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Wang HR, Ma J, Guo YZ, Liu KF, Han B, Wang MH, Zou FH, Wang J, Tian Z, Qu HQ, Huang XL, Liu F. Combination of Albumin/Fibrinogen Ratio and Admission Hunt-Hess Scale Score as an Independent Predictor of Clinical Outcome in Aneurysmal Subarachnoid Hemorrhage. World Neurosurg 2024; 181:e322-e329. [PMID: 37839575 DOI: 10.1016/j.wneu.2023.10.047] [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: 09/27/2023] [Accepted: 10/08/2023] [Indexed: 10/17/2023]
Abstract
BACKGROUND The albumin/fibrinogen ratio (AFR) is an independent predictor of clinical outcomes of some diseases; however, the prognostic value of AFR and the admission Hunt-Hess (HH) score is still unclear for patients with an aneurysmal subarachnoid hemorrhage (aSAH). This study aimed to assess the relationship between the AFR-HH score and 6-month outcomes of aSAH patients. METHODS The clinical characteristics of aSAH patients admitted to our department between December 2017 and December 2021 were retrospectively analyzed. The candidate risk factors were screened using univariate regression analysis, and the independence of the resultant risk factors was evaluated by binary logistic regression analysis. The predictive value of the combined AFR and HH score for unfavorable outcomes was assessed using receiver operating characteristic curve analysis. RESULTS A total of 112 aSAH patients were included. Binary logistic regression analysis showed the perioperative period AFR, Glasgow coma scale score, and admission HH score were independent risk factors for unfavorable outcomes for aSAH patients. The receiver operating characteristic curve analysis showed the predictive capacity of AFR plus the admission HH score outperformed the AFR, Glasgow coma scale score, and admission HH scale alone and the combination of the AFR and Glasgow coma scale score. CONCLUSIONS A low AFR during the perioperative period is associated with unfavorable outcomes for aSAH patients at 6 months. The combination of the AFR and admission HH scale score provides superior predictive capacity to either the AFR or HH scale score alone.
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Affiliation(s)
- Hao Ran Wang
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Jie Ma
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Yi Zhuo Guo
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Ke Feng Liu
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Bin Han
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Ming Hai Wang
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Fei Hui Zou
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Jian Wang
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Zhen Tian
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - He Qi Qu
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Xian Long Huang
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China
| | - Fang Liu
- Department of Neurosurgery, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou, China.
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Chankeaw W, Guo YZ, Båge R, Svensson A, Andersson G, Humblot P. Elevated non-esterified fatty acids impair survival and promote lipid accumulation and pro-inflammatory cytokine production in bovine endometrial epithelial cells. Reprod Fertil Dev 2019; 30:1770-1784. [PMID: 30086824 DOI: 10.1071/rd17537] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 06/11/2018] [Indexed: 12/11/2022] Open
Abstract
Elevated non-esterified fatty acids (NEFAs) are associated with negative effects on bovine theca, granulosa and oviductal cells but the effects of NEFAs on bovine endometrial epithelial cells (bEECs) are not as well documented. The objective of this study was to define the effects of NEFAs on bEECs. Postprimary bEECs were treated with 150, 300 or 500µM of either palmitic acid (PA), stearic acid (SA) or oleic acid (OA) or a mixture of NEFAs (150µM of each FA) or 0.5% final concentration of vehicle ethanol (control). Viability and proliferation of bEECs exposed to 150µM of each NEFA or a mixture of NEFAs were unaffected. Increased lipid accumulation was found in all treated groups (P<0.01). In cells exposed to 500µM of each NEFA and 300µM PA decreased cell viability (P<0.001), proliferation (P<0.05) and increased apoptosis (P<0.05) were observed. Treatment with 500µM OA, PA and SA had the strongest effects on cell viability, proliferation and apoptosis (P<0.05). Treatment with PA and OA increased interleukin-6 (IL-6) concentrations (P<0.05), whereas only the highest concentration of PA, OA and SA stimulated IL-8 production (P<0.05). These results suggest that high concentrations of NEFAs may impair endometrial function with more or less pronounced effects depending on the type of NEFA and time of exposure.
