AIM: To investigate whether and how N, N-dimethylsphingosine (DMS) plays a role in modulating the adhesion of monocytes to vascular endothelial cells, and identify whether human umbilical vein endothelial cell line EA.hy926 take place of the vascular endothelial cells.METHODS: Adhesion ratio was measured by flow cytometry, and immunohistochemistry was used to detect the expression of ICAM-1 and P-selectin in HUVEC: EA.hy926 cells after the effect of DMS. RESULTS: DMS inhibited the adhesion of monocytes to HUVEC: EA.hy926 cells in a time-dependent and concentration-dependent manner by reducing the expression of ICAM-1 and P-selectin. CONCLUSIONS: DMS reduced adhesion molecule expression in vascular endothelial cells. DMS may be an important contributor to reduce adhesion ratio, suggesting that DMS plays a negative role in proinflammatory and immune functions of the modified vascular endothelial cells during atherosclerosis and restenosis.

The etiology and pathogenesis of inflammatory bowel disease are up to now still not clear and definite. Establishing the ideal animal model to study its cause and pathogenesis of this disease is very important. The ideal animal model should have the same manifestation with human inflammatory bowel disease on clinical and pathologic feature etc. In this article, the method, the pathologic character istics and concerning pathogenesis, of a few common useful experiment animal models are discussed. [

Objective To summarize the experiences of ultrasonic liposuction in 204 cases, and to analyze the advantages and disadvantages of this technique. Methods The ultrasonic system (SILBERGEE E.U.A. TM ) and the liposuction equipment (HEROULES TM , American) were applied with the tumescent technique in 204 cases. Results Satisfactory rate was 90.69 %. After operation the highest sucked fat quantity was 6 800 ml, and the fewest quantity 250 ml, with an average of 1 907.6 ml for each case. Average volume of sucked fat in each position was 1 005.5 ml, which exceeded that by the traditional method. Advantages of this technique were larger fat quantity, obvious effect, less bleeding and pain, and safety. Disadvantages and complications were rough and uneven surface, accumulation of the liquid, bilateral asymmetry, slow wound healing, subcutaneous ecchymosis and hardening nodule, and even decreased blood pressure. The corresponding processing technique was recommended after liposuction. Conclusion This method is a simple and convenient, safe and reliable technique. It is suggested that multiple times and less portions of liposuction may be of benefit to patients.

Abstract: Objective To analyze the changes of coagulation indicators in patients with hepatitis B complicated with Clonorchis sinensis (C. Sinensis), and provide reference value for diagnosis, drug using and prognosis monitoring. Methods　The patient samples were collected from the Third Affiliated Hospital of Sun Yat-sen University from June 2018 to February 2022 and divided into six groups. They were 40 healthy patients, 47 patients with simple chronic hepatitis B, 47 patients with post-hepatitis B liver cirrhosis, 40 patients with C. Sinensis mono-infection, 30 patients with chronic hepatitis B patients co-infected with C. Sinensis and 27 patients with post-hepatitis B liver cirrhosis patients coinfected with C. Sinensis. Four coagulation indexes, prothrombin time (PT), activated partial thromboplastin time (APTT), thrombin time (TT) and fibrinogen (FIB), were detected and compared among the groups. Results Compared with the healthy group, C. Sinensis mono-infection group had higher level of FIB and delayed PT, APTT; chronic hepatitis B group and chronic hepatitis B patients co-infected with C. Sinensis group had delayed PT, APTT, TT and significant lower FIB, these differences were statistically significant (all P<0.05). Compared with simple chronic hepatitis B group, post-hepatitis B liver cirrhosis and chronic hepatitis B patients co-infected with C. Sinensis had significant delayed PT, APTT, TT and lower FIB (all P<0.05). Compared with the post-hepatitis B liver cirrhosis and chronic hepatitis B patients co-infected with C. Sinensis, post-hepatitis B liver cirrhosis patients coinfected with C. Sinensis group had significant delayed PT, APTT, TT and lower FIB (all P<0.05). Conclusions The coinfection of C. Sinensis will further aggravate the coagulation dysfunction of HBV patients, leading to poor treatment and prognosis. HBV patients will have worse coagulation function in the process to post-hepatitis B liver cirrhosis; Therefore, it is important to pay attention to C. Sinensis co-infection when treating HBV patients, so that further guidance on clinical use and monitoring of prognosis can be provided.

