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Iida R, Ueki M, Yasuda T. Knockout of M-LP/Mpv17L, a newly identified atypical PDE, induces physiological afferent cardiac hypertrophy in mice. Transgenic Res 2023; 32:575-582. [PMID: 37851308 PMCID: PMC10713670 DOI: 10.1007/s11248-023-00373-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/10/2023] [Indexed: 10/19/2023]
Abstract
M-LP/Mpv17L (Mpv17-like protein) is an atypical cyclic nucleotide phosphodiesterase (PDE) without the molecular structure characteristic of the PDE family. Deficiency of M-LP/Mpv17L in mice has been found to result in development of β-cell hyperplasia and improved glucose tolerance. Here, we report another phenotype observed in M-LP/Mpv17L-knockout (KO) mice: afferent cardiac hypertrophy. Although the hearts of M-LP/Mpv17L-KO mice did not differ in size from those of wild-type mice, there was marked narrowing of the left ventricular lumen and thickening of the ventricular wall. The diameter and cross-sectional area of cardiomyocytes in 8-month-old M-LP/Mpv17L-KO mice were increased 1.16-fold and 1.35-fold, respectively, relative to control mice, but showed no obvious abnormalities of cell structure, fibrosis or impaired cardiac function. In 80-day-old KO mice, the expression of hypertrophic marker genes, brain natriuretic peptide (BNF), actin alpha cardiac muscle 1 (ACTC1) and actin alpha 1 skeletal muscle (ACTA1), as well as the Wnt/β-catenin pathway target genes, lymphoid enhancer-binding factor-1 (LEF1), axis inhibition protein 2 (AXIN2) and transcription factor 7 (TCF7), was significantly up-regulated relative to control mice, whereas fibrosis-related genes such as fibronectin 1 (FN1) and connective tissue growth factor (CTGF) were down-regulated. Western blot analysis revealed increased phosphorylation of molecules downstream of the cAMP/PKA signaling pathway, such as β-catenin, ryanodine receptor 2 (RyR2), phospholamban (PLN) and troponin I (cTnI), as well as members of the MEK1-ERK1/2 signaling pathway, which is strongly involved in afferent cardiac hypertrophy. Taken together, these findings indicate that M-LP/Mpv17L is one of the PDEs actively functioning in the heart and that deficiency of M-LP/Mpv17L in mice promotes physiological cardiac hypertrophy.
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Affiliation(s)
- Reiko Iida
- Molecular Neuroscience Unit, School of Medical Sciences, University of Fukui, Fukui, 910-1193, Japan.
| | - Misuzu Ueki
- Molecular Neuroscience Unit, School of Medical Sciences, University of Fukui, Fukui, 910-1193, Japan
| | - Toshihiro Yasuda
- Organization for Life Science Advancement Programs, University of Fukui, Fukui, 910-1193, Japan
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Hou X, Rong C, Zhang Q, Song S, Cong Y, Zhang HT. Cyclic Nucleotide Phosphodiesterases in Alcohol Use Disorders: Involving Gut Microbiota. Int J Neuropsychopharmacol 2022; 26:70-79. [PMID: 36087271 PMCID: PMC9850663 DOI: 10.1093/ijnp/pyac060] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 08/18/2022] [Accepted: 09/09/2022] [Indexed: 01/22/2023] Open
Abstract
Alcohol abuse is 1 of the most significant public health problems in the world. Chronic, excessive alcohol consumption not only causes alcohol use disorder (AUD) but also changes the gut and lung microbiota, including bacterial and nonbacterial types. Both types of microbiota can release toxins, further damaging the gastrointestinal and respiratory tracts; causing inflammation; and impairing the functions of the liver, lung, and brain, which in turn deteriorate AUD. Phosphodiesterases (PDEs) are critical in the control of intracellular cyclic nucleotides, including cyclic adenosine monophosphate and cyclic guanosine monophosphate. Inhibition of certain host PDEs reduces alcohol consumption and attenuates alcohol-related impairment. These PDEs are also expressed in the microbiota and may play a role in controlling microbiota-associated inflammation. Here, we summarize the influences of alcohol on gut/lung bacterial and nonbacterial microbiota as well as on the gut-liver/brain/lung axis. We then discuss the relationship between gut and lung microbiota-mediated PDE signaling and AUD consequences in addition to highlighting PDEs as potential targets for treatment of AUD.
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Affiliation(s)
- Xueqin Hou
- Correspondence: Xueqin Hou, PhD, Institute of Pharmacology, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China ()
| | | | - Qiwei Zhang
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Shuangshuang Song
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Yifan Cong
- Institute of Pharmacology, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, Shandong 271016, P.R. China
| | - Han-Ting Zhang
- Han-Ting Zhang, MD, PhD, Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, Shandong 266073, P.R. China ()
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Domin M, Hoffman CS. Methods to Assess Phosphodiesterase and/or Adenylyl Cyclase Activity Via Heterologous Expression in Fission Yeast. Methods Mol Biol 2022; 2483:93-104. [PMID: 35286671 DOI: 10.1007/978-1-0716-2245-2_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Heterologous expression of cyclic nucleotide phosphodiesterases (PDEs) and adenylyl cyclases (ACs) in the fission yeast Schizosaccharomyces pombe can be used in combination with PKA-repressed reporters to either carry out high throughput screens for small molecule inhibitors of these target enzymes or to assess hit compounds and their analogs from such screens. Here, we describe two methods for testing panels of such compounds. The first uses a growth assay for which growth in medium containing the pyrimidine analog 5-fluoro orotic acid (5FOA) occurs in response to inhibiting PDE activity to activate PKA. The second uses mass spectrometry to directly measure the impact of compound treatment to study compounds that modulate either PDE or AC activity.