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Affiliation(s)
- W Chankeaw
- Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7054, 750 07 Uppsala, Sweden
| | - Y Z Guo
- Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7054, 750 07 Uppsala, Sweden
| | - R Båge
- Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7054, 750 07 Uppsala, Sweden
| | - A Svensson
- Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7054, 750 07 Uppsala, Sweden
| | - G Andersson
- Department of Animal Breeding and Genetics, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7023, 750 07 Uppsala, Sweden
| | - P Humblot
- Department of Clinical Sciences, Faculty of Veterinary Medicine and Animal Sciences, Swedish University of Agricultural Sciences, SLU, P.O. Box 7054, 750 07 Uppsala, Sweden
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Li RP, Li YW, Guo YZ. PD-1 and PD-L1 expression on the prognosis of ovarian cancer. J BIOL REG HOMEOS AG 2019; 33:1161-1166. [PMID: 31309818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- R P Li
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
| | - Y W Li
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
| | - Y Z Guo
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
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Li WY, Li RP, Guo YZ. The effect of ulinastatin, a broad-spectrum protease inhibitor, on the expression of IL-6, CRP and NGAL in patients undergoing gynecological laparoscopic surgery. J BIOL REG HOMEOS AG 2019; 33:919-923. [PMID: 31190510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- W Y Li
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
| | - R P Li
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
| | - Y Z Guo
- Department of Gynaecology, Lanzhou University Second Hospital, Lanzhou City, China
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Wang JG, Guo YZ, Kong YZ, Dai S, Zhao BY. High non-esterified fatty acid concentrations promote expression and secretion of fibroblast growth factor 21 in calf hepatocytes cultured in vitro. J Anim Physiol Anim Nutr (Berl) 2017; 102:e476-e481. [PMID: 28447390 DOI: 10.1111/jpn.12699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 11/28/2016] [Accepted: 01/24/2017] [Indexed: 12/30/2022]
Abstract
Negative energy balance is considered as the pathological basis of energy metabolic disorders in periparturient dairy cows. Serum non-esterified fatty acids (NEFA) are one of the most important indicators of energy balance status. Fibroblast growth factor 21 (FGF21) has been identified as a hepatokine involved in regulation of metabolic adaptations, such as promoting hepatic lipid oxidation and ketogenesis, during energy deprivation. However, the direct effects of NEFA on FGF21 expression and secretion in bovine hepatocytes are not entirely clear. The objective of this study was to investigate the effects of different NEFA concentrations on FGF21 expression and secretion in calf hepatocytes cultured in vitro. NEFA were added to the culture solution at final concentrations of 0.6, 1.2, 1.8 and 2.4 mmol/L. After 24 hr of continuous culture, FGF21 mRNA and protein expression levels in the hepatocytes were determined by real-time PCR and Western blot respectively. FGF21 secretion in the supernatant was determined by enzyme-linked immunosorbent assay (ELISA). The results showed that expression and secretion of FGF21 at 0.6 mmol/L NEFA-treated hepatocytes was higher than that of the control group (p < .05). The FGF21 expression and secretion were similar at 1.2, 1.8 and 2.4 mmol/L NEFA-treated hepatocytes and significantly higher than those observed for controls (p < .01). These data suggest that high concentrations of NEFA significantly promote FGF21 expression and secretion in bovine hepatocytes. In particular, this promotion occurs in a dose-dependent manner and may be involved in the pathological processes of energy metabolism disorders of dairy cows in the peripartum period.
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Affiliation(s)
- J G Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Y Z Guo
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Y Z Kong
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - S Dai
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - B Y Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
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Dang JL, Gleason ML, Niu CK, Liu X, Guo YZ, Zhang R, Sun GY. Effects of Fungicides and Spray Application Interval on Controlling Marssonina Blotch of Apple in the Loess Plateau Region of China. Plant Dis 2017; 101:568-575. [PMID: 30677361 DOI: 10.1094/pdis-04-16-0464-re] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Marssonina blotch, caused by the fungus Marssonina coronariae, is a serious foliar disease on apple in East Asia as well as in other moist temperate regions in Asia, Europe, and South America. Several fungicides were investigated for their toxicity to mycelial growth and conidial germination of the pathogen in vitro. Tebuconazole, kresoxim-methyl, hexaconazole, propiconazole, and a mixture of tebuconazole and benziothiazolinone sharply inhibited mycelial growth but had less effect on conidial germination. Field tests were conducted in a commercial orchard in Baishui County, Shaanxi Province, China, during 2012, 2013, 2014, and 2015 in order to develop recommendations for apple growers. Three applications of tebuconazole, hexaconazole, propiconazole, or a mixture of tebuconazole and benziothiazolinone at 20-day intervals from early July to late August resulted in defoliation incidence of <5%. When sprays of Bordeaux mixture + tebuconazole, Bordeaux mixture + propiconazole, and Bordeaux mixture + tebuconazole and benziothiazolinone were alternated, the spray interval was extended to 25 days and defoliation incidence remained <5%. Based on historical records and our results, scouting for symptoms should begin in mid-June. We recommend commencing the spray period in early July in years with normal rainfall patterns, and spraying in mid- to late June in years with much rainfall. The findings of this study create a foundation for implementation of an efficient spray program against Marssonina leaf blotch in apple orchards in the Loess Plateau Region of China.
