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Coronaviruses such as SARS-CoV-2 regularly infect host tissues that express antiviral proteins (AVPs) in abundance. Understanding how they evolve to adapt or evade host immune responses is important in the effort to control the spread of COVID-19. Two AVPs that may shape viral genomes are the zinc finger antiviral protein (ZAP) and the apolipoprotein B mRNA-editing enzyme-catalytic polypeptide-like 3 protein (APOBEC3). The former binds to CpG dinucleotides to facilitate the degradation of viral transcripts while the latter deaminates C into U residues leading to dysfunctional transcripts. We tested the hypothesis that both APOBEC3 and ZAP may act as primary selective pressures that shape the genome of an infecting coronavirus by considering a comprehensive number of publicly available genomes for seven coronaviruses (SARS-CoV-2, SARS-CoV, MERS, Bovine CoV, Murine MHV, Porcine HEV, and Canine CoV). We show that coronaviruses that regularly infect tissues with abundant AVPs have CpG-deficient and U-rich genomes; whereas viruses that do not infect tissues with abundant AVPs do not share these sequence hallmarks. In SARS-CoV-2, CpG is most deficient in the S protein region to evaded ZAP-mediated antiviral defense during cell entry. Furthermore, over four months of SARS-CoV-2 evolutionary history, we observed a marked increase in C to U substitutions in the 5 UTR and ORF1ab regions. This suggests that the two regions could be under constant C to U deamination by APOBEC3. The evolutionary pressures exerted by host immune systems onto viral genomes may motivate novel strategies for SARS-CoV-2 vaccine development.
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<p><b>OBJECTIVE</b>To observe the impacts of the intervention with electric thermalstone and air suction cup on blood perfusion (BP) at meridian points and explore the approach of accurate measurement and regulation of meridianand blood balance in "precise acupuncture".</p><p><b>METHODS</b>The laser Doppler line scanner (LDLS) was used to measure BP at bilateraln-primary points at the pericardium meridian, the triple energizer meridian, the gallbladder meridian and the liver meridian (small cycle oftomeridians) at 31 healthy receptors. The bias ratio of blood perfusion (BPBR) deviated to the reference value was calculated. The electric thermalstone and air suction cup were used in the intervention at the-sea points of the affected meridians in which BPBR was relatively higher at the-primary points. The electric thermalstone therapy was used when BPBR was less than -30% and the air suction cupping therapy was used when BPBR was higher than 30%. BP was measured twice before intervention and it was measured separately at the moment after intervention and in 20 min after intervention. The means of BP before and after intervention and the change ratio of blood perfusion (BPCR) before intervention, at the moment after intervention and 20 min after intervention were calculated.</p><p><b>RESULTS</b>1. After the intervention of electric thermalstone, BP mean was increased from (103.51±41.21) PU to (121.97±56.22) PU (<0.05). Before intervention, at the moment after intervention and 20 min after intervention, separately, BRCR were (-0.58±16.18)%, (23.58±48.85) % and (25.62±65.89) %. BPCR at the moment after treatment was increased significantly as compared with that before intervention (<0.01). The difference was not significant in 20 min after intervention and before intervention (>0.05), but the change ratio was highly remained. 2. After intervention with air suction cup, BP mean was reduced from (194.83±81.14) PU to (173.88±88.26) PU. Before intervention, at the moment after intervention and 20 min after intervention, separately, BPCR were (7.62±30.49)%, (-12.12±18.20)% and (-14.35±21.25)%. BPCR at the moment after intervention and in 20 min after intervention were significantly different from that before intervention (both<0.01). .</p><p><b>CONCLUSION</b>The electric thermalstone increases the blood flow at the-primary point when acting on the-sea point of the same meridian. The influence of the air suction cup is opposite.</p>
