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Juan Carlos Alvarez Moreno,Hisham F. Bahmad,Christopher A. Febres-Aldana,Andrés Pirela,Andres Azuero,Ali Salami,Robert Poppiti 대한병리학회 2021 Journal of Pathology and Translational Medicine Vol.55 No.6
Background: Acute kidney injury (AKI) is a common cause of morbidity and mortality. It mainly targets the renal tubular epithelium with pathological changes, referred to as acute tubular injury. The latter is followed by a regenerative response that is difficult to visualize on routine hematoxylin and eosin (H&E) stains. In this study, we examined the regenerative capacity of renal tubules by correlating vimentin (VIM) immunohistochemical (IHC) expression and pathological findings of AKI and renal tubular regeneration (RTR) on H&E.Methods: We reviewed 23 autopsies performed in the clinical setting of AKI and RTR. VIM expression was scored in the renal cortical tubular epithelium using a statistical cutoff ≥ 3% for high expression and < 3% for low expression.Results: Of the 23 kidney tissues examined, seven (30.4%) had low VIM expression, and 16 (69.6%) had high VIM expression. Kidney tissues with evidence of AKI and RTR had significantly higher VIM expression. Renal peritubular microenvironment features showing regenerative changes on H&E were associated with high VIM expression. In the univariate model, kidney tissues with RTR were 18-fold more likely to have high VIM expression.Conclusions: In conclusion, our findings suggest that VIM could serve as an IHC marker for RTR following AKI. However, correlation with H&E findings remains critical to excluding chronic tubular damage. Collectively, our preliminary results pave the way for future studies including a larger sample size to validate the use of VIM as a reliable biomarker for RTR.
Silencing the cleavage factor CFIm25 as a new strategy to control Entamoeba histolytica parasite
Juan David Ospina-Villa,Nancy Guillén,Ce´sar Lo´pez-Camarillo,Jacqueline Soto-Sanchez,Esther Ramirez-Moreno,Raul Garcia-Vazquez,Carlos A. Castañon-Sanchez,Abigail Betanzos,Laurence A.Marchat 한국미생물학회 2017 The journal of microbiology Vol.55 No.10
The 25 kDa subunit of the Clevage Factor Im (CFIm25) is an essential factor for messenger RNA polyadenylation in human cells. Therefore, here we investigated whether the homologous protein of Entamoeba histolytica, the protozoan responsible for human amoebiasis, might be considered as a biochemical target for parasite control. Trophozoites were cultured with bacterial double-stranded RNA molecules targeting the EhCFIm25 gene, and inhibition of mRNA and protein expression was confirmed by RT-PCR and Western blot assays, respectively. EhCFIm25 silencing was associated with a significant acceleration of cell proliferation and cell death. Moreover, trophozoites appeared as larger and multinucleated cells. These morphological changes were accompanied by a reduced mobility, and erythrophagocytosis was significantly diminished. Lastly, the knockdown of EhCFIm25 affected the poly(A) site selection in two reporter genes and revealed that EhCFIm25 stimulates the utilization of downstream poly(A) sites in E. histolytica mRNA. Overall, our data confirm that targeting the polyadenylation process represents an interesting strategy for controlling parasites, including E. histolytica. To our best knowledge, the present study is the first to have revealed the relevance of the cleavage factor CFIm25 as a biochemical target in parasites.
