Functional reconstruction of lip defects.

The lip is a crucial structure in the oral and maxillofacial region, serving vital physiological functions such as speech, swallowing, chewing, and expression. Due to the complexity of lip anatomy, function, and the various types of defects, the functional restoration and reconstruction of lip defects remain complex and challenging tasks. In this article, we summarize several methods for functional restoration and reconstruction of lip defects using local flaps that carry the depressor anguli oris muscle, as well as some free flaps.

Composition and function of oral microbiota between gingival squamous cell carcinoma and periodontitis.

Objectives: Previous studies have proved that periodontitis is an independent risk factor of oral squamous cell carcinoma (OSCC) epidemiologically. Along with the important role of microbiota in the cancer process and the specific anatomical position, our study explored the microbial composition and functions in periodontitis and gingival squamous cell carcinoma (GSCC).

Materials And Methods: GSCC patients (n = 10), matched periodontitis patients (n = 15), and healthy individuals (n = 15) were recruited.

MicroRNA-532-3p Suppresses Malignant Behaviors of Tongue Squamous Cell Carcinoma Regulating CCR7.

To provide better therapeutic avenues for treating tongue squamous cell carcinoma (TSCC), a series of experiments about the effects of microRNA (miR)-532-3p on TSCC malignant behaviors were carried out. The result showed that miR-532-3p was down-regulated and C-C chemokine receptor 7 (CCR7) was up-regulated in the tumor tissues compared with those in the paired paratumor tissues. Further, expression of miR-532-3p was detected in four TSCC cell lines, TSCCA, TCA8113, CAL-27, and SCC-25.

Association between polymorphisms in pre-miRNA genes and risk of oral squamous cell cancer in a Chinese population.

Background: MicroRNAs play important roles in the development of human cancers. This case-control study is to evaluate the roles of the polymorphisms in pre-miRNAs on risk of oral cancer in a Chinese population.

Methods: The genotypes of three polymorphisms were determined in 340 patients with oral squamous cell cancer and 340 healthy controls who were frequency matched for age and sex.

Frizzled2 mediates the migration and invasion of human oral squamous cell carcinoma cells through the regulation of the signal transducer and activator of transcription-3 signaling pathway.

Frizzled2 (Fzd2) is a receptor for wingless-type MMTV integration site family members (Wnts), the aberrant overexpression of which has been noted to contribute to cancer metastasis. The present study was performed to characterize the role of Fzd2 in the migration and invasion of oral squamous cell carcinomas (OSCC) in vitro. Using TSCCa cells (a tongue SCC cell line) for loss- or gain-of-function of Fzd2, we found that a forced overexpression of Fzd2 promoted TSCCa cell migration and invasion, decreased the expression of epithelial‑cadherin (E-cadherin, an epithelial marker) and increased that of vimentin, Snail Slug, matrix metalloproteinases (MMPs)-2/-9/-13 and a-disintegrin and metalloproteinase with thrombospondin motifs-5 (ADAMTS5).

The association between miR-499 polymorphism and cancer susceptibility: a meta-analysis.

Background: MicroRNAs are a class of new noncoding RNA that play important roles in the pathogenesis of tumor. Rs3746444 in miR-499 is suggested to be associated with cancer susceptibility. In the present study, we assess the association between miR-499 rs3746444 polymorphism and cancer susceptibility through a meta-analysis.

Transverse cervical vessels as recipient vessels in oral and maxillofacial microsurgical reconstruction after former operations with or without radiotherapy.

Background: The purpose of this study was to investigate the reliability and outcome of using the transverse cervical vessel (TCV) as a recipient vessel for microvascular reconstruction in patients whose vessels in the neck region are unavailable because of previous surgery or radiotherapy.

Methods: Between January 2012 and August 2014, secondary head and neck reconstruction was performed using the TCV as a recipient vessel in eight patients who had undergone previous neck dissection and radiation therapy (n = 5). Five patients had a recurrent carcinoma, one had undergone an operation for scar release and two had been treated surgically for a second primary cancer.

Lack of influence of an XRCC3 gene polymorphism on oral cancer susceptibility: meta-analysis.

Background: To systematically summarize the association between the X-ray repair cross complementing 3 (XRCC3) gene polymorphism and oral cancer susceptibility by meta-analysis.

Materials And Methods: Databases including PubMed, EMbase, CNKI, VIP and WanFang Data were searched to identify case-control studies concerning the association between an XRCC3 gene polymorphism and the risk of oral cancer from the inception to June 2014. Two reviewers independently screened the literature according to the criteria, extracted the data and assessed the quality.

Chemokine receptor 7 promotes tumor migration and invasiveness via the RhoA/ROCK pathway in metastatic squamous cell carcinoma of the head and neck.

Metastatic squamous cell carcinoma of the head and neck (SCCHN) has been shown to express chemokine receptor 7 (CCR7), which can activate signaling pathways to promote invasion and survival of SCCHN cells. We hypothesized that the RhoA/Rho-associated kinase (ROCK) pathway is involved in the CCR7-induced invasion and migration of metastatic SCCHN cells. Thus, using migration, matrigel invasion and scrape wound-healing assays, we elucidated the role of RhoA in mediating CCR7-associated cellular mobility.

