Molecular mechanism of microRNAs regulating sorafenib resistance in hepatocellular carcinoma / 中国药理学通报

Hepatocellular carcinoma (HCC) is one of the most deadly malignancies in the world, with strong invasiveness, low cure rate, high metastasis rate and poor prognosis. Sorafenib is the most important and effective first-line drug for the treatment of advanced hepatocellular carcinoma, but its clinical efficacy is severely limited by primary and acquired drug resistance. Mi-crornas ( micrornas) are small non-coding Rnas that play a key regulatory role in the occurrence and development of hepatocellular carcinoma and the progression of sorafenib resistance. This paper summarizes the role of micrornas in the initiation and development of sorafenib resistance in hepatocellular carcinoma, in order to further understand the mechanism of sorafenib anti-hep-atocellular carcinoma, and to provide valuable theoretical basis for clinical targeted therapy and prognosis improvement in hepatocellular carcinoma.

Research Progress of Pseudogenes in Hepatocellular Carcinoma / 肿瘤防治研究

Pseudogenes were initially thought to have no function and were called by aliases, such as "junk genes." With the emergence of large-scale genomics projects and more and more experimental studies, pseudogenes have been shown to play an important role in the occurrence and development of solid tumors, especially playing an important regulatory role in the occurrence and develepment of liver cancer, such as regulating the proliferation, apoptosis, invasion, metastasis, and immunity of liver cancer cells. Recent studies showed that pseudogenes can act as regulators of oncogenes and tumor suppressors in hepatocellular carcinoma (HCC) and can thus serve as prognostic markers and even therapeutic targets for this cancer type. In this review, we systematically summarize the mechanisms and functions of different pseudogenes in HCC and present their future prospects as therapeutic targets.

Regulation of mTOR singnaling pathway by microRNA in hepatocellular carcinoma / 国际肿瘤学杂志

MicroRNA (miRNA) is a non-coding small molecule RNA, which is involved in the occu-rrence and development of tumor as an oncogene or tumor suppressor gene. The abnormal expression of many kinds of miRNAs in hepatocellular carcinoma (HCC) can directly or indirectly act on PI3K, Akt, mTOR, IGF-1R, TGF-β and other signal molecules in mTOR signal pathway, they are crucial in the appreciation, invasion and metastasis of HCC cells.

Regulation of mTOR singnaling pathway by microRNA in hepatocellular carcinoma / 国际肿瘤学杂志

MicroRNA (miRNA)is a non-coding small molecule RNA,which is involved in the occu-rrence and development of tumor as an oncogene or tumor suppressor gene. The abnormal expression of many kinds of miRNAs in hepatocellular carcinoma (HCC)can directly or indirectly act on PI3K,Akt,mTOR, IGF-1R,TGF-β and other signal molecules in mTOR signal pathway,they are crucial in the appreciation,inva-sion and metastasis of HCC cells.

Aquaporin 9 and tumor / 国际肿瘤学杂志

Aquaporin 9 (AQP9),one of members of the cell membrane protein family,plays an important role in maintaining metabolism and water balance in vivo.AQP9 could also play an importan role in development of tumors,such as migration,metastasis and apoptosis of tumor cells.In addition,AQP9 is of great significance in judging prognosis of tumors.

Effects of Tcd A on Rho GTPases and the Cytoskeleton of Leukemia Cell Line K562 / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the effect of clostridium difficile toxin A(TcdA) on the Rho GTPases and the cytoskeleton in K562 cells.</p><p><b>METHODS</b>K562 cells were cultured in vitro with different concentration of TcdA.The effect of TcdA proliferation of cells was detected by MTT method after the K562 cells were stimulated with TcdA for 24,48 and 72h; the expression of cdc42, RhoA, Rac1 mRNA was assessed by RT-PCR; the changes of the microtubule, the microfilament were observed by confocal laser scanning microscopy.</p><p><b>RESULTS</b>The proliferation of K562 cells was inhibited after exposure to TcdA for 24, 48 and 72h, and the inhibitory rate was 47.67% in the treatment for 48 h. the cdc42，RhoA and Rac1 mRNA expressions in the experimental groups decreased after treated with TcdA(P<0.05), which positively correlated with concentration of TcdA. Also, the microfilament decreased ,which was observed by confocal laser scanning microscopy.</p><p><b>CONCLUSION</b>TcdA inhibites K562 cell proliferation and induces apoptosis, TcdA can change the cytoskeleton structure through the cytoskeletal protein genes cdc42 and RhoA, Rac1 mRNA expression,. It is related with cell microfilament content decreasing.</p>

