1.Exploring Chemical Constituent Distribution in Blood/Brain(Hippocampus) and Emotional Regulatory Effect of Raw and Vinegar-processed Products of Citri Reticulatae Pericarpium Viride
Yi BAO ; Yonggui SONG ; Qianmin LI ; Zhifu AI ; Genhua ZHU ; Ming YANG ; Huanhua XU ; Qin ZHENG ; Yiting HUANG ; Zihan GAO ; Dan SU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):189-197
ObjectiveTo investigate the migration and distribution characteristics of chemical constituents in blood and hippocampal tissues before and after vinegar processing of Citri Reticulatae Pericarpium Viride(CRPV), and to explore the potential material basis and mechanisms underlying their regulatory effects on emotional disorders by comparing the effects of raw and vinegar-processed products of CRPV. MethodsUltra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS/MS) was employed to characterize and identify the chemical constituents of raw and vinegar-processed products of CRPV extracts, as well as their migrating components in blood and hippocampal tissues after oral administration. Reference standards, databases, and relevant literature were utilized for compound annotation, with data processing performed using PeakView 1.2 software. Seventy male C57BL/6 mice were randomly divided into seven groups, including the blank group, model group, diazepam group(2.5 mg·kg-1), raw CRPV low/high dose groups(0.6, 1.2 g·kg-1), and vinegar-processed CRPV low/high dose groups(0.6, 1.2 g·kg-1), with 10 mice per group. Except for the blank group, all other groups underwent chronic restraint stress(2 h·d-1) for 20 d. Each drug-treated group received oral administration at the predetermined dose starting 10 d after modeling, with a total treatment duration of 10 d. Following model-based drug administration, mice underwent open-field, forced swimming, and elevated plus maze tests. After anesthesia with isoflurane, whole brains were collected from each group of mice, and hippocampi were dissected. Reactive oxygen species(ROS) level in hippocampal tissues was quantified by enzyme-linked immunosorbent assay(ELISA). Hematoxylin-eosin(HE) staining was used to observe hippocampal tissue morphology. Immunofluorescence was performed to detect neuronal nuclei(NeuN) and peroxisome proliferator-activated receptor alpha(PPARα) expressions in hippocampal tissue. Then, pharmacodynamic evaluations were conducted to assess the effects of raw and vinegar-processed CRPV on mood disorders, exploring the potential mechanisms. ResultsVinegar processing caused significant changes in the chemical composition of CRPV, with 18 components showing increased relative content and 35 components showing decreased relative content. The primary changes occurred in flavonoid compounds, including 20 flavonoids, 20 flavonoid glycosides, 3 triterpenes, 3 phenolic acids, 1 alkaloid, and 6 other compounds. Twenty-one components were detected in blood(15 methoxyflavones, 4 flavonoid glycosides, and 2 phenolic acids), with 17 shared between raw and vinegar-processed CRPV. Seven components reached hippocampal tissues(all common to both forms). In regulating emotional disorders, Vinegar-processed CRPV exhibited superior antidepressant-like effects compared to raw products. HE staining revealed that both treatments improved hippocampal neuronal morphology, particularly in the damaged CA1 and CA3 regions. Immunofluorescence and ELISA analyses demonstrated that both raw and vinegar-processed CRPV significantly modulated NeuN and PPARα expressions in hippocampal tissue while alleviating oxidative stress induced by excessive ROS(P<0.05). ConclusionThe chemical composition of CRPV undergoes changes after vinegar processing, but the migrating components in blood and hippocampus are primarily methoxyflavonoids. These components may serve as the potential material basis for activating the PPARα pathway, thereby negatively regulating ROS generation in the hippocampus, reducing oxidative stress, and promoting the development of NeuN-positive neurons. These findings provide experimental evidence for enhancing quality standards, pharmacodynamic material research, and active drug development of raw and vinegar-processed CRPV.
