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@#With the increasing popularity of dental implants, prevalence of peri-implantitishas also been increasing in recent years. However, a deeper understanding of the pathogenesis of peri-implantitis is still lacking. Animal models are a good bridge for studying the pathogenesis of clinical diseases. Animals such as mini-pigs, canines, non-human primates and rodents are used to construct animal models of peri-implantitis. Among them, rodents are easy to obtain and feed, and have a wide range of applications for research. In this review, we summarize the construction of rodent modelswithperi-implantitis as well as the research progress and applications.
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OBJECTIVE@#To improve the rat model of cervical spondylosis of vertebral artery type (CSA) induced by injecting sclerosing agent. To evaluate the efficacy of injecting sclerosing agent to induce CSA.@*METHODS@#Forty Health SPF SD rats(20 males and 20 females), were randomly divided into two groups:the model group (20) and the blank group (20). All the animals were followed up for 4 weeks for the observation of general situation, transcranial Doppler(TCD) detection of blood flow velocity, pulsatility index and resistive index of the vertebral artery, measurement of mental distress by open-field test.@*RESULTS@#One to two days after establish the animal model, rats in the model group appeared apathetic with decreased autonomic activities, trembling, squinting, increased eye excrement, etc., and no rats died during the experiment. The mean blood flow velocity of the model group was lower than that of the blank group (P<0.05), and the pulsatilit index and resistive index of the model group were higher than that of the blank group (P<0.05). The mental distress of the model group was significantly higher than that of the blank group.@*CONCLUSION@#The modified injection of sclerosing agent is a practical method to establish the rat model of CSA, with high success rate, high stability, low mortality and simple operation.
Subject(s)
Male , Animals , Female , Rats , Sclerotherapy , Sclerosing Solutions/therapeutic use , Rats, Sprague-Dawley , Spondylosis/therapy , Spine , Vertebral ArteryABSTRACT
Oligozoospermia and asthenospermia are common causes of clinical male infertility. The number of patients increases year by year and shows a younger trend. Its etiology is complex， the mechanism and unclear pathogenesis and rely on empirical therapy. Therefore， it is necessary for exploring the pathogenesis and developing corresponding drugs to establish reasonable animal models. By comparing different animal model making methods， this paper provides ideas for constructing a more standardized animal model of oligoasthenospermia. At the moment， a lot of molding methods for oligoasthenospermia are available. Combined with the animal experimental articles of oligoasthenospermia in recent years， this study described the modeling with adenine， ornidazole， tripterygium glycoside， hydrocortisone， cyclophosphamide， busulfan， paclitaxel， heat stress， ionizing radiation， high-fat diet， and gene knockout， respectively， and compared the modeling methods in terms of the time， indexes， animal line， and model evaluation. Thereby， the advantages and disadvantages of different models of oligoasthenospermia were summarized， and finds that the existing animal models of oligoasthenospermia still have many shortcomings that need to be further improved. The selection， standardization and innovation of animal models need to be solved urgently， and the coincidence between animal models and clinical patients' traditional Chinese medicine syndromes is not coincident. In view of the existing problems， we should further explore how to build a modeling method in line with clinical characteristics and syndrome types， select the compound model method of integrated traditional Chinese and Western medicine， copy the model closer to the law of disease development and in line with traditional Chinese medicine syndrome， and provide animal experimental support for exploring the mechanism of disease， developing characteristic drugs and guiding clinical medication.