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Affiliation(s)
- J L Dang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - M L Gleason
- Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011
| | - C K Niu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University
| | - X Liu
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University
| | - Y Z Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University
| | - R Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University
| | - G Y Sun
- State Key Laboratory of Crop Stress Biology in Arid Areas and College of Plant Protection, Northwest A&F University
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Peng HX, Wei XY, Xiao YX, Sun Y, Biggs AR, Gleason ML, Shang SP, Zhu MQ, Guo YZ, Sun GY. Management of Valsa Canker on Apple with Adjustments to Potassium Nutrition. Plant Dis 2016; 100:884-889. [PMID: 30686143 DOI: 10.1094/pdis-09-15-0970-re] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Valsa canker, caused by the fungus Valsa mali, is one of the most destructive diseases of apple in the primary production areas of China and other East Asian countries. Currently, there are no effective control methods for this disease. We investigated the occurrence of Valsa canker in 24 apple orchards in Shaanxi Province in concert with foliar nutrient analysis, and found that there was a significant negative correlation of leaf potassium (K) content with incidence and severity of Valsa canker. Fertilization experiments showed that increasing tree K content enhanced resistance to pathogen colonization and establishment. Apple trees with leaf K content greater than 1.30% exhibited almost complete resistance to Valsa mali. Field trials demonstrated that increasing K fertilization could significantly reduce disease incidence. Improved management of tree nutrition, especially K content, could effectively control the occurrence and development of Valsa canker.
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Affiliation(s)
- H X Peng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - X Y Wei
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Y X Xiao
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Y Sun
- Faculty of Science, National University of Singapore, Singapore 117543
| | - A R Biggs
- Kearneysville Tree Fruit Research and Education Center, West Virginia University, Kearneysville 25443
| | - M L Gleason
- Department of Plant Pathology and Microbiology, Iowa State University, Ames 50011
| | - S P Shang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University
| | - M Q Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University
| | - Y Z Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University
| | - G Y Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University
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Wei YK, Ma HL, Guo YZ, Yang BH, Pang WX. Association of the IGF-1 rs35767 and rs972936 polymorphisms with the risk of osteoporosis in a Chinese postmenopausal female population. Genet Mol Res 2015; 14:14325-30. [PMID: 26600491 DOI: 10.4238/2015.november.13.17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of our study was to conduct a case-control study in a Chinese postmenopausal population to evaluate the roles of the IGF-1 rs35767 and rs972936 polymorphisms on bone mineral density (BMD) levels and osteoporosis risk. A total of 272 consecutive postmenopausal women with a primary diagnosis of osteoporosis and 272 controls were enrolled in the study between 2012 and 2014. The polymerase chain reaction-restriction fragment length polymorphism method was used to genotype the rs35767 and rs972936 IGF-1 polymorphisms. By comparing the demographic characteristics between patients and controls, patients with osteoporosis were found to be more likely to have a habit of alcohol drinking (P = 0.023). Furthermore, the BMD levels of the L1-L4 vertebrae, femoral necks, total hips, and trochanters in patients with osteoporosis were significantly lower than those in controls. By conditional regression analysis, we found that the IGF-1 rs2288377 and rs972936 gene polymorphisms were not associated with the risk of osteoporosis (P < 0.05). However, the CT+TT genotype of rs35767 and the AG+GG genotype of rs972936 were significantly associated with lower BMD levels in the femoral neck. Overall, our study suggests that IGF-1 rs2288377 and rs972936 gene polymorphisms do not influence the risk osteoporosis.
