Anwulignan alleviates d-galactose induced renal damage by regulating Nrf2/ARE signaling pathway in mice.

Free radical accumulation in the body will cause oxidative stress damages including the renal damage. Schisandrae Sphenantherae Fructus (Schisandra), a traditional Chinese herbal medicine, has been used throughout the world. Anwulignan, a monomer extracted from Schisandra, has been shown in our previous studies to possess antioxidant and protective effects on the liver, brain and spleen damages in the aging mice. However, its effect on the renal damage caused by aging is not clear. This study showed that anwulignan could significantly increase the kidney index, the creatinine clearance, the activities of superoxide dismutase, catalase and glutathione peroxidase; reduce the urinary protein concentration, the serum urea nitrogen and creatinine content, the content of malondialdehyde and 8-hydroxylated deoxyguanosine in the renal tissue; and improve the renal tissue damage. Moreover, anwulignan increased the production of Nrf2, HO-1 and NQO1 proteins and decreased the production level of Keap1 protein in the renal tissue in the d-galactose induced aging mice. These results suggest that anwulignan significantly alleviates the renal damage by its antioxidant effect through regulating the production of Nrf2/ARE pathway-related proteins in the renal tissue in the d-galactose induced aging mice. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10068-021-00951-7.

Isolation and characterization of a polyurethane-degrading bacterium / 生物工程学报

Biodegradation of polyurethane (PUR) pollutants by microorganisms has received widespread attention currently. Identification of microorganisms capable of efficiently degrading PUR plastics is a key point. In this study, a strain P10 capable of degrading PUR was isolated from the plastic wastes, and identified as a bacterium belonging to the genus of Brevibacillus based on colony morphology and 16S rDNA phylogenetic analysis. Brevibacillus sp. P10 was capable of degrading 71.4% of waterborne polyurethane (Impranil DLN) after 6 days growth in MSM medium with DLN as a sole carbon source. In addition, strain P10 can use commercial PUR foam as the sole carbon source for growth. Brevibacillus sp. P10 can degrade 50 mg PUR foam after 6 days growth in MSM medium supplemented with 5% (V/V) LB after optimization of degradation conditions. This indicates that Brevibacillus sp. P10 has potential to be used in biodegradation of PUR waste.

The within-host viral kinetics of SARS-CoV-2

In this work, we use a within-host viral dynamic model to describe the SARS-CoV-2 kinetics in host. Chest radiograph score data are used to estimate the parameters of that model. Our result shows that the basic reproductive number of SARS-CoV-2 in host growth is around 3.79. Using the same method we also estimate the basic reproductive number of MERS virus is 8.16 which is higher than SARS-CoV-2. The PRCC method is used to analyze the sensitivities of model parameters and the drug effects on virus growth are also implemented to analyze the model.

Role of inflammasomes in skin tumors / 中华皮肤科杂志

Inflammasomes are a kind of intracellular multiprotein complex that comprises a part of the innate immune response. Inflammasome function abnormalities can lead to immune imbalance and have been linked to an increasing number of diseases. Researches have shown that inflammasomes are associated with some skin tumors including basal cell carcinoma, squamous cell carcinoma, Kaposi′s sarcoma and malignant melanoma, implicating that persistent inflammatory response and immune imbalance caused by abnormal activation of inflammasomes play a crucial role in tumor occurrence, development, invasion and metastasis. This review summarizes research advances in the role of inflammasomes in the pathogenesis of skin tumors.

Radiotherapy-related skin diseases / 中华皮肤科杂志

As an effective treatment method of tumors and other diseases,radiotherapy has been widely applied to clinical practices.After radiotherapy,about 95％ of patients suffer from skin injuries to different extents,including acute and/or chronic radiodermatitis,or radiotherapy-related skin diseases,including cutaneous fibrosis,morphea,sclerosing panniculitis,bullous skin diseases,eosinophilic polymorphic and pruritic eruption,lichen sclerosus et atrophicus,angiosarcoma,atypical vascular lesions and radiation recall dermatitis.These skin injuries greatly affect the quality of life and treatment compliance of patients.This review briefly summarizes common and rare skin diseases induced by radiotherapy,so as to improve the understanding of radiotherapy-related skin diseases in clinicians.

