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Wang XW, Li K, Guo S, Qiang HN, Liu L, Song P, Wei C, Yi XL, Jian Z, Li Q, Li CY, Gao TW. The association of functional polymorphisms in the aryl hydrocarbon receptor (AHR) gene with the risk of vitiligo in Han Chinese populations. Br J Dermatol 2012; 166:1081-7. [PMID: 22211302 DOI: 10.1111/j.1365-2133.2011.10798.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Vitiligo is an acquired depigmentation disorder resulting from selective destruction of melanocytes. The aryl hydrocarbon receptor (AHR) is vital to the regulation of melanogenesis and melanocyte proliferation and differentiation through modulating the expressions of melanogenesis-related genes. AHR mutations may negatively affect AHR proteins and its target genes. Therefore, we hypothesized that AHR polymorphisms might be involved in vitiligo by impacting the transcriptional activities of related genes as mentioned above. OBJECTIVES To evaluate the potential association between AHR polymorphisms and vitiligo susceptibility. METHODS We performed a hospital-based, case-control study of 1000 patients with vitiligo and 1000 vitiligo-free but age- and gender-matched controls. Two single nucleotide polymorphisms of the AHR gene (rs10249788 and rs2066853) were selected and genotyped using a polymerase chain reaction-restriction fragment length polymorphism method. RESULTS A statistically significantly decreased risk of vitiligo was found to be associated with the TT and CT genotypes of rs10249788 [odds ratio (OR) 0·59, 95% confidence interval (CI) 0·38-0·93; P = 0·028 and OR 0·82, 95% CI 0·68-0·98; P = 0·032, respectively] as well as among subgroups: male, active, nonsegmental vitiligo, and onset age ≤ 20 years. Moreover, subjects with the combined (CT + TT)/GG genotype or T/G haplotype (rs10249788/rs2066853) showed a decreased risk for vitiligo (OR 0·57, 95% CI 0·37-0·87, P = 0·009 and OR 0·78, 95% CI 0·64-0·96, P = 0·033, respectively). CONCLUSIONS These results suggest that the T allele of rs10249788 located in the promoter of the AHR gene is associated with a protective effect on vitiligo in Han Chinese populations.
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Hui J, Yu J, Song P, Zhang B, Zhang W, Mu D, Han D, Ma L, Zhang X, Zhao S. Comparison of 18f-fluorothymidine and 18f-fluorodeoxyglucose PET/CT in Assessment of Chemoradioresponse in Esophageal Squamous Cell Cancer: A Pilot Study. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.499] [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]
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Seidler U, Song P, Xiao F, Riederer B, Bachmann O, Chen M. Recent advances in the molecular and functional characterization of acid/base and electrolyte transporters in the basolateral membranes of gastric and duodenal epithelial cells. Acta Physiol (Oxf) 2011; 201:3-20. [PMID: 20331540 DOI: 10.1111/j.1748-1716.2010.02107.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
All segments of the gastrointestinal tract are comprised of an elaborately folded epithelium that expresses a variety of cell types and performs multiple secretory and absorptive functions. While the apical membrane expresses the electrolyte transporters that secrete or absorb electrolytes and water, basolateral transporters regulate the secretory or absorptive rates. During gastric acid formation, Cl⁻/HCO₃⁻ and Na(+) /H(+) exchange and other transporters secure Cl⁻ re-supply as well as pH and volume regulation. Gastric surface cells utilize ion transporters to secrete HCO₃⁻, maintain pH(i) during a luminal acid load and repair damaged surface areas during the process of epithelial restitution. Na(+)/H(+) exchange and Na(+)/HCO₃⁻ cotransport serve basolateral acid/base import for gastroduodenal HCO₃⁻ secretion. The gastric and duodenal epithelium also absorbs salt and water. Recent molecular information on novel ion transporters expressed in the gastric and duodenal epithelium has exploded; however, a function has not been found yet for all transporters. The purpose of this review is to summarize current knowledge on the molecular identity and cellular function of basolateral ion transporters in the gastric and duodenal epithelium.
