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1.
Small ; : e2310851, 2024 Feb 09.
Article in English | MEDLINE | ID: mdl-38334256

ABSTRACT

Inspired by the timely emergence of silkworm pupae from their cocoons, silkworm chrysalis-like probiotic composites (SCPCs) are developed for the comprehensive therapy of inflammatory bowel disease (IBD), in which probiotics are enveloped as the "pupa" in a sequential layering of silk sericin (SS), tannic acid (TA), and polydopamine, akin to the protective "cocoon". Compared to unwrapped probiotics, these composites not only demonstrate exceptional resistance to the harsh gastrointestinal environment and exhibit over 200 times greater intestinal colonization but also safeguard probiotics from the damage of IBD environment while enabling probiotics sustained release. The probiotics, in synergy with SS and TA, provide a multi-crossed comprehensive therapy for IBD that simultaneously addresses various pathological features of IBD, including intestinal barrier disruption, elevated pro-inflammatory cytokines, heightened oxidative stress, and disturbances in the intestinal microbiota. SCPCs exhibit remarkable outcomes, including a 9.7-fold reduction in intestinal permeability, an 8.9-fold decrease in IL-6 levels, and a 2.9-fold reduction in TNF-α levels compared to uncoated probiotics. Furthermore, SCPCs demonstrate an impressive 92.25% reactive oxygen species clearance rate, significantly enhance the richness of beneficial intestinal probiotics, and effectively diminish the abundance of pathogenic bacteria, indicating a substantial improvement in the overall therapeutic effect of IBD.

2.
Brief Bioinform ; 23(3)2022 05 13.
Article in English | MEDLINE | ID: mdl-35229103

ABSTRACT

Coronavirus disease 2019 (COVID-19) is a global pandemic and there is an urgent need to discover the therapy for COVID-19. In our original article, we first obtained the target proteins of acupuncture and related target genes of COVID-19 by searching English and Chinese databases, then Gene Ontology biological processes and enrichment analysis were performed on the overlapping targets of acupuncture with COVID-19. Moreover, the compound-target and compound-disease-target network was constructed. This is an innovative attempt to predict the potential benefits of acupuncture treatment for COVID-19. In this letter, we answered reader Zheng's comments.


Subject(s)
Acupuncture Therapy , Acupuncture , COVID-19 , COVID-19/therapy , Computational Biology , Gene Ontology , Humans
3.
Zhongguo Zhong Yao Za Zhi ; 49(7): 1974-1980, 2024 Apr.
Article in Zh | MEDLINE | ID: mdl-38812210

ABSTRACT

Hypertension is the most common chronic disease in clinics and has become the most common risk factor for cardiovascular diseases. Because of its high incidence rate, disability rate, and mortality, it has attracted worldwide attention. Despite continuous progress in modern medicine in the treatment of hypertension with new antihypertensive drugs such as Zilebesiran, a nucleic acid drug that acts on microRNA, direct renin inhibitors, and renal sympathetic blockade, the control rate is still not ideal. How to effectively prevent and control hypertension has become one of the urgent clinical challenges to be solved. Traditional Chinese medicine(TCM) has a long record of treating hypertension and has accumulated rich experience, including theoretical understanding, effective single medicine, compound medicine, traditional Chinese patent medicines, and classic famous prescriptions. In TCM, hypertension belongs to the categories of diseases such as dizziness and headache. Previous literature and clinical studies have found that hypertension has key pathogenesis such as fire syndrome, fluid syndrome, deficiency syndrome, and blood stasis syndrome. Among them, the hyperactivity of liver Yang is closely related to blood pressure fluctuations, blood pressure variability, inflammation, and sympathetic activity stimulation. Internal obstruction by blood stasis is closely related to the damage of target organs such as the heart, brain, and kidneys in hypertension. Therefore, the two key pathogenesis of liver yang hyperactivity and internal obstruction by blood stasis run through the entire process of hypertension. Previous studies have found that the effective empirical formula Tianxiong Granules, based on the principles of suppressing Yang and promoting blood circulation, originated from the classic formula Xiongqiong Tianma Pills in Yu Yao Yuan Fang. It is composed of Gastrodiae Rhizoma, Chuanxiong Rhizoma, Puerariae Lobatae Radix, Achyranthis Bidentatae Radix, and Cyathulae Radix and has significant therapeutic effects in the treatment of hypertension. The clinical indications include headache, dizziness, bloating, strong neck, and weak waist and legs. At the same time, it may be accompanied by poor speech, thirst, normal or loose stools, soreness in the waist and legs, lower limb pain, muscle and pulse spasm, menstrual and abdominal pain, dark red tongue, strong pulse strings, or straight and long pulse strings that pass through the mouth of an inch. In the combination rule, it can be used according to the different pathogenesis stages of hypertension patients. In the fire syndrome stage, it is often combined with Tianma Gouteng Decoction and Chaihu Jia Longgu Muli Decoction. In the fluid syndrome stage, it is often combined with Banxia Baizhu Tianma Decoction. In the deficiency syndrome stage, it is often combined with Liuwei Dihuang Pills and Shenqi Pills. In terms of dosage, it is important to focus on the main symptoms and adjust the dosage of key drugs based on blood pressure values. Some drugs can be used in sufficient quantities. By analyzing the compatibility of Tianxiong Granules, clinical application indications, combined formula experience, and dosage application experience, we provide effective treatment methods and more options for TCM to treat hypertension with Yang hyperactivity and blood stasis syndrome.


