1.Clinical characterization and prediction modeling of lung cancer patients with high energy metabolism
Jiang-Shan REN ; Jun-Mei JIA ; Ping SUN ; Mei PING ; Qiong-Qiong ZHANG ; Yan-Yan LIU ; He-Ping ZHAO ; Yan CHEN ; Dong-Wen RONG ; Kang WANG ; Hai-Le QIU ; Chen-An LIU ; Yu-Yu FAN ; De-Gang YU
Medical Journal of Chinese People's Liberation Army 2024;49(9):1004-1010
		                        		
		                        			
		                        			Objective To analyze the clinical characteristics of high energy metabolism in lung cancer patients and its correlation with body composition,nutritional status,and quality of life,and to develop a corresponding risk prediction model.Methods Retrospectively analyzed 132 primary lung cancer patients admitted to the First Hospital of Shanxi Medical University from January 2022 to May 2023,and categorized into high(n=94)and low energy metabolism group(n=38)based on their metabolic status.Differences in clinical data,body composition,Patient Generated Subjective Global Assessment(PG-SGA)scores,and European Organization for Research and treatment of Cancer(EORTC)Quality of Life Questionnaire-Core 30(QLQ-C30)scores were compared between the two groups.Logistic regression was used to identify the risk factors for high energy metabolism in lung cancer patients,and a risk prediction model was established accordingly;the Hosmer-Lemeshow test was used to assess the model fit,and the ROC curve was used to test the predictive efficacy of the model.Results Of the 132 patients with primary lung cancer,94(71.2%)exhibited high energy metabolism.Compared with low energy metabolism group,patients in high-energy metabolism group had a smoking index of 400 or higher,advanced disease staging of stage Ⅲ or Ⅳ,and higher levels of IL-6 level,low adiposity index,low skeletal muscle index,and malnutrition(P<0.05),and lower levels of total protein,albumin,hemoglobin level,and prognostic nutritional index(PNI)(P<0.05).There was no significant difference in age,gender,height,weight,BMI and disease type between the two groups(P>0.05).Logistic regression analysis showed that smoking index≥400,advanced disease stage,IL-6≥3.775 ng/L,and PNI<46.43 were independent risk factors for high energy metabolism in lung cancer patients.The AUC of the ROC curve for the established prediction model of high energy metabolism in lung cancer patients was 0.834(95%CI 0.763-0.904).Conclusion The high energy metabolic risk prediction model of lung cancer patients established in this study has good fit and prediction efficiency.
		                        		
		                        		
		                        		
		                        	
2.Research progress of Shegan Mahuang Decoction and predictive analysis on its Q-markers.
Qiu-Hui LI ; Xiao-Xiao SHAN ; Wei-Dong YE ; Xun-Yan YIN ; Ya-Mei YUAN ; Xiang-Ming FANG
China Journal of Chinese Materia Medica 2023;48(8):2068-2076
		                        		
		                        			
		                        			Shegan Mahuang Decoction has been used in clinical practice for thousands of years, and is a classical formula for treating asthma and other respiratory diseases, with the effects of ventilating lung, dispersing cold, and relieving cough and asthma. This paper summarized the history, clinical application and mechanism of Shegan Mahuang Decoction, and predicted its quality markers(Q-markers) based on the "five principles" of Q-markers. The results suggested that irisflorentin, tectoridin, tectorigenin, irigenin, ephedrine, pseudoephedrine, asarinin, methyleugenol, shionone, epifriedelanol, tussilagone, 6-gingerol, trigonelline, cavidine, schizandrin, and schizandrin B could be used as Q-markers of Shegan Mahuang Decoction, which provided a basis for the quality control and subsequent research and development of Shegan Mahuang Decoction.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Ephedra sinica
		                        			;
		                        		
		                        			Drugs, Chinese Herbal/pharmacology*
		                        			;
		                        		
		                        			Asthma/drug therapy*
		                        			;
		                        		
		                        			Lung
		                        			;
		                        		