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Objective To explore the damage of spiral ganglion neurons(SGNs),the protective effects of different dosages of healthy ear compound (HEC)from traditional Chinese medicine(TCM) against age-induced SGNs degeneration and its possible mechanism in spiral ganglion neurons(SGNs)of C57BL/6J mice.Methods Totally 36 C57BL/6J mice just after ablactation were randomly divided into four groups.Normal control group (n =6)drank tap water daily from ablactation to 2 months old.Ageing-related SGNs apoptosis control group(n=12)drank tap water daily from ablactation to 7 months old.High dose TCM group(n=12)at drank 3.65 g/kg/d of HEC from ablactation to 7 months old.Low dose TCM group(n=6)drank 0.91 g/kg/d of HEC from ablactation to 7 months old.The animal cochleae were immediately removed at the termination of the experiment.In each group,the cochleae of 6 animals were used for paraffin embedding,slicing and toluidine blue staining to observe neuronal morphological changes.The caspase-3 mRNA expression study was performed by real-time PCR technique in 6 cochleae of High dose TCM group and ageing-related SGNs apoptosis control group.Results The morphological structure of cochlear SGNs represented healthy and normal density in normal control group at 2 months old.In contrast,amount or density of SGNs in cochlear basilar part was significantly damaged and reduced in ageing-related SGNs apoptosis control group at 7 months old(P< 0.001).But the high dose TCM group at 7 months of age was similar to the normal control group at 2 months old in morphological structure,amount or density of SGNs(P>0.05).The low dose TCM group was significantly different from other 3 groups in amount or density of SGNs (P<0.001).However,SGNs in the middle part and apical part showed integrity in each group.In addition,the expression level of caspase-3 in the cochlea of high dose TCM group was also obviously different with age-related SGNs apoptosis control group(P<0.01) Conclusions Ageing-related damage of SGNs in C57BL/6J mice begins from the base of cochlea and progresses towards the apex.The HEC of TCM could significantly protect SGNs against age-induced apoptosis in SGNs.The efficacy of the high dose TCM is better than that of the low dose TCM.Its SGNs protective mechanisms might be related to involving the caspase-mediated cell apoptotic pathway.
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Objective To investigate the MR findings of fetal cleft lip (CL) and evaluate the advantages and limitations of MRI in the diagnosis. Methods Twelve pregnant women suspicious of fetal CL/cleft palate(CP) on ultrasonography were enrolled in the study. The findings of ultrasonography, MRI and following-up were compared. Results MRI and ultrasonography detected 12 fetuses with CL/CP. The following-up results showed 1 case with incomplete cleft lip and the other 11 cases with complete cleft lips and cleft palates. MRI and unltrasonography were consistent with the follow-up in CL detection, showing completed or uncompleted soft tissue interruption of the fetal lips with amniotic fluid filling which is high signal on T_2WI. On MRI, CP showed discontinuous of the soft tissue which were interrupted by long T_2 signal and communicating with oral cavity and nasal cavity. MRI missed 1 case and excluded 1 case of CP. Ultrasonography predicted 5 case of CL, excluded 1 CP but missed 6 cases. The accuracy, sensitivity and specificity in detection CL/CP was 91.7% (11/12), 90.9% (10/11), 100% (1/1) for MRI and 50.0% (6/12),45.5% (5/11), 100% (1/1) for ultrasonography, respectively. Conclusion MR imaging had advantage over ultrasonography in detecting CP, MRI is an essential when CP is suspicious on ultrasonography.
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In order to make a report on 90 cases of insomnia treated by the Wei-defensive qi-regulating and brain-strengthening needling technique,as a clinical subject of the multiple center,for assessing the preliminary standardized indications and operating methods and making an initial summary for writing the draft of the technique operation.Methods:By ratio of 1:1,the patients in conformity with the criteria were randomly divided into the experimental group and control group.In the experimental group,45 cases were treated with the Wei-defensive qi-regulating and brain-strengthening needling technique on Baihui (GV 20),Dazhui(GV 14),Shenmai(BL 62),Zhaohai(KI 6),plus ear points.In the control group,45 cases were treated with routine acupuncture on Sishencong(Ex-HN 1),Shenmen (HT 7),Sanyinjiao(SP 6),etc.The therapeutic effects in the two groups were observed and assessed in comparison.Results:The results showed cure in 15 cases.remarkable effect in 27 cases,effect in 42 cases,failure in 6 cases,and the total eriective rate in 94.4% in 90 cases of insomnia.In the three centers,the statistic management was performed based upon PSQI integral and showed significant difference(P<0.01),and no significant difference among various groups(P>0.01).Conclusion:The therapeutic effect in the treatment of insomnia by Wei-defensive qi-regulating and brain-strengthening needling technique is better than the control group and the therapeutic effect and methods in various centers are stable.without any deviation.