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Wickham JD, Lu W, Jin T, Peng Z, Guo D, Millar JG, Hanks LM, Chen Y. Prionic Acid: An Effective Sex Attractant for an Important Pest of Sugarcane, Dorysthenes granulosus (Coleoptera: Cerambycidae: Prioninae). JOURNAL OF ECONOMIC ENTOMOLOGY 2016; 109:484-486. [PMID: 26362990 DOI: 10.1093/jee/tov266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 08/17/2015] [Indexed: 06/05/2023]
Abstract
Male Dorysthenes granulosus (Thomson, 1860) (Coleoptera: Cerambycidae: Prioninae) were caught in traps baited with racemic 3,5-dimethyldodecanoic acid (prionic acid) during field screening trials in China that tested known cerambycid pheromones. This species is an important pest of sugarcane (Saccharum officinarum L.). In follow-up dose-response trials, plastic sachets loaded with 1 or 0.1 mg of prionic acid were equally attractive to male beetles, whereas lower doses were no better than controls. Two commercial prionic acid lures also were attractive, suggesting that traps baited with prionic acid can be rapidly incorporated into integrated pest management programs targeting this major pest. It is likely that this compound is a major component of the female-produced sex pheromone of D. granulosus because this species is in the same subfamily as Prionus californicus Motschulsky, 1845, the species from which prionic acid was originally identified.
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Massink A, Holzheimer M, Hölscher A, Louvel J, Guo D, Spijksma G, Hankemeier T, IJzerman AP. Mass spectrometry-based ligand binding assays on adenosine A1 and A2A receptors. Purinergic Signal 2015; 11:581-94. [PMID: 26482925 PMCID: PMC4648803 DOI: 10.1007/s11302-015-9477-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 10/02/2015] [Indexed: 12/01/2022] Open
Abstract
Conventional methods to measure ligand-receptor binding parameters typically require radiolabeled ligands as probes. Despite the robustness of radioligand binding assays, they carry inherent disadvantages in terms of safety precautions, expensive synthesis, special lab requirements, and waste disposal. Mass spectrometry (MS) is a method that can selectively detect ligands without the need of a label. The sensitivity of MS equipment increases progressively, and currently, it is possible to detect low ligand quantities that are usually found in ligand binding assays. We developed a label-free MS ligand binding (MS binding) assay on the adenosine A1 and A2A receptors (A1AR and A2AAR), which are well-characterized members of the class A G protein-coupled receptor (GPCR) family. Radioligand binding assays for both receptors are well established, and ample data is available to compare and evaluate the performance of an MS binding assay. 1,3-Dipropyl-8-cyclopentyl-xanthine (DPCPX) and 4-(2-((7-amino-2-(furan-2-yl)-[1,2,4]triazolo[1,5-a]-[1,3,5]triazin-5-yl)amino)ethyl)phenol (ZM-241,385) are high-affinity ligands selective for the A1AR and A2AAR, respectively. To proof the feasibility of MS binding on the A1AR and A2AAR, we first developed an MS detection method for unlabeled DPCPX and ZM-241,385. To serve as internal standards, both compounds were also deuterium-labeled. Subsequently, we investigated whether the two unlabeled compounds could substitute for their radiolabeled counterparts as marker ligands in binding experiments, including saturation, displacement, dissociation, and competition association assays. Furthermore, we investigated the accuracy of these assays if the use of internal standards was excluded. The results demonstrate the feasibility of the MS binding assay, even in the absence of a deuterium-labeled internal standard, and provide great promise for the further development of label-free assays based on MS for other GPCRs.
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Zhang CC, Mou L, Wang X, Guo D. Does live music benefits patients with brain and spinal injury? EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:3246-3250. [PMID: 26400530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE The purpose of this study is to examine the feasibility and prospective success associated with implementing and evaluating a six-week live music intervention on an inpatient neurorehabilitation ward. PATIENTS AND METHODS In total 26 patients were included in this study. Out of which, 15 were patients and 11 were staff members. Staff participants completed wellbeing measures at before and after music. Patients completed an assortment of validated measures at five consecutive time points from baseline to follow-up. Staff participants experienced a minor decrease in wellbeing over time. RESULTS The majority of the data collected from patients illustrated positive trends, with improvements in wellbeing, pain, cognition functioning, independent functioning, and mobility. The feasibility indicates that with modifications that this project is a viable venture. CONCLUSIONS We found that live music appears to be promising new addition to neurorehabilitation.