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Affiliation(s)
- Y K Wei
- Department of Orthopaedics, 3201 Affiliated Hospital, School of Medicine, Xiꞌan Jiaotong University, Hanzhong, China
| | - H L Ma
- Hangzhong Vocational and Technical College, Hanzhong, China
| | - Y Z Guo
- Hangzhong Zhenba Orthopaedic Hospital, Hanzhong, China
| | - B H Yang
- Department of Orthopaedics, 3201 Affiliated Hospital, School of Medicine, Xiꞌan Jiaotong University, Hanzhong, China
| | - W X Pang
- Hangzhong Zhenba Orthopaedic Hospital, Hanzhong, China
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Dong FQ, Zhang YH, Li ZA, Hou ZZ, He XJ, Guo YZ. Evaluation of normal fetal pulmonary veins from the early second trimester by enhanced-flow (e-flow) echocardiography. Ultrasound Obstet Gynecol 2011; 38:652-657. [PMID: 21337442 DOI: 10.1002/uog.8965] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/02/2011] [Indexed: 05/30/2023]
Abstract
OBJECTIVES To explore the feasibility of using enhanced-flow (e-flow) imaging technology to identify fetal pulmonary veins and establish gestational age-specific reference values at 12-40 weeks' gestation. METHODS The pulmonary venous internal diameter, peak systolic and diastolic flow velocities and visualization rate were analyzed in 332 normal fetuses at 12-40 weeks of gestation. Two-dimensional gray-scale (2D) ultrasound, color Doppler and e-flow imaging were used to detect the pulmonary veins in the four-chamber view by taking the lung as the penetration window. RESULTS The pulmonary veins could be visualized as early as 12 weeks' gestational age by e-flow imaging. The right and left pulmonary venous internal diameters and peak systolic and diastolic flow velocities increased with increasing gestational age. Between 12 and 40 gestational weeks, the internal diameter and both the systolic and diastolic flow velocities of the fetal right pulmonary vein were significantly larger than were those of the left vein (P < 0.05). Of 118 fetuses at 12-22 gestational weeks, the visualization rate of the four pulmonary veins (left superior and inferior, right superior and inferior) was 5.9% (7/118) by 2D ultrasound, 41.5% (49/118) by color Doppler and 61.9% (73/118) by e-flow imaging. The visualization rate by e-flow imaging was significantly higher than that using the other two techniques (P < 0.001). CONCLUSION e-flow imaging is apparently a feasible and promising technology with which to identify the fetal pulmonary veins in the early stages of the second trimester.
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Affiliation(s)
- F Q Dong
- Department of Functional Test, Children's Hospital of Hebei Province, Shijiazhuang, China.
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Abstract
Scutellaria planipes, a species of Scutellaria, was explored by comparing to Scutellaria baicalensis, a pharmacopoeia species. Four principle flavonoids in both the plant roots were analyzed by using a reversed-phase chromatographic system with a chemically bonded ODS silica gel column and phosphate buffer:methanol (68:32 and 1:1) as mobile phase. Their contents were similar in both plant roots. Antiallergic and antibacterial activities in vitro and acute toxicity were compared. The results provided valuable data for S. planipes as a potential medicinal resource.
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Affiliation(s)
- Y Y Zhang
- Shenyang Pharmaceutical University, China
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11
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Zhang YY, Guo YZ, Ageta H, Harigaya Y, Onda M, Hashimoto K, Ikeya Y, Okada M, Maruno M. Studies on the constituents of roots of Scutellaria planipes. Planta Med 1997; 63:536-9. [PMID: 17252377 DOI: 10.1055/s-2006-957758] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
From the roots of Scutellaria planipes (L.), three new flavonoids, 5,7,3',6'-tetrahydroxy-6,8,2'-trimethoxyflavone, (2 R,3 R)-3,5,7,2',5'-pentahydroxyflavanone and 7,2'-dihydroxy-5-methoxyflavone were isolated, together with ten known flavonoids, skullcapflavone I, wogonin, baicalein, norwogonin, viscidulin III, 5,7,2',6'-tetrahydroxy-flavone, 3,5,7,2',6'-pentahydroxyflavone, wogonin 7- O-beta- D-glucuronide, baicalin, baicalein 7- O-beta- D-glucopyranoside, and three phenethyl alcohol glycosides, acteoside, martynoside, and jionoside D. The structures were elucidated by spectroscopic methods.
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Affiliation(s)
- Y Y Zhang
- Shenyang Pharmaceutical University, Shenyang 110015, China
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Francesconi LC, Yang YY, Kung MP, Zhang XX, Billings JJ, Guo YZ, Kung HF. Technetium-99m N,N'-bis(2-mercapto-2-methylpropyl)-2-aminobenzylamine: technetium-99m complexes of a novel bis(aminoethanethiol) ligand. J Med Chem 1994; 37:3282-8. [PMID: 7932555 DOI: 10.1021/jm00046a012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A new N2S2 ligand system, N,N'-bis(2-mercapto-2-methylpropyl)-2- aminobenzylamine, U-BAT, 1, containing uneven amine groups (two amine groups with different pKa values) for complexing [TcVO]3+, was prepared. The reaction of this novel ligand with [99mTc]pertechnetate, in the presence of stannous tartrate as the reducing agent, produces the neutral and lipid-soluble [99mTc]TcVO(U-BAT), TcS2C15H23N2O, 2. However, when the same reaction was carried out at a higher pH, 9-10, and with 30 min of heating (100 degrees C), a second neutral but more lipid-soluble complex, [99mTc]TcVO(OU-BAT), TcS2C15H21N2O, 3, was isolated. The X-ray crystallography data of the 99Tc complexes show square pyramidal coordination with N2S2 as the base and the Tc = O in the apical position. Compound 3 can be derived from 2 by an oxidation of the ligand to form an imine. After iv injection into rats, the neutral and lipid-soluble technetium-99m complexes showed significant brain uptake, 1.54 and 1.07% dose/organ at 2 min for [99mTc]TcVO(U-BAT) and TcVO(OU-BAT), respectively. The novel Tc chemistry of this new ligand system may provide a useful foundation for designing Tc complexes with a built-in redox mechanism.