2.Syndrome Differentiation and Treatment Mechanisms of Inflammatory Injury in Diabetic Cardiomypathy from Theory of "Gaozhuo"
Xiaoyue WANG ; Yunfeng YU ; Xiangning HUANG ; Yixin XIANG ; Sihao ZHANG ; Qin XIANG ; Rong YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):235-244
Diabetic cardiomyopathy (DCM) is one of the most common complications of diabetes mellitus and is a major threat to global health. As a key mechanism in the occurrence and progression of DCM, the inflammatory response persists throughout the entire course of the DCM. The Gaozhuo theory suggests that the basic pathogenesis of inflammatory injury in DCM is the Qi deficiency of spleen and kidney and Gaozhuo invasion, and divides the pathological process into three phases: Gaozhuo invasion, turbid heat damage to the channels, and turbid blood stasis and heat junction. Among them, the Qi deficiency of spleen and kidney and the endogenous formation of Gaozhuo represent the process of inflammatory factor formation induced by glucose metabolism disorders. Turbid heat damage to the channels refers to the process of myocardial inflammatory injury mediated by inflammatory factors, and turbid blood stasis and heat junction are the process of myocardial injury developing toward myocardial fibrosis and ventricular remodeling. As the disease continues to progress, it eventually develops into a depletion of the heart Yang, leading to the ultimate regression of heart failure. According to the theory of Gaozhuo, traditional Chinese medicine (TCM) should regulate inflammatory injury in DCM by strengthening the spleen and tonifying the kidney to address the root cause, and resolving dampness and lowering turbidity to treat the symptoms. If the turbidity has been stored for a long time and turns into heat, strengthening the spleen and tonifying the kidney, and clearing heat and resolving turbidity should be the therapy. If the turbidity, stasis, and heat are knotted in the heart and collaterals, strengthening the spleen and tonifying the kidney, and resolving stasis and lowering turbidity should be the therapy. TCM compounds and monomers can regulate the inflammatory response in DCM. TCM compounds can be divided into the categories for benefiting Qi to resolve turbidity, benefiting Qi and clearing heat to resolve turbidity, and benefiting Qi and activating blood to reduce turbidity. The compounds can inhibit upstream signals of inflammation and expression of inflammatory factors, improve the inflammatory damage to myocardium and blood vessels, myocardial fibrosis, and cardiac systole and diastole, and thus slow down the onset and progression of DCM.
3.Syndrome Differentiation and Treatment Mechanisms of Hepatic Stellate Cell Activation in Type 2 Diabetes Mellitus Combined with Non-alcoholic Fatty Liver Disease Based on Theory of "Gaozhuo"
Yixin XIANG ; Yunfeng YU ; Xiaoyue WANG ; Xiangning HUANG ; Qin XIANG ; Rong YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(2):253-260
Non-alcoholic fatty liver disease (NAFLD) is one of the most common complications of type 2 diabetes mellitus (T2DM), and hepatic stellate cell (HSC) activation is the key link in the progression of NAFLD to liver fibrosis. According to the theory of "Gaozhuo", spleen deficiency and Qi stagnation, along with Gaozhuo invasion, are the causes of NAFLD progression to liver fibrosis, which reveals the pathogenesis essence of HSC activation in traditional Chinese medicine (TCM). Among them, spleen deficiency and Qi stagnation are the root causes of the endogenous formation of Gaozhuo. Spleen deficiency indicates the insulin sensitivity decrease and glucose metabolism disorders, and Qi stagnation means the dysregulation of hepatic glucose and lipid metabolism, which creates the preconditions for HSC activation. Gaozhuo invasion is the direct cause of HSC activation, including three stages: Internal retention of Gaozhuo, turbidity and stasis stagnation, and toxic stasis and consolidation. Internal retention of Gaozhuo refers to the abnormal metabolism and deposition of hepatic lipids, as well as the microcirculatory disorders. Turbidity and stasis stagnation is the process by which lipotoxicity stimulates the transformation of HSC into myofibroblast (MFB), and toxic stasis and consolidation represent the secretion of a large amount of extracellular matrix (ECM) by MFB to promote the fibrosis. According to the theory of Gaozhuo and the activation process of HSC, syndromes for T2DM combined with NAFLD can be classified into spleen deficiency and Qi stagnation with internal retention of Gaozhuo, spleen Qi deficiency with turbidity and stasis stagnation, and spleen Qi deficiency with toxic stasis and consolidation. Clinically, the treatment principle is to strengthen the spleen and promote Qi, resolve turbidity, and eliminate blood stasis. Both TCM compounds and monomers can effectively inhibit the HSC activation. TCM compounds can be classified into categories for regulating spleen and harmonizing liver, resolving turbidity and removing stasis, and detoxifying and removing stasis. They mainly work by improving lipid metabolism, reducing lipid accumulation in the liver, alleviating inflammatory and oxidative stress responses, inhibiting the activation and proliferation of HSC, and reducing ECM deposition, thereby delaying the progression of liver fibrosis.
