Video Experimental Relacionado
Updated: Sep 28, 2026
07:37
Using Terminal Transferase-mediated dUTP Nick End-labelling (TUNEL) and Caspase 3/7 Assays to Measure Epidermal Cell Death in Frogs with Chytridiomycosis
Published on: May 16, 2018
Lesiones cutáneas neoplásicas y posiblemente relacionadas en salamandras tigre neotónicas de una laguna de aguas
Science (New York, N.Y.)
|April 15, 1977
Resumen
Las salamandras tigre en las lagunas de aguas residuales exhiben neotenia y una alta tasa de cáncer de piel. Se sospecha que los contaminantes ambientales son la causa de estas neoplasias en los anfibios acuáticos.
Área de la Ciencia:
- Toxicología ambiental y toxicología ambiental.
- Biología de los anfibios.
- Investigación de la neoplasia en la investigación de la neoplasia.
Sus antecedentes:
- Las salamandras tigre (Ambystoma tigrinum) pueden exhibir neotenia, conservando las características larvales en la edad adulta.
- El neotenio en entornos acuáticos puede verse influenciado por factores ambientales.
- En estas poblaciones se han observado lesiones cutáneas, incluidas neoplasias cancerosas.
Objetivo del estudio:
- Para investigar el fenómeno de la neotenia en las salamandras tigre que habitan en una laguna de aguas residuales.
- Documentar la prevalencia y las características de las lesiones cutáneas neoplásicas en esta población.
- Explorar las posibles causas químicas ambientales de las neoplasias observadas.
Principales métodos:
- Observación de campo de las poblaciones de salamandra tigre en una laguna de sedimentación de aguas residuales.
- Evaluación morfológica de los signos de neotenia.
- Examen dermatológico y biopsia de lesiones cutáneas para el análisis histopatológico.
- Muestreo ambiental y análisis químico del agua de la laguna (detalles no proporcionados en el resumen).
Principales resultados:
- Una proporción significativa de las salamandras tigre en la laguna mostraban neotenia.
- Aproximadamente un tercio de las salamandras neoténicas desarrollaron lesiones cutáneas neoplásicas, indicativas de cáncer.
- Las circunstancias que rodean a la población sugieren una etiología química para las neoplasias observadas.
Conclusiones:
- Los entornos de las lagunas de aguas residuales pueden inducir neotenia en las salamandras tigre.
- La exposición a contaminantes ambientales en lagunas de aguas residuales está fuertemente implicada como causa de cáncer de piel en estos anfibios.
- Se necesita más investigación para identificar los agentes químicos específicos responsables de la neoplasia.
Videos de Conceptos Relacionados
01:23Skin Diseases and Disorders
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
01:30Skin Cancer
Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
01:26Sexually Transmitted Infections
Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
01:26Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
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...
01:28Amebiasis
Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...