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Benign prostatic hyperplasia （BPH） model， as a carrier of BPH， is vital for exploring the pathogenesis of the disease and evaluating the efficacy of corresponding drugs. This paper reviewed the in vivo and in vitro models of BPH， the modeling principles and methods， and evaluation indicators， and analyzed the advantages and disadvantages of different types of models. At present， the BPH model is getting closer to the clinical characteristics of human BPH， providing powerful support for the evaluation of drug efficacy. Furthermore， the model has been developed towards cytology to allow further research on the pathogenesis of BPH. The relevant testing indicators reflect the core pathological changes of BPH from different levels， providing a guarantee for further exploring the pathogenesis of BPH and the development of prevention and control drugs. However， no model can fully simulate the natural development process of human BPH， and each model and evaluation criterion has its unique advantages and limitations. In terms of model evaluation， most BPH models are assessed based on benign prostate enlargement （BPE）， and there is still a lack of reliable models to simulate BPH progression and combine with bladder dysfunction. In terms of indicator evaluation， symptom-reflected behavioral indicators are absent in the replication of BPH models in animals. The study of the BPH model in traditional Chinese medicine （TCM） only focuses on the replication and investigation of the "disease" model， rather than the "syndromes" and "signs"， which cannot simulate the syndrome differentiation and treatment under the guidance of the TCM theory. In view of the above deficiencies， we should further improve the modeling method based on clinical characteristics， explore the multifactor composite models， especially those of disease-syndrome combination suitable for basic research of TCM， replicate the model closing to disease development， and optimize the evaluation indicators， which is of great theoretical and practical significance to develop drugs for effective prevention and control of BPH.
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Constipation is a common functional gastrointestinal disease with obstructive constipation， prolonged defecation time， or difficulty in defecation as the main symptoms， its prevalence is increasing year by year. Copying the animal model that is highly consistent with the clinical characteristics of traditional Chinese medicine （TCM） and western medicine is the basis for the related research on constipation. Based on the clinical characteristics， etiology and pathogenesis， clinical diagnostic criteria and TCM syndrome differentiation of constipation， a comparative analysis of the anastomosis between common animal models and clinical symptoms was carried out. Existing animal models of constipation were mostly drug induction and non-pharmaceutical intervention methods， and the modeling method was relatively simple， which was different from the multi-factors of constipation in clinical practice， and the evaluation indicators were mainly charcoal-powder propelling rate， defecation function， colon tissue and serum biochemical indicators. TCM syndrome differentiation lacked perfect evaluation system， such as laborious defecation， palpitation， shortness of breath， forgetfulness， cold pain in the abdomen， and other indicators that had not been embodied in the animal models， and the observation indicators were inconsistent with the diagnostic criteria of TCM. The same pathogenic factor could cause different syndromes， such as shortness of breath and fatigue， hot flashes and night sweats in the diagnostic criteria of TCM. Therefore， it is necessary to further explore the animal model of constipation that is highly consistent with the clinical characteristics of TCM and western medicine， in order to promote clinical treatment of constipation.
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Acute liver failure is a serious and complex liver disease with a high short-term mortality rate. Its pathogenesis remains unknown and there is still a lack of effective drugs. Animal models play an important role in further revealing the pathogenesis of acute liver failure and the therapeutic mechanism of drugs, and the selection of experimental animals and preparation methods is the key to the effective implementation of research. This article summarizes the commonly used and new animal models of acute liver failure in recent years and the corresponding preparation methods and divides the animal models of acute liver failure into following four categories: chemical drug model, surgical model, infection model, and other models. Meanwhile, the above models are evaluated based on Terblanche and Hickman evaluation criteria for liver failure models, hoping to provide a reference for model selection and evaluation in basic research on this disease.
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Cancer-related fatigue (CRF) is a common symptom which associated with cancer itself or cancer treatments. CRF will not only interrupt the patient's treatment, but also affect the patient's quality of life seriously. To date, the pathogenesis of CRF is still unclear, and recognized effective treatment is lacking. It is the precondition of establishing standardized animal models for CRF to find effective treatments. This paper summarizes the animal model of CRF in order to find suitable methods, and distinguish the effects of different interventions.