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Wang J, Yu Y, Li LL, Guo D, Tao YL, Chu D. Carposina sasakii (Lepidoptera: Carposinidae) in its Native Range Consists of Two Sympatric Cryptic Lineages as Revealed by Mitochondrial COI Gene Sequences. JOURNAL OF INSECT SCIENCE (ONLINE) 2015; 15:iev063. [PMID: 26136498 PMCID: PMC4535581 DOI: 10.1093/jisesa/iev063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 05/22/2015] [Indexed: 06/04/2023]
Abstract
The genetic differentiation and genetic structure of the peach fruit moth, Carposina sasakii Matsumura (Lepidoptera: Carposinidae), was investigated in China, where the moth is native. The mitochondrial cytochrome c oxidase I (COI) gene of 180 individuals from 16 collections were sequenced and analyzed. The results showed that two sympatric and cryptic mtDNA lineages existed within C. sasakii in China. The genetic differentiation has significant correlation with the geographical distance, but has no evidence for host plant associations. Our results of haplotype distribution suggest that the C. sasakii individuals can naturally move between areas, while the movement of individuals between long-distance locations may be associated with human activities such as the transport of fruit. Finally, an mitochondrial COI gene PCR-RFLP method was developed to differentiate the two cryptic mtDNA lineages within C. sasakii, which provides rapid and reliable tool for the future research of the two lineages.
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Yang X, Guo D, Jiang J. [High central pulse pressure level is associated with cardiovascular disease in patients receiving maintenance peritoneal dialysis]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2015; 35:716-719. [PMID: 26018269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To evaluate the association between central pulse pressure level and cardiovascular diseases (CVD) in patients receiving maintenance peritoneal dialysis. METHODS This cross-sectional study was conducted in 234 patients on maintenance peritoneal dialysis. Central pulse pressure levels were measured using a SphygmoCor analyzer, and cardiovascular diseases were defined as diagnosed ischemic heart disease, heart failure, stroke or peripheral vascular disease. RESULTS The central pulse pressure levels of patients with CVD were significantly higher than those without CVD (51.7 ± 22.5 vs 43.7 ± 17.8 mmHg, P=0.004), while the brachial pulse pressure levels were comparable between the two patient groups. After adjusting for brachial pulse pressure and other relevant risk factors, central pulse pressure level was found to independently associate with CVD (adjusted OR=1.33, 95% CI 1.01-1.73, P=0.04 ). CONCLUSION High central pulse pressure level may serve as a risk factor for CVD in patients on maintenance peritoneal dialysis.
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Hu ZC, Chen D, Guo D, Liang YY, Zhang J, Zhu JY, Tang B. Randomized clinical trial of autologous skin cell suspension combined with skin grafting for chronic wounds. Br J Surg 2015; 102:e117-23. [PMID: 25627123 DOI: 10.1002/bjs.9688] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 09/03/2014] [Accepted: 09/29/2014] [Indexed: 01/16/2023]
Abstract
BACKGROUND Treatment of chronic wounds using traditional surgical procedures is challenging because of the low graft take rates. This study investigated the combination approach of split-thickness autografts with harvested skin cell suspension for chronic wound treatment. METHODS This randomized clinical trial enrolled patients with chronic wounds between March 2012 and December 2013. Patients who were assigned randomly to the active treatment received a split-thickness autograft combined with harvested skin cell suspension. Control patients received the split-thickness autograft alone. The primary outcome was the rate of complete wound closure by postoperative day 28. Analysis was by intention to treat. Patients who achieved wound closure were followed up for a minimum of 6 months to evaluate the quality of healing. RESULTS A total of 88 patients were included, 44 in each group. More patients achieved complete wound closure in the skin cell group than in the control group (41 versus 34 patients; P = 0·035). Complete wound closure was observed at a median of 14 (95 per cent c.i. 12·0 to 16·0) days in the skin cell group and 20 (15·7 to 24·3) days in the control group (P = 0·001). The skin cell group had significantly fewer complications (4 versus 11 patients; P = 0·047). The autografted sites displayed better physical attributes and a reduced tendency for wound recurrence in the skin cell group. CONCLUSION Complementary split-thickness autologous skin grafting with autologous skin cells harvested using ReCell® (Avita Medical, Cambridge, UK) technology improved the healing rate of chronic wounds. REGISTRATION NUMBER UMIN000011966 (http://www.umin.ac.jp/ctr).
