Changes of Temporomandibular Joint Morphology and Symptoms in Class II Malocclusion Patients With Bilateral Sagittal Split Ramous Osteotomy.

This study included 46 patients with class II malocclusion ranging in age from 19 to 39 years old treated with bilateral sagittal split ramous osteotomy (BSSRO). Left and right temporomandibular joints (TMJs) of each subject were evaluated independently with cone-beam computed tomography (CBCT) before operation (T1), 1 week after operation (T2), and 1 year after operation (T3) and assessed the effects of orthognathic surgery (OGS) on the temporomandibular joint disease (TMD) symptoms. Temporomandibular joint morphology evaluation included condylar volume, condylar area, cortical bone thickness, depth of the mandibular fossa, fossa thickness, joint nodule angle, joint space, and condyle-fossa relationship, which were calculated by using the Mimics software and 3-matic software. Data were statistically analyzed with SPSS software (P <0.05 means statistically significant). In our study, bilateral TMJs have no difference in T3. Bilateral sagittal split ramous osteotomy had no significant effect on the articular fossa. The condyle volume and surface area decreased from T1 to T3, but the cortical thickness of the bone did not change significantly. More anterior condyle positions in T1 and more posterior in T3.21 patients had at least 1 sign or symptom of TMD in T1 and 27 patients in T3. Four patients who were asymptomatic in T1 developed pain after surgery, 10 developed noises, 12 showed limited mouth opening, and 8 had abnormal opening patterns. It is concluded that more condylar posterior position after BSSRO and the reduction of condyle may be related to the enlargement of anterior space. The number of patients with joint symptoms increased postoperative, and the impact of BSSRO on TMD may be negative.

A Modified Procedure for Anterior Maxillary Osteotomy.

ABSTRACT: Anterior maxillary osteotomy is a traditional operation in the treatment of maxillary protrusion. Varies fields about operation have been changed or improved in those years to avoid different kinds of complications. In our study, the authors would present 1 kind of improved anterior maxillary osteotomy surgical method. The study was conducted at the Department of Oral and Maxillofacial Surgery, Guanghua School of Stomatology, Hospital of Stomatology, Guangzhou, Guangdong province. Patients are divided into improved group and general group. Patients after surgery were claimed to have regular return visits. Occlusion, tooth vitalities, postoperative complications would be well evaluated. The operative time, blood losses, complications showed no different at maxillary operation. Our procedure could give much better and direct sight of anterior maxillary bone, and the simplified osteotomy lines could help maxilla move, reduce the times spent on hard tissue cut off or grind. The modified procedure can meet clinical command, improve dentofacial deformities, and gives convenience to surgeon.

Characterization and prebiotic potential of polysaccharides from Rosa roxburghii Tratt pomace by ultrasound-assisted extraction.

In this study, polysaccharides (RRTPs) were extracted from Rosa roxburghii Tratt pomace by hot water or ultrasound (US)-assisted extraction. The structural properties and potential prebiotic functions of RRTPs were investigated. Structural characterization was conducted through HPAEC, HPGPC, GC-MS, FT-IR and SEM. Chemical composition analysis revealed that RRTPs extracted by hot water (RRTP-HW) or US with shorter (RRTP-US-S) or longer duration (RRTP-US-L) all consisted of galacturonic acid, galactose, glucose, arabinose, rhamnose and glucuronic acid in various molar ratio. US extraction caused notable reduction in molecular weight of RRTPs but no significant changes in primary structures. Fecal fermentation showed RRTPs could reshape microbial composition toward a healthier balance, leading to a higher production of beneficial metabolites including total short-chain fatty acids, curcumin, noopept, spermidine, 3-feruloylquinic acid and citrulline. More beneficial shifts in bacterial population were observed in RRTP-HW group, while RRTP-US-S had stronger ability to stimulate bacterial short-chain fatty acids production. Additionally, metabolic profiles with the intervention of RRTP-HW, RRTP-US-S or RRTP-US-L were significantly different from each other. The results suggested RRTPs had potential prebiotic effects which could be modified by power US via molecular weight degradation.

