Objective · To investigate the histone methyltransferase capability of DOT1L-long form and its role in breast cancer metastasis.Methods · The existence of DOT1L-long form was confirmed by PCR, and the mRNA level of DOT1L was tested by real-time PCR. In HEK293T cells in which DOT1L canonical and DOT1L-long were overexpressed respectively, Western blotting was used to test the expression level of DOT1L and the histone methyltransferase capability. In the MCF10A cell line with inducible expression of DOT1L-long, real-time PCR was used to detect the mRNA level of epithelial-mesenchymal transition (EMT) marker, and transwell assay was used to detect the migration of breast cancer cells in which the expression level of DOT1L is low or high. Results · PCR demonstrated the existence of DOT1L-long form, and real-time PCR showed it widely exists in HCT116, T98G, MCF10A cells, etc. Western blotting showed the expression of DOT1L-long form and its H3K79 methyltransferase activity. In MCF10A cells in which overexpressed canonical DOT1L and DOT1L-long, mRNA levels of N-cadherin and fibronectine increased. Transwell showed canonical DOT1L and DOT1L-long both substantially increased the migration of breast cancer cells. Conclusion · The existence of DOT1L-long was confirmed and investigated, which is 202 amino acids longer than the canonical DOT1L, and is coded by a new exon, located between exon 27 and 28. Further, the DOT1L-long has H3K79 methyltransferase activity, and is able to promote breast cancer metastasis.

OBJECTIVETo study the combination of Mandibular distraction and orthognathic techniques for the reconstruction of adult hemifacial microsomia.

METHODSThe three-dimensional CT reconstruction data was used with Mimics for preoperation design. The osteotomy location, distraction vector, distraction distance were decided before operation with a surgical guider. At the first stage, internal distractor was implanted after ostetomy through an extra-oral approach. The distraction begun 5-7 days after operation with a frequency of 1 mm/day. After distraction, the distractor was maintained for 3-6 months. At the second stage, the distractor was removed. Le Fort I osteotomy was performed in order to correct the cross-bite and improve the facial contour. Usually, bone graft was inserted into the gap after Le Fort I osteotomy. The genioplasty was also performed if necessary.

RESULTS9 cases of adult hemifacial microsomia with severe mandibular deviation were treated. The facial asymmetry were improved greatly. 1 patient suffered an wound infection in the maxillary region after Le Fort I osteotomy and healed uneventfully with wound irrigation.

CONCLUSIONSMandibular distraction combined with orthognathic surgery is an effective procedure for adult hemifacial microsomia with complicated mandibular hypoplasia.

Adult ; Aged ; Bone Transplantation ; Facial Asymmetry ; surgery ; Goldenhar Syndrome ; surgery ; Humans ; Mandible ; surgery ; Osteogenesis, Distraction ; methods ; Osteotomy, Le Fort ; methods

0.05), but the level of albumin dropped significantly(P

Antibiotics, Antineoplastic ; pharmacology ; Breast Neoplasms ; enzymology ; pathology ; Cell Line, Tumor ; Doxorubicin ; pharmacology ; Drug Resistance, Multiple ; drug effects ; Drug Resistance, Neoplasm ; drug effects ; Female ; Glucosyltransferases ; biosynthesis ; genetics ; Humans ; Oligodeoxyribonucleotides, Antisense ; genetics ; RNA, Messenger ; biosynthesis ; genetics ; Transfection

Objective To study the effect of platelet-derived growth factor(PDGF)and lysosomes on lung injury in macaque with early-phase endotoxie shock.Method Eleven macaques were randomly divided into two groups,namely,control group(Co group,n=5)iand endotoxic group(En group,n=6).The macaque of the Co group injected with 1 ml/kg normal saline and the macque of the En group received a dose of 2.8 mg/kg Lipopolysaccharides(LPS)i.v.The blood gas was detected at 120 minutes after LPS challenging. Uhrastructure,cytochemistry of acid phosphatase(ACPase)detection by electronic microscopy and immunohistochemical assay of PDGF were completed in hmgs of all the macaque .Results Administration of LPS did not change the parameters of gas exchange,namely,PaO_2,PaO_2/Fi and PaCO_2.In the early phase,of endotoxic shock,ACPase activity products increased and lysosome destroyed in the alveolar cells.The pathologic changes of alveolus,such as degeneration of vessel endothelium,injury of alveolar epithelium and damage of basement membrane,and transudation of blood component were observed by electron microscopy in the En group. However,no pathological changes were found in the control group.By immunohistochemical staining,PDGF on alveolar wall in the En animals was observed,whereas no PDGF protein in the Co macaques was noticed. Conclusions Administration of LPS induced the expression of PDGF in the alveolar wall and lysosome injury in the alveolar cells,as a result of alveolar damage in early-phase endotoxin shock.In the meantime,the parameters of gas exchanges did not change.The PDGF may play an important role in the pathogenesis of lung during the early-phase of endotoxin shock.