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Liu L, Guo D, Liang Q, Ding S, Wu B, Zhang L, Li Q. The efficacy of sublingual immunotherapy withDermatophagoides farinaevaccine in a murine atopic dermatitis model. Clin Exp Allergy 2015; 45:815-22. [DOI: 10.1111/cea.12417] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 07/29/2014] [Accepted: 09/17/2014] [Indexed: 11/28/2022]
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He Q, Zhang Y, Zhou S, She S, Chen G, Chen K, Yan Z, Guo D. Estimating the aroma glycosides in flue-cured tobacco by solid-phase extraction and gas chromatography-mass spectrometry: changes in the bound aroma profile during leaf maturity. FLAVOUR FRAG J 2015. [DOI: 10.1002/ffj.3235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dong WS, Zeng F, Lu SH, Li XJ, Chang CT, Liu A, Pan F, Guo D. Effect of heavy-ion on frequency selectivity of semiconducting polymer/electrolyte heterojunction. RSC Adv 2015. [DOI: 10.1039/c5ra19938g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Long-term bidirectional frequency selectivity has been achieved in MEH-PPV/PEO–Nd3+cells, which suggests spike-rate-dependent plasticity learning protocol. It depends on pulse shape due to variation of ionic type.
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Guo D, Li HL, Tang X, Peng SQ. Cassava (Manihot esculenta Krantz) genome harbors KNOX genes differentially expressed during storage root development. GENETICS AND MOLECULAR RESEARCH 2014; 13:10714-26. [PMID: 25526192 DOI: 10.4238/2014.december.18.13] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In plants, homeodomain proteins play a critical role in regulating various aspects of plant growth and development. KNOX proteins are members of the homeodomain protein family. The KNOX transcription factors have been reported from Arabidopsis, rice, and other higher plants. The recent publication of the draft genome sequence of cassava (Manihot esculenta Krantz) has allowed a genome-wide search for M. esculenta KNOX (MeKNOX) transcription factors and the comparison of these positively identified proteins with their homologs in model plants. In the present study, we identified 12 MeKNOX genes in the cassava genome and grouped them into two distinct subfamilies based on their domain composition and phylogenetic analysis. Furthermore, semi-quantitative reverse transcription polymerase chain reaction analysis was performed to elucidate the expression profiles of these genes in different tissues and during various stages of root development. The analysis of MeKNOX expression profiles of indicated that 12 MeKNOX genes display differential expressions either in their transcript abundance or expression patterns.
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Lv P, Lin J, Guo D, Liu H, Tang X, Fu C, Hu J. Detection of carotid artery stenosis: a comparison between 2 unenhanced MRAs and dual-source CTA. AJNR Am J Neuroradiol 2014; 35:2360-5. [PMID: 25104291 DOI: 10.3174/ajnr.a4073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND PURPOSE Dual-source CTA and black-blood MRA are recently developed techniques for evaluating carotid stenosis. The purpose of this study was to compare dual-source CTA with black-blood MRA and conventional TOF MRA in both detecting carotid stenosis by using DSA as a reference standard and demonstrating plaque morphology. MATERIALS AND METHODS Thirty patients with suspected carotid artery stenosis underwent unenhanced MRA by using black-blood and TOF MRA and dual-source CTA. Source images from unenhanced MRAs and dual-source CTA were reconstructed with MIP or curved planar reconstruction. The degree of carotid artery stenosis was measured, and plaque surface morphology at the stenosis was analyzed and compared among different techniques. RESULTS Good correlation was observed for measuring the degree of carotid stenosis among dual-source CTA, black-blood MRA, TOF MRA, and DSA. Sensitivity and specificity for detecting severe stenosis were 100% and 97% with dual-source CTA, 100% and 95% with black-blood MRA, and 79% and 95% with TOF MRA. None of the 3 technologies resulted in stenosis of <50% being overestimated. Plaque surface irregularity or ulceration was more frequently detected with dual-source CTA and black-blood MRA than with TOF MRA and DSA. CONCLUSIONS This preliminary study shows that black-blood MRA is a promising technique, comparable with dual-source CTA and DSA, but better than TOF MRA, in the evaluation of carotid stenosis. Unlike dual-source CTA, black-blood MRA requires no intravenous contrast or radiation.