		                        			Cough/drug therapy*
		                        			
		                        		
		                        	
3.Short-term efficacy of empagliflozin in children with glycogen storage disease type Ⅰb.
Jing Jing JIANG ; Xin ZHENG ; Ming Sheng MA ; Xing Ge CUI ; Shan JIAN ; Xiao Yan TANG ; Xu Dong BAO ; Si Min ZHANG ; Jing Ran MA ; Hong Mei SONG ; Zheng Qing QIU
Chinese Journal of Pediatrics 2023;61(6):515-519
		                        		
		                        			
		                        			Objective: To analyze the short-time efficacy of empagliflozin in the treatment of glycogen storage disease type Ⅰb (GSD Ⅰb). Methods: In this prospective open-label single-arm study, the data of 4 patients were collected from the pediatric department in Peking Union Medical College Hospital from December 2020 to December 2022. All of them were diagnosed by gene sequencing and had neutropenia. These patients received empagliflozin treatment. Their clinical symptoms such as height and weight increase, abdominal pain, diarrhea, oral ulcer, infection times, and drug applications were recorded at 2 weeks, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months, and 15 months after treatment to assess the therapeutic effect. The liquid chromatography-tandem mass spectrometry method was used to monitor the changes in 1, 5-anhydroglucitol (1, 5AG) concentration in plasma. At the same time, adverse reactions such as hypoglycemia and urinary tract infection were closely followed up and monitored. Results: The 4 patients with GSD Ⅰb were 15, 14, 4 and 14 years old, respectively at the beginning of empagliflozin treatment, and were followed up for 15, 15, 12 and 6 months, respectively. Maintenance dose range of empagliflozin was 0.24-0.39 mg/(kg·d). The frequency of diarrhea and abdominal pain decreased in cases 2, 3, and 4 at 1, 2 and 3 months of treatment, respectively. Their height and weight increased at different degrees.The absolute count of neutrophils increased from 0.84×109, 0.50×109, 0.48×109, 0.48×109/L to 1.48×109, 3.04×109, 1.10×109, 0.73×109/L, respectively. Granulocyte colony-stimulating factor was gradually reduced in 1 patients and stopped in 3 patient. Plasma 1, 5 AG levels in 2 children were significantly decreased after administration of empagliflozin (from 46.3 mg/L to 9.6 mg/L in case 2, and from 56.1 mg/L to 15.0 mg/L in case 3). All 4 patients had no adverse reactions such as hypoglycemia, abnormal liver or kidney function, or urinary system infection. Conclusion: In short-term observation, empagliflozin can improve the symptoms of GSD Ⅰb oral ulcers, abdominal pain, diarrhea, and recurrent infection, also can alleviate neutropenia and decrease 1, 5AG concentration in plasma, with favorable safety.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Child
		                        			;
		                        		
		                        			Child, Preschool
		                        			;
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Prospective Studies
		                        			;
		                        		
		                        			Glycogen Storage Disease Type I/drug therapy*
		                        			;
		                        		
		                        			Neutropenia
		                        			;
		                        		
		                        			Abdominal Pain
		                        			;
		                        		
		                        			Diarrhea/drug therapy*
		                        			;
		                        		
		                        			Hypoglycemia
		                        			
		                        		
		                        	
4.Epidemiological characteristics of a 2019-nCoV outbreak caused by Omicron variant BF.7 in Shenzhen.
Yan Peng CHENG ; Dong Feng KONG ; Jia ZHANG ; Zi Quan LYU ; Zhi Gao CHEN ; Hua Wei XIONG ; Yan LU ; Qing Shan LUO ; Qiu Ying LYU ; Jin ZHAO ; Ying WEN ; Jia WAN ; Fang Fang LU ; Jian Hua LU ; Xuan ZOU ; Zhen ZHANG
Chinese Journal of Epidemiology 2023;44(3):379-385
		                        		
