Advances in molecular mechanisms of bone invasion by oral cancer / 华西口腔医学杂志

Bone invasion by oral cancer is a common clinical problem, which affects the choice of treatment and predicts a poor prognosis. Unfortunately, the molecular mechanism of this phenomenon has not been fully elucidated. Current studies have revealed that oral cancer cells modulate the formation and function of osteoclasts through the expression of a series of signal molecules. Many signal pathways are involved in this process, of which receptor activator of nuclear factor-κB ligand/receptor activator of nuclear factor-κB/osteoprotegerin signaling pathway attracted much attention. In this review, we introduce recent progress in molecular mechanisms of bone invasion by oral cancer.

Advances on mechanism and treatment of salivary gland in radiation injury / 华西口腔医学杂志

Oral squamous cell carcinoma (OSCC) is the most frequent tumour in head and neck malignant. The current treatment is mainly based on surgery therapy, radiation therapy and chemical therapy. Meanwhile, there are many a defect in the treatment. For example, there are many defects in radiotherapy. Radioactive salivatitis is the most common. In addition, there are a series of changes such as dry mouth, oral mucositis, rampant dental caries, and radioactive osteomyelitis of jaw, which cause swallowing, chewing problems, and taste dysfunction. Currently, the research on radioactive salivatitis is progressing rapidly, but its mechanism is more complication. This paper review aims to summarize the research progress in this field.

Effect of piceatannol against malignant melanoma / 华西口腔医学杂志

OBJECTIVES@#To study the antitumor effect of piceatannol (PIC) on malignant melanoma @*METHODS@#B16F10 cells were cultured @*RESULTS@#The cell viability of B16F10 decreased with increasing PIC concentration. The results of the Transwell assay showed that invasion ability decreased with increasing PIC concentration, and healing time was prolonged at increased PIC concentration in the wound healing assay. Western blot results showed that PIC mainly inhibited the phosphorylation of Syk and inhibited the expression of MMP-2, MMP-9, and VEGF. RNA interference pointed out that blocking the expression of Syk can reveal the same inhibition effect on B16F10 cells as PIC. @*CONCLUSIONS@#PIC might block the progression of malignant melanoma by inhibiting spleen tyrosine kinase.

Peripheral odontogenic keratocysts in buccal soft tissues: two cases report / 华西口腔医学杂志

Peripheral odontogenic keratocysts are rarely observed, and cases of odontogenic keratocysts of buccal soft tissues are even rarer. This study was performed to present two rare cases of odontogenic keratocysts in buccal soft tissues and review related literature.

Application of platelet-rich fibrin on mandibular third molar extraction: systematic review and Meta-analysis / 华西口腔医学杂志

OBJECTIVES@#This study aims to analyze the effectiveness of platelet-rich fibrin (PRF) in mandibular third molar extraction and provide suggestions for alleviating postoperative complications.@*METHODS@#Pubmed, EMBASE, Web of Science, and SinoMed were searched electronically on February 2020. Randomized controlled trials focusing on PRF usage in mandibular third molar extraction were included. Reviewers assessed the risk of bias in the included literature and extracted data independently using the criteria recommended by the Cochrane Collaboration. Meta-analysis was performed using RevMan 5.3 and STATA 13.0.@*RESULTS@#Twenty-one studies were included, comprising 991 patients who had mandibular third molar extraction. The topical application of PRF effectively reduced pain after extraction [MD=-12.06, 95%CI (-21.42, -2.71), @*CONCLUSIONS@#Limited clinical evidence indicates that applying PRF after mandibular third molar extraction could reduce pain, swelling, trismus and the occurrence of dry socket and promote soft tissue healing. However, the effect of PRF on bone healing requires further large-scale randomized controlled trials and unified measurement criteria.

