Diagnostic strategies for diseases with fever in dental clinics / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Fever is an increase in body temperature beyond the normal range, acting as a protective inflammatory mechanism. This article summarizes diseases with fever encountered in dental clinics, including what is known about pyrexia in coronavirus infection, and further proposes a "six steps in one" identification and analysis strategy to guide the clinical work of stomatology.

A comprehensive profile of TCF1+ progenitor and TCF1- terminally exhausted PD-1+CD8+ T cells in head and neck squamous cell carcinoma: implications for prognosis and immunotherapy / 国际口腔科学杂志·英文版

The heterogeneity of exhausted T cells (Tex) is a critical determinant of immune checkpoint blockade therapy efficacy. However, few studies have explored exhausted T cell subpopulations in human cancers. In the present study, we examined samples from two cohorts of 175 patients with head and neck squamous cell cancer (HNSCC) by multiplex immunohistochemistry (mIHC) to investigate two subsets of Tex, CD8+PD1+TCF1+ progenitor exhausted T cells (TCF1+Texprog) and CD8+PD1+TCF1- terminally exhausted T cells (TCF1-Texterm). Moreover, fresh tumor samples from 34 patients with HNSCC were examined by flow cytometry and immunohistochemistry to further investigate their properties and cytotoxic capabilities and their correlation with regulatory T cells (Tregs) in the tumor immune microenvironment (TIME). mIHC and flow cytometry analysis showed that TCF1-Texterm represented a greater proportion of CD8+PD1+Tex than TCF1+Texprog in most patients. TCF1+Texprog produced abundant TNFα, while TCF1-Texterm expressed higher levels of CD103, TIM-3, CTLA-4, and TIGIT. TCF1-Texterm exhibited a polyfunctional TNFα+GZMB+IFNγ+ phenotype; and were associated with better overall survival and recurrence-free survival. The results also indicated that larger proportions of TCF1-Texterm were accompanied by an increase in the proportion of Tregs. Therefore, it was concluded that TCF1-Texterm was the major CD8+PD1+Tex subset in the HNSCC TIME and that these cells favor patient survival. A high proportion of TCF1-Texterm was associated with greater Treg abundance.

Difficult and complicated oral ulceration: an expert consensus guideline for diagnosis / 国际口腔科学杂志·英文版

The complexity of oral ulcerations poses considerable diagnostic and therapeutic challenges to oral specialists. The expert consensus was conducted to summarize the diagnostic work-up for difficult and complicated oral ulcers, based on factors such as detailed clinical medical history inquiry, histopathological examination, and ulceration-related systemic diseases screening. Not only it can provide a standardized procedure of oral ulceration, but also it can improve the diagnostic efficiency, in order to avoid misdiagnosis and missed diagnosis.

Diabetes fuels periodontal lesions via GLUT1-driven macrophage inflammaging / 国际口腔科学杂志·英文版

Hyperglycemia induces chronic low-grade inflammation (inflammaging), which is a newly identified contributor to diabetes-related tissue lesions, including the inflammatory bone loss in periodontitis. It is also a secondary senescent pattern mediated by an increased burden of senescent cells and senescence-associated secretory phenotype (SASP). Macrophage is a key SASP-spreading cell and may contribute to the maintenance of SASP response in the periodontal microenvironment. Using a transgenic diabetic model (BLKS/J-Lepr

FGF8 induces epithelial-mesenchymal transition and promotes metastasis in oral squamous cell carcinoma / 国际口腔科学杂志·英文版

Oral squamous cell carcinoma (OSCC) is one of the most common cancers worldwide, and with 354 864 new cases each year. Cancer metastasis, recurrence, and drug resistance are the main causes to cripples and deaths of OSCC patients. As potent growth factors, fibroblast growth factors (FGFs) are frequently susceptible to being hijacked by cancer cells. In this study, we show that FGF8 is upregulated in OSCC tissues and high FGF8 expression is related with a set of clinicopathologic parameters, including age, drinking, and survival time. FGF8 treatment enhances the invasive capability of OSCC cells. Lentivirus-based FGF8 expression promotes OSCC metastasis in a mouse lung metastasis model. Further, mechanistic study demonstrates that FGF8 induces epithelial-mesenchymal transition (EMT) in OSCC cells. These results highlight a pro-metastatic function of FGF8, and underscore the role of FGF8 in OSCC development.