Autoinflammatory diseases accompanied by vasculitis / 中华皮肤科杂志

Autoinflammatory diseases are a group of inherited disorders characterized by dysregulation of the immune system,periodic fever and reccurrence of inflammation.The common rashes of autoinflammatory diseases include acne,pyoderma gangrenosum,erysipelas,urticaria,ichthyosis,pustulosis,while vasculitis is rare.This review summarizes autoinflammatory diseases accompanied by vasculitis.Familial Mediterranean fever mainly manifests as small-and medium-vessel vasculitis such as Henoch-Sch(o)nlein purpura and polyarteritis nodosa,while large-vessel vasculitis is common in Blau syndrome.Small-and medium-artery vasculitis can occur in patients with deficiency of adenosine deaminase 2 as well,so it should be differentiated from polyarteritis nodosa in clinical practice.Stimulator of interferon gene-associated vasculopathy with onset in infancy mainly presents as cutaneous small-vessel vasculitis and vasculopathy.

Comparison of Low-polarity Volatile Constituents in Supercritical CO2 Extract from the Roots and Stem of Ilex asprella and Its Effects on the Proliferation of IEC- 6 Cells / 中国药房

OBJECTIVE： To compare low-polarity volatile constituents in supercritical CO2 extract from the roots and stem of Ilex asprella and its effects on the proliferation of IEC-6 in vitro， and to provide reference for making full use of wild resources of I. asprella and expanding its medicinal parts. METHODS： The low-polarity volatile constituents were extracted from the root and stem of I. asprella with supercritical fluid CO2 extraction（SFE-CO2）. The chemical constituents were analyzed by GC-MS. IEC-6 cells were treated with different concentrations of supercritical CO2 extracts （0， 1， 5， 10， 20， 40， 60， 80， 100 μg/mL） from roots or stems of I. asprella. MTT assay was used to detect the relative viability， and cell proliferation curve was drawn and EC50 of each extract were calculated. RESULTS： Sixty-two and forty-six low-polarity volatile constituents were identified from supercritical CO2 extract in the roots and stem of I. asprella with GC-MS； there were 24 common constituents totally， mainly including pelargonic acid（14.18％ and 6.14％），octanoic acid（10.59％ and 4.35％），hexanoic acid（8.63％ and 10.86％），paeonol（7.79％ and 6.00％），2-methyl-3-phenyl-propanal（6.3％ and 0.58％），acetic acid（1.72％ and 33.77％） in root and stem， respectively. The results of cell culture in vitro showed that when the concentration of supercritical CO2 extract from the roots and stems of I. asprella was lower （≤60 μg/mL）， it could significantly promote the proliferation of IEC-6 cells and their EC50 were 16.35， 20.20 μg/mL， respectively； when the concentration of the extract was higher （≥80 μg/mL）， it showed cytotoxicity and inhibited the proliferation of IEC-6 cells. CONCLUSIONS： There are similar species of volatile constituents in roots and stems of I. asprella and similar in vitro bioactivity of the supercritical CO2 extracts to IEC-6 cells. The short-chain fatty acids may be the active ingredient to promote cell proliferation， while paeonol may be the cytotoxic active ingredient.

Expression characteristics of signaling molecules associated with innate immune response induced by HSV1 and HSV2 in respiratory and vaginal epithelial cells / 中华微生物学和免疫学杂志

Objective To investigate the influences of herpes simplex virus 1 and 2 ( HSV1 and HSV2) infection on the expression of signaling molecules associated with innate immune response in respira-tory and vaginal epithelial cells for bettering understanding of HSV infection and pathological characteristics in the primary infection site, namely mucosal epithelial tissues. Methods KMB17 and VK2 cells were in-fected with HSV. Changes in cell morphology and inner structure after HSV infection were observed under optical microscope and scanning electron microscope, respectively. Viral proliferation in KMB17 and VK2 cells was detected by plaque assay, microcytopathic assay and real-time quantitative PCR. Expression of sig-naling molecules associated with innate immune response in virus-infected KMB17 and VK2 cells were ana-lyzed by real-time quantitative PCR. Results Both HSV1 and HSV2 could infect KMB17 and VK2 cells, and cause damage to cell morphology and inner structure after 12 hours. Both of the two viruses formed simi-lar plaque on the single layer of KMB17 and VK2 cells, although HSV2 proliferated slower than HSV1. There were differences in the expression of signaling molecules associated with innate immune response in-duced by the two viruses in KMB17 and VK2 cells. Conclusion Both HSV1 and HSV2 could infect and proliferate in epithelial cells ( KMB17 and VK2 cells) . Although there were slight differences in viral prolif-eration between them, significant differences in the expression of signaling molecules associated with innate immune response induced by the two viruses were observed.