Application of mixed reality in oromaxillofacial head and neck oncology surgery: a preliminary study / 华西口腔医学杂志

Mixed reality (MR), characterized by the ability to integrate digital data into human real feeling, is a new technique in medical imaging and surgical navigation. MR has tremendous value in surgery, but its application in oromaxillofacial head and neck oncology surgery is not yet reported. This paper reports the application of MR in oromaxillofacial head and neck oncology surgery. The merits, demerits, and present research situations and prospects of MR are further discussed.

Research progress on the modification of guided bone regeneration membranes / 华西口腔医学杂志

Guided bone regeneration (GBR) is an important technique to solve bone defect problems. In this technique, GBR barrier membranes play an irreplaceable role. GBR membranes can act as a barrier protecting fibroblasts from bone defects and promote osteoblast adhesion and proliferation, leading to bone regeneration. GBR barrier membranes should be enhanced because of the disadvantages of collagen membranes, which are extensively applied to the field of GBR. Therefore, various efforts have been devoted to modifying the antibacterial and osteogenic properties of GBR barrier membranes and developing novel materials. This article reviews the research advancements on the modification of GBR barrier membranes and discover future directions for the development of GBR barrier membranes to provide a reference for bone tissue engi-neering and repair.

The wound healing potential of collagen peptides derived from the jellyfish Rhopilema esculentum / 中华创伤杂志(英文版)

PURPOSE@#Wound represents a major health challenge as they consume a large amount of healthcare resources to improve patient's quality of life. Many scientific studies have been conducted in search of ideal biomaterials with wound-healing activity for clinical use and collagen has been proven to be a suitable candidate biomaterial. This study intended to investigate the wound healing activity of collagen peptides derived from jellyfish following oral administration.@*METHODS@#In this study, collagen was extracted from the jellyfish--Rhopilema esculentum using 1% pepsin. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and fourier transform infrared (FTIR) were used to identify and determine the molecular weight of the jellyfish collagen. Collagenase II, papain and alkaline proteinase were used to breakdown jellyfish collagen into collagen peptides. Wound scratch assay (in vitro) was done to determine migration potential of human umbilical vein endothelial cells (HUVEC) covering the artificial wound created on the cell monolayer following treatment with collagen peptides. In vivo studies were conducted to determine the effects of collagen peptides on wound healing by examining wound contraction, re-epithelialization, tissue regeneration and collagen deposition on the wounded skin of mice. Confidence level (p < 0.05) was considered significant using GraphPad Prism software.@*RESULTS@#The yield of collagen was 4.31%. The SDS-PAGE and FTIR showed that extracted collagen from jellyfish was type I. Enzymatic hydrolysis of this collagen using collagenase II produced collagen peptides (CP) and hydrolysis with alkaline proteinase/papain resulted into collagen peptides (CP). Tricine SDS-PAGE revealed that collagen peptides consisted of protein fragments with molecular weight <25 kDa. Wound scratch assay showed that there were significant effects on the scratch closure on cells treated with collagen peptides at a concentration of 6.25 μg/mL for 48 h as compared to the vehicle treated cells. Overall treatment with collagen peptide on mice with full thickness excised wounds had a positive result in wound contraction as compared with the control. Histological assessment of peptides treated mice models showed remarkable sign of re-epithelialization, tissue regeneration and increased collagen deposition. Immunohistochemistry of the skin sections showed a significant increase in β-fibroblast growth factor (β-FGF) and the transforming growth factor-β (TGF-β) expression on collagen peptides treated group.@*CONCLUSION@#Collagen peptides derived from the jellyfish-Rhopilema esculentum can accelerate the wound healing process thus could be a therapeutic potential product that may be beneficial in wound clinics in the future.

Clavicle fracture after radical neck dissection of mouth floor carcinoma misdiagnosed as cervical metastasis: a case report / 华西口腔医学杂志

Clavicle fracture, a very rare delayed complication following radical neck dissection of oral carcinoma, is normally ignored by oral and maxillofacial surgeons. We report and analyze a male patient with clavicle fracture after primary extended excision and bilateral radical neck dissection. This case was misdiagnosed as cervical metastasis.