SOX2-dependent expression of dihydroorotate dehydrogenase regulates oral squamous cell carcinoma cell proliferation / 国际口腔科学杂志·英文版

Oral squamous cell carcinoma (OSCC) become a heavy burden of public health, with approximately 300 000 newly diagnosed cases and 145 000 deaths worldwide per year. Nucleotide metabolism fuel DNA replication and RNA synthesis, which is indispensable for cell proliferation. But how tumor cells orchestrate nucleotide metabolic enzymes to support their rapid growth is largely unknown. Here we show that expression of pyrimidine metabolic enzyme dihydroorotate dehydrogenase (DHODH) is upregulated in OSCC tissues, compared to non-cancerous adjacent tissues. Enhanced expression of DHODH is correlated with a shortened patient survival time. Inhibition of DHODH by either shRNA or selective inhibitors impairs proliferation of OSCC cells and growth of tumor xenograft. Further, loss of functional DHODH imped de novo pyrimidine synthesis, and disrupt mitochondrial respiration probably through destabilizing the MICOS complex. Mechanistic study shows that transcriptional factor SOX2 plays an important role in the upregulation of DHODH in OSCC. Our findings add to the knowledge of how cancer cells co-opt nucleotide metabolism to support their rapid growth, and thereby highlight DHODH as a potential prognostic and therapeutic target for OSCC treatment.

Diagnostic strategies for oral manifestations of infectious diseases / 浙江大学学报·医学版

Infectious diseases are caused by infection of organism with pathogenic agents, which may lead to epidemics. Many infectious diseases such as syphilis, diphtheria, measles, and acquired immunodeficiency syndrome have specific and non-specific manifestations in the oral cavity. However, the same disease may have different oral manifestations in different patients clinically. We can apply the strategy of "three unusuals and one change" in clinical reasoning for diagnosis of infectious diseases with oral manifestations. The so-called "three unusuals" refer to unusual age, unusual location and unusual effect, and "one change" means the change from rare to common. In this article, we will give a comprehensive introduction about the oral manifestations of common communicable diseases and their diagnostic strategies.

Clinical diagnosis of oral erosive and ulcerative diseases in children / 浙江大学学报·医学版

Mucosal disease is one of the most common oral cavity diseases in children, among which mucosal erosion and ulceration account for about 50%. Oral mucosal erosion and ulcer diseases in children are mostly acute with obvious pain, affecting speech, eating and swallowing. Some oral mucosal diseases are caused by infection and would result in epidemic among children. The onset age, sites, lesions size and quantity could vary, and some would have recurrence. The detailed medical history and comprehensive physical examination are necessary, some diseases can be diagnosed according to the medical history and clinical manifestations. If diagnosis can not be made, biopsy, blood test and immunofluorescence staining, immunohistochemistry, molecular biology detection, gene diagnosis, tuberculin test and other tests should be considered, and further investigation of systemic diseases should also be carried out if necessary. In some cases, multidisciplinary consultation should be sought. For those who still have no abnormal findings, therapeutic diagnosis can be tried out or secondary biopsy should be performed. In this article, the research progress of oral mucosal diseases in children is reviewed and our own clinical experiences of oral erosive and ulcerative diseases in children are summarized.

Application of medical magnifying loupes in diagnosis of oral mucosal diseases / 浙江大学学报·医学版

: To evaluate the application of medical magnifying loupes in diagnosis of oral mucosal diseases. Twenty-four patients with plaque-type oral lichen planus or homogeneous oral leukoplakia were inspected by naked eyes or assistance with magnifying loupes. Histopathological results were used as the gold standard to evaluate the sensitivity, specificity and accuracy of the two methods in clinical diagnosis. Questionnaires were used to evaluate the subjective effect of magnifying loupes on the diagnosis efficiency of oral mucosal diseases and to explore the most suitable parameters for application. The sensitivity, specificity and accuracy of medical magnifying loupes for the identification of plaque-type oral lichen planus and homogeneous oral leukoplakia were 94.74%, 100.00% and 95.83%, respectively, which were significantly higher than those of naked eye inspection (89.47%, 80.00% and 87.50%). The effective rate of magnifying loupes assisted diagnosis was 91.76% according to physicians' subjective evaluation. The most suitable parameters were 3.5 times magnification and working distance. The medical magnifying loupes can effectively improve the efficiency of the inspection and diagnosis of oral mucosal diseases, and have the characteristics of convenience and real-time. The recommended clinical parameters are 3.5 times magnification and working distance.

Immune mechanisms involved in the coexistence of oral lichen planus and autoimmune thyroid diseases / 浙江大学学报·医学版

Oral lichen planus (OLP) is a chronic inflammatory oral mucosal disease with unclear etiology. Autoimmune thyroid diseases (AITD) is a type of autoimmune disease characterized by increased thyroid-specific antibodies. In recent years, more and more studies have found that the incidence of AITD is increased in OLP patients. The occurrence and development of OLP and AITD may be related to the expression of thyroid autoantigen in oral keratinocytes, the imbalance of thyroid hormone （Th）1/Th2 and Th17/Treg cell subsets, the abnormal quantity and function of follicular helper T cells and chemokines and the specific killing ability of CD8 T cells to target cells. In this article, the possible immune mechanisms involved in the coexistence of OLP and AITD are reviewed to provide insights for the diagnosis, treatment and prevention of these two diseases from the perspective of immunology.

