It has been showed that there were obvious obstacle effects of Panax notoginseng replanting. Crop rotation was the main effective technique to overcome the obstacle. To find a reasonable crop rotation system for P. notoginseng, aqueous extracts from root, stem and leaf of P. notoginseng were analyzed for allelopathic effect on three maize varieties (which are often grown in regions where P. notoginseng grown). The main results were as follows: (1) Allelopathic effect of P. notoginseng stem and leaf extracts on the three other tested plants was stronger than that of root extracts; (2) Corn was more vulnerable to the effects of allelochemicals at seedling stage than at germination stage, and the corn root was more sensitive than aerial part to allelochemicals; (3) Lusan No. 3 and Yunrui No. 1 showed resistance to P. notoginseng allelopathy, with respective comprehensive sensitivity indexes (M3) of - 0.089 3 and -0.159 2, while Bainuo No. 1 is sensitive at M3 = -0.261 0. It then can be concluded that Lusan No. 3 and Yunrui No. 1 may be an alternative rotation plants for overcoming P. notoginseng continuous cropping obstacle.
Allelopathy ; Panax notoginseng ; chemistry ; growth & development ; Pheromones ; pharmacology ; Plant Extracts ; pharmacology ; Plant Leaves ; chemistry ; Plant Roots ; chemistry ; Plant Stems ; chemistry ; Zea mays ; drug effects ; growth & development

Objective To explore the interaction characters of fluoride and aluminum by analyzing the changes of bone metabolism in mice. Methods Kunming mice were randomly divided into nine groups according to the factorial experiment, design of two factors and three levels. The animals in different groups were fed with various doses of fluoride(NaF, 0,50,150 mg/L) and/or aluminum(AlCl3, 0,200,600 mg/L) in drinking water for 24 weeks. Serum calcium, phosphor, magnesium, alkaline phosphatase, osteoealine, parathyroid, and urinary calcium and phosphor were tested. Results We found interaetians of fluoride and aluminum with serum calcium, osteoealine and urine calcium(F=17.370,4.399,9.448, P<0.01), but not with serum phosphor, magnesium, alkaline phosphatase, parathyroid or urinary phospbor(F=0.416,0.415,1.921,1.362, 1.630, P 0.05). The serum levels of calcium and osteoealine in high fluoride group were (1.13±0.27)mmol/L and (6.56±5.74)μg/L, respectively, which were lower than in the control group[ (1.82±0.37)mmol/L and (23.45±15.40)laeJL, respectively], but the levels were elevated to (1.76±0.36)mmol/L and (10.57±4.28)μg/L when high fluoride was combined with low aluminum, and further elevated to (2.10±0.51)mmol/L and (15.73±3.15)μg/L when high fluoride was combined with high aluminum. The urinary calcium level in low fluoride group [ (6.24±2.61)retool/retool Cr] was higher than that in the control group[ (3.12±2.04)retool/retool Cr], but it was decreased in low fluoride and aluminum groups[ (0.81±0.44), (1.23± 0.41)mmol/mmoi Cr, respectively]. On the other hand, the levels of serum ealeium and osteocaline in high aluminum group were (1.07±0.68)mmol/L and (7.21±5.22)μg/L, elevated to (1.47±0.18)mmol/L and (10.98±4.35) μg/L when low fluoride was combined wth high aluminum, and further elevated to (2.10±0.51)mmol/L and (15.73± 3.15)μg/L when high fluoride was.combined with high aluminum, respectively, and the combined effects showed the same trend of higher aluminum. Conclusions Aluminum antagonized fluoride-induced effects, whereas fluoride aggravated the effects caused by aluminum in this experimental conditions. The biomarkers of bone formation and mineralization were suppressed in the combined groups, so the combined effects could interfere with the course of bone turnover by inhabiting bone formation and mineralization, leading to the disorder of bone metabolism eventually.

