Objective: To analyze the trends, gender, and age differences in the incidence of lip and oral cavity cancer in Chinese population from 1990 to 2021 and predict future incidence trends, providing a scientific basis for disease prevention and public health policy. Methods: Incidence data of lip and oral cavity cancer in Chinese population from the Global Burden of Disease (GBD) database from 1990 to 2021 were analyzed. The Joinpoint regression model was used to assess temporal trends, the age-period-cohort model was used to evaluate the independent effects of age, period, and cohort, and the Bayesian age-period-cohort model (BAPC) model was used to predict incidence trends from 2022 to 2044. Results: From 1990 to 2021, the age-standardized incidence rate of lip and oral cavity cancer in Chinese population increased from 2.39/100 000 to 3.76/100 000, and the crude incidence rate rose from 1.71/100 000 to 4.85/100 000. The incidence rate in males was higher and increased more rapidly than in females. Higher incidence rates were prevalent among older populations, a rapid increase in incidence rates occurred during 2003 to 2012, and earlier birth cohorts showed overall higher risks. BAPC predictions indicated a continued rise in incidence from 2022 to 2044. During this period, male incidence stabilized while female incidence increased at a relatively faster rate. Conclusion The incidence of lip and oral cavity cancer in Chinese population has revealed a continuous upward trend, particularly among males and older populations. Future prevention strategies should focus on these high-risk populations.

Objective To elucidate the role of let-7 in the pathogenesis of oral squamous cell carcinoma(OSCC)and its underlying molecular mechanism.Methods The expression of let-7 in human oral keratinocyte(HOK),OSCC tissues,and OSCC cells(CAL-27,SCC-25,and SCC-9)was detected by quantitative real-time PCR.Colony formation,scratch,Transwell,and flow cytometry assays were used to examine the effects of let-7 on the proliferation,migration,invasion,and apoptosis of SCC-25 cells.Western blotting was used to detect the expression of Wnt and β-catenin proteins.The correlation between let-7 expression and the clinicopathological cha-racteristics and prognosis of OSCC patients was analyzed.Results let-7 was downregulated in OSCC tissues and cells.let-7 over-expression effectively inhibited the proliferation,migration,and invasion of SCC-25 cells while promoting apoptosis by suppressing acti-vation of the Wnt/β-catenin pathway.let-7 expression was closely associated with tumor stage,lymph node metastasis,and patient survival status.Patients with low let-7 expression exhibited lower overall survival rate.Conclusion let-7 targets and regulates the Wnt/β-catenin pathway,thereby inhibiting proliferation,migration,and invasion of OSCC cells while promoting apoptosis.

Objective To elucidate the role of let-7 in the pathogenesis of oral squamous cell carcinoma(OSCC)and its underlying molecular mechanism.Methods The expression of let-7 in human oral keratinocyte(HOK),OSCC tissues,and OSCC cells(CAL-27,SCC-25,and SCC-9)was detected by quantitative real-time PCR.Colony formation,scratch,Transwell,and flow cytometry assays were used to examine the effects of let-7 on the proliferation,migration,invasion,and apoptosis of SCC-25 cells.Western blotting was used to detect the expression of Wnt and β-catenin proteins.The correlation between let-7 expression and the clinicopathological cha-racteristics and prognosis of OSCC patients was analyzed.Results let-7 was downregulated in OSCC tissues and cells.let-7 over-expression effectively inhibited the proliferation,migration,and invasion of SCC-25 cells while promoting apoptosis by suppressing acti-vation of the Wnt/β-catenin pathway.let-7 expression was closely associated with tumor stage,lymph node metastasis,and patient survival status.Patients with low let-7 expression exhibited lower overall survival rate.Conclusion let-7 targets and regulates the Wnt/β-catenin pathway,thereby inhibiting proliferation,migration,and invasion of OSCC cells while promoting apoptosis.

A 62-year-old female osteoporosis patient received alendronate sodium 70 mg orally once a week (taking the drug 30 minutes before breakfast with plenty of water and keeping upright during and after taking drug for a while). After taking the drug for 3 times, the patient developed retrosternal pain on swallowing with occasional acid aversion and epigastric dull pain. Gastroscopy showed multiple shallow ulcers, with yellow and white fur on the surface, in the esophagus 20 cm to 37 cm from the incisors. Esophagitis was considered, which might be related to alendronate sodium. Alendronate was stopped, and the treatments of acid suppression, mucosal repair, proper rehydration, and total liquid intake were given. Two days later, the stabbing pain behind the sternum was relieved; 7 days later, the pain was obviously relieved and symptoms of the acid aversion and epigastric dull pain disappeared; 1 month later, the retrosternal pain on swallowing disappeared.

A 62-year-old female osteoporosis patient received alendronate sodium 70 mg orally once a week (taking the drug 30 minutes before breakfast with plenty of water and keeping upright during and after taking drug for a while). After taking the drug for 3 times, the patient developed retrosternal pain on swallowing with occasional acid aversion and epigastric dull pain. Gastroscopy showed multiple shallow ulcers, with yellow and white fur on the surface, in the esophagus 20 cm to 37 cm from the incisors. Esophagitis was considered, which might be related to alendronate sodium. Alendronate was stopped, and the treatments of acid suppression, mucosal repair, proper rehydration, and total liquid intake were given. Two days later, the stabbing pain behind the sternum was relieved; 7 days later, the pain was obviously relieved and symptoms of the acid aversion and epigastric dull pain disappeared; 1 month later, the retrosternal pain on swallowing disappeared.