1.Impact of early detection and management of emotional distress on length of stay in non-psychiatric inpatients: A retrospective hospital-based cohort study.
Wanjun GUO ; Huiyao WANG ; Wei DENG ; Zaiquan DONG ; Yang LIU ; Shanxia LUO ; Jianying YU ; Xia HUANG ; Yuezhu CHEN ; Jialu YE ; Jinping SONG ; Yan JIANG ; Dajiang LI ; Wen WANG ; Xin SUN ; Weihong KUANG ; Changjian QIU ; Nansheng CHENG ; Weimin LI ; Wei ZHANG ; Yansong LIU ; Zhen TANG ; Xiangdong DU ; Andrew J GREENSHAW ; Lan ZHANG ; Tao LI
Chinese Medical Journal 2025;138(22):2974-2983
BACKGROUND:
While emotional distress, encompassing anxiety and depression, has been associated with negative clinical outcomes, its impact across various clinical departments and general hospitals has been less explored. Previous studies with limited sample sizes have examined the effectiveness of specific treatments (e.g., antidepressants) rather than a systemic management strategy for outcome improvement in non-psychiatric inpatients. To enhance the understanding of the importance of addressing mental health care needs among non-psychiatric patients in general hospitals, this study retrospectively investigated the impacts of emotional distress and the effects of early detection and management of depression and anxiety on hospital length of stay (LOS) and rate of long LOS (LLOS, i.e., LOS >30 days) in a large sample of non-psychiatric inpatients.
METHODS:
This retrospective cohort study included 487,871 inpatients from 20 non-psychiatric departments of a general hospital. They were divided, according to whether they underwent a novel strategy to manage emotional distress which deployed the Huaxi Emotional Distress Index (HEI) for brief screening with grading psychological services (BS-GPS), into BS-GPS ( n = 178,883) and non-BS-GPS ( n = 308,988) cohorts. The LOS and rate of LLOS between the BS-GPS and non-BS-GPS cohorts and between subcohorts with and without clinically significant anxiety and/or depression (CSAD, i.e., HEI score ≥11 on admission to the hospital) in the BS-GPS cohort were compared using univariable analyses, multilevel analyses, and/or propensity score-matched analyses, respectively.
RESULTS:
The detection rate of CSAD in the BS-GPS cohort varied from 2.64% (95% confidence interval [CI]: 2.49%-2.81%) to 20.50% (95% CI: 19.43%-21.62%) across the 20 departments, with a average rate of 5.36%. Significant differences were observed in both the LOS and LLOS rates between the subcohorts with CSAD (12.7 days, 535/9590) and without CSAD (9.5 days, 3800/169,293) and between the BS-GPS (9.6 days, 4335/178,883) and non-BS-GPS (10.8 days, 11,483/308,988) cohorts. These differences remained significant after controlling for confounders using propensity score-matched comparisons. A multilevel analysis indicated that BS-GPS was negatively associated with both LOS and LLOS after controlling for sociodemographics and the departments of patient discharge and remained negatively associated with LLOS after controlling additionally for the year of patient discharge.
CONCLUSION
Emotional distress significantly prolonged the LOS and increased the LLOS of non-psychiatric inpatients across most departments and general hospitals. These impacts were moderated by the implementation of BS-GPS. Thus, BS-GPS has the potential as an effective, resource-saving strategy for enhancing mental health care and optimizing medical resources in general hospitals.
Humans
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Retrospective Studies
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Male
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Length of Stay/statistics & numerical data*
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Female
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Middle Aged
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Adult
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Psychological Distress
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Inpatients/psychology*
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Aged
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Anxiety/diagnosis*
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Depression/diagnosis*
2.Chemical constituents of Sophorae Flavescentis Radix and its residue based on UPLC-Q-TOF-MS.