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Affiliation(s)
- L C Francesconi
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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Abstract
Preliminary study of iodine-123 labeled IBF, (S)-5-iodo-7-N-[(1-ethyl-2-pyrrolidinyl)methyl] carboxamido-2, 3-dihydrobenzofuran, has demonstrated the potential of using this agent to evaluate the status of the CNS D-2 dopamine receptor in humans. To further characterize this ligand and evaluate single-photon emission tomography (SPET) quantitation, a detailed biodistribution study in monkeys (Macaca fascicularis) with 123I- and 125I-IBF was performed. The dual tracer was simultaneously injected for in vivo imaging, bio-distribution, and ex vivo autoradiography in the same monkey. After the injection, SPET data (10 min/frame x 15) were collected with a triple-head gamma camera. Dynamic imaging data indicated that IBF localized in basal ganglia (BG) with a half life of 90-120 min. Other regions, i.e., cerebellum (CB) and cortex (CX), showed very low uptake. At 2.2 h after the injection, the monkey was sacrificed. Organ distribution data indicated that, as expected, there was a significant uptake in basal ganglia (0.029% ID/g), and the BG/CB and BG/CX ratios were 17.8 and 14.2 respectively. Lower ratios were obtained from SPET image analysis (BG/CB = 3.5 at 2.5 h). The eye uptake was observed with SPET, but was only quantified on autoradiograms with significant uptake (0.017% ID/g). Autoradiography of the eye demonstrated that predominant uptake was localized in the ciliary body and the choroid. The selective retention and high BG/CB ratio of 123I-IBF make it a useful agent for in vivo D-2 dopamine receptor imaging with SPET.
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Affiliation(s)
- J J Billings
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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Guo YZ, Kung MP, Cheng H, Pfeiffer N, Mozley D, Kung HF. A simplified method for quantitation of iodine-123 iodobenzamide in human plasma: a technical note. Eur J Nucl Med 1993; 20:373-8. [PMID: 8519255 DOI: 10.1007/bf00208994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To establish a quantitative single-photon emission tomography (SPET) procedure for imaging CNS D2 dopamine receptors, measurement of unchanged iodine-123 iodobenzamide (123I-IBZM) (a selective D2 ligand) in human plasma was investigated. There are three possible radioactive components in human plasma: hydrophilic compounds (iodide ion, etc.), lipophilic metabolites, and unchanged IBZM. Based on the difference in lipophilicity of IBZM and its lipophilic metabolites (LM), a new quantitative method of analysis of 123I-IBZM using a simple solvent extraction was developed. The selective extraction was achieved with n-octane/phosphate buffer (0.1 M, pH 7.4). Extraction efficiency was 93.2% +/- 0.3% (n = 15) for IBZM from plasma, while 99.3% +/- 0.2% (n = 12) of LM remained in the aqueous plasma fraction. Twenty-one confirmation tests with plasma containing known ratios of IBZM/LM, ranging between 0.39 and 7.60, were performed. The experimental results were very close to the values of the true ratios over the wide range (accuracy approximately 99%, relative standard error 6.6%). The data from this simplified method are comparable to those obtained by the high-performance liquid chromatography method. This improved method provides an easy and accurate way to quantify unchanged IBZM in human plasma. With appropriate kinetic modeling and in conjunction with a dedicated SPET imaging device for measuring quantitative information, it may be possible to develop a practical method for measuring D2 receptor density in vivo.
