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1.
Artigo em Inglês | MEDLINE | ID: mdl-38972389

RESUMO

BACKGROUND AND OBJECTIVE: Trigeminal Neuralgia (NT) is a common pathology in Neurosurgery. It can be classified as idiopathic or secondary to other pathologies, such as Multiple Sclerosis (MS). Several surgical treatments have been described, some of them being replaced by more modern techniques. Partial sensory rhizotomy (PSR), described by Dandy is a technique replaced by other techniques due to its permanent side effects. We present our experience with this technique in patients with recurrent NT. METHODS AND MATERIALS: A retrospective review is carried out on six patients who underwent surgery at our center from 2018 to 2023 using the PSR technique. RESULTS: All the patients intervened showed significant clinical improvement, except one patient who required reintervention due to uncontrolled pain. According to the Barrow Neurological Institute (BNI) scale, 80% (4/5) of patients showed improvement from grade V to grades I/II except for one of them. This patient suffered from MS. Additionally, one patient presented a corneal ulcer after surgery due to impairment of the corneal reflex. CONCLUSION: In our experience, PSR is a valid treatment option in selected patients with recurrent TN. It has a low incidence of complications with an adequate surgical technique and anatomical knowledge of the region. To the best of our knowledge, we are one of the few centers in Spain to publish our results with PSR in the last ten years. In our study, we report good results in pain control withdrawing medication in 67% (4/6) of the operated patients.

2.
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1536244

RESUMO

El análisis de sentimientos o minería de opiniones es una rama de la computación que permite analizar opiniones, sentimientos y emociones en ciertas áreas de interés social como productos, servicios, organizaciones, compañías, eventos y temas de interés actual. En tal sentido se propuso identificar los sentimientos y tópicos presentes en los tweets que hicieron mención a las vacunas cubanas Soberana 02 y Abdala en la red social Twitter. Se optó por los lenguajes de programación Python y R con sus librerías específicas para la ciencia de datos. La primera parte del estudio, que abarcó desde el web scraping hasta la cuantificación de las palabras más usadas, se realizó con Python y las siguientes librerías: tweepy, pandas, re, nltk y matplotlib. Mientras que la segunda, que fue la del análisis de sentimientos y detección de tópicos, se implementó con R y se utilizó: tokenizers, tm, syuzhet, topic modeling, tidyverse, barplot y wordcloud. Se obtuvo que entre los términos con que más se dialoga en Twitter están dosis, vacunas, eficacia, cubanos, candidatos, millones, país, personas, recibido y población. En los tweets las emociones predominantes fueron el miedo y, ligeramente por encima, la confianza; en la polaridad predominó la positiva, como expresión del contexto vivido en el cual se desarrolló la campaña de vacunación. A partir de los tópicos identificados y los términos que se relacionaron con las emociones predominantes, así como por la polaridad, se aprecia consenso en torno a las vacunas Soberana 02 y Abdala.


Sentiment analysis or opinion mining is a branch of computing that allows analyzing opinions, feelings and emotions in certain areas of social interest such as products, services, organizations, companies, events and topics of current interest. In this sense, the objective of this paper was to identify the feelings and topics present in the tweets mentioning the Cuban vaccines Soberana 02 and Abdala on Twitter social network. The programming languages Python and R with their specific libraries for data science were chosen. The first part of the study, which ranged from web scraping to the quantification of the most used words, was carried out with Python and the libraries tweepy, pandas, re, nltk and matplotlib. While the second, which was the sentiment analysis and topic detection, was implemented with R and used tokenizers, tm, syuzhet, topic modeling, tidyverse, barplot, and wordcloud. It was obtained that among the terms with which there is more dialogue on Twitter are doses, vaccines, efficacy, Cubans, candidates, millions, country, people, received and population. In the tweets, the predominant emotions were fear and confidence, slightly above it; in the polarity, the positive one predominated, as an expression of the lived context in which the vaccination campaign was developed. A consensus can be perceived around the vaccines Soberana 02 and Abdala, from the identified topics and the terms that were related to the predominant emotions, as well as the polarity.

