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Lin L, Mo Z, Xiao J, Kou J, Guo C, He SM, Zhang W, Sun Y. Identification and Automated Delineation of Radioresistant Biological Tumor Volume in Nasopharyngeal Carcinoma Based on Magnetic Resonance Imaging Radiomics. Int J Radiat Oncol Biol Phys 2023; 117:e598-e599. [PMID: 37785804 DOI: 10.1016/j.ijrobp.2023.06.1958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Widespread use of intensity modulated radiotherapy (IMRT) has improved the tumor control rate of nasopharyngeal carcinoma (NPC). However, nearly 20% of the patients with local-advanced NPC would relapse after precise irradiation and 80% of the recurrent lesions occur within the high dose field, suggesting that there are radiation-resistant cancer cell subsets within the tumor. In this context, identification and contouring of radiation resistance region of NPC for dose escalation at primary IMRT could be advantageous. In this work, we proposed a two-step radiomics workflow to predict local relapse and the recurrent region of NPC before primary IMRT. MATERIALS/METHODS In this single-center, retrospective study, pre-treatment magnetic resonance (MR) sequences of T1-weighted imaging (T1-w) and contrast-enhanced T1-weighted imaging (CET1-w) were collected from 800 patients of newly diagnosed and non-metastatic NPC between April 2009 and December 2015. The primary gross tumor volume (GTVp) of all patients and the actual recurrent lesion (GTVr) of patients who suffered from local recurrence were manually contoured for further analysis. A two-step complete radiomics workflow was designed to predict tumor recurrence and segment the region. First, least absolute shrinkage and selection operator (LASSO) was utilized for radiomics features selection of GTVp and support vector machine (SVM) was adopted to predict the recurrence. If the model predicts a recurrence, then the workflow utilizes an improved 3D U-Net to segment the recurrent region. Area under receiver operating characteristic curve (ROC-AUC) was used to evaluate the performance of tumor recurrence prediction, and Dice similarity coefficient (DSC) was used to assess the consistence between the actual and predicted GTVr. RESULTS Of 800 NPC patients, 95 (11.9%) patients developed in-field local recurrence. For recurrence risk prediction, the SVM ensemble model (T1-w+CET1-w) was selected for further application with higher sensitivity. The average ROC-AUC, specificity, sensitivity of the SVM ensemble model in a 5-fold cross-validation and in the independent test set of 160 patients were 0.922, 0.922, 0.777 and 0.928, 0.915, 0.737, respectively. Moreover, for recurrent region segmentation, the multi-modality (T1-w+CET1-w) model was superior to the single-modality (T1-w or CET1-w) model. In an independent test set of 15 patients, the DSC, sensitivity and 95% Hausdorff Distance between actual and predicted GTVr was 0.549±0.176, 0.696±0.118 and 9.813±4.788 which was superior to 0.444±0.188, 0.497±0.218 and 12.047±5.361 of original 3D U-Net. CONCLUSION The proposed two-step radiomics workflow showed a good performance in predicting tumor recurrence of NPC. The predicted location of the recurrence lesion was all accurate, but there was still a certain difference between the volume of the automated delineated and actual GTVr, which needed to be further optimized to be used as biological tumor volume.
