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Shrimp fisheries are among the most important fisheries worldwide, and shrimp culture has increased considerably in recent years. Most current studies on reproduction-related genes have been conducted on cultured shrimp. However, gene expression is intimately linked to physiological and environmental conditions, and therefore an organism's growth environment has a great influence on reproduction. Thus, gene expression profiling, should be applied in fisheries studies. Here, we identified the expression patterns of 76 reproduction-related genes in P. vannamei via the analysis of pooled transcriptomes from a time-series experiment encompassing a full circadian cycle. The expression patterns of genes associated both directly (Vtg, ODP, and ProR) and indirectly (FAMet, CruA1, and CruC1) with reproduction were evaluated, as these genes could be used as molecular markers of previtellogenic and vitellogenic maturation stages. The evaluated genes were prominently upregulated during vitellogenic stages, with specific expression patterns depending on the organism's environment, diet, and season. Vtg, ProR, ODP, and FaMet could serve as molecular markers for both wild and cultured organisms.

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After undergoing remodeling, uterine spiral arteries turn into wide, flexible tubes, with low resistance. If remodeling does not occur, spontaneous abortions, intrauterine growth restriction, and pregnancy-related hypertensive disorders can ensue. Arterial transformation begins at a very early gestational stage; however, second quarter pregnancy histopathological samples have yet to pinpoint the exact moment when abnormal remodeling transpires. We examined 100 samples, taken from consecutive abortions at 12-23 gestational weeks. Following Pijnenborg and Smith guidelines, blinded pathologists analyzed clinical data on remodeling stages. Lab results showed that arterial remodeling is not synchronic in all vessels; a single sample can include various remodeling stages; neither is remodeling homogenous in a single vessel: change may be occurring in one part of the vessel, but not in another. To our knowledge, no one has published this finding. In the examined age group, Smith stage IV predominates; around week 14, substantial muscle and endothelium loss takes place. After week 17, endovascular or fibrin trophoblast does not usually occur. Although scant consensus exists on what defines preeclampsia etiology, it is clear that it involves abnormal remodeling in decidua vessels. Improved understanding requires further knowledge on both the physiological and pathological aspects of the remodeling process. We observed that muscle and endothelial tissues disappear from weeks 14-17, after which time reendothelization predominates. We list the expected proportion of spiral artery changes for each gestational age which, to date, has not been available.

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RESUMEN El síndrome de Sjögren es una enfermedad autoinmunitaria sistémica con un alto impacto individual y social. El compromiso pulmonar presenta múltiples manifestaciones, con impacto en calidad de vida y riesgo de mortalidad. El abordaje dinámico integrado mediante un grupo de diagnóstico multidisciplinario que incluya expertos en neumología, reumatología, radiología y patología tiene el potencial de impactar en la identificación, las estrategias de manejo y los desenlaces. Aunque es necesario reconocer tempranamente a los pacientes con mayor riesgo, en la actualidad no se cuenta con biomarcadores confiables. Las estrategias de manejo farmacológico se basan en la inmunomodulación, pero la evidencia para su uso es de baja calidad. Promover el entrenamiento y la sensibilización del personal de salud podría reducir los retrasos en el acceso a una evaluación especializada.

ABSTRACT Sjögren's syndrome is a systemic autoimmune disease with a high burden for the individual, as well as society. Pulmonary compromise presents with a myriad of manifestations that influence patient quality of life and mortality risk. An integrated dynamic approach by a multidisciplinary diagnostic discussion team that includes experts in chest diseases, rheumatology, radiology, and pathology has the potential to improve the identification, management strategies, and outcomes. Although early recognition of patients at high risk is essential, there is currently a lack of reliable biomarkers. Pharmacological therapies are based on immunomodulation, although the evidence to support their use is of low quality. Increasing awareness and training among healthcare professionals may reduce a delayed access to specialized assessment.