3.
Rev. cienc. med. Pinar Rio ; 26(3): e5224, mayo.-jun. 2022. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1407865

RESUMO

RESUMEN Introducción: los resultados visuales de la cirugía de catarata en pacientes con uveítis son menos predecibles. Objetivo: analizar los resultados visuales de pacientes con uveítis operados de catarata en la provincia de Pinar del Río entre enero de 2018 y agosto de 2020. Métodos: se realizó un estudio observacional, analítico de cohorte en el Hospital General Docente "Abel Santamaría Cuadrado" de la provincia de Pinar del Río. El universo estuvo constituido por pacientes con uveítis que asistieron a la consulta de infecciones e inflamaciones oculares y recibieron cirugía de catarata; la muestra quedó conformada por 42 ojos de 42 pacientes. Para el análisis estadístico se empleó Chi cuadrado de independencia, probabilidad exacta de Fisher y riesgo relativo con su intervalo de confianza; se utilizó una significación estadística del 95 %. Resultados: el 83,3 % de los ojos logró una agudeza visual final superior a 0,3. El resultado visual no mostró diferencias según grupos de edades (p=0,679), sexo (p=0,690), color de la piel (p=1,000), zona de residencia (p=1,000) y agudeza visual preoperatoria (p=0,569). Hubo diferencias significativas según clasificación anatómica (p<0,001), técnica quirúrgica (p=0,011) y complicaciones intraoperatorias (p=0,002). El resultado visual y las complicaciones posoperatorias no mostraron asociación. Conclusión: la cirugía de catarata en pacientes con uveítis logra una evidente mejoría en la agudeza visual final; los resultados son favorables en casos de uveítis anterior, tratados con facoemulsificación y ausencia de complicaciones intraoperatorias.


ABSTRACT Introduction: the visual results of cataract surgery in patients with uveitis are less predictable. Objective: to analyze the visual outcomes of patients with uveitis operated on cataract in Pinar del Rio province between January 2018 and August 2020. Methods: an observational, analytical cohort study was conducted at Abel Santamaria Cuadrado General Teaching Hospital in Pinar del Rio province. The target group comprised the patients with uveitis who attended the ocular infections and inflammations consultation and who underwent cataract surgery; the sample included 42 eyes of 42 patients. For the statistical analysis we used Chi-square of independence, Fisher's exact probability and relative risk with its confidence interval; a statistical significance of 95 % was used. Results: the eyes achieved a final visual acuity higher than 0.3 (83,3 %). Visual outcome showed no differences according to age group (p=0,679), sex (p=0,690), skin color (p=1,000), area of residence (p=1,000) and preoperative visual acuity (p=0,569). There were significant differences according to anatomical classification (p<0,001), surgical technique (p=0,011) and intraoperative complications (p=0,002). Visual outcome and postoperative complications showed no association. Conclusion: cataract surgery in patients with uveitis achieves an evident improvement in final visual acuity; results are favorable in cases of anterior uveitis, treated with phacoemulsification and absence of intraoperative complications.

4.
Rev. cienc. med. Pinar Rio ; 24(5): e4459, sept.-oct. 2020. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1144295

RESUMO

RESUMEN Introducción: los efectos de la iridotomía periférica láser están demostrados, sin embargo, no siempre logra controlar la presión intraocular ni la progresión de la enfermedad por cierre angular primario. Objetivo: analizar los factores que influyen en la progresión de la enfermedad por cierre angular primario de pacientes pinareños tratados con iridotomía periférica láser. Método: se realizó un estudio analítico de cohorte retrospectivo en el servicio de Oftalmología del Hospital General Docente Abel Santamaría, de Pinar del Río, durante el año 2019. El universo estuvo constituido por pacientes con diagnóstico de enfermedad por cierre angular primario tratados con iridotomía periférica láser. La muestra final quedó integrada por 223 ojos de 123 pacientes. El análisis estadístico se realizó con el programa SPSS. Resultados: el 20,6 % de la muestra experimentó progresión de la enfermedad, lo que se relacionó de forma significativa con la forma clínica (p<0,001), la edad (p=0,012), la amplitud de la cámara anterior (p<0,001), el cierre angular residual (p<0,001), la presión intraocular (p<0,001) y la medicación hipotensora (p<0,001). No arrojó diferencias significativas el sexo (p=0,427), el color de la piel (p=0,741) y la longitud axial (p=0,549). Conclusión: los factores que influyen en la progresión de la enfermedad por cierre angular primario de los pacientes pinareños tratados con iridotomía periférica láser estudiados fueron la forma clínica, menor amplitud de la cámara anterior, presencia de cierre angular residual y presión intraocular superior a 18 mmHg con uso de mayor número de colirios hipotensores oculares.


