1
|
Chang W, Jo H, Cha M, Chang J. PO-1476 Early antiarrhythmic efficacy of noninvasive cardiac radioablation for ventricular tachycardia. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03440-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
2
|
Cho S, Kim T, Uhm J, Cha M, Lee J, Park J, Park J, Kang K, Shim J, Kim J, Park H, Choi E, Kim J, Lee Y, Joung B. P3762The impact of type and burden of atrial fibrillation on stroke occurrence in patients with atrial fibrillation: from a prospective cohort of atrial fibrillation patients (CODE-AF Registry). Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0614] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background and purpose
Although several studies reported that stroke risk in patients with paroxysmal atrial fibrillation (AF) is similar to those with persistent or permanent AF, there is still controversy on the relationship of AF type and stroke occurrence. We investigated the effect of AF type on AF burden and stroke risk in patients with non-valvular AF.
Methods
Within the CODE-AF prospective, outpatient registry (COmparison study of Drugs for symptom control and complication prEvention of Atrial Fibrillation), we identified 8,883 patients ≥18 years of age with non-valvular AF and eligible follow-up visits. We compared AF burden and stroke risk among patients with 3 types of AF: paroxysmal (n=5,808) or persistent (n=2,806) or permanent (n=269).
Results
The median age of the overall population was 68.0 (interquartile range, 60.0–75.0); 36.0% were female. Patients with persistent and permanent AF were older and had higher CHA2DS2-VASc scores and anticoagulation rate than those with paroxysmal AF. Compared with permanent AF (5.2±16.4%), the arrhythmic burden of AF on 24hrs Holter monitoring was significantly lower in paroxysmal AF (2.1±7.2%, p<0.001) and persistent AF (2.0±7.5%, p<0.001). During median follow-up period of 1.38 years (interquartile range: 0.96–1.67), total 82 (0.92%) patients experienced ischemic stroke with incidence rates of 0.51, 1.04 and 1.69 events per 100 person-years for paroxysmal, persistent and permanent AF, respectively. Compared with paroxysmal AF, the risk of ischemic stroke was increased in persistent AF with clinical variable adjusted hazard ratio (aHR) of 1.94 (95% confidence intervals [CI], 1.23–3.07; P=0.005) and permanent AF with aHR of 2.64 (95% CI, 1.09–6.41; P=0.03).
AF type and HR of stroke occurrence Paroxysmal (n=5,808) Persistent (n=2,806) Permanent (n=269) Stoke events 39 37 6 Person years (PYs) 7673 3544 356 /100 PYs 0.51 1.04 1.69 HR (95% CI), p-value HR (95% CI), p-value HR (95% CI), p-value Unadjusted HR 1 (Reference) 2.05 (1.27–3.31), 0.003 3.32 (1.15–7.90), 0.02 Clinical variables adjusted HR 1 (Reference) 1.94 (1.23–3.07), 0.005 2.64 (1.09–6.41), 0.03 PYs: Person years; HR: Hazard ratio.
Conclusion
Persistent and permanent AF was associated with the increased risk of stroke than paroxysmal AF, after adjustment of clinical variables including age, sex, comorbidities and anticoagulation rate. These results suggest that AF type and burden might be related with the risk of ischemic stroke and should be considered in the stroke prevention of AF.
Collapse
Affiliation(s)
- S Cho
- Severance Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - T Kim
- Severance Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J Uhm
- Severance Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - M Cha
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J Lee
- Kyung Hee Medical Center, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J Park
- Ewha University, Department of Cardiology, School of Medicine, Seoul, Korea (Republic of)
| | - J Park
- Hanyang University, Department of Cardiology, Seoul, Korea (Republic of)
| | - K Kang
- Eulji University Hospital, Division of Cardiology, Deajeon, Korea (Republic of)
| | - J Shim
- Korea University, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J Kim
- Asan Medical Center, Heart Institute, Seoul, Korea (Republic of)
| | - H Park
- Chonnam National University Hospital, Department of Cardiology, Gwangju, Korea (Republic of)
| | - E Choi
- Seoul National University Hospital, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - J Kim
- Kyung Hee Medical Center, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| | - Y Lee
- Catholic University of Daegu, Division of Cardiology, Department of Internal Medicine, Daegu, Korea (Republic of)
| | - B Joung
- Severance Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea (Republic of)
| |
Collapse
|
3
|
Cha M, Sallem I, Jang HW, Jung IY. Role of transient receptor potential vanilloid type 1 in the trigeminal ganglion and brain stem following dental pulp inflammation. Int Endod J 2019; 53:62-71. [DOI: 10.1111/iej.13204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 08/12/2019] [Indexed: 12/22/2022]
Affiliation(s)
- M. Cha
- Department of Physiology Oral Science Research Center Yonsei University College of Dentistry Seoul Korea
| | - I. Sallem
