part02：癌胚抗原（cea）有其生理作用吗？ cea 属于称为 cea 相关细胞粘附分子 (ceacams) 的免疫球蛋白家族，cea 与内皮细胞的各种功能密切相关，包括细胞在体内和体外的粘附、增殖和迁移。它存在于正常细胞细胞膜的腔内侧，被认为可以抑制细胞凋亡，因此参与 ...

2024年12月11日 · Carcinoembryonic antigen (CEA) is a nonspecific serum biomarker that is elevated in many malignancies, including colorectal cancer, medullary thyroid cancer, breast cancer, and mucinous ovarian cancer. CEA was first detected in colon cancer cells by Freedman and Gold and was eventually found in various other epithelial cells in the stomach, tongue, esophagus, cervix, and prostate.[1] This ...

2022年4月11日 · CEA is sometimes called a tumor marker or tumor antigen. Tumor markers are substances that some cancer cells make and shed into bodily fluids at times. Healthy cells also may make tumor markers in very low levels. Many healthy people have “normal” level of tumor makers, which is called normal range, reference range or reference interval on lab reports.

Además, el CEA puede aumentar aunque no exista cáncer en los casos de inflamación, cirrosis, úlcera péptica, colitis ulcerosa, pólipos rectales, enfisema, trastornos mamarios benignos, así como en los fumadores. Por este motivo, el CEA no constituye una prueba de cribado de cáncer aplicable a la población general. No obstante, es un ...

mÓdulo ii: normas internacionales para la gestiÓn de seguridad, salud en el trabajo y medio ambiente

癌胚抗原（Carcinoembryonic antigen，CEA）是一種存在於粘膜细胞中的醣蛋白 [1] 。 通常胎儿发育時癌胚蛋白會在胃肠组织中产生，但在出生後該物質就不再产生。因此健康成人的血液中通常癌胚蛋白的含量非常低（约2-4纳克/毫升） [2] 。 然而罹患某些类型的癌症患者的血液中癌胚抗原水平会升高，这 ...

CEA levels can provide significant insights during the diagnosis and staging of various cancers. A high baseline level of CEA can suggest the presence of certain malignancies, particularly colorectal cancer. This can help in initiating further diagnostic testing, such as imaging studies or biopsies, to confirm a diagnosis. ...

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CEA is a monomeric glycoprotein (molecular weight approximately 180,000 daltons) with a variable carbohydrate component of approximately 45% to 60%. 1,2 CEA, like AFP, belongs to the group of carcinofetal antigens produced during the embryonic and fetal period. CEA is mainly found in the fetal gastrointestinal tract and in fetal serum.

2025年3月22日 · cea. Domain. 2D. Input type. Geodetic coordinates. Output type. Projected coordinates. ... Defines the latitude where scale is not distorted. Takes precedence over +k_0 if both options are used together. Defaults to 0.0. Note. The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with ...