Contrast-enhanced CT for the diagnosis of mandibular invasion caused by oral cancers: a systematic review / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To assess the diagnostic efficacy of contrast-enhanced CT in diagnosing mandibular invasion of oral cancers.</p><p><b>METHODS</b>PubMed, Excerpta Medica Database (EMBASE), the European Grey Literature Database, Chinese Biomedical Literature Database (CBM), and CQVIP were searched electronically on January 03, 2014. Hand-searching was also performed on 19 relevant Chinese journals. The methodological quality assessment, as suggested in Cochrane Handbook, and the data extraction of the studies included were performed by two reviewers in duplicate. Meta-analysis was conducted using the Meta Disc 1.4 software.</p><p><b>RESULTS</b>Fourteen studies that involved 642 participants were included. Among the seven prospective studies, one had a low bias risk and the rest had unclear bias risks. When mandibular invasion was diagnosed the Meta-analysis results showed that the pooled sensitivity (SEN) was 0.718 [95% confidence interval (CI), 0.665-0.767], the pooled specificity (SPE) was 0.909 (95% CI, 0.872-0.938), the area under curve (AUC) was 0.906 1, and the Q* was 0.837 8. When mandibular medullary invasion was diagnosed, the SEN was 0.787 (0.643-0.893), the SPE was 0.904 (0.790-0.968), the AUC was 0.949 6, and the Q* was 0.890 0. The Meta-regression results showed that the smaller slide thickness had a higher diagnosis efficacy.</p><p><b>CONCLUSION</b>CT showed a high efficacy in diagnosing mandibular or medullary invasion caused by oral cancers. With a high SPE, contrast-enhanced CT can confirm the clinical diagnosis of bone invasion effectively. In addition, selecting a smaller slide thickness CT can increase diagnosis efficacy.</p>

Effect of Chinese medicine comprehensive regimen as the maintenance therapy on time to progression and quality of life of patients with advanced non-small-cell lung cancer / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of Chinese medicine (CM) comprehensive regimen as the maintenance therapy (MT) on time to progression (TTP) and quality of life (QOL) of patients with advanced non-small-cell lung cancer (NSCLC).</p><p><b>METHODS</b>The study was a prospective, randomized and controlled clinical trial. Fifty non-progressive patients with advanced NSCLC who responded to first-line therapy were randomized into the test group (25 cases, treated with CM comprehensive regimen: intravenous dripping of Chinese herbal preparation, oral administration of Chinese herbal decoction, and point application) and the control group [25 cases, treated with one of three single-agent maintenance chemotherapy regimens: pemetrexed (500 mg/m2, day 1), docetaxel (75 mg/m2, day 1), and gemcitabine (1000 mg/mi, day 1 and day 8) in the ratio of 1:1]. Each cycle consisted of 21 days. Cycles were repeated until the disease progressed, or intolerable toxic or adverse reaction occurred, or patients refused to continue the treatment. The primary end point was TTP and the secondary end point was QOL. QOL was evaluated using the European Organization for Research and Treatment of Cancer quality-of-life questionnaire QLQ-LC43 (EORTC QLQ-LC43). TTP of fifty patients and QOL of 43 patients had been statistically analyzed.</p><p><b>RESULTS</b>(1) The TTP in the test group was prolonged for 23 days when compared with that of the control group, with insignificant difference (87 days vs 64 days, P=0.063). (2) The scores of domains in EORTC QLQ-LC43 were statistically significantly better in the test group than in the control group (P<0.05) except cognitive and social functions, the symptoms of dysphagia and pain in other parts.</p><p><b>CONCLUSIONS</b>(1) The CM comprehensive regimen as MT had equivalent efficacy on TTP when compared with single-agent maintenance chemotherapy regimen. It was advantageous over improving the QOL. (2) It is necessary to enlarge the sample size to further confirm the therapeutic efficacy of CM comprehensive regimen as MT in treatment of patients with advanced NSCLC.</p>