ObjectiveTo investigate MR imaging features of endolymphatic sac and vestibular aqueduct in patients with large vestibular aqueduct syndrome (LVAS) and its correlation with hearing loss.MethodsMR imaging findings of LVAS were analyzed in 31 cases (62 ears) retrospectively.MR imaging features were grouped into 4 types.In the first type,the signals of endolymphatic and vesitibular aqueduct were hypointense without any hyperintense area.In the second type,the signals of endolymphatic sac and vestibular were hyperintense which were confined within vestibular fissure.In the third type,the area from vestibular aqueduct backward out of the edge of the petrous bone was hyperintense,but its lower boundary was above posterior semicircular.In the fourth type the area which was hyperintense was below the posterior semicircular.To avoid errors in visual inspection,the hyperintense and hypointense area of endolymphatic and the signal intensity of vestibular aqueduct and cerebrospinal fluid (CSF)were measured.The differences of signal intensity among the vestibular endolymphatic sac between the high-signal areas and lowsignal areas were compared with paired t-test.The correlation of the endolymphatic sac MRI classification and degree of hearing losswasanalyzedby correctedChi-squaretestandSpearmancorrelation analysis.ResultTen ears belonged to type Ⅰ (moderate hearing loss in 1 ear,severe in 4 ears,profound in 5 ears),17 ears belonged to type Ⅱ ( moderate hearing loss in 1 ear; severe in 5 ears,profound in 11 ears),23 ears to type Ⅲ (moderate hearing loss in 3 ear,severe in 5 ears,profound in 15 ears) and 12 ears belonged to Ⅳ(mild hearing loss in 1 ear,moderate in 1 ear,severe 3 ear,profound in 7 ears).The boundary between hyperintense and hypointense area was clear,and the signal intensity ratios was 2.02 ± 0.06.The signal ratios of hyperintense and hypointense area to vestibular and CSF were 0.95 ±0.12,0.49 ±0.10,0.99 ± 0.08 respecitively.So there was statistical significant difference between hyperintense and hypointense area ( t =- 24.966,P ＜ 0.05 ),but there was no statistical significant difference between hyperintense area and vesitbular( t =-24.966,P ＞ 0.05).There was no difference of hearing loss between different MRI types ( likelihood ratio =5.02,P ＞ 0.05 ).Conclusions Not only endolymphatic sac enlarged but also perilymph herniated into skeletal fissures of vestibular aqueduct in patients with LVAS.The signal intensity of the endolymphatic sac did not show significant correlation with degree of hearing loss.

Objective To analyze epidemiological characteristics of mitochondrial DNA12SrRNA A1555G mutation in Chinese populations with non-syndromic sensorineural hearing loss by the literature review and find the main actual deficiencies in course of epidemiological study.Methods From Cbmdisc and PUBMED database pulled out were all published epidemiological literatures about Chinese mtDNA12SrRNA A1555G mutation from 1996 to 2008.Reviewed were the primary data of these studies including the number of samples,demographic characteristics of the samples,mutation frequencies,interrelations between the mutation and aminoglycoside exposure and so on.Results 21 papers out of 25 were induded in this study.The patients had non-syndromic sensorineural hearing loss from 14 regions of China.A total of 3 473 were found including 230 patients with A1555G mutation and the average mutation frequency was 6.62%.The samples in each regions ranged from 72 to 802 and the reported mutation frequencies were from 0.67%-14.6%.The statistical discrepancy was significant among mutation frequencies in different regions by χ~2 test(P=0.0000).The number of patients with aminoglycoside antibiotics exposure was 739 including 100 with A1555G mutation in all literatures.The proportions in different regions were from 2.70% to 33.33% with the average of 13.53%.The average proportion was significantly higher than the mutation frequency in patients with non-syndromic sensorineural hearing loss.Conclusion Some deficiencies in epidemiological research Omutation in China included age,ethnic,and geographic bias,insufficiency of samples,inadequate randomization and so on.Researchers should focus with more efforts on the epidemiological characteristics of A1555G mutation in Chinese people.