Autoimmune polyglandular syndrome type Ⅳ: thymoma, vitiligo, myasthenia gravis, systemic lupus erythematosus, pemphigus vulgaris and alopecia universalis successively occurred in a patient / 中华皮肤科杂志

On November 30th,2017,a 62-year-old female patient was admitted to the hospital because of multiple depigmented patches all over the body for 16 years,as well as erythema and blisters on the scalp,trunk and upper extremities for more than 8 years,which had been aggravated for 1 year.The patient underwent surgical resection of thymoma in 1996,and developed myasthenia gravis in 2004.Skin examination showed scattered erythemas of various sizes on the scalp,face,chest and upper extremities,with crusts on the surface of some erythemas and positive Nikolsky's sign.Hypopigmented macules mingled with depigmentated macules of various sizes were scattered all over the body.A large area of depigmentation was observed on both hands,and the nail plates were atrophic.Hairs,eyebrows,eyelashes,axillary and pubic hairs were abscent.Laboratory examination showed the presence of homogeneous IgG antinuclear antibody with a titer of 1:640,anti-double stranded DNA antibody (276 IU/ml),lupus anticoagulant (1.62),anti-Dsg1 antibody (＞ 150 U/ml) and anti-Dsg3 antibody (91 U/ml).Histopathological examination of dorsal blister tissues and hematoxylin-eosin staining showed fissured blisters and acantholytic cells in the epidermis,monolayer basal cells on the basilar membrane,and perivascular infiltration of a few lymphocytes in the superficial dermis.The patient successively developed thymoma,vitiligo,myasthenia gravis,systemic lupus erythematosus,pemphigus vulgaris and alopecia universalis,so a diagnosis of autoimmune polyglandular syndrome type Ⅳ was made.Since autoimmune-mediated endocrinopathies are prone to occur successively,changes of related hormones and antibodies in the patient should be monitored for early diagnosis and treatment of newly emerging autoimmune diseases.

Frontal fibrosing alopecia: two case reports / 中华皮肤科杂志

Two cases of frontal fibrosing alopecia (FFA) were reported.Case 1,a 44-year-old woman,presented with progressive recession of the frontotemporal hairline for 4 years and multiple skincolored facial papules for 2 years.Skin examination showed that the frontotemporal hairline was receded,the local skin was smooth and thin,and a few remaining fine hairs could be seen.Additionally,eyebrows,axillary and pubic hairs were partly shed,and plenty of millet-sized skin-colored papules were diffusedly distributed on the frontotemporal region and bilateral mandibular angles.Dermatoscopy showed reduced hair follicular openings,different hair shaft diameters,cicatricial white patches and perifollicular erythema.Case 2,a 55-year-old woman,presented with progressive frontotemporal hair loss for 2 years.Skin examination revealed the recession of bilateral frontotemporal hairline and partial loss of eyebrows,axillary and pubic hairs.Histopathological examinations of the 2 patients both revealed perifollicular infiltration of lymphocytes,liquefaction degeneration of basal cells and perifollicular lamellar fibrosis.Clinical manifestations and histopathological features of the 2 patients both confirmed the diagnosis of FFA.

GC-MS Analysis and Biological Activities in vitro of the Supercritical CO2 Extracts from the Roots of Poly-althia nemoralis / 中国药房