		                        			
		                        			Objective: To explore the epidemiological characteristic of a COVID-19 outbreak caused by 2019-nCoV Omicron variant BF.7 and other provinces imported in Shenzhen and analyze transmission chains and characteristics. Methods: Field epidemiological survey was conducted to identify the transmission chain, analyze the generation relationship among the cases. The 2019-nCoV nucleic acid positive samples were used for gene sequencing. Results: From 8 to 23 October, 2022, a total of 196 cases of COVID-19 were reported in Shenzhen, all the cases had epidemiological links. In the cases, 100 were men and 96 were women, with a median of age, M (Q1, Q3) was 33(25, 46) years. The outbreak was caused by traverlers initial cases infected with 2019-nCoV who returned to Shenzhen after traveling outside of Guangdong Province.There were four transmission chains, including the transmission in place of residence and neighbourhood, affecting 8 persons, transmission in social activity in the evening on 7 October, affecting 65 persons, transmission in work place on 8 October, affecting 48 persons, and transmission in a building near the work place, affecting 74 persons. The median of the incubation period of the infection, M (Q1, Q3) was 1.44 (1.11, 2.17) days. The incubation period of indoor exposure less than that of the outdoor exposure, M (Q1, Q3) was 1.38 (1.06, 1.84) and 1.95 (1.22, 2.99) days, respcetively (Wald χ2=10.27, P=0.001). With the increase of case generation, the number and probability of gene mutation increased. In the same transmission chain, the proportion of having 1-3 mutation sites was high in the cases in the first generation. Conclusions: The transmission chains were clear in this epidemic. The incubation period of Omicron variant BF.7 infection was shorter, the transmission speed was faster, and the gene mutation rate was higher. It is necessary to conduct prompt response and strict disease control when epidemic occurs.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			SARS-CoV-2
		                        			;
		                        		
		                        			COVID-19/epidemiology*
		                        			;
		                        		
		                        			Disease Outbreaks
		                        			;
		                        		
		                        			Epidemics
		                        			;
		                        		
		                        			China/epidemiology*
		                        			
		                        		
		                        	
5.Improvement effect of Shegan Mahuang Decoction on rats with cold-induced asthma based on TRPV1/NRF-1/mtTFA pathway.
Qiu-Hui LI ; Xiao-Xiao SHAN ; Xiao-Ying LIU ; Wei-Dong YE ; Ya-Mei YUAN ; Xun-Yan YIN ; Xiang-Ming FANG
China Journal of Chinese Materia Medica 2023;48(23):6414-6422
		                        		
		                        			
		                        			This study investigated the therapeutic effect of Shegan Mahuang Decoction(SGMHD) on cold-induced asthma in rats and explored its underlying mechanism. Seventy-two healthy male SD rats of specific pathogen free(SPF) grade were randomly divided into a blank group, a model group, a positive control group(dexamethasone, 0.4 mg·kg~(-1)), and low-, medium-, and high-dose SGMHD groups(3.2, 6.4, and 12.8 g·kg~(-1)). The blank group received saline, while the other groups were sensitized by intraperitoneal injection of ovalbumin(OVA) solution. Subsequently, the rats were placed in a cold chamber adjustable to 0-2 ℃, and OVA solution was ultrasonically nebulized to induce cold-induced asthma in rats. After three weeks of treatment, the general behaviors of rats were observed. Hematoxylin-eosin(HE) staining was used to evaluate pathological changes in lung tissues, periodic acid-Schiff(PAS) staining assessed mucin changes, and Masson staining was performed to examine collagen deposition. Enzyme-linked immunosorbent assay(ELISA) was used to measure the levels of the inflammatory factors interleukin-4(IL-4) and vascular endothelial growth factor(VEGF) in serum and bronchoalveolar lavage fluid(BALF). Real-time quantitative polymerase chain reaction(RT-PCR) was employed to assess the mRNA expression levels of transient receptor potential vanilloid subfamily member 1(TRPV1), nuclear respiratory factor 1(NRF-1), and mitochondrial transcription factor A(mtTFA) in lung tissues. Western blot was used to measure the protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues. Compared with the blank group, the model group exhibited signs of rapid respiration, increased frequency of defecation with looser stools, and disheveled and dull fur. Pathological results showed significant infiltration of inflammatory cells in lung tissues, narrowing of bronchial lumens, increased mucin secretion, and enhanced collagen deposition in the model group. Additionally, the levels of IL-4 and VEGF in serum and BALF were significantly elevated, and the mRNA and protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues were significantly increased. Compared with the model group, SGMHD improved the behaviors of rats, alleviated pathological changes in lung tissues, mucin production, and collagen deposition, significantly decreased the levels of IL-4 and VEGF in serum and BALF, and reduced the mRNA expression levels of TRPV1, NRF-1, and mtTFA in lung tissues, with the medium-dose SGMHD group showing the most significant effect. Moreover, the protein expression levels of TRPV1, NRF-1, and mtTFA in lung tissues were also reduced, with the medium-dose SGMHD group exhibiting the most significant effect. In conclusion, this study demonstrates that SGMHD can alleviate airway inflammation and inhibit airway remodeling in cold-induced asthma rats. These effects may be associated with the modulation of the TRPV1/NRF-1/mtTFA signaling pathway.
		                        		