Objective To investigate the combined effects of fluoride and aluminum intoxication on bones and their possible mechanisms.Methods Kunming mice were divided into nine groups according to the factorial experiment design.Different dose of fluoride(NaF,0,50,150 mg/L)and/or aluminum(AlCl3,0,200,600 mg/L)was administered to each group in drinking water.After 24 weeks,the degree of mottled teeth and the histomorphometric parameters,such as the bone trabecula and osteoid areas,the number of osteoblasts and osteoclasts,and pathologic changes in femur were observed.Results Aluminum could also caused mottled teeth(in degree 4).The mottled teeth in the combined groups were more serious than those in fluoride or aluminum alone group.The interaction between fluoride and aluminum existed in the changes of bone trabecula and osteoid areas(F=2.963,3.688,P＜0.05),and not existed in changes of the number of osteoblasts and osteoclasts(F=2.347,0.888,P＞0.05).In high fluoride group,the trabecula and osteoid areas were(50 675.47±22 916.34),(10 733.97 ±3015.55)μm2,but it increased to(75 988.64±13 797.21),(16 402.88±4605.83)μm2 when combined with high aluminum(P＜0.05),and the group of high fluoride +low aluminum increased to(69 277.16±19 837.51),(18 564.79±6362.47)μm2 (P＜0.05),so aluminum antagonized the effects induced by fluoride;the area of bone trabecula of group of high aluminum was(60 718.43 ±17 574.37)μm2,but it increased[(75 988.64±13 797.21),(82 474.94±15 466.66)μm2]when combined with high or low fluoride(P＜0.05),and the combined effects showed a similarity to those in high aluminum group.The prominent osteoporosis with increased osteoid and cartilage tissues,and decreased amount of bony matrix and minerals were the main histopathological changes in the bone.Conclusions Both high aluminum and fluoride intoxication can result in mottled teeth,their combined effects are more serious than the individual effect.The prominent injury of combined fluoride and aluminum intoxication is osteomalacia and osteoporosis.

The role of autophagy is known to be highly complex and context-dependent, and may be characterized as both tumor suppression and tumor promotion in some tumors, such as breast cancer and prostate cancer. This review outlines recent advances in the studies of the involvement of autophagy in the development, progression and treatment of prostate cancer, focusing on autophagy modulation during androgen deprivation, with a special discussion on the regulatory effect of androgens on the autophagy of prostate cancer cells. A critical evaluation and analysis of the studies suggests that autophagy inhibition combined with androgen deprivation therapy is a promising approach to the treatment of prostate cancer.
Autophagy ; Humans ; Male ; Prostatic Neoplasms

To explore the role and application of Meta-regression and subgroup analyses to recognize and control the heterogeneity in Meta-analysis, Meta-regression models were established by secondary data to screen the factors resulting heterogeneity,and subgroup analyses were used to compare the change of heterogeneity before and after.The heterogeneity was found in the Meta-analysis(Q=44.71,df=27,P=0.017).Sample size and region were selected(P=0.012 and P=0.091,respectively)by Meta-regression from many possible factors such as sample size,year,region and case/contml ratio.The Q values were lowered from 44.71 to 32.11 after subgroup analyses.Thus,Metaregression method was convenient and reliable to screen the affected factors of heterogeneity,and subgroup analyses based on the hypothesis that could significantly lower the heterogeneity.It was recommended to a combined use when an obvious heterogeneity existed but was in need to get an overall result in Metaanalysis.We could correctly judge and lower the heterogeneity to increase the robustness and rationality of results from Meta-analysis.

In adipose tissues from sreater omentum of patients with type 2 diabetes,the mRNA and protein expressions of human rearranged immunoglobulin?light chain (HSIGVL) 022 were measured by the fluorescent quantitative RT-PCR and immunohistochemistry respectively.The results showed that mRNA and protein levels of HSIGVL022 were up-regulated in patients with type 2 diabetes.The mRNA level of HSIGVL022 was linearly correlated with insulin resistance index,suggesting that this gene may play a role in the pathogenesis of insulin resistance and type 2 diabetes.