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The study of traditional Chinese medicine(TCM) syndrome model started late but developed rapidly. In recent years, with the deepening of the study of TCM diseases and prescriptions, to develop the modernization of TCM, the study of TCM syndrome model has been required to be more specific and went deeper. Qi deficiency and blood stasis syndrome, as a common clinical syndrome type, often occurs in cardiovascular and cerebrovascular diseases, digestive system diseases, chronic kidney disease, cancer and other diseases. With the increase in the aging of population in China, the research on Qi deficiency and blood stasis syndrome has become a hot topic in the field of TCM due to the physical characteristics of the elderly people with multiple Qi deficiency and blood stasis. The animal models of Qi deficiency and blood stasis syndrome established in recent years were classified into pathological model, etiological model and combined disease and syndrome model. By observing the macroscopical representation, limb behavior and hemorheology of experimental animals in line with the theory of TCM, this paper evaluates the method of modeling, and provides ideas and reference for the method of modeling for Qi-deficiency and blood-stasis syndrome. The research on the model of Qi-deficiency and blood-stasis syndrome should follow the thought of cause-pulse-syndrome-treatment, namely etiology-external manifestation-pathological mechanism-syndrome differentiation and treatment, and combine the study on the TCM syndrome model with modern science, so as to standardize the development of modeling methods and build relatively improved animal models of Qi deficiency and blood stasis, and provide model support for exploring the pathogenesis of Qi deficiency and blood stasis syndrome and new treatment ideas in the future.
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Alzheimer∗ s disease (AD) is a typical central nervous degenerative disease characterized by progressive cognitive impairment and behavioral damage, which is associated with the major pathological manifestations of extracellular amyloid deposition, intracellular neurofibrillary tangles, and neuron loss. Mild cognitive impairment ( MCI) is a kind of cognitive impairment status between normal cognition and AD, which is linked with a high risk of converting into AD. Previous studies mostly establish the animal models with clinical AD characteristics for mechanism research, drug screening, and new drug development. In recent years, researchers have attempted to establish animal models with clinical MCI characteristics, trying to intervene ear-ly at MCI stage to effectively prevent the occurrence of AD. There are many types of AD experimental animal models, and the MCI model should be distinguished from the AD model. Based on the systematic introduction of the characteristics of AD and MCI, this study aims to preliminarily evaluate the commonly used AD and MCI experimental animal models, providing sug-gestions for the research of AD and MCI.
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Objective: The potency of multi-source information fusion technology was explored to improve the model calibration and prediction performance of Chinese medicine extraction process. Methods: The ethanol extraction process for isolating fat-soluble components from Salvia miltiorrhiza was taken as the research carrier. S. miltiorrhiza from different sources were collected to simulate the fluctuation of materials. The changes of process parameters were simulated by design of experimental (DOE), and the process near infrared spectra (NIRS) were used as the process state variables. The contents of tanshinone IIA, cryptotanshinone, and tanshinone I were determined by HPLC. The raw material properties, process parameters and process state variables were combined as independent variables. The content of effective components in the extract was taken as the dependent variable. The partial least squares (PLS) algorithm was used to establish the quality prediction model of the extracts. Results: The modeling results respectively showed that the RMSECV was 0.172 8 mg/g, RMSEP was 0.031 7 mg/g, RPD was 6.91 (tanshinone IIA); RMSECV was 0.153 4 mg/g, RMSEP was 0.024 2 mg/g, RPD was 4.02 (cryptotanshinone); RMSECV was 0.117 1 mg/g, RMSEP was 0.043 2 mg/g, RPD was 4.76 (tanshinone I). Conclusion: The calibration and prediction performance of multi-source information fusion model are better than the conventional model, which can effectively improve the quality predictability and controllability of S. miltiorrhiza extract.