		                        		
		                        		
		                        			Rats
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Animals
		                        			;
		                        		
		                        			Mice
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		                        			Interleukin-4/metabolism*
		                        			;
		                        		
		                        			Vascular Endothelial Growth Factor A/metabolism*
		                        			;
		                        		
		                        			Rats, Sprague-Dawley
		                        			;
		                        		
		                        			Asthma/genetics*
		                        			;
		                        		
		                        			Lung
		                        			;
		                        		
		                        			Bronchoalveolar Lavage Fluid
		                        			;
		                        		
		                        			RNA, Messenger/metabolism*
		                        			;
		                        		
		                        			Collagen/metabolism*
		                        			;
		                        		
		                        			Mucins/therapeutic use*
		                        			;
		                        		
		                        			Ovalbumin
		                        			;
		                        		
		                        			Disease Models, Animal
		                        			;
		                        		
		                        			Mice, Inbred BALB C
		                        			;
		                        		
		                        			TRPV Cation Channels/metabolism*
		                        			;
		                        		
		                        			Drugs, Chinese Herbal
		                        			
		                        		
		                        	
6.Drug-coated balloons for the treatment of ostial left anterior descending or ostial left circumflex artery lesions: a patient-level propensity score-matched analysis.
Liang PAN ; Wen-Jie LU ; Zhan-Ying HAN ; San-Cong PAN ; Xi WANG ; Ying-Guang SHAN ; Meng PENG ; Xiao-Fei QIN ; Guo-Ju SUN ; Pei-Sheng ZHANG ; Jian-Zeng DONG ; Chun-Guang QIU
Journal of Geriatric Cardiology 2023;20(10):716-727
		                        		
		                        			BACKGROUND:
		                        			Controversy exists as to the optimal treatment approach for ostial left anterior descending (LAD) or ostial left circumflex artery (LCx) lesions. Drug-coated balloons (DCB) may overcome some of the limitations of drug-eluting stents (DES). Therefore, we investigated the security and feasibility of the DCB policy in patients with ostial LAD or ostial LCx lesions, and compared it with the conventional DES-only strategy.
		                        		
		                        			METHODS:
		                        			We retrospectively enrolled patients with de novo ostial lesions in the LAD or LCx who underwent interventional treatment. They were categorized into two groups based on their treatment approach: the DCB group and the DES group. The treatment strategies in the DCB group involved the use of either DCB-only or hybrid strategies, whereas the DES group utilized crossover or precise stenting techniques. Two-year target lesion revascularization was the primary endpoint, while the rates of major adverse cardiovascular events, cardiac death, target vessel myocardial infarction, and vessel thrombosis were the secondary endpoints. Using propensity score matching, we assembled a cohort with comparable baseline characteristics. To ensure result analysis reliability, we conducted sensitivity analyses, including interaction, and stratified analyses.
		                        		
