1.Aerobic glycolysis in colon cancer is repressed by naringin via the HIF1Α pathway.
Guangtao PAN ; Ping ZHANG ; Aiying CHEN ; Yu DENG ; Zhen ZHANG ; Han LU ; Aoxun ZHU ; Cong ZHOU ; Yanran WU ; Sen LI
Journal of Zhejiang University. Science. B 2023;24(3):221-231
Metabolic reprogramming is a common phenomenon in cancer, with aerobic glycolysis being one of its important characteristics. Hypoxia-inducible factor-1α (HIF1Α) is thought to play an important role in aerobic glycolysis. Meanwhile, naringin is a natural flavanone glycoside derived from grapefruits and many other citrus fruits. In this work, we identified glycolytic genes related to HIF1Α by analyzing the colon cancer database. The analysis of extracellular acidification rate and cell function verified the regulatory effects of HIF1Α overexpression on glycolysis, and the proliferation and migration of colon cancer cells. Moreover, naringin was used as an inhibitor of colon cancer cells to illustrate its effect on HIF1Α function. The results showed that the HIF1Α and enolase 2 (ENO2) levels in colon cancer tissues were highly correlated, and their high expression indicated a poor prognosis for colon cancer patients. Mechanistically, HIF1Α directly binds to the DNA promoter region and upregulates the transcription of ENO2; ectopic expression of ENO2 increased aerobic glycolysis in colon cancer cells. Most importantly, we found that the appropriate concentration of naringin inhibited the transcriptional activity of HIF1Α, which in turn decreased aerobic glycolysis in colon cancer cells. Generally, naringin reduces glycolysis in colon cancer cells by reducing the transcriptional activity of HIF1Α and the proliferation and invasion of colon cancer cells. This study helps to elucidate the relationship between colon cancer progression and glucose metabolism, and demonstrates the efficacy of naringin in the treatment of colon cancer.
Glycolysis
;
Colonic Neoplasms/metabolism*
;
Humans
;
Hypoxia-Inducible Factor 1, alpha Subunit/metabolism*
;
Phosphopyruvate Hydratase/metabolism*
;
Flavanones/pharmacology*
;
Cell Line, Tumor
;
Databases, Genetic
;
Cell Proliferation/drug effects*
;
Transfection
;
Warburg Effect, Oncologic
2.Acupoint thread-embedding for children with tic disorders of spleen deficiency and liver hyperactivity and its effect on serum level of NSE.
Chinese Acupuncture & Moxibustion 2023;43(11):1261-1265
OBJECTIVES:
To observe the clinical efficacy of acupoint thread-embedding for children with tic disorders of spleen deficiency and liver hyperactivity and its effect on serum level of neuron-specific enolase (NSE).
METHODS:
A total of 68 children with tic disorders of spleen deficiency and liver hyperactivity were randomized into an observation group (34 cases, 1 case dropped out) and a control group (34 cases, 3 cases dropped out, 1 case was eliminated). In the observation group, acupoint thread-embedding was applied at Baihui (GV 20) and bilateral Hegu (LI 4), Taichong (LR 3), Pishu (BL 20), Ganshu (BL 18), Quchi (LI 11), Zusanli (ST 36),etc., once every 4 weeks. In the control group, tiapride hydrochloride tablet was given orally, twice a day. Both groups were treated for 12 weeks. Before and after treatment, the Yale global tic severity scale (YGTSS) score and serum level of NSE were observed in the two groups, and the clinical efficacy was evaluated.
RESULTS:
After treatment, except for vocal tic score of YGTSS in the control group, the each-item scores and total scores of YGTSS and serum levels of NSE in the two groups were decreased compared with those before treatment (P<0.05); the each-item scores and total score of YGTSS and serum level of NSE in the observation group were lower than those in the control group (P<0.05). The total effective rate in the observation group was 87.9% (29/33), which was higher than 76.7% (23/30) in the control group (P<0.05).