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Affiliation(s)
- Y Z Guo
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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Canney DJ, Billings J, Francesconi LC, Guo YZ, Haggerty BS, Rheingold AL, Kung HF. Dicarboxylate diamide dimercaptide (N2S2) technetium-99m complexes: synthesis and biological evaluation as potential renal radiopharmaceuticals. J Med Chem 1993; 36:1032-40. [PMID: 8478903 DOI: 10.1021/jm00060a011] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Novel diamide dimercaptide (N2S2) ligands 4, 5, and 8 have been synthesized and evaluated as potential renal radiopharmaceuticals. The target compounds were prepared in modest overall yields of 22%, 19%, and 20%, respectively, using readily available starting materials. Following in situ deprotection, 99mTc complexes of high radiochemical purity were obtained in excellent yield and were found to be stable for up to 6 h. The 99Tc complex of ligand 8 was isolated as the AsPh4 salt. The X-ray crystallographic data for [99TcO(8)]AsPh4 (space group P2(1)/n: Z = 4, a = 9.342(3) A; b = 18.594(5) A; c = 18.417(7) A; beta, deg = 90.61(3); V, A3 = 3199.1(20)) show that the Tc is bound to both thiolate sulfur atoms and to two deprotonated amide nitrogen atoms. The coordination geometry about the Tc is square-pyramidal with an -yl oxygen atom in the apical position. The Tc-N bond distances (2.002(12) and 1.984(12) A), the Tc-S bond distances (2.300(5) and 2.286(5) A), and the Tc-O bond distance (1.667(11) A) are in good agreement with bond lengths reported for similar complexes. The carboxylate groups are not bonded to the Tc atom in the solid state, nor in CDCl3 solution, as evidenced by X-ray crystal data and solution NMR data, respectively. In the solid state, [99TcO(8)]AsPh4 is monoanionic, therefore, at physiological pH, [99mTcO(8)] is presumably trianionic. Biodistribution studies performed in rats with the 99mTc complexes revealed slow blood clearance and high muscle uptake for these agents. Modest hepatobiliary excretion was observed, and low quantities of the complexes were found in the heart, lungs, and spleen after 1 h. The urinary excretion of the 99mTc complexes of ligands 4, 5, and 8 was found to be slow when compared to the excretion of [131I]OIH in rats (22%, 22%, and 32% vs 85-86%, respectively). Protein binding of 99mTc complexes of ligands 4, 5, and 8 in both rat and monkey plasma was found to be similar to MAG3. While the synthetic schemes reported here supply facile routes to novel N2S2 ligands, biodistribution studies of the 99mTc complexes performed on rats revealed slow renal excretion rates, accompanied by slow blood clearance and high uptake in muscle tissue. Preliminary planar imaging studies in monkeys also revealed slow renal excretion for these agents. The 99mTc complexes evaluated here are poor candidates as renal radiopharmaceuticals.
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Affiliation(s)
- D J Canney
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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16
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Mach RH, Kung HF, Jungwiwattanaporn P, Guo YZ. Synthesis and biodistribution of a new class of 99mTc-labeled fatty acid analogs for myocardial imaging. Int J Rad Appl Instrum B 1991; 18:215-26. [PMID: 2026498 DOI: 10.1016/0883-2897(91)90082-v] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A series of 99mTc-bis(aminoethanethiol)-fatty acid (99mTc-BAT-fatty acid) analogs were synthesized and evaluated as potential tracers of myocardial metabolism. The BAT-fatty acid precursors were prepared using a new synthetic route that avoids the use of strong reducing agents such as lithium aluminum hydride. Biodistribution studies of the no-carrier-added 99mTc-complexes were conducted in rats using [125I]IPPA as an internal standard. The myocardial uptake of the 99mTc-BAT-fatty acid analogs was significantly less than that of [125I]IPPA and indicates the 99mTc analogs are not suitable candidates for SPECT-based myocardial imaging studies.
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Affiliation(s)
- R H Mach
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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17
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Chumpradit S, Kung HF, Billings J, Guo YZ, Wu Y, Shih J. Preparation and biodistribution of 1-[2-(3-[125I]iodo-4-aminophenyl)ethyl]-4-[3-(trifluoromethyl) phenyl]piperazine and 1-[2-(3-[125I]iodo-4-azidophenyl)ethyl]-4-[3-(trifluoromethyl)phenyl] piperazine. J Med Chem 1989; 32:543-7. [PMID: 2918500 DOI: 10.1021/jm00123a006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The iodinated analogue of 1-[2-(4-aminophenyl)ethyl]-4-[3-(trifluoromethyl)phenyl]piperazine (PAPP), IPAPP (4), and the corresponding azido compound azido-IPAPP (5) were synthesized. The corresponding no-carrier-added 125I (T1/2 = 60 days, 35-60 keV) labeled compounds were also prepared. High specific binding was observed from in vitro binding studies using rat brain tissue preparation; Ki = 20 and 17.5 nM against [3H]-5-HT. In vivo biodistribution studies in rats showed that azido-[125I]IPAPP passed through intact blood-brain barrier and localized in the brain. Ex vivo autoradiography of rat brain sections exhibited a diffuse uptake pattern, which may be due to specific and nonspecific binding. The results indicate that IPAPP and azido-IPAPP may not be suitable to image the serotonin receptor in the brain.