4.Optimization of drug management model for investigator-initiated trial with benchmarking analysis
Yufei XI ; Tianxiao WANG ; Xue ZHANG ; Yingzhuo DING ; Li YAN ; Feng JIANG ; Xiangui HE ; Jiannan HUANG ; Qin LI
China Pharmacy 2025;36(3):280-284
OBJECTIVE To optimize the management model of drugs used in investigator-initiated trial (IIT). METHODS With benchmarking analysis, based on the practical work experience of a tertiary specialized hospital in the field of IIT drug management in Shanghai, a thorough review was conducted, involving relevant laws, regulations, and academic literature to establish benchmark criteria and the evaluation standards. Starting from the initiation of IIT projects, a detailed comparative analysis of key processes was carried out, such as the receipt, storage, distribution, use and recycling of drugs for trial. The deficiencies in the current management of IIT drugs were reviewed in detail and a series of optimization suggestions were put forward. RESULTS It was found that the authorized records of drug management were missing, the training before project implementation was insufficient, and the records of receipt and acceptance of IIT drugs were incomplete. In light of these existing problems, improvement measures were put forward, including strengthening the training of drug administrators and stipulating that only drug administrators with pharmacist qualifications be eligible to inspect and accept drugs, etc. The related systems were improved, and 17 key points of quality control for the management of IIT drugs were developed. CONCLUSIONS A preliminary IIT drug management system for medical institutions has been established, which helps to improve the institutional X2023076) framework of medical institutions in this field.
5.Standardization of outpatient medical record in rehabilitation setting
Ye LIU ; Qing QIN ; Haiyan YE ; Yifan TIAN ; Yingxin ZHANG ; Yaru YANG ; Zhongyan WANG ; Meng ZHANG ; Xiaoxie LIU ; Yanyan YANG ; Bin ZENG ; Mouwang ZHOU ; Yuxiao XIE ; Guangxu XU ; Jiejiao ZHENG ; Mingsheng ZHANG ; Xiangming YE ; Fubiao HUANG ; Qiuchen HUANG ; Yiji WANG ; Di CHEN ; Zhuoying QIU
Chinese Journal of Rehabilitation Theory and Practice 2025;31(1):45-54
ObjectiveTo analyze the data structure and standards of rehabilitation outpatient medical records, to provide data support for improving the quality of rehabilitation outpatient care and developing medical insurance payment policies. MethodsBased on the normative documents issued by the National Health Commission, Basic Standards for Medical Record Writing and Standards for Electronic Medical Record Sharing Documents, in accordance with the Quality Management Regulations for Outpatient (Emergency) Diagnosis and Treatment Information Pages (Trial), reference to the framework of the World Health Organization Family of International Classifications (WHO-FICs), the data framework and content of rehabilitation outpatient medical records were determined, and the data standards were discussed. ResultsThis study constructed a data framework for rehabilitation outpatient medical records, including four main components: patient basic information, visit process information, diagnosis and treatment information, and cost information. Three major reference classifications of WHO-FICs, International Classification of Diseases, International Classification of Functioning, Disability and Health, and International Classification of Health Interventions,were used to establish diagnostic standards and standardized terminology, as well as coding disease diagnosis, functional description, functional assessment, and rehabilitation interventions, to improve the quality of data reporting, and level of quality control in rehabilitation. ConclusionThe structuring and standardization of rehabilitation outpatient medical records are the foundation for sharing of rehabilitation data. The using of the three major classifications of WHO-FICs is valuable for the terminology and coding of disease diagnosis, functional description and assessment, and intervention in rehabilitation outpatient medical records, which is significant for sharing and interconnectivity of rehabilitation outpatient data, as well as for optimizing the quality and safety of rehabilitation medical services.