CONCLUSIONS
Acupoint thread-embedding has a good effect in the treatment of children with tic disorders of spleen deficiency and liver hyperactivity, could reduce the YGTSS score and serum level of NSE.
Humans
;
Child
;
Spleen
;
Acupuncture Points
;
Liver
;
Tic Disorders/therapy*
;
Phosphopyruvate Hydratase
3.Effect of transcranial direct current stimulation on neurological injury markers and prognosis in patients with acute and severe carbon monoxide poisoning.
Yue Ru DU ; Yan Xue DU ; Pu WANG ; Wei Zhan WANG
Chinese Journal of Industrial Hygiene and Occupational Diseases 2023;41(1):39-43
Objective: To observe the effects of transcranial direct current stimulation (tDCS) on nerve injury markers and prognosis in patients with acute severe carbon monoxide poisoning (ASCOP) . Methods: In May 2021, 103 ASCOP patients were treated in the emergency department of Harrison International Peace Hospital of Hebei Medical University from November 2020 to January 2021. The patients were divided into two groups according to whether they received tDCS treatment. The control group (50 cases) were given oxygen therapy (hyperbaric oxygen and oxygen inhalation) , reducing cranial pressure, improving brain circulation and cell metabolism, removing oxygen free radicals and symptomatic support, and the observation group (53 cases) was treated with 2 weeks of tDCS intensive treatment on the basis of conventional treatment. All patients underwent at least 24 h bispectral index (BIS) monitoring, BIS value was recorded at the hour and the 24 h mean value was calculated. Neuron-specific enolase (NSE) and serum S100B calcium-binding protein (S100B) were detected after admission, 3 d, 7 d and discharge. Follow-up for 60 days, the incidence and time of onset of delayed encephalopathy (DEACMP) with acute carbon monoxide poisoning in the two groups were recorded. Results: The NSE and S100B proteins of ASCOP patients were significantly increased at admission, but there was no significant difference between the two groups (P=0.711, 0.326) . The NSE and S100B proteins were further increased at 3 and 7 days after admission. The increase in the observation group was slower than that in the control group, and the difference was statistically significant (P(3 d)=0.045, 0.032, P(7 d)=0.021, 0.000) ; After 14 days, it gradually decreased, but the observation group decreased rapidly compared with the control group, with a statistically significant difference (P=0.009, 0.025) . The 60 day follow-up results showed that the incidence of DEACMP in the observation group was 18.87% (10/53) , compared with 38.00% (19/50) in the control group (P=0.048) ; The time of DEACMP in the observation group[ (16.79±5.28) d] was later than that in the control group[ (22.30±5.42) d], and the difference was statistically significant (P=0.013) . Conclusion: The early administration of tDCS in ASCOP patients can prevent the production of NSE and S100B proteins, which are markers of nerve damage. and can improve the incidence and time of DEACMP.
Humans
;
Biomarkers
;
Brain Diseases/therapy*
;
Carbon Monoxide Poisoning/therapy*
;
Oxygen
;
Phosphopyruvate Hydratase
;
Prognosis
;
S100 Calcium Binding Protein beta Subunit
;
Transcranial Direct Current Stimulation
4.Diagnostic values of conventional tumor markers and their combination with chest CT for patients with stageⅠA lung cancer.