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Affiliation(s)
- L Lin
- Sun Yat-sen University Cancer Center; State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine; Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, Guangdong, 510060, China, Guangzhou, China
| | - Z Mo
- Shenzhen United Imaging Research Institute of Innovative Medical Equipment, Shenzhen, China
| | - J Xiao
- Shenzhen United Imaging Research Institute of Innovative Medical Equipment, Shenzhen, China
| | - J Kou
- Sun Yat-sen University Cancer Center, Guangzhou, China
| | - C Guo
- First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China
| | - S M He
- United Imaging Research Institute of Intelligent Imaging, Beijing, China
| | - W Zhang
- Shanghai United Imaging Healthcare Co., Ltd., Shanghai, China
| | - Y Sun
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
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Wang B, Cui L, Song Q, Liu M, Kou J, Sun S, Chen H, Shi Y, Wu Z, Dai Z. Excessive dietary L-tryptophan regulated amino acids metabolism and serotonin signaling in the colon of weaning piglets with acetate-induced gut inflammation. Amino Acids 2023; 55:403-412. [PMID: 36648538 DOI: 10.1007/s00726-023-03239-8] [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: 09/06/2022] [Accepted: 01/09/2023] [Indexed: 01/18/2023]
Abstract
L-Tryptophan (Trp) was shown to improve the gut barrier and growth of weaning piglets. However, whether excessive dietary Trp regulates amino acids (AAs) metabolism and gut serotonin (5-HT) homeostasis in piglets with gut inflammation is not clear yet. We hypothesize that excessive dietary Trp alleviates acetate-induced colonic inflammation and gut barrier damage in weaning piglets partially through the regulation of colonic AAs metabolism and 5-HT signaling. Fifty-four 21-day-old weaned piglets were divided into six groups: control, acetate, 0.2%Trp, 0.2%Trp + acetate, 0.4% Trp, and 0.4%Trp + acetate. Piglets were fed a basal diet supplemented with 0%, 0.2%, or 0.4% of Trp throughout the 12-day experiment. During days 0-7, all piglets had free access to diet and drinking water. On day 8, piglets were intrarectal administered with 10 mL of 10% acetate saline solution or 0.9% saline. During days 8-12, all piglets were pair-fed the same amount of feed per kg bodyweight. Results showed that excessive dietary Trp alleviated acetate-induced reductions in daily weight gain and increase in feed/gain ratio. Trp restored (P < 0.05) acetate-induced increase in concentrations of free aspartate, glutamate/glutamine, glycine, 5-HT, and 3-methylindole in the colon, downregulation of zonula occludens-1 and 5-HT reuptake transporter (SERT) expression and upregulation of IL-1β, IL-8, TLR4, and 5-HT receptor 2A (HTR2A) expression, and the increase in ratios of p-STAT3/ STAT3 and p-p65/p65 in the colon. The above findings suggested that excessive dietary Trp in the proper amount regulated colonic AAs metabolism, 5-HT homeostasis, and signaling that may contribute as important regulators of gut inflammation during the weaning transition.
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Affiliation(s)
- Bin Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Lu Cui
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Qingqing Song
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Moyan Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Jiao Kou
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Shiqiang Sun
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Hui Chen
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Yahui Shi
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Zhaolai Dai
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, People's Republic of China.
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Zhong Q, Kou J, Özdemir ŞK, El-Ganainy R. Hierarchical Construction of Higher-Order Exceptional Points. Phys Rev Lett 2020; 125:203602. [PMID: 33258627 DOI: 10.1103/physrevlett.125.203602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 09/28/2020] [Indexed: 06/12/2023]
Abstract
The realization of higher-order exceptional points (HOEPs) can lead to orders of magnitude enhancement in light-matter interactions beyond the current fundamental limits. Unfortunately, implementing HOEPs in the existing schemes is a rather difficult task, due to the complexity and sensitivity to fabrication imperfections. Here we introduce a hierarchical approach for engineering photonic structures having HOEPs that are easier to build and more resilient to experimental uncertainties. We demonstrate our technique by an example that involves parity-time symmetric optical microring resonators with chiral coupling among the internal optical modes of each resonator. Interestingly, we find that the uniform coupling profile is not required to achieve HOEPs in this system-a feature that implies the emergence of HOEPs from disorder and provides resilience against some fabrication errors. Our results are confirmed by using full-wave simulations based on Maxwell's equation in realistic optical material systems.
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Affiliation(s)
- Q Zhong
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931, USA
- Henes Center for Quantum Phenomena, Michigan Technological University, Houghton, Michigan 49931, USA
| | - J Kou
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125, USA
| | - Ş K Özdemir
- Department of Engineering Science and Mechanics, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - R El-Ganainy
- Department of Physics, Michigan Technological University, Houghton, Michigan 49931, USA
- Henes Center for Quantum Phenomena, Michigan Technological University, Houghton, Michigan 49931, USA
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Zhang M, Kou J, Wu Y, Wang M, Zhou X, Yang Y, Wu Z. Dietary genistein supplementation improves intestinal mucosal barrier function in Escherichia coli O78-challenged broilers. J Nutr Biochem 2019; 77:108267. [PMID: 32000135 DOI: 10.1016/j.jnutbio.2019.108267] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 03/27/2019] [Revised: 08/28/2019] [Accepted: 11/03/2019] [Indexed: 12/23/2022]
Abstract
Genistein has multiple biological activities in both humans and animals. However, a protective effect of genistein on Escherichia coli (E. coli)-induced intestinal mucosal barrier dysfunction remains unknown. In the present study, a total of 288 1-day-old male Arbor Acre broilers fed a corn-soybean basal diet unsupplemented or supplemented with 20 mg genistein/kg diet were subjected to E. coli serotype O78 (108 cfu per bird) infection or equal volume of sodium chloride at 19 days of age. Sera and tissue samples were collected 2 days after E. coli infection. Growth performance, index of immune-related organs, intestinal barrier permeability, protein level of inflammatory cytokines, sIgA, tight junction protein, and mRNA level of apoptotic genes in jejunum were determined. Mortality rate at 7 days post infection was recorded. The results showed that E. coli challenge led to a reduced average daily gain, a decreased thymus index, and bursal index in broilers, an increase of fluorescein isothiocyanate (FITC)-dextran in serum, and a decreased sIgA in jejunum. These effects were abrogated by genistein administration. Western blot results showed that E. coli infection led to increased protein level of claudin-1 and zonula occludens (ZO)-1, which was largely abolished by genistein. Moreover, E. coli infection resulted increased protein level of TNF-α and IL-6, enhanced mRNA level of Bax and caspase-3, as well as decreased mRNA level of Bcl-2 were abrogated by genistein in jujunum of broilers. In conclusion, the results indicate that genistein supplementation improves intestinal mucosal barrier function which is associated with a regulatory effect on tight junction proteins, sIgA, apoptosis, and secretion of inflammatory cytokines in jejunum of E. coli-challenged broilers.
