100% negative) and MMT (90% negative). ERβ and AR were intensely expressed in highly malignant inflammatory mammary carcinoma cells. To our knowledge, this is the first report relative to AR immunohistochemistry in canine mammary cancer and to estrogens or androgens in serum of dogs with benign or malignant mammary tumors.
Transcriptomics of Canine Inflammatory Mammary Cancer Treated with Empty Cowpea Mosaic Virus Implicates Neutrophils in Anti-Tumor Immunity
(International Journal of Molecular Sciences, 2023) Barreno San Antolín, Lucía; Sevane Fernández, Natalia; Valdivia Lara, Edgar Guillermo; Alonso Miguel, Daniel; Suárez Redondo, María; Alonso Díez, Ángela; Fiering, Steven; Beiss, Veronique; Steinmetz, Nicole F.; Pérez Alenza, María De Los Dolores; Peña Fernández, Laura Luisa
Canine inflammatory mammary cancer (IMC) is a highly aggressive and lethal cancer in dogs serving as a valuable animal model for its human counterpart, inflammatory breast cancer (IBC), both lacking effective therapies. Intratumoral immunotherapy (IT-IT) with empty cowpea mosaic virus (eCPMV) nanoparticles has shown promising results, demonstrating a reduction in tumor size, longer survival rates, and improved quality of life. This study compares the transcriptomic profiles of tumor samples from female dogs with IMC receiving eCPMV IT-IT and medical therapy (MT) versus MT alone. Transcriptomic analyses, gene expression profiles, signaling pathways, and cell type profiling of immune cell populations in samples from four eCPMV-treated dogs with IMC and four dogs with IMC treated with MT were evaluated using NanoString Technologies using a canine immune-oncology panel. Comparative analyses revealed 34 differentially expressed genes between treated and untreated samples. Five genes (CXCL8, S100A9, CCL20, IL6, and PTGS2) involved in neutrophil recruitment and activation were upregulated in the treated samples, linked to the IL17-signaling pathway. Cell type profiling showed a significant increase in neutrophil populations in the tumor microenvironment after eCPMV treatment. These findings highlight the role of neutrophils in the anti-tumor response mediated by eCPMV IT-IT and suggest eCPMV as a novel therapeutic approach for IBC/IMC.
Establishment and Characterization of a New Cell Line of Canine Inflammatory Mammary Cancer: IPC-366
(PLoS ONE, 2015) Cáceres Ramos, Sara Cristina; Peña Fernández, Laura Luisa; Andrés Gamazo, Paloma Jimena De; Illera Del Portal, Josefina María; Lopez, Mirtha S.; Woodward, Wendy A.; Reuben, James M.; Illera Del Portal, Juan Carlos
Canine inflammatory mammary cancer (IMC) shares epidemiologic, histopathological and clinical characteristics with the disease in humans and has been proposed as a natural model for human inflammatory breast cancer (IBC). The aim of this study was to characterize a new cell line from IMC (IPC-366) for the comparative study of both IMC and IBC. Tumors cells from a female dog with clinical IMC were collected. The cells were grown under adherent conditions. The growth, cytological, ultrastructural and immunohistochemical (IHC) characteristics of IPC-366 were evaluated. Ten female Balb/SCID mice were inoculated with IPC-366 cells to assess their tumorigenicity and metastatic potential. Chromosome aberration test and Karyotype revealed the presence of structural aberration, numerical and neutral rearrangements, demonstrating a chromosomal instability. Microscopic examination of tumor revealed an epithelial morphology with marked anysocytosis. Cytological and histological examination of smears and ultrathin sections by electron microscopy revealed that IPC-366 is formed by highly malignant large round or polygonal cells characterized by marked atypia and prominent nucleoli and frequent multinucleated cells. Some cells had cytoplasmic empty spaces covered by cytoplasmic membrane resembling capillary endothelial cells, a phenomenon that has been related to s vasculogenic mimicry. IHC characterization of IPC-366 was basal-like: epithelial cells (AE1/AE3+, CK14+, vimentin+, actin-, p63-, ER-, PR-, HER-2, E-cadherin, overexpressed COX-2 and high Ki-67 proliferation index (87.15 %). At 2 weeks after inoculating the IPC-366 cells, a tumor mass was found in 100 % of mice. At 4 weeks metastases in lung and lymph nodes were found. Xenograph tumors maintained the original IHC characteristics of the female dog tumor. In summary, the cell line IPC-366 is a fast growing malignant triple negative cell line model of inflammatory mammary carcinoma that can be used for the comparative study of both IMC and IBC.
Histopathological and immunohistochemical findings in lymphoid tissues of the endangered Iberian lynx (Lynx pardinus)
(Comparative Immunology, Microbiology and Infectious Diseases, 2006) Peña Fernández, Laura Luisa; García Palencia, María Del Pilar; Jiménez Martínez, María De Los Ángeles; Benito, Alberto; Pérez Alenza, María De Los Dolores; Sánchez Maldonado, María Belén
The Iberian lynx (Lynx pardinus) is the most threatened wild feline in the world. Little is known about the diseases and pathology that affect this animal. The aim of this study was to evaluate the histopathological status of the peripheral lymphoid tissues and thymus of Iberian lynxes necropsied between 1998 and 2003. Seventeen animals including females (n=8) and males (n=9), age range of 10 months to 16 years, with different causes of death were histopathologically and immunohistochemically (anti-CD3, CD79, MAC387, CD68) studied. Feline immunosuppressive virus laboratorial tests were negative. Five individuals presented neoplasia and/or tuberculosis. All animals presented some degree of both B and T cells depletion in peripheral lymphoid tissues and follicular hyalinosis in the center of depleted follicles. A viral origin of the lymphoid depletion is postulated although other causes (inbreeding, stress, toxic) are not ruled out. The loss of the effectiveness of the immune system increases the vulnerability of the critically endangered Iberian lynx to pathogens