Matrix metalloproteinases(MMP) are a family of Zn~(2+)-dependent endopeptidases capable of cleaving components of extracellular matrix(ECM).MMP-1 was the first vertebrate collagenase purified as a protein and cloned as a cDNA,and is considered the prototype for all the interstitial collagenases.It is synthesized as a zymogen.Its N-terminal residues are removed by proteolysis and it shares with other MMPs a catalytic domain and a carboxy terminal domain with the sequence similar to hemopexin.(MMP-1) should be considered as a multifunctional molecule since it participates not only in the turnover of collagen fibrils in the extracellular space but also in the cleavage of a number of nonmatrix substrates and cell surface molecules,suggesting an important role in the regulation of cellular behaviour.Furthermore,an extensive body of evidence indicates that MMP-1 plays an important role in diverse physiologic processes such as growth,tissue morphogenesis,and wound repair.Likewise,it seems to be implicated in a variety of human diseases including atherosclerosis,rheumatoid arthritis,pulmonary emphysema,and fibrotic disorders,suggesting that its inhibition or stimulation may open therapeutic avenues.

Objective To observe and analyze the change state of serum inflammatory mediators of patients with secondary septic shock after chemotherapy for acute leukemia .Methods 56 patients with secondary septic shock after chemotherapy for acute leukemiawere were selected as the group A,56 patients without secondary septic shock after chemotherapy for acute leukemia were selected as the group B ,56 healthy persons of the same age were selected as the group C,then the serum inflammatory mediators levels of three groups were detected and compared,and the serum indexes of group A with different severity degree of shock were compared, then the detection results of group A and group B with different types ( lymphocytic leukemia and nonlymphocytic leukemia)were compared.Results The serum inflammatory mediators levels, including TNF-α, IL-4, IL-6, IL-10 and other inflammatory factors, including PGE2 , sICAM-1, sVCAM-1 and sCD44, there were group A >group B >group C, severe shock >moderate shock>mild shock ( all P<0.05 ) .The above serum inflammatory mediators and other inflammatory factors levels of different types in group A were higher than those in group B, and the above mediators in lymphocytic leukemia of group A and group B were higher than those in nonlymphocytic leukemia (all P<0.05).Conclusion The serum inflammatory mediators of patients with secondary septic shock after chemotherapy for acute leukemia show higher expression state,and the influence of shock degree and leukemia types for the expression are great.

Objective To investigate whether nobiletin could enhance chemotherapeutic drug-induced cell proliferation inhibition and apoptosis in breast carcinoma cells MDA-MB-231 in vitro.Methods MDA-MB-231 cells were exposed to nobiletin and different chemotherapeutic drugs at different concentration.The cell proliferation inhibitory rate was observed by MTT,apoptosis was detected by DNA Ladder,flow cytometry (FCM),and ELISA,and an NF-?B electrophoretic mobility shift was conducted by EMSA and ELISA.Results The combination of nobiletin (20 ?mol) with Taxol (1 nmol) or Doxorubicin (50 ng/mL) resulted in a significant inhibitory rate of cell growth and more apoptosis in MDA-MB-231 cells of 75.1% and 82.6% compared with either of them alone (40% and 45%),respectively.DNA Ladder and FCM assay showed that nobiletin could promote the cell apoptosis induced by chemotherapeutic drug.EMSA and ELISA assay showed that nobiletin could inhibit NF-?B activity in nuclear and cytoplasm of MDA-MB-231 cells.Conclusion The current results suggest that nobiletin could enhance the inhibition of chemotherapeutic drug on cell proliferation and cell apoptosis of breast carcinoma cells MDA-MB-231,the mechanism may be related to down-regulate the NF-?B activity in vitro.

Objective To explore whether 5 to -7-day of folic acid supplementation prior to pemetrexed therapy is needed. Methods We retrospectively evaluate the outcomes of non-small cell lung cancer patients received less than the advised folic acid premedication. Seventy patients with Ⅲ-Ⅳ NSCLC were randomly divided into two groups: patients who initiated vitamin supplementation on 7 days before the first dose of pemetrexed (group A) and patients who initiated vitamin supplementation on the day of the first dose of pemetrexed (group B). Results In group A and group B, CR 0 and 0, PR 10 and 8, the response rates of 28.6% and 22.9% were observed, respectively. There was no statistically significant differences between these two groups. No significant differences were observed in the incidence of hematologic and non-hematologic toxicities. Conclusions The initiation of pemetrexed-based chemotherapy does not need to accommodate a vitamin supplementation schedule.

