1
|
Chen T, Ai G, Liang G, Zeng L, Zhao D, Liu J, Dou Y. Mitigation of inflammatory bowel disease-related osteoporosis by oxyberberine: Insights into the RANKL/NF-κB signaling pathway. Biomed Pharmacother 2024; 174:116523. [PMID: 38574627 DOI: 10.1016/j.biopha.2024.116523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/06/2024] Open
Abstract
Inflammatory bowel disease is linked to a higher occurrence of bone loss. Oxyberberine can effectively improve experimental inflammatory bowel disease. However, no study has shown the effect of oxyberberine on inflammatory bowel disease induced bone loss. The present study was performed to investigate the role of oxyberberine in inflammatory bowel disease induced osteoporosis in chronic inflammatory bowel disease mice model. The inflammatory bowel disease mice were orally given two doses of oxyberberine daily. Blood, colon, and bone specimens were collected for biomarker assessments and histological examinations. Bone biomechanical properties and key proteins and genes involved in the receptor activator of nuclear factor kappa-B ligand/nuclear factor kappa-B signaling pathway were evaluated. Additionally, the binding characteristics of oxyberberine and receptor activator of nuclear factor kappa-B ligand were evaluated by in silico simulation. Results indicated that oxyberberine treatment significantly attenuated the macroscopic damage, colonic shortening, and histological injury from the colon. Furthermore, oxyberberine decreased serum inflammatory cytokine levels. The intervention with oxyberberine significantly mitigated the deterioration of bone mass, biomechanical properties, and microstructural parameters. Moreover, the upregulated osteoclast formation factors in model mice were significantly abolished by oxyberberine. In silico simulation results also showed that oxyberberine was firmly bound with target protein. Hence, our findings indicated that oxyberberine had the potential to mitigate inflammatory bowel disease induced inflammation in bone, inhibit osteoclast formation through regulating the receptor activator of nuclear factor kappa-B ligand/nuclear factor kappa-B signaling pathway, and might be a valuable approach in preventing bone loss associated with inflammatory bowel disease.
Collapse
Affiliation(s)
- Tingting Chen
- School of Medicine, Southern University of Science and Technology, Shenzhen, China; Southern University of Science and Technology Hospital, Shenzhen, China
| | - Gaoxiang Ai
- Institute of Animal Husbandry and Veterinary Science, Jiangxi Academy of Agricultural Sciences, Nanchang, China
| | - Guihong Liang
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China; Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China
| | - Lingfeng Zeng
- State Key Laboratory of Traditional Chinese Medicine Syndrome/The Second Clinical Medical College of Guangzhou University of Chinese Medicine/Post-Doctoral Research Station, Guangzhou, China; The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China; Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China
| | - Di Zhao
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China; Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China
| | - Jun Liu
- Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China; Guangdong Second Traditional Chinese Medicine Hospital (Guangdong Province Engineering Technology Research Institute of Traditional Chinese Medicine), Guangzhou, China.
| | - Yaoxing Dou
- State Key Laboratory of Traditional Chinese Medicine Syndrome/The Second Clinical Medical College of Guangzhou University of Chinese Medicine/Post-Doctoral Research Station, Guangzhou, China; The Second Affiliated Hospital of Guangzhou University of Chinese Medicine (Guangdong Provincial Hospital of Chinese Medicine), Guangzhou, China; Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China.