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Fu HS, Tu J, Cao JB, Song P, Reinisch BW, Gallagher DL, Yang B. IMAGE and DMSP observations of a density trough inside the plasmasphere. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja015104] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hu B, Song P, Li Y, Li W. Thermodynamics study of the Cs2SO4-MgSO4-H2O system at the temperature 298.15 K. RUSS J INORG CHEM+ 2010. [DOI: 10.1134/s0036023610070272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zong QG, Zhou XZ, Wang YF, Li X, Song P, Baker DN, Fritz TA, Daly PW, Dunlop M, Pedersen A. Energetic electron response to ULF waves induced by interplanetary shocks in the outer radiation belt. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009ja014393] [Citation(s) in RCA: 226] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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82
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Hollister-Smith J, Song P, Spindel E. Expression and characterization of nicotinic receptor polymorphisms in lung cancer cell lines. Biochem Pharmacol 2009. [DOI: 10.1016/j.bcp.2009.06.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zuo YG, Song P, Liu Z, Ho MG, Liu YH, Wang HW, Jin HZ, Sun QN. Lack of evidence for OSMR and RET gene mutations in a Chinese family with friction melanosis. Clin Exp Dermatol 2009; 35:282-6. [PMID: 19594765 DOI: 10.1111/j.1365-2230.2009.03426.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Friction melanosis (FM) is a common dermatological disorder. Although cases have been reported, familial FM is rare. FM and macular amyloidosis (MA) have been hypothesized to be identical clinical conditions, and cutaneous lichen amyloidosis (CLA) is linked to mutations in the OSMR (oncostatin M receptor) or RET (receptor tyrosine kinase) genes. AIM To evaluate the OSMR and RET gene mutations in a Chinese family with FM. Methods. We investigated a family with FM with six affected members in four successive generations. All 17 exons of the OSMR and 19 exons of the RET genes were screened for mutation by PCR, and restriction enzyme digestion assays for RET codon 634 mutations were performed for selected members of the family. RESULTS Based on the pedigree characteristics, we suggest an autosomal dominant mode of inheritance in this FM family. We did not detect any mutations in the OSMR or RET genes. CONCLUSIONS We report a rare case of familial FM. Genes other than OSMR and RET may be involved in the pathogenesis of this family.
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Kim H, Song P, Hyun C, Moon K, Jung H, Park T. MP-2.18: Detection Rate of Malignancy in Patients with Lower Urinary Tract Symptoms Without Pyuria. Urology 2008. [DOI: 10.1016/j.urology.2008.08.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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85
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Frenje JA, Casey DT, Li CK, Rygg JR, Séguin FH, Petrasso RD, Glebov VY, Meyerhofer DD, Sangster TC, Hatchett S, Haan S, Cerjan C, Landen O, Moran M, Song P, Wilson DC, Leeper RJ. First measurements of the absolute neutron spectrum using the magnetic recoil spectrometer at OMEGA (invited). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:10E502. [PMID: 19044488 DOI: 10.1063/1.2956837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A neutron spectrometer, called a magnetic recoil spectrometer (MRS), has been built and implemented at the OMEGA laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] for absolute measurements of the neutron spectrum in the range of 6-30 MeV, from which fuel areal density (rhoR), ion temperature (T(i)), and yield (Y(n)) can be determined. The results from the first MRS measurements of the absolute neutron spectrum are presented. In addition, measuring rhoR at the National Ignition Facility (NIF) [G. H. Miller et al., Nucl. Fusion 44, S228 (2004)] will be essential for assessing implosion performance during all stages of development from surrogate implosions to cryogenic fizzles to ignited implosions. To accomplish this, we are also developing an MRS for the NIF. As much of the research and development and instrument optimization of the MRS at OMEGA are directly applicable to the MRS at the NIF, a description of the design and characterization of the MRS on the NIF is discussed as well.