Management strategy of oral mucosal diseases during the epidemic of Corona Virus Disease 2019 / 口腔疾病防治

Corona Virus Disease 2019 (COVID-19) has broke out in 29 countries and regions in the world in a short period since December 2019. Various measures of prevention and control have been taken all over China. At present, the epidemic situation shows a positive trend, however, there are still a few new comfirmed cases in some area of China. So the job and thinking of epidemic prevention still cannot be relaxed. As an important specialty of stomatology, the risk of cross infection is high in oral medicine. Establishing an effective system of pre- inspection and triage and adopting strict measures of prevention and control are essential. According to the prevention and control situation of COVID- 19, the characteristics of hospital infection, pre examination, protective measures, the home management strategies of oral mucosal diseases during the epidemic period and the differential diagnosis between COVID-19 and common oral muco- sal diseases with fever were summarized and recommended in this paper.

High expression of ACE2 receptor of 2019-nCoV on the epithelial cells of oral mucosa / 国际口腔科学杂志·英文版

It has been reported that ACE2 is the main host cell receptor of 2019-nCoV and plays a crucial role in the entry of virus into the cell to cause the final infection. To investigate the potential route of 2019-nCov infection on the mucosa of oral cavity, bulk RNA-seq profiles from two public databases including The Cancer Genome Atlas (TCGA) and Functional Annotation of The Mammalian Genome Cap Analysis of Gene Expression (FANTOM5 CAGE) dataset were collected. RNA-seq profiling data of 13 organ types with para-carcinoma normal tissues from TCGA and 14 organ types with normal tissues from FANTOM5 CAGE were analyzed in order to explore and validate the expression of ACE2 on the mucosa of oral cavity. Further, single-cell transcriptomes from an independent data generated in-house were used to identify and confirm the ACE2-expressing cell composition and proportion in oral cavity. The results demonstrated that the ACE2 expressed on the mucosa of oral cavity. Interestingly, this receptor was highly enriched in epithelial cells of tongue. Preliminarily, those findings have explained the basic mechanism that the oral cavity is a potentially high risk for 2019-nCoV infectious susceptibility and provided a piece of evidence for the future prevention strategy in dental clinical practice as well as daily life.

Salivary protease spectrum biomarkers of oral cancer / 国际口腔科学杂志·英文版

Proteases are important molecules that are involved in many physiological and pathological processes of the human body, such as growth, apoptosis and metastasis cancer cells. They are potential targets in cancer diagnosis and biotherapy. In this study, we analyzed the salivary protease spectrum of patients with oral squamous cell carcinoma (OSCC), oral benign masses and chronic periodontitis, as well as that of health, using human protease array kits, enzyme-linked immunosorbent assay, western blot and immunofluorescence. The salivary protease spectrum was found to be associated with oral diseases. For example, the saliva of patients with OSCC contained increased numbers of proteases than those of other oral diseases and health. The levels of matrix metalloproteinase (MMP)-1, MMP-2, MMP-10, MMP-12, A disintegrin and metalloprotease (ADAM)9, A disintegrin and metalloprotease with thrombospondin type 13 motifs (ADAMST13), cathepsin V and kallikrein 5 in the saliva of patients with OSCC were significantly increased compared with those of other groups. Taking MMP-1, cathepsin V, kallikrein 5 and ADAM9 as biomarkers of OSCC, cutoff values were199, 11.34, 9.29 and 202.55 pg·mL, respectively. From the area under the curve, sensitivity and specificity, the combination of cathepsin V/kallikrein5/ADAM9 was an optimal biomarker for diagnosing OSCC. Thus, analysis of the salivary protease spectrum may be an innovative and cost-efficient approach to evaluating the health status of the oral cavity. Specifically, increases in cathepsin V, kallikrein 5 and ADAM9 may be useful biomarkers in the screening and diagnosis of OSCC.

Dental-craniofacial manifestation and treatment of rare diseases / 国际口腔科学杂志·英文版

Rare diseases are usually genetic, chronic and incurable disorders with a relatively low incidence. Developments in the diagnosis and management of rare diseases have been relatively slow due to a lack of sufficient profit motivation and market to attract research by companies. However, due to the attention of government and society as well as economic development, rare diseases have been gradually become an increasing concern. As several dental-craniofacial manifestations are associated with rare diseases, we summarize them in this study to help dentists and oral maxillofacial surgeons provide an early diagnosis and subsequent management for patients with these rare diseases.