ABSTRACT Introduction: the effects of Laser peripheral iridotomy have been demonstrated; however it does not always manage to control intraocular pressure or the progression of the disease by primary angular closure. Objective: to analyze the factors influencing the disease progression by primary angular closure in Pinar del Rio patients treated with Laser peripheral iridotomy. Methods: a retrospective analytical cohort study was carried out in the Ophthalmology Service at Abel Santamaria Cuadrado General Teaching Hospital in Pinar del Río, during 2019. The target group comprised the patients diagnosed with primary angular closure disease treated with Laser peripheral iridotomy and the final sample consisted of 223 eyes from 123 patients. The statistical analysis was performed with the SPSS program. Results: of the sample (20,6 %) experienced disease progression, which was significantly related to the clinical form (p<0,001), age (p=0,012), anterior chamber amplitude (p<0,001), residual angular closure (p<0,001), intraocular pressure (p<0,001) and hypotensive medication (p<0,001). Sex (p=0,427), skin color (p=0,741) and axial length (p=0,549) did not show significant differences. Conclusions: factors influencing on the progression of the disease by primary angular closure in Pinar del Rio patients who were treated with Laser peripheral iridotomy were: the clinical form, lower anterior chamber amplitude, presence of residual angular closure and intraocular pressure higher than 18 mmHg with the use of more ocular hypotensive eye drops.

5.
Rev. cienc. med. Pinar Rio ; 23(5): 758-771, sept.-oct. 2019. graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1092839

RESUMO

RESUMEN Introducción: la cirugía del cristalino se considera uno de los métodos quirúrgicos más seguros a nivel mundial. Objetivo: describir las consideraciones quirúrgicas a tener en cuenta para lograr el éxito de la facoemulsificación del cristalino en pacientes con cierre angular primario en el Hospital General Docente "Abel Santamaría Cuadrado" de Pinar del Río. Métodos: se realizó una búsqueda de los principales artículos científicos de los últimos años, así como de la literatura impresa que incluye el tema, siendo seleccionados los contenidos más relevantes para la confección del informe final. Desarrollo: la extracción del cristalino constituye un reto quirúrgico en pacientes con cierre angular primario por las peculiaridades anatómicas, variaciones de la presión intraocular y alteraciones del segmento anterior asociadas. Conclusiones: un detallado examen preoperatorio, una adecuada técnica quirúrgica realizada por un cirujano hábil puede reducir el índice de complicaciones y lograr total éxito.


ABSTRACT Introduction: crystalline lens surgery is considered one of the safest surgical methods in the world. Objective: to describe the surgical considerations to be taken into account to achieve the success of phacoemulsification of the crystalline lens in patients with primary angular closure at Abel Santamaría Cuadrado General Teaching Hospital in Pinar del Río. Methods: literature searching was conducted concerning the main scientific articles of the last years, as well as the printed literature that includes the topic, choosing the most relevant contents for the writing of the final report. Development: the removal of the crystalline constitutes a surgical challenge in patients with primary angular closure due to anatomical peculiarities, intraocular pressure variations and associated alterations of the anterior segment. Conclusions: a detailed preoperative examination, and the adequate surgical technique performed by a skilled surgeon can reduce the rate of complications and achieve total success.

6.
Rev. cienc. med. Pinar Rio ; 23(4): 523-532, jul.-ago. 2019. tab
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1092811

RESUMO

RESUMEN Introducción: la clínica del cierre angular primario puede variar desde una sospecha de la enfermedad hasta estadios avanzados del daño glaucomatoso, lo que puede provocar ceguera. Objetivo: describir la epidemiología del cierre angular primario en pacientes pinareños, una vez identificadas las variables sociodemográficas y oculares que determinan su forma clínica. Métodos: se realizó un estudio descriptivo transversal en Pinar del Río, en los años 2013 y 2017, el universo estuvo constituidos por 293 casos nuevos con diagnóstico de cierre angular primario en cualquiera de sus formas clínicas. El análisis estadístico se realizó con el programa SPSS. Resultados: la edad media fue 57,69 ± 7,35 años; predominaron las mujeres (89,5 %) y el 77,2 % evidenció una situación de estrés. Los valores promedio de longitud axial y amplitud de cámara anterior fueron 21,89 ± 0,49 mm y 2,65 ± 0,27 mm. El 87,03 % de los ojos mostró ángulo estrecho. La media de la presión intraocular basal fue de 23,86 ± 5,81. Al analizar las variables sociodemográficas y oculares en relación a la forma clínica, se encontró que los factores que la determinan fueron: edad (p<0,001), amplitud angular (p<0,001), sinequias anteriores periféricas (p<0,001) y presión intraocular (p<0,001). El análisis de regresión lineal confirmó estos resultados. Conclusión: el cierre angular primario es frecuente en mujeres de mediana edad sometidas a estrés; con ojos pequeños, ángulo camerular y cámara anterior estrecha. La edad, amplitud angular, sinequias anteriores periféricas y presión intraocular basal, determinan la forma clínica de la enfermedad.