Expressions of miR-20a-5p/miR-20b-Sp in gastric cancer cells and gastric carcinoma tissues and enriching analysis of their target genes and signal pathways / 临床检验杂志

Objective To investigate the expressions of miR-20a-5p/miR-20b-5p in gastric cancer cells and gastric carcinoma tissues,analyze their target genes and enriching signal pathways using bioinformatics methods,and explore their biological behavior and function.Methods The expression levels of miR-20a-5p/miR-20b-5p in gastric cancer cells with different differentiation such as high,middle or low differentiation,normal gastric mucosa cells,gastric cancer tissues and adjacent tissues were detected by real-time fluorescent quantitative PCR,and their clinical significance was analyzed.The target genes of miR-20a-5p/miR-20b-5p were predicted using 10 softwares affiliated to mirWALK web database,and the genes supported by more than three softwares were selected as target genes.The signal pathways of target genes were enriched by online DAVID 6.7 software.Results The expression levels of miR-20a-5p/miR-20b-5p in gastric cancer cells with different differentiation were significantly higher than that in normal gastric mucosa cells (all P ＜0.05),and that in gastric cancer tissues higher than adjacent tissues (P ＜ 0.05).The up-regulated expression of miR-20b-5p was closely related to lymph node metastasis and invasion depth (all P ＜ 0.05).Bioinformatics analysis showed that the enriched target genes of miR-20a-5p/miR-20b-5p existed in multiple signaling pathways associated with cancer.Conclusion MiR-20a-5p/miR-20b-5p may be a promising biomarker of gastric cancer,which is highly expressed in gastric cancer and is related to lymph node metastasis and invasion depth.

Activating blood circulation to remove stasis treatment of hypertensive intracerebral hemorrhage: A multi-center prospective randomized open-label blinded-endpoint trial / 中国结合医学杂志

<p><b>OBJECTIVE</b>To investigate the efficacy and safety of the Chinese herbal therapeutic regimen of activating blood circulation (TRABC) in treatment of hypertensive intracerebral hemorrhage (HICH).</p><p><b>METHODS</b>This was a multi-center prospective randomized open-label blinded-endpoint (PROBE) trial with HICH admitted to 12 hospitals. Totally 240 participants were randomized to the treatment group treated with TRABC in addition to conventional Western treatment or the control group with conventional Western treatment equally for 3 months. Primary outcome was degree of disability as measured by modified Rankin Scale (mRS). Secondary outcomes were the absorption of hematoma and edema, National Institutes of Health Stroke Scale (NIHSS) scores and patient-reported outcome measures for stroke and Barthel activities of daily living index. Adverse events and mortality were also recorded.</p><p><b>RESULTS</b>After 3 months of treatment, the rate of mRS 0-1 and mRS 0-2 in the treatment group was 72.5% and 80.4%, respectively, and in the control group 48.1% and 63.9%, respectively, with a significant difference between groups (P<0.01). Hematoma volume decreased significantly at day 7 of treatment in the treatment group than the control group (P=0.038). Average Barthel scores in the treatment group after treatment was 89.11±19.93, and in the control group 82.18±24.02 (P=0.003). NIHSS scores of the two groups after treatment decreased significantly compared with before treatment (P=0.001). Patient-reported outcomes in the treatment group were lower than the control group at day 21 and 3 months of treatment (P<0.05). There were 4 deaths, 2 in each group, and 11 adverse events, 6 in the treatment group and 5 in the control group.</p><p><b>CONCLUSION</b>The integrative therapy combined TRABC with conventional Western treatment for HICH could promote hematoma absorption thus minimize neurologic impairment, without increasing intracerebral hematoma expansion and re-bleeding.</p>

Effects of Aqueous Extracts of Codonopsis Radix on MicroRNA Expression Profiling of D-galactose Induced Kidney of Aging Mice / 中国中医药信息杂志