Subject(s)
Drugs, Chinese Herbal , Hypertension , Humans , Hypertension/drug therapy , Hypertension/physiopathology , Drugs, Chinese Herbal/administration & dosage , Drugs, Chinese Herbal/therapeutic use , Blood Circulation/drug effects , Blood Pressure/drug effects , Medicine, Chinese Traditional , Antihypertensive Agents/pharmacology
4.
BMC Genomics ; 24(1): 411, 2023 Jul 20.
Article in English | MEDLINE | ID: mdl-37474895

ABSTRACT

OBJECTIVE: The comorbidities of coronary artery disease (CAD) and rheumatoid arthritis (RA) are mutual risk factors, which lead to higher mortality, but the biological mechanisms connecting the two remain unclear. Here, we aimed to identify the risk genes for the comorbid presence of these two complex diseases using a network modularization approach, to offer insights into clinical therapy and drug development for these diseases. METHOD: The expression profile data of patients CAD with and without RA were obtained from the GEO database (GSE110008). Based on the differentially expressed genes (DEGs), weighted gene co-expression network analysis (WGCNA) was used to construct a gene network, detect co-expression modules, and explore their relation to clinical traits. The Zsummary index, gene significance (GS), and module membership (MM) were utilized to screen the important differentiated modules and hub genes. The GO and KEGG pathway enrichment analysis were applied to analyze potential mechanisms. RESULT: Based on the 278 DEGs obtained, 41 modules were identified, of which 17 and 24 modules were positively and negatively correlated with the comorbid occurrence of CAD and RA (CAD&RA), respectively. Thirteen modules with Zsummary < 2 were found to be the underlying modules, which may be related to CAD&RA. With GS ≥ 0.5 and MM ≥ 0.8, 49 hub genes were identified, such as ADO, ABCA11P, POT1, ZNF141, GPATCH8, ATF6 and MIA3, etc. The area under the curve values of the representative seven hub genes under the three models (LR, KNN, SVM) were greater than 0.88. Enrichment analysis revealed that the biological functions of the targeted modules were mainly involved in cAMP-dependent protein kinase activity, demethylase activity, regulation of calcium ion import, positive regulation of tyrosine, phosphorylation of STAT protein, and tissue migration, etc. CONCLUSION: Thirteen characteristic modules and 49 susceptibility hub genes were identified, and their corresponding molecular functions may reflect the underlying mechanism of CAD&RA, hence providing insights into the development of clinical therapies against these diseases.