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Steen A, Sparre-Ulrich AH, Thiele S, Guo D, Frimurer TM, Rosenkilde MM. Gating function of isoleucine-116 in TM-3 (position III:16/3.40) for the activity state of the CC-chemokine receptor 5 (CCR5). Br J Pharmacol 2014; 171:1566-79. [PMID: 24328926 DOI: 10.1111/bph.12553] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/25/2013] [Accepted: 12/02/2013] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND PURPOSE A conserved amino acid within a protein family indicates a significance of the residue. In the centre of transmembrane helix (TM)-5, position V:13/5.47, an aromatic amino acid is conserved among class A 7TM receptors. However, in 37% of chemokine receptors - a subgroup of 7TM receptors - it is a leucine indicating an altered function. Here, we describe the significance of this position and its possible interaction with TM-3 for CCR5 activity. EXPERIMENTAL APPROACH The effects of [L203F]-CCR5 in TM-5 (position V:13/5.47), [I116A]-CCR5 in TM-3 (III:16/3.40) and [L203F;G286F]-CCR5 (V:13/5.47;VII:09/7.42) were determined in G-protein- and β-arrestin-coupled signalling. Computational modelling monitored changes in amino acid conformation. KEY RESULTS [L203F]-CCR5 increased the basal level of G-protein coupling (20-70% of Emax ) and β-arrestin recruitment (50% of Emax ) with a threefold increase in agonist potency. In silico, [I116A]-CCR5 switched χ1-angle in [L203F]-CCR5. Furthermore, [I116A]-CCR5 was constitutively active to a similar degree as [L203F]-CCR5. Tyr(244) in TM-6 (VI:09/6.44) moved towards TM-5 in silico, consistent with its previously shown function for CCR5 activation. On [L203F;G286F]-CCR5 the antagonist aplaviroc was converted to a superagonist. CONCLUSIONS AND IMPLICATIONS The results imply that an aromatic amino acid in the centre of TM-5 controls the level of receptor activity. Furthermore, Ile(116) acts as a gate for the movement of Tyr(244) towards TM-5 in the active state, a mechanism proposed previously for the β2 -adrenoceptor. The results provide an understanding of chemokine receptor function and thereby information for the development of biased and non-biased antagonists and inverse agonists.
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Auffinger B, Tobias A, Han Y, Lee G, Guo D, Dey M, Lesniak M, Ahmed A. SC-02 * CONVERSION OF DIFFERENTIATED CANCER CELLS INTO CANCER STEM-LIKE CELLS IN A GLIOBLASTOMA MODEL AFTER PRIMARY CHEMOTHERAPY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou275.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Guo D, Hu J. Spinal presynaptic inhibition in pain control. Neuroscience 2014; 283:95-106. [PMID: 25255936 DOI: 10.1016/j.neuroscience.2014.09.032] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 09/10/2014] [Accepted: 09/14/2014] [Indexed: 12/22/2022]
Abstract
The gate control theory proposed that the nociceptive sensory information transmitted to the brain relies on an interplay between the inputs from nociceptive and non-nociceptive primary afferent fibers. Both inputs are normally under strong inhibitory control in the spinal cord. Under healthy conditions, presynaptic inhibition activated by non-nociceptive fibers modulates the afferent input from nociceptive fibers onto spinal cord neurons, while postsynaptic inhibition controls the excitability of dorsal horn neurons, and silences the non-nociceptive information flow to nociceptive-specific (NS) projection neurons. However, under pathological conditions, this spinal inhibition may be altered and lead to chronic pain. This review summarizes our knowledge of presynaptic inhibition in pain control, with particular focus on how its alteration after nerve or tissue injury contributes to neuropathic or inflammatory pain syndromes, respectively.