| |
Collapse
|
2
|
Chen X, Xiong P, Song W, Song Q, Zou Z, Huang J, Chen J, Xu C, Su W, Ai G, Wei Q. Dietary supplementation with honeycomb extracts positively improved egg nutritional and flavor quality, serum antioxidant and immune functions of laying ducks. Front Vet Sci 2023; 10:1277293. [PMID: 37901107 PMCID: PMC10600442 DOI: 10.3389/fvets.2023.1277293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 09/25/2023] [Indexed: 10/31/2023] Open
Abstract
Introduction Honeycomb is a traditional natural health medicine and has antioxidant, antibacterial, anti-inflammatory, antiviral and antitumor activities. It is currently unclear whether honeycomb extract supplementation has positive effects on the intensive farming laying duck production. This study aims to evaluate the effects of honeycomb extracts on the laying performance, egg nutritional and flavor quality, serum biochemical indexes, and antioxidant and immune status in laying ducks. Methods A total of 672 healthy 28-week-old Shanma laying ducks with similar laying performance and body weight were randomly distributed into four dietary treatments with 6 replicates of 28 birds. The birds in each treatment were fed the basal diet supplemented with 0 (control group), 0.5, 1.0 or 1.5 g/kg honeycomb extracts, respectively. Feed and water were provided ad libitum for 45 days. Laying performance, egg quality, egg nutrition and flavor quality, serum parameters were assessed. Results The results showed that compared with the control group, honeycomb extracts addition significantly increased the average daily feed intake but did not affect the other laying performance indexes, egg quality or serum biochemical indexes of laying ducks. Dietary supplementation with honeycomb extracts significantly increased crude protein content and decreased the contents of cholesterol and trimethylamine in eggs. Diets supplemented with 1.5 g/kg honeycomb extracts significantly improved egg total amino acids and flavor amino acids contents, monounsaturated fatty acids and polyunsaturated fatty acids composition and enhanced the serum antioxidant activity and immune functions of ducks. Discussion Duck eggs are rich in nutrients and a valuable source of high-quality food for human, while they are rarely consumed directly by consumers because of their stronger fishy odor and lower sensory quality. Many studies have showed that the influence of dietary supplementation on egg components. This study indicated that dietary supplementation with honeycomb extracts positively reduced the contents of egg cholesterol and trimethylamine, improve egg amino acids contents and fatty acid profiles, enhanced serum antioxidant and immune status of laying ducks. The recommended supplemental level of honeycomb extracts was 1.5 g/kg in the diet of laying ducks.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Qipeng Wei
- Institute of Animal Husbandry and Veterinary Science, Jiangxi Academy of Agricultural Sciences, Nanchang, China
| |
Collapse
|
3
|
Qin Z, Li M, Cheng J, Huang Z, Ai G, Qu C, Xie Y, Li Y, Liao H, Xie J, Su Z. Self-Assembled nanoparticles Combining Berberine and Sodium Taurocholate for Enhanced Anti-Hyperuricemia Effect. Int J Nanomedicine 2023; 18:4101-4120. [PMID: 37525694 PMCID: PMC10387259 DOI: 10.2147/ijn.s409513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/19/2023] [Indexed: 08/02/2023] Open
Abstract
Propose Berberine (BBR) is extensively studied as an outstanding anti-hyperuricemia drug. However, the clinical application of BBR was limited due to its poor absorption and low bioavailability. Therefore, there is an urgent necessity to find a novel drug formulation to address the issues of BBR in clinical application. Methods Herein, we conducted the solubility, characterization experiments to verify whether BBR and sodium taurocholate (STC) self-assembled nanoparticles (STC@BBR-SANPs) could form. Furthermore, we proceeded the release experiment in vitro and in vivo to investigate the drug release effect. Finally, we explored the therapeutic effect of STC@BBR-SANPs on hyperuricemia (HUA) through morphological observation of organs and measurement of related indicators. Results The solubility, particle size, scanning electron microscopy (SEM), and stability studies showed that the stable STC@BBR-SANPs could be formed in the BBR-STC system at ratio of 1:4. Meanwhile, the tissue distribution experiments revealed that the STC@BBR-SANPs could accelerate the absorption and distribution of BBR. In addition, the pharmacology study demonstrated that both BBR and STC@BBR-SANPs exhibited favorable anti-HUA effects and nephroprotective effects, while STC@BBR-SANPs showed better therapeutic action than that of BBR. Conclusion This work indicated that STC@BBR-SANPs can be self-assembly formed, and exerts excellent uric acid-lowering effect. STC@BBR-SANPs can help to solve the problems of poor solubility and low absorption rate of BBR in clinical use, and provide a new perspective for the future development of BBR.