Association between polymorphism of TGFA Taq I and cleft lip and/or palate: a meta-analysis.

Background: Cleft lip and palate (CL/P) is one of the most common malformations in humans. Transforming growth factor alpha (TGFA) is a well characterized mammalian growth factor which might contribute to the development of CL/P. This meta-analysis aimed to summarize the association between the TGFA Taq I polymorphisms and CL/P.

C392T polymorphism of the Wnt10a gene in non-syndromic oral cleft in a northeastern Chinese population.

Non-syndromic oral cleft is one of the most common congenital malformations, and more than 40 genes may be involved in its aetiology. Recent studies have shown that the Wnt10a gene may also contribute. We recruited 198 patients with non-syndromic oral clefts, comprising 96 elementary families (restricted to the patients and their parents) and 187 controls, to investigate their associations with the risk of such clefts and their subgroups in a Chinese Han population.

Pituitary tumor-transforming gene 1 (PTTG1) is overexpressed in oral squamous cell carcinoma (OSCC) and promotes migration, invasion and epithelial-mesenchymal transition (EMT) in SCC15 cells.

Pituitary tumor-transforming gene 1 (PTTG1) is an important oncogenic transcription factor implicated in various malignancies, including oral squamous cell carcinoma (OSCC), a common malignancy of head and neck. Although PTTG1 is reportedly overexpressed in OSCC tissues, its role in human OSCC remains elusive. Thus, this study was conducted to explore the correlation between PTTG1 expression and tumorigenesis of OSCC.

Overexpression of Wnt11 promotes chondrogenic differentiation of bone marrow-derived mesenchymal stem cells in synergism with TGF-β.

Bone marrow-derived mesenchymal stem cells (MSCs), the most widely used cell source for cartilage tissue engineering, are multipotent cells which have been shown to differentiate into various mesenchyme-lineage cell types including chondrocytes. However, the molecular mechanisms controlling the chondrogenic differentiation of MSCs remain to be fully elucidated. It has been demonstrated that Wnt signaling involves regulating chondrogenesis and MSC differentiation.

[Perforator vascular anatomy and clinical application of the anteromedial thigh flap for head and neck reconstruction].

Purpose: A clinical study was undertaken to define the vascular anatomy of anteromedial thigh perforator flap (AMT) and evaluate the outcomes of the flap in head and neck reconstruction.

Methods: The sizable perforators of AMT flaps and their origins were prospectively explored in 54 patients. For each patient, we recorded the sizable perforators' location, diameter, source vessel, numbers and anatomical types.

Association between polymorphisms in ERCC2 gene and oral cancer risk: evidence from a meta-analysis.

Background: Excision repair cross-complementing group 2 (ERCC2) plays important roles in the repair of DNA damage and adducts. Single nucleotide polymorphisms (SNPs) of ERCC2 gene are suspected to influence the risks of oral cancer. We performed a meta-analysis to systematically summarize the possible association of ERCC2 rs1799793 and rs13181 polymorphisms with oral cancer risks.

Expression of TMPRSS4 in patients with salivary adenoid cystic carcinoma: correlation with clinicopathological features and prognosis.

Although there is growing evidence supporting the hypothesis that TMPRSS4 is linked with cancer susceptibility, the precise role of TMPRSS4 expression in salivary adenoid cystic carcinoma (SACC) is still unknown. The aim of this study was to examine TMPRSS4 expression in SACC and determine its associations with clinicopathological features and survival. TMPRSS4 expression in 125 SACC tissue and adjacent non-cancerous tissues was analyzed by immunohistochemistry and Western blotting.

[Overexpression of Twist1 promotes tumor invasion in human tongue squamous cell carcinoma cell line Tca8113].

Aim: To construct an eukaryotic expression vector of human Twist1 and investigate the relationship between Twist1 overexpression and tumor invasion in human tongue squamous cell carcinoma cell line Tca8113.

Methods: Total mRNA isolated from Tca8113 cells were reversely transcribed to cDNA. Human Twist1 was amplified using specific PCR primers and then subcloned into the pcDNA3.

[Perforator-based chimeric anterolateral thigh flap for head and neck reconstruction after en bloc resection].

Purpose: To discuss and report the operative techniques for harvesting perforator-based chimeric flap in anterolateral thigh region and the advantages for head and neck reconstruction after en bloc resection.

Methods: A retrospective review was performed of perforator-based chimeric anterolateral thigh (ALT) flap for head and neck reconstruction since December of 2007 to March of 2011. 66 perforator-based chimeric flaps were harvested including a skin paddle and a muscular flap supplied by one mother pedicle-descending branch of lateral circumflex femoral artery(d-LCFA).

Clinical anatomical study and evaluation of the use of the free anteromedial thigh perforator flaps in reconstructions of the head and neck.

The anteromedial thigh (AMT) perforator flap is usually thin, pliable, and nearly hairless, making it particularly suitable to repair defects of the head and neck. We studied the topography and outcomes of AMT perforator flaps in such defects after excision of tumours. We retrospectively reviewed the casenotes of 11 consecutive patients who had had reconstructions of the head and neck with the initial intent of using an AMT perforator flap from January 2010 to July 2011.