CD147 antibody specifically and effectively inhibits infection and cytokine storm of SARS-CoV-2 variants

SARS-CoV-2 and its variants are raging worldwide. Unfortunately, the global vaccination is not efficient enough to attain a vaccine-based herd-immunity and yet no special and effective drug is developed to contain the spread of the disease. Previously we have identified CD147 as a novel receptor for SARS-CoV-2 infection. Here, we demonstrated that CD147 antibody effectively inhibits infection and cytokine storm caused by SARS-CoV-2 variants. In CD147KO VeroE6 cells, infections of SARS-CoV-2, its variants (B.1.1.7, B.1.351) and pseudovirus mutants (B.1.1.7, B.1.351, B.1.525, B.1.526 (S477N), B.1.526 (E484K), P.1, P.2, B.1.617.1, B.1.617.2) were decreased. Meanwhile, CD147 antibody effectively blocked the entry of variants and pseudomutants in VeroE6 cells, and inhibited the expression of cytokines. A model of SARS-CoV-2-infected hCD147 transgenic mice was constructed, which recapitulated the features of exudative diffuse alveolar damage and dynamic immune responses of COVID-19. CD147 antibody could effectively clear the virus and alveolar exudation, resolving the pneumonia. We found the elevated level of cyclophilin A (CyPA) in plasma of severe/critical cases, and identified CyPA as the most important proinflammatory intermediate causing cytokine storm. Mechanistically, spike protein of SARS-CoV-2 bound to CD147 and initiated the JAK-STAT pathway, which induced expression of CyPA. CyPA reciprocally bound to CD147, triggered MAPK pathway and consequently mediated the expression of cytokine and chemokine. In conclusion, CD147 is a critical target for SARS-CoV-2 variants and CD147 antibody is a promising drug to control the new wave of COVID-19 epidemic.

Effects of narrow-band ultraviolet B on levels of plasmin and CC chemokine ligand 20 in peripheral blood of patients with psoriasis vulgaris / 中华皮肤科杂志

Objective To investigate the effects of narrow-band ultraviolet B (NB-UVB) therapy on the levels of plasmin and CC chemokine ligand 20 (CCL20) in peripheral blood of patients with psoriasis vulgaris.Methods A total of 60 patients with psoriasis vulgaris in progressive stage were treated with NB-UVB radiation thrice a week for 8 weeks.Enzyme-linked immunosorbent assay (ELISA) was performed to detect the levels of plasmin and CCL20 in the peripheral blood of the patients before and after the treatment,as well as in the peripheral blood of 50 healthy controls.Results After the treatment,psoriasis area and severity index (PASI) scores in patients were significantly decreased compared with those before the treatment (2.54 ± 1.64 vs.10.26 ± 3.14,t =17.40,P ＜ 0.05),and the response rate was up to 87％ (52/60).Before the treatment,levels of plasmin and CCL20 were both significantly higher in the patient group than in the control group (plasmin:180.07 ± 40.62 μg/L vs.76.30 ± 26.92 μg/L,t =15.45,P ＜ 0.05;CCL20:422.41 ± 129.87 pg/L vs.205.33 ± 49.89 pg/L,t =11.15,P ＜ 0.05).After the treatment,levels of plasmin (148.22 ± 40.05 μg/L) and CCL20 (329.67 ± 100.73 pg/L) in patients were significantly decreased compared with those before the treatment (t =4.97,6.44,P ＜ 0.05),but still significantly higher than those in controls (t =10.82,7.95,P ＜ 0.05).Before the treatment,the level of plasmin was positively correlated with the level of CCL20 in peripheral blood of the patients (r =0.57,P ＜ 0.05),and the levels of plasmin and CCL20 were both positively correlated with the PASI score (r =0.49,0.62,respectively,both P ＜ 0.05).Conclusion NB-UVB radiation may exert a therapeutic effect on psoriasis vulgaris by reducing levels of plasmin and CCL20 in peripheral blood of patients.

Clinical and Experimental Study on Prevention and Treatment of Depression by Using Gan Mai Dazao De-coction / 中国药师

Depression is a common psychiatric disorder characterized by emotional and depressive symptoms. At present, western medicine treatment time is longer, having certain side effects, the treatment is incomplete and easy to recur, and not suitable for preg-nant women and the elderly and other special populations. The Chinese ancient"hysteria" Gan Mai Datzao decoction was used for the modern treatment of depression and achieved better effect. This article attempts from the clinical application and pharmacological stud-ies, for the past ten years of Gan Mai Dazao decoction decoction to prevent depression in the systematic review and analysis, the rea-sonable use of clinical thought to provide reference.