		                        			RESULTS:
		                        			Among the 397 eligible patients, 6.25% of patients who were planned to undergo DCB underwent DES. A total of 108 patients in each group had comparable propensity scores and were included in the analysis. Two-year target lesion revascularization occurred in 5 patients (4.90%) and 16 patients (16.33%) in the DCB group and the DES group, respectively (odds ratio = 0.264, 95% CI: 0.093-0.752, P = 0.008). Compared with the DES group, the DCB group demonstrated a lower major adverse cardiovascular events rate (7.84% vs. 19.39%, P = 0.017). However, differences with regard to cardiac death, non-periprocedural target vessel myocardial infarction, and definite or probable vessel thrombosis between the groups were non-significant.
		                        		
		                        			CONCLUSIONS
		                        			The utilization of the DCB approach signifies an innovative and discretionary strategy for managing isolated ostial lesions in the LAD or LCx. Nevertheless, a future randomized trial investigating the feasibility and safety of DCB compared to the DES-only strategy specifically for de novo ostial lesions in the LAD or LCx is highly warranted.
		                        		
		                        		
		                        		
		                        	
7.Human chorionic gonadotropin-secreting gonadoblastomas in a girl of 45, X Turner syndrome: a case report and literature review.
Ru Jiang ZHENG ; Qiu Li CHEN ; Hua Mei MA ; Jun Cheng LIU ; Hua Dong CHEN ; Jian Bo LIANG ; Hong Shan CHEN ; Jun ZHANG ; Yan Hong LI ; Song GUO ; Bing WANG ; Minlian DU
Chinese Journal of Pediatrics 2022;60(11):1202-1206
		                        		
		                        			
		                        			Objective: To summarize the experience in diagnosis and treatment of 45, X Turner syndrome (TS) with gonadal Y chromosome mosaicism and bilateral gonadoblastoma (Gb) secreting human chorionic gonadotrophin(HCG). Methods: A female patient aged 5 years and 3 months was admitted to the hospital with a complaint of "enlarged breasts for 27 months, and elevated blood β-HCG for 8 months". The clinical data were summarized, and related literature up to March 2022 with the key words"Turner syndrome" "Gonadoblastoma" "Y chromosome" "human chorionic gonadotropin" "precocious" in PubMed, CNKI and Wanfang databases were reviewed. Results: The girl went to the local hospital for 2-month breast development at age of 3 years, and was found with a heart murmur diagnosed with "pulmonary venous malformation and atrial septal defect (secondary foramen type)". Surgical correction was performed. She experienced the progressive breast development, rapid linear growth and markedly advanced skeletal age, which cannot be explained by partial activation in the hypothalamic-pituitary-gonadal axis determined at the age of 3 years and 7 months in local hospital. Then whole-exome sequencing revealed chromosome number abnormality 45, X, which was confirmed by Karyotyping. At the age of 4 years and 6 months, serum β-HCG was found to be elevated (24.9 U/L) with no lesion found at the local hospital. On physical examination, she was found with breast development, pubic hair development and clitoromegaly with elevated serum testosterone (1.96 μg/L) and β-HCG (32.3 U/L). Sex determining region Y(SRY) gene was negative in peripheral blood sample. Thoracic and abdominal CT, head and pelvic magnetic resonance imaging were normal. Exploratory laparotomy confirmed the presence of a left adnexal tumor and a right fibrous streak gonad. During surgery, simultaneous samples of bilateral gonadal and peripheral venous blood were obtained and serum β-HCG, estradiol and testosteron concentrations was higher to lower from left gonadal venous blood, right gonadal venous blood, to peripheral venous blood. Bilateral gonadectomy was performed. Histopathology revealed bilateral gonadoblastomas. SRY was positive in bilateral gonadal tissues. After surgery, serum E2, testerone and β-HCG returned to normal. So far 4 cases of HCG-secreting gonadoblastoma had been reported worldwide. The phenotypes of the 4 cases were all female, with virilization or amenorrhea, and the preoperative peripheral blood β-HCG concentrations were 74.4, 5.0, 40 456.0, and 42.4 U/L, respectively. Conclusions: There is a high risk of Gb in TS with Y chromosome components. Gb is infrequently presented with breast development, and Gb associated with HCG secretion is rare. Karyotyping should be performed in a phenotypic female with masculinization, and virilization in TS indicates the presence of Y chromosome material with concurrent androgen secreting tumors.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Child, Preschool
		                        			;
		                        		