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Hu ZC, Tang B, Guo D, Zhang J, Liang YY, Ma D, Zhu JY. Expression of insulin-like growth factor-1 receptor in keloid and hypertrophic scar. Clin Exp Dermatol 2014; 39:822-8. [PMID: 25154292 PMCID: PMC4232319 DOI: 10.1111/ced.12407] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Keloid and hypertrophic scar (HS) are two pathological forms of excessive dermal fibrosis, which are due to aberrant wound-healing responses. Accumulating evidence suggests that aberrant activity of growth factors and increased numbers of growth factor receptors play an important role in the formation of pathological scar. AIM We examined the expression level of insulin-like growth factor-1 receptor (IGF-IR) in keloid, HS and normal skin. METHODS IGF-IR expression was analyzed by immunohistochemistry, real-time PCR and western blotting on tissues and fibroblasts from 30 patients, comprising 10 patients with keloid and 20 with HS (10 with immature and 10 with mature HS), and from 10 age-matched and sex-matched healthy controls. RESULTS Immunoreactivity to IGF-IR was found in dermal fibroblasts of keloid (90%), immature HS, (80%) and mature HS (30%), but not in normal skin. There was no statistically significant difference in immunoreactivity scores between keloid and immature HS, but there was a significant difference (P < 0.01) between mature and immature HS. Real-time PCR and western blot analysis confirmed that there was high expression of IGF-IR in keloid and immature HS fibroblasts, but not in mature HS or normal skin fibroblasts. IGF-IR was expressed in the overlying epidermis, and there was no significant difference between the groups. CONCLUSIONS IGF-IR may be involved in the pathogenesis of keloid and HS. Given that IGF-IR are predominantly expressed on dermal fibroblasts, targeting of IGF-IR in fibroblasts may be of benefit to prevent scarring.
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Guo D, Geng F, Aggarwal R, Liu J, Yoo JY, Guo Q, Guo JY, Hurwitz B, Ru P, Cheng C, Joshi K, Ichiro N, Kaur B, Chakravarti A. INTERPLAY OF LIPID DROPLETS AND AUTOPHAGY REGULATES GLIOBLASTOMA SURVIVAL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.31] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang QL, Li JP, Chen Y, Chang Q, Li YM, Yao JY, Jiang HZ, Zhao ZH, Guo D. Growth and viability of Liaoning Cashmere goat hair follicles during the annual hair follicle cycle. GENETICS AND MOLECULAR RESEARCH 2014; 13:4433-43. [PMID: 25036348 DOI: 10.4238/2014.june.16.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Here, we studied hair follicle development of Liaoning Cashmere goats. Every month for 1 year, skin samples were collected from five 1.5-year-old female goats, and made into paraffin sections. A number of parameters were measured of primary and secondary hair follicles via microscopic observation including follicle depth, hair bulb width, dermis and epidermis thickness, changes in follicle activity, and histology. The results showed the presence of three phases in the annual hair cycle: anagen, catagen, and telogen. Primary and secondary hair follicle depth varied across the months; however, no significant difference was obtained between adjacent months (P>0.05). Primary hair follicles had a bigger hair bulb width compared to secondary hair follicles; however, this difference declined during hair follicle developed in anagen. As hair follicle growth slowed, the hair bulb broadened, and hair root depth became shallower. During the entire hair cycle, hair follicle depth and dermis thickness were positively correlated; however, this relationship was not significant (P>0.05) for primary and secondary hair follicle density and the ratio of secondary hair follicle density and primary hair follicle density (S/P ratio). In addition, new and old primary hair follicles coexisted with secondary hair follicles. Finally, secondary hair follicles had a higher activity rate compared to primary hair follicle in adult Liaoning Cashmere goats in certain months.