- Department of Conservative Dentistry and Oral Science Research Center Yonsei University College of Dentistry Seoul Korea
| | - H. W. Jang
- Department of Conservative Dentistry and Oral Science Research Center Yonsei University College of Dentistry Seoul Korea
| | - I. Y. Jung
- Department of Conservative Dentistry and Oral Science Research Center Yonsei University College of Dentistry Seoul Korea
| |
Collapse
|
4
|
Hsieh MH, Choe JH, Gadhvi J, Kim YJ, Arguez MA, Palmer M, Gerold H, Nowak C, Do H, Mazambani S, Knighton JK, Cha M, Goodwin J, Kang MK, Jeong JY, Lee SY, Faubert B, Xuan Z, Abel ED, Scafoglio C, Shackelford DB, Minna JD, Singh PK, Shulaev V, Bleris L, Hoyt K, Kim J, Inoue M, DeBerardinis RJ, Kim TH, Kim JW. p63 and SOX2 Dictate Glucose Reliance and Metabolic Vulnerabilities in Squamous Cell Carcinomas. Cell Rep 2019; 28:1860-1878.e9. [PMID: 31412252 PMCID: PMC7048935 DOI: 10.1016/j.celrep.2019.07.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/17/2019] [Accepted: 07/11/2019] [Indexed: 12/21/2022] Open
Abstract
Squamous cell carcinoma (SCC), a malignancy arising across multiple anatomical sites, is responsible for significant cancer mortality due to insufficient therapeutic options. Here, we identify exceptional glucose reliance among SCCs dictated by hyperactive GLUT1-mediated glucose influx. Mechanistically, squamous lineage transcription factors p63 and SOX2 transactivate the intronic enhancer cluster of SLC2A1. Elevated glucose influx fuels generation of NADPH and GSH, thereby heightening the anti-oxidative capacity in SCC tumors. Systemic glucose restriction by ketogenic diet and inhibiting renal glucose reabsorption with SGLT2 inhibitor precipitate intratumoral oxidative stress and tumor growth inhibition. Furthermore, reduction of blood glucose lowers blood insulin levels, which suppresses PI3K/AKT signaling in SCC cells. Clinically, we demonstrate a robust correlation between blood glucose concentration and worse survival among SCC patients. Collectively, this study identifies the exceptional glucose reliance of SCC and suggests its candidacy as a highly vulnerable cancer type to be targeted by systemic glucose restriction.
Collapse
Affiliation(s)
- Meng-Hsiung Hsieh
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Joshua H Choe
- Department of Biological Sciences, Columbia University, New York, NY, USA
| | - Jashkaran Gadhvi
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Yoon Jung Kim
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Marcus A Arguez
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Madison Palmer
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Haleigh Gerold
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Chance Nowak
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Hung Do
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Simbarashe Mazambani
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Jordan K Knighton
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Matthew Cha
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Justin Goodwin
- Graduate School of Art and Sciences and School of Medicine, Yale University, New Haven, CT, USA
| | - Min Kyu Kang
- Department of Radiation Oncology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Ji Yun Jeong
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Shin Yup Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Brandon Faubert
- Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Zhenyu Xuan
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA; Center for Systems Biology, The University of Texas at Dallas, Richardson, TX, USA
| | - E Dale Abel
- Division of Endocrinology and Metabolism and the Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Claudio Scafoglio
- Department of Pulmonary and Critical Care Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - David B Shackelford
- Department of Pulmonary and Critical Care Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - John D Minna
- Hamon Center for Therapeutic Oncology Research, Simmons Comprehensive Cancer Center, Departments of Medicine and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Pankaj K Singh
- Eppley Institute for Cancer Research, University of Nebraska Medical Center, Omaha, NE, USA
| | - Vladimir Shulaev
- Department of Biological Sciences, College of Science, Advanced Environmental Research Institute, University of North Texas, Denton, TX, USA
| | - Leonidas Bleris
- Department of Bioengineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Kenneth Hoyt
- Department of Bioengineering, The University of Texas at Dallas, Richardson, TX, USA
| | - James Kim
- Department of Internal Medicine, Hamon Center for Therapeutic Oncology Research, and Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Masahiro Inoue
- Department of Clinical Bio-resource Research and Development, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ralph J DeBerardinis
- Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Tae Hoon Kim
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Jung-Whan Kim
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA.