ABSTRACT Introduction: the clinic behavior of primary angular closure can range from suspected disease to advanced stages of glaucomatous damage, which can lead to blindness. Objective: to describe the epidemiology of primary angular closure in Pinar del Río patients by identifying the socio-demographic and ocular variables that determine its clinical type. Methods: a cross-sectional descriptive study was performed in Pinar del Río from 2013 to 2017. The target group consisted of 293 new cases with a diagnosis of primary angular closure in any of its clinical types. The statistical analysis was performed with the SPSS program. Results: mean age was 57.69 ± 7.35 years; women predominated (89.5 %) and 77.2 % evidenced a stressful situation. The average values of axial length and anterior chamber width were 21.89 ± 0.49 mm and 2.65 ± 0.27 mm. 87.03 % of the eyes showed a narrow angle. The mean basal intraocular pressure was 23.86 ± 5.81. When analyzing the socio-demographic and ocular variables in relation to the clinical type, it was found that the factors that determine its onset were: age (p<0.001), angular amplitude (p<0.001), peripheral anterior synechia (p<0.001) and intraocular pressure (p<0.001). Linear regression analysis confirmed these results. Conclusion: primary angular closure is common in middle-aged women under stress; with small eyes, camerular angle and narrow anterior chamber. Age, angular amplitude, peripheral anterior synechiae, and basal intraocular pressure determine the clinical type of the disease.

7.
Artigo em Espanhol | CUMED | ID: cum-51684

RESUMO

Se realizó un estudio descriptivo transversal sobre las condicionantes y los hábitos de prescripción de medicamentos en un consultorio de la atención primaria de salud pertenecientes al área de la Policlínica Manuel Díaz Legra del municipio Holguín, con el objetivo de caracterizar la prescripción de benzodiazepinas en adultos mayores. Un total de 17 pacientes 15,17 por ciento consumían o habían consumido benzodiazepinas tres meses antes de la investigación, de ellos 11 64,70 por ciento estaban incluidos en el grupo de 60 a 74 años. Predominó el sexo femenino,13 76,47 por ciento.Aproximadamente, la mitad de los pacientes no tenían pareja y su nivel educacional era de enseñanza primaria y 14 82,35 por ciento refirieron consumir café. El clorodiazepóxido y el nitrazepam fueron los únicos medicamentos empleados, el primero fue el de mayor uso con 13 pacientes 76,47 por ciento, la indicación en 11 pacientes 64,70 por ciento fue por ansiedad. Hubo empleo intermitente y de larga duración de estos medicamentos. El médico de familia fue el profesional que más las indicó 12 para el 70,58 por ciento. El insomnio fue la causa de la solicitud del nitrazepam en todos los casos. Predominó la prescripción irracional. Se requiere de un cambio en la prescripción de medicamentos que contribuya a mejorar su calidad y su uso racional, así como fomentar el uso responsable de éstos por parte de la población, especialmente, la geriátrica(AU)...


A descriptive and cross-sectional study at a Family Office of Primary Care of Manuel Díaz Legra health area was carried out on the conditions of the prescription habits. The objective of this study was to characterize the benzodiazepines prescription in elderly patients. A total of 17 patients 15.17 percent consumed or had consumed benzodiazepines three months before the study was done, 11 of them 64.70 percent were included in the group from 60 to 74 years. The female sex prevailed, 13 76.47 percent. Approximately half of the patients does not have couple and their educational level was of primary education and 14 of them 82.35 percent consumed coffee. Chlordiazepoxide and Nitrazepam were the only medications used; the first one was the most used medication with 13 patients 76.47 percent. Prescription for anxiety was the prevailing one reprersented by 11 patients 64.70 percent. There was intermittent prescription and of long duration. The Family Doctor was the one that prescribed more benzodiazepines 12 70.58 percent. The insomnia was the cause of nitrazepam giving in all cases. The irrational prescription prevailed .The authors considered that it was necessary to change the prescription of medications in order to improve its rational use, as well as, to foster the responsibility value in the population, especially the elderly people(AU)...