OBJECTIVE:To extract and identify the volatile components of the roots of Polyalthia nemoralis,and to evaluate its biological activity in vitro. METHODS:Supercritical CO2 extraction (SFE-CO2) was performed to extract volatile compounds from the roots of P. nemoralis,and the volatile components were separated and determined by GC-MS. Human hepatic cancer Huh-7 cells were cultured with 0(blank control),5,10,20,30,40 and 50 μg(medicinal material)/ml extract for 24 h,and then MTT assay was used to detect the inhibitory effect of the extracts on cells. Relative cell viability and IC50 were calculated. The an-ti-bacterial activities of extract to Staphylococcus aureus,Methicillin-resistant Staphylococcus aureus,Enterococcus faecalis and oth-er strain were determined by Kirby-bauer method and broth dilution method. RESULTS:Forty compounds were identified from the SFE-CO2 extracts from the roots of P. nemoralis. The main constituents were(Z,Z,Z)-9,12,15-octa-decatrien-1-ol,glycerin,cinna-maldehyde,n-hexadecanoic acid and eugenol. Compared with blank control group,SFE-CO2 extracts from the roots of P. nemoralis 5 μg(medicinal material)/ml and above showed significant inhibitory effect on cell growth(P<0.05),and the inhibitory effect was strengthened as the concentration of extracts increased,IC50 values was 5.2 μg(medicinal material)/ml. However,the supercritical extract didn't showed antibacterial activity against three microorganisms in 2 kinds of antibacterial tests. CONCLUSIONS:SFE-CO2 and GC-MS method can effectively extract and identify volatile components of the roots of P. nemoralis,and supercritical extracts can inhibit the viability of cells but have no antibacterial activity.

Expression, purification of recombinant cationic peptide AIK in Escherichia coli and its antitumor activity / 生物工程学报

AIK is a novel cationic peptide with potential antitumor activity. In order to construct the AIK expression vector by Gateway technology, and establish an optimal expression and purification method for recombinant AIK, a set of primers containing AttB sites were designed and used to create the AttB-TEV-FLAG-AIR fusion gene by overlapping PCR. The resulting fusion gene was cloned into the donor vector pDONR223 by attB and attP mediated recombination (BP reaction), then, transferred into the destination vector pDESTl 5 by attL and attR mediated recombination (LR reaction). All the cloning was verified by both colony PCR and DNA sequencing. The BL21 F. coli transformed by the GST-AIR expression plasmid was used to express the GST-AIK fusion protein with IPTG induction and the induction conditions were optimized. GST-AIR fusion protein was purified by glutathione magnetic beads, followed by rTEV cleavage to remove GST tag and MTS assay to test the growth inhibition activity of the recombinant AIR on human leukemia HL-60 cells. We found that a high level of soluble expression of GST-AIK protein (more than 30% out of the total bacterial proteins) was achieved upon 0.1 mmol/L ITPG induction for 4 h at 37 °C in the transformed BL21 F. coli with starting OD₆₀₀ at 1.0. Through GST affinity purification and rTEV cleavage, the purity of the resulting recombinant AIK was greater than 95%. And the MTS assays on HL-60 cells confirmed that the recombinant AIK retains an antitumor activity at a level similar to the chemically synthesized AIK. Taken together, we have established a method for expression and purification of recombinant AIK with a potent activity against tumor cells, which will be beneficial for the large-scale production and application of recombinant AIK in the future.

The discussion of the heat preservation performance monitoring of the blood transport case for daily use / 国际检验医学杂志

Objective To discuss the methods of the heat preservation performance monitoring of the blood transport case and to provide the technical support for the safety of blood transportation.Methods At the different environment temperature,the amount of the cold resource was decided by the mass ratio of cold resource to blood and the temperature was automatically recorded by the intelligent temperature chip continuously,to monitor the changes of each monitoring point in the blood transport case.Results When the mass ratio of cold resource to blood was fixed at 1∶6,the cold chain of the blood transport case could keep the tempera-ture of 2-10 ℃ for 8 hours at the environment temperature of 12 ℃,It could keep the temperature of 2-10 ℃ for 4.5 hours at the environment temperature of 25 ℃,and it could keep the temperature of 2-10 ℃ for 2 hours at the environment temperature of 44℃.Conclusion When the mass ratio of cold resource to blood is fixed,as the environment temperature changes,the available time that the blood transport case keeps with the cold-chain requirement varies according to the results of the heat preservation per-formance monitoring of the blood transport case.

Comparative analysis on results of different types of blood cell analyzer in blood stations / 国际检验医学杂志

Objective To investigate the consistency of the results detected by different types of blood cell analyzer in the blood center .Methods On the basis of the calibration in each analyzer ,with the analyzer obtaining the excellent result in participating the external laboratory quality assessment hosted by the Ministry of Health as the reference ,the fresh blood samples were adopted to analyze other analyzers .Results For the analyzers after conducting the comparison ,the consistency and accuracy of the detection results were ensured .Conclusion After calibration in different types of blood cell analyzer ,the differences exist in the detection re‐sults .Periodically conducting the comparison among different types of instrument has very practical significance .