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This report describes the presence of Aedes albopictus Skuse (Diptera: Culicidae) in Yucatan Peninsula and represents the first record of the Asian tiger invasive mosquito in Campeche State, southeastern Mexico. We collected specimens using 11,326 ovitraps put into houses of urban and rural areas, as part of the entomological surveillance by the local Ministry of Health from January 2019 to February 2020. We found Ae. albopictus in five of the 12 municipalities of Campeche (San Francisco de Campeche, Tenabo, Hecelchakán, Calkíni and Escárcega). We record 68 positive ovitraps and 226 Ae. albopictus larvae. This finding increases the number of mosquito species recorded in Campeche, Mexico, and possibly the potential for 22 arbovirus transmission.

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BACKGROUND AND OBJECTIVE: The characteristics of human hematopoietic stem cells are conditioned by the microenvironment of the bone marrow, where they interact with other cell populations, such as mesenchymal stem cells and endothelial cells; however, the study of this microenvironment is complex. The objective of this work was to develop a 3D culture system by magnetic levitation that imitates the microenvironment of human HSC. METHODS AND RESULTS: Human bone marrow-mesenchymal stem cells, umbilical cord blood-hematopoietic stem cells and a non-tumoral endothelial cell line (CC2811, LonzaⓇ) were used to develop organotypic multicellular spheres by the magnetic levitation method. We obtained viable structures with an average sphericity index greater than 0.6, an average volume of 0.5 mm3 and a percentage of aggregation greater than 70%. Histological studies of the organotypic multicellular spheres used hematoxylin and eosin stains, and an evaluation of vimentin expression by means of immunohistochemistry demonstrated an organized internal structure without picnotic cells and a high expression of vimentin. The functional capacity of human hematopoietic stem cells after organotypic multicellular spheres culture was evaluated by multipotency tests, and it was demonstrated that 3D structures without exogenous Flt3L are autonomous in the maintenance of multipotency of human hematopoietic stem cells. CONCLUSIONS: We developed organotypic multicellular spheres from normal human cells that mimic the microenvironment of the human hematopoietic stem cells. These structures are the prototype for the development of complex organoids that allow the further study of the biology of normal human stem cells and their potential in regenerative medicine.

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The purpose of this study was to evaluate the effect of group hypnotherapy on anxiety, depression, stress, self-esteem, optimism, and social support during chemotherapy, in patients with breast cancer, compared with a control group with standard medical care. Hypnotherapy consisted of 24 sessions that included suggestions to encourage relaxation, self-esteem, the resolution of past traumatic events, physical healing, and optimism. Results show that the hypnotherapy group significantly decreased anxiety, distress, increased self-esteem, and optimism in the first 12 sessions. However, at the end of the 24 sessions, only self-esteem and optimism remained significant compared with the control group. The convenience of using hypnotherapy to encourage optimism and self-esteem in patients with breast cancer during chemotherapy treatment is discussed given its protective effect on health.

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Triple-negative breast cancer (TNBC) is an aggressive subtype of breast cancer tumors. Comparisons between TNBC and non-triple negative breast cancer (nTNBC) may help to differentiate key components involved in TNBC neoplasms. The purpose of the study was to analyze the expression profile of TNBC versus nTNBC tumors in a homogeneous population from northeastern Mexico. A prospective study of 50 patients was conducted (25 TNBC and 25 nTNBC). Clinic parameters were equally distributed for TNBC and nTNBC: age at diagnosis (51 vs 47 years, p=0.1), glucose levels (107 mg/dl vs 104 mg/dl, p=0.64), and body mass index (28 vs 29, p=0.14), respectively. Core biopsies were collected for histopathological diagnosis and gene expression analyses. Total RNA was isolated and expression profiling was performed. 40 genes showed differential expression pattern in TNBC tumors. Among these, 9 over-expressed genes (PRKX/PRKY, UGT8, HMGA1, LPIN1, HAPLN3, and ANKRD11), and one under-expressed (ANX9) gene are involved in general metabolism. Based on this biochemical peculiarity, and the over-expression of BCL11A and FOXC1 (involved in tumor growth and metastasis, respectively) we validated by qPCR the expression profile of 7 genes out of the signature. In this report, a new gene signature for TNBC is proposed. To our knowledge, this is the first TNBC signature which describes genes involved in general metabolism. The findings may be pertinent for Mexican patients and require to be evaluated in further ethnic groups and populations.