		                        			Gonadoblastoma/surgery*
		                        			;
		                        		
		                        			Turner Syndrome/complications*
		                        			;
		                        		
		                        			Virilism
		                        			;
		                        		
		                        			Chorionic Gonadotropin
		                        			;
		                        		
		                        			Ovarian Neoplasms
		                        			
		                        		
		                        	
8.Cell heterogeneity of laryngeal carcinoma and evolution trajectory of epithelial cells.
Shan Shan GU ; Zhi Sen SHEN ; Hong Xia DENG ; Shi Jie QIU ; Dong YE
Chinese Journal of Otorhinolaryngology Head and Neck Surgery 2022;57(2):168-177
		                        		
		                        			
		                        			Objective: To analyze the classification and functions of cell subsets in laryngeal carcinoma and metastatic lymph nodes, and to explore the evolution trajectory of epithelial cells to tumor cells. Methods: Single-cell RNA sequencing was performed on 5 cases of laryngeal cancer, matched metastatic lymph nodes and 3 normal tissues. Patients were admitted to Ningbo Medical Center Lihuili Hospital from October 22, 2019 to December 16, all patients were male, aged 53-70 years old. Cell subsets of the above-mentioned tissues were analyzed by the Seurat, and the biological functions of cell subpopulation were investigated by functional enrichment analysis. Malignant epithelial cells were identified using copy number variation (CNV). The evolutionary trajectory of epithelial cells to cancer cells was analyzed by cell trajectory analysis, and cancerous transitional cells were identified. The highly expressed genes in transitional cells were analyzed by the FindAllMarker of the Seurat and verified by immunohistochemistry. Results: A total of 66 969 high-quality cells were obtained in 9 major clusters: epithelial cells, T cells, B cells, fibroblasts, endothelial cells, myeloid cells, mast cells, plasmacytoid dendritic cells and nerve cells. The first 5 cell clusters were divided into 8, 6, 4, 3 and 2 subgroups, respectively. Four epithelial cell subsets (C0, C1, C2 and C5) were derived from tumor tissues and metastatic lymph nodes, and had high levels of CNV and tumor cell content. Cell trajectory analysis showed that the evolution trajectory of epithelial cells was from normal epithelial subpopulation C4 to early cancerous cell population C0, which differentiated into three major malignant cell subsets C1, C3, and C5. Epithelial cell C0 may represent the transitional cell population of carcinogenesis, and were enriched in biological processes such as epithelial-mesenchymal transformation and angiogenesis. C0 highly expressed sulforaphane (SFN) which may be related to the occurrence and development of cancer. Immunohistochemistry confirmed that SFN was highly expressed in tumor tissues and metastatic lymph nodes compared with paracancerous tissues. Conclusion: Single-cell sequencing may be used to elucidate the diversity of cells and functions in laryngeal carcinoma tissues and metastatic lymph nodes, and cell population C0 plays a key role in the evolution of cells.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Carcinoma, Squamous Cell/pathology*
		                        			;
		                        		
		                        			DNA Copy Number Variations
		                        			;
		                        		
		                        			Endothelial Cells/pathology*
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Laryngeal Neoplasms/pathology*
		                        			;
		                        		
		                        			Lymph Nodes/pathology*
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			
		                        		
		                        	
9.SARS-CoV-2 with transcription regulatory sequence motif mutation poses a greater threat.
Jin Long BEI ; Guo Feng XU ; Jia CHANG ; Xin Yu WANG ; Dong An QIU ; Ji Shou RUAN ; Xin LI ; Shan GAO
Journal of Southern Medical University 2022;42(3):399-404
		                        		
		                        			OBJECTIVE:
		                        			To analyze the mutations in transcription regulatory sequences (TRSs) of coronaviruss (CoV) to provide the basis for exploring the patterns of SARS-CoV-2 transmission and outbreak.
		                        		