Subject(s)
Arthritis, Rheumatoid , Coronary Artery Disease , Humans , Coronary Artery Disease/epidemiology , Coronary Artery Disease/genetics , Gene Expression Profiling , Gene Regulatory Networks , Arthritis, Rheumatoid/complications , Arthritis, Rheumatoid/epidemiology , Arthritis, Rheumatoid/genetics , Phenotype , Muscle Proteins/genetics
5.
Brief Bioinform ; 22(5)2021 09 02.
Article in English | MEDLINE | ID: mdl-33866350

ABSTRACT

Acupuncture is an important part of Chinese medicine that has been widely used in the treatment of inflammatory diseases. During the coronavirus disease 2019 (COVID-19) epidemic, acupuncture has been used as a complementary treatment for COVID-19 in China. However, the underlying mechanism of acupuncture treatment of COVID-19 remains unclear. Based on bioinformatics/topology, this paper systematically revealed the multi-target mechanisms of acupuncture therapy for COVID-19 through text mining, bioinformatics, network topology, etc. Two active compounds produced after acupuncture and 180 protein targets were identified. A total of 522 Gene Ontology terms related to acupuncture for COVID-19 were identified, and 61 pathways were screened based on the Kyoto Encyclopedia of Genes and Genomes. Our findings suggested that acupuncture treatment of COVID-19 was associated with suppression of inflammatory stress, improving immunity and regulating nervous system function, including activation of neuroactive ligand-receptor interaction, calcium signaling pathway, cancer pathway, viral carcinogenesis, Staphylococcus aureus infection, etc. The study also found that acupuncture may have additional benefits for COVID-19 patients with cancer, cardiovascular disease and obesity. Our study revealed for the first time the multiple synergistic mechanisms of acupuncture on COVID-19. Acupuncture may play an active role in the treatment of COVID-19 and deserves further promotion and application. These results may help to solve this pressing problem currently facing the world.


Subject(s)
Acupuncture , COVID-19/therapy , Computational Biology/methods , COVID-19/physiopathology , COVID-19/virology , Humans , SARS-CoV-2/isolation & purification , Treatment Outcome
6.
Appl Opt ; 62(16): 4310-4320, 2023 Jun 01.
Article in English | MEDLINE | ID: mdl-37706922

ABSTRACT

We calculated the group velocity of light in internal conical refraction in a biaxial crystal as a function of the direction of the electric displacement vector, or the vibration direction, of its carrier wave. Our method represents group velocity through the electromagnetic fields of light, rather than its wave normal or ray direction. The travel time of a light pulse traversing a parallel plate biaxial crystal in internal conical refraction is found to vary as a sinusoidal function of twice the vibration angle of the light wave. Our method distinguishes the four directions of the two optic axes in monoclinic and triclinic crystals. Numerical examples are given for K N b O 3 at the wavelength of 400 nm, and for S n 2 P 2 S 6 at the wavelength of 550 nm.

7.
Zhongguo Zhong Yao Za Zhi ; 48(17): 4819-4824, 2023 Sep.
Article in Zh | MEDLINE | ID: mdl-37802822

ABSTRACT

Hypertension is the most important risk factor for cardiovascular disease-related deaths among urban and rural residents, and it has become a significant global public health issue. In October 2022, the Clinical Practice Guidelines for the Management of Hypertension in China(hereinafter referred to as the Practice Guidelines) were jointly released by the National Cardiovascular Center and other academic organizations. The Practice Guidelines sparked extensive discussions as they clearly lowered the diagnostic criteria for hypertension, raised the blood pressure targets for elderly patients, and proposed changes in the timing of early medication intervention. While these adjustments have some international evidence-based support, there is still debate regarding the cardiovascular benefits of intensified blood pressure control based on the existing level of evidence. Furthermore, whether the series of new standards proposed in the Practice Guidelines are suitable for the Chinese population and whether the hypertension control level in primary care in China can adapt to the new diagnostic and treatment standards require further in-depth research. In contrast to the strict blood pressure control concept emphasized in the Practice Guidelines, traditional Chinese medicine(TCM) emphasizes the concept of comprehensive prevention and treatment and holistic therapy in the treatment of hypertension, including prehypertension, hypertension, and target organ damage. In recent years, based on abundant clinical trial research and high-quality evidence-based support, the advantages of TCM in treating hypertension have gradually emerged. Previous studies by this research team have found that the pathogenesis of hypertension includes three major types: fire syndrome, fluid retention syndrome, and deficiency syndrome. TCM treatment of hypertension features stable blood pressure reduction, gentle blood pressure lowering, and long-lasting effects. In addition to blood pressure reduction, it also has effects such as reversing risk factors and protecting target organ damage. It demonstrates the characteristics of multiple targets, multiple components, and comprehensive regulation, and can be applied throughout the entire process of prevention and treatment, including prehypertension, hypertension, and target organ damage in the early, middle, and late stages of hypertension. Therefore, it has certain clinical application prospects.