6.Structure, content and data standardization of inpatient rehabilitation medical record summary sheet
Haiyan YE ; Qing QIN ; Ye LIU ; Yifan TIAN ; Yingxin ZHANG ; Yaru YANG ; Zhongyan WANG ; Meng ZHANG ; Xiaoxie LIU ; Yanyan YANG ; Bin ZENG ; Mouwang ZHOU ; Yuxiao XIE ; Guangxu XU ; Jiejiao ZHENG ; Mingsheng ZHANG ; Xiangming YE ; Fubiao HUANG ; Qiuchen HUANG ; Yiji WANG ; Di CHEN ; Zhuoying QIU
Chinese Journal of Rehabilitation Theory and Practice 2025;31(1):55-66
ObjectiveTo explore the standardization of inpatient rehabilitation medical record summary sheet, encompassing its structure, content and data standards, to enhance the standardization level of inpatient rehabilitation medical record summary sheet, improve data reporting quality, and provide accurate data support for medical insurance payment, hospital performance evaluation, and rehabilitation discipline evaluation. MethodsBased on the relevant specifications of the National Health Commission's Basic Norms for Medical Record Writing, Specifications for Sharing Documents of Electronic Medical Records, and Quality Management and Control Indicators for Inpatient Medical Record Summary Sheet (2016 Edition), this study analyzed the structure and content of the inpatient rehabilitation medical record summary sheet. The study systematically applied the three major reference classifications of the World Health Organization Family of International Classifications, International Classification of Diseases (ICD-10/ICD-11, ICD-9-CM-3), International Classification of Functioning, Disability and Health (ICF), and International Classification of Health Interventions (ICHI Beta-3), for disease diagnosis, functional description and assessment, and rehabilitation intervention, forming a standardized terminology system and coding methods. ResultsThe inpatient rehabilitation medical record summary sheet covered four major sections: inpatient information, hospitalization information, diagnosis and treatment information, and cost information. ICD-10/ICD-11 were the standards and coding tools for admission and discharge diagnoses in the inpatient rehabilitation medical record summary sheet. The three functional assessment tools recommended by ICD-11, the 36-item version of World Health Organization Disability Assessment Schedule 2.0, Brief Model Disability Survey and Generic Functioning domains, as well as ICF, were used for rehabilitation functioning assessment and the coding of outcomes. ICHI Beta-3 and ICD-9-CM-3 were used for coding surgical procedures and operations in the medical record summary sheet, and also for coding rehabilitation intervention items. ConclusionThe inpatient rehabilitation medical record summary sheet is a summary of the relevant content of the rehabilitation medical record and a tool for reporting inpatient rehabilitation data. It needs to be refined and optimized according to the characteristics of rehabilitation, with necessary data supplemented. The application of ICD-11/ICD-10, ICF and ICHI Beta-3/ICD-9-CM-3 classification standards would comprehensively promote the accuracy of inpatient diagnosis of diseases and functions. Based on ICD-11 and ICF, relevant functional assessment result data would be added, and ICHI Beta-3/ICD-9-CM-3 should be used to code rehabilitation interventions. Improving the quality of rehabilitation medical records and inpatient rehabilitation medical record summary sheet is an important part of rehabilitation quality control, and also lays an evidence-based data foundation for the analysis and application of inpatient rehabilitation medical record summary sheet.
