Adult ; Agriculture ; Antibody Formation ; Female ; Humans ; Immunity, Cellular ; Male ; Middle Aged ; Occupational Exposure

Objective To investigate the regulation effect of promoter methylation of deathassociated protein kinase (DAPK) on mRNA and protein expression of DAPK in tissue of primary gastric cancer (GC). Methods The cancerous and noncancerous samples from 62 patients with GC were determined by RT-PCR for mRNA expression of DAPK. The DAPK promoter methylation was detected by methylation-specific PCR. The protein expression of DAPK in 34 patients with methylation was determined by Western blot. Results mRNA and protein expre.ssions of DAPK in cancerous tissues were reduced significantly compared to noncancerous tissues (0. 2863d±0. 2027 vs 0. 57364±0. 1968,0. 2616±0. 0913 vs 0. 65294±0. 1808, P＜0.01). Methylation frequency of DAPK in cancerous tissues was higher than that in noncancerous tissues (54.8% vs 17.7%, P＜0.01). Furthermore, DAPK mRNA expression was decreased in methylation group compared to unmethylation group (0.1399±0. 0835 vs 0. 46404±0. 1569, P＜0. 01). Moreover, a significant correlation was demonstrated between the TNM stage and DAPK promoter methylation (P = 0. 04). Conclusion Expression of DAPK is down-regulated in cancerous tissues at mRNA and protein levels. Low expression of DAPK is associated with hypermethylation of the promoter of DAPK gene.

Objective To evaluate the effect of convalescent training on patients after special prosthesis replacement in treatment of giant cell tumors. Methods 20 patients with giant cell tumors were treated with convalescent trainings postoperatively,including trainings of muscle strength,joint movement, balance, noumenal sense and gait and were emphasized for earlier training of active muscle contraction. Results According to Enneking score system of bone and muscle postoperation, the lowest for extremitas superior postoperation score of 5 patiens was 20,the highest was 28, the average was 26.6. 4 patiens score was higher than 24, the good rate was 80.0 %.15 patiens extremitas inferior score was from 14 to 27, the average was 21.5, the good rate was 86.7 %. Conclusion Earlier staged joint functional rehabilitation exercise after special prosthesis replacement in treatment of giant cell tumors could prevent ankylosis,improve adhering of capsule,ligament and other soft tissue,and recover the joint function to maximum.

OBJECTIVETo discuss the clinical effects and superiority of applying external fixation and bone transport to treat osteomyelitis and bone defect of femoral bone.

METHODSFrom August 2008 to December 2013,16 patients with osteomyelitis and bone defect of femoral bone were treated including 11 males and 5 females with an average age of 42 years old ranging from 13 to 62 years old. The average course of disease was 18 months ranging from 2 months to 4.5 years, and the average length of bone defect was 7.8 cm ranging from 4.5 to 15 cm. The bone defect of all cases were treated by external fixation and bone transport, the bone transport began at 1 week after operation, 1 mm per day and 4 times per day.

RESULTSAll patients were followed up for 10 to 36 months (means 22.5 months). One patient did not cooperate with treatment leads to the failure, then took the amputation. The remaining 15 cases of osteomyelitis were under control, including 12 cases of bone transport achieved one stage bone union, 3 cases achieved bone union via bone graft from iliac bone. The bone union time was 5 to 13 months(means 7.9 months). Thirteen patients almost obtained the same length of two lower extremities,2 patients had shortening of 1.5 to 2 cm. The time of moving the external fixation was from 6 to 16 months (means 9.3 months).

CONCLUSIONApplication of external fixation and bone transport is an effective method in treating the osteomyelitis and bone defect that can control the infection, eradicate wounds, and be the equalization of limb length.

Adolescent ; Adult ; Bone Transplantation ; External Fixators ; Female ; Femur ; surgery ; Humans ; Male ; Middle Aged ; Osteomyelitis ; surgery

AIM: To observe the surgical effects of the taumatic lens subluxation and cataract after manual fragmentation and emulsification of nucleus and foldable intraocular lens implantation.
METHODS: A 3. 0mm tunnel limbus incision was operated through the predicted bulbar conjunctiva and sclera on 26 cases ( 26 eyes ) with taumatic lens subluxation ( suspensory ligament rupture range less than 120 ) and cataract (Ⅰ ~ Ⅲ) . And after the manual fragmentation and emulsification of nucleus, foldable intraocular lens was implantated. Intraocular lens loop was imbedded in the middle of the lens zonular ligament breakup to reset the pouch. The surgical complications and postoperative vision changes were observed.
RESULTS:Three month after operation, 22 eyes had a intraocular lens centric position taking up 85% of the whole. Four eyes had a slightly eccentric position ( 1 ~2mm), taking up 15% of the whole. 21 eyes had their visual acuity 0. 5~0. 8, taking up 81% of the whole. Five eyes of visual acuity was 0. 2~0. 8. Within 24h intraocular pressure of 12 eyes (46%) after operation were elevated, and returned to normal after 2~7d. There was no severe complication during operation and postoperation.
CONCLUSION: The manual fragmentation and emulsification of nucleus and foldable intraocular lens implantation of the traumatic lens subluxation and the cataract through the 3. 0mm corneal sclera limbus tunnel incision is a simple and effective surgery.