Collapse
Affiliation(s)
- Zehui Qin
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
| | - Minhua Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan, 523808, People’s Republic of China
| | - Juanjuan Cheng
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan, 523808, People’s Republic of China
| | - Ziwei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan, 523808, People’s Republic of China
| | - Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan, 523808, People’s Republic of China
| | - Chang Qu
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510006, People’s Republic of China
| | - Youliang Xie
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
| | - Huijun Liao
- Department of Clinical Pharmacy and Pharmaceutical Services, Huazhong University of Science and Technology Union Shenzhen Hospital (the 6th affiliated Hospital of Shenzhen University), Shenzhen, People’s Republic of China
| | - Jianhui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, People’s Republic of China
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, People’s Republic of China
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, People’s Republic of China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People’s Republic of China
- Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan, 523808, People’s Republic of China
| |
Collapse
|
4
|
Ai G, Huang R, Xie J, Zhong L, Wu X, Qin Z, Su Z, Chen J, Yang X, Dou Y. Hypouricemic and nephroprotective effects of palmatine from Cortex Phellodendri Amurensis: A uric acid modulator targeting Keap1-Nrf2/NLRP3 axis. J Ethnopharmacol 2023; 301:115775. [PMID: 36198377 DOI: 10.1016/j.jep.2022.115775] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/19/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Palmatine (Pal) is a major bioactive alkaloid originated from ancient Chinese herbal medicine Cortex Phellodendri Amurensis (CPA), which has long been applied to treat hyperuricemia (HUA)-related diseases. Pal possesses potent anti-inflammatory and anti-oxidant effects against metabolic diseases. However, its potential beneficial effect against PO (potassium oxonate)/HX (hypoxanthine)-induced HUA remains elusive. AIM OF THE STUDY This study aimed to investigate the potential pharmacological effect and mechanism of Pal on PO/HX-induced HUA in mice. MATERIAL AND METHODS A mouse model of HUA was established by co-administration of PO/HX once daily for 7 consecutive days. The HUA mice were orally given three doses (25, 50 and 100 mg/kg) of Pal daily for a week. Febuxostat (Feb, 5 mg/kg) was given as a positive control. At the scheduled termination of the experiment, the whole blood, liver and kidney were collected for subsequent analyses. The concentrations of uric acid (UA), creatinine (CRE) and blood urea nitrogen (BUN), and activities of adenosine deaminase (ADA) and xanthine oxidase (XOD) were evaluated. Histopathological alterations of the kidney were detected by H&E staining. The inflammatory and oxidative stress status was detected by assay kits. Additionally, key proteins involved in the urate transporter, Keap1-Nrf2 and TXNIP/NLRP3 signaling pathways were evaluated by immunohistochemistry and Western blotting. Finally, molecular docking was employed to probe the binding characteristics of Pal and target proteins Keap1, NLRP3, URAT1 and HO-1. RESULTS Administration of Pal substantially decreased the elevated kidney weight, lowered UA, CRE and BUN levels, and attenuated abnormal histopathological alterations. Meanwhile, treatment with Pal also dramatically lowered hepatic XOD and ADA activities. Besides, Pal treatment effectively mitigated the renal inflammatory and oxidative stress markers. Further mechanistic investigation indicated Pal distinctly downregulated the protein levels of GLUT9 and URAT1, while up-regulated the expression levels of OAT1 and ABCG2. Pal also restored Nrf2 activation, promoted subsequent expression of anti-oxidative enzymes, and downregulated the expressions of TXNIP, NLRP3, apoptosis-associated speck-like (ASC), caspase-1, IL-1β and IL-18. Molecular docking analysis also indicated Pal firmly bound with Keap1, NLRP3, URAT1 and HO-1. CONCLUSIONS These findings indicated that Pal exhibited favorable anti-HUA effect via modulating the expressions of transporter-related proteins and suppressing XOD activity. Furthermore, Pal also alleviated HUA-induced kidney injury, which was at least partially related to restoring Keap1-Nrf2 pathway and inhibiting TXNIP/NLRP3 inflammasome. Our investigation was envisaged to provide experimental support for the traditional application of CPA and CPA-containing classical herbal formulas in the management of HUA-related diseases and might provide novel dimension to the clinical application of Pal.