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A new species of nematode, Torrestrongylus tetradorsalis n. sp., is described herein, based on specimens recovered from the small intestine of the leaf-nosed bat, Macrotus waterhousii, from the Biosphere Reserve "Sierra de Huautla" in the state of Morelos, Mexico. The new species is included in Torrestrongylus because it features a bursa of the type 3 - 2, a divided cephalic vesicle with an anterior half in the shape of an umbrella, and a posterior widened half. The new species can be distinguished from the only other congener T. torrei Pérez-Vigueras, 1935 by four key features: first, by the absence of cervical alae in both males and females; second, by the relatively longer second half of the cephalic cap; third, by the configuration of the dorsal ray, that does not have a medial terminal ray, and finally, by the structure of the spicules. This is the second species in the genus, previously known from bats of the families Phyllostomidae and Molossidae in Cuba, and now in Mexico.

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Macuahuitloides inexpectans n. gen., n. sp. (Molineidae: Anoplostrongylinae) is herein described. The description is based on specimens removed from the small intestine of ghost-faced bats, Mormoops megalophylla, from central Mexico. The monotypic genus is unique in featuring sexual dimorphism on the cuticular ornamentation, which consists of the presence of spines on the anterior quarter of females, and of the presence of rugosities on the surface of the cephalic vesicle of males. The cuticular spines are arranged in spiral rings on the anterior quarter of the body, and there is no trace of said structures on the cuticle of males. The synlophe of the males possess 12 ridges, whereas there is no synlophe in females. Finally, females show a prominent caudal terminus (spine) and 3 subterminal tubercles, whereas males show bursal rays in a 3-2 arrangement, with a relatively prominent dorsal ray.

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Fundamento: el perfeccionamiento de la labor docente del profesor desde la óptica de sus alumnos contribuye a la autocrítica profesional y a su paulatina transformación en su desempeño como docente. Métodos: se realiza un estudio de casos con alumnos de tercer año de la carrera de Estomatología, del curso 2010-2011. De un universo de 112 estudiantes, se selecciona una muestra intencional de 18, al tener en cuenta que recibieron toda su formación en la educación en el trabajo con el mismo docente. A ellos se les aplicó una encuesta inicial, para una autovaloración de los conocimientos y habilidades adquiridos en el tema mencionado, y además responder positiva o negativamente respecto a la influencia ejercida por el docente. Se realiza un análisis documental del registro de asistencia y evaluación, para constatar las evaluaciones alcanzadas en el seminario, educación en el trabajo, examen práctico del tema, y en la pregunta del examen final correspondiente a la estancia. Resultados: los alumnos expresan criterios favorables sobre el desarrollo del proceso docente educativo y el tratamiento de los diferentes componentes procesales, también se constatan resultados satisfactorios en las evaluaciones realizadas. Conclusiones: los resultados alcanzados apuntan hacia una correcta dirección del proceso docente educativo a partir de la preparación del docente en el campo pedagógico.

Background: the improvement of the teachers' teaching, from the perspective of the students, contributes to professional self-criticism and a gradual transformation in their performance as teachers. Methods: a case study was conducted with 3rd year Dentistry students in the academic year 2010-2011. From a universe of 112 students, a purposive sample of 18 students was selected, taking into account that they received all their training in education at work with the same teacher. They were given an initial survey, for a self-assessment of the knowledge and skills acquired in the above mentioned subject; and they were also asked to respond positively or negatively on the influence exerted by the teacher. A documentary analysis of the attendance and assessment records was conducted to verify the marks achieved at the seminar, education at work, practical examination of the subject, and the final exam question related to the rotation stay. Results: students express favorable criteria on the development of the teaching-learning process and the treatment of different procedural components. There were also satisfactory results in the examinations performed. Conclusions: the obtained results point to the correct management of the teaching-learning process based on the preparation of teachers in the pedagogical field.

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