Associação entre diabéticos e câncer intestinal com o risco de mutação no gene CD38 na população iraniana / Association between diabetics and intestinal cancer with the risk of mutation in cd38 gene in iranian population

ABSTRACT BACKGROUND: Intestinal cancer often occurs in type 2 diabetic patients. The concept of increasing insulin levels and insulin-like growth factor in the blood with type 2 diabetes are stimulated with the growth and depletion of cloned cell walls, and the continuation of this process leads to the cellular deformation. This is the evidence for intestinal cancer in type 2 diabetes in population. OBJECTIVE: In this study, we aimed to find out the relationship between diabetics and intestinal cancer based on CD38 gene mutation. METHODS: Samples were collected from 200 population including normal and case ones. PCR products related to rs 6449181 of CD38 gene was amplified with ARMS-PCR technique, and a 420-bp sharp banding was observed as well. According three ARMS-PCR techniques, three primers were designed by oligo7 software. Primers include F1, F2 and R (amplifying for normal, mutant and reverse primer respectively). RESULTS: This band was observed using a primer F1 that carries the wild type nucleotide using a primer, and when it is used with the F2 primer, it brings the mutant primer to populations of patients with diabetes and diabetes-cancer. In addition, the clinical results including body mass index, blood glucose and insulin level were analyzed. The means ±SD and Tuckey's post hoc test were significant between the clinical characterization parameters between cases and healthy populations. The allelic gene frequencies and Hardy-Weinberg equilibrium between nucleotides were evaluated, and the significant level between the alleles and gene frequencies was observed. CONCLUSION: In general, the current study found that there is a relationship between diabetes and intestinal cancer among the studied populations.

RESUMO CONTEXTO: O câncer intestinal ocorre frequentemente em pacientes diabéticos tipo 2. O conceito que aumento dos níveis de insulina e fator de crescimento semelhante à insulina no sangue com diabetes tipo 2 sejam estimulados com o crescimento e esgotamento das paredes celulares clonadas, e a continuação desse processo levaria à deformação celular. Esta é a evidência para câncer intestinal em diabetes tipo 2 na população. OBJETIVO: Neste estudo, buscou-se descobrir a relação entre diabéticos e câncer intestinal com base na mutação genética CD38. MÉTODOS: Foram coletadas amostras de duzentos habitantes, incluindo os normais e os casos. Produtos PCR relacionados ao rs 6449181do gene CD38 foi amplificado com a técnica ARMS-PCR, e uma banda afiada de 420 bp também foi observada. De acordo com três técnicas ARMS-PCR, três primers foram projetados pelo software Oligo7. Os primers incluem F1, F2 e R (amplificando para primer normal, mutante e reverso, respectivamente). RESULTADOS: Esta banda foi observada usando um primer F1 que carrega o nucleotídeo do tipo selvagem usando um primer e quando é usado com o primer F2, ele traz o primer mutante para populações de pacientes com diabetes e diabetes-câncer. Além disso, foram analisados os resultados clínicos, incluindo índice de massa corporal, glicemia e nível de insulina. As médias ±SD e Tuckey's post hoc test foram significativas entre os parâmetros de caracterização clínica entre os casos e populações saudáveis. Foram avaliadas as frequências genéticas alélicas e o equilíbrio de Hardy-Weinberg entre nucleotídeos e observou-se o nível significativo entre os alelos e as frequências genéticas. CONCLUSÃO: Em geral, o presente estudo constatou que há relação entre diabetes e câncer intestinal entre as populações estudadas.

Changes in NAD/ADP-ribose metabolism in rectal cancer

The extent of ADP-ribosylation in rectal cancer was compared to that of the corresponding normal rectal tissue. Twenty rectal tissue fragments were collected during surgery from patients diagnosed as having rectal cancer on the basis of pathology results. The levels of ADP-ribosylation in rectum cancer tissue samples (95.9 ± 22.1 nmol/ml) was significantly higher than in normal tissues (11.4 ± 4 nmol/ml). The level of NAD+ glycohydrolase and ADP-ribosyl cyclase activities in rectal cancer and normal tissue samples were measured. Cancer tissues had significantly higher NAD+ glycohydrolase and ADP-ribosyl cyclase activities than the control tissues (43.3 ± 9.1 vs 29.2 ± 5.2 and 6.2 ± 1.6 vs 1.6 ± 0.4 nmol mg-1 min-1). Approximately 75 percent of the NAD+ concentration was consumed as substrate in rectal cancer, with changes in NAD+/ADP-ribose metabolism being observed. When [14C]-ADP-ribosylated tissue samples were subjected to SDS-PAGE, autoradiographic analysis revealed that several proteins were ADP-ribosylated in rectum tissue. Notably, the radiolabeling of a 113-kDa protein was remarkably greater than that in control tissues. Poly(ADP)-ribosylation of the 113-kDa protein in rectum cancer tissues might be enhanced with its proliferative activity, and poly(ADP)-ribosylation of the same protein in rectum cancer patients might be an indicator of tumor diagnosis.