Collapse
Affiliation(s)
- Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Ronglei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Jianhui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, 510006, PR China
| | - Linjiang Zhong
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Xiaoyan Wu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Zehui Qin
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Xiaobo Yang
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, 510006, PR China.
| | - Yaoxing Dou
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China; The Second Clinical Medical College of Guangzhou University of Chinese Medicine/Post-Doctoral Research Station, Guangzhou, 510006, PR China.
| |
Collapse
|
5
|
Dou Y, Ai G, Huang R, Huang Z, Li Y, Liu Y, Xie J, Chen J, Su Z. In vitro and in vivo hypoglycemia effect of oxyberberine, a novel HO-1 agonist: A renewed evidence linking HO-1 to diabetes mellitus. Phytomedicine 2022; 101:154135. [PMID: 35509133 DOI: 10.1016/j.phymed.2022.154135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/19/2022] [Accepted: 04/24/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Oxyberberine (OBB), an important in vivo metabolite of berberine, exerts superior hypoglycemia effect. However, the underlying mechanism remains obscure. Heme oxygenase-1 (HO-1) holds a crucial status in the pathogenesis of diabetes. Previous research has indicated that OBB can specifically bind to hemoglobin and significantly up-regulated the HO-1 expression in diabetic rat. Based on cellular protection features of HO-1, this work aimed to probe the anti-diabetic effect of OBB and the association with the potential induction of HO-1 expression. METHODS A type 2 diabetic mellitus rat model was established. Glucolipid metabolism and insulin sensitivity were analyzed. Immunohistochemistry, Western blotting and in silico simulations were also performed. RESULTS Administration of OBB or HO-1 inducer hemin significantly reduced fasting blood glucose level, blood fat, and inflammatory cytokine levels, while increased antioxidant capacity of pancreas. Meanwhile, OBB treatment remarkably stimulated liver glycogenesis and inhibited gluconeogenesis. Besides, OBB improved the glucose utilizing of muscle. Noteworthily, OBB inhibited the islet cell apoptosis and improved pancreatic function. In addition, OBB effectively improved the consumption of glucose in insulin-resistant HepG2 cells. Moreover, OBB also reduced oxidative stress, promoted glucose-elicited insulin secretion and enhanced expression of β-cell function proteins in INS-1 cells. Nevertheless, these effects were significantly reversed by treatment with Zincprotoporphrin (ZnPP). Additionally, in silico simulations indicated that OBB exhibited superior affinity with HO-1. CONCLUSION OBB effectively ameliorated hyperglycemia, dyslipidemia, and insulin resistance, improved oral glucose tolerance, and maintained glucose metabolism homeostasis, at least in part, by promoting HO-1-mediated activation of phosphoinositide 3-kinase / protein kinase B (PI3K/Akt) and AMP-activated protein kinase (AMPK) pathways. These data eloquently suggest that OBB, as a novel HO-1 agonist, has good potential to be a promising candidate drug for the management of diabetes, and support a therapeutic role of HO-1 induction in diabetes that potentially paves the way to translational research.
Collapse
Affiliation(s)
- Yaoxing Dou
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; The Second Clinical Medical College of Guangzhou University of Chinese Medicine/Post-Doctoral Research Station, Guangzhou, China; Bone and Joint Research Team of Degeneration and Injury, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China
| | - Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ronglei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziwei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianhui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, China.
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China.