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Strobel K, Simpson P, Donohoue P, Firat S, Jogal S, Lai JS, Beaumont J, Goldman S, Huang C, Barrera M, Rokeach A, Hancock K, Cataudella D, Schulte F, Chung J, Bartels U, Janzen L, Sung L, Strother D, Hukin J, Downie A, Zelcer S, Atenafu E, Schiavello E, Biassoni V, Meazza C, Podda M, Massimino M, Wells EM, Ullrich NJ, Seidel K, Leisenring W, Sklar C, Armstrong GT, Diller L, King A, krull K, Neglia JP, Stovall M, Whelan K, Robison LL, Packer RJ, Remes T, Harila-Saari A, Suo-Palosaari M, Lahteenmaki P, Arikoski P, Riikonen P, Rantala H, Ojaniemi M, Bull K, Kennedy C, Bailey S, Ellison D, Clifford S, Dembowska-Baginska B, Brozyna A, Drogosiewicz M, Perek-Polnik M, Swieszkowska E, Filipek I, Tarasinska M, Korzeniewska J, Perek D, Salgado D, Nunes S, Pereira P, Vinhais S, Salih S, Elsarrag S, Prange E, Contreas K, Possin P, Frierdich S, Eickhoff J, Puccetti D, Huang C, Ladas E, Buck C, Arbit N, Gudrunardottir T, Lannering B, Remke M, Taylor MD, Wells EM, Keating RF, Packer RJ, Stapleton S, Flanary J, Hamblin F, Amankwah E, Ghazarian S, Jagt CT, van de Wetering M, Schouten-van Meeteren AYN, Lai JS, Nowinski C, Hartsell W, Chang JHC, Cella D, Goldman S, Krishna U, Nagrulkar A, Takle M, Kannan S, Gupta T, Jalali R, Northman L, Morris M, Ross S, Guo D, Chordas C, Liptak C, Delaney B, Ullrich N, Manley P, Avula S, Pizer B, Ong CC, Harave S, Mallucci C, Kumar R, Margol A, Finlay J, Dhall G, Robison N, Krieger M, Kiehna E, Coates T, Nelson M, Grimm J, Evans A, Nelson MB, Britt B, Margol A, Robison N, Dhall G, Finlay J, Cooksey R, Wu S, Gode A, Klesse L, Oden J, Vega G, Gargan L, Bowers D, Madden JR, Prince E, Zeitler P, Foreman NK, Liu AK. QUALITY OF LIFE/AFTERCARE. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Chen W, Vorobyev G, Guo D, Herfurth F, Hillenbrand PM, Spillmann U, Trotsenko S, Gumberidze A, Stöhlker T. Metal vapor target for precise studies of ion-atom collisions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:053513. [PMID: 24880375 DOI: 10.1063/1.4878626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Although different ion-atom collisions have been studied in various contexts, precise values of cross-sections for many atomic processes were seldom obtained. One of the main uncertainties originates from the value of target densities. In this paper, we describe a unique method to measure a target density precisely with a combination of physical vapor deposition and inductively coupled plasma optical emission spectrometry. This method is preliminarily applied to a charge transfer cross-section measurement in collisions between highly charged ions and magnesium vapor. The final relative uncertainty of the target density is less than 2.5%. This enables the precise studies of atomic processes in ion-atom collisions, even though in the trial test the deduction of precise capture cross-sections was limited by other systematic errors.
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Auffinger B, Tobias AL, Han Y, Lee G, Guo D, Dey M, Lesniak MS, Ahmed AU. Conversion of differentiated cancer cells into cancer stem-like cells in a glioblastoma model after primary chemotherapy. Cell Death Differ 2014; 21:1119-31. [PMID: 24608791 DOI: 10.1038/cdd.2014.31] [Citation(s) in RCA: 244] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 02/03/2014] [Accepted: 02/03/2014] [Indexed: 12/28/2022] Open
Abstract
Glioblastoma multiforme patients have a poor prognosis due to therapeutic resistance and tumor relapse. It has been suggested that gliomas are driven by a rare subset of tumor cells known as glioma stem cells (GSCs). This hypothesis states that only a few GSCs are able to divide, differentiate, and initiate a new tumor. It has also been shown that this subpopulation is more resistant to conventional therapies than its differentiated counterpart. In order to understand glioma recurrence post therapy, we investigated the behavior of GSCs after primary chemotherapy. We first show that exposure of patient-derived as well as established glioma cell lines to therapeutic doses of temozolomide (TMZ), the most commonly used antiglioma chemotherapy, consistently increases the GSC pool over time both in vitro and in vivo. Secondly, lineage-tracing analysis of the expanded GSC pool suggests that such amplification is a result of a phenotypic shift in the non-GSC population to a GSC-like state in the presence of TMZ. The newly converted GSC population expresses markers associated with pluripotency and stemness, such as CD133, SOX2, Oct4, and Nestin. Furthermore, we show that intracranial implantation of the newly converted GSCs in nude mice results in a more efficient grafting and invasive phenotype. Taken together, these findings provide the first evidence that glioma cells exposed to chemotherapeutic agents are able to interconvert between non-GSCs and GSCs, thereby replenishing the original tumor population, leading to a more infiltrative phenotype and enhanced chemoresistance. This may represent a potential mechanism for therapeutic relapse.
