Neurological diseases include a variety of neurodegenerative diseases and other brain damage diseases.The treatment schemes for neurological diseases are still in research.The existing clinical and basic studies have confirmed that traditional estrogen therapy has certain protective effect on the nervous system,while it increases the risk of breast or endometrial cancer.The emergence of the selective estrogen receptor modulators (SERMs) can avoid the above mentioned problems.The available studies have confirmed the protective effect of tamoxifen as a SERM on the nervous system.This paper reviews the role and functioning mechanisms of tamoxifen in the nervous system and cognitive function,aiming to provide guidance for the future application of tamoxifen in the treatment of neurological diseases and the improvement of cognitive function.
Tamoxifen/therapeutic use* ; Selective Estrogen Receptor Modulators/therapeutic use* ; Cognition ; Nervous System

Objective: To compare the effect of different endocrine therapy drugs on liver function in patients with early breast cancer. Methods: A retrospective cohort study was conducted to include 4 318 patients with early breast cancer who received adjuvant endocrine therapy in Department of Breast Surgery, Peking Union Medical College Hospital from January 1, 2013 to December 31, 2021. All the patients were female, aged (51.2±11.3) years (range: 20 to 87 years), including 1 182 patients in the anastrozole group, 592 patients in the letrozole group, 332 patients in the exemestane group, and 2 212 patients in the toremifene group. The mixed effect model was used to analyze and compare the liver function levels of patients at baseline, 6, 12, 18, 24, 36, 48, 60 months of medication, and 1 year after drug withdrawal among the three aromatase inhibitors (anastrozole, letrozole, exemestane) and toremifene. Results: ALT and AST of the 4 groups were significantly higher than the baseline level at 6 months (all P<0.01), and there were no significant differences in total bilirubin, direct bilirubin and AST levels among all groups one year after drug withdrawal (P: 0.538, 0.718, 0.061, respectively). There was no significant difference in the effect of all groups on AST levels (F=2.474, P=0.061), and in the effect of three aromatase inhibitors (anastrozole, letrozole, and exemestane) on ALT levels (anastrozole vs. letrozole, P=0.182; anastrozole vs. exemestane, P=0.535; letrozole vs. exemestane, P=0.862). Anastrozole and letrozole had significantly higher effects on ALT levels than toremifene (P<0.01, P=0.009). The proportion of abnormal liver function in each group increased significantly at 6 months compared with baseline, and then the proportion showed a decreasing trend over time. Conclusions: Three aromatase inhibitors (anastrozole, letrozole, and exemestane) and toremifene can significantly increase the level of ALT and AST in patients with breast cancer, and the levels can gradually recover to the baseline after 1 year of drug withdrawal. The effect of non-steroidal aromatase inhibitors (anastrozole, letrozole) on ALT levels is greater than toremifene.
Female ; Humans ; Anastrozole ; Aromatase Inhibitors/therapeutic use* ; Bilirubin ; Breast Neoplasms/drug therapy* ; Letrozole ; Liver ; Retrospective Studies ; Toremifene ; Young Adult ; Adult ; Middle Aged ; Aged ; Aged, 80 and over