| |
Collapse
|
6
|
Cheng J, Ma X, Zhang H, Wu X, Li M, Ai G, Zhan R, Xie J, Su Z, Huang X. 8-Oxypalmatine, a novel oxidative metabolite of palmatine, exhibits superior anti-colitis effect via regulating Nrf2 and NLRP3 inflammasome. Biomed Pharmacother 2022; 153:113335. [PMID: 35779424 DOI: 10.1016/j.biopha.2022.113335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/18/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022] Open
Abstract
Palmatine (PAL) is an isoquinoline alkaloid derived from Fibraureae caulis Pierre that has been used to relieve inflammatory diseases like ulcerative colitis (UC). The metabolites of PAL were believed to contribute significantly to its outstanding biological activities. 8-Oxypalmatine (OPAL), a liver-mediated oxidative metabolite of PAL, has been firstly identified in the present work. We aimed to comparatively investigate the potential effect and mechanism of OPAL and PAL on dextran sodium sulfate (DSS)-induced colitis in Balb/c mice. Results indicated that OPAL and PAL effectively mitigated clinical manifestations, DAI scores and pathological damage compared with the model group. Moreover, treatment with OPAL and PAL effectively mitigated oxidative stress markers and inflammatory mediators in colon. Additionally, OPAL and PAL significantly activated the Nrf2 pathway, while substantially suppressed the activation of NLRP3 inflammasome. Furthermore, OPAL showed superior anti-colitis effect to PAL, which was similar to the positive drug mesalazine with much smaller dosage. These findings suggested that OPAL exerted appreciable protective effect on DSS-induced colitis, at least in part, via activating Nrf2 pathway and inhibiting NLRP3 inflammasome. OPAL might have the potential to be further developed into a promising candidate for the treatment of UC.
Collapse
Affiliation(s)
- Juanjuan Cheng
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Xingdong Ma
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Haitao Zhang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, PR China
| | - Xiaoyan Wu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Minhua Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Ruoting Zhan
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Jianhui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou 510120, PR China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China.
| | - Xiaoqi Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China; Dongguan Institute of Guangzhou University of Chinese Medicine, Dongguan 523808, PR China.
| |
Collapse
|
7
|
Ai G, Wu X, Dou Y, Huang R, Zhong L, Liu Y, Xian Y, Lin Z, Li Y, Su Z, Chen J, Qu C. Oxyberberine, a novel HO-1 agonist, effectively ameliorates oxidative stress and inflammatory response in LPS/D-GalN induced acute liver injury mice via coactivating erythrocyte metabolism and Nrf2 signaling pathway. Food Chem Toxicol 2022; 166:113215. [PMID: 35691465 DOI: 10.1016/j.fct.2022.113215] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/02/2022] [Accepted: 06/05/2022] [Indexed: 01/22/2023]
Abstract
Oxyberberine (OBB), a main gut-mediated metabolite of Phellodendron chinense Cortex (PC), exhibits prominent protective property against acute liver injury (ALI). Heme oxygenase-1 (HO-1) is a vital molecule in attenuating acute and chronic liver injury for its prominent anti-oxidative injury and anti-inflammation properties. The present study was performed to investigate the hepatoprotective role of OBB through HO-1 signaling pathway in lipopolysaccharide/D-galactosamine (LPS/D-GalN) induced ALI. Our results indicated that PC treatment improved survival rate and its metabolite OBB evidently improved histopathological deteriorations and liver function. Additionally, OBB dramatically ameliorated hepatic oxidative stress and inflammation. Besides, OBB exerted remarkable HO-1 agonistic activity, even be comparable to hemin (a HO-1 inducer), as evidenced by increased HO-1 level, carbon monoxide and bilirubin activities, which are the markers of erythrocyte metabolism. Moreover, OBB modulated the parameters of inflammation and oxidative stress through HO-1 dependent pathway. Beyond this, OBB also notably suppressed the translocation of p65, enhanced antioxidation defense genes expressions, promoted the degradation of Kelch-like ECH-associated protein 1 (Keap1) and the nuclear translocation of nuclear factor-erythroid-2-related factor 2 (Nrf2). In conclusion, OBB could be the principle active metabolite substance of PC and exert excellent hepatoprotective effects via inducing HO-1 through coactivation of erythrocyte metabolism and Nrf2/HO-1 pathway.