OBJECTIVETo investigate the effects of Gastric bypass surgery on the apoptosis of islet β-cells in type 2 nonobese diabetic (NOD) rats and its mechanisms.

METHODSSeventy-two 8-week-old GK rats were randomly divided into four groups:operation group (group O, n = 18), sham operation group (group S, n = 18), diet control group (group F, n = 18) and control group (group C, n = 18). The levels of fasting, postprandial blood glucose, insulin and glucagon-like peptide-1 (GLP-1) were measured and compared among the 4 groups before the operation and at 1, 2, 4 and 8 weeks following the operation. The blood samples were collected at 2, 4 and 8 weeks after the operation for the measurement of postprandial blood glucose, and then the rats in batches (6 rats in each group) were decapitated to retrieve the pancreas. The apoptosis of the islet β-cells was detected by using TUNEL assay, and the expression of apoptosis-related proteins Bcl-2, Bax was measured with immunohistochemistry.

RESULTSAs for group O, the fasting blood glucose level decreased from (16.2 ± 0.8) mmol/L before the operation to respectively (9.2 ± 0.6) mmol/L and (9.7 ± 0.7) mmol/L at 4 and 8 weeks after the operation; postprandial blood glucose decreased from (31.1 ± 1.1) mmol/L before the operation to respectively (13.1 ± 0.7) mmol/L and (12.3 ± 0.7) mmol/L at 4 and 8 weeks after the operation. Fasting insulin level increased from (28.0 ± 1.2) mU/L before the operation to respectively (62.8 ± 1.9) mU/L and (61.7 ± 1.4) mU/L at 4 and 8 weeks after the operation; and at 4 and 8 weeks after the operation postprandial insulin level was (77.4 ± 1.1) mU/L and (77.1 ± 1.0) mU/L. At 2 weeks from the operation, the fasting GLP-1 in group O increased from (10.7 ± 1.0) pmol/L to (13.5 ± 0.8) pmol/L, and respectively to (26.1 ± 0.9) pmol/L and (25.3 ± 1.2) pmol/L at 4 and 8 weeks after the operation. The differences in the above-mentioned items before and after the operation were all significant in group O (P < 0.05), and the differences in the items among group O and the other three groups (P < 0.05) were all significant as well. In group O, the apoptosis rate of pancreatic islet cell decreased to (5.9 ± 0.7)% at 4 weeks from the operation, and (6.3 ± 1.1)% at 8 weeks from the operation (P < 0.05). The expression of Bcl-2 protein in group O was 31.3 ± 1.5, 35.7 ± 1.0 and 35.8 ± 0.8 at 2, 4 and 8 weeks post operation, which was significantly higher in statistics than those of the same time point in the other three groups (P < 0.05). The expression of Bax protein in group O was 13.3 ± 0.9, 10.8 ± 0.9 and 10.9 ± 1.1 at 2, 4 and 8 weeks from the operation, which was significantly lower in statistics than those of the same time point in the other three groups (P < 0.05).

CONCLUSIONSGastric bypass surgery can significantly reduce the blood glucose level and promote the secretion of GLP-1, and therefore inhibit the apoptosis of the islet β cells in diabetic rats through the Bcl-2 pathway.