Fuzzy Linguistic Recommender Systems for the Selective Diffusion of Information in Digital Libraries
( Carlos Porcel ),( Alberto Ching-lpez ),( Juan Bernabe-moreno ),( Alvaro Tejeda-lorente ),( Enrique Herrera-viedma ) 한국정보처리학회 2017 Journal of information processing systems Vol.13 No.4
The significant advances in information and communication technologies are changing the process of how information is accessed. The internet is a very important source of information and it influences the development of other media. Furthermore, the growth of digital content is a big problem for academic digital libraries, so that similar tools can be applied in this scope to provide users with access to the information. Given the importance of this, we have reviewed and analyzed several proposals that improve the processes of disseminating information in these university digital libraries and that promote access to information of interest. These proposals manage to adapt a user`s access to information according to his or her needs and preferences. As seen in the literature one of the techniques with the best results, is the application of recommender systems. These are tools whose objective is to evaluate and filter the vast amount of digital information that is accessible online in order to help users in their processes of accessing information. In particular, we are focused on the analysis of the fuzzy linguistic recommender systems (i.e., recommender systems that use fuzzy linguistic modeling tools to manage the user`s preferences and the uncertainty of the system in a qualitative way). Thus, in this work, we analyzed some proposals based on fuzzy linguistic recommender systems to help researchers, students, and teachers access resources of interest and thus, improve and complement the services provided by academic digital libraries.
Fuzzy Linguistic Recommender Systems for the Selective Diffusion of Information in Digital Libraries
Porcel, Carlos,Ching-Lopez, Alberto,Bernabe-Moreno, Juan,Tejeda-Lorente, Alvaro,Herrera-Viedma, Enrique Korea Information Processing Society 2017 Journal of information processing systems Vol.13 No.4
The significant advances in information and communication technologies are changing the process of how information is accessed. The internet is a very important source of information and it influences the development of other media. Furthermore, the growth of digital content is a big problem for academic digital libraries, so that similar tools can be applied in this scope to provide users with access to the information. Given the importance of this, we have reviewed and analyzed several proposals that improve the processes of disseminating information in these university digital libraries and that promote access to information of interest. These proposals manage to adapt a user's access to information according to his or her needs and preferences. As seen in the literature one of the techniques with the best results, is the application of recommender systems. These are tools whose objective is to evaluate and filter the vast amount of digital information that is accessible online in order to help users in their processes of accessing information. In particular, we are focused on the analysis of the fuzzy linguistic recommender systems (i.e., recommender systems that use fuzzy linguistic modeling tools to manage the user's preferences and the uncertainty of the system in a qualitative way). Thus, in this work, we analyzed some proposals based on fuzzy linguistic recommender systems to help researchers, students, and teachers access resources of interest and thus, improve and complement the services provided by academic digital libraries.
Fluorescence Guided Surgery with 5-Aminolevulinic Acid for Resection of Spinal Cord Ependymomas
Rafael García Moreno,Luis Miguel Bernal García,Hyaissa Ippolito Bastidas,Carlos Andrés Mondragón Tirado,Aurora Moreno Flores,Juan Pablo Sosa Cabezas,José Manuel Cabezudo Artero 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.1
Study Design: A retrospective study. Purpose: We report our experience with 5-aminolevulinic acid (5-ALA)–assisted resection of spinal cord ependymomas in adults. Overview of Literature: Ependymoma is the most frequent primary spinal cord tumor in adults. Surgery is the treatment of choice in most cases. However, while complete resection is achieved in approximately 80% of cases, clinical improvement is achieved in 15% only. Five-ALA fluorescence–guided surgery seems to be useful for this tumor type. Methods: We studied 14 patients undergoing 5-ALA fluorescence-guided surgery for spinal cord ependymomas in our service. The modified McCormick classification was used to determine clinical status and the degree of resection was assessed with magnetic resonance imaging. Results: Of the 14 patients, the tumor showed an intense emission of fluorescence in 12 and the fluorescence was weak and nonuniform in two. Complete resection was achieved in 11 cases. According to the McCormick classification, 10 patients improved, two remained the same, and two deteriorated. Conclusions: Our results confirm that 5-ALA fluorescence-guided resection is useful in spinal cord ependymoma resection. Although the rate of complete resections is similar to that in published series without 5-ALA, clinical results are better when using 5-ALA with a lower percentage of clinical deterioration.