Collapse
Affiliation(s)
- Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Xiaoyan Wu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Yaoxing Dou
- The Second Clinical Medical College of Guangzhou University of Chinese Medicine/Post-Doctoral Research Station, Guangzhou, 510006, PR China
| | - Ronglei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Linjiang Zhong
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Yanfang Xian
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, PR China
| | - Zhixiu Lin
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, PR China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China.
| | - Chang Qu
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510630, PR China.
| |
Collapse
|
8
|
Ai G, Huang Z, Cheng J, Xie J, Zeng H, Liu Y, Li Y, Huang X, Chen J, Su Z. Gut Microbiota-Mediated Transformation of Coptisine Into a Novel Metabolite 8-Oxocoptisine: Insight Into Its Superior Anti-Colitis Effect. Front Pharmacol 2021; 12:639020. [PMID: 33859564 PMCID: PMC8042337 DOI: 10.3389/fphar.2021.639020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/15/2021] [Indexed: 01/22/2023] Open
Abstract
Coptisine (COP) is a bioactive isoquinoline alkaloid derived from Coptis Chinemsis Franch, which is traditionally applied for the management of colitis. However, the blood concentration of COP was extremely low, and its gut microbiota-mediated metabolites were thought to contribute to its prominent bioactivities. To comparatively elucidate the protective effect and underlying mechanism of COP and its novel gut microbiota metabolite (8-oxocoptisine, OCOP) against colitis, we used dextran sulfate sodium (DSS) to induce colitis in mice. Clinical symptoms, microscopic alternation, immune-inflammatory parameters for colitis were estimated. The results indicated that OCOP dramatically ameliorated disease activity index (DAI), the shortening of colon length and colonic histopathological deteriorations. OCOP treatment also suppressed the mRNA expression and release of inflammatory mediators (TGF-β, TNF-α, IL-6, IL-18, IL-1β and IFN-γ) and elevated the transcriptional and translational levels of anti-inflammatory cytokine (IL-10) as well as the mRNA expression levels of adhesion molecules (ICAM-1 and VCAM-1). Besides, the activation of NF-κB pathway and NLRP3 inflammasome was markedly inhibited by OCOP. Furthermore, OCOP displayed superior anti-colitis effect to COP, and was similar to MSZ with much smaller dosage. Taken together, the protective effect of OCOP against DSS-induced colitis might be intimately related to inhibition of NF-κB pathway and NLRP3 inflammasome. And the findings indicated that OCOP might have greater potential than COP to be further exploited as a promising candidate in the treatment of colitis.
Collapse
Affiliation(s)
- Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziwei Huang
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Juanjuan Cheng
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianhui Xie
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.,Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Huifang Zeng
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoqi Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| |
Collapse
|
9
|
Dou Y, Huang R, Li Q, Liu Y, Li Y, Chen H, Ai G, Xie J, Zeng H, Chen J, Luo C, Su Z. Oxyberberine, an absorbed metabolite of berberine, possess superior hypoglycemic effect via regulating the PI3K/Akt and Nrf2 signaling pathways. Biomed Pharmacother 2021; 137:111312. [PMID: 33524788 DOI: 10.1016/j.biopha.2021.111312] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/18/2021] [Accepted: 01/21/2021] [Indexed: 12/11/2022] Open
Abstract
Berberine (BBR) is a promising anti-diabetic isoquinoline alkaloid from Rhizoma coptidis, while its bioavailability was extremely low. Here, the existing form and pharmacokinetics of BBR were comparatively characterized in conventional and antibiotic-induced pseudo germ-free (PGF) rats. Furthermore, we comparatively investigated the antidiabetic effect and potential mechanism of BBR and its intestinal oxidative metabolite oxyberberine (OBB) in STZ-induced diabetic rats. Results showed that BBR and OBB existed mainly as protein-bound form in blood, while protein-bound OBB was significantly depleted in PGF rats. Treatment with OBB and BBR effectively decreased clinical symptoms of diabetic rats, reduced blood glucose level, ameliorated the pancreatic damage, and mitigated oxidative stress and inflammatory markers. However, the anti-diabetes effect of BBR was obviously compromised by antibiotics. In addition, OBB exerted superior anti-diabetes effect to BBR of the same dose, significantly up-regulated the mRNA expression of Nrf2 signaling pathway and substantially promoted the pancreatic levels of PI3K/Akt signaling pathway. In conclusion, BBR and its absorbed oxidative metabolite OBB were mainly presented and transported in the protein-bound form in vivo. The gut microbiota may play an important role in the anti-diabetes effect of BBR through transforming itself into the superior hypoglycemic metabolite OBB. OBB possessed favorable hypoglycemic and pancreatic β-cells protective effects, which may stand a huge potential to be further developed into a promising anti-diabetes candidate.
