Xaviera López cortés

Dr. Xaviera López cortés

orcid

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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4 June 2022 in Applied Sciences
Verified
Journal Article
Open access
PDF file
XCXaviera López cortés
Xaviera López cortés
FMFelipe Matamala
Felipe Matamala
BVBernardo Venegas
Bernardo Venegas
CRCésar Rivera
César Rivera
Over the years, several machine-learning applications have been suggested to assist in various clinical scenarios relevant to oral cancer. We offer a systematic review to identify, assess, and summarize the evidence for reported uses in the areas of oral cancer detection and prevention, prognosis, pre-cancer, treatment, and quality of life. The main algorithms applied in the context of oral cancer applications corresponded to SVM, ANN, and LR, comprising 87.71% of the total published articles in the field. Genomic, histopathological, image, medical/clinical, spectral, and speech data were used most often to predict the four areas of application found in this review. In conclusion, our study has shown that machine-learning applications are useful for prognosis, diagnosis, and prevention of potentially malignant oral lesions (pre-cancer) and therapy. Nevertheless, we strongly recommended the application of these methods in daily clinical practice.

17 April 2024 in Frontiers in Microbiology
Verified
Journal Article
Open access
PDF file
XCXaviera López cortés
Xaviera López cortés
JMJosé M. Manríquez-Troncoso
José M. Manríquez-Troncoso
RHRuber Hernández-García
Ruber Hernández-García
DPDaniel Peralta
Daniel Peralta
\L\R\Nxaviera A. L
\R\Nxaviera A. L
JOJos
Jos
Introduction: Antimicrobial resistance (AMR) is a global health problem that requires early and effective treatments to prevent the indiscriminate use of antimicrobial drugs and the outcome of infections. Mass Spectrometry (MS), and more particularly MALDI-TOF, have been widely adopted by routine clinical microbiology laboratories to identify bacterial species and detect AMR. The analysis of AMR with deep learning is still recent, and most models depend on filters and preprocessing techniques manually applied on spectra.Methods: This study propose a deep neural network, MSDeepAMR, to learn from raw mass spectra to predict AMR. MSDeepAMR model was implemented for Escherichia coli, Klebsiella pneumoniae, and Staphylococcus aureus under different antibiotic resistance profiles. Additionally, a transfer learning test was performed to study the benefits of adapting the previously trained models to external data.Results: MSDeepAMR models showed a good classification performance to detect antibiotic resistance. The AUROC of the model was above 0.83 in most cases studied, improving the results of previous investigations by over 10%. The adapted models improved the AUROC by up to 20% when compared to a model trained only with external data.Discussion: This study demonstrate the potential of the MSDeepAMR model to predict antibiotic resistance and their use on external MS data. This allow the extrapolation of the MSDeepAMR model to de used in different laboratories that need to study AMR and do not have the capacity for an extensive sample collection.

1 February 2015 in Food Chemistry
Verified
Journal Article
Closed access
Esteban Durán-LaraEsteban Durán-Lara
Esteban Durán-Lara
XCXaviera López cortés
Xaviera López cortés
RCRicardo I Castro
Ricardo I Castro
FAFabian Avila-Salas
Fabian Avila-Salas
FGFernando Gonzalez-Nilo
Fernando Gonzalez-Nilo
LSLeonardo S. Santos
Leonardo S. Santos

1 March 2017 in Aquaculture
Verified
Journal Article
Closed access
XCXaviera López cortés
Xaviera López cortés
FNFabiane M. Nachtigall
Fabiane M. Nachtigall
VOVerónica R. Olate
Verónica R. Olate
MAMacarena Araya
Macarena Araya
SOSandra Oyanedel
Sandra Oyanedel
LSLeonardo S. Santos
Leonardo S. Santos

Verified
Journal Article
Open access
PDF file
XCXaviera López cortés
Xaviera López cortés
JTJosé Matías Manriquez Troncoso
José Matías Manriquez Troncoso
AYAlejandra Tania Yáñez
Alejandra Tania Yáñez
PSPATRICIO SUAZO-SOTO
PATRICIO SUAZO-SOTO
Antimicrobial resistance (AMR) is one of the most pressing public health challenges of the 21st century. This study aims to evaluate the efficacy of mass spectral data generated by VITEK® MS instruments for predicting antibiotic resistance in Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae using machine learning algorithms. Additionally, the potential of pre-trained models was assessed through transfer learning analysis. A dataset comprising 2229 mass spectra was collected, and classification algorithms, including Support Vector Machines, Random Forest, Logistic Regression, and CatBoost, were applied to predict resistance. CatBoost demonstrated a clear advantage over the other models, effectively handling complex non-linear relationships within the spectra and achieving an AUROC of 0.91 and an F1 score of 0.78 for E. coli. In contrast, transfer learning yielded suboptimal results. These findings highlight the potential of gradient-boosting techniques to enhance resistance prediction, particularly with data from less conventional platforms like VITEK® MS. Furthermore, the identification of specific biomarkers using SHAP values indicates promising potential for clinical applications in early diagnosis. Future efforts focused on standardizing data and refining algorithms could expand the utility of these approaches across diverse clinical environments, supporting the global fight against AMR.

23 August 2024 in Journal of Chromatography A
Verified
Journal Article
Closed access
XCXaviera López cortés
Xaviera López cortés
JMJosé M. Manríquez-Troncoso
José M. Manríquez-Troncoso
JKJohn Kandalaft-Letelier
John Kandalaft-Letelier
SCSara Cuadros-Orellana
Sara Cuadros-Orellana