Clinical and Experimental Study on Prevention and Treatment of Depression by Using Gan Mai Dazao De-coction / 中国药师

Depression is a common psychiatric disorder characterized by emotional and depressive symptoms. At present, western medicine treatment time is longer, having certain side effects, the treatment is incomplete and easy to recur, and not suitable for preg-nant women and the elderly and other special populations. The Chinese ancient"hysteria" Gan Mai Datzao decoction was used for the modern treatment of depression and achieved better effect. This article attempts from the clinical application and pharmacological stud-ies, for the past ten years of Gan Mai Dazao decoction decoction to prevent depression in the systematic review and analysis, the rea-sonable use of clinical thought to provide reference.

Cultivation of medical students’ clinical English speaking ability under the framework of the first principles of instruction / 中华医学教育探索杂志

The progress of globalization and frequent international exchanges in the medical com-munity demand doctors' improved English speaking competence, particularly in the clinical aspect. On the basis of the First Principles of Instruction, the research has proposed a module-based teaching model, which integrates 7 modules, including history taking, questions about frequency and pains, analysis of the possible causes, initial check-up, giving prescription, further investigation and conditional advice. The model is cen-tered on linguistic functions and aimed at helping students become proficient in speaking medically through the phrases of demonstration, application, reflection and activation. The model, after two years suc-cessive teaching practice among the elite class undergraduates, received a favorable feedback in triggering interests, classroom arrangement, material selection, and its compliance with FLA (foreign language acquisition), and was proved to be an effective way to improve medical students' English speaking ability in handling clinical dialogues.

An imaging study on effect of total artificial disc replacement on lumbar sagittal alignment / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate effect of Activ L total lumbar disc replacement on lumbar sagittal alignment.</p><p><b>METHODS</b>The imaging data of patients with degenerative disc disease received Activ L total lumbar disc replacement at Department of Orthopedics, Beijing Chao-Yang Hospital, Capital Medical University from March 2009 to March 2013 were retrospectively analyzed. The average age was 45.6 years(range, 35-60 years)and the surgery levels were as follows: L3-4 2 cases, L4-5 15 cases, L5/S1 5 cases, L3-4+ L4-5 3 cases, L4-5+ L5/S1 7 cases. All patients were followed up for 15 to 63 months(average, 32 months). Radiographic parameters such as lumbar lordosis angle(LL), segment lordosis angle(SL) and sacral slope angle(SS) were recorded. All the radiographic parameters were compared using one-way ANOVA at different stage. Lumbar lordosis angle of the two-level was compared with the one of one-level by using independent sample t-test before and after the operation. A partial correction test was carried out to determine the corrections between the parameters preoperatively, one month after the operation and at final follow-up.</p><p><b>RESULTS</b>One month after the operation, the lumbar lordosis angle decreased by an average of 1.8°, but there was no statistically significant(P>0.05). Compared with one month postoperation, the lumbar lordosis angle increased by an average of 6.8°(P<0.05), which also increased a lot compared with preoperation(P<0.05). The value of segment lordosis angle was rising up from preoperation to the final follow-up(P<0.05), so was the value of sacral slope angle, but there was no statistically significant between different stage(P>0.05). The lumbar lordosis angle showed no significant difference between double-level ones and single-level ones at different stage(P<0.05). The lumbar lordosis angle showed positive correlation with the sacral slope(P<0.001), however, the lumbar lordosis angle showed no corrected with the segment angle all the time(P>0.05).</p><p><b>CONCLUSIONS</b>The total lumbar disc replacement with Activ L prosthesis had contributed to maintain and improve the lumbar alignment in the short and medium term. Double- or single-level total lumbar disc replacement had no significant effect on the value of lumbar lordosis angle. The lumbar lordosis angle showed positive correlation with the sacral slope all the time with no correlation between lumbar lordosis angle and sacral slope.</p>

The correlation between wide QRS of transesophageal atrial pacing and implicit ventricular pre-excitation / 中国基层医药