Objective To explore the effects of aqueous extracts of Codonopsis Radix onD-galactose induced aging model mice; To discuss the anti-aging molecular mechanism of Codonopsis Radix.Methods Subcutaneous injection ofD-galactose solution was used to establish aging models. 100 Kunming mice were divided into normal control group, model group and low-, medium-, high-dose of Codonopsis Radix interventional groups randomly, 20 mice in each group. Low-, medium-, high-dose of Codonopsis Radix interventional groups were given relevant dosage for gavage, while normal control group and model group were given the same volume of NS by gavage for 42 d. After treatment for 42 days, the BUN and CREA in mouse serum were examined; the AffymetrixmiRNA 4.0 microarray was employed to identify the differentially expressed microRNA (miRNA) related with these processes; the bioinformatic tools were also used to further analyze the cluster of miRNA microarrys and the pathways which the target genes of miRNA were involved in.Results Compared with normal control group, the levels of BUN and CREA in mouse serum increased in model group (P<0.05); compared with model group, the levels of BUN and CREA in Low-, medium-, high-dose of Codonopsis Radix interventional groups decreased, in which high-dose of Codonopsis Radix could most significantly inhibit the level of BUN (P<0.05); the cluster analysis showed the miRNA expression profilings of high dose of Codonopsis Radix interventional group and normal control group were brought together, while the profiling of model group was clearly divided with the other groups. In model group vers normal control group, 36 differentiated expressed miRNA showed, which predicated in 10 main biological functions. In high-dose of Codonopsis Radix interventional group vers model group, 34 differentiated expressed miRNAs in high-dose of Codonopsis Radix interventional group showed, and the analytical results of biological functions of target genes were the same as those of model group vers normal control group.Conclusion In the anti-aging process, Codonopsis Radix can not only influence the miRNA expression profiling, but also influence its functional environment.

Effect of blood activating stasis removing method on prognosis of intracerebral hemorrhage patients / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the clinical effect and safety of blood activating stasis removing method (BASRM) on intracerebral hemorrhage patients.</p><p><b>METHODS</b>A multi-center, prospective, randomized, open, controlled and blinded endpoint design was adopted. Totally 228 intracerebral hemorrhage patients were assigned to the treatment group and the control group, 114 in each group by center randomized method. All patients received basic treatment of Western internal medicine. Patients in the treatment group received intravenous infusion with Xingnaojing Injection (XI) from the 1st day of grouping, 20 mL per day for 14 days. Then they took or were nasally fed with Chinese medical granules (by syndrome typing as complicated with wind syndrome, fire syndrome, and phlegm syndrome) for 21 days. Finally they took Naoxueshu Oral Liquid (NOL), 10 mL each time, 3 times per day till the 3rd month of incidence. Patients' disability degree, activities of daily living, neurological impairment, the effective rate, physiologic functions, mental status, social relationship, and degree of treatment satisfaction were assessed using Modified Rankin Scale (MRS), Barthel index (BI), National Institute of Health Stroke Scale (NIHSS), and patient reported outcome (PRO). Head CT was performed to evaluate the absorption of hematoma at the 1st and 7th day of grouping. The safety was also assessed.</p><p><b>RESULTS</b>Totally 108 patients in the treatment group and 112 patients in the control group completed the trial. There was no statistical difference in the total effective rate between the two groups after 3 months of treatment (P>0.05). The MRS score was obviously lower in the treatment group than in the control group (P<0.01) at month 3 after attack (P<0.01). There was statistical difference in the difference between pre-post hematoma volume between the two groups after 7-day treatment (P<0.05). The NIHSS score of two groups at the 7th, 14th, 21st day, and 3rd month decreased significantly (P<0.05). Compared with the control group, the decremenit of NIHSS score decreased more obviously in the treatment group at day 7, 21, and 3rd month (P<0.05). Compared with the control group, the BI increased (P<0.01); physiologic fupctions, social relationship, treatment satisfaction and total score in PRO scale were all lower in the treatment group than in the control group (P<0.05, P<0.01). The incidence of adverse events occurred in 7 cases (6.14%) in the treatment group and 5 cases (4.39%) in the control group, with no statistical difference (P>0.05).</p><p><b>CONCLUSION</b>BASRM could lower the deformity rate of intracerebral hemorrhage patients at month 3, effectively promote hematoma absorption within 7 days, improve neurologic impairment, and elevate living abilities at month 3 of onset.</p>

Effects of the Combination of Emodin and 3'-Azido-3'-Deoxythymidine on Proliferation and Apoptosis in leukemia KG-1a cells Transfected with Egr-1 siRNA / 中国实验血液学杂志