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Starks MJ, Quinn RA, Ginet GP, Albert JM, Sales GS, Reinisch BW, Song P. Illumination of the plasmasphere by terrestrial very low frequency transmitters: Model validation. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008ja013112] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pan H, Song P, Han Z, Li Y, Li W, Xia S. Effects of pitzer mixing parameters on the solubility prediction of HCl-RbCl-H2O system at 25°C. RUSS J INORG CHEM+ 2007. [DOI: 10.1134/s0036023607110277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Droma Y, Kunii O, Yangzom Y, Shan M, Pingzo L, Song P. Prevalence and severity of asthma and allergies in schoolchildren in Lhasa, Tibet. Clin Exp Allergy 2007; 37:1326-33. [PMID: 17845413 DOI: 10.1111/j.1365-2222.2007.02781.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND The International Study of Asthma and Allergies in Childhood (ISAAC) demonstrated that large variations existed in the prevalence of symptoms of asthma, allergic rhinoconjunctivitis and eczema throughout the world and that environmental factors and lifestyle customs are major determinants of the prevalence and severity of these diseases. However, the relevant data about children living at high-altitude locations were considered to be underreported. OBJECTIVE The ISAAC Phase III programme was carried out in Lhasa, the Tibetan Autonomous Region in China, at an elevation of 3658 m above sea level to examine the occurrence of asthma, allergic rhinoconjunctivitis and eczema in schoolchildren aged 13-14 years. METHODS All 3196 schoolchildren in eight public junior high schools in urban Lhasa who were confirmed to be 13-14 years old were invited and participated in both written and video questionnaire investigations, among which 3190 pieces of data (49.8% of boys and 50.2% of girls) were validated and analysed. RESULTS Among the overall observations, the prevalence of 'having ever experienced wheezing', 'current wheezing' and 'diagnosed to have asthma' was 1.4%, 0.8% and 1.1%, respectively. The prevalence of current exercise-induced asthma and current nocturnal cough was 7.1% and 4.6%, respectively. The current prevalence of allergic rhinoconjunctivitis and eczema was 5.2% and 0.4%, respectively. In addition, the prevalence of rhinoconjunctivitis symptoms during the past 12 months showed no discernable differences throughout the year. CONCLUSION The prevalence of asthma, allergic rhinoconjunctivitis and eczema over the past 12 months was the lowest among the centres, that performed ISAAC worldwide.
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Wang H, Durham L, Dawson H, Song P, Warner D, Sullivan P, Vitek M, Laskowitz D. Corrigendum to “an apolipoprotein e-based therapeutic improves outcome and reduces alzheimer’s disease pathology following closed head injury: Evidence of pharmacogenomic interaction”. Neuroscience 2007. [DOI: 10.1016/j.neuroscience.2007.01.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Wang H, Durham L, Dawson H, Song P, Warner DS, Sullivan PM, Vitek MP, Laskowitz DT. An apolipoprotein E-based therapeutic improves outcome and reduces Alzheimer's disease pathology following closed head injury: evidence of pharmacogenomic interaction. Neuroscience 2006; 144:1324-33. [PMID: 17187933 DOI: 10.1016/j.neuroscience.2006.11.017] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 09/08/2006] [Accepted: 11/01/2006] [Indexed: 11/21/2022]
Abstract
Apolipoprotein E (apoE) modifies glial activation and the CNS inflammatory response in an isoform-specific manner. Peptides derived from the receptor-binding region of apoE have been demonstrated to maintain the functional activity of the intact protein, and to improve histological and functional deficits after closed head injury. In the current study, APOE2, APOE3, and APOE4 targeted replacement (TR) mice expressing the human apoE protein isoforms (apoE2, apoE3 and apoE4) were used in a clinically relevant model of closed head injury to assess the interaction between the humanized apoE background and the therapeutic apoE mimetic peptide, apoE(133-149). Treatment with the apoE-mimetic peptide reduced microglial activation and early inflammatory events in all of the targeted replacement animals and was associated with histological and functional improvement in the APOE2TR and APOE3TR animals. Similarly, brain beta amyloid protein (Abeta)(1-42) levels were increased as a function of head injury in all of the targeted replacement mice, while treatment with apoE peptide suppressed Abeta(1-42) levels in the APOE2TR and APOE3TR animals. These results suggest a pharmacogenomic interaction between the therapeutic effects of the apoE mimetic peptide and the human apoE protein isoforms. Furthermore, they suggest that administration of apoE-mimetic peptides may serve as a novel therapeutic strategy for the treatment of acute and chronic neurological disease.