		                        			METHODS:
		                        			A combined evolutionary and molecular functional analysis of all sets of publicly available genomic data of viruses was performed.
		                        		
		                        			RESULTS:
		                        			A leader transcription regulatory sequence (TRS-L) usually comprises the first 60-70 nts of the 5' UTR in a CoV genome, and the body transcription regulatory sequences (TRS-Bs) are located immediately upstream of the genes other than ORF1a and 1b. In each CoV genome, the TRS-L and TRS-Bs share a specific consensus sequence, namely the TRS motif. Any changes of nucleotide residues in the TRS motifs are defined as TRS motif mutations. Mutations in the TRS-L or multiple TRS-Bs result in superattenuated variants. The spread of super-attenuated variants may cause an increase in asymptomatic or mild infections, prolonged incubation periods and a decreased detection rate of the viruses, thus posing new challenges to SARS-CoV-2 prevention and control. The super-attenuated variants also increase their possibility of long-term coexistence with humans. The Delta variant is significantly different from all the previous variants and may lead to a large-scale transmission. The Delta variant (B.1.617.2) with TRS motif mutation has already appeared and shown signs of spreading in Singapore, which, and even the Southeast Asia, may become the new epicenter of the next wave of SARS-CoV-2 outbreak.
		                        		
		                        			CONCLUSION
		                        			TRS motif mutation will occur in all variants of SARS-CoV-2 and may result in super-attenuated variants. Only super-attenuated variants with TRS motif mutations will eventually lose the abilities of cross-species transmission and causing outbreaks.
		                        		
		                        		
		                        		
		                        			COVID-19/virology*
		                        			;
		                        		
		                        			Genome, Viral
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Mutation
		                        			;
		                        		
		                        			SARS-CoV-2/genetics*
		                        			
		                        		
		                        	
10.Research progress on anti-tumor effect of Chinese dragon's blood.
Ying-Ying TIAN ; Ai-Lin YANG ; Xiao-Nan CHEN ; Jia-Qi LI ; Lei-Meng-Yuan TANG ; Hui-Ming HUANG ; Ya-Xin LIU ; Hai-Ling QIU ; Li-Shan OUYANG ; Jun LI ; Peng-Fei TU ; Zhong-Dong HU
China Journal of Chinese Materia Medica 2021;46(8):2037-2044
		                        		
		                        			
		                        			As a traditional Chinese medicine, Chinese dragon's blood has multiple effects, such as activating blood to remove blood stasis, softening and dispelling stagnation, astringent and hemostasis, clearing swelling and relieving pain, regulating menstruation and rectifying the blood, so it is called "an effective medicine of promoting blood circulation". It has been widely used clinically to treat a variety of diseases. With the further research on Chinese dragon's blood, its anti-tumor medicinal value is gradually emerging. Modern pharmacological studies have shown that Chinese dragon's blood exerts anti-tumor effects mainly by inhibiting cell proliferation, inducing apoptosis, inducing DNA damage and cell cycle arrest, inducing senescence and autophagy of tumor cells, inhibiting metastasis and angiogenesis, as well as reversing multidrug resistance. This article focuses on the research progress on anti-tumor effects of Chinese dragon's blood extract and its chemical components, with a view to provide new references for the in-depth research and reasonable utilization of Chinese dragon's blood.
		                        		
		                        		
		                        		
		                        			China
		                        			;
		                        		
		                        			Dracaena
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Plant Extracts
		                        			;
		                        		
		                        			Resins, Plant
		                        			
		                        		
		                        	
            
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