Qin PENG ; Ning WU ; Yao HUANG ; Shi Jun ZHAO ; Wei TANG ; Min LIANG ; Yu Liang RAN ; Ting XIAO ; Lin YANG ; Xin LIANG
Chinese Journal of Oncology 2023;45(11):934-941
Objective: To investigate the diagnostic efficiency of conventional serum tumor markers and their combination with chest CT for stage ⅠA lung cancer. Methods: A total of 1 155 patients with stage ⅠA lung cancer and 200 patients with benign lung lesions (confirmed by surgery) treated at the Cancer Hospital, Chinese Academy of Medical Sciences from January 2016 to October 2020 were retrospectively enrolled in this study. Six conventional serum tumor markers [carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), squamous cell carcinoma associated antigen (SCCA), cytokeratin 19 fragment (CYFRA21-1), neuron-specific enolase (NSE), and gastrin-releasing peptide precursor (ProGRP)] and chest thin-slice CT were performed on all patients one month before surgery. Pathology was taken as the gold standard to analyze the difference of positivity rates of tumor markers between the lung cancer group and the benign group, the moderate/poor differentiation group and the well differentiation group, the adenocarcinoma group and the squamous cell carcinoma group, the lepidic and non-lepidic predominant adenocarcinoma groups, the solid nodule group and the subsolid nodule group based on thin-slice CT, and subgroups of ⅠA1 to ⅠA3 lung cancers. The diagnostic performance of tumor markers and tumor markers combined with chest CT was analyzed using the receiver operating characteristic curve. Results: The positivity rates of six serum tumor markers in the lung cancer group and the benign group were 2.32%-20.08% and 0-13.64%, respectively; only the SCCA positivity rate in the lung cancer group was higher than that in the benign group (10.81% and 0, P=0.022). There were no significant differences in the positivity rates of other serum tumor markers between the two groups (all P>0.05). The combined detection of six tumor markers showed that the positivity rate of the lung cancer group was higher than that of the benign group (40.93% and 18.18%, P=0.004), and the positivity rate of the adenocarcinoma group was lower than that of the squamous cell carcinoma group (35.66% and 47.41%, P=0.045). The positivity rates in the poorly differentiated group and moderately differentiated group were higher than that in the well differentiated group (46.48%, 43.75% and 22.73%, P=0.025). The positivity rate in the non-lepidic adenocarcinoma group was higher than that in lepidic adenocarcinoma group (39.51% and 21.74%, P=0.001). The positivity rate of subsolid nodules was lower than that of solid nodules (30.01% vs 58.71%, P=0.038), and the positivity rates of stageⅠA1, ⅠA2 and ⅠA3 lung cancers were 33.33%, 48.96% and 69.23%, respectively, showing an increasing trend (P=0.005). The sensitivity and specificity of the combined detection of six tumor markers in the diagnosis of stage ⅠA lung cancer were 74.00% and 56.30%, respectively, and the area under the curve (AUC) was 0.541. The sensitivity and specificity of the combined detection of six serum tumor markers with CT in the diagnosis of stage ⅠA lung cancer were 83.0% and 78.3%, respectively, and the AUC was 0.721. Conclusions: For stage ⅠA lung cancer, the positivity rates of commonly used clinical tumor markers are generally low. The combined detection of six markers can increase the positivity rate. The positivity rate of markers tends to be higher in poorly differentiated lung cancer, squamous cell carcinoma, or solid nodules. Tumor markers combined with thin-slice CT showed limited improvement in diagnostic efficiency for early lung cancer.
Humans
;
Lung Neoplasms/diagnostic imaging*
;
Biomarkers, Tumor
;
Retrospective Studies
;
Antigens, Neoplasm
;
Keratin-19
;
Carcinoembryonic Antigen
;
Adenocarcinoma/diagnostic imaging*
;
Carcinoma, Squamous Cell/diagnostic imaging*
;
Phosphopyruvate Hydratase
;
Tomography, X-Ray Computed
5.Diagnostic values of conventional tumor markers and their combination with chest CT for patients with stageⅠA lung cancer.
