Video Experimental Relacionado
Updated: Jul 28, 2026
07:45
Preparing and Injecting Embryos of Culex Mosquitoes to Generate Null Mutations using CRISPR/Cas9
Published on: September 10, 2020
La cuestión de una causa helmíntica de la preeclampsia fue planteada
JAMA
|December 2, 1983
Resumen
Se examinaron estructuras parecidas a gusanos previamente vinculadas a la preeclampsia. Estas estructuras no son helmintos, pero es probable que sean artefactos del proceso de tinción en muestras de sangre.
Área de la Ciencia:
- La investigación médica es la investigación médica.
- Patología Patología Patología.
- Parasitología Parasitología.
Sus antecedentes:
- Informes recientes sugieren que las estructuras similares a las de los helmintos están asociadas con la preeclampsia.
- La preeclampsia es una complicación grave del embarazo.
Objetivo del estudio:
- Para investigar la naturaleza de las estructuras vermiformes observadas en muestras de sangre de preeclampsia.
- Para determinar si estas estructuras son helmintos o artefactos.
Principales métodos:
- Se examinaron frotis de sangre con color O azul toluidina de pacientes con preeclampsia, recién nacidos, sujetos de control y perros.
- Se analizaron estructuras con diámetros que oscilaban entre 30 y 670 micras.
- Se ha probado la filtrabilidad de las estructuras a través de un filtro de 12 micras.
Principales resultados:
- Se identificaron estructuras vermiformes en muestras de sangre de preeclampsia y controles.
- Las estructuras estaban presentes en los frotis manchados incluso después de la filtración de la sangre.
- Las estructuras no podían ser concentradas por filtración.
Conclusiones:
- Las estructuras vermiformes identificadas no son helminto.
- Estas estructuras son muy probablemente artefactos resultantes del procedimiento de tinción.
- Este hallazgo refuta un vínculo potencial entre los helmintos y la preeclampsia basado en estas estructuras.
Videos de Conceptos Relacionados
01:41Spermatogenesis
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
01:07Teratogenicity
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
01:24Disorders of the Female Reproductive System
The female reproductive system can be affected by several disorders, including Premenstrual Syndrome (PMS), Premenstrual Dysphoric Disorder (PMDD), endometriosis, and various forms of cancer. PMS and PMDD are cyclical conditions that cause physical and emotional distress, with symptoms that include edema, mood swings, and food cravings. PMDD is a more severe form of PMS characterized by increased symptom severity that peaks during the luteal phase and tends to improve or resolve shortly after...
01:28Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
01:28Toxoplasmosis
Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...
01:22American Trypanosomiasis
Chagas disease, or American trypanosomiasis, is a vector-borne parasitic infection caused by Trypanosoma cruzi, a flagellated protozoan (kinetoplastid) of the family Trypanosomatidae. The disease is endemic in Latin America, although cases are increasingly reported worldwide due to human migration. Transmission most commonly occurs when feces of infected triatomine bugs contaminate bite wounds or mucosal surfaces; additional routes include congenital, transfusional, transplant-related, and oral...