Leukocytes from peripheral blood of 70 normal Chinese,40 males and 30 females, were cultured in vitro according to a modification of Moorhead's method.Chromosome studies were carried out.Table I lists the results obtained including age group,metaphase plates counted and analysed and the chromosome number of each cell.92.4 per cent of 8031 counted cells had the diploid number(2n=46).Chromosome measurements were made from camera lucida drawings.Measurements were estimated to the nearest 0.1 mm on a fine metric scale.The relative length,arm ratio and centromere index of each chromosome were calculated from measurements of 18 haploid chromosome sets of 11 metaphase plates in 6 males and 4 females.The averages,range of variation and 99% confidence limits are listed in Table Ⅲ.Systematic studies of individual chromosomes under the light microscope revealed the following morphological characteristics.The short arms of all 10 acrocentric chromosomes from groups 13—15 and 21—22 could be shown to possess satellites,but in general only 2—8 of these chromosomes at a time carried satellites.In many cells the satellite-carrying chromosomes tended to associate with each other through their satellites.The number of chromosomes involved in each association varied between 2 to 5,occasionally 6.It was not rare to find secondary constrictions to occur regularly in certain regions of chromosomes 1,4,9,13,and 16.Attachments of satellites to such regions of chromosomes 1,4,9,and 13 were also observed.Karyotypic analysis of 357 metaphase plates led us to conclude that in most cases the unequivocal identification of chromosome pairs 4—5,6—12+X,13—15,19—20,and 21—22 was im- possible.Accurate characterisation of these chromosome pairs will have to await further technical advances. The length of the Y chromosomes was systematically measured in order to deter- mine its variability and heritability.Among our sample of 40 male subjects 29 had a Y chromosome slightly larger than chromosome 21,8 slightly smaller or larger than chromo- some 18(long Y chromosome),and 3 smaller than chromosome 21(short Y chromo- some).The heritability of the size of the Y chromosome was established(Fig.Ⅳ). “Spontaneous”aberrations were discovered in 34 of 70 cases.Aberration rates varied from 0.88 to 13 per cent.The relation between aberrations and radiation injuries was briefly discussed.

Recent research has gained much depth and details on the response-to-therapy assessment system (RTAS) of DTC. The concept of RTAS was first proposed in the 2015 ATA guidelines, mainly advocating dynamic and ongoing assessment of a disease process after primary therapy is completed. This recommendation is to compensate for the deficiency of a static, single-parametric evaluation system that is conventionally pathology-dominated. The concept of risk-adaptive management has been adopted in individual decision-making processes, so as to tailor treatment plans accordingly with an understanding that therapies (e.g. surgery, etc.) should also be involved as a continuum of risk assessment. The RTAS according to the new guidelines has been clearly highlighted worldwide. This review aims to outline the progress and latest update of RTAS on DTC.

The serum concentration of vitamin A (VA) and B-carotene were determined in 50 healthy pregnant women in the later trimesters and parturition, their newborns and 20 non-pregnant women. In the meantime the contents of placental tissues were determined too. The results showed; 1. The serum VA content(2.17 umol/L, 62ug/dl)of pregnant women in the later trimesters was higher than that of non-pregnant women (1.37umol/L, 39ug/dl), but it decreased immediately after delivery. 2. There was no significant def-ference of the serum B-carotene concentration between the pregnant women and non-pregnant women. 3. The cord blood VA and B-carotene contents were much lower than those of maternal blood. 4. The contents of B-caro-tene in placentas were 9.6 times as much as VA. 5. The efficiency of transport of B-carotene from maternal blood to placental tissue was higher than that of VA, and lower than that from placenta to cord blood.

Although intensive chemotherapy and hematopoietic stem cell transplant (HSCT) are currently used in the treatment of acute myeloid leukemia (AML),a large proportion of patients relapse after treatment.On the other hand,a minority of cases fail to achieve complete remission (CR) after a standard first line treatment.Leukemia relapse and refractory become the main course of treatment failure,which are also the main points and difficulties of treatment for AML.However,the most effective regimen for refractory/relapsed AML has not been established.This review focuses on the progress of the regimens and major chemotherapy for refractory/relapsed AML (except M3).

Objective To optimize the formulation of controlled-onset extended-release tablets of nicorandilby central composite design-response surface method. Methods The tablets containing nicorandil were prepared bydry-compression coating technique.The influence factors included the amount of HPMC, the amount of EC, and the ratio of lactose/MCC in coating film. The evaluation parameter was Q4 h and Q5 h . The possibly optimal formulation was predicted by response surface method. Results The OD was simulated using second-order polynomial equation and the r2was 0.970 1.Optimal prescription was as follows:HPMC 89.96 mg, EC 46.21 mg, Lactose/MCC 1.87.Bias between the observed and predicted values of the OD was within 0.43%. Conclusion The controlled-onset extended-release tablets of nicorandil can release drug quickly in vitro at the predetermined time.Central composite design-response surface method can be used to optimize the formulation and the model developed in this study was proved highly predictable.

The myelodysplastic syndromes (MDS), which are characterized by the presence of ineffective hematopoiesis and an increased risk of transformation into acute myeloid leukemia (AML), are a group of clonal disorders deriving from damage of the hematopoietic stem/progenitor cells. Researches in the past few years have still highly recommended the pathogenesis,clinical new agents and combination therapy, immunotherapy and hematopoietic stem cell transplantation of the MDS. This article will introduce several highlights of MDS combined with the relevant reports in the 57th American Society of Hematology annual meeting.

