The second cohort consisted of 60 triple samples (cancerous tissue, matched normal tissue and serum samples) from 20 patients with non-familial breast cancer.
The number of 126 samples consisting of two different cohorts was used (first cohort: plasma samples from breast cancer patients and normal controls; second cohort: triple matched samples including cancerous tissue, matched normal tissue and serum samples).
To proof that hypermethylation pattern in plasma cfDNA of breast cancer patients is derived from tumor tissue, triple matched samples including breast cancerous tissue, matched normal tissue and serum samples were analyzed.
To confirm that hypermethylation of cell free DNA in circulation of breast cancer patients are derived from tumor tissue, triple matched samples including cancerous tissue, matched normal tissue and serum samples were analyzed.
Accordingly, compared to age matched normal weight controls, serum levels of anandamide are increased in patients with AN.
In another study, Radpour et al. [ 96] focused on ten candidate genes and investigated two cohorts: a first cohort with 36 plasma samples from breast cancer patients and 30 plasma samples from healthy controls, and a second cohort of 60 triple matched samples (cancerous tissue, and matched normal tissue and serum samples) from 20 patients with non-familial breast cancer.
The slides were then fixed in 4% paraformaldehyde (PFA) for 5 min and blocked with secondary antibody-matched normal serum for 1 h, followed by incubation with mouse anti-rat CD44, CD90, and CD105 antibodies (1 100, Sigma-Aldrich, St . Louis MO,) overnight at 4 °C.
Hundred osteoporotic men with age matched normal were studied for serum levels of sex steroids, PTH, IGF system components, cytokines and bone turnover markers.
The control (non-RB) serum samples (n = 20) were collected from the age matched normal children.
Tissue cultures were established from tumor tissues and matched normal tissues of four laryngeal SCC patients and were based on a serum-free primary culture system.