Photodynamic therapy guidelines for the management of oral leucoplakia / 国际口腔科学杂志·英文版

With recent developments in photosensitizers and light delivery systems, topical 5-aminolevulinic acid-mediated photodynamic therapy (ALA-PDT) has become the fourth alternative therapeutic approach in the management of oral leucoplakia (OLK) due to its minimally invasive nature, efficacy, and low risk of systemic side effects and disfigurement. This report presents step-by-step guidelines for applying topical ALA-PDT in the management of OLK based on both the clinical experience of the authors and a systematic review of the current literature. Studies using protocols with standardized parameters and randomized clinical trials at multiple centres with adequate sample sizes and both interim and long-term follow-ups are needed before universally applicable guidelines can be produced in this field.

The cytokine network involved in the host immune response to periodontitis / 国际口腔科学杂志·英文版

Periodontitis is an inflammatory disease involving the destruction of both soft and hard tissue in the periodontal region. Although dysbiosis of the local microbial community initiates local inflammation, over-activation of the host immune response directly activates osteoclastic activity and alveolar bone loss. Many studies have reported on the cytokine network involved in periodontitis and its crucial and pleiotropic effect on the recruitment of specific immunocytes, control of pathobionts and induction or suppression of osteoclastic activity. Nonetheless, particularities in the stimulation of pathogens in the oral cavity that lead to the specific and complex periodontal cytokine network are far from clarified. Thus, in this review, we begin with an up-to-date aetiological hypothesis of periodontal disease and summarize the roles of cytokines in the host immune response. In addition, we also summarize the latest cytokine-related therapeutic measures for periodontal disease.

Analyze the national directory of rare diseases, define the diagnostic role of the stomatologists / 中华口腔医学杂志

A rare disease, also referred to as an orphan disease, is defined as the disease with a low prevalence or that affects a small percentage of the population. It is a well model of human disease, which can facilitate the in-depth study and understanding of related diseases. Therefore, five Chinese governmental authorities, including the National Health Commission of the People′s Republic of China, jointly issued the "First National Directory of Rare Diseases" (the First List) on May 11, 2018. The First List covers 121 rare indications. In the analysis of the directory, we found that among the 121 diseases, there are 51 (42.2%) with oral characterization. Oral manifestations mainly include craniofacial abnormalities, dentition (dental) abnormalities, oral soft tissue lesions, jaw bone lesions, salivary gland related diseases, etc., even some of them are the first, earliest and inevitable clinical manifestations of some patients with rare diseases. In order to strengthen the understanding of stomatological counterparts on the importance of the national directory of rare diseases and deeply understand the important and irreplaceable role of stomatologists in the diagnosis and treatment of rare diseases, the present review article is specifically written to introduce the oral characterization of the rare diseases listed in the catalogue, aiming at improving the diagnosis and treatment capabilities of these diseases by peers and benefiting the public.

The state-of-the-art development in research on oral mucositis induced by chemotherapy / 中华口腔医学杂志

Chemotherapy is one of the effective methods to treat cancer. However, the chemotherapy agents may cause a series of adverse reactions due to the nonselective characteristics that affect not only tumor cells, but also normal cells. Oral mucositis induced by chemotherapy is a common oral complication caused by chemotherapy in clinic. It brings great suffering to the patients and also interferes with the procedure of chemotherapy. Because of its high incidence in patients receiving chemotherapy and the significant influence, there are more researches on oral mucositis induced by chemotherapy which let us have further understanding of it. This review article will introduce the pathogenesis, risk factors, clinical manifestations, assessments, treatment and prevention of oral mucositis induced by chemotherapy.

Application and prospect of three-dimentional printing in stomatology / 中华口腔医学杂志

Three dimentional printing is a new rapid prototyping technology based on digital model files, which developed through a combination of multi-disciplines such as information technology, precision machinery and materials science. With rapid development in recent years, three dimentional printing technology has been widely used in the medical fields, stomatology especially. It gradually penetrates into various parts of stomatology, such as education, practice and innovation, making stomatology clinical medicine more and more efficient, accurate and minimally invasive. Combined with basic research and clinical cases, this article describes the application and developent prospects of three dimentional printing technology in stomatology.

Holistic integrative medicine: application in prevention and treatment of oral mucosal diseases / 中华口腔医学杂志

Holistic integrative medicine (HIM), as one of the important ideas in the field of medicine, arouses great concern recently. HIM regards the human body as a whole, turns data and evidence in medical research back to facts, integrates technologies and experience developed in clinical research into medical skills. The repeated practices at the levels of fact, experience, and medical skills will generate true knowledge to solve the wide spread problems brought by linearized thinking and fragmented knowledge. With the development of highly divided medical disciplines, how to utilize and practice HIM has become a common concern of the medical community. Specialization of stomatology, which is a first level discipline like medicine, has also become a trend for years. However, holistic concept cannot be overlooked, especially in the development of oral medicine. This article aims at the communication and exchange of knowledge about HIM among dental professionals. In order to serve the patients better, the authors look forward to practicing the HIM concept in the field of oral medicine through the efforts of us all.