Enzyme-Linked Immunosorbent Assay Detection For Malignancy Using Anti-P53 Antibodies

@#Tumour protein 53 (p53) plays an important role in the instruction of the cell cycle. In a variety of transformed cell lines, tumour protein is expressed in high amounts, and it is believed to contribute to transformation and malignancy. This research aimed to detect the anti-p53 antibodies in sera of patients with various malignant tumours and to evaluate the sensitivity and specificity of an enzyme-linked immunosorbent assay (ELISA). A case-control study was conducted on samples from 49 patients with various types of malignant tumours at Sultanah Bahiyah Hospital, Alor Setar, Kedah, Malaysia, and 32 healthy control cases with non‐malignant disease collected from Universiti Sains Malaysia clinic, Penang, Malaysia. The antibodies against p53 protein in the serum samples were analysed using the commercial ELISA kit, Calbiochem® p53- ELISAPLUS. The results showed that the rate of anti-p53 antibodies in patients with various malignant tumours was 13 out of 49 (26.5 %), compared with only 2 out of 32 (6.25%) in healthy controls (p < 0.001). The sensitivity of this kit reached 28.6% and the specificity was 93.8%. In conclusion, these results suggest that the anti-p53 antibodies can be detected in different sera of malignant tumour patients and the ELISA kit is highly specific; nevertheless, its discrimination power is not perfect because of its low sensitivity to determine the anti-p53 antibodies.

Is microbial infection always harmful? / 中华实验眼科杂志

It is possible for microbial infection (including parasitic infection) to disrupt the balance of autoimmune tolerance,result in the dysfunction of immune system,and make the organism encountered with the attack of the autoimmune disease.As one of the common places between foreign antigens and autoantigens,molecular mimicry is believed to play a vital role in the pathogenesis of autoimmune diseases.However,a large number of studies suggest that rather than inducing various symptoms of autoimmune diseases,many infection of microorganisms covered with mimic peptide of the autoantigen may even protect the infected organism from the disease at the level of antibodies or T cells when the analogous antigen invaded again.The present paper reviews the possible prognosis after microbial infection based on molecular mimicry.

Construction of a Transgenic Mice Model with High Serum Titer of Natural Anti-keratin Autoantibody / 中华皮肤科杂志

Objective To construct an anti-keratin autoantibody (AK auto Ab) transgenic mouse model. Methods Linearized transgene plasmid was microinjected into the zygotes of CBA?C57BL/6 mice, which were transplanted into the oviducts of pseudo-pregnant mice. PCR was used to identify the genotype of the offsprings, and ELISA was applied to measure the serum levels of AK auto Ab. Results Twelve transgene positive founder mice were obtained, and 9 of them produced offsprings as the third generation. The serum level of AK auto Ab was increased in 3 of the transgenic mice. Conclusions AK auto Ab transgenic mice were successfully established; these mice could serve as an animal model with increased serum levels of AK auto Ab.