Signaling pathways in early onset sporadic breast cancer of patients in Indonesia.

AIM: to determine signaling pathways in breast cancers from patients aged 35 years old or younger and patients aged more than 35 years old. METHODS: this was a cross-sectional, comparative study of female breast cancer patients who were recruited and divided into two age groups, i.e. 35 years or younger and more than 35 years old. Specimens were obtained by biopsy or surgical removal of the tumors and were confirmed by histopathological examination. The expression of ER, IGF-1R, Her-2, MAPK, and cyclin D1 were measured using immunohistochemistry. RESULTS: ninety-three patients were recruited from September 2004 to December 2005. Forty-three patients were 35 years or younger. More than 90% of the patients within the two groups showed invasive ductal carcinomas and more than half of these tumors were grade 2. Immunohistochemical staining was successfully done in 90 patients. ER-alpha expression was negative in 33 breast cancers (78.6%) from patients less than 35 years old and 32 cancers (66.7%) of older patients. The expressions of IGF-1R, Her-2, MAPK, and cyclin D1 were positive, respectively in 17 (40.5%), 11 (26.2%), 28 (66.7%), and 7 (16.7%) cancers within the group of patients 35 years old or younger, and, respectively in 18 (37.5%), 11 (22.9%), 37 (77.1%), and 9 (18.8%) of cancers from patients more than 35 years old. CONCLUSION: there were no statistically significant differences in the expression of any of the biomarkers between the two groups. In all patients, ER was negative in 72.2% cases and MAPK was positive in 76.7% cases. Patients aged 35 years or younger showed similar ER, IGF-1R, Her-2, MAPK, and cyclin D1 expressions compared to cancers from patients more than 35 years old. These were predominantly ER-negative, suggesting that estrogen does not play a dominant role in their growth. The frequent expression of MAPK in these cancers raises the possibility that growth factors play a dominant role in their growth.

Papel dos componentes do sistema GH-IGF-IGFBP nos mecanismos envolvidos na resposta imunológica do Diabetes Melito tipo 1 / The role of GH-IGF-IGFBP system proteins on the involved mechanisms of type 1 Diabetes Mellitus immune response

Com o objetivo de verificar se as proteínas do sistema GH-IGF-IGFBP e o IGF-IR estão envolvidos na etiopatogenia do DM1, foram estudados 33 pacientes portadores de DM1 em diferentes fases do diagnóstico e 10 indivíduos sadios. A expressão do IGF-IR realizada através de RT-PCR nos linfócitos periféricos T e B não demonstrou diferenças nos linfócitos T quando comparados indivíduos diabéticos e controles. Observou-se uma maior expressão do IGF-IR dos linfócitos B de pacientes diabéticos em relação ao grupo controle. A avaliação do sistema GH-IGF-IGFBP não demonstrou diferença entre os grupos. Estes achados associados à presença de anticorpos suportam o papel do IGF-IR na etiopatogenia do DM1.Aiming to verify if GH-IGF-IGFBP system and IGF-IR are implicated on pathofisiology of DM1, we studied 33 patients with DM1 on different stages of diagnosis and 10 healthy subjects as control group. The RT-PCR molecular assay for IGF-IR mRNA on peripheral T and B lymphocytes didn't show differences between the groups when T cells were analyzed. We found an increase of IGF-IR mRNA expression on B cells from diabetic patients when compared the two groups. There were no differences in the GH-IGF-IGFBP system levels between the groups. Our study suggests that IGF-IR in association with Diabetes-related autoantibodies presence can be involved on pathofisiology of DM1...

Malignant solitary fibrous tumor of the pleura causing recurrent hypoglycemia; immunohistochemical stain of insulin-like growth factor i receptor in three cases

We present three cases of malignant solitary fibrous tumors of the pleura (SFTP) that produced recurrent hypoglycemia. Removal of the tumors produced normoglycemia. The tumors were well circumscribed and lobulated, and consisted of firm masses weighing 1,150 g to 1,450 g with the greatest diameter of 15 to 20 cm. The tumors were composed of spindle cells in fascicles or in a haphazard arrangement and were highly cellular and mitotically active (3-8 mitoses/10 high-power fields), showing histologically malignant features. Ultrastructurally, fibroblastic features of the tumor cells were present. Insulin-like growth factors (IGF) have been implicated in the presentation of hypoglycemia. The serum insulin and C-peptide levels were not elevated. Serum IGF-I levels were also low with values of 97.4, 157.1 and 51.9 ng/mL (ref. 125-317 ng/mL), respectively. However, tumor cells were strongly positive for IGF-I receptor on immunohistochemical analysis. It is tempting to speculate that IGF-I contributes to the hypoglycemia, even though the circulating levels were low.

Expressão de receptor para o fator de crescimento insulina-símile tipo I (IGF-IR) na fase crônica da leucemia mielóide crônica (LMC) / Expression of the receptor to the insulin-like growth factor type I (IGF-IR) in chronic phase of the chronic myelogenous leukemia (CML)

Com o objetivo de verificar se o fator de crescimento insulina símile tipo I (IGF-I) e seu receptor (IGF-IR) estão implicados na instalação da leucemia mielóide crônica (LMC) foram estudados 35 pacientes portadores de LMC na fase crônica antes ou durante o tratamento com interferon `ALFA' ou hidroxiurea e 16 indivíduos sadios como grupo controle. A análise do IGF-IR realizada através da citometria de fluxo e expressão de seu RNAm pelo ensaio molecular de RT-PCR nas células sanguíneas dos pacientes com LMC não tratada não mostrou diferenças estatísticas em relação ao grupo controle. Pacientes tratados com hidroxiurea apresentaram expressão diminuída do receptor em granulócitos, monócitos e linfócitos (P`MENOR'0,01) quando comparados aos demais grupos analisados...