RESUMEN
PURPOSE: While it is common for menstrual cycles to cease within the initial 6 months of treatment, there are instances where some transgender men may not experience this cessation. We analyzed transgender men undergoing gender-affirming hormone therapy (GAHT) with testosterone who experienced breakthrough bleeding in order to identify the factors associated with this condition. METHODS: In this case-control study, 24 transgender men in the case group and 48 in the control group were assessed for clinical, sociodemographic, hormonal, and body composition variables using dual-energy X-ray absorptiometry. All participants had been on GATH for at least 6 months. RESULTS: A few transgender men experienced persistent breakthrough bleeding, which was associated with decreased testosterone levels and free androgen index (FAI) compared with controls (p = 0.002 and p = 0.008, respectively). Among individuals with breakthrough bleeding, 50% had testosterone levels below the lowest tertile calculated for the sample, compared with 18.8% on controls (p = 0.007). After therapy adjustment, testosterone levels increased compared with the values obtained in the initial bleeding episode (p = 0.031). Eight transgender men required the addition of an oral progestogen to achieve amenorrhea, and these individuals had higher BMI than those in whom the adjustment of the parenteral testosterone dose was adequate (p = 0.026). A univariate prevalence ratio analysis revealed a negative association of persistent bleeding with testosterone levels (p = 0.028) and FAI levels (p = 0.019). CONCLUSION: Higher BMI and lower levels of testosterone and FAI were the main factors associated with breakthrough bleeding in transgender men.
Asunto(s)
Terapia de Reemplazo de Hormonas , Testosterona , Personas Transgénero , Humanos , Masculino , Femenino , Adulto , Testosterona/efectos adversos , Testosterona/administración & dosificación , Testosterona/sangre , Estudios de Casos y Controles , Terapia de Reemplazo de Hormonas/métodos , Terapia de Reemplazo de Hormonas/efectos adversos , Hemorragia Uterina/inducido químicamente , Hemorragia Uterina/epidemiología , Procedimientos de Reasignación de Sexo/efectos adversos , Procedimientos de Reasignación de Sexo/métodos , Transexualidad/tratamiento farmacológico , Transexualidad/sangre , Adulto Joven , Andrógenos/efectos adversos , Andrógenos/administración & dosificación , Persona de Mediana EdadRESUMEN
BACKGROUND: The conjugated linoleic acid (CLA) isomer cis-9, trans-11 is an anticarcinogen that inhibits cell proliferation and/or induces apoptosis of tumor cells. The objective of this study was to evaluate the expression of genes responsible for cell cycle regulation and apoptosis in tumor explants of mammary anaplastic carcinoma (AC) and mammary tubulopapillary carcinoma (TC) cultured in vitro with the CLA isomers cis-9, trans-11 and trans-10, cis-12. METHODS: In this study we used mammary explants from two adult female dogs that revealed two types of malignant tumors: (a) anaplastic mammary carcinoma (AC) and (b) mammary tubulopapillary carcinoma (TC). The explants (n = 6 per treatment) had an average weight of 80.0 ± 2.0 mg and were cultured for 24 h in 35 mm culture plates under the following treatments: (a) Control: Culture medium + fatty acid free bovine serum albumin (BSA); (b) Culture medium + cis-9, trans-11 CLA (75 µM) diluted with fatty acid free bovine serum albumin (BSA), and; (c) Culture medium + trans-10, cis-12 CLA (75 µM) diluted with fatty acid free bovine serum albumin (BSA). After that, total RNA was extracted, complementary DNA was synthesized (cDNA), and quantitative analysis by real-time polymerase chain reaction (RT-qPCR) was conducted. Data were analyzed using the MIXED procedure of SAS. RESULTS: Compared with the Control, the CLA trans-10, cis-12 treatment decreased expression of the gene encoding the p53 by 20% (P = 0.02), Caspase-3 by 25% (P = 0.06) and Bax by 51% (P = 0.001) in AC. The CLA cis-9, trans-11 increased the gene expression of proapoptotic protein Bax in TC by 68% (P = 0.01), but increased the expression of the antiapoptotic Bcl2 gene in AC by 72% (P = 0.006). CONCLUSION: The CLA cis-9, trans-11 stimulates apoptotic genes in mammary tubulopapillary carcinoma, but has a contrary effect on the anaplastic carcinoma, and the CLA trans-10, cis-12 stimulates cell cycle progression genes and may have an antiapoptotic effect, mainly in mammary anaplastic carcinoma.
