1.Nanopore DNA single molecule sensing method and synthetic nanopore fabrication
Jingzhou SI ; Xiulan CHENG ; Lingzhi CHEN
International Journal of Biomedical Engineering 2009;32(6):353-358,封3
Nanopore single molecule sequencing(SMS) is considered as one of the most promising third generation DNA sequencing method by virtue of fast sequencing and low cost. As the most significant part of the sequencing system, the synthetic solid nanopore has recently been the research highlight in the field of nanopore DNA sequencing because of its fine-controlled size, high reliability and wide applicability. Also, its fabrication method is currently one of the main challenges in this field. In this article, the principles of the nanopore SMS are introduced followed by the review of the difficulties and challenges in the current research stage with emphasis on the nanopore fabrication methods.
2.Effect of Carvacrol on the Biological Behavior of Leukemia Cells and Its Mechanism.
Yan LIANG ; Ai-Ying YANG ; Min LIU ; Yan-Juan CHENG ; Si-Bin ZANG ; Jun HUANG ; Yuan-Yan TANG ; Zhi-Ping HUANG
Journal of Experimental Hematology 2022;30(2):393-399
OBJECTIVE:
To explore the effect of carvacrol on the biological behavior of leukemia cells and its regulation to circ-0008717/miR-217 molecular axis.
METHODS:
Human acute lymphoblastic leukemia cells Molt-4 were cultured in vitro, and different concentrations of carvacrol were added to the cells. si-NC and si-circ-0008717 were transfected into Molt-4 cells (si-NC group, si-circ-0008717 group). pcDNA, pcDNA-circ-0008717, anti-miR-NC, anti-miR-217 were transfected into Molt-4 cells and then added to carvacrol-treated cells (carvacrol+pcDNA group, carvacrol+pcDNA-circ-0008717 group, carvacrol+anti-miR-NC group, carvacrol+anti-miR-217 group). MTT, plate clone formation experiment, and flow cytometry were used to detect the viability of the cell, colony formation number, and apoptosis rate of cells, respectively. The RT-qPCR method was used to detect the expression levels of circ-0008717 and miR-217. The dual luciferase reporter gene experiment was used to detect the targeting relationship between circ-0008717 and miR-217.
RESULTS:
After carvacrol treatment, the cell viability decreased significantly (r=-0.9405), expression level of circ-0008717 decreased (r=-0.9117), colonies formed number decreased (r=-0.9256), while the cell apoptosis rate increased (r= 0.8464), and the expression level of miR-217 increased (r=0.9468). Compared with the si-NC group, the expression level of miR-217 in si-circ-0008717 group increased (P<0.001), the cell apoptosis rate increased (P<0.001), while cell viability decreased (P<0001), the number of colonies formed decreased (P<0.001). Compared with the carvacrol+pcDNA group, the cell viability of the carvacrol+pcDNA-circ-0008717 group increased (P<0.001), the number of colonies formed increased (P<0.001), while the cell apoptosis rate decreased (P<0.001). circ-0008717 could target miR-217. The cell viability of the carvacrol+anti-miR-217 group increased (P<0.001), and the number of colonies formed increased (P<0.001), while the cell apoptosis rate decreased (P<0001) as compared with the carvacrol+anti-miR-NC group.
CONCLUSION
Carvacrol can promote the expression of miR-217 by down-regulating the expression of circ-0008717, thereby reducing the proliferation and cloning ability of leukemia cells and promoting cell apoptosis.
Antagomirs
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Apoptosis
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Cell Line, Tumor
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Cell Proliferation
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Cymenes
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Humans
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Leukemia
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MicroRNAs/genetics*
3.Expression and Clinical Significance of MMSA-8 and MMSA-1 in Bone Marrow of Patients with M2 Acute Myeloid Leukemia.
Yan LIANG ; Ai-Ying YANG ; Min LIU ; Yan-Juan CHENG ; Si-Bin ZANG ; Jun HUANG ; Yuan-Yan TANG ; Zhi-Ping HUANG
Journal of Experimental Hematology 2022;30(4):1018-1021
OBJECTIVE:
To detect the expression of multiple myeloma-associated antigen (MMSA)-8 and MMSA-1 in bone marrow mononuclear cells of patients with acute myeloid leukemia, and explore their roles in acute myeloid leukemia.