Qian-Wen LIU ; Rong-Qing ZHU ; Qian-Nan HU ; Xiang LI ; Guang YANG ; Zi-Dong QIU ; Zhi-Lai ZHAN ; Tie-Gui NAN ; Mei-Lan CHEN ; Li-Ping KANG
China Journal of Chinese Materia Medica 2025;50(3):708-718
Sophorae Flavescentis Radix is one of the commonly used traditional Chinese medicine in China, and a large amount of pharmaceutical residue generated during its processing and production is discarded as waste, which not only wastes resources but also pollutes the environment. Therefore, elucidating the chemical composition of the residue of Sophorae Flavescentis Radix and the differences between the residue and Sophorae Flavescentis Radix itself is of great significance for the comprehensive utilization of the residue. This study, based on ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS) technology combined with multivariate statistical methods, provides a thorough characterization, identification, and differential analysis of the overall components of Sophorae Flavescentis Radix and its residue. Firstly, 61 compounds in Sophorae Flavescentis Radix were rapidly identified based on their precise molecular weight, fragment ions, and compound abundance, using a self-constructed compound database. Among them, 41 compounds were found in the residue, mainly alkaloids and flavonoids. Secondly, through principal component analysis(PCA) and orthogonal partial least squares discriminant analysis(OPLS-DA), 15 key compounds differentiating Sophorae Flavescentis Radix from its residue were identified. These included highly polar alkaloids, such as oxymatrine and oxysophocarpine, which showed significantly reduced content in the residue, and less polar flavonoids, such as kurarinone and kuraridin, which were more abundant in the residue. In summary, this paper clarifies the overall composition, structure, and content differences between Sophorae Flavescentis Radix and its residue, suggesting that the residue of Sophorae Flavescentis Radix can be used as a raw material for the extraction of its high-activity components, with promising potential for development and application in cosmetics and daily care. This research provides a scientific basis for the future comprehensive utilization of Sophorae Flavescentis Radix and its residue.
Drugs, Chinese Herbal/chemistry*
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Chromatography, High Pressure Liquid/methods*
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Mass Spectrometry/methods*
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Sophora/chemistry*
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Flavonoids/chemistry*
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Alkaloids/chemistry*
3.Clinical Analysis of Extranodal NK/T-Cell Lymphoma, Nasal Type with Skin Lesions as Initial Symptom.
Ping CHENG ; Yi LI ; Xia MAO ; Qiu-Xiang WANG ; Lan-Lan WANG ; Jun GUAN ; Ying ZHOU ; Hui CHENG
Journal of Experimental Hematology 2025;33(2):416-422
OBJECTIVE:
To investigate the clinical features, treatment and prognosis of extranodal NK/T-cell lymphoma, nasal type (ENKTL) with skin lesions as initial symptom.
METHODS:
The clinical data of 11 ENKTL patients with skin lesions as initial symptom were retrospectively analyzed from August 2016 to January 2023 in Wuhan First Hospital and Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology.
RESULTS:
Among the 11 patients, there were 6 males and 5 females, with a median age of 50(32-80) years. All patients had different forms of skin lesions as initial clinical symptom, including rash, ulcerative mass, painful skin nodules, infiltrating macula, etc. Most of the skin lesions were involved in the limbs and trunk but also appeared in the lower limbs alone. Five patients had hemophagocytic lymphohistiocytosis (HLH) at initial diagnosis, and 8 patients had B symptoms. All patients were diagnosed with advanced clinical staging (Lugano staging IV), and classified as high risk (PINK-E score ≥3). Immunohistochemical examination revealed that the positive rates of CD56 and EBER were both 100%, and the median Ki-67 index was 75%(50%-80%). Plasma EBV-DNA tests were all positive (≥5×102 copies/ml). Most of the induction chemotherapy regimens were combination chemotherapy (MESA, p-Gemox, SMILE) containing pegaspargase or L-asparaginase, or combined with PD-1 monoclonal immunotherapy, or HLH regimens (HLH-04 regimen, L-DEP). The median follow-up time and overall survival (OS) time were both 4.5(0.5-27) months. During the follow-up period, all 8 patients who did not receive autologous hematopoietic stem cell transplantation (ASCT) died, most of whom died of rapid disease progression. Three patients received ASCT, one died of central nervous system recurrence after transplantation, and two survived. The OS of three patients who underwent ASCT was 21, 27, and 19 months, and PFS was 11, 20, and 13 months, respectively. The plasma EBV-DNA copy number was monitored irregularly after transplantation, and the load of EBV was consistent with the changes of the disease.