Objective To explore the effects of low density lipoprotein(LDL) containing immune complexes(IC) on the mRNA expression of matrix metalloproteinase-1(MMP-1) and matrix metalloproteinase-1(TIMP-1) in U937 cells.Methods U937 cells were incubated with native LDL,oxidized LDL or LDL-IC,respectively.mRNA expression of matrix metalloproteinase-1(MMP-1) and tissue inhibitor of metalloproteinase-1(TIMP-1) in U937 cells were measured by reverse transcriptase polymerase chain reaction(PT-PCR).Results Normal U937 cells hardly expressed MMP-1,but highly expressed TIMP-1.N-LDL had no effect on the expression of MMP-1 and TIMP-1 mRNA.Ox-LDL can induce slightly expression of MMP-1 and markedly down-regulate expression of TIMP-1.Similarly,nature and oxidized LDL-IC had significantly more effect on the mRNA expressions of MMP-1 and TIMP-1 than that of control(P

BACKGROUND:The basic idea of artificial disc replacement is the intension to minimize the impact on adjacent segments based on the premise of stabilizing index segment, then prevent and reduce the incidence of adjacent segment degeneration.
OBJECTIVE:To explore the indications and contraindications of artificial disc replacement, peri-operative
economics considerations, long-term complications, as wel as the effect of artificial lumbar disc replacement combined with fusion surgery.
METHODS:The PubMed database, CNKI database and SinoMed database over the past decade were searched for the related articles. The retrospective and prospective clinical trials of artificial lumbar disc replacement were included. Repetitive studies and stale perspectives were excluded. A total of 34 articles were summarized and analyzed in the end.
RESULTS AND CONCLUSION:Since the first artificial lumbar disc prosthesis designed to be commercial y
distributed in 1982, there have been a plenty of clinical trials on lumbar disc replacement. However, there is no
answer to many problems that encountered in clinical trials. The effect of the number of replaced segment on the clinical outcomes, the effect of facet joint degeneration on the clinical outcomes, selection of the patients with the history of lumbar disc surgery, age of the patients and the rest time before disc replacement should be taken into consideration in the researches on indications and contraindications of artificial disc replacement. The
intraoperative blood loss, operation time and hospital stay after replacement can be used to evaluate whether lumbar disc replacement is better than the traditional lumbar fusion surgery or not. The complications after lumbar disc
replacement include heterotopic ossification, implants mechanical failure, and facet joint and adjacent segment
degeneration. The combination of lumbar disc replacement and fusion surgery for the treatment of multi-segmental lumbar disc diseases can achieve complement and thus obtaining the efficacy that better than the application of one surgery alone.

BACKGROUND:Artificial Lumbar disc replacement as a new choice for the treatment of degenerative disc disease has aroused widespread concern by clinicians because of the preservation of lumbar vertebra’s biomechanical characteristics during pain eliminating. While the design of the prosthesis structure and material needs further study and validation.
OBJECTIVE:To review the structure and material types of several newly designed artificial lumbar discs, then to discuss the trends in the optimization design of prosthesis, in order to provide instruction for the design and assessment of new lumbar artificial disc prosthesis.
METHODS:The PubMed database, CNKI database and SinoMed database were searched for related articles. New articles related to artificial lumbar disc structure, material, in vivo and in vitro biomechanics were included. Repetitive studies and stale perspectives were excluded. A total of 46 articles were summarized and discussed in the end.
RESULTS AND CONCLUSION:Artificial lumbar disc has developed for nearly 30 years, the design of structure and biological material has been in continuous improvement. At first, we summarized the principle and current situation in the design of movement reservation, movement constraint, instant fixation, base material, weight-bearing material and coating material of artificial lumbar disc prosthesis, then combined with the exist newly in vivo and in vitro biomechanical results to evaluate different kinds of design with the recent research trend to prospect the development of biomimetic design, material improvement, the optimization design of prosthesis and assisted devices.