Female ; Humans ; Hypothyroidism ; drug therapy ; Infant, Newborn ; Thyroxine ; poisoning ; therapeutic use

Objeetive To explore the analgesic and hemostatic effect of lidocaine gelatin fiber used after endoscopic sinus surgery.Methods 86 patients underwent endoscopic sinus surgery were randomly divided into A and B groups.In A group,20％ lidocaine gelatin fiber and expansion hemostatic sponge was packed into 43 patients' nasalcavity,while in B group,only expansion hemostatic sponge was packed.Nasal bleeding in patients while packed material within 24 hours and when extracted the material were observed.The analgesic effects were evaluated after packing material 1,6,12,and 24 hours after surgery.Results In A group,the amount of bleeding was (16.30 ± 5.19)ml,while the amount was(32.30 ± 12.09) ml in group B.Statistical analysis showed significant difference(t =7.97,P ＜0.05).There were no significant differences in nasal bleeding when extracted the stuffing and in analgesic efficiency 1hour after surgery.But the analgesic efficiency of lidocaine gelatin fiber was 20％,which was better than expansion hemostatic sponge 6 ～24 hours after surgery (t =27.163,29.091,16.241,all P ＜ 0.05).Conclusion Lidocaine gelatin fiber not only had better hemostasis,but also had better analgesia than expansion hemostatic sponge after endoscopic sinus surgery.

BACKGROUND:For on-visit root canal therapy, ultrasound washing can improve the quality of root canal irrigation, and play a synergistic role with ultrasound so that the flushing fluid can reach the area that cannot be completely cleaned up by root canal preparation instruments, such as apical isthmus and col ateral root canal, for removal of the detritus, cleanup and disinfection. ＜br> OBJECTIVE:To evaluate the clinical effect of one-visit root treatment with nickel-titanium rotary instruments and ultrasonic irrigation unit in treatment of chronic apical periodontitis. ＜br> METHODS:A total of 460 patients with il ed 460 teeth were selected. Patients were randomly divided into three groups:Mtwo instrument and ultrasonic technique combined with sodium hypochlorite was utilized in group A;ultrasonic technique combined with active silver ion antibacterial solution was utilized in group B;stainless steel K files with saline and hydrogen peroxide solution were used as irrigations in group C. Twenty-four hours after root canal fil ing, the pain degree was self-assessed by patients with visual analogue scale, and subsequent visit was done 7 days after root canal fil ing. Six and twelve months after root canal fil ing, the therapeutic effect was determined with X-ray examination and clinical assessment. ＜br> RESULTS AND CONCLUSION:The degree of pain and occurrence rate of acute reactions in groups A and B were significantly lower than those in group C (P＜0.05), but there was no significant difference between groups A and B (P>0.05). Six months after root canal fil ing, the cure rate was not significantly different between three groups (P>0.05). But after 12 months, the cure rate in the group C was significantly lower than that in groups A and B (P＜0.05). By using of nickel-titanium rotary instruments and ultrasonic irrigation unit in treatment of chronic apical periodontitis, the short-and long-term effects of one-visit root treatment have been achieved clinical y.

Objective:To study the influence of anesthesia with propofol or with ketamine on autonomic nerve function in children. Methods: 35 children aged 3-8 years old undergoing general anesthesia for palatoplasty with ASAⅠ-Ⅱ cleft palate were randomly divided into 2 groups, group Ⅰ(ketamine group,n=17)and group Ⅱ (propofol group, n=18).The low frequency (LF), high frequency (HF), ratio of low frequency and high frequency (LF/HF),total power (LF+HF), MAP, HR and SpO_2 were recorded before anesthesia (T0), after intubation (T1), incision of skin(T2), 1 h after the begining of operation(T3), after the completion of operation(T4) and extubation (T5). Results:In the 2 groups the values of LF, HF, LF/HF and LF+HF at T1-T4 were significantly lower than those at T0 (P0.05). In group Ⅱ,the indexes of HRV at T2-T5 were significantly lower than those in group Ⅰ(P