Subject(s)
Hypertension , Prehypertension , Aged , Humans , Antihypertensive Agents/therapeutic use , China , Hypertension/diagnosis , Hypertension/drug therapy , Medicine, Chinese Traditional , Prehypertension/drug therapy , Practice Guidelines as Topic
8.
Zhongguo Zhong Yao Za Zhi ; 48(24): 6592-6599, 2023 Dec.
Article in Zh | MEDLINE | ID: mdl-38212019

ABSTRACT

Hypertension, a primary cause of cardiovascular and cerebrovascular events, has become a major global public health problem and caused a heavy burden of health economics on the society. In "the 20 Most Important and Most Preventable Health Problems" released by the Chinese Academy of Engineering, hypertension was ranked the second. Due to the disease complexity, many hypertension patients need to take antihypertensive drugs for life. Although significant progress has been achieved in blood pressure lowering by western medicines, the problems including adverse reactions, poor compliance due to long-term medication, and ineffective mitigation in clinical symptoms related to hypertension remain to be addressed. In the last decade, the research on traditional Chinese medicine(TCM) treatment of hypertension has received much attention and achieved remarkable progress. The TCM treatment of hypertension is the most active area of research with integrated Chinese and western medicine in China. In addition to lowering blood pressure smoothly, TCM can alleviate clinical symptoms, reverse risk factors, improve the quality of life, and protect target organs from the damage caused by hypertension. This article systematically reviews the research progress of TCM in treating hypertension in the last decade from the following four aspects: consensus on guideline, clinical trial, experimental study, and systematic review/Meta-analysis. It summarized the evidence of TCM in reducing blood pressure and clarified the mechanism of TCM in reducing blood pressure, aiming to provide a reference for the TCM diagnosis and treatment of hypertension and the development of new drugs.


Subject(s)
Drugs, Chinese Herbal , Hypertension , Humans , Antihypertensive Agents/therapeutic use , Drugs, Chinese Herbal/therapeutic use , Hypertension/drug therapy , Medicine, Chinese Traditional
9.
Zhongguo Zhong Yao Za Zhi ; 48(10): 2613-2619, 2023 May.
Article in Zh | MEDLINE | ID: mdl-37282921

ABSTRACT

Arrhythmia, a common and frequently occurring cardiovascular disease, causes a heavy burden on the public health of China. Approximately 20 million patients are suffering from this disease in China and treated by pharmacological and surgical therapies. However, antiarrhythmic drugs can cause arrhythmia and surgical treatment has the risks of failure and recurrence. Therefore, the clinical outcome of arrhythmia remains to be improved. According to the traditional Chinese medicine(TCM) theory, arrhythmia is a disease of palpitation induced by 7 conditions: liver depression and Qi stagnation, accumulation of turbid phlegm, fluid retention attacking the heart, fire-heat disturbing the heart, stasis obstruction of heart vessel, cold congealing in heart vessel, and the deficiency of Qi, blood, Yin, and Yang. Therefore, this study concisely proposed 7 TCM syndromes of arrhythmia, including the palpitation due to depression, phlegm, fluid retention, fire, blood stasis, cold, and deficiency. The corresponding treatment strategies were recommended as follows: Chaihu Longgu Muli Decoction for the palpitation due to depression, Wendan Decoction for the palpitation due to phlegm, Linggui Zhugan Decoction for the palpitation due to fluid retention, Sanhuang Xiexin Decoction for the palpitation due to fire, Xuefu Zhuyu Decoction for the palpitation due to blood stasis, and Mahuang Fuzi Xixin Decoction for the palpitation due to cold, and Guizhi Gancao Decoction, Guizhi Gancao Longgu Muli Decoction, Huanglian Ejiao Decoction, Zhigancao Decoction, and Guipi Decoction for the palpitation due to the deficiency of Qi, blood, Yin, and Yang. Multiple formulas should be combined if the patient presents several TCM syndromes simultaneously. According to the principles of the correspondence between formula and syndrome and the treatment with consideration to both pathogenesis and pathology and both herbal nature and pharmacology, this study proposed an integrated treatment model of "pathogenesis-pathology-nature-pharmacology" to enhance the clinical efficacy of classic herbal formulas in the treatment of arrhythmia.