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Affiliation(s)
- Ming Zhang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Jiao Kou
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Yujun Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Mengmeng Wang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Xiumin Zhou
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
| | - Ying Yang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China.
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, 100193, China
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He Y, Fan X, Liu N, Song Q, Kou J, Shi Y, Luo X, Dai Z, Yang Y, Wu Z, Wu G. l-Glutamine Represses the Unfolded Protein Response in the Small Intestine of Weanling Piglets. J Nutr 2019; 149:1904-1910. [PMID: 31334766 DOI: 10.1093/jn/nxz155] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 12/12/2018] [Revised: 01/25/2019] [Accepted: 06/11/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Dysfunction of the endoplasmic reticulum (ER) results in apoptosis, inflammation, and enhanced proteolysis in the small intestine of humans and animals. l-Glutamine (Gln) is required for intestinal mucosal homeostasis in piglets. However, a functional role of the ER in the enterocytes of weanling piglets and its contribution to intestinal mucosal integrity remain largely unknown. OBJECTIVE This study was conducted to test the hypothesis that preweaning administration of Gln alleviates the activation of unfolded protein response (UPR) in the small intestine of weanling piglets. METHODS Eighteen sow-reared piglets aged 7 d from 3 litters (6 piglets/litter) were assigned randomly into 1 of 3 treatment groups. Piglets were reared by sows until age 24 d, or were reared by sows and orally administered either l-alanine [1.84 g · kg body weight (BW)-1 · d-1] or Gln (1.52 g · kg BW-1 · d-1) twice daily between 7 and 21 d of age, and then weaned to a corn- and soybean meal-based diet. The small-intestinal samples were collected at 24 d of age for analyses of abundance of proteins related to ER stress and apoptosis, concentrations of inflammatory cytokines, and mRNA abundance for genes implicated in protein degradation. RESULTS Compared with age-matched suckling piglets, weaning stress increased apoptosis and decreased cell proliferation in the jejunum. The abundance of proteins related to ER stress [binding immunoglobulin protein, activating transcription factor 6α, phosphorylated (p)-inositol-requiring kinase 1α, and p-eukaryotic initiation factor 2α] was elevated by 200% to 320%, and that of apoptotic proteins (CCAAT/enhancer-binding protein homologous protein, p-Jun-N-terminal kinase, caspase-12, cleaved caspase-3, and Bcl-2-associated X) was augmented by 100% to 350% in the jejunum of weanling piglets. The protein abundance for IL-1β, TNF-α, and IL-8 was increased by 100% to 230% in the jejunum of weanling piglets. These alterations in gene and protein expression were markedly abrogated by Gln supplementation. The mRNA concentration of F-Box protein 32 in the jejunum of weanling piglets was increased by 70%, compared with the control group, and was not affected by Gln supplementation. CONCLUSION Our results indicate that preweaning administration of Gln to nursing piglets alleviates the weaning-activated UPR.