CONCLUSIONS
Early clinical symptoms of ENKTL patients with skin lesions as initial symptom are more atypical, and early diagnosis is particularly difficult. The disease progresses rapidly and the prognosis is poor. There is still no uniform standard for the best treatment strategy. The survival of patients can be significantly prolonged by applying ASCT as soon as possible after complete remission obtained by high-dose induction chemotherapy.
Humans
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Male
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Female
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Lymphoma, Extranodal NK-T-Cell/diagnosis*
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Middle Aged
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Adult
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Retrospective Studies
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Aged
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Prognosis
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Aged, 80 and over
4.Expert consensus on intentional tooth replantation.
Zhengmei LIN ; Dingming HUANG ; Shuheng HUANG ; Zhi CHEN ; Qing YU ; Benxiang HOU ; Lihong QIU ; Wenxia CHEN ; Jiyao LI ; Xiaoyan WANG ; Zhengwei HUANG ; Jinhua YU ; Jin ZHAO ; Yihuai PAN ; Shuang PAN ; Deqin YANG ; Weidong NIU ; Qi ZHANG ; Shuli DENG ; Jingzhi MA ; Xiuping MENG ; Jian YANG ; Jiayuan WU ; Lan ZHANG ; Jin ZHANG ; Xiaoli XIE ; Jinpu CHU ; Kehua QUE ; Xuejun GE ; Xiaojing HUANG ; Zhe MA ; Lin YUE ; Xuedong ZHOU ; Junqi LING
International Journal of Oral Science 2025;17(1):16-16
Intentional tooth replantation (ITR) is an advanced treatment modality and the procedure of last resort for preserving teeth with inaccessible endodontic or resorptive lesions. ITR is defined as the deliberate extraction of a tooth; evaluation of the root surface, endodontic manipulation, and repair; and placement of the tooth back into its original socket. Case reports, case series, cohort studies, and randomized controlled trials have demonstrated the efficacy of ITR in the retention of natural teeth that are untreatable or difficult to manage with root canal treatment or endodontic microsurgery. However, variations in clinical protocols for ITR exist due to the empirical nature of the original protocols and rapid advancements in the field of oral biology and dental materials. This heterogeneity in protocols may cause confusion among dental practitioners; therefore, guidelines and considerations for ITR should be explicated. This expert consensus discusses the biological foundation of ITR, the available clinical protocols and current status of ITR in treating teeth with refractory apical periodontitis or anatomical aberration, and the main complications of this treatment, aiming to refine the clinical management of ITR in accordance with the progress of basic research and clinical studies; the findings suggest that ITR may become a more consistent evidence-based option in dental treatment.