7.Quality Evaluation of Lycii Cortex and Roasted Lycii Cortex Based on Fingerprint and Content Determination
Yihuan WU ; Wenli ZENG ; Xuemei QIN ; Zongxin SHI ; Chengcheng HUANG ; Yuntao DAI
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(2):165-172
ObjectiveTo establish fingerprint profiles and a quantitative determination method for Lycii Cortex, providing a scientific basis for the formulation of quality standards for Lycii Cortex and its roasted products. MethodsHigh performance liquid chromatography(HPLC) was developed for the quantitative method for determining kukoamine B in Lycii Cortex and its roasted products on an Alphasil XD-C18 CH column(4.6 mm×250 mm, 5 μm). HPLC fingerprint profiles were established for 10 batches of Lycii Cortex and its roasted products, and ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS) was used to identify the common peaks based on reference standards, literature and MS information. Quality evaluation indicators included yield of decoction pieces, appearance properties, content of kukoamine B, and fingerprint profiles. The temperature and time of the roasting process were investigated to select the optimal preparation process, which was then verified. Additionally, chemical pattern recognition was combined to assess the differences in the chemical composition of Lycii Cortex before and after roasting, as well as among samples from different origins. ResultsQuantitative analysis indicated that the contents of kukoamine B in Lycii Cortex and its roasted products were 0.35%-5.51% and 0.24%-4.15%, respectively. The transfer rate of kukoamine B was 58.6%-78.9% after roasting. The fingerprint profile analysis demonstrated that the method established in this study effectively separated kukoamine B from other components in the samples and distinctly differentiated it from its impurity peak, cis-N-caffeoylputrescine. The HPLC fingerprint profiles of Lycii Cortex and its roasted products showed high similarity(all above 0.95), with 7 common peaks identified and five common components, including kukoamine B, cis-N-caffeoylputrescine, N-coumaroyl tyramine, feruloyltyramine, and glucosyringic acid, confirmed. Process optimization confirmed that baking at 110 ℃ for 20 min was a stable and feasible method for roasting Lycii Cortex. Principal component analysis and cluster analysis showed that there was little difference in the chemical composition between raw and roasted Lycii Cortex, but the quality of Lycii Cortex from different origins differed greatly. ConclusionThis study successfully established the fingerprint profiles and a quantitative method for the effective component kukoamine B in Lycii Cortex and roasted Lycii Cortex. The qualitative and quantitative analyses clarified that the impact of the roasting process on the chemical composition of Lycii Cortex was less significant than the variations due to its geographical origin. The findings of this study offer a reference for the development of quality evaluation methods and the establishment of quality standards for Lycii Cortex and its processed products.