To investigate the formation of polystyrene nanoplastic-plant protein corona and its potential impact on plants, three differently modified polystyrene nanoplastics with an average particle size of 200 nm were taken to interact with the leaf proteins of Impatiens hawkeri for 2 h, 4 h, 8 h, 16 h, 24 h, and 36 h, respectively. The morphological changes were observed by scanning electron microscopy (SEM), the surface roughness was determined by atomic force microscopy (AFM), the hydrated particle size and zeta potential were determined by nanoparticle size and zeta potential analyzer, and the protein composition of the protein corona was identified by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The proteins were classified in terms of biological processes, cellular components, and molecular functions to study the adsorption selection of nanoplastics to proteins, investigate the formation and characteristics of polystyrene nanoplastic-plant protein corona and predict the potential impact of protein corona on plants. The results showed that the morphological changes of the nanoplastics became clearer as the reaction time extends, as evidenced by the increase in size and roughness and the enhancement of stability, thus demonstrating the formation of protein corona. In addition, the transformation rate from soft to hard protein corona was basically the same for the three polystyrene nanoplastics in the formation of protein corona with leaf proteins under the same protein concentration conditions. Moreover, in the reaction with leaf proteins, the selective adsorption of the three nanoplastics to proteins with different isoelectric points and molecular weights differed, and the particle size and stability of the final formed protein corona also differed. Since a large portion of the protein fraction in protein corona is involved in photosynthesis, it is hypothesized that the formation of the protein corona may affect photosynthesis in I. hawkeri.
Polystyrenes/chemistry* ; Protein Corona/chemistry* ; Microplastics ; Plant Proteins ; Chromatography, Liquid ; Tandem Mass Spectrometry ; Nanoparticles/chemistry*

Objective: To investigate the protective effect of diallyl sulfide (DAS) , against benzene-induced genetic damage in rat. Methods: In September 2018, Sixty adult male adaptive feeding 5 days, were randomly divided into six groups according to their weight. Control groups, DAS control groups, benzene model groups, benzene+low DAS groups, benzene+middle DAS groups, benzene+High DAS group, 10 in each group. Rats in the DAS and DAS control group were orally given DAS at 40, 80, 160, 160 mg/kg, blank control and benzene model groups were given corn oil in the same volume. 2 h later, the rats in the benzene model and DAS treatment groups were given gavage administration of benzene (1.3 g/kg) mixed with corn oil (50%, V/V) , blank and DAS control groups were given corn oil in the same volume. Once a day, for 4 weeks. Samples were collected for subsequent testing. Results: Compared with the blank control group, In benzene treated rat, peripheral WBC count was reduced 65.06% (P=0.003) , lymphocyte ratiowas reduced (P=0.000) , micronucleus rate was increased (P=0.000) , Mean fluorescent intensity and relative fluorescence intensity of γH2AX in BMCs were increased 32.69%、32.64% (P=0.001、0.008) , Mean fluorescent intensity and relative fluorescence intensity of γH2AX in PBLs were increased 397.70%、396.26% (P=0.000、P=0.003) respectively. Compared with the benzene model group, the WBC count increased respectively (P=0.000、0.003、0.006) and the micronucleus rate decreased (P=0.000、0.000、0.000) in the DAS groups, Mean fluorescent intensity and relative fluorescence intensity ofγH2AX in BMCs were significantly reduced in the high DAS groups (P=0.000、0.000) , Mean fluorescent intensity and relative fluorescence intensity ofγH2AX in PBLs were significantly reduced in the low, middle, high DAS groups (P=0.000、0.000) . Conclusion: DAS can effectively suppress benzene induced genotoxic damage in rats.
4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid/analogs & derivatives* ; Allyl Compounds/pharmacology* ; Animals ; Benzene/toxicity* ; Corn Oil ; DNA Damage ; Male ; Rats ; Sulfides/pharmacology*

OBJECTIVE: This study was designed to provide the evidences on the toxicokinetics of microplastics (MPs) and nanoplastics (NPs) in the bodies of mammals. METHODS: 100 nm, 3 μm, and 10 μm fluorescent polystyrene (PS) beads were administered to mice once by gavage at a dose of 200 mg/kg body weight. The levels and change of fluorescence intensity in samples of blood, subcutaneous fat, perirenal fat, peritesticular fat, cerebrum, cerebellum, testis, and epididymis were measured at 0.5, 1, 2, and 4 h after administration using an IVIS Spectrum small-animal imaging system. Histological examination, confocal laser scanning, and transmission electron microscope were performed to corroborate the findings. RESULTS: After confirming fluorescent dye leaching and impact of pH value, increased levels of fluorescence intensity in blood, all adipose tissues examined, cerebrum, cerebellum, and testis were measured in the 100 nm group, but not in the 3 and 10 μm groups except in the cerebellum and testis at 4 h for the 3 μm PS beads. The presence of PS beads was further corroborated. CONCLUSION After a single oral exposure, NPs are absorbed rapidly in the blood, accumulate in adipose tissues, and penetrate the blood-brain/testis barriers. As expected, the toxicokinetics of MPs is significantly size-dependent in mammals.
Male ; Animals ; Mice ; Microplastics ; Plastics ; Genitalia ; Adipose Tissue ; Polystyrenes/toxicity* ; Nerve Tissue ; Mammals