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Affiliation(s)
- Yu He
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Xiaoxiao Fan
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Ning Liu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Qingqing Song
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Jiao Kou
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Yahui Shi
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Xuan Luo
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Zhaolai Dai
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Ying Yang
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing, China
| | - Guoyao Wu
- State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing, China.,Department of Animal Science, Texas A&M University, College Station, TX, USA
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Zheng Y, Liu J, Cao ML, Deng JM, Kou J. Extrication process of chlorogenic acid in Crofton weed and antibacterial mechanism of chlorogenic acid on Escherichia coli. J Environ Biol 2016; 37:1049-1055. [PMID: 29989735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Crofton weed is a perennial herb and a biological intruding species. The present study firstly used the orthogonal test to compare the differences in extraction of chlorogenic acid in leaves and stems of Crofton weed by using three kinds of solvents, namely water, ethanol and ethyl acetate. The best effect was found by using ethonolic extraction of chlorogenic acid in Crofton weed. Further, by choosing Escherichia coli as test object, in-vitro antibacterial test was conducted to study the antimicrobial activities of chlorogenic acid by testing a series of indexes before and after the interaction between chlorogenic acid and Escherichia coli, to clarify the antibacterial mechanism of chlorogenic acid on Escherichia coli. Finally, by comparing the antibacterial activities of isochlorogenic acid A on Escherichia coli, it was concluded that both chlorogenic acid and isochlorogenic acid A showed antibacterial activities against Escherichia coli, wherein chlorogenic acid had a better antibacterial effect on Escherichia coli than isochlorogenic acid A.
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Kou J, Xu S, Sun T, Sun C, Guo Y, Wang C. A study of sodium oleate adsorption on Ca2+ activated quartz surface using quartz crystal microbalance with dissipation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.minpro.2016.06.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ma R, Li T, Cao M, Si Y, Wu X, Zhao L, Yao Z, Zhang Y, Fang S, Deng R, Novakovic VA, Bi Y, Kou J, Yu B, Yang S, Wang J, Zhou J, Shi J. Extracellular DNA traps released by acute promyelocytic leukemia cells through autophagy. Cell Death Dis 2016; 7:e2283. [PMID: 27362801 PMCID: PMC5108337 DOI: 10.1038/cddis.2016.186] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 05/27/2016] [Accepted: 05/31/2016] [Indexed: 12/30/2022]
Abstract
Acute promyelocytic leukemia (APL) cells exhibit disrupted regulation of cell death and differentiation, and therefore the fate of these leukemic cells is unclear. Here, we provide the first evidence that a small percentage of APL cells undergo a novel cell death pathway by releasing extracellular DNA traps (ETs) in untreated patients. Both APL and NB4 cells stimulated with APL serum had nuclear budding of vesicles filled with chromatin that leaked to the extracellular space when nuclear and cell membranes ruptured. Using immunofluorescence, we found that NB4 cells undergoing ETosis extruded lattice-like structures with a DNA-histone backbone. During all-trans retinoic acid (ATRA)-induced cell differentiation, a subset of NB4 cells underwent ETosis at days 1 and 3 of treatment. The levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were significantly elevated at 3 days, and combined treatment with TNF-α and IL-6 stimulated NB4 cells to release ETs. Furthermore, inhibition of autophagy by pharmacological inhibitors or by small interfering RNA against Atg7 attenuated LC3 autophagy formation and significantly decreased ET generation. Our results identify a previously unrecognized mechanism for death in promyelocytes and suggest that ATRA may accelerate ET release through increased cytokines and autophagosome formation. Targeting this cellular death pathway in addition to conventional chemotherapy may provide new therapeutic modalities for APL.