Asunto(s)
Carcinoma , Ácidos Linoleicos Conjugados , Femenino , Perros , Animales , Ácidos Linoleicos Conjugados/farmacología , Albúmina Sérica Bovina , Proteína X Asociada a bcl-2 , División CelularRESUMEN
The two-spotted spider mite, Tetranychus urticae Koch, is commonly found on strawberry crops (Fragaria x ananassa). Strawberry plants have defensive mechanisms, which in turn influence the behavior of herbivores. The oviposition and development of the two-spotted spider mite were evaluated on the leaf disks of the cultivars 'Aromas,' 'Camarosa,' 'Camino Real,' 'Diamante,' 'Diamante 10,' 'Diamante 50,' 'Festival,' and 'Seascape.' It was observed that on cultivars such as 'Aromas,' 'Camarosa,' and 'Seascape,' immature survivorship was higher, but no difference was found during the developmental period from egg to adult of T. urticae. The immature development time was also longer on 'Camarosa.' Females laid more eggs on 'Seascape' (8.4 eggs/day), and the least on 'Camarosa' (1.0 egg/day). Mortality was higher at the larval stage and reached more than 50% in three cultivars 'Camarosa,' 'Diamante,' and 'Seascape.' Thus, the cultivars 'Camarosa,' 'Diamante,' and 'Seascape' were the ones that mostly affected the survival, development, and reproduction of T. urticae.
Asunto(s)
Fragaria , Herbivoria , Oviposición , Tetranychidae , Animales , Femenino , Larva , Dinámica Poblacional , ReproducciónRESUMEN
Cultivation of temperate-climate fruits is economically important for Brazil. Grapholita molesta Busck is a pest that causes damage to apples, peaches, plums, and pears growing in different micro-regions of southern Brazil, and understanding its reproductive behavior is essential to develop control strategies. The objective of this study was to ascertain the influence of different temperatures (13, 16, 19, 22, and 25ºC) on the oviposition behavior of G. molesta. Females of G. molesta were placed in individual plastic containers, and the pre-oviposition period and the number of eggs laid were assessed until adult death. Temperature influenced the pre-oviposition period, and females kept at 22º were the first to lay their eggs. Oviposition occurred over a longer period of time at 13ºC than at the higher temperatures. The highest total number of eggs was obtained at 19ºC, with the mean daily oviposition being directly proportional to the temperature. There was a negative interaction between the pre-oviposition period and the total number of eggs laid by females. The most suitable temperature for oviposition of G. molesta was 19ºC.
Asunto(s)
Lepidópteros/anatomía & histología , Oviposición , Animales , Conducta Animal/fisiología , Oviposición/fisiología , TemperaturaRESUMEN
A fast agglutination screening test (FAST) for the detection of anti-Leishmania antibodies in serum samples from dogs with visceral leishmaniosis was developed. The test is based on the direct agglutination test (DAT), but combines a higher parasite concentration with a smaller test volume. In contrast to the DAT, the FAST makes use of only one serum dilution and the results can be read within 3 h as opposed to 18-20 h for the DAT. The FAST was evaluated using serum samples of confirmed cases of the disease and healthy controls collected in the most important endemic regions of canine visceral leishmaniosis, import cases of canine leishmaniosis in a non-endemic country, from non-endemic healthy controls and from dogs with other diseases. The performance of the FAST was compared with standard DAT. In the present study, the FAST had a sensitivity of 93.6% and a specificity of 89.0%. The DAT had a sensitivity of 88.6% and a specificity of 96.7%. Furthermore, using a large panel of serum samples of previously examined DAT positive or negative dogs it was shown that degree of agreement between the two tests was high (95.7%; kappa value = 0.91). The FAST offers the advantages of the DAT based on freeze-dried antigen with respect to stability of the antigen, sensitivity and specificity. Moreover, the FAST allows the rapid screening of a large number of samples, which makes the test very useful for epidemiological screening of large populations of dogs.
Asunto(s)
Pruebas de Aglutinación/métodos , Anticuerpos Antiprotozoarios/análisis , Enfermedades de los Perros/diagnóstico , Perros/inmunología , Perros/parasitología , Leishmania donovani/inmunología , Leishmaniasis Visceral/diagnóstico , Pruebas de Aglutinación/veterinaria , Animales , Anticuerpos Antiprotozoarios/inmunología , Antígenos de Protozoos/inmunología , Reservorios de Enfermedades/veterinaria , Enfermedades de los Perros/inmunología , Enfermedades de los Perros/parasitología , Leishmaniasis Visceral/inmunología , Leishmaniasis Visceral/veterinaria , Tamizaje Masivo/métodos , Tamizaje Masivo/veterinaria , Sensibilidad y Especificidad , Factores de TiempoRESUMEN
There is an urgent need for development of new serodiagnostic strategies for leptospirosis, an emerging zoonosis with worldwide distribution. We have evaluated the diagnostic utility of five recombinant antigens in enzyme-linked immunosorbent assays (ELISAs) for serodiagnosis of leptospirosis. Sera from 50 healthy residents of a high-incidence region were used to determine cutoff values for 96% specificity. In paired sera from 50 cases of leptospirosis confirmed by the microscopic agglutination test, immunoglobulin G (IgG) but not IgM reacted with the recombinant leptospiral proteins. The recombinant LipL32 IgG ELISA had the highest sensitivities in the acute (56%) and convalescent (94%) phases of leptospirosis. ELISAs based on recombinant OmpL1, LipL41, and Hsp58 had sensitivities of 16, 24, and 18% during the acute phase and 72, 44, and 32% during convalescence, respectively. Compared to sera from healthy individuals, patient sera did not react significantly with recombinant LipL36 (P > 0.05). Recombinant LipL32 IgG ELISA demonstrated 95% specificity among 100 healthy individuals, and specificities ranging from 90 to 97% among 30 dengue patients, 30 hepatitis patients, and 16 patients with diseases initially thought to be leptospirosis. Among 39 Venereal Disease Research Laboratory test-positive individuals and 30 Lyme disease patients, 13 and 23% of sera, respectively, reacted positively with the rLipL32 antigen. These findings indicate that rLipL32 may be an useful antigen for the serodiagnosis of leptospirosis.