Subject(s)
Drugs, Chinese Herbal , Heart Failure , Humans , Medicine, Chinese Traditional , Syndrome , Drugs, Chinese Herbal/therapeutic use , Heart Failure/drug therapy , Arrhythmias, Cardiac/drug therapy , China
10.
Zhongguo Zhong Yao Za Zhi ; 48(10): 2620-2624, 2023 May.
Article in Zh | MEDLINE | ID: mdl-37282922

ABSTRACT

Chaihu Jia Longgu Muli Decoction was firstly recorded in Treatise on Cold Damage(ZHANG Zhong-jing, Eastern Han dynasty). According to this medical classic, it is originally used in the treatment of the Shaoyang and Yangming syndrome. Based on the modern pathophysiological mechanism, this study interpreted the classic provisions of Chaihu Jia Longgu Muli Decoction. Original records of "chest fullness" "annoyance" "shock" "difficult urination" "delirium" "heavy body and failing to turn over" all have profound pathophysiological basis, involving disorders in cardiovascular, respiratory, nervous, and mental systems. This formula is widely used, which can be applied to treat epilepsy, cerebral arteriosclerosis, cerebral infarction, and other cerebrovascular diseases, hypertension, arrhythmia, and other cardiovascular diseases, insomnia, constipation, anxiety, depression, cardiac neurosis and other acute and chronic diseases as well as diseases in psychosomatic medicine. The clinical indications include Bupleuri Radix-targeted syndrome such as fullness and discomfort in chest and hypochondrium, bitter taste mouth, dry throat, and dizziness, the insomnia, anxiety, depression, susceptibility to fright, upset, dreamfulness and other psychiatric symptoms, red tongue, thick and yellow tongue coating, and wiry hard and powerful pulse. This formula was found to be used in combination with other formulas, such as Gualou Xiebai Decoction, Wendan Decoction, Zhizhu Pills, Juzhijiang Decoction, Suanzaoren Decoction, and Banxia Baizhu Tianma Decoction.


Subject(s)
Drugs, Chinese Herbal , Hypertension , Sleep Initiation and Maintenance Disorders , Humans , Sleep Initiation and Maintenance Disorders/drug therapy , Drugs, Chinese Herbal/therapeutic use , Hypertension/drug therapy , Syndrome , Arrhythmias, Cardiac/drug therapy , Medicine, Chinese Traditional
11.
Zhongguo Zhong Yao Za Zhi ; 48(10): 2625-2629, 2023 May.
Article in Zh | MEDLINE | ID: mdl-37282923