Objective To evaluate the effects of gestational weight gain(GWG) in different prepregnant body mass index (BMI) women on perinatal outcomes and to provide evidences for gestational weight management protocol.Methods Totally,2409 healthy singleton pregnant women accepted regular prenatal examinations in Nanjing Drum Tower Hospital from January 2009 to April 2010 were recruited in this study.They were divided into three groups according to pre-pregnant BMI,which were low BMI group (BMI＜18.5),normal BMI group (BMI 18.5-) and high BMI group (BMI≥24.0).According to GWG,the difference between pre-delivery maximal weight and prepregnant weight,the low and normal BMI women were divided into ＜10 kg,10 kg-and ≥15 kg GWG subgroups,and the high BMI women were divided into ＜5 kg,5 kg-,10 kg and ≥15 kg GWG subgroups.Data including gestational age,delivery modc,newborns' birth weight,Apgar score and incidences of gestational complications,such as hypertensive disorders complicating pregnancy (HDP),gestational diabetes mellitus (GDM),macrosomia,fetal growth restriction (FGR) and preterm birth,were recorded.Analysis of variance,Student-Newman Keuls,Chi-square test and Fisher exact test were applied for statistics.Results (1) Among the 2409 women,the percentages of low,normal and high BMI groups were 18.5％ (n=445),69.9％ (n=1685) and 11.6％ (n=279),respectively.The incidences of HDP,GDM,macrosomia and caesarean delivery in high BMI group were 12.9％ (n=36),17.9％ (n=50),13.6％ (n=38) and 52.3％ (n=146),respectively,higher than those in low BMI group [3.4％ (n=15),4.3 ％ (n=19),3.8％ (n=17) and 25.8％(n=115),x2 =23.8,37.1,23.5 and 50.2,P＜0.05] and those in normal BMI group [5.5％ (n=92),7.8％ (n=132),7.8％ (n=132)and 31.6％ (n=532),x2=21.8,29.0,10.1 and 3.4,P＜0.05].(2) In normal BMI group,the rates of FGR and preterm birth in GWG ＜10 kg subgroup were 3.5％ (4/115) and 8.7％ (10/115),higher than those in GWG 10 kg-subgroup [0.7％(4/548) and 3.3％(18/548),x2=6.0 and 6.9,P＜0.05] and GWG ≥15 kg subgroup [(0.8 ％ (8/1022) and 3.6％ (37/1022),x2=7.2 and 6.7,P＜0.05].The rates of macrosomia and cesarean delivery in GWG ≥15 kg subgroup were 10.7％ (109/1022) and 34.5％ (353/1022),higher than those in GWG＜10 kgsubgroup [3.5％ (4/115) and 32.2％ (37/115),x2=6.0 and 63.0,P＜0.05] and GWG 10 kg subgroup [3.5％ (19/548) and 25.9％ (142/548),x2=24.7 and 31.0,P＜0.05].(3) In high BMI group,the incidences of all pregnancy complications and perinatal outcomes did not show statistical significance among the four GWG subgroups (P＞0.05).Conclusions High prepregnant BMI is a high risk factor of pregnancy complications.It is suggested that normal BMI women should control GWG at 10-15 kg to lower the incidences of pregnancy complications.

Breast Neoplasms ; therapy ; Female ; Humans ; Induced Pluripotent Stem Cells ; transplantation

Purpose: To observe therapeutic effect of acupuncture plus Methadone on improvement of heroin withdrawal syndrome. Methods: Sixty cases of heroin dependence patients were divided into the treatment group and the control group. The treatment group was given acupuncture plus Methadone, and the control group was treated with Methadone.Results: The score of the withdrawal symptoms was lower in the treatment group than in the control group (P ＜ 0.05). The improvement of withdrawal symptoms was significantly better in the treatment group than in the control group (P＜ 0.05). Conclusion: Acupuncture plus Methadone can significantly improve heroin withdrawal syndrome.