<p><b>OBJECTIVE</b>This study was aimed to investigate the effects of emodin combined with 3'-azido-3'-deoxythymidine (AZT) on proliferation and apoptosis of leukemia cell line KG-1a cells and its mechanism.</p><p><b>METHODS</b>KG-1a cells were transfected with Egr-1 siRNA by electroporation and divided into blank control (KG-1a), nonspecific control (KG-1a/NC) and Egr-1 siRNA (KG-1a/siRNA) groups. Transfection efficiency was tested through fluorescence microscopy and flow cytometry and the transfection effect was detected by using qPCR. The cell proliferation rate was detected with MTT method. After the cells were treated with 10 µmol/L of emodin, 3200 or 1600 µmol/L of AZT and their combinations, the proliferation inhibition rates and the apoptosis rates of cells in 3 groups were detected with MTT method and FCM, respectively.</p><p><b>RESULTS</b>The transfection efficiency of Egr-1 siRNA was found to reach more than 59.21%; as compared with blank control(KG-1a) and nonspectic control(KG-1a/NC), the cell proliferation in Egr-1 siRNA group significantly reduced (P<0.01). The combination of emodin and AZT had considerable synergistic inhibitory effects on proliferation of normal KG-1a cells and nonspecific control(KG-1a NC) cells, but the synergistic effects disappeared after Egr-1 gene silencing.</p><p><b>CONCLUSION</b>The effects of the combination of emodin and AZT on proliferation and apoptosis may be related with Egr-1.</p>

Effect of Emodin Combined with AZT on the Proliferation and the Expression of BCL-2, NF-κB, TGF-β in the Leukemia Stem Cells-KG-1a cells / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the effect of Emodin combined with 3'-azido-3'-deoxythymidine (AZT) on the proliferation and apoptosis of concentrated leukemia stem cells (CLSC)-human acute myeloid leukemia KG-la cells and expression of BCL-2, NF-κB and TGF-β.</p><p><b>METHODS</b>The tumor stem cell-like subpopulation in human leukemia cell line KG-1a was enriched with 5-fluorouracil (5-FU). The CD34⁺ CD38⁻ subpopulation in the KG-1a cells was detected with flow cytometry, the cell proliferation was detected by MTT method to study the of Emodin and AZT in the CLSC. The cell apoptosis was analyzed by flow cytometry. The expression of NF-κB, BCL-2 and TGF-β mRNA and proteins were measured with RT-PCR and Western blot respectively.</p><p><b>RESULTS</b>As compared with cells treated with mentioned above drugs alone, the inhibition of proliferation potential and apoptosis rate of cells in combination group markedly increase with time and concentration dependent member (P < 0.01), the expression of NF-κB, BCL-2 and TGF-β mRNA and proteins decreased.</p><p><b>CONCLUSION</b>Emodin combined AZT can synergistically inhibit the proliferation, induce cell apoptosis, and down regulate the expression of NF-κB, BCL-2 and TGF-β mRNA and proteins in the CLSC, the possible mechanism of synergistic effect may be associated with inhibiton of BCL-2 activation and down-regulation of the expression of NF-κB, and TGF-β.</p>

Application of regional arterial infusion chemotherapy in short-term neoadjuvant chemotherapy for advanced gastric cancer / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To explore the feasibility of short-term neoadjuvant chemotherapy (NACT) in patients with advanced gastric cancer (AGC), and to compare clinical efficacy of short-term neoadjuvant chemotherapy with different ways.</p><p><b>METHODS</b>Clinical data of 310 AGC patients treated with one course of NACT using EOF regimen(epirubicin, oxaliplatin and fluorouracil plus calcium folinate) in our hospital from January 2008 to December 2011 were retrospectively analyzes. Efficacy was compared between regional arterial infusion chemotherapy and intravenously chemotherapy.</p><p><b>RESULTS</b>All the 310 AGC patients completed one course of NACT and none was interrupted by adverse events. Postoperative pathological remission rate was 33.9% (105/310) and 5 patients (1.6%) had complete pathological remission. The pathologic response rate in the regional arterial infusion chemotherapy group was higher than that in the intravenously chemotherapy group(42.4% vs. 23.6%, P = 0.001). Multivariate analysis revealed that chemotherapy method(HR=1.827, 95% CI:1.006-3.316, P = 0.048) was associated with significantly higher pathologic response.</p><p><b>CONCLUSIONS</b>Pathological response rate is quite low following short-term NACT. Regional arterial infusion chemotherapy with short-term NACT can improve the pathological response rate of advanced gastric cancer.</p>