Collapse
Affiliation(s)
- Yaoxing Dou
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Ronglei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Qiaoping Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Yuhong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Yucui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Hanbin Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, SAR, PR China
| | - Gaoxiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Jianhui Xie
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Huifang Zeng
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Jiannan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China
| | - Chaodan Luo
- Subtropical Agricultural Products Processing Engineering Technology Center, Guangxi Institute of Subtropical Agricultural Products Processing, Guangxi Subtropical Crops Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, PR China.
| | - Ziren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, PR China.
| |
Collapse
|
10
|
Gan Y, Ai G, Wu J, Luo H, Chen L, Huang Q, Wu X, Xu N, Li M, Su Z, Liu Y, Huang X. Patchouli oil ameliorates 5-fluorouracil-induced intestinal mucositis in rats via protecting intestinal barrier and regulating water transport. J Ethnopharmacol 2020; 250:112519. [PMID: 31883475 DOI: 10.1016/j.jep.2019.112519] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 09/26/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Pogostemon cablin, commonly named "Guang-Huo-Xiang" in China, has long been renowned for its ability to dispel dampness and regulate gastrointestinal functions. Patchouli oil (P.oil), the major active fraction of Pogostemon cablin, has been traditionally used as the principal component of Chinese medicinal formulae to treat exterior syndrome and diarrhea. However, the effects of P.oil in treating 5-fluorouracil (5-FU)-induced intestinal mucositis have not yet been reported. AIM OF THE STUDY To investigate the protective effects of P.oil against 5-FU-induced intestinal mucositis and the mechanisms underlying these effects. MATERIALS AND METHODS Sprague-Dawley rats were intraperitoneally injected with 5-FU (30 mg/kg) to establish an intestinal mucositis model. Meanwhile, rats with intestinal mucositis were orally administered with P.oil (25, 50, and 100 mg/kg). Histological analysis, ELISA (for detecting inflammatory cytokines and aquaporins), immunohistochemistry analysis (for examining caspases), qRT-PCR analysis (for assessment tight junctions), and western blotting analysis (for the assessment of TLR2/TLR4-MyD88 and VIP-cAMP-PKA signaling pathway-related proteins) were performed to estimate the protective effects of P.oil against intestinal mucositis and the mechanisms underlying these effects. RESULTS The histopathological assessment preliminarily exhibited that P.oil alleviated the 5-FU-induced damage to the intestinal structure. After P.oil administration, the elevation of the expression of cytokines (TNF-α, IFN-γ, and IL-13) decreased markedly and the activation of NF-κB and MAPK signaling was significantly inhibited. P.oil also increased the mRNA expression of ZO-1 and Occludin, thereby stabilizing intestinal barrier. In addition, P.oil decreased the expressions of caspase-8, caspase-3, and Bax, and increased the expression of Bcl-2, thereby reducing the apoptosis of the intestinal mucosa. These results were closely related to the regulation of the TLR2/TLR4-MyD88 signaling pathway. It has been indicated that P.oil possibly protected the intestinal barrier by reducing inflammation and apoptosis. Furthermore, this study showed that P.oil inhibited the abnormal expression of AQP3, AQP7, and AQP11 by regulating the VIP-cAMP-PKA signaling pathway. Furthermore, it restored the intestinal water absorption, thereby alleviating diarrhea. CONCLUSIONS P.oil ameliorated 5-FU-induced intestinal mucositis in rats via protecting intestinal barrier and regulating water transport.