Assuntos
Humanos , Idoso , Benzodiazepinas , Idoso , Prescrições de Medicamentos
8.
Artigo em Espanhol | CUMED | ID: cum-41051

RESUMO

Para evaluar el consumo de medicamentos del grupo de las benzodiacepinas por la población, especialmente los adultos mayores en la atención primaria de salud, se realizó un estudio descriptivo transversal de tipo prescripción-indicación en la Farmacia Principal No 2 del municipio Holguín, en el trimestre comprendido entre enero-marzo de 2007, con el objetivo de identificar el uso de estos fármacos en una muestra de 239 pacientes. Con la información obtenida se confeccionó una base de datos, los cuales se procesaron de forma automatizada, mediante las técnicas descriptivas para variables discretas, los resultados se expresan en porcentaje y en tablas. La prescripción de benzodiacepinas predominó en las edades comprendidas entre 60-74 años y en el sexo femenino. La ansiedad es la principal indicación de benzodiacepinas y el nitrazepam el fármaco más indicado. Se evaluó como irracional e excesiva la prescripción de todos los fármacos estudiados...(AU)


A descriptive and cross-sectional study was carried out aimed at assessing the consumption of benzodiazepines in elderly in primary care from January to March 2007. The sample was constituted by 239 patients. A data base was done which were processed through descriptive techniques for discreet variables. The results were expressed in percentage and tables. Benzodiacepines prescription prevailed in the age group between 60-74 years as well as the female sex. Benzodiacepines were used mainly for anxiety and nitrazepam was the most useful drug. The prescription of all drugs was considered irrational and excessive...(AU)


Assuntos
Humanos , Idoso , Atenção Primária à Saúde , Benzodiazepinas , Prescrições de Medicamentos
9.
Artigo em Espanhol | CUMED | ID: cum-40822

RESUMO

Se realizó un estudio de revisión con el objetivo de evaluar el uso de benzodiacepinas en el adulto mayor. Fue evidente que la prescripción de las mismas constituye un problema médico - social debido a su uso irracional y excesivo, por lo que se hace necesario ejecutar acciones que contribuyan al uso correcto de medicamentos para mejorar la calidad de vida del paciente geriátrico, así como disminuir los costos en nuestros servicios de salud. Se incluyó una propuesta de estrategia sustentada en tres objetivos incorporar y sostener los conocimientos relacionados con la farmacología geriátrica, promocionar el uso racional de medicamentos, así como ejecutar el control sobre los prescriptores...(AU)


A review study aimed at assessing the use of benzodiazepines in elderly was carried out. The prescriptions constituted a socio-medical problem due to the excessive irrational use of this medication. Therefore different actions were developed in order to use this medication correctly to improve the elderly`s quality of life. A set of strategies was included based on three objectives including and maintaining the knowledge regarding geriatric pharmacology; promoting the rational use of medications as well as to control the medication prescribing...(AU)


Assuntos
Idoso , Benzodiazepinas , Prescrições de Medicamentos
10.
Electromagn Biol Med ; 27(2): 173-84, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18568935

RESUMO

Influence of pre-sowing magnetic treatments on plant growth and final yield of lettuce (cv. Black Seeded Simpson) were studied under organoponic conditions. Lettuce seeds were exposed to full-wave rectified sinusoidal non uniform magnetic fields (MFs) induced by an electromagnet at 120 mT (rms) for 3 min, 160 mT (rms) for 1 min, and 160 mT (rms) for 5 min. Non treated seeds were considered as controls. Plants were grown in experimental stonemasons (25.2 m(2)) of an organoponic and cultivated according to standard agricultural practices. During nursery and vegetative growth stages, samples were collected at regular intervals for growth analyses. At physiological maturity, the plants were harvested from each stonemason and the final yield and yield parameters were determined. In the nursery stage, the magnetic treatments induced a significant increase of root length and shoot height in plants derived from magnetically treated seeds. In the vegetative stage, the relative growth rates of plants derived from magnetically exposed seeds were greater than those shown by the control plants. At maturity stage, all magnetic treatments increased significantly (p < 0.05)--plant height, leaf area per plant, final yield per area, and fresh mass per plant--in comparison with the controls. Pre-sowing magnetic treatments would enhance the growth and final yield of lettuce crop.