8.Study on the mechanism of Danggui buxue decoction regulating neutrophil extracellular traps to improve osteo-porosis in rats with premature ovarian failure
Chuiqiao HUANG ; Shuai CHEN ; Qian LI ; Liancheng GUAN ; Jie GAO ; Zhong QIN ; Yunzhi CHEN
China Pharmacy 2025;36(6):655-660
OBJECTIVE To investigate the mechanism through which Danggui buxue decoction regulates neutrophil extracellular traps (NETs) to improve osteoporosis (OP) in rats with premature ovarian failure (POF). METHODS Female SD rats were randomly divided into normal group, model group, calcitriol group, and Danggui buxue decoction low-dose, medium-dose and high-dose groups, with 9 rats in each group. Except for the normal group, all other groups were administered cisplatin via intraperitoneal injection on days 1 and 8 to establish a POF complicated with OP model. Each group received the corresponding drugs or normal saline intragastrically starting from day 5, once a day, for 4 consecutive weeks. After the last medication, serum levels of estradiol (E2), NETs, 25-hydroxyvitamin D3 [25(OH)D3], receptor activator of nuclear factor-κB ligand (RANKL), and osteocalcin (BGP) were measured. The histopathological changes in bone tissue were observed. The expressions of vitamin D receptor (VDR), myeloperoxidase (MPO), neutrophil elastase (NE) and citrullinated histone H3 (CitH3) in bone tissue were detected; the protein expressions of 25-hydroxyvitamin D-1α-hydroxylase (CYP27B1) and 1α,25-dihydroxyvitamin D3-24-hydroxylase (CYP24A1) were also determined. RESULTS Compared with the normal group, the bone tissue of rats in the model group showed a significant reduction in the number of trabeculae, which was thinner broken and poorly connected, with significant destruction of the reticular structure, and an enlarged marrow cavity. Serum levels of NETs and RANKL, the protein expressions of MPO, NE, CitH3 and CYP24A1 in bone tissue were significantly increased or upregulated, while serum levels of E2, 25(OH)D3 and BGP as well as protein expressions of VDR and CYP27B1 were significantly decreased or downregulated (P<0.05). Compared with the model group, the histopathological changes in the bone tissue of rats in each administration group showed some degree of recovery, with significant improvements observed in most quantitative indicators (P<0.05). CONCLUSIONS Danggui buxue decoction can restore the E2 level in POF complicated with OP rats, and improve OP. The mechanism may be related to its ability to upregulate VD level and inhibit the formation of NETs.
9.Color Space Method Combined with Chemometrics to Determine Processing Degree of Angelicae Sinensis Radix Carbonisata
Liuying QIN ; Yao HUANG ; Lifan GAN ; Yuanjun LIU ; Congyou DENG ; Dongmei SUN ; Lijin LIANG ; Lin ZHOU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(9):201-210
ObjectiveTo study the changing law of appearance color and physicochemical properties of Angelicae Sinensis Radix Carbonisata(ASRC) during the processing by color space method combined with statistical analysis, so as to provide reference for determining the processing endpoint and evaluating the quality of the decoction pieces. MethodsTaking processing time(4, 8, 12, 16 min) and temperature(180, 200, 220, 240 ℃) as factors, ASRC decoction pieces with different processing degrees were prepared in a completely randomized design. Then, the brightness value(L*), red-green value(a*), yellow-blue value(b*), and total chromaticity value (E*ab) of the decoction pieces were determined by spectrophotometer, the color difference value(ΔE) was calculated, and the data of colorimetric values were analyzed by discriminant analysis. At the same time, the pH, charcoal adsorption, and contents of tannins, 5-hydroxymethylfurfural(5-HMF), tryptophan, chlorogenic acid, ferulic acid, senkyunolide I, senkyunolide H and ligustilide of ASRC with different processing degrees were determined by pH meter, ultraviolet and visible spectrophotometry and ultra-high performance liquid chromatography(UPLC). Principal component analysis(PCA) was used to analyze the data of physicochemical indexes, after determining the processing technology of ASRC, the canonical discriminant function was established to distinguish the decoction pieces with different processing degrees, and leave-one-out cross validation was conducted. Finally, Pearson correlation analysis was used to explore the correlation between various physicochemical indexes and chromaticity values. ResultsWith the prolongation of the processing time, L*, a*, b* and E*ab all showed a decreasing trend, and the established discriminant model based on color parameters was able to distinguish ASRC with different processing degrees. The pH showed an increasing trend with the prolongation