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Objective:To investigate the differences in related indices of ulcerative colitis (UC) respectively induced by free drinking and intragastric administration of dextran sodium sulfate (DSS) in mice to provide experimental reference for the optimization of UC model.Methods:Totally 30 C57BL/6 mice were randomly divided into the normal control group,free drinking group and intragastric administration group with 10 ones in each.The mice drank water freely with free drinking or intragastric administration of 3% DSS solution at the dose of 4 g·kg-1·day-1 for 7 days to establish the UC model.The differences in disease activity index (DAI),histological damage sore and activity of myeloperoxidase (MPO) among the groups were compared.Results:Two mice died during the experiment in the free drinking group,and DAI of survival mice was (8.8±1.6).There was no death of mice in intragastric administration group,and DAI was (9.0±0.8),and there was no significant difference in DAI between the groups (P>0.05),while the coefficient of variation in the free drinking group was higher than that in the intragastric administration group (18.7 vs 8.6).The colonic histological damage score of the free drinking group and the intragastric administration group was 24.8±4.2 and 27.0±2.8,respectively,which was typical inflammatory change with no significant difference (P>0.05),while the coefficient of variation of the free drinking group was higher than that of the intragastric administration group (16.9 vs 10.4).MPO of the normal control group,free drinking group and intragastric administration group was (0.41±0.03),(2.32±0.34) and (2.05±0.18) U·g-1,respectively.Compared with the normal control group,significant difference in MPO was shown in the free drinking group and the intragastric administration group (P0.05),and the coefficient of variation in the free drinking group was higher than that in the intragastric administration group (14.7 vs 8.8).Conclusion:Both free drinking and intragastric administration of DSS can successfully induce the UC model in mice.Compared with the free drinking group,the intragastric administration group has low mortality rate and low coefficient of variation.Therefore,intragastric administration has more advantages than free drinking in inducing the UC model in mice.
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Objective To compare and evaluate the methods of building model of cervical spondylosis of vertebral artery type (CSA)rats by measuring the learning and memory ability,anxiety and depression,and degree of nervous tension of three kinds of CSA model rats.Methods We randomly divided 120 rats into mixed modeling group,bone graft compression modeling group,mechanical balance disorder modeling group,and blank control group with 30 rats in each.Morris water maze,elevated plus maze test and open field test were used to detect and compare the rats’abilities of learning and memory,anxiety and depression,and degree of nervous tension.We then evaluated the three CSA rat models.Results Compared with those in the blank group,the learning and memory abilities in the mixed modeling, bone graft compression and mechanical balance disorder modeling rats were significantly decreased,the anxiety and depression and degree of nervous tension were significantly increased (P<0.05).Compared with bone graft compression and mechanical balance disorder modeling groups,the mixed modeling group could restore the characteristics of CSA.Conclusion The three kinds of modeling methods can successfully reproduce the CSA animal model;the mixed modeling is superior and thus worthy of promotion.
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Modeling biosecurity events based on mathematical theories to reveal the inherent mechanism can shed light on the development of biosecurity events and offer accurate scientific support to emergency preparation and response , con-tributing much to national biodefense capability .This paper reviews the applications of mathematical theories as a research and analytic tool in biosecurity and discusses the trends of development in this field .
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Intervening animals by pathogen of traditional Chinese medicine (TCM) to establish animal model is the most common and easiest method to determine syndrome attribute of an animal model. However, the underlying prob-lem of this modeling method is that the concept of wind, cold and dampness in the nature are confused with the syn-drome of wind-cold-dampness summarized by abnormal appearance of clinical patients. The typical animal model establishment are through the methods of wind blowing, low temperature freezing, cold water immersion, environmen-tal humidity increasing. Modern medical modeling methods, such as chemicals, organ resections, are also used in the establishment of animal models. Then, the syndrome-attribution of modeling animal is evaluated by physicochemical indexes of modern medicine which is one of modeling methods that have been used by academia in early times. But animal model established by this method is a kind of disease model which is lack of sufficient theoretical and clini-cal evidences. Therefore, the syndrome-attribution should be reappraised among this kind of animal models.
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Pesquisas sobre as pescarias amazônicas apresentam problemas nas coletas de dados que impedem ou restringem as respostas resultantes da modelagem. Este trabalho tem como objetivo propor um protocolo de pesquisa, discriminando as principais variáveis necessárias à construção de modelos para analisar a pesca na região.
Research on amazonian fisheries presents problems in data collection that impedes or restricts resultant answers from modeling. This work proposes a protocol of research, that differentiates the principal variables necessary for constructing models to evaluate fishing in the region.