Assuntos
Proliferação de Células/efeitos da radiação , Sobrevivência Celular/efeitos da radiação , Campos Eletromagnéticos , Lactuca/fisiologia , Lactuca/efeitos da radiação , Relação Dose-Resposta à Radiação , Doses de Radiação
11.
Integr Psychol Behav Sci ; 42(2): 187-93, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-18176834

RESUMO

Intersubjectivity and consciousness are reinterpreted according to the dynamic and relational coordinates of lived experience. Consciousness is not just another property of the subject, but rather the condition itself of his/her own being-in-the-world. The different aspects of consciousness are the moments and movements which constitute its intentional structure. These structures lead us to reinterpret material embodiment, temporality, and intersubjectivity as the "complex" steps taken by consciousness, which in its movements does not turn inward, on itself like a transcendental, reasoning, and self-centred consciousness, but, on the contrary, as an embodied consciousness immersed in others and in the world.


Assuntos
Cognição , Estado de Consciência , Intenção , Modelos Psicológicos , Atenção/fisiologia , Conscientização , Encéfalo/fisiologia , Cognição/fisiologia , Compreensão , Estado de Consciência/fisiologia , Humanos , Modelos Neurológicos , Apego ao Objeto , Psicologia do Self
12.
Artigo em Espanhol | CUMED | ID: cum-37057

RESUMO

Aparejado al envejecimiento poblacional se incrementa el consumo de fármacos en la población La terapéutica farmacológica de los ancianos continúa planteando importantes dificultades la principal es la indefinición del sujeto al existir una diversidad de características que condicionan que se dé una variabilidad individual Esto impide generalizar conceptos y dificulta la extrapolación de los datos obtenidos en grupos de población reducidos y concretos En el presente trabajo de revisión se exponen algunos aspectos farmacogerontológicos para lograr una adecuada prescripción en el adulto mayor...(AU)


Together with the population aging the drugs consumption are increased There are difficulties related with pharmacological therapy in elderly The main difficulty is the one which is close related with different characteristics of the individuals Therefore is very difficult for specialists to prescribe medication according to elderly characteristics In this review article some pharmaco gerontologic aspects were discussed to achieve an appropriate prescription in elderly...(AU)


Assuntos
Humanos , Masculino , Feminino , Idoso , Idoso de 80 Anos ou mais , Idoso , Farmacocinética , Envelhecimento , Prescrições de Medicamentos
13.
J Infect Dis ; 191(11): 1961-70, 2005 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-15871131

RESUMO

BACKGROUND: This work evaluates the role of subtype F human immunodeficiency virus type 1 (HIV-1) protease (PR) substitutions L89M and L90M in viral replication and resistance to PR inhibitors (PIs). METHODS: Subtype B and F PR genes were subjected to site-directed mutagenesis, to create and reverse the methionine at positions 89 and 90. Viruses were re-created in cell culture, and their replicative capacity was assessed by fitness assay. Generated viruses were also phenotyped for PI resistance. RESULTS: The subtype F clone (89M90L) showed a replicative capacity comparable to that of the PI-susceptible subtype B clone (89L90L) and was more fit than the L89M mutated subtype B clone (89M90L). Both 89M90M subtype B and F clones presented the lowest fitness s values. The L89M mutation impacted phenotypic resistance to all PIs in half of the subtype F isolates but not in the subtype B isolates. Subtype F isolates presented a phenotypic profile similar to that of subtype B isolates when the M89L mutation was introduced. CONCLUSION: The L89M mutation in subtype F viruses is a high genetic barrier to the accumulation of the L90M resistance mutation and can function as a resistance mutation, depending on the presence of other polymorphisms in the subtype F PR backbone.


Assuntos
Farmacorresistência Viral/genética , Inibidores da Protease de HIV/farmacologia , Protease de HIV/genética , HIV-1/efeitos dos fármacos , HIV-1/genética , Polimorfismo Genético , Sequência de Aminoácidos , Animais , Linhagem Celular , Sequência Consenso , Genótipo , Protease de HIV/química , Dados de Sequência Molecular , Fatores de Tempo
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