A survey on pupae parasitoid species of Dendrolimushoui (Lajonquiere) (Lepidoptera, Lasiocampidae) in China.

Cryptomeriajaponicavar.sinensis Miquel in south China is currently overwhelmingly infested by a native caterpillar species, Dendrolimushoui (Lepidoptera), which is causing severe economic losses and ecological disasters in both planted and natural forests. Our results include report of five parasitoid species and eight parasitoid flies within D.houi and a dominant endoparasitoid species Kriechbaumerelladendrolimi, which attacks pupae of D.houi with a high parasitism rate. This result might be helpful to improve better identification and application in the future for potential biological control of D.houi in the forests of east Asia.

The Combination of Chrysin and Cisplatin Induces Apoptosis in HepG2 through Down-regulation of cFLIP and Activity of Caspase.

AIM: The study aims to investigate the combined effects of chrysin and cisplatin on hepatoma(HepG2) cell lines in vivo and in vitro. OBJECTIVE: Studies have suggested that chrysin can enhance the sensitivity of tumor cells to apoptosis. Drug resistance in tumor cells reduced the effectiveness of chemotherapy drugs such as cisplatin. We investigated whether the combination of chrysin and cisplatin can induce more apoptosis than chrysin alone and cisplatin alone. METHODS: HepG2 cells were pretreated with chrysin for 2 h, followed by the addition of cisplatin for another 24 h. The morphologic changes were observed under inverted microscope and the cell viability was measured using the MTT test. The protein and cleavage of caspase-3,8,9, PARP, and cFLIP were determined by Western blotting. RESULTS: The cell viability of the HepG2 cell can be reduced by the combination of chrysin pretreatment for 2 h and cisplatin addition for 24 h; Caspase-3,8,9 and PARP were cleaved after 12 h treatment with chrysin and cisplatin; Pancaspase inhibitor, Z-VAD-fmk, could reverse the apoptosis induced by chrysin and cisplatin in HepG2 cells; cFLIP was down-regulated by the combination of chrysin and cisplatin, and could be reversed by Z-VAD-fmk; the xenografted HepG2 cells formed a tumor in one week; At the end of the experiment, there were significant differences in relative tumor volume (RTV) and relative tumor proliferation rate between the combined group and the control group, the chrysin group and the cisplatin group; Western blotting showed that the levels of PARP, cFLIP, and caspase-3 proteins in isolated tumor tissues also decreased under the combined action of chrysin and cisplatin. CONCLUSION: The combination of chrysin and cisplatin induces apoptosis of hepatic tumor in vivo and in vitro. It downregulates cFLIP and then activates caspase-8, which triggers caspase-mediated apoptosis of HepG2 cell.

A Novel tiRNA-Gly-GCC-1 Promotes Progression of Urothelial Bladder Carcinoma and Directly Targets TLR4.

BACKGROUND: Patients with urothelial bladder carcinoma (UBC) have a poor prognosis and a high risk of progression. Recently, tRNA-derived small RNAs (tsRNAs), a novel type of noncoding RNA, have been identified. In our previous study, we found tiRNA-Gly-GCC-1 was significantly upregulated in UBC tissue and might target the predicted target gene toll-like receptor 4 (TLR4) to play a regulatory role in UBC. Thus, the aim of this study was to identify the functional roles of tiRNA-Gly-GCC-1 and the relationship between tiRNA-Gly-GCC-1 and TLR4. METHODS: After lentiviral transfection in 5637 and T24 cell lines, quantitative reverse transcription-PCR, Cell Counting Kit-8, IncuCyte ZOOM™ live cell imaging, flow cytometry, Transwell assays, scratch assay, and luciferase assay were performed. RESULTS: The results showed down-regulation of tiRNA-Gly-GCC-1 inhibits cell proliferation, migration and invasion, promotes cell apoptosis, and affects the cell cycle. Besides, tiRNA-Gly-GCC-1 was found to inhibit TLR4 expression by directly targeting its 3'UTR. CONCLUSIONS: Our study demonstrated that tiRNA-Gly-GCC-1 promotes the progression of UBC and directly targets TLR4. This study provides novel insights for future investigations to explore the mechanisms and therapeutic targets for UBC.