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Affiliation(s)
- S Chumpradit
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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Kung HF, Guo YZ, Yu CC, Billings J, Subramanyam V, Calabrese JC. New brain perfusion imaging agents based on 99mTc-bis(aminoethanethiol) complexes: stereoisomers and biodistribution. J Med Chem 1989; 32:433-7. [PMID: 2913304 DOI: 10.1021/jm00122a024] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In developing new brain perfusion imaging agents, we prepared 99mTc complexes of racemic mixtures of bis(aminoethanethiol) (BAT) derivatives containing an N'-benzylpiperazinyl (BPA) side chain. Due to the presence of a chiral center, a mixture of diastereomers (syn and anti) following chelation with the 99mTc (no-carrier-added) was obtained. The neutral and lipid-soluble 99mTc-BPA-BAT (99mTc, T1/2 = 6 h) isomers were separated. The syn and anti isomers of carrier-added 99Tc-BPA-BAT (99Tc, T1/2 = 2 x 10(5) years) were also synthesized, separated, and crystallized. The X-ray crystallography of 99Tc-BPA-BAT showed the syn and anti conformations (in relationship with the central TC(=O)N2S2 core). Despite a similarity in the partition coefficients for the two isomers, the syn isomer showed a higher in vivo brain uptake and longer brain retention in rats (2.77 and 1.08% dose/organ at 2 and 15 min) than that of the corresponding anti isomer (0.57 and 0.27% dose/organ at 2 and 15 min). This information is important and should be taken into consideration when new 99mTc-labeled brain perfusion imaging agents are being designed.
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Affiliation(s)
- H F Kung
- Department of Nuclear Medicine, SUNY, Buffalo 14215
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Mach RH, Kung HF, Guo YZ, Yu CC, Subramanyam V, Calabrese JC. Synthesis, characterization and biodistribution of neutral and lipid-soluble 99mTc-PAT-HM and 99mTc-TMR for brain imaging. Int J Rad Appl Instrum B 1989; 16:829-37. [PMID: 2621118 DOI: 10.1016/0883-2897(89)90168-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two new ligand systems for complexation with 99mTc were prepared. The two analogs of bisaminoethanethiol (BAT): N,N'-bis(2-methyl-2-mercaptopropyl)-2,2-dimethylpropylenediamin e (PAT-HM) and N,N'-bis[2-(2-ethyl-1-mercaptopropyl)] ethylenediamine (TMR), form neutral and lipid soluble complexes with 99mTc that readily penetrate the blood-brain barrier following i.v. injection into rats. Although the 99mTc chelates do not display the prolonged brain retention required for use in single photon emission computed tomographic imaging studies, the fact that each ligand forms a neutral and lipid-soluble complex of high chemical stability when coordinated with 99mTc warrants further investigation to increase the site- and organ-specificity of these agents.
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Affiliation(s)
- R H Mach
- Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104
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20
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Kung HF, Kasliwal R, Pan SG, Kung MP, Mach RH, Guo YZ. Dopamine D-2 receptor imaging radiopharmaceuticals: synthesis, radiolabeling, and in vitro binding of (R)-(+)- and (S)-(-)-3-iodo-2-hydroxy-6-methoxy-N- [(1-ethyl-2-pyrrolidinyl)methyl]benzamide. J Med Chem 1988; 31:1039-43. [PMID: 2966245 DOI: 10.1021/jm00400a027] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In developing central nervous system (CNS) dopamine D-2 receptor imaging agents, enantiomers, R-(+) and S-(-) isomers, of 3-[125I]iodo-2-hydroxy-6-methoxy-N-[(1-ethyl-2- pyrrolidinyl)methyl]benzamide, [125I]IBZM, were synthesized, and their in vitro binding characteristics were evaluated in rat striatum tissue preparation. The (S)-(-)-[125I]IBZM showed high specific dopamine D-2 receptor binding (Kd = 0.43 nM, Bmax = 0.48 pmol/mg of protein). Competition data of various ligands for IBZM binding displayed the following rank order of potency: spiperone greater than (S)-(-)-IBZM greater than (+)-butaclamol much greater than (R)-(+)-IBZM greater than (S)-(-)-BZM greater than dopamine greater than ketanserin greater than SCH23390 much greater than propanolol. The results indicate that [125I]IBZM binds specifically to the dopamine D-2-receptor with stereospecificity. The [123I]IBZM is potentially useful as an imaging agent for the investigation of dopamine D-2 receptors in humans.
