ABSTRACT
@#Age-related macular degeneration(ARMD)is a major cause of irreversible loss of central vision in the elderly. Typical characteristics of ARMD consist of retinal pigment epithelium(RPE), degenerative changes of choroidal capillaries and vitreous warts in macular area. Clinical ARMD is divided into two subtypes: non effusive(dry or atrophic)and effusive(wet or neovascular). The occurrence of the disease is the result of the interaction of many factors, such as age, environment, heredity, smoking, oxidative stress and cardiovascular dysfunction, <i>etc</i>. In view of the important role of RPE cells in pathogenesis of ARMD, the effects and possible mechanisms of blue light, smoking, oxidative stress, lipofuscin accumulation, chronic inflammation and protein homeostasis on the onset of dry ARMD are summarized by focusing on RPE cells. This will provide new ideas to help understand and prevent the occurrence of dry ARMD.
ABSTRACT
Cantharidin poisoning has been proven to cause multiple organ damage. Acute circulatory failure, acute renal failure, and multiple organ failure resulting from cantharidin poisoning are the main causes of death for patients with cantharidin poisoning. However, research on the damage of main target organs and mechanism of cantharidin poisoning is not clear. This paper reviews the latest toxicological and pathological research literatures at home and abroad related to cantharidin poisoning and comprehensively summarizes the latest research progress on the toxicological and pathological damage and mechanism of the digestive system, circulatory system, respiratory system, urinary system, reproductive system, skin mucosa, immune system, and nervous system after cantharidin poisoning, to provide reference for improving the molecular toxicological mechanism of cantharidin poisoning and decision-making in the clinical intervention of cantharidin poisoning.
Subject(s)
Humans , Cantharidin , PoisoningABSTRACT
Objective To study the mechanism of rib fracture caused by landing on different parts of the trunk using finite element method, and to provide some new techniques and new ideas for the reconstruction of the whole process of falls from height. Methods The finite element method was used to study the rib fracture of human security model THUMS4.0 caused by landing on different parts of the trunk. Then the model was compared with actual cases and the mechanism of rib fracture caused by falls from height was analyzed from a biomechanical point of view. Results There were some differences in the stress and strain distribution as well as the rib fracture sites when different parts touched the ground. Ribs on both sides of the body were fractured when the front of the trunk touched the ground, and the fractures were mainly located in the junction of the ribs and costal cartilage and the midaxillary line area. When the right anterior part of the trunk touched the ground, rib fracture occurred first on the side that touched the ground, and rib fractures were mainly located in the area from the right midaxillary line to the posterior axillary line, and junction of ribs on both sides and costal cartilage. When the back of the trunk touched the ground, the fracture sites were mainly located on the back of the ribs on both sides. When the right posterior part of the trunk touched the ground, multiple rib fractures were likely to occur in the parts that touched the ground. The plastic strains were mainly concentrated at the fracture sites, while the von Mises stresses were not only concentrated at the fracture sites, but also at other sites. Conclusion There are some differences in rib fracture location sites and injury mechanisms when different parts of the trunk touch the ground.
Subject(s)
Humans , Accidental Falls , Biomechanical Phenomena , Finite Element Analysis , Rib Fractures/etiology , Ribs , TorsoABSTRACT
This paper summarizes the research progress of reproductive toxicity of Tripterygium wilfordii from 1979,and the toxicity characterization,damage mechanism,and attenuated measures are summarized. It was found that,the reproductive toxicity caused by T. wilfordii is mainly distributed on components of Tripterygium glycosides,triptolide,tripchlorolide,and clinically preparations,such as Leigongteng Tablets and Tripterygium Glycosides Tablets. Adverse reactions to male reproductive system caused by Tripterygium preparations mainly include decreased sperm motility,oligospermia or spermatozoa,decreased fertility or infertility,etc. Long-term drug use may also lead to testicular atrophy and decreased sexual desire. Adverse reactions to women are mainly manifested as menstrual disorders,decreased menstrual volume or even amenorrhea,decreased sexual desire,infertility,etc. The reproductive toxicity of T. wilfordii is related to apoptosis of reproductive cells,disturbance of spermatogenesis or oogenesis,damage of testis and ovary in reproductive target tissues,and changes of internal environment in gonad tissues( hormones,hormone synthesis rate-limiting enzymes and energy metabolism). Drug compatibility,hormone replacement,medication duration and dosage form changes can help reduce the damage of T. wilfordii to the reproductive system. In addition,in view of the existing problems in the current study,the author proposes new directions in clinical studies,pharmacological metabolism mechanism,preparation quality standards and new therapeutic effects,etc.,to provide a basis for the safe and reasonable clinical application of T. wilfordii.
Subject(s)
Female , Humans , Male , Drugs, Chinese Herbal , Toxicity , Genitalia , Ovary , Testis , Tripterygium , ToxicityABSTRACT
Objective To provide theoretical basis for the rational use of drugs in clinic, the biochemical characteristics of liver injury induced by Atorvastatin Combined with HRZ (Isoniazid Rifampicin and Pyrazinamide) were analyzed in animal model. Me thods Eighty 8 week old SPF SD rats with half males and females were divided into four groups: control group, atorvastatin group, HRZ group, atorvastatin+HRZ group. According to the human mouse drug dose conversion, mice were given corresponding drugs by gavage.Hepatic function index of rats (the Total bilirubin, Direct bilirubin, Indirect bilirubin, Aspartate aminotransferase, Alanine aminotransferase, Alkaline phosphatase) were detected by blood from the femoral artery and hepatic function index of rats in each group on 10 d, 20 d, 40 d.Re s ults There were significant difference in the anmmistrated group on 10, 20, 40 days with higher TBIL, DBIL, IBIL than that in control group; in the admimistrated group on Day 10, combined treatment group was higher than that in cotrol group and there were significant differences in ALT;in the process of treatmen, there was statistical difference; ALP was administered for 20 days and the 40 day, atorvastatin there was HRZ group was statistically different in groupHRZ, severe injury, combination group compared with HRZ group had statistically significant difference. Conclus ions The liver injury in the three experimental groups is mild and moderate, and the liver damage is mainly cholestasis type. The most severe hepatic injury caused by Atorvastatin Combined with HRZ is aggravated by the prolonged use of drugs.
ABSTRACT
The talus fracture is a rare kind of fracture in clinical work in the department of orthopedics due to the special structure of the talus.It is usually caused by high altitude falling accidents and serious violence,etc.Associated with the economic development,the talus fracture cases are found with increasing trend caused by serious traffic and building accidents.In this review,we will summarize the main progresses contributed to knowledge of anatomy and blood supply,damage mechanism and classification,and especially the diagnosis and treatment of talus fracture.