Clinical value of rapid detection of plasma NT-proBNP levels on admission in patients with acute myocardial infarction / 中国基层医药

Objective To explore the clinical prognostic value of rapid detection for plasma NT-proBNP levels on admission in patients with acute myocardial infarction.Methods 56 patients with AMI were measured plasma NT-proBNP imediately in hospital,and then they were divided into A,B and C group according to NT-proBNP levels (A group:＜ 500ng/L,B group:500-2 000ng/L,C group:＞ 2 000ng/L).The incidence of major adverse cardiac events (MACE including congestive heart failure,malignant arrhythmia,cardiogenic shock and sudden cardiac death) in subjects were observed respectively during hospitalisation and 30 days.Results The three group subjects with different NT-proBNP levels presented different incidence of MACE(A group:1,0;B group:3,1;C group:8,6) at duration of hospital stay,30days (x2 =6.705,P =0.035 ; x2 =7.957,P =0.008).With the NT-proBNP levels rising in AMI paitents,the inciedence of MACE increased.The incidence of MACE in A,B and C group were 6.6％,18.18％ and 73.69％ respectively.Conclusion In AMI patients,plasma NT-proBNP levels could predict early MACE incidence,which has an important value to evaluate the early clinical prognosis.

"Opinions on a New Cross-discipline ""Biological Chemistry of Chinese Herbal Germplasm Resources""" / 世界科学技术-中医药现代化

Biological chemistry of Chinese herbal germplasm resources (BCCHGR) is a new cross-discipline formed from rapid development of modern science and technology and its application in the area of Chinese herbal resources. BCCHGR was defined as probing and understanding biological processes like heredity, gene transcription, expression and metabolism of Chinese herbal germplasm, at the interface of biochemistry, molecular biology and chemistry, elu-cidating the nature of Chinese herbal germplasm using as TCM medicine as well as the forming mechanism thereof. In this paper, the scientific background, definition, significance and contents of BCCHGR were discussed to depict a preliminary picture of BCCHGR and arouse popular consideration and discussions.

The clinical value of plasma NT-proBNP detection in evaluation of major adverse cardiac event in chronic heart failure patients during hospitalization / 中国基层医药

Objective To explore the clinical value of plasma NT-proBNP in evaluation of major adverse cardiac event in chronic heart failure patients.Methods 120 chronic heart failure patients who measured plasma NT-proBNP were divided into two groups according to median plasma NT-proBNP level (A group:≤ median,B group:＞ median).The incidence of major adverse cardiac events,MACE(including malignant ventricular arrhythmia and sudden cardiac death) were observed during hospitalization.Results The left ventricular end-diastolic diameters (LVEDDs) in B group was longer than that in A group [(58.80 ± 6.90) mm vs (54.32 ± 8.00) mm,P =0.035)],and the left ventricular ejection fraction(LYEF) in B group was lower than that in A group[(29.16 ± 8.31) ％ vs (33.80 ± 6.90)％,P =0.037].The incidence rate of major adverse cardiac events in A group was higher than that in B group (11.63％ vs 1.67 ％,P ＜ 0.05).The multivariate Logistic regression analysis showed that the NT-proBNP level in chronic heart failure inpatients was independently associated with major adverse cardiac event during hospitalization(OR =5.28,95％ confidence intervals 3.54 ～9.26,P＜0.05).Conclusion In chronic heart failure patients,plasma NT-proBNP level could predict the MACE incidence during hospitalization,and have important value to evaluate the prognosis of chronic heart failure.

The H syndrome / 中华皮肤科杂志

A case of the H syndrome was reported.An 18-year-old man presented with an 8-year history of progressive cutaneous sclerosis,skin hyperpigmentation,and hypertrichosis on the trunk and extremities.In addition,he suffered from short stature,hearing loss,cardiac anomaly,hepatosplenomegaly,and scrotal masses.Laboratory examination revealed hypogonadism.Cutaneous histopathologic examination showed hyperpigmentation of the basal layer with acanthosis,widespread fibrosis (moderate in dermis and severe in subcutis) and an infiltrate composed of histiocytes and plasma cells.A perivascular lymphocyte infiltrate was also observed throughout the dermis and subcutaneous fat tissue.These findings were consistent with the H syndrome.Differential diagnosis must be made with Winchester syndrome and polyneuropathy, organomegaly,endocrinopathy,M-protein and skin change (POEMS) syndrome.