of processing time, and the charcoal adsorption, and the contents of tannins, 5-HMF, and tryptophan all showed an increasing and then decreasing trend. Among them, the charcoal adsorption, contents of tannin and 5-HMF reached their maximum values successively after processing for 8-12 min. While the contents of chlorogenic acid, ferulic acid, senkyunolide I, senkyunolide H and ligustilide decreased with the increase of processing time, with a decrease of 60%-80% at 8 min of processing. Therefore, the optimal processing time should be determined to be 8-12 min. PCA could clearly distinguish ASRC with different processing degrees, while temperature had no significant effect on the processing degree. The 12 batches of process validation results(10 min, 180-240 ℃) showed that except for 3 batches identified as class Ⅱ light charcoal, all other batches were identified as class Ⅲ standard charcoal, and the chromaticity values of each batch of ASRC were within the reference range of class Ⅱ-Ⅲ sample chromaticity values. The correlation analysis showed that the chromaticity values were negatively correlated with pH and charcoal adsorption, and positively correlated with contents of tryptophan, chlorogenic acid, ferulic acid, senkyunolide I, senkyunolide H, and ligustilide. And both pH and charcoal adsorption were negatively correlated with the contents of the above components, but the charcoal adsorption was positively correlated with the content of 5-HMF. ConclusionThe chromaticity values and the contents of various physicochemical indicators of ASRC undergo significant changes with the prolongation of processing time, and there is a general correlation between chromaticity values and various physicochemical indicators. Based on the changes in color and physicochemical indicators, the optimal processing time for ASRC is determined to be 8-12 min. This study reveals the dynamic changes of the relevant indexes in the processing of ASRC, which can provide a reference for the discrimination of the processing degree and the quantitative study of the processing endpoint.
10.Effects of postnatal cadmium exposure on physical and pubertal development in children: a systematic review and Meta analysis
HUANG Tianwenjing, PENG Zeqin, LIU Qin
Chinese Journal of School Health 2025;46(3):396-401
Objective:
To systematically evaluate the effects of postnatal cadmium exposure on children s pubertal and physical development, so as to provide reference for the latter research on cadmium exposure.
Methods:
A computer search of PubMed, EBSCO, Web of Science, OVID, CNKI, WanFang, VIP and CBM database were conducted to collect relevant studies, and the search period was from the time of database construction to 27 February 2024. Two reviewers independently screened the literature, extracted data and evaluated the risk of bias of the included studies, and used GRADE to assess the certainty of the evidence for each outcome. Meta analysis of the risk ratio (HR) for the occurrence of menarche was performed using Stata 17.0 software, and the results were summarized qualitatively for other indicators.
Results:
A total of 6 cohort studies were included, comprising four pubertal development and two physical development studies with a total of 2 899 children. Studies of cadmium exposure and menarche in girls all found that late menarche in children with higher urinary cadmium concentrations ( HR=0.86, 95%CI=0.74-0.99, P < 0.05 ; 3 studies; moderate certainty evidence), and one of these studies found no statistically significant effect of cadmium exposure on breast and pubic hair development in children ( aOR=0.90, 95%CI =0.72-1.14; aOR=0.85, 95%CI=0.64-1.13, P >0.05; low quality evidence); the only study testicular volume, external genitalia and pubic hair development in boys found on effects of urinary cadmium exposure on pubertal development ( aOR=0.76, 95%CI =0.50-1.15; aOR=1.07, 95%CI =0.79-1.45; aOR= 0.79 , 95%CI=0.51-1.23, P >0.05; low certainty evidence). Regarding the effects of cadmium exposure on children s height and weight (2 studies, low certainty evidence), the results of one study showed that cadmium exposure was negatively associated with children s physical growth (multivariable adjusted attributable differences in height and weight study, being -1.60 cm, 95% CI = -2.40 to -0.77 cm; and -0.57 kg, 95% CI =-0.88 to -0.26 kg, P <0.05), while the other showed no effect of cadmium exposure on children s height and weight ( F= 1.35 ,1.76, P >0.05), but a negative effect on head and chest circumference ( F=3.43, 4.50, P <0.05; low certainty evidence).
Conclusion
Cadmium exposure in childhood causes delayed menarche in girls and affects physical growth to some extent.


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