Humans
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Tooth Replantation/methods*
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Consensus
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Periapical Periodontitis/surgery*
5.Stress analysis of trabecular hip prosthesis stem implantation
Bo LI ; Li-Lan GAO ; Ya CHEN ; Shu-Hong LIU ; Ya-Hui HU ; Lin-Wei LYU ; Jin-Duo YE ; Chun-Qiu ZHANG
Chinese Medical Equipment Journal 2024;45(3):29-35
Objective To analyze the stresses in implanted titanium solid and bone trabecular prosthesis hip replacements.Methods A femur model was built inversely based on Mimics software,and optimized using Geomagic software,and then materialized by SolidWorks software.The osteotomized femur was assembled with the metal femoral stem to form a model,and then the model was imported into ABAQUS for finite element calculation.The upper femur was divided into four regions in different states of integration:medial proximal point(small trochanter region),lateral proximal region(large trochanter region),proximal point of the femoral stem(region around the mid-portion of the styloid process)and distal region(around the end of the styloid process and distal portion).Calculations were carried out over the femoral stresses before and after implantation of titanium solid and trabecular prostheses under gait and stair-climbing loads and the interfacial stresses when the region was unintegrated.The type of deformation at the bone interface was analyzed by means of a stress ellipsoid.Results At the small trochanter region,the stress shielding rates of the trabecular prosthesis under gait and stair climbing loads were reduced by 20.5%and 14.7%compared to the titanium solid prosthesis,respectively.In case of different integration states of the titanium solid prosthesis,the interface tensile stresses under the gait and stair climbing loads were up to 10.842 MPa and 12.900 MPa,and the shear stresses reached 7.050 MPa and 6.805 MPa,respectively;in case of different integration states of the trabecular prosthesis,the interface tensile stresses under the gait and stair climbing loads were up to 3.858 MPa and 4.389 MPa,and the shear stresses reached 4.156 MPa and 3.854 MPa,respectively.Under the 2 different loads,the inboard shear stress ellipsoid of the interface opened toward the sides and the bone interface showed tensile deformation;the outboard shear stress ellipsoid of the interface opened up and down and had compressive deformation.Conclusion After total hip arthroplasty,the overall performance of the trabecular prosthesis is better than that of the titanium solid prosthesis.The unintegrated edges of the prosthesis-bone interface are susceptible to stress concentrations and distortion which may result in occurrence of failures.[Chinese Medical Equipment Journal,2024,45(3):29-35]
6.Expert consensus on difficulty assessment of endodontic therapy
Huang DINGMING ; Wang XIAOYAN ; Liang JINGPING ; Ling JUNQI ; Bian ZHUAN ; Yu QING ; Hou BENXIANG ; Chen XINMEI ; Li JIYAO ; Ye LING ; Cheng LEI ; Xu XIN ; Hu TAO ; Wu HONGKUN ; Guo BIN ; Su QIN ; Chen ZHI ; Qiu LIHONG ; Chen WENXIA ; Wei XI ; Huang ZHENGWEI ; Yu JINHUA ; Lin ZHENGMEI ; Zhang QI ; Yang DEQIN ; Zhao JIN ; Pan SHUANG ; Yang JIAN ; Wu JIAYUAN ; Pan YIHUAI ; Xie XIAOLI ; Deng SHULI ; Huang XIAOJING ; Zhang LAN ; Yue LIN ; Zhou XUEDONG
International Journal of Oral Science 2024;16(1):15-25
Endodontic diseases are a kind of chronic infectious oral disease.Common endodontic treatment concepts are based on the removal of inflamed or necrotic pulp tissue and the replacement by gutta-percha.However,it is very essential for endodontic treatment to debride the root canal system and prevent the root canal system from bacterial reinfection after root canal therapy(RCT).Recent research,encompassing bacterial etiology and advanced imaging techniques,contributes to our understanding of the root canal system's anatomy intricacies and the technique sensitivity of RCT.Success in RCT hinges on factors like patients,infection severity,root canal anatomy,and treatment techniques.Therefore,improving disease management is a key issue to combat endodontic diseases and cure periapical lesions.The clinical difficulty assessment system of RCT is established based on patient conditions,tooth conditions,root canal configuration,and root canal needing retreatment,and emphasizes pre-treatment risk assessment for optimal outcomes.The findings suggest that the presence of risk factors may correlate with the challenge of achieving the high standard required for RCT.These insights contribute not only to improve education but also aid practitioners in treatment planning and referral decision-making within the field of endodontics.
