Influence of systemic diseases on the diagnosis and treatment of dental diseases and prevention of related risks / 中华口腔医学杂志

Patients with dental problems may suffer from various systemic diseases at the same time. The concomitant systemic diseases can have impacts and risks on the diagnosis, treatment planning and therapeutic practice in dentistry. The author briefly expounds the influences of systemic diseases on dental diagnosis and treatment and the prevention of risks from seven aspects: cardio-cerebral vascular system, blood system, respiratory system, endocrine system, digestive system, genitourinary system, nervous system and mental system, in order to provide references for the dental clinicians.

Consensus of experts on the medical risk prevention for the patients with cardiovascular diseases during dental treatment (2022 edition) / 中华口腔医学杂志

With the aging process of population in the society, the prevalence of cardiovascular diseases (CVD) in China is increasing continuously and the number of dental patients with CVD is increasing gradually too. Due to the lack of guidelines for dental patients with CVD in our country, how to implement standardized preoperative evaluation and perioperative risk prevention remains a problem to be solved for dentists at present. The present expert consensus was reached by combining the clinical experiences of the expert group of the Fifth General Dentistry Special Committee, Chinese Stomatological Association and respiratory and cardiology experts in diagnosis and treatment for CVD patients, and by systematically summarizing the relevant international guidelines and literature regarding the relationship between CVD and oral diseases and the diagnosis and treatment of dental patients with heart failure, hypertension and antithrombotic therapy. The consensus aims to provide, for the dental clinicians, the criteria on diagnosis and treatment of CVD in dental patients in China so as to reduce the risk and complications, and finally to improve the treatment levels of dental patients with CVD in China.

Consensus of experts on the oral health management and medical risk prevention for the patients with chronic airway diseases (2022 edition) / 中华口腔医学杂志

Today, there is greater awareness on the association between oral diseases and respiration diseases after the outbreak of COVID-19. However, confusion regarding the oral health management and medical risk prevention for patients with chronic airway diseases has been remained among dental clinicians. Therefore, the dental experts of the Fifth General Dentistry Special Committee, Chinese Stomatological Association, combined with the experts of respiratory and critical care medicine, undertook the formation of consensus on the oral health management of patients with chronic airway diseases in order to help dental clinicians to evaluate medical risks and make better treatment decision in clinical practice. In the present consensus report, the relationship of oral diseases and chronic airway diseases, the oral health management and the treatment recommendations of patients with chronic airway diseases are provided.

JAK2V617F mutation and TNF-α expression in myeloproliferative neoplasms and their correlation / 中国实验血液学杂志

This study was aimed to explore the JAK2V617F mutation and TNF-α expression in patients with myeloproliferative neoplasm (MPN), and the relation between them so as to provide theoretical basis for clinical practice and target therapy. Sixty-two confirmed BCR-ABL-negative MPN patients and 15 healthy adults were enrolled in this study. The peripheral blood mononuclear cells of the patients and healthy controls were divided into two parts, one part was used to extract DNA, the other one was used to extract mRNA and reverse-transcribe into cDNA. Real-time fluorescent quantitative PCR was used to detect JAK2V617F mutation proportion and the expression level of TNF-α. The results showed that the positive rate of JAK2V617F mutation in MPN patients was 64.52% (40/62) , including 54.28% in essential thrombocythemia (ET) patients (19/35), 94.74% in polycythemia vera (PV) patients (18/19) and 37.50% in myelofibrosis (MF) (3/8) patients. Mutation proportions of JAK2V617F in ET, PV and MF patients were 0.838 ± 0.419, 4.417 ± 0.658, 2.746 ± 2.009 respectively. The expression of TNF-α in ET, PV and MF patients were higher than that in healthy controls: 1.7, 7.0, 8.2-fold (P < 0.05) respectively. In addition, TNF-α expression was correlated with JAK2V617F allele burden (Pearson r = 0.610,R(2) = 0.372,P = 0.005). It is concluded that TNF-α plays an important role in the pathogenesis of MPN, the TNF-α expression increases and is different in ET,PV and MF patients,which correlates with JAK2V617F allele burden.

Protective effect of shenfu injection pretreatment on brain of patients receiving aortic valve replacement undergoing cardiopulmonary bypass / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the protective effect of Shenfu Injection (SFI) pretreatment on brain of patients receiving aortic valve replacement (AVR) undergoing cardiopulmonary bypass (CPB).</p><p><b>METHODS</b>Thirty AVR patients undergoing CPB were randomly assigned to 2 groups, the control group and the experimental group, 15 cases in each group. SFI at 1.5 mL/kg (dissolved in 250 mL 5% glucose solution) was intravenously dripped to those in the experimental group 5 days before operation, once daily for 5 successive days. SFI at 1.5 mL/kg (dissolved in 250 mL 5% glucose solution) was intravenously dripped to those 30 min before anesthesia induction. Equal dose of normal saline was intravenously dripped to those in the control group, and the other procedures were the same as those for patients in the experimental group. The venous blood sample (2 mL) was drawn from the right internal carotid vein immediately after induction of anesthesia (T1),10 min after CPB (T2), 30 min after GPB (T3), 2 h after CPB (T4), 24 h after CPB (T5), and 48 h after CPB (T6), thus detecting the plasma levels of S100beta and neuron specific enolase (NSE). And patients' cognitive function was assessed with mini-mental state examination (MMSE) scale on the day before operation, the 2nd and the 7th day after operation.</p><p><b>RESULTS</b>There was no statistical difference in the levels of S1001 and NSE between the two groups at T1 (P > 0.05). There was statistical difference in the levels of S100beta and NSE between the two groups at T2, T3, T4, T5, T6, when compared with those at T1 (P <0.05). Besides, the levels of S100beta and NSE at T2, T3, T4, T5, T6 were lower in the experimental group than in the control group, showing statistical difference (P <0.05). The MMSE scores decreased on the 2nd day after operation in the two groups, showing statistical difference when compared with those on the day before operation (P <0.05). It was lowered more obviously in the control group. There was no statistical difference in the MMSE score between the 7th day post-operation and the day before operation (P >0.05).</p><p><b>CONCLUSION</b>SFI pretreatment had protective effect on brain in AVR patients undergoing CPB.</p>