Objective To explore the correlation between wide QRS of transesophageal atrial pacing (TEAP) and implicit ventricular pre-excitation.Methods 77 patients tested by TEAP were divided into two groups according to the ECG results .45 patients in group Ⅰhad normal electrocardiogram .32 patients in group Ⅱhad ven-tricular pre-excitation.In group Ⅰ,TEAP results showed that electric pulse wave (S wave) was followed by intermit-tent or continuous wide QRS complex .At the same time , the results of group Ⅰ were compared with the results of groupⅡ.Results (1)The patients of group Ⅰwere excluded the presence of concealed accessory pathway by intra-cavitary electrocardiographic test,among them 20 patients (group ⅠA) were ventricular pacing,the test results dis-played that S wave was followed by wide QRS complex exhibiting a pattern of right bundle branch block ( RBBB) ,SR interval was 0 s;SR intervals of 25 patients (groupⅠB) were not fixed,SR interval was (0.07 ±0.01)s,S wave had no concern with QRS wave ,the wide QRS complex was premature ventricular contraction ,QRS wave shapes were dif-ferent according to the different sites of pacing origin .(2)In groupⅡ,the test results displayed that S wave was close-ly followed by the atrial depolarization wave P ,and there was a wide QRS complex with pre-excitation wave at the be-ginning after a atrioventricular conduction time shorter than normal ,SR interval was fixed ,SR interval was (0.08 ±0. 03)s,at the same time,different parts of accessory pathway QRS complex had different morphological characteristics . (3) SR interval of ⅠA group compared with groupⅠB and groupⅡ,the differences were statistically significant ( t=2.97,3.02,all P0.05).Conclusion When TEAP displaying pacing wide QRS complex ,in order to avoid bringing misdiag-nosis,TEAP results should be analyzed comprehensively rather than blindly believing that the reason was concealed accessory pathway .

Analysis of RR-Lorenz Plot in Patients of Sinus Rhythm With Long RR Interval / 中国循环杂志

Objective: To explore the advantage of RR-Lorenz plot (RR-LP) in analyzing the patients of sinus rhythm with long RR interval. Methods: A total of 308 RR-LP patients with long RR interval were retrospectively studied. The patients were divided into 7 groups according to the type of long RR intervals. ① Sinus bradycardia with arrhythmia group, n=63,②Repeated transient sinus arrest group, n=16, ③Ⅱ° sino-atrial block group, n=14, ④Ⅱ° atrial ventricular block (Ⅱ° AVB) group, n=47, ⑤ Un-passed atrial premature beats (APB) group, n=28, ⑥ Atrial premature beats group, n=72 and ⑦ Premature ventricular beats group, n=68. We analyzed the patients of RR interval greater than 1500 ms with ambulatory electrocardiogram record. Results: ①RR-LP of sinus bradycardia with arrhythmia group showed a single distributing area with 1500 ms for the origin of transverse and longitudinal axis with B line slope at 1, tilt angle of 45°.②RR-LP of repeated transient sinus arrest,Ⅱ° sino-atrial block,Ⅱ° AVB and APB groups showed special four distributing areas with B line slope at (0.51 ± 0.01), tilt angle of (23.04 ± 0.50) °, B line slope at 0.6, tilt angle of (27°), B line slope at (0.57 ± 0.21), tilt angle of (25.69 ± 9.59)° and B line slope at (0.50 ± 0.01), tilt angle of (22.59 ± 0.54) ° respectively.③RR-LP of premature beats groups showed special four regional distributing areas, B line slope for atrial premature beats was at (0.38 ± 0.12), tilt angle of (17.06 ± 5.22) ° and B line slope for ventricular premature beats was at (0.07 ± 0.05), tilt angle of (3.02 ± 2.39) °. Conclusion: RR-LP in patients of sinus rhythm with long RR interval had speciifc morphology and distribution features, the local abnormality could be found in a plane via all RR intervals which provided a differential diagnosis for repeated occurrence of short RR interval.

The clinical value of pretreatment using estradiol valerate and mifepristone before the curettage of the late small missed abortion / 中国综合临床