7.Vaccination against coronavirus disease 2019 in patients with pulmonary hypertension: A national prospective cohort study
Xiaohan WU ; Jingyi LI ; Jieling MA ; Qianqian LIU ; Lan WANG ; Yongjian ZHU ; Yue CUI ; Anyi WANG ; Cenjin WEN ; Luhong QIU ; Yinjian YANG ; Dan LU ; Xiqi XU ; Xijie ZHU ; Chunyan CHENG ; Duolao WANG ; Zhicheng JING
Chinese Medical Journal 2024;137(6):669-675
Background::Coronavirus disease 2019 (COVID-19) has potential risks for both clinically worsening pulmonary hypertension (PH) and increasing mortality. However, the data regarding the protective role of vaccination in this population are still lacking. This study aimed to assess the safety of approved vaccination for patients with PH.Methods::In this national prospective cohort study, patients diagnosed with PH (World Health Organization [WHO] groups 1 and 4) were enrolled from October 2021 to April 2022. The primary outcome was the composite of PH-related major adverse events. We used an inverse probability weighting (IPW) approach to control for possible confounding factors in the baseline characteristics of patients.Results::In total, 706 patients with PH participated in this study (mean age, 40.3 years; mean duration after diagnosis of PH, 8.2 years). All patients received standardized treatment for PH in accordance with guidelines for the diagnosis and treatment of PH in China. Among them, 278 patients did not receive vaccination, whereas 428 patients completed the vaccination series. None of the participants were infected with COVID-19 during our study period. Overall, 398 patients received inactivated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine, whereas 30 received recombinant protein subunit vaccine. After adjusting for baseline covariates using the IPW approach, the odds of any adverse events due to PH in the vaccinated group did not statistically significantly increase (27/428 [6.3%] vs. 24/278 [8.6%], odds ratio = 0.72, P = 0.302). Approximately half of the vaccinated patients reported at least one post-vaccination side effects, most of which were mild, including pain at the injection site (159/428, 37.1%), fever (11/428, 2.6%), and fatigue (26/428, 6.1%). Conclusions::COVID-19 vaccination did not significantly augment the PH-related major adverse events for patients with WHO groups 1 and 4 PH, although there were some tolerable side effects. A large-scale randomized controlled trial is warranted to confirm this finding. The final approval of the COVID-19 vaccination for patients with PH as a public health strategy is promising.
8.Application effect of disinfection-oriented bundle management mode on en-vironmental cleaning and disinfection quality management of intensive care unit
Xiao SONG ; Qiu-Lan CHEN ; Li-Ping FU
Chinese Journal of Infection Control 2024;23(6):742-749
Objective To explore the application effect of disinfection-oriented bundle management mode of envi-ronmental cleaning and disinfection quality management of intensive care unit(ICU).Methods The bundle mana-gement mode was used to intervene the cleaning and disinfection of ICU environment.January-December 2022 and January-December 2023 were classified as pre-and post-intervention periods respectively.The awareness rate of dis-infection knowledge,monitoring results of environmental hygiene,detection of MDRO and healthcare-associated in-fection(HAI)of patients before and after intervention were compared.Results The awareness rates of disinfection knowledge and the clearance rate of fluorescent labeling on frequently-touched environmental surface increased from 68.58%and 78.45%(pre-intervention)to 88.45%and 96.44%(post-intervention),respectively,both with sta-tistical significance(both P<0.05).The qualification rates of bacterial culture from frequently-touched environ-mental surface and hands of healthcare workers(HCWs)increased from 70.63%and 87.90%(pre-intervention)to 88.36%and 94.15%(post-intervention),respectively,both with statistical significance(both P<0.05).The de-tection rates of methicillin-resistant Staphylococcus aureus(MRSA)and carbapenem-resistant Acinetobacter bau-mannii(CRAB)from frequently-touched environmental surface were 0.49%and 1.46%(pre-intervention),as well as 0 and 0.27%(post-intervention),respectively,both with statistical significance(both P<0.05).The inci-dences of HAI(4.97%)and CRAB HAI(0.77%)post-intervention were lower than pre-intervention(7.46%and 1.62%,respectively),differences were both statistically significant(both P<0.05).Conclusion Intervention in environmental cleaning and disinfection of ICU with bundle management mode can effectively improve the effect of cleaning and disinfection in ICU,enhance cleaners'awareness on disinfection prevention and control,decrease the detection rates of MRSA and CRAB,reduce the risk of HAI,and ensure medical safety.