ABSTRACT

The relationship between disease and syndrome is a research focus in integrated traditional Chinese and western medicine. Depending on the focus, the disease-syndrome combination for treatment is manifested as the different treatment methods for the same disease and the same treatment method for different diseases based on the syndrome, and different treatment methods for the same syndrome and the same treatment method for different syndromes based on the disease. The mainstream model is the combination of di-sease identification in modern medicine with syndrome identification and core pathogenesis in traditional Chinese medicine. However, current research on the combination of disease and syndrome and core pathogenesis tends to focus on the heterogeneity between disease and syndrome and the separation of syndrome and treatment. Therefore, the study proposed the research idea and model of core formulas-syndromes(CFS). According to the theory of formula-syndrome correspondence, the research idea of CFS deepens the research on core pathogenesis, which aims to summarize the core formulas and syndromes for diseases. The research fields include diagnostic criteria for the indications of formulas, distribution patterns of formulas and syndromes for diseases, the evolution of medicinal-syndrome based on formulas-syndromes, formula combination law based on formulas-syndromes, and the dynamic evolution of formulas-syndromes. Through the summary of ancient classics, clinical experience, and medical records, and with the methods of expert consultation, factor analysis, and clustering analysis, research on the diagnostic criteria for the indications of formulas aims to explore the diagnosis information such as the diseases, symptoms, signs, and pathophysiology. The research on the distribution patterns of formulas and syndromes for diseases tends to summarize the specific types of formulas and syndromes for the diseases through literature research and clinical cross-sectional studies based on the establishment of diagnostic criteria for the indications of formulas. The research on the evolution of medicinal-syndrome aims to clarify the medicinal-syndrome law through literature and clinical research. The formula combination law refers to the fact that the core prescriptions for a disease often appear in combination with other prescriptions on a regular basis. The dynamic evolution of formulas-syndromes refers to the continuous transformation and change of formulas and syndromes in the process of disease development with changes in time and space. The CFS is conducive to the unification of disease, syndrome and treatment and to the deepening of the research model of disease and syndrome integration.


Subject(s)
Drugs, Chinese Herbal , Humans , Drugs, Chinese Herbal/therapeutic use , Syndrome , Cross-Sectional Studies , Medicine, Chinese Traditional , Prescriptions
12.
Zhongguo Zhong Yao Za Zhi ; 48(7): 1982-1988, 2023 Apr.
Article in Zh | MEDLINE | ID: mdl-37282975

ABSTRACT

Hypertension and its target organ damage have become a major public health problem. Sexual dysfunction is a new problem in the treatment of modern hypertension. Modern pathophysiological studies have shown that hypertension can lead to sexual dysfunction. In addition, three major hypotensive drugs represented by diuretics can also lead to sexual dysfunction. In traditional Chinese medicine(TCM), hypertension belongs to "vertigo" "headache" "head wind", etc. In the past, the understanding of the TCM pathogenesis of hypertension was mainly from the perspectives of "liver wind" and "Yang hyperactivity". However, based on the in-depth research on ancient and modern literature and medical records and many years of clinical practice, it has been identified that kidney deficiency was the key pathogenesis. Hypertension complicated with sexual dysfunction belongs to the category of kidney deficiency syndrome in TCM, especially the deficiency of kidney Yin. Previous studies by other research groups showed that Yin-enriching and kidney-tonifying method could effectively reduce blood pressure, improve sexual dysfunction, reverse risk factors, and protect target organs. This article systematically discussed the TCM understanding, modern pathophysiological mechanism, and the clinical treatment strategy of kidney-tonifying drugs(single drugs and compounds) in the treatment of hypertension complicated with sexual dysfunction in order to provide a scientific basis for kidney-tonifying method in the treatment of hypertension complicated with sexual dysfunction.


Subject(s)
Drugs, Chinese Herbal , Hypertension , Humans , Antihypertensive Agents/therapeutic use , Medicine, Chinese Traditional , Hypertension/complications , Hypertension/drug therapy , Blood Pressure , Risk Factors , Drugs, Chinese Herbal/therapeutic use
13.
Opt Lett ; 47(9): 2338-2341, 2022 May 01.
Article in English | MEDLINE | ID: mdl-35486794

ABSTRACT

We theoretically prove that the group velocity of a light pulse traveling in an optic ray axis direction of a biaxial crystal depends on the polarization state of the light. Our calculation shows that the group index varies as a sinusoidal function of twice the polarization angle of the light pulse. For monoclinic and triclinic crystals, in general the four directions of the two optic ray axes need to be distinguished. Numerical examples show that in KNbO3 the group velocity varies by 2.7% at 400 nm wavelength, and in Sn2P2S6 it varies by 3.9% at 550 nm wavelength, when the polarization state of the light is changing.