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Affiliation(s)
- R Ma
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - T Li
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - M Cao
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - Y Si
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - X Wu
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - L Zhao
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - Z Yao
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - Y Zhang
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - S Fang
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - R Deng
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - V A Novakovic
- Department of Research, Brigham and Women's Hospital, VA Boston Healthcare System, and Harvard Medical School, Boston, MA, USA
| | - Y Bi
- Department of Cardiology of the First Hospital, Harbin Medical University, Harbin, China
| | - J Kou
- Department of Cardiology of the Second Hospital, Harbin Medical University, Harbin, China
| | - B Yu
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - S Yang
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Heilongjiang Province, Harbin, China
| | - J Wang
- Department of Hematology of the Second Hospital, Harbin Medical University, Harbin, China
| | - J Zhou
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
| | - J Shi
- Department of Hematology of the First Hospital, Harbin Medical University, Harbin, China
- Department of Surgery, Brigham and Women's Hospital, VA Boston Healthcare System, and Harvard Medical School, Boston, MA, USA
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Lin Y, Jia R, Liu Y, Gao Y, Zeng X, Kou J, Yu B. Diosgenin inhibits superoxide generation in FMLP-activated mouse neutrophils via multiple pathways. Free Radic Res 2014; 48:1485-93. [DOI: 10.3109/10715762.2014.966705] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Song CL, Liu HH, Kou J, Lv L, Li L, Wang WX, Wang JW. Expression profile of insulin-like growth factor system genes in muscle tissues during the postnatal development growth stage in ducks. Genet Mol Res 2013; 12:4500-14. [PMID: 23766025 DOI: 10.4238/2013.may.6.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
Insulin-like growth factors (IGFs) are regulators that modulate the proliferation and differentiation of muscle tissues. We quantified the messenger RNA (mRNA) expression of IGF-I, IGF-II, and type I and II IGF receptors (IGF-IR and IGF-IIR) in muscle tissues including the breast, leg, and myocardium during an early postnatal development growth stage (post-hatching weeks 1-8) in ducks. The results showed a significant age-related change in mRNA in these muscle tissues. In breast muscle, the developmental expression of IGF-I and IGF-II was highest during week 1 but decreased quickly and maintained a relatively lower level. Leg muscle had the highest mRNA expression of IGF-I and IGF-II genes at week 3. In myocardial tissues, the expression level of IGF-IR and IGF-IIR genes exhibited a "rise-decline" developmental trend. The expression patterns of IGF-I/IGF-IR and IGF-II/IGF-IIR were different between weeks 4 and 6. The same expression pattern was observed for IGF-I and IGF-IR; however, it was different from that observed for IGF-II and IGF-IIR. Our results showed a negative correlation between IGF-II mRNA expression and leg muscle weight at week 4 (P < 0.05). A negative correlation was also found between IGF-II mRNA expression and breast muscle weight (P < 0.01), and a positive correlation was found between IGF-IR expression and breast muscle weight. At week 6, a positive correlation was found between IGF-IR expression and breast muscle weight. However, at week 8, a negative correlation was found between IGF-IR expression and breast muscle weight. The results showed that the expression of IGF mRNA in duck tissues exhibits a specific developmental trend and an age-related pattern, suggesting that the regulation mechanism of these 4 genes in proliferation and differentiation of muscle tissues differed.
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Affiliation(s)
- C-L Song
- Institute of Animal Breeding and Genetics, Sichuan Agricultural University, Ya'an, Sichuan Province, China
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Kou J, Wang W, Liu H, Pan Z, He T, Hu J, Li L, Wang J. Comparison and characteristics of the formation of different adipose tissues in ducks during early growth. Poult Sci 2012; 91:2588-97. [DOI: 10.3382/ps.2012-02273] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Bower SM, Kou J, Saylor JR. A method for the temperature calibration of an infrared camera using water as a radiative source. Rev Sci Instrum 2009; 80:095107. [PMID: 19791964 DOI: 10.1063/1.3213075] [Citation(s) in RCA: 4] [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: 05/28/2023]
Abstract
Presented here is an effective low-cost method for the temperature calibration of infrared cameras, for applications in the 0-100 degrees C range. The calibration of image gray level intensity to temperature is achieved by imaging an upwelling flow of water, the temperature of which is measured with a thermistor probe. The upwelling flow is created by a diffuser located below the water surface of a constant temperature water bath. The thermistor probe is kept immediately below the surface, and the distance from the diffuser outlet to the surface is adjusted so that the deformation of the water surface on account of the flow is small, yet the difference between the surface temperature seen by the camera and the bulk temperature measured by the thermistor is also small. The benefit of this method compared to typical calibration procedures is that, without sacrificing the quality of the calibration, relatively expensive commercial blackbodies are replaced by water as the radiative source (epsilon approximately 0.98 for the wavelengths considered here). A heat transfer analysis is provided, which improves the accuracy of the calibration method and also provides the user with guidance to further increases in accuracy of the method.
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Affiliation(s)
- S M Bower
- Department of Mechanical Engineering, Clemson University, Clemson, South Carolina 29634-0921, USA
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Kou J, Saylor JR. A method for removing surfactants from an air/water interface. Rev Sci Instrum 2008; 79:123907. [PMID: 19123579 DOI: 10.1063/1.3053316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The study of heat, mass, and momentum transport across an air/water interface is an aspect of fluid mechanics where the presence of surfactant monolayers can play a significant role. Experimental studies of air/water transport typically require a method for cleaning the air/water interface so that it is free from any contaminating surfactant monolayer. This may be for the sake of running an experiment under clean surface conditions, or to clean the surface prior to deposition of a known surfactant. Herein a method is described for maintaining a clean air/water interface during conditions of finite air flow over the water surface. The unique aspect of this method is its ability to maintain clean surfaces while experiments are conducted.