9.Comparison of Wild and Cultivated Codonopsis pilosula Based onTraditional Quality Evaluation
Xiaoyan LAN ; Chunfang TIAN ; Zhilai ZHAN ; Li ZHOU ; Xiang LI ; Zidong QIU ; Tiegui NAN ; Qili YUAN ; Xiaoliang LIN ; Congkui TIAN ; Meilan CHEN ; Liping KANG
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(14):156-164
ObjectiveTo conduct a systematic comparative study on wild and cultivated Codonopsis pilosula(CP) from three aspects, including characters, microscopy, and contents of primary and secondary metabolites. MethodWild and cultivated CP samples were collected, their characters were measured using vernier caliper, tape measure and balance, the paraffin sections were stained with safranin-fixed green dyeing, and their microstructure were observed under the optical microscope. The content of alcohol-soluble extracts in wild and cultivated CP was determined according to the method for determination of extract under CP in the 2020 edition of Chinese Pharmacopoeia, the starch content was determined by anthrone colorimetry, the content of total polysaccharides was determined by kit method, Fiber analyzer was used to determine the content of fiber components, and ultra performance liquid chromatography(UPLC) was used to determine the content of monosaccharides, disaccharides and some secondary metabolites. Multivariate statistical analysis methods such as principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA) were employed to screen key differential components between wild and cultivated CP on the basis of variable importance in the projection(VIP) value>1 and P<0.05. ResultIn terms of morphological characteristics, the "lion's head-like" shape, longitudinal wrinkles, and circumferential wrinkles below the root cap of wild CP were more pronounced in wild CP compared to the cultivated ones. Regarding transverse sectional features, wild CP had more fissures on the outer side of the cortex and a larger duramen. Under microscopic examination, wild CP had more stone cells, a larger proportion of xylem, and the presence of cork cells arranged in rings in the xylem, while cultivated CP has a larger proportion of phloem, smaller vessel diameters, and a more loosely arranged vascular system. In terms of primary metabolites, the contents of 45% ethanol-soluble extract and total polysaccharides in cultivated CP were significantly higher than those in the wild ones(P<0.05), the contents of lignin, hemicellulose, cellulose, fructose and glucose in wild CP were significantly higher than those in the cultivated ones(P<0.05), while sucrose content in the cultivated CP was significantly higher than that in the wild ones(P<0.05). Concerning secondary metabolites, the contents of tryptophan and tangshenoside Ⅰ in cultivated CP were significantly higher than those in the wild ones(P<0.05), whereas the contents of lobetyolinin, lobetyol and atractylenolide Ⅲ in wild CP were significantly higher than those in the cultivated ones(P<0.05). ConclusionThere are significant differences between wild and cultivated CP in terms of morphological characteristics, microscopic features and chemical composition. Glucose, fructose, sucrose, tangshenoside Ⅰ, tryptophan and cellulose components are the key differential components between wild and cultivated CP. Wild CP contains more polyacetylenes and fructose, whereas cultivated CP has higher levels of tangshenoside Ⅰ and sucrose, with noticeably lower cellulose content. These distinctions may be related to their growth conditions, growth years and cultivation techniques. Based on the results of this study, it is recommended to increase polyacetylenes and the content ratio of fructose to sucrose as an indicators to characterize different production methods of CP, in order to guide the high-quality production of CP.