Collapse
Affiliation(s)
- Yuxuan Gan
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Gaoxiang Ai
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Jiazhen Wu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Huijuan Luo
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Liping Chen
- Faculty of Health Sciences, University of Macau, Macao, China
| | - Qionghui Huang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Xue Wu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Nan Xu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Minyao Li
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Ziren Su
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China; Dongguan & Guangzhou University of Chinese Medicine Cooperative Academy of Mathematical Engineering for Chinese Medicine, Dongguan, 523808, China
| | - Yuhong Liu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.
| | - Xiaoqi Huang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China; Dongguan & Guangzhou University of Chinese Medicine Cooperative Academy of Mathematical Engineering for Chinese Medicine, Dongguan, 523808, China.
| |
Collapse
|
11
|
Du C, Xu Y, Yang K, Chen S, Wang X, Wang S, Wang C, Shen M, Chen F, Chen M, Zeng D, Li F, Wang T, Wang F, Zhao J, Ai G, Cheng T, Su Y, Wang J. Estrogen promotes megakaryocyte polyploidization via estrogen receptor beta-mediated transcription of GATA1. Leukemia 2016; 31:945-956. [DOI: 10.1038/leu.2016.285] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022]
|
12
|
Wang Y, Su Y, Ai G, Ran X, Liu X, Cheng T. [An experimental study of the influence of burn on the expressions of IFN-gamma and IL-4 in T lymphocytes and on the expression of IL-12 in macrophages in mice]. Zhonghua Shao Shang Za Zhi 2001; 17:236-9. [PMID: 11876950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To investigate the influence of burn on the expressions of IFN-gamma and IL-4 in T lymphocytes and on the expression of IL-12 in macrophages in mice. METHODS The mice inflicted by 12% TBSA burn on the back were employed as the model. The peritoneal macrophages (PMphis) were isolated and counted under light microscope (LM). The gene expression level of IL-12 P35 and P40 subunits was determined with RT-PCR. The ratio of spleen to body and splenic histology were also determined. Splenic T lymphocytes were isolated and the gene expression levels of IFN-gamma and IL-4 in the T lymphocytes were examined by RT-PCR. RESULTS (1) PMphis decreased significantly on 3 postburn day (PBD) and recovered quickly thereafter. (2) The gene expressions of IL-12 P35 and P40 subunits in PMphis were enhanced obviously. (3) Splenic index increased evidently and the karyokinesis phase increased in splenic lymphocytes. (4) The expressions of IFN-gamma and IL-4 in splenic T lymphocytes increased postburn. CONCLUSION The expressions of IFN-gamma and IL-4 in splenic T lymphocytes and the expressions of IL-12 in PMphis could be enhanced by burn injury.
Collapse
Affiliation(s)
- Y Wang
- Institute of Combined Injury, The Third Military Medical University, Chongqing 400038, P. R. China
| | | | | | | | | | | |
Collapse
|
13
|
Ai G. National astronomical observatories in China. Science 2001; 293:214. [PMID: 11452977 DOI: 10.1126/science.293.5528.214a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
14
|
Abstract
The inhomogeneous distribution of brightness in a split-element filter is discussed. This inhomogeneity is caused by the off-axis effect of the birefringent crystal and can seriously affect astronomical observations in the case of a large field of view. For example, the maximal brightness fluctuation is ~9.44% in a full-disk solar telescope whose maximal incident angle is 70 arcmin. We also discuss ways to avoid this disadvantage.
Collapse
|
15
|
Lu S, Yu Y, Ai G, Wang W, Huang C, Zhang G, Zhao Y. [Restrictive fragment length polymorphism analysis of gamma-crystallin in congenital cataract families]. Yan Ke Xue Bao 1994; 10:98-101. [PMID: 7843402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Using gamma-crystallin gene probe P5G1, we investigated the RFLP in two large families of congenital cataracts and normal people, calculated the allelic gene frequency and defined the haplotypes by genetic linkage analysis. In accordance with foreign reports, TaqI/p5G1 detected 3 polymorphic sites, and the allelic gene frequency was close to that in foreign reports. However, foreign reports claimed that the haplotype P was linked to Coppock cataracts, but we did not find such linkage by haplotype analysis. The result suggests that not all the inherited cataracts are linked to gamma-crystallin gene, and the haplotype P should not be simply regarded as genetic marker in prenatal diagnosis.
Collapse
Affiliation(s)
- S Lu
- Department of Ophthalmology, 2nd Affiliated Hospital, Harbin, China
| | | | | | | | | | | | | |
Collapse
|