Preferred reporting items for systematic reviews and meta-analysis for reporting quality of Chinese meta-analysis on stomatology / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To determine the current status and influence factors of reporting quality of the Chinese meta-analysis on stomatology.</p><p><b>METHODS</b>A comprehensive electronic search was carried out through Chinese BioMedical Literature Database (CBM), VIP Database for Chinese Technical Periodicals (VIP) and China National Knowledge Infrastructure (CNKI) and a hand searching was also performed through 19 stomatological journals in Chinese to identify meta-analysis on stomatology. Two reviewers took responsibility for study inclusion, data extraction and reporting quality assessment with preferred reporting items for systematic reviews and meta-analysis (PRISMA) in duplicate and any disagreement was resolved by discussion.</p><p><b>RESULTS</b>A total of 34 meta-analysis on stomatology were eligible, most of them were on oral medicine and oral and maxillofacial surgery, and mainly focusing on etiology, prevention and treatment of oral diseases. The number of the meta-analysis increased during recent years. Reporting quality of the meta-analysis was not high and the PRISMA scored (13.6 ± 4.2). The main factors that influenced the reporting quality of meta-analysis were published on evidence-based medicine journals (adjusted β = 0.53, t = 4.15, P < 0.001) and year of publication (adjusted β = -0.44, t = -3.28, P = 0.001). The sensitivity analysis showed that this outcome was stable.</p><p><b>CONCLUSIONS</b>Reporting quality of the Chinese meta-analysis on stomatology is low. To provide sufficient evidence to the clinicians and promote the development of evidence-based dentistry in China, experts on stomatology should study the knowledge of evidence-based medicine and comply with PRISMA statement when producing the meta-analysis.</p>

Association between plasma adiponectin level and in-stent restenosis after coronary stenting / 中华心血管病杂志

<p><b>OBJECTIVE</b>The purpose of the present study was to identify the relationship between the plasma level of adiponectin and in-stent restenosis of patients with coronary heart disease after coronary stenting.</p><p><b>METHOD</b>The study population comprised 119 individuals (92 men) who underwent stent implantation, including 65 subjects without in-stent restenosis (group A) and 54 patients with in-stent restenosis (group B). The level of plasma adiponectin was measured using ELISA. Coronary angiography was performed immediately before and after implanting stent and 9 - 12 months later.</p><p><b>RESULTS</b>Baseline characteristics including drug use after PCI were similar between the groups. The rate of implanting bare metal stent is 8 (12.31%) and 6 (11.11%), TAXUS drug-eluting stent is 11 (16.92%) and 10 (18.52%) and CYPHER drug-eluting stent is 46 (70.77%) and 38 (70.37%) respectively (all P > 0.05). Plasma level of adiponectin in patient of group A was significantly higher than that in group B [(15.16 +/- 5.02) mg/L vs. (10.01 +/- 4.93) mg/L, P < 0.05]. The quantitative coronary angiography (QCA) showed that lesion length was similar between groups [(15.82 +/- 6.67) mm vs. (13.40 +/- 4.20) mm, P > 0.05], minimum lumen diameter (MLD) and stenosis rate were also similar before and after implanting stent (P > 0.05) and acute gain was (1.48 +/- 0.65) mm vs. (1.19 +/- 0.37) mm (P > 0.05). MLD was higher in group A than that in group B [(2.55 +/- 0.53) mm vs. (0.57 +/- 0.60) mm, P < 0.01] at 9 - 12 months follow up. Restenosis rate [(24.2 +/- 11.2)% vs.(81.0 +/- 19.1)%, P < 0.01] and late lumen loss [(0.50 +/- 0.34) mm vs. (1.60 +/- 0.54) mm, P < 0.01] were lower in group A than in group B.</p><p><b>CONCLUSIONS</b>The lower plasma adiponectin level might be associated with in-stent restenosis after coronary stenting.</p>