14.
Zhongguo Zhong Yao Za Zhi ; 47(24): 6541-6550, 2022 Dec.
Article in Zh | MEDLINE | ID: mdl-36604902

ABSTRACT

Cannabidiol is the main non-psychoactive component of Cannabis sativa, which has multiple medicinal activities, such as antiepileptic, immunomodulation, analgesic, antioxidant, anticonvulsant, anti-anxiety and other functions. In recent years, it has been found that cannabidiol can inhibit the proliferation of various tumor cells, induce apoptosis and autophagy of tumor cells, arrest cell cycle, interrupt invasion and metastasis of tumor cells, regulate tumor microenvironment, exert synergistic therapy with other chemotherapeutic drugs, and reduce the toxicity of chemotherapeutic drugs. However, its anti-tumor effect remains controversial and its application is limited. The study of microspheres, nano liposomes and other new drug delivery systems can improve the anti-tumor effect of cannabidiol. In this study, the anti-tumor mechanism and application of cannabidiol were summarized and discussed in order to provide inspirations for its further investigation and application.


Subject(s)
Cannabidiol , Cannabis , Neoplasms , Humans , Cannabidiol/pharmacology , Cannabidiol/therapeutic use , Neoplasms/drug therapy , Apoptosis , Anxiety Disorders/drug therapy , Tumor Microenvironment
15.
Opt Lett ; 46(6): 1425-1428, 2021 Mar 15.
Article in English | MEDLINE | ID: mdl-33720203

ABSTRACT

We have proved that compared to phase velocity and ray velocity surfaces, the group velocity surface of a monoclinic crystal has a reduced symmetry, due to the loss of the two mirror planes that contain the crystallographic b axis. We have derived a formula for calculation of the group velocity of the extraordinary light traveling in a principal plane of a biaxial crystal, which takes into account the rotation of the dielectric frame due to frequency dispersion. The maximum asymmetry of the group velocity of light traveling in the a-c plane is found to be 2.4% at 365 nm in BiB3O6 and 1.4% at 550 nm in Sn2P2S6.

16.
Appl Opt ; 60(7): 1987-1994, 2021 Mar 01.
Article in English | MEDLINE | ID: mdl-33690291

ABSTRACT

Using the wave vector surface, we have derived the analytical expressions for the group velocities of the extraordinary light and the ordinary light traveling in an optically uniaxial crystal. Our formulas are in terms of either the wavevector direction or the ray direction, and they use only the principal refractive indices and their frequency dispersions. The algebraic equation for the group velocity surface of the crystal is also derived. While the group velocity is in the same direction as the ray velocity, numerical calculation shows that in the visible region the group velocity is slower than the ray velocity, and the difference between them becomes significant at short wavelengths.

17.
Appl Opt ; 60(14): 4143-4153, 2021 May 10.
Article in English | MEDLINE | ID: mdl-33983167

ABSTRACT

Based on the wave vector surface, we have derived the analytical expressions for the group velocity of light traveling in an optically biaxial crystal in an arbitrary direction. Our formulas are in terms of either the wave vector direction or the ray direction. An axis dispersion vector is introduced to specify the rotation of the dielectric frame in monoclinic and triclinic crystals, which is found to be responsible for the asymmetry of the group velocity surfaces of these two crystal systems when compared to their phase and ray velocity surfaces. Our formulas confirm that the group velocity of light in a nondissipative medium equals the ratio between the Poynting vector and the total energy density of the electromagnetic field. The group index of light is found to be decomposable into three parts: the ray index, the group index due to principal refractive index dispersion, and that due to axis dispersion. Numerical calculations are performed for the group velocity of light in ${\rm Sn}_2{\rm P}_2{\rm S}_6$ crystal at 550 nm wavelength. Our results show that the dispersion of the principal refractive indices has a considerable contribution to the group index.