( Edoardo Torres-guerrero ),( Elisa Crystal Sanchez-moreno ),( Carlos Enrique Atoche-dieguez ),( Erika Margarita Carrillo-casas ),( Roberto Arenas ),( Juan Xicohtencatl-cortes ),( Rigoberto Hernandez- 대한피부과학회 2018 Annals of Dermatology Vol.30 No.5
Background: The causative agents of leprosy are the well-known Mycobacterium leprae and the newly discovered Mycobacterium lepromatosis. This agent was found in 2008, and it was found to be the cause of diffuse lepromatous leprosy in two Mexican patients. Objective: The objective of this work was to determine if M. leprae and M. lepromatosis were present in formalin-fixed and paraffin- embedded skin samples from cases from different regions in Mexico. Methods: A total of 41 skin samples were obtained from 11 states of Mexico. All patients’ samples were diagnosed by clinical and histopathological analyses. Total DNA was isolated using a Qiagen-DNeasy blood and tissue kit and molecular identification was achieved by two semi-nested polymerase chain reactions. Results: The 41 patient included 33 samples from men and 8 samples from women; 29 samples were polymerase chain reaction (PCR)-positive to Mycobacterium and 12 samples were PCR-negative. From those 29 samples, 13 were PCR-positive to M. leprae, 8 to M. lepromatosis and 8 were positive to both species. The histopathological diagnosis included; Nodular lepromatous leprosy (NLL); Diffuse lepromatous leprosy (DLL); and Borderline leprosy (BL). The 29 PCR-positive samples were classified as follow: 14 NLL, 4 DLL, and 11 BL. In the 12 samples negative to Mycobacterium, 7 showed the NLL, 2 DLL and 3 BL. Conclusion: These findings add evidence to the M. leprae and M. lepromatous distribution, clinical forms and participation of dual infections in Mexico. (Ann Dermatol 30(5) 562∼565, 2018)
Structural and optical characterization of InGaN/GaN quantum wells grown in cubic phase by MBE
Luis Faustino MEJIA-CUELLAR,Yenny Lucero CASALLAS-MORENO,Alberto PIEDRA-LORENZANA,Carlos Alberto HERNANDEZ-GUTIE,Dagoberto CARDONA,Saul ARIAS-CERON,Juan HERNANDEZ-ROSAS,Jose Luis HERRERA-PEREZ,Emmanue 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8
Gonzalo Gurrea,Vicente Blanca-Giménez,Vicente Pérez,María-Antonia Serrano,Juan-Carlos Moreno,Solar Radiation Group of the Universitat Politècnica de València 한국기상학회 2018 Asia-Pacific Journal of Atmospheric Sciences Vol.54 No.4
The goal of this study was to statistically analyse the variability of global irradiance and ultraviolet erythemal (UVER) irradiance and their interrelationships with global and UVER irradiance, global clearness indices and ozone. A prediction of short-term UVER solar irradiance values was also obtained. Extreme values of UVER irradiance were included in the data set, as well as a time series of ultraviolet irradiance variability (UIV). The study period was from 2005 to 2014 and approximately 250,000 readings were taken at 5-min intervals. The effect of the clearness indices on global irradiance variability (GIV) and UIV was also recorded and bi-dimensional distributions were used to gather information on the two measured variables. With regard to daily GIVand UIV, it is also shown that for global clearness index (kt) values lower than 0.6 both global and UVER irradiance had greater variability and that UIVon cloud-free days (kt higher than 0.65) exceeds GIV. To study the dependence between UIVand GIV the χ2 statistical method was used. It can be concluded that there is a 95% probability of a clear dependency between the variabilities.A connection between high kt (corresponding to cloudless days) and low variabilities was found in the analysis of bidimensional distributions. Extreme values of UVER irradiance were also analyzed and it was possible to calculate the probable future values of UVER irradiance by extrapolating the values of the adjustment curve obtained from the Gumbel distribution.