OBJECTIVE:To establish a method for the determination of related substances in Levo-cetirizine hydrochloride chewable tablet. METHODS:RP-HPLC was performed on the column of Venusil XBP-CN with mobile phase of acetonitrile-0.05 mol/L Sodium dihydrogen phosphate solution(pH value adjusted to 3.0 by phosphoric acid)(60∶40,V/V)at a flow rate of 1.0 ml/min, the detection wavelength was 230 nm,column temperature was 25 ℃,and volume injection was 20 μl. RESULTS:Levo-cetirizine hydrochloride chewable tablet showed good separation with related substances;the linear range of levo-cetirizine hydrochloride was 1.2-2.8 μg/ml(r=0.999 9);the quantification limit and detection limit was 1.4 ng/ml and 0.3 ng/ml,respectively;RSDs of preci-sion,stability and reproducibility tests were lower than 1%;recovery was 96.3%-105.0%(RSD=1.7%,n=9);the contents of re-lated substances were no more than 0.17%. CONCLUSIONS:The method is simple,sensitive,reproducible,accurate and reli-able,and can be used for the determination of related substances in Levo-cetirizine hydrochloride chewable tablet.

Objective To investigate the clinical characteristics of postmenopausal patients with cervical intraepithelial neoplasia ( CIN) gradeⅡ/Ⅲand cervical cancer . Methods A retrospective analysis was made on the clinical characteristics of 57 cases of postmenopausal patients who were diagnosed as CIN grade Ⅱor above from January 2014 to September 2015.Their age ranged from 49 to 77 (58.2 ±5.6) years old, and the time of menopause ranged from 1 to 36 (9.4 ±6.9) years. Results ①In postmenopausal women with CIN Ⅱ/Ⅲ and cervical cancer, only about 1/5 (11/57, 19.3%) had clinical complaints, and nearly 2/3 (36/57, 63.2%) had smooth cervical appearance .②There were 36 cases of high-risk human papillomavirus ( HPV) (36/39, 92.3%), 20 cases of single HPV16 infection (20/36, 55.6%), 7 cases of HPV16 type and other high-risk HPV infection (7/36, 19.4%), and 9 cases of other types of high-risk HPV infection (9/36, 25.0%).③The positive rate of high-risk HPV was 92.3%(36/39) and the HPV16 positive rate was 69.2% (27/39).TCT examination showed a positive rate of high grade squamous intraepithelial lesion (HSIL) of only 29.6% (16/54), with significant difference (χ2 =6.686 and 14.286, P =0.010 and 0.000, respectively). Conclusions Postmenopausal women with cervical lesions usually have no obvious clinical symptoms . Gynecological examination alone is difficult to judge whether the cervical lesions exist .Strict cervical lesions screening is particularly important .

Objective To investigate the eomman causes of premature delivery,the tocolytic effect and suc-cess ratio and the birth situation of premature infants. Methods 150 pregnant women with natural delivery or iatro-genie preterm labor from 28 weeks to 34 weeks who carried out tocolytic therapy because of threatened preterm labor or premature delivery after tocolytic therapy were selected. The common inducement of premature delivery, the pro-longed gestational weeks, the success ratio of tocolyis and the birth situation of premature infants were retrospectively analyzed. Results The premature rupture of membranes(PROM) ,the spontaneous uterine contraction and iatrogenic preterm labor were the main reasons of premature labor. The primiparas are the majority. The iatrogenic partus pre-maturus were prolonged, the asphyxia rate of premature infants was still high. The incidence of premature rupture of fe-tal menbranes in pregnant with tocolytic therapy beyond 1 week was 3. 3% ,and the incidence of spontaneous urerine contraction was 4. 8%. Conclusion Antenatal care and prenatal diagnosis are important to decrease the premature labor ratio as early as possible to use the D. X. M to promote the fetal lung maturity, so as not to delay the treatment.

Objective To investigate the effect of early rehabilitation treatment in the patients with small cerebral hemorrhage and its possible mechanisms .Methods 133 patients with cerebral hemorrhage were randomly divided into the routine treatment , non-early rehabilitation and early rehabilitation groups and given the routine drug treatment .The early rehabilitation group and the non-early rehabilitation group were additionally given the rehabilitative training after 2 d and 14 d respectively .The scores of Fugl-Meyer reassessment and the Barthel index were assessed before training and after 4-week training ,and the serum levels of circulat-ing endotheial progenitor cells(EPCs) and vascular endotheial cell growth factors(VEGF) were detected .Results Compared with the routine treatment group and the non-early rehabilitation group ,the scores of Fugl-Meyer reassessment and the Barthel index af-ter treatment in the early rehabilitation group were significantly increased (P< 0 .01) .The serum levels of circulating EPCs and VEGF in the early rehabilitation group were also significantly increased compared with the routine treatment group control (P<0 .01) .Conclusion Early rehabilitation treatment can obviously improve the limb movement function and the daily living ability in the patients with small cerebral hemorrhage ,its mechanisms may be involved with the increase of circulating EPCs and VEGF .