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Affiliation(s)
- J Kou
- Department of Mechanical Engineering, Clemson University, Clemson, South Carolina 29634-0921, USA
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Abstract
Bioassay-guided investigation was performed to identify the active constituents from a methanol extract of Polygala japonica, a folk medicinal plant widely used in China to treat inflammatory diseases. The n-BuOH and EtOAc fractions of the P. japonica methanol extract, which show significant anti-inflammatory activity in in vivo test, were further subjected to column chromatography to afford six triterpene glycosides, marked here as saponins 1-6. All compounds were evaluated for their anti-inflammatory activity in the carageenan-induced mouse paw edema test, and saponins 1, 4 and 5 showed significantly anti-inflammatory effects on both phases of carageenan-induced acute paw edema in mice. Saponin 5 was also found to significantly inhibit the production of inflammatory mediators - nitric oxide (NO) in LPS-stimulated RAW264.7 macrophages, with no obvious effects on macrophage viability.
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Affiliation(s)
- H Wang
- Department of Traditional Chinese Prescription, China Pharmaceutical University, Box C-09, No. 1 Shennong Road, Nanjing 210038, PR China
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17
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Abstract
One requirement for licensure of a vaccine in the United States is demonstration by the manufacturer of consistently produced lots of vaccine. Demonstration of consistency of manufacturing can be viewed as a multigroup equivalence problem. The standard statistical procedures for evaluating equivalence assume normally distributed data and define equivalence margins with respect to group means. As an alternative approach, we define a measure of the similarity among group distributions and their nonparametric estimators. Through computer simulations we explore the statistical properties of an equivalence test based on this estimator and compare them to the standard methods. Preliminary work suggests that a test of similarity can be useful in demonstrating equivalence when distributions are not normal or when there are differences in scale or shape. It appears to detect departures from equivalence that are not reflected by differences among group means.
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Affiliation(s)
- P A Lachenbruch
- U.S. FDA/Center for Biologics Evaluation and Research, Rockville, Maryland 20852, USA.
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18
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Abstract
Photoion yields from gaseous fullerenes, C(60) and C(70), for production of singly and doubly charged ions are measured by mass spectrometry combined with tunable synchrotron radiation at hnu=25-150 eV. Since the signal of triply or highly charged ions is very weak, the total photoionization yield curve can be estimated from the sum of the yields of the singly and doubly charged ions. A distinct feature appears in the resultant curve of C(60) which is absent in the calculated total photoabsorption cross section previously reported. This difference is attributed to C(60) (2+) ions chiefly produced by spectator Auger ionization of the shape resonance states followed by tunneling of the trapped electron or by cascade Auger ionization. Ratios between the yields of doubly and singly charged ions for C(60) and C(70) are larger than unity at hnu>50 eV. These ratios are quite different from those reported in the experiments using electron impact ionization.
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Affiliation(s)
- J Kou
- Department of Vacuum UV Photo-Science, The Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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19
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Kou J, Mori T, Ono M, Haruyama Y, Kubozono Y, Mitsuke K. Molecular- and atomic-like photoionization of C60 in the extreme ultraviolet. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00613-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Abstract
STUDY DESIGN A case-control retrospective analysis comparing patients who developed a postoperative spinal epidural hematoma with patients who did not develop this complication. OBJECTIVES To identify risk factors for the development of an epidural hematoma following spinal surgery. SUMMARY OF BACKGROUND DATA Neurologic deterioration following spinal surgery is a rare but devastating complication. Epidural hematomas should be suspected in the patient who demonstrates a new postoperative neurologic deficit. The risk factors that predispose a patient to a postoperative spinal epidural hematoma have not been identified. METHODS Patients who underwent spinal surgery at a single institution over a 10-year period were retrospectively reviewed. Twelve patients who demonstrated neurologic deterioration after surgery and required surgical decompression because of an epidural hematoma were identified. All cases involved lumber laminectomies. A total of 404 consecutive patients that underwent lumbar decompression and did not develop an epidural hematoma formed the control group. Factors postulated to increase the risk of postoperative spinal epidural hematoma were compared between the two groups using logistic regression. RESULTS Multilevel procedures (P = 0.037) and the presence of a preoperative coagulopathy (P < 0.001) were significant risk factors. Age, body mass index, perioperative durotomies, and postoperative drains were not statistically significant risk factors. CONCLUSIONS Patients who require multilevel lumbar procedures and/or have a preoperative coagulopathy are at a significantly higher risk for developing a postoperative epidural hematoma.