Qin PENG ; Ning WU ; Yao HUANG ; Shi Jun ZHAO ; Wei TANG ; Min LIANG ; Yu Liang RAN ; Ting XIAO ; Lin YANG ; Xin LIANG
Chinese Journal of Oncology 2023;45(11):934-941
Objective: To investigate the diagnostic efficiency of conventional serum tumor markers and their combination with chest CT for stage ⅠA lung cancer. Methods: A total of 1 155 patients with stage ⅠA lung cancer and 200 patients with benign lung lesions (confirmed by surgery) treated at the Cancer Hospital, Chinese Academy of Medical Sciences from January 2016 to October 2020 were retrospectively enrolled in this study. Six conventional serum tumor markers [carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), squamous cell carcinoma associated antigen (SCCA), cytokeratin 19 fragment (CYFRA21-1), neuron-specific enolase (NSE), and gastrin-releasing peptide precursor (ProGRP)] and chest thin-slice CT were performed on all patients one month before surgery. Pathology was taken as the gold standard to analyze the difference of positivity rates of tumor markers between the lung cancer group and the benign group, the moderate/poor differentiation group and the well differentiation group, the adenocarcinoma group and the squamous cell carcinoma group, the lepidic and non-lepidic predominant adenocarcinoma groups, the solid nodule group and the subsolid nodule group based on thin-slice CT, and subgroups of ⅠA1 to ⅠA3 lung cancers. The diagnostic performance of tumor markers and tumor markers combined with chest CT was analyzed using the receiver operating characteristic curve. Results: The positivity rates of six serum tumor markers in the lung cancer group and the benign group were 2.32%-20.08% and 0-13.64%, respectively; only the SCCA positivity rate in the lung cancer group was higher than that in the benign group (10.81% and 0, P=0.022). There were no significant differences in the positivity rates of other serum tumor markers between the two groups (all P>0.05). The combined detection of six tumor markers showed that the positivity rate of the lung cancer group was higher than that of the benign group (40.93% and 18.18%, P=0.004), and the positivity rate of the adenocarcinoma group was lower than that of the squamous cell carcinoma group (35.66% and 47.41%, P=0.045). The positivity rates in the poorly differentiated group and moderately differentiated group were higher than that in the well differentiated group (46.48%, 43.75% and 22.73%, P=0.025). The positivity rate in the non-lepidic adenocarcinoma group was higher than that in lepidic adenocarcinoma group (39.51% and 21.74%, P=0.001). The positivity rate of subsolid nodules was lower than that of solid nodules (30.01% vs 58.71%, P=0.038), and the positivity rates of stageⅠA1, ⅠA2 and ⅠA3 lung cancers were 33.33%, 48.96% and 69.23%, respectively, showing an increasing trend (P=0.005). The sensitivity and specificity of the combined detection of six tumor markers in the diagnosis of stage ⅠA lung cancer were 74.00% and 56.30%, respectively, and the area under the curve (AUC) was 0.541. The sensitivity and specificity of the combined detection of six serum tumor markers with CT in the diagnosis of stage ⅠA lung cancer were 83.0% and 78.3%, respectively, and the AUC was 0.721. Conclusions: For stage ⅠA lung cancer, the positivity rates of commonly used clinical tumor markers are generally low. The combined detection of six markers can increase the positivity rate. The positivity rate of markers tends to be higher in poorly differentiated lung cancer, squamous cell carcinoma, or solid nodules. Tumor markers combined with thin-slice CT showed limited improvement in diagnostic efficiency for early lung cancer.
Humans
;
Lung Neoplasms/diagnostic imaging*
;
Biomarkers, Tumor
;
Retrospective Studies
;
Antigens, Neoplasm
;
Keratin-19
;
Carcinoembryonic Antigen
;
Adenocarcinoma/diagnostic imaging*
;
Carcinoma, Squamous Cell/diagnostic imaging*
;
Phosphopyruvate Hydratase
;
Tomography, X-Ray Computed
6.Clinical features of neuroblastoma: an analysis of 44 children.
Cheng-Guang ZHU ; Xiang-Ling HE ; Zhi-Ge TANG ; Ke-Ke CHEN ; Run-Ying ZOU ; Xin TIAN ; Ya-Lan YOU
Chinese Journal of Contemporary Pediatrics 2020;22(11):1193-1197
OBJECTIVE:
To study the clinical features of neuroblastoma (NB) and the factors influencing survival rate.
METHODS:
A total of 44 children with NB who were admitted from April 2016 to February 2020 were enrolled as research subjects. A retrospective analysis was performed on their medical data and follow-up data.