Asunto(s)
Anticuerpos Antibacterianos/sangre , Antígenos Bacterianos/inmunología , Ensayo de Inmunoadsorción Enzimática/métodos , Leptospira/inmunología , Leptospirosis/diagnóstico , Antígenos Bacterianos/genética , Ensayo de Inmunoadsorción Enzimática/normas , Humanos , Inmunoglobulina G/sangre , Lipoproteínas/genética , Lipoproteínas/inmunología , Proteínas Recombinantes/genética , Proteínas Recombinantes/inmunología , Sensibilidad y EspecificidadRESUMEN
A commercially available slide agglutination test (SAT) for the diagnosis of human leptospirosis was evaluated by comparing it to an immunoglobulin M (IgM) enzyme-linked immunosorbent assay (ELISA) and to the microscopic agglutination test (MAT). For all 108 patients, leptospirosis was diagnosed on the basis of a fourfold or greater increase in titer by MAT (seroconversion), and all but 1 of 245 controls were MAT negative (titers, <1:100). Both SAT and the IgM ELISA failed to detect one case of infection (sensitivity, 99%). Only 3 of 145 blood donors and none of the 100 patients with other illnesses were SAT positive (specificity, 99%). The overall results were similar for the three tests; however, SAT and ELISA were statistically more sensitive as initial screening tests. For 22% of the patients, the diagnosis of leptospirosis was made earlier by SAT than by MAT. SAT detected 27 (44%) of 62 MAT-negative patients with the first serum sample. ELISA and SAT had very similar results. Follow-up of patients for 1 year after the onset of symptoms showed a decreasing rate of positivity by SAT from the third month on. The rate of positivity by ELISA decreased more slowly, to about 67% by the end of the study. By MAT all patients were persistently reactive. SAT and ELISA seem to be convenient methods for the rapid and early screening for leptospirosis and could replace the less sensitive MAT. ELISA gives less subjective results than SAT and provides information on IgM kinetics, but it can be performed only by the more sophisticated laboratories. SAT is inexpensive, can be performed more quickly and more easily than ELISA, and could be used by the less well equipped laboratories.
Asunto(s)
Pruebas de Aglutinación/métodos , Leptospirosis/diagnóstico , Adolescente , Adulto , Anciano , Pruebas de Aglutinación/estadística & datos numéricos , Anticuerpos Antibacterianos/sangre , Niño , Ensayo de Inmunoadsorción Enzimática/métodos , Ensayo de Inmunoadsorción Enzimática/estadística & datos numéricos , Estudios de Evaluación como Asunto , Femenino , Humanos , Inmunoglobulina M/sangre , Leptospira/inmunología , Leptospira/aislamiento & purificación , Leptospirosis/inmunología , Leptospirosis/microbiología , Masculino , Persona de Mediana Edad , Sensibilidad y Especificidad , Factores de TiempoRESUMEN
The authors report a case of right ventricle endomyocardial fibrosis in a 6-year-old boy. Particular attention is paid to the discussion of the new methods for diagnosing and treating these conditions, namely echocardiography, endomyocardial biopsy and surgery.
Asunto(s)
Fibrosis Endomiocárdica , Niño , Fibrosis Endomiocárdica/complicaciones , Fibrosis Endomiocárdica/diagnóstico , Fibrosis Endomiocárdica/tratamiento farmacológico , Humanos , MasculinoRESUMEN
A case of chondrosarcoma of the orbit is reported. The patient complained of marked deterioration of her vision, pain and presented exophatalmus of the left eye. Chondrosarcoma of the orbit are rare and this is the first case reported in the Brazilian literature. Diagnostic and prognostic are discussed.