Various geometric shapes and structures self-assembled of amphiphilic lipids when present in an aqueous environment, as active delivery vehicles, are becoming one of focuses of drug delivery system. Lipid-based cubic liquid crystalline nanoparticles (or Cubosomes) consisting of "honeycombed (cavernous)" structure spontaneously formed when a certain concentration of amphiphilic lipids dispersed in aqueous solution has curved bicontinuous lipid bilayer in three dimensions, separating two congruent networks of water channels. Its unique structure consists of internal double water channels and large interfacial areas, which reveal great flexibility in encapsulation efficiency of various polarities and amount of drugs, and has variegated range of drugs encapsulated. As a drug delivery vehicle, high drug payloads, stabilization of peptides or proteins and simple preparation process are also its advantages. The ability of cubic phase to incorporate and control release of drugs of varying size and polar characteristics, and biodegradability of lipids make it an interesting drug delivery system for various routes of administration, including oral, topical (or mucosal) and intravenous administrations, with extensive application in a multitude of dosage forms. Furthermore, a number of different proteins in cubic phase appear to retain their native conformation and bioactivity, and are protected against chemical and physical inactivation. In this paper, investigations of lipid-based cubic liquid crystalline nanoparticles are reviewed and summarized, with a hope to provide a reference for its in-depth study. At the end, the authors made a development prospect of this novel excellent candidate for active ingredients delivery vehicle.
Drug Carriers ; chemistry ; Drug Delivery Systems ; methods ; Lipids ; administration & dosage ; chemistry ; Liquid Crystals ; chemistry ; Nanoparticles

Objective To investigate the effect of 4-phenylbutyric acid(4-PBA)on the renal pathogenesis of rats with streptozotocin-induced diabetes and its mechanism. Methods Fifty-four male SD rats were randomly divided into three groups:normal control group(NC group,n=18),diabetic nephropathy group(DN group,n=18),diabetic nephropathy plus 4-PBA treatment group(4-PBA group,n=18).At the end of 4,8 and 12 weeks,index of kidney weight/body weight ratio(KI)were measured and calculated.Serum creatinine (Scr),blood urea nitrogen(BUN),urinary MDA levels,urinary SOD activity,and 24 hour urinary protein excretion ram(UAER)were detected by HITACHI automatically.Morphology of kidney wag examined by special staining of periodic acid-schitt (PAS).The p47phox and nitrotyrosine (NT) expression in kidney were determined by real-time fluorescence PCR and Western blotting. Results Compared with the NC group, the DN group rats showed a significant increase of KI(P＜0.05), UAER(mg/24 h) (4.92±0.70 vs 0.26±0.07, 5.29±0.83 vs 0.28±0.08, 5.54±0.81 vs 0.29±0.04,respectively, P＜0.05]for indicated time, mesangial cells proliferation and mesangial matrix expansion at 12 week. However,4-PBA treatment could significantly inhibit the increase of KI (P＜0.05), decrease UAER (mg/24 h) (3.71±0.37, 3.47±0.36, 3.28±0.40, respectively, P＜0.05]for indicated time, and prevent the glomeruler pathological alteration induced by diabetes. Moreover, the mRNA expression of p47phox in the kidney of DN group was 154.72%, 148.60% and 91.95% more than that of NC group (all P＜0.05) for indicated time. The protein expression of p47phox was 118.00%, 140.10% and 177.82% more than that of NC group (all P＜0.05), and the protein expression of NT was 45.29%,59.13% and 89.28% more than that of NC group (all P＜0.05). In addition, urinary MDA levels in DN group were 2.05-, 2.26- and 2.43- folds of NC group, and urinary SOD activities were decreased by 64.78%, 71.29% and 79.32% of NC group. Compared with the DN group, the mRNA and protein expression of p47phox, and protein expression of NT in 4-PBA group were decreased markedly (all P＜0.05) at the end of 8 and 12 weeks. The urinary MDA level was decreased, and the urinary SOD activity was increased significantly in rats with diabetes after 4-PBA treatment for indicated time (all P＜0.05). Conclusion 4-PBA treatment can significantly inhibit the renal pathogenesis of rats with diabetes through inhibition of oxidative stress.