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Affiliation(s)
- H F Kung
- Department of Radiology, University of Pennsylvania, Philadelphia 19104
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Kung HF, Guo YZ, Billings J, Xu X, Mach RH, Blau M, Ackerhalt RE. Preparation and biodistribution of [125I]IBZM: a potential CNS D-2 dopamine receptor imaging agent. Int J Rad Appl Instrum B 1988; 15:195-201. [PMID: 2966782 DOI: 10.1016/0883-2897(88)90088-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A new CNS D-2 dopamine receptor imaging agent [125I]IBZM, (S)-3-[125I]-iodo-N-[(1-ethyl-2-pyrrolidinyl)] methyl-2-hydroxy-6-methoxybenzamide, was prepared by either an exchange reaction or by the chloramine-T method. After an i.v. injection, the agent easily passed through the blood-brain barrier and localized in the rat brain. At 2, 15, 30 and 60 min after the injection, the brain uptake was 2.9, 2.3, 1.8 and 0.7% dose/organ, respectively. Regional uptake ratio of striatum/cerebellum (target to nontarget ratio) increased from 1.4 at 30 s to 10.3 at 2 h after the i.v. injection. Digital autoradiography of rat brain sections showed high regional uptake in the caudate putamen and accumbens nucleus, areas known to have a high concentration of the D-2 dopamine receptor. The specific uptake at the D-2 dopamine receptor site was blocked by pretreatment with spiperone, a selective D-2 antagonist. When labeled with 123I (t1/2 = 13 h, 159 keV), [123I]IBZM may be useful for imaging the CNS D-2 dopamine receptor.
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Affiliation(s)
- H F Kung
- Department of Nuclear Medicine, SUNY, Buffalo
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Kung HF, Billings JJ, Guo YZ, Mach RH. Comparison of in vivo D-2 dopamine receptor binding of IBZM and NMSP in rat brain. Int J Rad Appl Instrum B 1988; 15:203-8. [PMID: 2966783 DOI: 10.1016/0883-2897(88)90089-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In vivo biodistribution of S- and R-isomers of [125I]IBZM in rats showed a significant initial brain uptake (3.20 and 2.67% dose/organ at 2 min, respectively). The wash-out from the brain was slower for the S-isomer. The striatum to cerebellum ratio for [125I]S-IBZM decreased with an increasing dose of cold carrier or spiperone, suggesting that the brain uptake is stereospecific and saturable, and may be related to the binding of D-2 dopamine receptors. In a dual isotope digital autoradiography study [125I]IBZM and [3H]NMSP(N-methylspiperone) show comparable regional cerebral distribution in rats.
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Affiliation(s)
- H F Kung
- Department of Nuclear Medicine, SUNY, Buffalo
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Zhao JF, Guo YZ, Meng XS. [The toxic principles of Bupleurum longiradiatum]. Yao Xue Xue Bao 1987; 22:507-11. [PMID: 3450149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Efange SM, Kung HF, Billings J, Guo YZ, Blau M. Technetium-99m bis (aminoethanethiol) complexes with amine sidechains--potential brain perfusion imaging agents for SPECT. J Nucl Med 1987; 28:1012-9. [PMID: 3108466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
In an effort to develop new clinically useful technetium-99m bis(aminoethanethiol) ([99mTc]BAT) complexes for the evaluation of regional cerebral perfusion, two new BAT ligands containing amines in the sidechain were synthesized and subsequently complexed with 99mTc to yield the target complexes: [99mTc]DEA and [99mTc]TMPDA. Each complex was obtained as mixtures of two isomers, syn and anti, which were separated chromatographically. In biodistribution studies, both isomers of [99mTc]TMPDA showed little uptake in the brain. In contrast, the brain uptake values at 2 and 15 min for [99mTc]DEA-anti were 0.99 and 0.26, whereas, the corresponding values for DEA-syn were 2.27, 0.64% dose/organ, respectively. Autoradiographic studies (in rats) using both isomers of [99mTc]DEA show a fixed regional distribution and a higher concentration of radioactivity in the gray matter relative to the white matter. Planar imaging using [99mTc]DEA-syn clearly demonstrates localization of the complex in the brain with a T 1/2 of 41 min, suggesting some potential for use with single photon emission computed tomography.
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25
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Wang BH, Guo YZ, Zhang TY. [Surgical management of postoperative alkaline reflux gastritis]. Zhonghua Wai Ke Za Zhi 1986; 24:376-7, 384. [PMID: 3816443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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Chen XR, Ni XY, Huang RX, Wang ZY, Gu J, Lin G, Zhang ZN, Fan MY, Lin SC, Xu JB, Shi WJ, Wang MK, Wu S, Wu PS, Wang BH, Zhang BY, Zhou MF, Guo YZ, Li CM, Chen KY, He YT, Guo LX, Ju CQ. [Percutaneous transhepatic cholangiography and drainage]. Zhonghua Fang She Xue Za Zhi 1983; 17:33-7. [PMID: 6224659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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27
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Guo YZ. [Adenolymphoma of parotid gland (clinical and pathological analysis of 65 cases) (author's transl)]. Zhonghua Kou Qiang Ke Za Zhi 1981; 16:222-4. [PMID: 6953001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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