Combined effects of hydrostatic pressure and estrogen on osteogenic and chondrogenic differentiation of bone marrow mesenchymal stem cells / 医用生物力学

Objective To investigate the effect of hydrostatic pressure and estrogen on the proliferation, F-actin cytoskeleton, osteogenic and chondrogenic differentiation of rat bone marrow mesenchymal stem cells (BMSCs), and to test whether combined stimulation can exert the fortified stimulating effort on BMSCs． Methods BMSCs were separated by using the whole bone marrow culture method and purified by differential adherence method. BMSCs surface markers were detected by flow cytometer. BMSCs were randomly assigned to six groups：blank control group (Group C), 1 nmol/L 17β-Estradiol treatment group (Group E), 1 nmol/L tamoxifen treatment group (Group T), 90 kPa pressure treatment group for 1 h (Group P); 17β-Estradiol pretreatment for 12 h and 90 kPa pressure group for 1 h (Group P+E); and tamoxifen pretreatmet for 12 h and 90 kPa pressure group for 1 h (Group P+T). Cell cycle was measured by flow cytometry. Fluorescent staining under laser scanning confocal microscope observation was observed for F-actin cytoskeleton expression and re-assembly. After osteogenic differentiation for 7 d and 14 d, calcified nodules were detected with alizarin red staining. Further, the osteogenic markers including Col I, ON, OPN and BSP were analyzed by real-time PCR. Following chondrogenesis of BMSCs for 14 d and 28 d, proteoglycan contents were detected with toluidine blue staining, and chondrogenic markers including Sox9, Aggrecan and ColⅡwere evaluated by real time PCR. ANOVAs followed by the Dunnett t tests were adopted for comparisons among subgroups. All the experimental data were analyzed by SPSS 16.0 software. Results Both hydrostatic pressure (90 kPa, 1 h) and 1 nmol/L17β-estradiol could increase the proliferation of BMSCs and F-actin activation, but no bio-cooperation effects appeared. Calcified nodules were observed after 14 d osteogenic induction. Real-time PCR showed the estrogen enhanced osteogenetic gene (Col I, ON, OPN and BSP) expression in 7 d and 14 d. Combined effects of pressure and estrogen showed synergistic improving effects on early osteogenetic differentiation, but oppositional effects on advanced osteogenetic differentiation. Toluidine blue staining was positive after 28 d chondrogenic induction. With the hydrostatic pressure loading regime, the mRNA expression of chondrogenic genes (Sox9, Aggrecan and ColⅡ) was increased significantly, but with oppositional effects from estrogen on advanced chondrogenic differentiation. Conclusions The superposition effects of mechanical stimulation and estrogen acting only enhanced the differentiation of BMSCs in the early osteogenetic differentiation, but no effect was found in the proliferation and F-actin activation. Hydrostatic pressure and estrogen show antagonistic action in advanced osteogenetic differentiation and chondrogenic differentiation. Estrogen promotes osteogenetic differentiation, while hydrostatic pressure can enhance chondrogenic differentiation of BMSCs.

Study of the influence of emotion stress on mechanical hyperalgesia of masseter muscles in rats / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the influence of emotion stress on mechanical hyperalgesia of masseter muscles in rats through the equipment of communication box.</p><p><b>METHODS</b>50 Sprague-Dawley rats were randomly divided into 5 groups: Control group, emotion stress (ES) group, drug control group, saline treated control group and footshock (FS) group, 10 rats each group. Footshock group only induced emotion stress and was not concerned with the result of the experiment. The last four groups of the rats were placed in communication box and bred under the same conditions during the experiment time. According to Rens' method, von Frey filaments were used to assess the muscle mechanical threshold, head withdrawal, leg raising and crying were observed as pain action.</p><p><b>RESULTS</b>1) During the adaptive period of 7 days before the emotion stress experiment, mechanical pain values of bilateral masseter muscles were descent and were stabilized in the 5 th to 7 th day. In emotion stress period, hyperalgesia of emotion stress group was induced in bilateral masseter muscles, and the peak time was the 7 th day, then it alleviated in the following days and was stabilized in the 12 th to 14 th day, but its pain threshold was lower than blank control group. 2)During the emotion stress period, the change of drug control group was similar to stress group but its pain threshold was higher.</p><p><b>CONCLUSION</b>It is suggested that emotion stress can lead to the hyperalgesia of masseter muscles and antidepressant drug can lower the hyperalgsia resulted of emotion stress.</p>