Biological Products ; Compliance ; Ice ; Incubators ; Methods ; Polyethylene ; Polypropylenes ; Polystyrenes ; Product Packaging ; Refrigeration ; Transportation ; Vaccines

BACKGROUND: Breast cancer treatment with selective estrogen receptor modulators (SERMs) increases the incidence of uterine malignant mixed Müllerian tumors (uMMMTs). We examine clinicopathologic characteristics and prognosis of SERM-associated uMMMTs (S-uMMMTs) and discuss possible pathogenetic mechanisms. METHODS: Among 28,104 patients with breast cancer, clinicopathologic features and incidence of uMMMT were compared between patients who underwent SERM treatment and those who did not. Of 92 uMMMT cases that occurred during the same period, incidence, dose, and duration of SERM treatment, as well as overall survival rate, were compared for patients with breast cancer who underwent SERM treatment and those who did not (S-uMMMT vs NS-uMMMT) and for patients without breast cancer (de novo-uMMMT). Histopathological findings and immunophenotypes for myogenin, desmin, p53, WT-1, estrogen receptor (ER) α, ERβ, progesterone receptor, and GATA-3 were compared between S-uMMMT and de novo-uMMMT. RESULTS: The incidence of S-uMMMT was significantly higher than that of NS-uMMMT (6.35-fold). All patients with SERM were postmenopausal and received daily 20–40 mg SERM. Cumulative SERM dose ranged from 21.9 to 73.0 g (mean, 46.0) over 39–192 months (mean, 107). Clinicopathologic features, such as International Federation of Gynecology and Obstetrics stage and overall survival, were not significantly different between patients with S-uMMMT and NS-uMMMT or between patients with S-uMMMT and de novo-uMMMT. All 11 S-uMMMT cases available for immunostaining exhibited strong overexpression/null expression of p53 protein and significantly increased ERβ expression in carcinomatous and sarcomatous components. CONCLUSIONS: SERM therapy seemingly increases risk of S-uMMMT development; however, clinicopathologic features were similar in all uMMMTs from different backgrounds. p53 mutation and increased ERβ expression might be involved in the etiology of S-uMMMT.
Breast Neoplasms ; Breast ; Desmin ; Estrogens ; Gynecology ; Humans ; Incidence ; Myogenin ; Obstetrics ; Prognosis ; Receptors, Progesterone ; Selective Estrogen Receptor Modulators ; Survival Rate ; Tamoxifen

A 51-year-old woman visited the emergency room with severe abdominal pain of acute onset. She had undergone a breast cancer operation one year previously and had been taking a half-dose (10 mg per day) of tamoxifen for 6 months. She was diagnosed with severe acute necrotizing pancreatitis. She had no other specific underlying disease or medical history. She did not drink alcohol and showed no gallstones on endoscopic ultrasound examination. Her blood triglyceride level had been normal before tamoxifen but had gradually increased to 2,534 mg/dL 6 months after beginning tamoxifen. Tamoxifen was regarded as a very likely causative factor for her necrotizing pancreatitis. After discontinuing the drug and receiving supportive care, she eventually recovered, and her blood triglyceride levels dropped to a normal range. Tamoxifen may be a useful drug for treating breast cancer, but doctors should pay attention to the patient's blood triglyceride level during the medication regimen.
Abdominal Pain ; Breast Neoplasms ; Emergency Service, Hospital ; Female ; Gallstones ; Humans ; Hypertriglyceridemia ; Middle Aged ; Pancreatitis ; Pancreatitis, Acute Necrotizing ; Reference Values ; Tamoxifen ; Triglycerides ; Ultrasonography