| |
Collapse
|
5
|
Ko SG, Go H, Sun S, Lee S, Park W, Choi Y, Song Y, Hwang G, Kim G, Jeon C, Park J, Lee K, Cha M, Bang O, Jung H, Kim N, Shin YC. Green tea consumption, abdominal obesity as related factors of lacunar infarction in Korean women. J Nutr Health Aging 2011; 15:542-50. [PMID: 21808932 DOI: 10.1007/s12603-011-0054-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVES Our purpose was to evaluate interaction of green tea consumption and abdominal obesity as related factors for lacunar infarction in Korean women. DESIGN A hospital-based, incident case-control study. SETTINGS The Prevention and Managements of Stroke in Women study. PARTICIPANTS Cases (n=233) of first incident lacunar infarction were enrolled and matched by age to stroke-free hospital controls (n=204). MEASUREMENTS The data were collected through face-to-face interviews by well trained research assistants to assess demographic, medical, lifestyle, marital status, religions status, green tea consumptions, family history of stroke, smoking status, alcohol consumption, meat and vegetable intake frequency, and past history of hypertension. Biochemical analysis, fasting blood specimens for lipid, glucose, and cholesterol level were acquired. RESULTS Compared with the non green tea consumer and obese women group, only the green tea consumption and non obese women group had a protective effect of lacunar infarction when adjusted for age, and age plus diet factors (OR, 0.23; 95% CI, 0.09, 0.59; OR, 0.21; 95% CI, 0.08, 0.56 respectively), but lost their significance after adjustment for age, diet factors, vascular risk factors and full model included atherogenic index factors (OR, 0.32; 95% CI, 0.09 to 1.01; OR, 0.49; 95% CI, 0.12, 1.89 respectively). CONCLUSIONS The interaction of green tea consumption and non obesity have reduced risk of lacunar infarction, but not after adjustment for age, diet factors, vascular risk factors and atherogenic index. Also individually green tea consumption and abdominal obesity have failed to find an independent relationship with lacunar infarction after adjustment by all risk factors. Green tea consumption and green tea consumption with non obese group seemed to have a protective effect for lacunar infarction. In the results of our study, these results still remain controversial, and then we need further and larger study to get at the root of real causal effect of both relationships.
Collapse
Affiliation(s)
- S-G Ko
- Center for Clinical Research and Genomics, Kyung Hee University, Seoul
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Han M, Cha M, Kim J, Kim J. The Expression and Activation of Cytochrome P450 1A1 in Endometrial Carcinoma Cells Are Involved in Benzo[a]Pyrene-Induced Cytotoxicity. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
7
|
Yoon J, Cha M. Initiative for the terminally ill on Medicare. J Palliat Med 2005; 2:369-70. [PMID: 15859775 DOI: 10.1089/jpm.1999.2.369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Yoon
- Medicare Rights Center, Inc., New York, New York 10036, USA
| | | |
Collapse
|
8
|
Lee J, Kim S, Choi J, Hwang H, Cha M, Kim J. Tertiary treatment of biologically treated piggery wastewater using vibratory shear-enhanced RO membrane. Water Sci Technol 2004; 49:435-442. [PMID: 15137455] [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: 05/24/2023]
Abstract
This study presents a good example for the tertiary treatment of biologically treated piggery wastewater using vibratory shear enhanced RO membrane (VSEP RO). Through a simple process combination, utilizing Bioceramic SBR(BCS) and VSEP RO, at Gimhae plant livestock wastewater is treated excellently to meet the strict effluent standards. Application of RO membrane directly to the biologically treated effluent has been successful without any pretreatment to reduce high suspended solids. The combination of VESP UF followed by RO filtration processes produced a higher recovery rate in the 3-week pilot test.
Collapse
Affiliation(s)
- J Lee
- Environmental Vision 21 Ltd., 789-6 Yoksam-dong, Gangnam-gu, Seoul, 135-080, Korea.
| | | | | | | | | | | |
Collapse
|
9
|
Abstract
An ellipsometric method for measuring second-order cascaded phase shift is experimentally demonstrated in a KNbO(3) single crystal. We analyze the polarization state composed of the two orthogonal polarizations of the transmitted fundamental wave, one of which experiences intensity-dependent depletion and phase shift while the other does not. This method does not require a well-defined beam profile or interferometric stability.
Collapse
|
10
|
Abstract
I propose a method for enhancing the cascaded phase shift of the fundamental wave associated with second-harmonic generation in aperiodic quasi-phase matched (QPM) gratings. The position and length of one of the domains were varied to maximize the cascaded phase shift. A maximum enhancement of 84% in the cascaded phase shift relative to a perfectly periodic QPM grating was obtained at a moderate fundamental input intensity without initial seeding of the second-harmonic wave. All-optical intensity modulation is also proposed with another optimized aperiodic QPM grating.