Effects of AZT on leukemia cell line KG-1a proliferation and telomerase activity / 中国实验血液学杂志

This study was purposed to investigate the effect of 3'-azido-2', 3'-dideoxythymidine (AZT)on the proliferation and telomerase activity of human acute myeloid leukemia cell line KG-1a. The effect of proliferation was detected by MTT assay after the KG-1a cell were stimulated for 24, 48 and 72 h with different concentrations of AZT; telomerase activity was detected with TRAP-PCR-ELISA assay; RT-PCR was used to detect telomerase hTERT mRNA expression. The results showed that the proliferation of KG-1a cells was inhibited in a time and concentration dependent manner after exposure to AZT for 24, 48 and 72 h; the KG-1a cells decreased in S phase and increased in G(2)/M phase with the increasing of the concentration of AZT; telomerase activity and hTERT-mRNA expression in the experimental groups decreased after treated with AZT, which was positively correlated with concentration of AZT. It is concluded that AZT inhibits KG-1a cell proliferation and induces apoptosis, which maybe related with its decreasing the telomerase activity and hTERT mRNA expression.

The influence of the total flavonoids of Hedysarum polybotry on the proliferation, cell cycle, and expressions of p21Ras and proliferating cell nuclear antigen gene in erythroleukemia cell line K562 / 中国结合医学杂志

<p><b>OBJECTIVE</b>To investigate the effect of total flavonoids of Hedysarum polybotry on the proliferation, cell cycle, and expressions of p21(Ras) and proliferating cell nuclear antigen (PCNA) gene in erythroleukemia cell line K562.</p><p><b>METHODS</b>The effect of total flavonoids of Hedysarum polybotry on K562 cell line survival was determined by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) reduction assay. The time- and dose-dependent manner was also observed. The cell cycle and apoptosis were analyzed with flow cytometry (FCM). The immunocytochemistry method was applied to quantitatively analyze the effects of flavonoids of Hedysarum polybotry on changes p21(Ras) and PCNA gene expressions.</p><p><b>RESULTS</b>Flavonoids of Hedysarum polybotry (20-100 μg/mL) significantly inhibited the proliferation of K562 cells in a time- and dose-dependent manner. After K562 cells were cultured for 48 h, total flavonoids of Hedysarum polybotry had no significant effect on the apoptosis of K562 cells but showed significantly inhibition (P<0.01), indicating that total flavonoids of Hedysarum polybotry could induce K562 cells arrested at G(0)/G(1) and G(2)/M phases. Compared with the control group, p21(Ras) and PCNA gene expressions were decreased significantly in K562 cells treated with total flavonoids of Hedysarum polybotry (40 and 80 μg/mL, respectively) for 48 h.</p><p><b>CONCLUSION</b>The inhibitory effect on proliferation of K562 cells was observed in the groups treated with flavonoids of Hedysarum polybotry, which might be related to cells arresting.</p>

Apoptosis-inducing effect of clostridium difficile toxin A on K562 cells and its mechanism / 中国实验血液学杂志

This study was purposed to investigate the growth inhibition and apoptosis-inducing effect of Clostridium difficile toxin A (TcdA) on the leukemia cell line K562. The proliferative activity of K562 cells exposed to Tcd A was tested by MTT assay, cell apoptosis was detected by flow cytometry; immunocytochemistry and colorimetric assay were employed to detect the protein expressions of BCL-2/BAX and the activity of Caspase-3, respectively. The results indicated that the proliferation of K562 cells was inhibited in a time-and dose-dependent manner after exposure to Tcd A for 24, 48 and 72 hours, the cells displayed the typical apoptotic, morphological changes, the expression of BCL-2 protein was down-regulated but the expression of BAX protein was signficantly increased, compared with control group (p < 0.05). In addition, caspase-3 was activated in a concentration-dependent manner. It is concluded that Tcd A inhibits cell growth of K562 by inducing apoptosis, and the up-regulation of BAX protein and activation of caspase-3 may play important roles in these processes.