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Zeng F, Li S, Yang J, Pan F, Guo D. Learning processes modulated by the interface effects in a Ti/conducting polymer/Ti resistive switching cell. RSC Adv 2014. [DOI: 10.1039/c3ra46679e] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Hui Q, Ma J, Song J, Liu Z, Ren H, Jiang W, Wang Y, Xu Y, Guo D, Zhang X, Lu S. In vitro and in vivo studies of antitumor effects of the recombinant immunotoxin MSH-PE38KDEL on melanoma. Neoplasma 2014; 61:392-400. [PMID: 25027740 DOI: 10.4149/neo_2014_048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
MSH-PE38KDEL is a chimeric molecule composed of MSH, and fused to a truncated mutant form of Pseudomonas exotoxin (PE38KDEL). Our study aims to evaluate the specific cytotoxicity of recombinant immunotoxin MSH-PE38KDEL on melanoma cells A875 and B16 in vitro, as well as its inhibition of metastatic melanoma in vivo. MSH-PE38KDEL was expressed in Escherichia coli, and greater than 90% purity was obtained. The purified MSH-PE38KDEL was found to be selectively cytotoxic to MSH receptor-positive melanoma cells in vitro. The specific cytotoxicity of recombinant MSH-PE38KDEL to A875 and B16 was over 85% by cell viability assay; however, MSH-PE38KDEL had no cytotoxicity to the human 2BS cells. The anti-tumor activity of MSH-PE38KDEL was evaluated in mice with induced melanoma through intra-tumor or intravenous administration. The results showed that 90% melanoma growths were inhibited, and 40% of the tumors were disappeared completely. Histopathology results showed MSH-PE38KDEL can effectively inhibit intrahepatic metastasis. In conclusion, MSH-PE38KDEL had cytotoxic effects on MSH receptor-positive melanoma cells, and causes significant tumor growth inhibition. These results support a possible new approach for the treatment of melanoma.
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Ren J, Xu S, Guo D, Zhang J, Liu S. Increased expression of α5β1-integrin is a prognostic marker for patients with gastric cancer. Clin Transl Oncol 2013; 16:668-74. [PMID: 24248895 DOI: 10.1007/s12094-013-1133-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 11/01/2013] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The study was to evaluate the association of expression level of α5β1-integrin with clinicopathologic features and prognosis in gastric cancer (GC). METHODS The expression of α5β1-integrin in normal gastric mucosa and GC tissue was detected with immunohistochemistry. The level of α5 and β1 mRNA in GC tissues and non-neoplastic tissues was evaluated in 48 paired cases by quantitative real-time polymerase chain reaction (qRT-PCR). Survival analysis by the Kaplan-Meier method was performed to assess prognostic significance. RESULTS The α5β1-integrin expression was detected in 68.3 % (127/186) GC samples, and there was a significant difference on their positive expression rate between GC tissue and normal gastric mucosa (P < 0.001). The positive expression rate of α5β1-integrin in patients with poor histologic differentiation (P = 0.001), lymph node metastasis (P < 0.001), and recurrence (P < 0.001) group was heightened. Using Kaplan-Meier analysis, a comparison of survival curves of low versus high expresser of α5β1-integrin revealed a highly significant difference in human GC tissue (P = 0.002), which suggested that overexpression of α5β1-integrin is associated with a worse prognosis. Multivariate analyses showed that α5β1-integrin expression was independent risk factor predicting overall survival [Hazard ratio (HR) 1.594, 95 % confidence interval (CI) 1.236-2.408, P = 0.006] and disease-free survival [HR 3.952, 95 % CI 1.676-9.861, P = 0.003] in GC. CONCLUSIONS The α5β1-integrin promotes angiogenesis and associates with lymph node metastasis, vascular invasion and poor prognosis of GC. The current study shows that α5β1-integrin may be an independent prognostic factor for GC patients.
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Fačevicová K, Hron K, Todorov V, Guo D, Templ M. Logratio approach to statistical analysis of 2×2 compositional tables. J Appl Stat 2013. [DOI: 10.1080/02664763.2013.856871] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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