RESULTS:
The common clinical symptoms of these 44 children were fever (10/44, 23%), mass (9/44, 20%), abdominal pain (8/44, 18%), cough (7/44, 16%), pale complexion (3/44, 7%), claudication (2/44, 5%), and abnormal activity (2/44, 5%). According to the INSS stage, 2 children (4%) had stage I NB, 5 children (11%) had stage II NB, 5 children (11%) had stage III NB, and 32 children (73%) had stage IV NB. The mean follow-up time was (15.3±1.5) months, with a recurrence rate of 20% and an overall survival rate of 82%. Among the 44 children, 29 (66%) achieved event-free survival and 7 (16%) had survival with tumor. The univariate analysis showed that a pathological type of NB and an increase in serum neuron-specific enolase (NSE) decreased the overall survival rate of children with NB (P<0.05).
CONCLUSIONS
The clinical symptoms of children with NB are not specific at the first visit. Fever, abdominal pain, and mass are common symptoms, and there is a high proportion of children in the advanced stage. The pathological type of NB and an increase in serum NSE may be associated with a reduction in the overall survival rate of children with NB.
Child
;
Humans
;
Infant
;
Infant, Newborn
;
Neoplasm Recurrence, Local
;
Neoplasm Staging
;
Neuroblastoma
;
Phosphopyruvate Hydratase
;
Retrospective Studies
;
Survival Rate
7.Use of neuron-specific enolase to predict mild brain injury in motorcycle crash patients with maxillofacial fractures: A pilot study.
Muhammad RUSLIN ; Jan WOLFF ; Harmas Yazid YUSUF ; Muhammad Zaifullah ARIFIN ; Paolo BOFFANO ; Tymour FOROUZANFAR
Chinese Journal of Traumatology 2019;22(1):47-50
PURPOSE:
Mild traumatic brain injury (TBI) is common but accurate diagnosis and its clinical consequences have been a problem. Maxillofacial trauma does have an association with TBI. Neuron-specific enolase (NSE) has been developed to evaluate neuronal damage. The objective of this study was to investigate the accuracy of NSE serum levels to detect mild brain injury of patients with sustained maxillofacial fractures during motor vehicle accidents.
METHODS:
Blood samples were drawn from 40 healthy people (control group) and 48 trauma patients who had sustained isolated maxillofacial fractures and mild brain injury in motor vehicle accidents. Brain injuries were graded by Glasgow Coma Scale. In the trauma group, correlations between the NSE serum value and different facial fracture sites were also assessed.
RESULTS:
The NSE serum level (mean ± SD, ng/ml) in the 48 patients with maxillofacial fractures and mild TBI was 13.12 ± 9.68, significantly higher than that measured in the healthy control group (7.72 ± 1.82, p < 0.001). The mean NSE serum level (ng/ml) in the lower part of the facial skeleton (15.44 with SD 15.34) was higher than that in the upper facial part (12.42 with SD 7.68); and the mean NSE level (ng/ml) in the middle-and lower part (11.97 with SD 5.63) was higher than in the middle part (7.88 with SD 2.64).
CONCLUSION
An increase in NSE serum levels can be observed in patients sustained maxillofacial fractures and mild brain injury.
Accidents, Traffic
;
Adult
;
Aged
;
Biomarkers
;
blood
;
Brain Injuries, Traumatic
;
diagnosis
;
Craniocerebral Trauma
;
Female
;
Humans
;
Male
;
Maxillary Fractures
;
Maxillofacial Injuries
;
Mesencephalon
;
injuries
;
Middle Aged
;
Motorcycles
;
Phosphopyruvate Hydratase
;
blood
;
Predictive Value of Tests
;
Young Adult
8.Effect of modified Buyang Huanwu Decoction on hemorrhagic transformation after rt-PA intravenous thrombolysis in patients with super early cerebral infarction.