Effects of Clostridium difficile toxin a on proliferation of K562 cells / 中国实验血液学杂志

This study was aimed to investigate the effect of clostridium difficile toxin A (Tcd A) on proliferation of K562 cells and its mechanism. The proliferative activity of K562 cells exposed to Tcd A was tested by MTT assay; cell cycle distribution and mitochondrial membrane potential were analyzed by flow cytometry; the protein expression of cytochrome C and DNA fragmentation were observed by immunohistochemistry staining and agarose gel electrophoresis respectively. The results indicated that Tcd A inhibited proliferation of K562 cells in a time-and concentration-dependent manner. Cells were arrested at G(0)/G(1) phase. Peak of apoptosis appeared. The protein expression of cytochrome C increased as compared with control group (p < 0.05). Agarose gel electrophoresis of DNA from K562 treated with Tcd A revealed a "ladder" pattern. It is concluded that clostridium difficile toxin A can inhibit proliferation and induce apoptosis of K562 cells. The mechanism may be in relation to decrease of mitochondrial membrane potential and the release of cytochrome C from mitochondria matrix.

Serum sialic acids in the diagnosis of digestive tract tumor / 中华健康管理学杂志

Objective To investigate serum levels of sialic acids(SA)vs carcino-embryonic antigen(CEA)for the diagnosis of digestive tract cancer.Methods Sixty healthy adults,100 patients with malignant digestive tract tumor and those undergoing radical digestive tract tumor surgery were enrolled in this case-control study.Serum SA level was tested.Serum CEA level was measured by electrochemical luminescence.Sensitivity and specificity of SAvs CEA were calculated.Receiver operating characteristic (ROC)curve and area under the curve(ROC-AUC)were used to evaluate the diagnostic value of SA.Results Serum level of SA of patients with digestive malignant tumors was much higher than the normal controls(P ＜0.01),although serum SA of patients undergoing tumor resection showed no difference with the normal controls(P ＞ 0.05).There was significant difference in SA level between the patients who received surgical therapy or not.The sensitivity and specificity of SA in diagnosing digestive tract cancer was 55.00％ and 93.3％,respectively.The false positive rate was 6.7％ in normal subjects.Conclusion Serum SA or CEA testing may be equally useful in the screening,diagnosis,outcome assessment and followup study of digestive tract cancer.

Study on promotion of growth hormone for colorectal cancer cell proliferation / 肿瘤研究与临床

Objective To detect the expression of GHR in colorectal cancer cell lines and determine whether recombinant human growth hormone can promote the proliferation of colorectal cancer cells in vitro.Methods GHR distribution was assessed by flow cytometry and immunofluorescence method in 9 colorectal cancer cell lines.The effect of recombinant human growth factor on colorectal cancer cell line proliferation was assessed by MTT method.Results Different GHR expression was determinated in 9 colorectal caner cell lines.GHR was highly expressed in HCT-8 while GHR expression could hardly be detected in LoVo.r-hGH could promote GHR(+) HCT-8 cell proliferation at 50 ng/ml and 100 ng/ml (P ＜0.05).But this effect was not dose dependent.When the neutralizing antibody was used to block GHR activity,this r-hGH dependent proliferation effect was eliminated.r-hGH could not promote GHR (-) LoVo cell proliferation (P ＞0.05).Conclusion The results demonstrates that r-hGH could promote GHR (+) tumor cell proliferation and this effect is mediated by GHR.The use of r-hGH on the colorectal cancer patients should be cautious.

Effect of Total Flavonoids of Hedysarum Polybotry on Inducing Differentiation of Leukemic Cells / 中国中医药信息杂志

Objective:To investigate the effect and mechanism of total flavonoids of Hedysarum polybotry on induction of differentiation in human leukemia HL-60 cells. Method After the treatment of HL-60 cells with total flavonoids of Hedysarum polybotry, the cell differentiation was detected with NBT reduction method. Cell cycle, CD11b and C-fos were analysed by the flow cytometry. Result The positive rate of NBT reduction and the expression of CD11b were significantly increased. Similar, the expression of C-fos gene was upregulated. The growth of HL-60 cells was arrested at G0/G1 and G2/M phase. Conclusion Total flavonoids of Hedysarum polybotry could induce differentiation of HL-60 cells. Its molecular mechanism might be related to the modulation of gene expressions associated with the proliferation and differentiation, which leads to the inhibition of DNA synthesis.