Chronic myeloid leukemia (CML) is a malignant clonal proliferative disease,which originates from multifunctional hematopoietic stem cells of bone marrow.Imatinib is used as the first-line treatment for CML currently,owing to its obvious curative effect for patients in chronic phase and survival time prolonged significantly for patients in accelerated phase and blast crisis.With the long-term application of imatinib in clinic,the drug resistance and intolerance gradually appear,resulting in decreased long-term effects of CML.This paper will review the current status of the pathogenesis and treatment of CML.

Objective To investigate the antithrombotic effects of polydatin.Methods Injection of arachidonic acid into mouse,electrically stimulated carotid artery and inferior vein ligation in rats were used to evaluate polydatins antithrombotic effects respectively.Results Polydatin presented obvious antithrombotic effects in three thrombotic models and showed a good dose-effect relationship.Conclusion It is suggested that polydatin has evident antithrombotic effects in artery,vein and micro-circulation.

The factors influencing public access to life science information were analyzed from its scope, cost, chan-nels, mechanisms and laws with suggestions put forward for the access to life science information without any barrier.

ObjectiveTo discuss clinical application value of contrast-enhanced ultrasound(CEUS) technology in the diagnosis of liver and spleen trauma. MethodsRetrospective analysis 25 cases of liver and spleen trauma patients, the conventional ultrasonic CEUS complete material, analysis of the liver and spleen damage CEUS performance,and with surgery and computed tomography(CT) strengthen comparative analysis of the sensitivity of the conventional ultrasonic, CEUS, specific degree and the classification accuracy. ResultsAmong the surgery or CT confirmed 23 cases for liver and spleen rupture,the pure 8 cases liver, injury 13 cases of pure spleen rupture ,liver and spleen composite injury in 2 cases. And surgery or CT comparison, the sensitivity of the CEUS and specific degrees were 90.5％ and 66.7％ ,significantly higher than conventional ultrasound 59. 1％ and 33.3％ (P ＜0.05) ;CEUS classification was 91.3％ (21/23), significantly higher than the rules of ultrasound was 65.2％ ( 15/23 ), both differences were statistically significant( P ＜ 0.05). ConclusionCEUS diagnosis liver and spleen, due to the sensitivity of the damage degree high, and the classification accuracy was higher, the diagnosis to accurately evaluate the extent of the damage to the liver and spleen in liver and spleen, the loss of the diagnosis and treatment of clinical guidelines choice had important value of clinical application.

Objective To test the reliability and validity of the Chinese version Diabetea Self-Care Behavior(SDSCA)Questionnaire,and thus to provide an effective and convenient way of self-care behavior assessment for patients with type 2 diabetes.Methods The questionnaire based on the translation of SDSCA wag used in 20 cases of type 2 diabetes patients,in order to analyze the retest rehability,internal consistency and scale construct validity. Results The retest reliability of each dimension wag between 0.763 to 1.000;the scale correlation coeflicients between items in specific diet dimension Wag lowest(0.104),and the others were moderate to high degree of correlation between 0.555～0.933;exploratory factor analysis extracted 4 components,and the percentage of variance explained was 67.483% .Conclusions Chinese version SDSCA has a good reliability and validity,and is good for evaluating the self-care activities in type 2 diabetes patients.

This paper is to report our method to extract a fairly purified lymphocyte chalone-like factor from pig spleen and our observation on its properties and actions.An acetone powder was prepared from pig spleen and it was extracted with redistilled water. After ultracentrifugation, the supernatant was ultrafiltrated and the filtrate was called fraction B. Fraction B was further fractionated by chromato-graphy on Sephadex G-25 Column. 7 peaks were obtained(SP1-SP7)and the strongest biological activity was found in the fraction SP2. It is the lymphocyte chalone-like factor and its molecular weight is 1400.The actions of this lymphocyte chalone was not affected in the condition of incubation when the calf serum of the culture medium was subsituted with human calf serum or different doses of insulin were added to the medium.[3H]-TdR and [3H]-Urd incorporation experiments showed that the inhibition of RNA synthesis of this factor occurred prior to the inhibition of the scheduled DNA synthesis. It is suggested that the mechanism of this lymphocyte chalone actions is likely to inhibit the activation process of some genes, then inhibit the DNA synthesis and block the cells from G1 phase to S phase.

Objective To compare the healing ability differences between left colonic anastomosis and right colonic anastomosis in rats, in order to find a theoretical basis for the surgical management of colon resection. Methods Forty male Wistar rats were randomly divided into two groups: group A (end-to-end anastomosis of right colon, n=20), and group B (end-to-end anastomosis of left colon, n=20). Half of the rats in each group were sacrificed on the fourth day after operation, and the rest on the seventh day. The expressions of matrix metalloproteinase-1 (MMP-1), MMP-13 and collagen type Ⅰ were shown by immunohistochemical staining, and the histopathologic changes at the anastomosis were also demonstrated. Results The expression of MMP-1, MMP-13 at left colonic anastomosis was higher than that of MMP-1, MMP-13 at right colonic anastomosis, the expression of collagen type Ⅰ was lower than that of collagen type Ⅰ at right colonic anastomosis on the fourth day (P<0.05); The expression of MMP-1 at left colonic anastomosis was higher than that of MMP-1 at right colonic anastomosis, the expression of collagen type Ⅰ was lower than that of collagen type Ⅰ at right colonic anastomosis on the seventh day (P<0.05). Conclusions The healing ability of right colonic anastomosis is higher than that of left colonic anastomosis.

With the increasing incidence and high malignancy, pancreatic cancer is still expected to be treated by radical resection. However, because of the unique anatomical and biological features, such as rapid progression, early metas-tasis and direct invasion to the vessels, the resection rate of pan-creatic cancer is still at a lower level. The standard procedures of diagnosis and treatment, including early detection, preopera-tive resectability assessment, and judgement of the resection area based on the tumor staging, benefit the patients and significantly improve the prognosis.

Objective To evaluate the outcomes of microdiscectomy for treatment of recurrent lumbar disc hemiations. Methods There were 18 cases of recurrent lumbar disc berniations accepted microdiscectomy (reoperation group), compared with 30 cases of primary lumbar microdiscectomy (primary group). Operating time, blood loss and length of hospital stay were compared between two groups. MacNab criteria were used to evaluate the outcomes. Results Operating time was a mean of 75 min in reoperation group, 52 min in primary group. Blood loss of reoperation group was 70 ml, 50ml in primary group. Length of hospital stay was 8.5d in reoperation group, 6.5d in primary group. There were one dural tear, two Ls root lesions and 5 more numbness reoperation group, but recovery all patients. There were one dural tear in primary group. 17 cases got follow-up mean 12.1 months in reoperation group and 29 cases in primary group mean 11.8 months. The results demonstrated 88.2% success rate in reoperation group and 93.1% in primary group. There was no significant dif-ference in two groups (P ＞ 0.05). Conclusion Outcomes of Lambar mierodisceetomy with mini-open for treatment of recurrent lumbar disc herniations are similar to primary lumbar mierodiscectomy.

Objective This paper analyzes the spectrum of ultrasonic echo and its change with depth when using dual unipolar pulse excitation.Methods According to the theory of matched filter,a group of aynmic filter was designed to ensure the near-field image resolution while maintaining the sensitivity of far-field image.Results This filter was accomplished in FPGA chip.Conclusion Higher image quality Can obtained applying this filter in the au-digital ultrasonic imaging system compared with those using constant filter.