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Li Y, Song P, Xia S, Li W, Gao S. Effects of Pitzer mixing parameters on the solubility prediction of HCl-CsCl-H2O system at 25°C. RUSS J INORG CHEM+ 2006. [DOI: 10.1134/s0036023606100238] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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92
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Yao C, Guan W, Song P, Su ZM, Feng JD, Yan LK, Wu ZJ. Electronic Structures of 5d Transition Metal Monoxides by Density Functional Theory. Theor Chem Acc 2006. [DOI: 10.1007/s00214-006-0147-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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93
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Song P. Effects of norepinephrine on C—fos expression in the cochlear nucleus. Otolaryngol Head Neck Surg 2003. [DOI: 10.1016/s0194-5998(03)00779-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Song P, Sekhon HS, Proskocil B, Blusztajn JK, Mark GP, Spindel ER. Synthesis of acetylcholine by lung cancer. Life Sci 2003; 72:2159-68. [PMID: 12628474 DOI: 10.1016/s0024-3205(03)00078-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The role of autocrine growth factors in the stimulation of lung cancer growth is well established. Nicotine is an agonist for acetylcholine receptors and stimulates lung cancer growth. This suggests that if lung cancers synthesize acetylcholine (ACh), then ACh may be an autocrine growth factor for lung cancer. Analysis of normal lung demonstrated that the cells of origin of lung cancers express the proteins necessary for non-neuronal ACh storage and synthesis. Analysis of mRNA from squamous cell lung carcinoma, small cell lung carcinoma (SCLC) and adenocarcinoma showed synthesis of choline acetyltransferase (ChAT) and nicotinic receptors. Immunohistochemical analysis of a retrospective series of SCLC and adenocarcinomas showed that more than 50% of the lung cancers screened expressed ChAT and nicotinic receptors. To study the effect of endogenous ACh synthesis on growth, SCLC cell lines were studied. SCLC cell lines were found to express ChAT mRNA and to secrete ACh into the medium as measured by HPLC separation and enzymatically-coupled electrochemical detection. The SCLC cell line NCI-H82 synthesized highest levels of ACh. Showing that the endogenously synthesized ACh interacted with its receptors to stimulate cell growth, addition of muscarinic and nicotinic antagonists slowed H82 cell proliferation. These findings demonstrate that lung cancer cell lines synthesize and secrete ACh to act as an autocrine growth factor. The existence of a cholinergic autocrine loop in lung cancer provides a basis for understanding the effects of nicotine in cigarette smoke on lung cancer growth and provides a new pathway to investigate for potential therapeutic approaches to lung cancer.
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Abstract
Glial response to chronic morphine treatment was examined by immunohistochemistry of glial fibrillary acidic protein (GFAP), a specific marker for astroglial cells. Systemic administration of morphine (50 mg/kg, i.p.) once daily for 9 consecutive days led to significant increase in GFAP immunostaining density in the spinal cord, posterior cingulate cortex and hippocampus but not in the thalamus. This increase was attributed primarily to hypertrophy of astroglial cells rather than their proliferation or migration. When chronic morphine (20 microg/2 microl, i.t.) was delivered in combination with fluorocitrate (1 nmol/1 microl, i.t.), a specific and reversible inhibitor of glial cells, spinal tolerance to morphine analgesia was partly but significantly attenuated as measured by behavioural test and the increase in spinal GFAP immunostaining was also greatly blocked. The present investigation provides the first evidence for the role of glial cells in the development of morphine tolerance in vivo.