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Affiliation(s)
- J Kou
- Department of Orthopaedic Surgery, William Beaumont Hospital, Royal Oak, Michigan, USA
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21
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Wang P, Wang F, Sun Y, Wang J, Kou J, Huang Y, Kang X, Wan G, Liang Y, Wang Q. Study on the transmission threshold value of bancroftian filariasis. Chin Med J (Engl) 1998; 111:261-4. [PMID: 10374430] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
OBJECTIVE To elucidate the transmission dynamic and epidemic trend of bancroftian filariasis occurred under the condition with no control measure taken 5 years after elimination of filariasis. METHODS A 10-year longitudinal observation (from 1984 to 1994) was made in Huayuan Village in Shengli Township of Tancheng County, which used to be a high bancroftian filariasis-endemic area in southern part of Shandong Province. RESULTS The microfilarial rate decreased from 0.56% before the study to 0.12% after the study and 8 out of the 9 previous microfilaria-positive cases became negative gradually. During the study period, 6 new microfilaremia cases were detected, 5 of which became negative naturally within 3 to 4 years. Eighty-eight point eight nine per cent of the detected patients with microfilaremia converted into IgG4-negative after 10 years. The natural infective rate of vectors decreased year by year and became zero by the tenth year of the study, the annual transmission potency decreased also from 3.47 to zero by the tenth year. CONCLUSIONS It showed that under the local natural environment the biting rate representing the vector density which was obtained by capture method was from 24.1 to 52.5 person/night among the residents who did not use mosquito nets, and 13.5 to 21 person/night among the residents who used mosquito nets. The microfilarial rate of 0.56% in population with the average microfilarial density of 6.6 to 20.7 capita/60 microliters ear blood of residual microfilaria-positive patients might be considered as the terminal threshold of transmission.
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Affiliation(s)
- P Wang
- Shandong Institute of Parasitic Diseases, Jining, China
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22
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Kou J, Yu Z, Tian J, Ma S, Yan Y. [Effects of yizhi pills on memory, superoxide dismutase and malondialdehyde of brain and immunity in mice]. Zhongguo Zhong Yao Za Zhi 1997; 22:493-6 inside back cover. [PMID: 11038919] [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: 02/18/2023]
Abstract
Passive avoidance tests have shown that Yizhi Pills (YZ) markedly improve the memory of normal mice at a dose of 100 mg/kg after oral administration for fifteen days, and significantly reverse the scopolamine, NaNO2 and EtOH-induced disruptions of memory retention in mice at doses of 100, 200, 500 mg/kg after oral administration for five days. In aged mice induced by D-galactose, YZ also significantly improve the impaired memory, increase the activity of SOD and decrease the content of MDA in brain. All these effects were observed at doses of 200, 500 mg/kg after oral administration for forty-one days. YZ significantly promote blood carbon particle clearance, enhance hemolysin antibody in immunodepressed mice induced by cyclophosphamide, and increase earswelling in immunodepressed mice induced by prednisolonum.
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Affiliation(s)
- J Kou
- Institute of Chinese Materia Medica, China Pharmaceutical University, Nanjing
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23
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Yu Z, Zhang G, Dai Y, Kou J, Dou C, Lu R. [Pharmacological study on the compatibility of cortex Cinnamomi with Halloysitum Rubrum]. Zhongguo Zhong Yao Za Zhi 1997; 22:309-12 inside back cover. [PMID: 11038972] [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: 02/18/2023]
Abstract
The decoction of Cortex Cinnamomi (CC, 1 g/kg p.o.) and Halloysitum Rubrum (HR, 3 g/kg p.o.) or the combination of the two drugs (4 g/kg p.o., CC 1 g/kg, HR 3 g/kg) could antagonize the diarrhea caused by p.o. water ex tract of Radix et Rhizoma Rhei in mice; and inhibit the platelet aggregation induced by ADP in vitro. Meanwhile, the effect of the combination of the two drugs was not different from that of each single one. In addition, CC was able to inhibit the spontaneous movement of intestine in situ and showed an analgesic effect (hot-plate method) in mice; HR was ineffective in these aspects and did not reduce the effect of CC. CC(20 g/kg p.o., i.p. or i.v.) exhibited very strong toxicity in mice, while HR(60 g/kg p.o., i.p. or i.v.) was nontoxic. When the two drugs were used together, the toxicity was markedly reduced.