Differential Expression Profiles and Bioinformatics Analysis of tRNA-Derived Small RNAs in Muscle-Invasive Bladder Cancer in a Chinese Population.

Muscle-invasive bladder cancer (MIBC) leads to a large societal burden. Recently, tRNA-derived small RNAs (tsRNAs), a novel type of noncoding RNA (ncRNAs), have been identified. However, the expression patterns and functions of tsRNAs in MIBC have not yet been identified. Here, RNA sequencing, bioinformatics, and quantitative reverse transcription- polymerase chain reaction (qRT-PCR) were used to screen the expression profiles and predict the potential roles of tsRNAs in MIBC. Of 406 tsRNAs differentially expressed in MIBC tissues, 91 tsRNAs were significantly differentially expressed. Then, four candidate tsRNAs, tiRNA-1:34-Val-CAC-2, tiRNA-1:33-Gly-GCC-1, tRF-1:32-Gly-GCC-1, and tRF-+1:T20-Ser-TGA-1, were selected. Next, a bioinformatics analysis showed the potential target genes and tsRNA-mRNA network. The most significant and meaningful terms of gene ontology were the positive regulation of the phosphate metabolic process, lamellipodium, and protein-cysteine S-acyltransferase activity in the biological process, cellular component, and molecular function, respectively. In addition, the top four pathways were predicted by the Kyoto Encyclopedia of Genes and Genomes database (KEGG). Finally, qRT-PCR demonstrated a similar expression pattern compared to sequencing data for the candidate tsRNAs. In short, we find differential expression profiles and predict that tiRNA-1:33-Gly-GCC-1, tRF-1:32-Gly-GCC-1, and tRF-+1:T20-Ser-TGA-1 are very likely to engage in the pathophysiological process of MIBC via regulating the target genes in the key pathways.

Differentiation of Isolated Small Bowel Crohn's Disease from Other Small Bowel Ulcerative Diseases: Clinical Features and Double-Balloon Enteroscopy Characteristics.

Background: The diagnosis of isolated small bowel Crohn's disease (ISBCD) has always been challenging. Aims: This study is aimed at comparing the clinical features and double-balloon enteroscopy (DBE) characteristics of ISBCD with those of other small bowel ulcerative diseases (OSBUD). Methods: Patients with coexisting colonic and/or ileal valve lesions (n = 45) or whose final diagnosis was not determined (n = 29) were excluded. One hundred thirty-nine patients with ISBCD and 62 patients with OSBUD found by DBE were retrospectively analyzed. Results: The age of ISBCD onset was lower than that of OSBUD (OR 0.957, 95% CI 0.938-0.977, p < 0.001). Abdominal pain was more common in ISBCD (OR 4.986, 95% CI 2.539-9.792, p < 0.001). Elevated fibrinogen levels (OR 1.431, 95% CI 1.022-2.003, p = 0.037) and lower levels of D-dimer (OR 0.999, 95% CI 0.999-1.000, p = 0.017) were also more supportive of the diagnosis of ISBCD. Nonsteroidal anti-inflammatory drugs (NSAIDs) used for more than two weeks decreased the probability of a diagnosis of ISBCD (OR 0.173, 95% CI 0.043-0.695, p = 0.013). Abdominal computed tomography revealed a higher proportion of skip lesions in ISBCD than in OSBUD (OR 9.728, 95% CI 3.676-25.742, p < 0.001). The ulcers of ISBCD were more distributed in the ileum (111 (79.9%) vs. 29 (46.8%), p < 0.001), and their main morphology differed in different intestinal segments. Longitudinal ulcers (OR 14.293, 95% CI 4.920-41.518, p < 0.001) and large ulcer (OR 0.128, 95% CI 0.044-0.374, p < 0.001) contributed to the differentiation of ISBCD from OSBUD. We constructed a diagnostic model, ISBCD index (AUROC = 0.877, 95% CI: 0.830-0.925), using multifactorial binary logistic regression to help distinguish between these two groups of diseases. Conclusion: Clinical features, laboratory tests, abdominal computed tomography, DBE characteristics, and pathology help to distinguish ISBCD from OSBUD.