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Franco L, Bruzzone S, Song P, Guida L, Zocchi E, Walseth TF, Crimi E, Usai C, De Flora A, Brusasco V. Extracellular cyclic ADP-ribose potentiates ACh-induced contraction in bovine tracheal smooth muscle. Am J Physiol Lung Cell Mol Physiol 2001; 280:L98-L106. [PMID: 11133499 DOI: 10.1152/ajplung.2001.280.1.l98] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cyclic ADP-ribose (cADPR), a universal calcium releaser, is generated from NAD(+) by an ADP-ribosyl cyclase and is degraded to ADP-ribose by a cADPR hydrolase. In mammals, both activities are expressed as ectoenzymes by the transmembrane glycoprotein CD38. CD38 was identified in both epithelial cells and smooth myocytes isolated from bovine trachea. Intact tracheal smooth myocytes (TSMs) responded to extracellular cADPR (100 microM) with an increase in intracellular calcium concentration ([Ca(2+)](i)) both at baseline and after acetylcholine (ACh) stimulation. The nonhydrolyzable analog 3-deaza-cADPR (10 nM) elicited the same effects as cADPR, whereas the cADPR antagonist 8-NH(2)-cADPR (10 microM) inhibited both basal and ACh-stimulated [Ca(2+)](i) levels. Extracellular cADPR or 3-deaza-cADPR caused a significant increase of ACh-induced contraction in tracheal smooth muscle strips, whereas 8-NH(2)-cADPR decreased it. Tracheal mucosa strips, by releasing NAD(+), enhanced [Ca(2+)](i) in isolated TSMs, and this increase was abrogated by either NAD(+)-ase or 8-NH(2)-cADPR. These data suggest the existence of a paracrine mechanism whereby mucosa-released extracellular NAD(+) plays a hormonelike function and cADPR behaves as second messenger regulating calcium-related contractility in TSMs.
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Stopa EG, Berzin TM, Kim S, Song P, Kuo-LeBlanc V, Rodriguez-Wolf M, Baird A, Johanson CE. Human choroid plexus growth factors: What are the implications for CSF dynamics in Alzheimer's disease? Exp Neurol 2001; 167:40-7. [PMID: 11161591 DOI: 10.1006/exnr.2000.7545] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The choroid plexus plays a key role in supporting neuronal function by secreting cerebrospinal fluid (CSF) and may be involved in the regulation of various soluble factors. Because the choroid plexus is involved in growth factor secretion as well as CSF dynamics, it is important to understand how growth factors in CSF interact with the brain parenchyma as well as with cells in direct contact with the flowing CSF, i.e., choroid plexus and arachnoid villi. While the existence of growth factors in the choroid plexus has been documented in several animal models, the presence and distribution of growth factors in the human choroid plexus has not been extensively examined. This study describes the general distribution and possible functions of a number of key proteins in the human choroid plexus and arachnoid villi, including basic fibroblast growth factor, FGF receptor, and vascular endothelial growth factor. FGF and VEGF could both be readily demonstrated in choroid plexus epithelial cells. The presence of FGF and VEGF within the choroid plexus was also confirmed by ELISA analysis. Since Alzheimer's disease (AD) is known to be associated with a number of growth factor abnormalities, we examined the choroid plexus and arachnoid villi from AD patients. Immunohistochemical studies revealed the presence of FGF and VEGF within the AD choroid plexus and an increased density of FGFr in both the choroid plexus and the arachnoid villi of AD patients. No qualitative changes in the distribution of FGF and VEGF were observed in the AD choroid plexus. The appearance of FGFr in AD arachnoid was associated with robust amyloid and vimentin immunoreactivity. These findings confirm the presence of FGF and VEGF within the normal and AD choroid plexus and suggest that the alteration of growth factors and their receptors may contribute to the pathogenesis of the hydrocephalus ex vacuo that is characteristically seen in AD.
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Abstract
The present study was designed to investigate the involvement of mu receptor in interleukin 2-induced antinociception. Intraplantar injection of human recombinant interleukin 2 (rIL-2) (1. 5x10(4) U) significantly enhanced pain threshold as measured by paw withdrawal latencies (PWLs) to noxious radiant heat in normal rats. After administration of rIL-2, PWLs were also markedly increased in morphine-tolerant and chronic constriction injury (CCI)-operated rats, which have been proven morphine-insensitive. rIL-2-induced antinociception in both morphine-tolerant and CCI-operated rats was significantly lower than that in normal rats. rIL-2 antinociception was partially blocked by naloxone (1 mg/kg i.p.) in normal rats but remained unchanged in the CCI group. Our results suggest that the use of rIL-2 in human medical practice may be extended for its effectiveness in relief of neuropathic pain induced by CCI. Here we infer that mu receptor plays an critical role in IL-2-induced antinociception and that there are also some other receptors involved in this process.