Objective To explore the clinical value of preparatory treatment using estradiol valerate and mifepristone before the curettage of the late small missed abortion.Methods One hundred and twenty patients with late small missed abortion were randomly divided into two groups:pretreated group(n =660) and control group(n =60).Women in the pretreated group were given 5 mg of Estradiol Valerate 3 times/day and 25 mg of Mifepristone twice/day for 3 days each before conducted curettage on the fourth day.While for the control group,curettage was done directly.The condition of operation and the occurrence of short-and long-term complications were compared between the two groups.Results Compared with the control group,the pretreated group had a significant shorter operation duration[(8.6±2.7) rnin vs.(10.5±3.4) min,t =3.390,P =0.001]and less blood lose during operation[(47.5±18.3) ml vs.(61.8±20.5) ml,t =4.031,P ＜ 0.001].In terms of complications,the rates of incomplete curettage[(0 vs 13.3％,x2 =6.563,P =0.010],artificial abortion syndrome(3.3 ％ vs 15.0％,x2 =4.904,P =0.027),the cervical canal adhesion/Asherman' s syndrome(0 vs 11.7％,x2 =5.461,P =0.019),and the vaginal bleeding duration[(7.5±2.7) days vs(8.7±3.4) days,t =2.141,P =0.034]in the pretreated group were significantly lower than those in the control group.The average recovery time of menstruation after operation in the pretreated patients was significantly shorter than that in the control group[(30.5±9.3) days vs.(35.5±7.4) days,t =3.259,P =0.002].Contusion Estradiol valerate and Mifepristone as a preparatory treatment before the operation can help reduce the occurrence of complications and side effects in the late small missed abortion curettage and is helpful for the patients' recovery,thus worth wide clinical application.

Effect of Ghrelin on nuclear factor-κB and tumor necrosis factor-α in the cerebral cortex of immature rats with pilocarpine-induced epilepsy / 中国小儿急救医学

Objective To explore the changes of gene and protein expressions of nuclear factor-κB(NF-κB) and tumor necrosis factor-α (TNF-α) in immature rats with pilocarpine-induced epilepsy treated with ghrelin. Methods The pllocarpine-induced epilepsy model in immatured rats were built, then the rats were divided into three groups: Ghrelin-treated group, saline-treated group and model group, meanwhile the normal control group was set. The NF-κB and TNF-α levels of gene and protein in the cerebral cortex of immature rats were detected. Results The expression levels of gene and protein of NF-κB and TNF-α were increased in model group,but decreased in the normal control group;NF-κB and TNF-α levels in Ghrelin treated group were obviously lower than those of saline-treated group and model group(P < 0. 05). Conclusion The protective mechanism of Ghrelin for nerve cell is cutting down the expressions of NF-κB and TNF-α in the cerebral cortex of immature rats with epilepsy and lessening inflammatory reaction in neurocytes.

MAR increased transgene expression in stable transfected CHO cells / 基础医学与临床

Objective To study the effect of human ?-globin matrix attachment region(MAR) on transgene expression in stably transfected CHO cells.Methods Expression vector was constructed,which contained the ?-globin MAR in both sides of Chloramphenicol acetyltransferase(CAT) reporter gene expression cassette in cis,then transfected into CHO cells.The CAT reporter gene expression was analyzed by ELISA method.Results The ?-globin MAR enhanced the CAT gene expression 5.5-fold in stably transformed CHO cells,while the transgene expression variation among individuals of transformants was decreased.Conclusion MAR increase transgene expression in stably transfected CHO cells.

Evaluation of the efficacy of polysaccharide sulfate in treating patients with cold erythema multiforme / 中国海洋药物

Objective To observe the efficacy and safety of polysaccharide sulfate in treating patients with cold erythema multiforme.Methods Using polysaccharide sulfate,cetirizine and compound vitamin E ointment to treat 20 patients with cold erythema multiforme as the treatment group compared with the control group in which 20 patients with cold erythema multiforme were given cetirizine and compound vitamin E ointment.The course of treatment in 2 groups was 14 d.Results Forty patients were eligible for efficacy analysis(20 in each group).The total significant recovery rate was 95% for treatment group and 70% for control group,respectively;the therapeutic effects of the treatment group were better than those of the control group(P

Therapeutic observastion of the Combination of Concha meretricis Seu Cyclinae powder with furacilin solution in the treatment of dermatitis vulvae and eczema / 中国海洋药物

OBJECTIVE: To observe therapeutic effect and adverse reaction of the combination of Concha merelricis Seu cyclinae powder with 0. 02% furacilin solution in treating dermatitis vulvae and eczema. METHODS: Thirty outpatients (9 men and 21 women with the average age of 47. 1 years old) were treated with Concha meretricis Seu cyclinae powder and 0. 02% furacilin solution by wet dressing or external use twice daily for three weeks. RESULTS: 21 cases were cured (70%); 6 cases were significant recovery (20%); 2 cases were effective (6. 66%) and 1 cases was ineffective (3. 33%), The total effective rate was 90. 0% and no adverse reaction was found. CONCLUSIONS: Concha meretricis Seu cyclinae powder combined with 0. 02% furacilin solution is one of the effective therapy in the treatment of dermatitis vulvae and eczema.