Collapse
|
11
|
McElvain J, Cha M, Yu H, Zhang N, Wudl F, Heeger A. Third harmonic generation spectrum of a degenerate ground state conjugated polymer. Direct evidence of simultaneous two- and three-photon resonance. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)01219-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Beljonne D, Brédas JL, Cha M, Torruellas WE, Stegeman GI, Hofstraat JW, Horsthuis WHG, Möhlmann GR. Two‐photon absorption and third‐harmonic generation of di‐alkyl‐amino‐nitro‐stilbene (DANS): A joint experimental and theoretical study. J Chem Phys 1995. [DOI: 10.1063/1.470200] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Lawrence B, Torruellas WE, Cha M, Sundheimer ML, Stegeman GI, Meth J, Etemad S, Baker G. Identification and role of two-photon excited states in a pi -conjugated polymer. Phys Rev Lett 1994; 73:597-600. [PMID: 10057487 DOI: 10.1103/physrevlett.73.597] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
14
|
Cronin B, Overfelt K, Fouchereaux K, Manzvanzvike T, Cha M, Sona E. The internet and competitive intelligence: A survey of current practice. International Journal of Information Management 1994. [DOI: 10.1016/0268-4012(94)90060-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
15
|
Cha M, Neher D, Embs F, Mittler-Neher S, Stegeman G. Determination of the two first non-trivial orientational order parameters in LB films of rod-like molecules by third-order sum frequency mixing. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85348-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
16
|
Guo Y, Cha M, Chao A, Yuan C. [Determination of aucubin in Plantago asiatica L., P. major L. and P. depressa Willd. by HPLC]. Zhongguo Zhong Yao Za Zhi 1991; 16:743-4, 763. [PMID: 1811672] [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: 12/28/2022]
Abstract
A HPLC method for the determination of aucubin in P. asiatica, P. major and P. depressa was established. The mobile phase is MeOH-H2O (17:83). Good in producibility and high in rate of recovery, this method provides an effective way for the study of Plantago.
Collapse
Affiliation(s)
- Y Guo
- Dalian Municipal Institute for Drug Control
| | | | | | | |
Collapse
|
17
|
Hoffman HT, Subnani M, Cha M, Kidd L, Landman J, Tooley R, Carey TE. Calcium regulation of antigen expression on normal and malignant human squamous cells in vitro. Arch Otolaryngol Head Neck Surg 1990; 116:299-303. [PMID: 2306347 DOI: 10.1001/archotol.1990.01870030063010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In vitro, normal keratinocytes exhibit undifferentiated morphologic features and proliferate for multiple passages in low-calcium medium (less than or equal to 0.3 mmol/L) whereas, in high-calcium medium (greater than or equal to 1.0 mmol/L), these cells assume differentiation characteristics, begin to stratify, and eventually cease proliferating. In contrast, malignant keratinocytes grow well in high-calcium medium. Expression of pemphigus vulgaris antigen, a squamous cell marker, is altered on cultured normal keratinocytes by calcium. In this study we compared the effects of calcium levels on expression of cell surface antigens by UM-SCC-38, a human squamous carcinoma cell line, and normal keratinocytes cultured from newborn foreskin. Pemphigus, pemphigoid, beta 2-microglobulin antigens, as well as the epidermal growth factor receptor and the A9 germinal epithelial cell basement membrane squamous carcinoma antigen were examined. Pemphigus antigen was strongly expressed on normal and malignant cells in high-calcium but not low-calcium medium. Calcium concentration did not affect the expression of any of the other antigens tested. Thus, although calcium induces differentiation and eventual loss of proliferative capacity in normal but not malignant keratinocytes in vitro, we were unable to demonstrate differences in pemphigus vulgaris antigen expression that might be linked to the growth inhibitory effects induced by high calcium levels in nontransformed epithelial cells in culture.
Collapse
Affiliation(s)
- H T Hoffman
- Department of Otolaryngology/Head and Neck Surgery, University of Michigan, Ann Arbor 48109-0506
| | | | | | | | | | | | | |
Collapse
|
18
|
Abstract
Addition of mammalian insulin to a nutritionally rich, chemically defined culture medium affects Neurospora crassa "slime" (wall-less) cells, as indicated by enhancement of growth, extension of viability at the stationary phase of growth, alteration of morphology, and stimulation of glucose oxidation. Bovine, porcine, and recombinant human insulin had similar effects on growth and morphology, while proinsulin, reduced insulin, and several other proteins were inactive. Insulin added in the presence of excess antiinsulin antibody was without activity. Intact cells possessed high affinity insulin-binding sites, represented by a curvilinear Scatchard plot, suggesting that effects are mediated through insulin receptors on the cell surface. These findings establish a role for insulin or insulin-like molecules in regulating growth and metabolism in this fungal cell and demonstrate a close similarity to insulin effects on certain mammalian cells.
Collapse
Affiliation(s)
- M A McKenzie
- Department of Physiology and Biophysics, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway 08854-5635
| | | | | | | |
Collapse
|