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Song P, Milanese M, Crimi E, Bruzzone S, Zocchi E, Rehder K, Brusasco V. G(s) protein dysfunction in allergen-challenged human isolated passively sensitized bronchi. Am J Physiol Lung Cell Mol Physiol 2000; 279:L209-15. [PMID: 10926543 DOI: 10.1152/ajplung.2000.279.2.l209] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We studied the intracellular mechanisms of allergen-induced beta(2)-adrenoceptor dysfunction in human isolated passively sensitized bronchi. Sensitization was obtained by overnight incubation of bronchial rings with serum containing a high specific IgE level to Dermatophagoides but a low total IgE level. Allergen challenge was done by incubation with a Dermatophagoides mix. The G(s) protein stimulant cholera toxin (2 microg/ml) displaced the carbachol (CCh) concentration-response curves of control and sensitized but not of challenged rings to the right. Cholera toxin (10 microg/ml) displaced the concentration-response curves to CCh of control, sensitized, and challenged rings to the right, but this effect was less in challenged rings. The effects of the G(i) protein inhibitor pertussis toxin (250 ng/ml or 1 microg/ml) on salbutamol concentration-relaxation curves did not differ significantly between challenged and sensitized rings. The adenylyl cyclase activator forskolin and the Ca(2+)-activated K(+)-channel opener NS-1619 relaxed CCh-contracted bronchial rings without significant differences between control, sensitized, and challenged rings. Neither G(i) nor G(s) alpha-subunit expression differed between control, sensitized, and challenged tissues. We conclude that G(s) protein dysfunction may be a mechanism of allergen-induced beta(2)-adrenoceptor dysfunction in human isolated passively sensitized bronchi.
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Prayson RA, Mohan DS, Song P, Suh JH. Clinicopathologic study of forty-four histologically pure supratentorial oligodendrogliomas. Ann Diagn Pathol 2000; 4:218-27. [PMID: 10982299 DOI: 10.1053/adpa.2000.8124] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Few studies in recent years have specifically focused on pure oligodendroglial neoplasms. We retrospectively reviewed the clinicopathologic features of 44 patients with supratentorial oligodendroglioma diagnosed over a 19-year period (1974 to 1993). The study group consisted of 44 patients (age range, 8 to 69 years; median, 42 years), including 31 males. Thirty-one initially resected tumors (70%) were low grade and 13 (30%) were high grade (anaplastic). Using the St Anne-Mayo criteria for astrocytic tumors, 19 tumors (43%) were grade 2, 17 (39%) were grade 3, and 8 were (18%) grade 4. Histologic features of the tumors at initial resection included prominent nucleoli (N = 18, 41%), vascular proliferation (N = 9, 20%), necrosis (N = 6, 14%), and microcystic degeneration (N = 23, 52%). Nuclear atypia was graded as mild in 22 tumors (50%), moderate in 18 (41%), and marked in four (9%). The highest mitosis counts ranged from 0 to 10 mitotic figures (MF)/10 high-power fields (HPF) (mean, 2.4). Twelve patients (27%) had four or more MF/10 HPF. Initial surgery included gross total resection in 10 patients, subtotal resection in 16 patients, and biopsy in 14 patients. Thirty-one patients received adjuvant radiotherapy and 15 received chemotherapy. MIB-1 labeling indices ranged from 0 to 42.3 (median, 1.2 [low grade tumor median, 0.5; anaplastic tumor median, 6.2]). p53 immunostaining was observed in 18 of 43 stained tumors (41%). Overall, 5- and 10-year survival rates were 71% and 63%, respectively. The entire group had a median follow-up of 5.2 years. Age greater than 45 years (P = .02), mitosis counts of > or =4 MF/10 HPF (P = .0004), and MIB-1 labeling indices <2 (P = .03) were independent predictors of survival (Kaplan-Meier analysis). MIB-1 labeling indices <2 (P = .0009) was an independent predictor of disease-free survival. Low cell density (P = .04) and low histologic grade (P = .03) show trends with regard to being associated with longer survival. In conclusion, older patients (>45 years) or patients with tumors with an increased rate of cell proliferation generally have a worse prognosis. Although tumors of high histologic grade generally have a worse survival, the correlation was not statistically significant.
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