針對(duì)B細(xì)胞相關(guān)惡性腫瘤的激酶抑制劑的藥物學(xué)研究
[Abstract]:1. the discovery of high activity, high selective PI3K delta kinase inhibitors and PI3K Delta /VPS34 double inhibitors for B cell malignancies and the discovery of PI3K delta mainly expressed in leukocytes and overexpression in B cell related malignant tumor cells such as chronic lymphoblastic leukemia and acute myelocytic leukemic disease. B- cell related cancer has a close relationship, so PI3K delta kinase has been widely concerned in the field of drug research in recent years. This paper has studied its mechanism from drug discovery to drug action from two aspects. Chapter 1: the discovery of PI3K delta kinase selective inhibitor PI3KD-IN-015 for B cell malignant tumor. In computer aided design and drug chemical methods, we found a competitive ATP PI3K delta inhibitor PI3KD-IN-015. Both biochemical experiments and intracellular experimental results showed that PI3KD-IN-015 had better selectivity to PI3K Delta and did not inhibit most of the kinases in the kinase group. By inhibiting the PI3K delta mediated signal pathway, PI3KD- IN-015 can inhibit the proliferation of various B cell related cancer cell lines to a certain extent, and can induce apoptosis and autophagy in the malignant tumor cell lines of B cells. In addition, the combination of the autophagy inhibitor Bafilomycin can enhance the anti proliferation effect of PI3KD-IN-015 to inhibit the chronic lymphocytic leukemia. The proliferation of primary cells in human and acute myeloid leukocytes. These results suggest that PI3KD-IN-015 may be a potential candidate for B cell related malignancies. Second chapter: the present study of the PI3K Delta /VPS34 kinase double inhibitor PI3KD/V-IN-01 in the target B cell malignant tumor, although the first selective PI3K delta suppression. The preparation CAL1 01 has achieved clinical success, but the results of clinical trials and basic studies show that inhibition of PI3K delta itself has no strong killing effect on the cell lines of B cells, and a similar phenomenon has been observed in the characterization of PI3KD-IN-015. One possible reason is the inhibition of PI3K delta to induce cell autophagy. Protective cells escape death. Since class III P13K subtype PIK3C3/Vps34 plays an important role in the initiation and development of autophagy, we judge that a double inhibitor of PI3K Delta and Vps34 may enhance the antiproliferative activity of the PI3K8 targeting inhibitor we observed. A highly active ATP competitive PI3K Delta /Vps34 double inhibitor PI3KD/V-IN-01, which is 6 nM and 19 nM. for the other P13K subtypes of PI3K8 and Vps34, shows 10-1500 times the selectivity for PI3KD/V-IN-01, and does not inhibit other kinases in the kinase group. The type I P13K subtype showed a 30-300 fold selectivity. Compared with the selective PI3K8 inhibitor CAL-101 and the selective Vps34 inhibitor VPS34-IN-1, the PI3KD/V-IN-01 showed a better anti chronic lymphocytic leukemia cell line and the proliferation activity of the acute myeloid leukemia cell line Burkitt lymphoma cell line. In addition, we also observed that the FLT3-ITD acute myeloid leukemia cell line is more sensitive to PI3KD/V-IN-01 than the acute myeloid leukemia cell lines expressing wild type FLT3. In the xenograft mice model of acute myeloid leukemia cell line MV4-11, PI3KD/V-IN-01 showed a dose dependent anti tumor effect. The results suggest that double inhibition of PI3K Delta and Vps34 may be an effective method to improve the antitumor effect of P13K8 inhibitors..2. for the high activity and high selectivity of BCR-ABL kinase inhibitor CHMFL-ABL-053 for chronic myelocytic leukemia, BCR-ABL fusion tyrosine kinin tumor protein is the cause of chromosome positive in Philadelphia The key factors of sexual myelocytic leukemia (Ph+CML), as a target for new drug development, have been a great deal of exploration for BCR-ABL. However, most of the inhibitors of BCR-ABL kinase are multiple target inhibitors, especially they can strongly inhibit the activity of cKIT similar to the ABL kinase structure. In order to further explore A The physiological and pathological effects of BL kinase provide a more selective inhibitor. We begin to modify the two pyrimidine and pyrimidine core skeleton of a multi target ABL inhibitor, GNF-7, and modify it by drug chemistry. A highly active and highly selective BCR-ABL inhibitor, CHMFL-ABL-053, is found, and the ICso of ABL1 kinase is 70. NM. in the DiscoveRx's KinomeScanTM selective test, CHMFL-ABL-053 has a high selectivity in the kinase group. S score (1) =0.02. and CHMFL-ABL-053 have no obvious inhibitory activity on the common side target of Imatinib, Nilotinib, Botutinib, and Dasatinib, which are commonly used as the BCR-ABL kinase inhibitors. CR-ABL's autophosphorylation (ECso about 100 nM) and its downstream STAT5, Crkl and ERK phosphorylation, CHMFL-ABL-053 can inhibit the proliferation of chronic myelogenous leukemia cell line K562 (GI50:14 nM), KU812 (GI50:25), and also induce cell apoptosis. At the same time, it can also induce apoptosis. The results of the kinetic study showed that the half-life of CHMFL-ABL-053 was greater than that of 4H and had 24% bioavailability. In the mouse model of xenograft tumor inoculated with K562 cells, the dose of 50mg/kg/ day dose almost completely inhibited the growth of tumor in mice. As a potential and effective candidate for chronic myelogenous leukemia, CHMFL-ABL-053 is currently being used. A large number of pre clinical drug resistance assessments were carried out.
【學(xué)位授予單位】:中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:R730.5
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