Regulatory effect of jianpi wenshen recipe in combining with chemotherapy on the blood level of estradiol in patients with lung cancer / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the regulatory effect of Jianpi Wenshen Recipe (JPWS), a Chinese herbal preparation for strengthening Pi and warming Shen, combined with chemotherapy on the level of estradiol (E2) in patients with mid-late non-small cell lung cancer (NSCLC), and to analyse the relationship between the changes of estradiol and tumor size.</p><p><b>METHODS</b>Fifty-one NSCLC patients were randomized into three groups: 16 cases in the JPWS group treated with JPWS alone, 18 cases in the test group treated with combined therapy of JPWS plus chemotherapy, and 17 cases in the chemotherapy group treated with chemotherapy alone, all were treated for 2 months. The changes of blood E2 level and tumor size before and after treatment were compared.</p><p><b>RESULTS</b>The disease control rate in the JPWS group and combined therapy group was 53.85% (7/13) and 80.00% (8/10), respectively, both were higher than that in the chemotherapy group (44.40%, 4/9), but the difference showed statistical insignificance (P > 0.05). E2 level was significantly lowered after treatment in the former two groups (all P < 0.05), and the change was in accordance with that of tumor size in 26 out of 31 patients (P < 0.01).</p><p><b>CONCLUSION</b>JPWS combined with chemthherapy can stabilize the tumor size and down-regulate E2 levelo, with the change of E2 correlated with that of tumor size in patients. Hence, decreasing E2 is one of the mechanisms for JPWS in treating lung cancer.</p>

Clinical effect of yiqi yangyin jiedu decoction in treating patients with advanced non-small cell lung cancer / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the clinical therapeutic effect and mechanism of Yiqi Yangyin Jiedu Decoction (YYJD, a Chinese herbal recipe for strengthening qi, nourishing yin and removing toxic substance, consisting of milkvetch root 30 g, glehnia root 30 g, asparagus root 15 g, lilyturf root 15 g, grossy privet fruit 12 g, spikemoss herb 30 g, Chinese sage herb 30 g, manyleaf paris rhizome 30 g, etc. ) in treating patients with advanced nonsmall cell lung cancer (NSCLC).</p><p><b>METHODS</b>Sixty patients with advanced lung cancer of qi-yin deficiency syndrome were randomized into three groups: the TCM group (A) treated with YYJD, the chemotherapy group (B) treated by chemotherapy with NP or GP protocol, and the combined treated group (C) treated with YYJD and chemotherapy in combination. The efficacy was evaluated after two cycles of treatment.</p><p><b>RESULTS</b>The total effective rate for alleviating qi-yin deficiency syndrome in group A was 80%, significantly higher than that in Group C and B (35% and 20%, P <0.01) respectively. The KPS increasing and stabilizing rate in Group A and C was 90% and 85% respectively, significantly higher than that in Group B (75%), and difference between A and B was significant (P <0.05). In Group C after treatment, CD(3)+ showed a rising trend (P = 0.05), different to that in Group A and B (P <0.05 and P <0.01); CD(4)+ significantly increased (P <0.05) and CD(4)+/CD(8)+ ratio showed increasing trend (P = 0.06), while in Group B both were decreased significantly, showed significantly difference (P < 0.05). CD(8)+ CD(28)+ significantly increased after treatment in Group A and C (P <0.01 and P <0.05), but showed decreasing trend (P = 0.06) in Group B, significant difference was shown between B and C (P <0.05).</p><p><b>CONCLUSION</b>YYJD can ameliorate the qi-yin deficiency syndrome evidently in advance lung cancer patients; improve their quality of life, the mechanism might be by way of enhancing T-lymphocyte activity and killer T-cell function, to elevate the T-cell mediated immunity in a round way.</p>