Animals ; Apoptosis ; Blood Glucose ; Diabetes Mellitus, Type 2 ; pathology ; surgery ; Disease Models, Animal ; Gastric Bypass ; Glucagon-Like Peptide 1 ; blood ; Insulin ; blood ; Islets of Langerhans ; pathology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; bcl-2-Associated X Protein ; metabolism

Illegally paid blood donation was a risk factor for HIV acquisition exclusively in Henan and Hubei Provinces of China, and not in Shanghai. Nucleotide sequences in the gag and env genes of HIV-1 were compared between isolates from Henan and Shanghai regions of China to test whether an expected higher degree of a common source of infections from this unique blood donation transmission risk would be evident as decreased variation among Henan isolates in an exploratory cross-sectional analysis. Among 38 isolates studied, 23 of 23 (100%) from Henan and 8 of 15 (54%) from Shanghai were subtype B. In addition, fewer sequence differences were found in gp41 of subtype B isolates from Henan than from Shanghai isolates. Further studies with additional controls are therefore warranted to confirm the role of the degree of a common source of infections in differences in HIV variation across populations.

Objective To evaluate the multimodal treatment outcomes and patterns of treatment failure in esthesioneuroblastoma at a single institution. Methods One hundred and twelve patients who were newly diagnosed with esthesioneuroblastoma but no distant metastasis in our institution from 1979 to 2014 were retrospectively analyzed. The treatment modes, outcomes, and patterns of treatment failure in these patients were analyzed. According to the modified Kadish staging system, the numbers of patients with stage A, B, C, and D esthesioneuroblastoma were 1, 23, 60, and 28, respectively. Fifty?one patients received surgery and postoperative radiotherapy with or without chemotherapy;forty?six patients received radiotherapy with or without chemotherapy;eleven patients received preoperative radiotherapy and surgery with or without chemotherapy;three patients received surgery with or without chemotherapy; one patient received chemotherapy alone. The survival rates were calculated using the Kaplan?Meier method. Results In all patients, the 5?year sample size was 44, and the 5?year overall survival ( OS ) and disease?free survival ( DFS) rates were 66?4% and 54?7%, respectively. The 5?year OS and DFS rates were 91% and 82% in patients who received preoperative radiotherapy and surgery with or without chemotherapy, 80% and 66% in patients who received surgery and postoperative radiotherapy with or without chemotherapy, and 46% and 37% in patients who received radiotherapy with or without chemotherapy. Three patients treated with surgery alone had relapse of the disease;one patient treated with palliative chemotherapy survived 6 months. Treatment failed in 47 ( 42%) out of 112 patients. In patients with failed treatment, 53% had distant metastasis as the first pattern of treatment failure, 36% had locoregional relapse, and 11% had concurrent distant metastasis and locoregional relapse. Conclusions Surgery combined with radiotherapy is still the recommended multimodal treatment regimen for esthesioneuroblastoma. The multimodal treatment achieves satisfactory local?regional control rate and treatment outcomes in the treatment of esthesioneuroblastoma. The major pattern of treatment failure is distant metastasis.

This prospective study was conducted to assess the rate of resolution of second trimester placenta previa in women with anterior placenta and posterior placenta,and that in women with and without previous cesarean section.In this study,placenta previa was defined as a placenta lying within 20 mm of the internal cervical os or overlapping it.We recruited 183 women diagnosed with previa between 20+0 weeks and 25+6 weeks.They were grouped according to their placenta location (anterior or posterior) and history of cesarean section.Comparative analysis was performed on demographic data,resolution rate of previa and pregnancy outcomes between anterior group and posterior group,and on those between cesarean section group and non-cesarean section group.Women with an anterior placenta tended to be advanced in parity (P=0.040) and have increased number of dilatation and curettage (P=0.044).The women in cesarean section group were significantly older (P=0.000) and had more parity (P=0.000),gravidity (P=0.000),and dilatation and curettage (P=0.048) than in non-cesarean section group.Resolution ofprevia at delivery occurred in 87.43％ women in this study.Women with a posterior placenta had a higher rate of resolution (P=0.030),while history of cesarean section made no difference.Gestational age at resolution was earlier in posterior group (P=0.002) and non-cesarean section group (P=0.008) than in anterior group and cesarean section group correspondingly.Placenta location and prior cesarean section did not influence obstetric outcomes and neonatal outcomes.This study indicates that it is more likely to have subsequent resolution of the previa when the placenta is posteriorly located for women who are diagnosed with placenta previa in the second trimester.