[Effect of Berbamine Combined with Ibrutinib on the Proliferation and Apoptosis of Acute Myeloid Leukemia Cells].

OBJECTIVE: To investigate the effects of the combination of berbamine (BBM) and ibrutinib on the proliferation and apoptosis of acute myeloid leukemia (AML) cells and the mechanism of combined action. METHODS: The AML cell lines were treated with BBM, ibrutinib and the combination of the two drugs respectively, CCK-8 method was used to detect the cell proliferation inhibition rate of each group and calculate the combination index (CI). The cell apoptosis in each group was detected by flow cytometry. Western blot was used to determine the expression of related proteins in each group. RESULTS: The cell viability in the combination group was significantly reduced, and the CI value of ED50/ED75/ED90<1. The expression of apoptotic related protein in the combination group was significantly up-regulated, while the expression of p-BTK, p-AKT, CREB, GSK3ß and BCL-XL were significantly down-regulated. CONCLUSION: BBM and ibrutinib can synergistically inhibit the proliferation of AML cells and promote the apoptosis of AML cells. BBM and ibrutinib may play a synergistic effect through the p-BTK/p-AKT/CREB and GSK3ß/BCL-XL signaling pathways.

CaMKIIγ regulates the viability and self-renewal of acute myeloid leukaemia stem-like cells by the Alox5/NF-κB pathway.

Acute myeloid leukaemia (AML) is a frequently fatal malignant disease of haematopoietic stem and progenitor cells. The molecular and phenotypic characteristics of AML are highly heterogeneous. Our previous study concluded that CaMKIIγ was the trigger of chronic myeloid leukaemia progression from the chronic phase to blast crisis, but how CaMKIIγ influences AML stem-like cells remains elusive. In this study, we found that CaMKIIγ was overexpressed in AML patients and AML cell lines, as measured by qRT-PCR and Western blot assays. Moreover, CaMKIIγ decreased when the disease was in remission. Using an shRNA lentivirus expression system, we established CaMKIIγ stable-knockdown AML cell lines and found that knockdown of CaMKIIγ inhibited the viability and self-renewal of AML stem-like cell lines. Additionally, the ratio of CD34 + AML cell lines decreased, and CaMKIIγ knockdown induced the downregulation of Alox5 levels. We further detected downstream molecules of the Alox5/NF-κB pathway and found that c-myc and p-IκBα decreased while total IκBα remained normal. In conclusion, our study describes a new role for CaMKIIγ as a stem-like cell marker that is highly regulated by the Alox5/NF-κB pathway in AML stem-like cells. CaMKIIγ can participate in the viability and self-renewal of AML stem-like cells by regulating the Alox5/NF-κB pathway.

Examination of Ureaplasma urealyticum and Mycoplasma hominis in 4082 Chinese patients

The objective of this study was to analyze the infection rate and drug resistance of Ureaplasma urealyticum (UU) and Mycoplasma hominis (MH) in the genitourinary tract of Chinese patients. From December 2018 to June 2019, vaginal secretion or urinary secretion of outpatients in our hospital were selected for culture and drug sensitivity analysis of Ureaplasma urealyticum and Mycoplasma hominis. In 4082 Chinese samples, 1567 Mycoplasma were detected, a detection rate of 38.39%, among which 1366 cases were UU single positive, accounting for 33.47%, 15 cases were MH single positive, accounting for 0.36%, 186 cases were UU and MH mixed positive, accounting for 4.56%. The most affected age groups were 21-30 years and 31-40 years, accounting for 19.09 and 15.05%, respectively. The results of drug sensitivity showed that doxycycline, minocycline, josamycin, clarithromycin, and roxithromycin were more sensitive to mycoplasma infection. The distribution of Ureaplasma urealyticum and Mycoplasma hominis in the human genitourinary system and their sensitivity to antibiotics is different for sex and age groups.