10.Comparison of Wild and Cultivated Paeoniae Radix Rubra Based on Traditional Quality Evaluation
Chunfang TIAN ; Qiannan HU ; Zhilai ZHAN ; Xiaoyan LAN ; Xiang LI ; Li ZHOU ; Tiegui NAN ; Zidong QIU ; Liping KANG
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(14):165-174
ObjectiveTo compare wild and cultivated Paeoniae Radix Rubra(PRR) in three aspects, including character, microscope, determination of primary and secondary metabolites. MethodSeventeen batches of wild and nine batches of cultivated PRR were collected,their character data were measured by vernier caliper and scales, and their paraffin sections were made by safranin-fixed green dyeing for the observation of microscopic features. The content of ethanol-soluble extracts and total tannin from wild and cultivated PRR was determined by the method of general principle 2201 and 2202 in the 2020 edition of Chinese Pharmacopoeia, the content of polysaccharides was determined by phenol-sulfuric acid method. Anthrone colorimetry was used to determine the content of starch, and Van Soest method of washing fiber was used to determine the content of fiber. The contents of fructose, glucose and sucrose in wild and cultivated PRR were determined by ultra-high performance liquid chromatography evaporative light scattering detection(UPLC-ELSD), and the secondary metabolites(gallic acid, methyl gallate, catechin, oxypaeoniflorin, albiflorin, paeoniflorin, ellagic acid, 1,3,4,6-tetragalloylglucose, galloylpaeoniflorin, 1,2,3,4,6-O-pentagalloylglucose, naringenin, benzoylpaeoniflorin and benzoylalbiflorin) were determined by UPLC. Principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA) were used to analyze the data of wild and cultivated PRR, the contribution of different factors to the difference was determined according to the variable importance in the projection(VIP) value>1 and P<0.05. ResultIn term of characters, wild PRR showed the traditional characteristic of Zaopi Fencha, its outer skin was loose and easy to fall off, its surface had longitudinal furrow and wrinkle, but the outer skin of cultivated PRR was not easy to fall off, and its surface was relatively smooth. The radial texture of xylem of wild PRR cross-section was more obvious, showing radial striations, vacuoles and more cracks, while the radial texture of xylem of cultivated PRR cross-section was not obvious, dense and some had cracks. Microscopically, the number of radial vessels arranged in the xylem of wild PRR was more than that of cultivated PRR, the number of calcium oxalate clusters in the phloem and xylem of wild PRR was more than that of cultivated PRR, while the number of starch grains was significantly higher in cultivated PRR. In terms of the content of primary chemical constituents, the contents of polysaccharides and starch of cultivated PRR were significantly higher than those of wild PRR(P<0.05), while the contents of cellulose, lignin, fructose and glucose of wild PRR were significantly higher than those of cultivated PRR(P<0.05). The results of determination of 13 secondary metabolites showed that the contents of paeoniflorin, methyl gallate, catechin and oxypaeoniflorin in wild PRR were significantly higher than those in cultivated PRR(P<0.05), while the contents of albiflorin, gallic acid, ellagic acid, naringenin, benzoylpaeoniflorin and benzoylalbiflorin were significantly lower than those of cultivated PRR(P<0.05). A total of 10 variables contributing to the differentiation between wild and cultivated PRR were screened, including albiflorin, cellulose, benzoylpaeoniflorin, oxypaeoniflorin, naringenin, ellagic acid, starch, lignin, paeoniflorin and total tannins. ConclusionThere are significant differences between wild and cultivated PRR in characters, microscopic characteristics, contents of primary and secondary metabolites. It is suggested that the content ratio of paeoniflorin and albiflorin, the contents of oxypaeoniflorin and cellulose can be used as indicators to characterize production methods of PRR so as to improve the quality standard of PRR. This study can provide reference for the improvement of quality standard of PRR and the guidance of high quality production of PRR.

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