METHODS:
A total of 83 patients with M2 acute myeloid leukemia in our hospital from January 2019 to January 2020 were selected as research group, during the same period, 15 patients diagnosed iron deficiency anemia were selected as control group. Real-time fluorescence quantitative PCR was used to detect the levels of MMSA-8 and MMSA-1 in bone marrow mononuclear cells. Patients in the research group were divided into remission and non remission according to the clinical curative effect, and were divided into good prognosis, medium prognosis, and poor prognosis according to the prognosis. The relationship between MMSA-8, MMSA-1 and clinical efficacy, prognosis was analyzed. In addition, the general data of patients in the research group were collected, including white blood cell count (WBC), hemoglobin (Hb), platelet count (PLT), and percentage of bone marrow progenitor cells at admission. Pearson method was used to analyze the correlation between MMSA-8, MMSA-1 and clinical data, and MMSA-8 and MMSA-1.
RESULTS:
The analysis results about mRNA levels of MMSA-8 and MMSA-1 in bone marrow mononuclear cells of patients showed that patients in the research group were significantly higher than those in the control group (P<0.05); In the research group, patients without remission were also significantly higher than those with remission, as well as those with medium and poor prognosis than with good prognosis, while only mRNA level of MMSA-1 in patients with poor prognosis was significantly higher than those with medium prognosis (P<0.05). Pearson analysis showed that MMSA-8, MMSA-1 were positively correlated with WBC (r=0.468, r=0.516), and MMSA-8 was positively correlated with MMSA-1 (r=0.318).
CONCLUSION
The levels of MMSA-8 and MMSA-1 in bone marrow mononuclear cells of patients with M2 acute myeloid leukemia are increased, which are closely related to the occurrence and development of the disease, and have certain value for the prognosis.
Bone Marrow
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Humans
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Leukemia, Myeloid, Acute/genetics*
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Multiple Myeloma/genetics*
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Prognosis
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RNA, Messenger
4.Studying on detecting of spacial clusters of schistosomiasis japonica in mountainous and hilly areas, Hubei Province
Hong ZHU ; Jiali WU ; Bo LI ; Xiaowei SHAN ; Ying XIAO ; Fujie YAN ; Zhen TU ; Jing XIA ; Xiaorong ZHOU ; Lingcong SUN ; Chunli CAO ; Si LIU ; Shizhu LI
Journal of Public Health and Preventive Medicine 2021;32(4):31-35
Objective To understand the application value of spacial clusters detection of human schistosomiasis epidemic,based on small scale level in heavy mountainous and hilly endemic areas, Songzi County,Hubei Province,China. Methods Positive results of human serological detection antibody titer equal or above 80,and positive schistosomiasis cases of fecal examination from 2016 to 2018 as research object in Songzi County.The flexible irregular space scan statistics was used to analyse the spatial clustering analysis of human schistosomiasis epidemic in the heavy mountainous and hilly endemic areas, setting parameter K=2 ,K=6 or K=10, respectively,based on small scale of village level in Songzi County. Results There was none positive schistosomiasis cases of fecal examination in Songzi County from 2016 to 2018.The number of human serological detection antibody titer equal or above 80 were 74, 206, 83, from 2016 to 2018,respectively.There was spatial clusters of positive of human serological detection antibody titer equal or above 80 for schistosomiasis cases in the county from 2016-2018. Areas of flexible irregular space scan statistic in cluster detection changing with the change of different K values. Under different parameters of flexible irregular space scan statistic results show that the most likely cluster of 40 endemic villages in three towns,inculding Laocheng town,Chendian town and Wangjiaqiao town were the prominent. Conclusion There are spatial clusters of human schistosomiasis based on small scale of village level by flexible irregular space scan statistic in mountainous and hilly endemic areas, Songzi County,Hubei Province.Therefore,the monitoring and control of schistosomiasis should be consolidated in the future,in order to achieve schistosomiasis elimination in Hubei Province at an early date.