tamoxifen use was significantly associated with a decreased risk of CIM (p < 0.001). Age of 40 years or higher and the regimens of doxorubicin plus cyclophosphamide followed by docetaxel or paclitaxel were associated with increased risk of TRA (p = 0.001 and p = 0.002, respectively).CONCLUSION: Marked discrepancy in the rates of CIM and TRA was observed in this study. Further, the age-specific frequency of CIM and TRA observed in this study is a reliable and practical estimate of the risks of CIM and TRA in the absence of gonadal protection.]]>
Amenorrhea ; Breast Neoplasms ; Breast ; Cohort Studies ; Cyclophosphamide ; Doxorubicin ; Drug Therapy ; Female ; Gonads ; Humans ; Korea ; Menopause ; Multivariate Analysis ; Paclitaxel ; Retrospective Studies ; Tamoxifen

OBJECTIVE: To observe the effects of abdominal acupuncture and the periodic therapy of Chinese herbal medicine on follicular development and endometrial receptivity in the patients with infertility induced by ovulation failure and differentiated as kidney deficiency in TCM. METHODS: A total of 84 patients with infertility induced by ovulation failure and differentiated as kidney deficiency were randomized into a combined therapy group (27 cases), an abdominal acupuncture group (27 cases) and a western medication group (30 cases). In the combined therapy group, abdominal acupuncture and the periodic treatment of Chinese herbal medicine was provided. In the abdominal acupuncture group, the simple abdominal acupuncture therapy was used. In the western medication group, clomiphene citrate (CC) and human chorionic gonadotrophin (HCG) prescribed. The treatment for one menstrual cycle was taken as one session and 3 sessions of treatment were required except the pregnancy. The folicle development, endometrial thickness and morphology, menstrual condition and TCM symptom score were observed before and after treatment in the three groups, and the clinical efficacy was evaluated. RESULTS: After treatment, the ovulation was recovered to different degrees in the three groups. The ovulation rate was 59.3% (16/27) in the combined therapy group, 55.6% (15/27) in the abdominal acupuncture group and 53.3% (16/30) in the western medication group. The difference was not significant in comparison among the three groups (>0.05). After treatment, the endometrial thickness in the periovulatory period was increased as compared with the thickness before treatment in the combined therapy group and the abdominal acupuncture group (both <0.05). After treatment, the endometrial thickness in the combined therapy group was higher than the western medication group (<0.05). In comparison before and after treatment, the difference in the endometrial morphology was significant in the combined therapy group and the abdominal acupuncture group (both <0.05). In comparison between the combined therapy group and the western medication group, the difference in the endometrial morphology was significant after treatment (<0.05). After treatment, the menstrual condition and TCM symptom score in the combined therapy group and the abdominal acupuncture group were all improved as compared with those before treatment (all <0.05). The score of menstrual condition in the combined therapy group was higher than the western medication group (<0.05) and TCM symptom score in the combined therapy group and abdominal acupuncture group was higher than the western medication group after treatment (all <0.05). The total effective rate was 88.9% (24/27) in the combined therapy group and was 92.6% (25/29) in the abdominal acupuncture group, which was higher than 56.7% (17/30) in the western medication group (<0.01). There was no adverse reaction in the combined therapy group and the abdominal acupuncture group. CONCLUSION Abdominal acupuncture combined with the periodic therapy of Chinese herbal medicine improve the menstrual condition and relieve the clinical symptoms of infertility induced by ovulation failure of kidney deficiency in the patients and the therapeutic effects are better than the medication with CC + HCG. This combined therapy improves the ovulation rate and the endometrial receptivity at periovulatory stage to increase the pregnancy rate. There is no adverse reaction discovered in clinical practice.
Acupuncture Therapy ; Clomiphene ; Drugs, Chinese Herbal ; Female ; Humans ; Infertility, Female ; Ovulation ; Pregnancy