Yong-Kun LU ; Hai-Yan YANG ; Xiang-Zhe LIU ; Yan-Hua WANG ; Jun-Hong YANG
China Journal of Chinese Materia Medica 2019;44(8):1696-1703
To study the effect of modified Buyang Huanwu Decoction on the hemorrhagic transformation after intravenous thrombolysis of recombinant tissue type plasminogen activator(rt-PA) in patients with super early(onset time<4. 5 h) cerebral infarction. From March 2016 to July 2018,at the brain disease zone of the First Affiliated Hospital of Henan University of Traditional Chinese Medicine,212 cases of super early cerebral infarction were selected and divided into two group according to the randomized complete blocks designs: control group(106 cases) and traditional Chinese medicine group(106 cases). The control group was treated with rt-PA intravenous thrombolysis,while the traditional Chinese medicine group was treated with modified Buyang Huanwu Decoction in addition to the therapy of the control group. Both groups were treated for 14 days. Neurological deficit score,serum matrix metalloproteinase-9(MMP-9),neuron specific enolase(NSE),vascular endothelial growth factor(VEGF) and plasma cellular fibronectin(c-FN) levels,the incidence of hemorrhagic transformation,clinical efficacy and adverse drug reactions before and after treatment were compared between the two groups. According to the findings,at the 14 thday after treatment,the rank sum test of the grade data showed that the clinical efficacy of the traditional Chinese medicine group was better than that of the control group(Z =-2. 033,P = 0. 042); on the basis of χ2 test,the total efficiency of the traditional Chinese medicine group was higher than that of the control group(χ2= 4. 895,P =0. 027); the hemorrhagic transformation rate of the traditional Chinese medicine group was lower than that of the control group within14 days of treatment(χ2= 3. 962,P = 0. 047). MMP-9 levels in the traditional Chinese medicine group were lower than those in the control group at the 3 rd,5 th,7 th,10 th,14 thd after treatment(t =-2. 474,-3. 022,-5. 163,-6. 998,-9. 821; P = 0. 014,0. 003,0,0,0). The improvement of c-FN,NSE,VEGF and NIHSS scores in the traditional Chinese medicine group was superior to that of the control group after 14 days of treatment(t =-2. 343,-3. 187,-2. 129,-3. 105; P = 0. 020,0. 002,0. 034,0. 002). No obvious adverse reactions of modified Buyang Huanwu Decoction were observed during 14 days of treatment. Modified Buyang Huanwu Decoction could reduce the expressions of MMP-9,c-FN,NSE and VEGF after rt-PA intravenous thrombolysis in patients with super early cerebral infarction,and decrease the hemorrhagic transformation rate after thrombolysis,with high safety.
Cerebral Infarction
;
drug therapy
;
Drugs, Chinese Herbal
;
therapeutic use
;
Fibronectins
;
blood
;
Humans
;
Matrix Metalloproteinase 9
;
blood
;
Medicine, Chinese Traditional
;
Phosphopyruvate Hydratase
;
blood
;
Recombinant Proteins
;
therapeutic use
;
Thrombolytic Therapy
;
Tissue Plasminogen Activator
;
therapeutic use
;
Vascular Endothelial Growth Factor A
;
blood
9.Clinical value of serum neuroglobin in evaluating hypoglycemic brain injury in neonates.
Feng-Yuan JIANG ; Hui-Ping LIU ; Li-Ting CHEN ; Zhong-Rui SONG ; Shang XU ; Yu-Xiu GUO ; Lin ZHOU ; Yu-Kun WANG ; Gui-Hua SHU
Chinese Journal of Contemporary Pediatrics 2019;21(6):573-579
OBJECTIVE:
To study the clinical value of serum neuroglobin in evaluating hypoglycemic brain injury in neonates.