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Affiliation(s)
- Z Yu
- China Pharmaceutical University, Nanjing
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24
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Abstract
OBJECTIVES The purpose of this study was to evaluate Children's Village, a life safety education facility for children. SETTING The study took place in Washington County, Maryland, a rural county. METHODS Eight elementary schools with 20 second grade classrooms (410 students aged 7 and 8) were selected to participate. Using a quasiexperimental design, tests were administered to two cohorts of children before (pretest) and after (post-test) they attended the Children's Village during 1993-4. Parent and teacher surveys were also completed after the program. RESULTS Among children who attended in December 1993-January 1994, there was a significant improvement in average test scores between the pretest (58% correct) and post-test (78%). Among children who attended in April 1994, there also was a significant improvement in test scores between pretest (74%) and post-test (85%). Among parents, 70% reported that their child learned a great deal at Children's Village and 33% reported having made changes in their home as a result. The parent survey also revealed that 25% of children and 35% of adults did not always wear their seat belts, and 74% of children did not always wear bicycle helmets. Teachers' responses to the program were generally positive. CONCLUSIONS Children's Village brought together an extensive network of community leaders, parents, and teachers dedicated to safety education of children. The curriculum had a positive impact on children's knowledge and, to a lesser extent, on parents' safety practices. Program impact could be enhanced by more emphasis on automobile restraints and helmets (behaviors that parents reported were not consistently practiced) and by expanding the village services to parents as well as children. Others considering creating similar programs need to identify community leaders willing to commit the time, effort, and resources required to develop and sustain such programs.
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Affiliation(s)
- A C Gielen
- Johns Hopkins University School of Public Health, Center for Injury Research and Policy, Baltimore, USA
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25
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Wang F, Yu Z, Kou J, Li C, Wang J. Detection of plasmodium falciparum lactate dehydrogenase. A promising approach to quick diagnosis of malaria. Chin Med J (Engl) 1995; 108:875-7. [PMID: 8585985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- F Wang
- Shandong Institute of Parasitic Disease
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26
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Ganbo T, Hisamatsu K, Mizukoshi A, Inoue H, Kikushima K, Kou J, Kozuka Y, Murakami Y. Effect of ibudilast on ciliary activity of human paranasal sinus mucosa in vitro. Arzneimittelforschung 1995; 45:883-6. [PMID: 7575753] [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: 01/26/2023]
Abstract
The effect of ibudilast (CAS 50847-11-5, 3-isobutyryl-2-isopropylpyrazolo[1,5-a]pyridine, KC-404), an anti-asthmatic drug, on ciliary beat frequency (CBF) of human paranasal sinus mucosa was examined in vitro. Ciliary activation was observed after a 10-min exposure to 4.6 x 10(-6) mol/l ibudilast. Ibudilast dose-dependently increase CBF at the concentrations ranging from 4.6 x 10(-7) mol/l to 4.6 x 10(-5) mol/l. Propranolol inhibited ciliary activity induced by ibudilast; however, neither indometacin nor verapamil affected the activation of ibudilast on CBF. Platelet activating factor (PAF) and Leukotriene D4 (LTD4) are chemical mediators inducing mucosal dysfunction and damage. Ibudilast prevented ciliary inhibition induced by PAF and LTD4. These findings indicated that ibudilast activates CBF and inhibits the effect of PAF and LTD4 on ciliated cells, and consequently improves the pathogenesis of allergic disorders such as the inhibited mucociliary transport system and airway hyperresponsiveness.
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Affiliation(s)
- T Ganbo
- Department of Otorhinolaryngology, Yamanashi Medical University, Japan
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27
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Abstract
In determining intestinal wall permeabilities, several mass transport models may be applied to analyze the results from external perfusion experiments. The appropriateness of any given model depends on the applicability of the model assumptions to the experimental system. This report compares several mass transport models with respect to their assumptions and applicability to a particular experimental design. The models are shown to differ in their assumptions regarding convection and diffusion in the perfusing fluid. However, since the wall permeability is an unknown parameter in each model and is estimated from the data, all of the models fit the mass transfer results reasonably well, despite fundamentally different assumptions. However, the determined permeabilities differ. Residence time distribution analysis of the experimental system is more sensitive to the model assumptions. It is shown that, in a particular experimental system, laminar flow in a cylindrical tube is the most appropriate model. The model also has the advantage of implicitly accounting for the convection-diffusion problem in the perfusing fluid. Hence, the diffusion layer thickness is not estimated from the data. With the hydrodynamics defined, the relative permeabilities resulting from the application of the several models to the data can be interpreted. The wall permeability determined in the suggested manner provides an estimate of the limiting assistance under perfect mixing conditions.
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