Objective To evaluate the quality of the portal images acquired by computed radiography(CR)system and conventional screen-film system,respectively.Methods imaging plates (IP)and X-ray films of a home-devised lead phantom with a leakage of 6.45% were acquired,and modulation transfer function(MTF)curves of the both images were measured using edge method.Portal images of 40 nasopharyngeal cancer patients were acquired by IP and screen-film system respectively.Two doctors with similar experience evaluated the damage degree of petrosa] bone,the receiver operating characteristic(ROC)curve of CR images and general images were drawn according to two doctors evaluation results.Results The identification frequency of CR system and screen-film system were 1.159 and 0.806 Lp/mm respectively.For doctor one,the area under ROC curve of CR images and general images were 0.802 and 0.742 respectively.For doctor two,the area under ROC curve of CR images and general images were 0.751 and 0.600 respectively.The MTF curve and ROC curve of CR are both better than those of screen-film system.Conclusion The image quality of CR portal imaging is much better than that of screen-film system.The utility of CR in linear accelerator for portal imaging is promising in clinic.

Objective　To explore the relationship between morphologic evolution and proliferative activity during hepatocarcinogenesis in rats. Methods　Imaging analysis technique was used to detect the morphologic parameters of cells in hepatic lesions in both Solt-Farber model and diethylnitrosamine (DEN)-induced liver cancer model. Immunohistochemistry was employed to detect proliferating cell nuclear antigen (PCNA) and bromodeoxyuridine (BrdU). Results　The oval cells were identified as irregular small proliferating cells in size of one-eighth of and with a nucleus/cytoplasm ratio of 6 times of the normal hepatocyte by image analysis. The morphometric parameters of basophil hepatocyte in precancerous foci and nodule were similar to those of the liver cancer cell. PCNA and BrdU positive cells were mainly localized within the proliferative foci and hepatocellular carcinoma (HCC) tissues. There was a better consistency between the development of hepatic lesions and cellular proliferative activity. Conclusion　The morphologic evolution is closely related to proliferative activity during hepatocarcinogenesis in rats.

Objective　To study the expressions of oncogenes c-Ha-ras, c-ki-ras, pan-ras and c-myc and point mutation of c-Ha-ras1 during hepatocarcinogenesis in rats. Methods　Immunohistochemistry, in situ hybridization and microdissection of tissue (MDT)-PCR-SSCP were used to detect the oncogene expressions and point mutation of c-Ha-ras1 in both Solt-Farber model and DEN-induced liver cancer model. Results　The overexpression of c-Ha-ras was closely associated with the formation and proliferation of the precancerous basophilic hepatocyte foci, while that of c-myc with the growth of the oval cell foci. The abnormalities of IGF-Ⅱ played an important role in the evolution of precancerous foci/nodules towards hepatocellular carcinoma (HCC). The overexpression of fms was only associated with HCC of some rats. Conclusion　Hepatocarcinogenesis in rats was related with the overexpression of c-Ha-ras, c-myc, IGF-Ⅱand fms and the point mutation of c-Ha-ras1, and overexpression of these oncogenes was associated with morphological evolution.

OBJECTIVETo investigate the effects of alcohol intake on penile structure and function in rats.

METHODSThirty adult male Wistar rats were randomly divided into two groups: control group and alcohol intake group. They were administered with 2 mL of normal saline and 40% alcohol solution respectively through gastric tubes every day. Three months later, the animal model of alcohol intake was evaluated by modified Nayagida's method, and the effects of alcohol on the rats were studied by sexual behavior, the number of apomorphine-induced penile erection, level of testosterone in the sera, and the content of penile smooth muscle.

RESULTSThe scores of animal model of alcohol intake evaluated by Nayagida's method were 0.66 +/- 2.05 in the control group and 9.26 +/- 5.50 in the alcohol intake group (P < 0.05), which indicated that an animal model of alcohol intake was successfully established. Sexual behavior, the number of apomorphine-induced penile erection, testosterone level in the sera, and the content of penile smooth muscle of the alcohol intake group were all statistically different as compared with the control group (P < 0.05).

CONCLUSIONAlcohol intake induces sexual dysfunction in rats, which may be due to the decline of testosterone level in the sera and decline of penile smooth muscle.

Animals ; Ethanol ; adverse effects ; Female ; Male ; Penis ; anatomy & histology ; drug effects ; physiology ; Rats ; Rats, Wistar ; Sexual Behavior, Animal ; Testosterone ; blood