18.
Pharmacol Res ; 160: 105056, 2020 10.
Article in English | MEDLINE | ID: mdl-32622723

ABSTRACT

Currently, coronavirus disease 2019 (COVID-19), which can lead to severe respiratory failure and death, is now a global pandemic with no specific anti-viral drugs or vaccines. However, It is worth noting that traditional Chinese medicine (TCM), especially Chinese herbal medicine (CHM), has been widely applied in mainland China since outbreak, bringing new hope for the prevention and control of COVID-19. A comprehensive literature searching was conducted in 7 electronic databases from their inception up to June 21, 2020 to evaluate the efficacy and safety of CHM for COVID-19. Eighteen randomized controlled trials (RCTs) involving 2275 patients were enrolled. Most of CHMs were originated from classical Chinese herbal formulas. Liquoric Root (Gancao, Radix Glycyrrhizae), Baical Skullcap Root (Huangqin, Radix Scutellariae Baicalensis), Pinellia Rhizome (Banxia, Rhizoma Pinelliae Tematae), Forsythia Fruit (Lianqiao, Fructus Forsythiae Suspensae), and Bitter Apricot Seed (Kuxingren, Semen Armeniacae Amarum) were most frequently used Chinese herbs. The most commonly used dosage formulation was decoction. Our meta-analyses found that comparing CHM group and conventional western medicine group, CHM group has improvements in several clinical parameters including lung CT, clinical cure rate, ranging from mild to critical cases, length of hospital stay, total score of clinical symptoms, fever reduction time, symptom score of fever, number of cough reduction cases, symptom score of cough, number of fatigue reduction cases, symptom score of fatigue, disappearing time of fatigue, TCM syndrome, viral nucleic acid testing, and inflammatory biomarkers (C-reactive protein). Besides, no severe adverse effects was identified by CHM. CHM, especially classical Chinese herbal formulas, could be used as potential candidates for COVID-19 in this battle.


Subject(s)
Coronavirus Infections/drug therapy , Drugs, Chinese Herbal/therapeutic use , Pneumonia, Viral/drug therapy , COVID-19 , Coronavirus Infections/complications , Drugs, Chinese Herbal/adverse effects , Humans , Medicine, Chinese Traditional , Pandemics , Pneumonia, Viral/complications , Randomized Controlled Trials as Topic , COVID-19 Drug Treatment
19.
Acta Pharmacol Sin ; 41(6): 735-744, 2020 Jun.
Article in English | MEDLINE | ID: mdl-32051552

ABSTRACT

Traditional Chinese medicine (TCM) has evolved over several thousands of years, which has been shown to be efficacious in the treatment of ischemic heart disease. Three classical TCM prescriptions, namely Xuefu Zhuyu Decoction, Zhishi Xiebai Guizhi Decoction, and Gualou Xiebai Banxia Decoction, have been extensively used in the treatment of coronary heart disease (CHD). Based on molecular network modeling, we performed a comparative pharmacogenomic analysis to systematically determine the drug-targeting spectrum of the three prescriptions at molecular level. Wide-area target molecules of CHD were covered, which was a common feature of the three decoctions, demonstrating their therapeutic functions. Meanwhile, collective signaling involved metabolic/pro-metabolic pathways, driving and transferring pathways, neuropsychiatric pathways, and exocrine or endocrine pathways. These organized pharmacological disturbance was mainly focused on almost all stages of CHD intervention, such as anti-atherosclerosis, lipid metabolism, inflammation, vascular wall function, foam cells formation, platelets aggregation, thrombosis, arrhythmia, and ischemia-reperfusion injury. In addition, heterogeneity analysis of the global pharmacological molecular spectrum revealed that signaling crosstalk, cascade convergence, and key targets were tendentious among the three decoctions. After all, it is unadvisable to rank the findings on targeting advantages of the three decoctions. Comparative pharmacological evidence may provide an appropriate decoction scheme for individualized intervention of CHD.


Subject(s)
Coronary Disease/drug therapy , Coronary Disease/genetics , Drugs, Chinese Herbal/therapeutic use , Pharmacogenomic Testing , Humans , Medicine, Chinese Traditional , Models, Molecular
20.
Appl Opt ; 58(4): 883-891, 2019 Feb 01.
Article in English | MEDLINE | ID: mdl-30874133

ABSTRACT

We theoretically investigate non-refracted extraordinary rays where the ray does not change its direction when transmitted from a vacuum into a uniaxial crystal, even at oblique incidence. This is possible only when the optic axis is in the plane of incidence. We find that within the usual birefringence range of no≤ne≤no2, for a given angle of cut, there exits only one angle of incidence that produces a non-refracted extraordinary ray. Beyond this range, the number of solutions may be up to three. Numerical examples are given. All cases can be solved algebraically from a quartic equation.

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