METHODS:
A total of 100 neonates with hypoglycemia were enrolled as subjects. According to amplitude-integrated EEG (aEEG) findings and/or clinical manifestations, they were divided into symptomatic hypoglycemic brain injury group (n=22), asymptomatic hypoglycemic brain injury group (n=37) and hypoglycemic non-brain injury group (n=41). The three groups were compared in terms of blood glucose, duration of hypoglycemia, levels of neuroglobin and neuron-specific enolase (NSE), and modified aEEG score. The correlation of neuroglobin with NSE and modified aEEG score was analyzed. The receiver operating characteristic (ROC) curve was plotted.
RESULTS:
Compared with the asymptomatic hypoglycemic brain injury and hypoglycemic non-brain injury groups, the symptomatic hypoglycemic brain injury group had significantly lower blood glucose and modified aEEG score, significantly higher neuroglobin and NSE levels, and a significantly longer duration of hypoglycemia (P<0.05). Compared with the hypoglycemic non-brain injury group, the asymptomatic hypoglycemic brain injury group had significantly lower blood glucose and modified aEEG score, significantly higher neuroglobin and NSE levels, and a significantly longer duration of hypoglycemia (P<0.05). Neuroglobin was positively correlated with NSE and duration of hypoglycemia (r=0.922 and 0.929 respectively; P<0.05) and negatively correlated with blood glucose and modified aEEG score (r=-0.849 and -0.968 respectively; P<0.05). The areas under the ROC curve of neuroglobin, NSE and modified aEEG score were 0.894, 0.890 and 0.941 respectively, and neuroglobin had a sensitivity of 80.8% and a specificity of 95.8% at the optimal cut-off value of 108 mg/L.
CONCLUSIONS
Like NSE and modified aEEG score, serum neuroglobin can also be used as a specific indicator for the assessment of brain injury in neonates with hypoglycemia and has a certain value in clinical practice.
Brain Injuries
;
Electroencephalography
;
Humans
;
Hypoglycemic Agents
;
Infant, Newborn
;
Neuroglobin
;
blood
;
Phosphopyruvate Hydratase
10.Virulence genes of Streptococcus mutans and dental caries
International Journal of Oral Biology 2019;44(2):31-36
Streptococcus mutans is one of the important bacteria that forms dental biofilm and cause dental caries. Virulence genes in S. mutans can be classified into the genes involved in bacterial adhesion, extracellular polysaccharide formation, biofilm formation, sugar uptake and metabolism, acid tolerance, and regulation. The genes involved in bacterial adhesion are gbps (gbpA, gbpB, and gbpC) and spaP. The gbp genes encode glucan-binding protein (GBP) A, GBP B, and GBP C. The spaP gene encodes cell surface antigen, SpaP. The genes involved in extracellular polysaccharide formation are gtfs (gtfB, gtfC, and gtfD) and ftf, which encode glycosyltransferase (GTF) B, GTF C, and GTF D and fructosyltransferase, respectively. The genes involved in biofilm formation are smu630, relA, and comDE. The smu630 gene is important for biofilm formation. The relA and comDE genes contribute to quorum-sensing and biofilm formation. The genes involved in sugar uptake and metabolism are eno, ldh, and relA. The eno gene encodes bacterial enolase, which catalyzes the formation of phosphoenolpyruvate. The ldh gene encodes lactic acid dehydrogenase. The relA gene contributes to the regulation of the glucose phosphotransferase system. The genes related to acid tolerance are atpD, aguD, brpA, and relA. The atpD gene encodes F1F0-ATPase, a proton pump that discharges H⁺ from within the bacterium to the outside. The aguD gene encodes agmatine deiminase system and produces alkali to overcome acid stress. The genes involved in regulation are vicR, brpA, and relA.
Agmatine
;
Alkalies
;
Antigens, Surface
;
Bacteria
;
Bacterial Adhesion
;
Biofilms
;
Dental Caries
;
Glucose
;
Lactic Acid
;
Metabolism
;
Oxidoreductases
;
Phosphoenolpyruvate
;
Phosphopyruvate Hydratase
;
Proton Pumps
;
Streptococcus mutans
;
Streptococcus
;
Virulence

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