Objective To investigate the effect and significance of regulating endoplasmic reticulum stress on the expression of histone methyltransferases SET7/9 in the kidneys of db/db mice.Methods Db/db mice were randomly divided into two groups according to random number table method:diabetic nephropathy model group (DN group,n=18) and betaine treatment group (DN+B group,n =18),db/m mice were defined as normal control group (NC group,n =18).At the end of 4,8 and 12 weeks,the expression of GRP78,SET7/9,H3K4me2,and monocyte chemoattractant protein 1 (MCP-1) was determined by real-time fluorescence PCR and Western blotting.24-hour urinary protein excretion rate (UPER) and urine MCP-1 were measured by enzyme linked immunosorbent assay (ELISA).The dynamic changes of blood glucose(BG),serum creatinine (Scr),blood urea nitrogen (BUN) were tested by completely automatic biochemistry analyzer.The morphology of kidney was estimated by special staining of periodic acid-schiff (PAS).Results The levels of BG,BUN,UAER and MCP-1 were significantly higher in DN group than those in NC group (P ＜ 0.05),and were in time-dependent manner.Glomerular basement membrane thickening and mesangial cells proliferation began to emerge in DN group at the end of week 4 and mesangial matrix expansion was more obvious at the end of week 12.The mRNA and protein expression of GRP78 and SET7/9 were elevated significantly in DN group as compared to NC group.The H3K4me2 protein expression level was also increased in time-dependent manner.Compared with the DN group,in DN+B group glomerular lesions attenuated and the GRP78 and SET7/9 expression levels obviously decreased (P ＜ 0.05).Furthermore,the levels of BG,BUN,UPER,MCP-1,H3K4me2 in DN+B group were also reduced (P ＜ 0.05).Conclusion Endoplasmic reticulum stress may be the upstream mechanism of mediating the expression of SET7/9 in the kidneys of DN mice.

Objective To investigate the effects of MG132 on diabetic nephropathy (DN) rats induced with streptozocin. Methods Seventy-two male SD rats were randomly divided into three groups: normal control group (NC, n=24), DN group (n=24) and DN treated with MG132 group (DN+MG132, n=24). At the end of 4, 8 and 12 weeks, 24 hour urinary protein excretion rate (UPER) was detected. Morphology of kidney was examined by special staining of periodic acid-schiff (PAS). Renal 26S proteasome activity was determined by quantifying the hydrolysis of S-LLVY-AMC in a fluorescence reader. Urinary malondialdehyde (MDA) level and renal SOD and GSH-PX activity were detected by commercial kits. Renal SOD, GSH-PX and p47phox mRNA expressions were determined by real-time fluorescence PCR. Renal p47phox protein expression wasdetermined by Western blotting. Results Compared with NC group, the DN group showed a significant increased of UPER at week 4, 8, 12 (all P<0.05), of mesangium proliferation and mesangial matrix expansion at week 12. In DN+MG132 group, UPER was significantly decreased compared with DN group at the end of 4, 8 and 12 weeks (P<0.05, respectively), and the glomeruler pathological alteration induced by diabetes was attenuated. Increased renal 26S proteasome activity in DN rats was significantly inhibited after MC132 administration (P<0.05). Moreover, renal p47phox mRNA expression in DN group was 155%, 149% and 120% more than those in NC group at 3 time points (all P<0.05), and so was the renal p47phox protein expression, 139%, 152% and 186% more (all P<0.05). Urinary MDA levels in DN group were 1.95-, 2.04-and 2.62-folds more than those in NC group (all P<0.05). In addition, compared with NC group at 3 time points, in DN group, renal SOD activity was decreased by 23.09%, 33.59% and 53.31% (all P<0.05); renal GSH-PX activity was decreased by 28.57%, 33.06% and 48.76% (all P< 0.05); renal SOD mRNA was decreased by 38.09%, 61.44% and 76.53% (all P<0.05); renal GSH-PX mRNA group was decreased by 29.16%, 37.26% and 62.40% (all P<0.05). Compared with DN group, renal p47phox mRNA and protein expression, and urinary MDA levels were significantly lower in DN+MG132 group (all P<0.05); renal SOD and GSH-PX activity as well as mRNA expression were significantly increased in DN+MG132 group (all P<0.05). Conclusions MG132 treatment can provide renoprotection for DN rats effectively maybe through enhancing renal anti-oxidative ability.