Anti-SCD5 polyclonal antibody

Bladder cancer is the most common malignancy of the genitourinary tract. It is the fourth most common malignancy in men and the fifth most common malignancy in the general population, with a high recurrence rate. CD5(+) B lymphocytes are a subset of B lymphocytes, which contribute to innate immune responses. These cells are involved in the spontaneous production of self-reactive natural antibodies. On the other hand, natural antibodies can recognize tumor-associated antigens, including proteins or carbohydrates, and eliminate these cells in a complement-dependent manner or via induction of apoptosis. Besides surface CD5, the soluble form of this molecule is involved in the regulation of immune system. Considering the role of CD5(+) B cells in the production of natural immunoglobulin M (IgM) and role of these antibodies in antitumor responses, in this study, we aimed to investigate the frequency of CD5 in B cells and to evaluate the diagnostic potential of these cells and also soluble CD5 (sCD5) in patients with bladder cancer. Blood specimens were collected from 40 patients with bladder cancer, who were referred to Sina Hospital in Tehran, IRAN. The levels of CD5(+) and CD5(-) B lymphocytes were measured in the peripheral blood via flow cytometry, and the levels of sCD5 and total IgM were investigated in the serum by ELISA and nephlometry techniques, respectively. The frequency of CD5(+) and CD5(-) B cells was significantly lower in patients, compared with the healthy controls. Detectable levels of sCD5 were found in two patients (5%), while total IgM showed no significant difference between the patient and control groups. The present results suggest that B cell subsets may be affected by malignancy. Therefore, further research is needed to identify B cells and their soluble markers for diagnosis of patients with bladder cancer.

Stearoyl-CoA desaturase (SCD) is an important enzyme in the bovine mammary gland, where it inserts a cis-double bond at the 9 position in a wide range of fatty acids. Investigating SCD expression in the bovine mammary gland generally requires invasive biopsy to obtain mammary tissue. The aim of this study was to evaluate the use of milk somatic cells as a non-invasive alternative to biopsy for measuring mammary SCD expression in dairy cows. Both milk somatic cells and mammary tissue were collected from 14 Holstein-Friesian cows and used for analysis of SCD expression by real-time PCR. The SCD5 mRNA levels in mammary tissue compared with SCD1 were low, and for several milk somatic cell samples, SCD5 expression was even below the limit of detection. A significant relationship was found between SCD1 expression in milk somatic cells and in mammary tissue. In addition, SCD1 expression in milk somatic cells was significantly related to 9-desaturase indices in milk, which are commonly used as an indicator of SCD1 activity within the mammary gland. Our study showed that milk somatic cells can be used as a source of mRNA to study SCD1 expression in dairy cows, offering a non-invasive alternative to mammary tissue samples obtained by biopsy.