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Affiliation(s)
- Marek Domin
- Mass Spectrometry Center, Chemistry Department, Boston College, Chestnut Hill, MA, USA
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Iida R, Ueki M, Yasuda T. Deficiency of M-LP/Mpv17L leads to development of β-cell hyperplasia and improved glucose tolerance via activation of the Wnt and TGF-β pathways. Biochim Biophys Acta Mol Basis Dis 2021; 1868:166318. [PMID: 34883249 DOI: 10.1016/j.bbadis.2021.166318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 11/13/2022]
Abstract
M-LP/Mpv17L is a protein that was initially identified during screening of age-dependently expressed genes in mice. We have recently demonstrated that M-LP/Mpv17L-knockout (M-LP/Mpv17L-KO) in human hepatoma cells leads to a reduction of cellular cyclic nucleotide phosphodiesterase (PDE) activity, and that in vitro-synthesized M-LP/Mpv17L possesses PDE activity. These findings suggest that M-LP/Mpv17L functions as an atypical PDE, even though it has none of the well-conserved catalytic region or other structural motifs characteristic of the PDE family. In this study, we found that M-LP/Mpv17L-KO mice developed β-cell hyperplasia and improved glucose tolerance. Deficiency of M-LP/Mpv17L in islets from KO mice at early postnatal stages or siRNA-mediated suppression of M-LP/Mpv17L in rat insulinoma cells led to marked upregulation of lymphoid enhancer binding factor 1 (Lef1) and transcription factor 7 (Tcf7), key nuclear effectors in the Wnt signaling pathway, and some of the factors essential for the development and maintenance of β-cells. Moreover, at the protein level, increases in the levels of phosphorylated β-catenin and glycogen synthase kinase-3β (GSK-3β) were observed, indicating activation of the Wnt and TGF-β signaling pathways. Taken together, these findings suggest that protein kinase A (PKA)-dependent phosphorylations of β-catenin and GSK-3β, the key mediators of the Wnt and/or TGF-β signaling pathways, are the most upstream events triggering β-cell hyperplasia and improved glucose tolerance caused by M-LP/Mpv17L deficiency.
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Affiliation(s)
- Reiko Iida
- Life Science Unit, School of Medical Sciences, University of Fukui, Fukui 910-1193, Japan; Life Science Innovation Center, University of Fukui, Fukui 910-1193, Japan.
| | - Misuzu Ueki
- Molecular Neuroscience Unit, School of Medical Sciences, University of Fukui, Fukui 910-1193, Japan
| | - Toshihiro Yasuda
- Life Science Innovation Center, University of Fukui, Fukui 910-1193, Japan
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Iida R, Ueki M, Yasuda T. Human Mpv17-like protein with a mitigating effect on mtDNA damage is involved in cAMP/PKA signaling in the mitochondrial matrix. Biochim Biophys Acta Mol Cell Res 2020; 1867:118792. [PMID: 32621840 DOI: 10.1016/j.bbamcr.2020.118792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/17/2020] [Accepted: 06/29/2020] [Indexed: 01/08/2023]
Abstract
Human Mpv17-like protein (M-LPH/Mpv17L) is thought to play a role in minimizing mitochondrial dysfunction caused by mitochondrial DNA (mtDNA) damage. We have recently demonstrated that, in addition to an increase of mtDNA damage, M-LPH-knockout (M-LPH-KO) in HepG2 cells causes a significant reduction of mitochondrial transcription factor A (TFAM) protein, an essential factor for mtDNA maintenance, along with an increase in its phosphorylation. These intracellular changes suggested an association of M-LPH with the cAMP/PKA signaling pathway, as selective degradation of TFAM by mitochondrial protease is driven by protein kinase A (PKA)-dependent phosphorylation. In the present study, we observed that M-LPH-KO in HepG2 cells caused an increase in the level of mitochondrial cAMP and a reduction of total cellular cyclic nucleotide phosphodiesterase (PDE) activity. In vitro-synthesized M-LPH showed PDE activity, which was inhibited by IBMX, a non-selective inhibitor of PDE. Furthermore, M-LPH-KO promoted PKA-dependent phosphorylation of some mitochondrial proteins. Taken together, the present findings suggest that M-LPH, which has structural features atypical of PDE family members, might be a novel human PDE involved in cAMP/PKA signaling in the mitochondrial matrix.
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Tetsi L, Charles AL, Paradis S, Lejay A, Talha S, Geny B, Lugnier C. Effects of cyclic nucleotide phosphodiesterases (PDEs) on mitochondrial skeletal muscle functions. Cell Mol Life Sci 2017; 74:1883-93. [PMID: 28039524 DOI: 10.1007/s00018-016-2446-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 12/31/2022]
Abstract
Mitochondria play a critical role in skeletal muscle metabolism and function, notably at the level of tissue respiration, which conduct muscle strength as well as muscle survival. Pathological conditions induce mitochondria dysfunctions notably characterized by free oxygen radical production disturbing intracellular signaling. In that way, the second messengers, cyclic AMP and cyclic GMP, control intracellular signaling at the physiological and transcription levels by governing phosphorylation cascades. Both nucleotides are specifically and selectively hydrolyzed in their respective 5'-nucleotide by cyclic nucleotide phosphodiesterases (PDEs), which constitute a multi-genic family differently tissue distributed and subcellularly compartmentalized. These PDEs are presently recognized as therapeutic targets for cardiovascular, pulmonary, and neurologic diseases. However, very few data concerning cyclic nucleotides and PDEs in skeletal muscle, specifically in mitochondria, are reported in the literature. The knowledge of PDE implication in mitochondrial signaling would be helpful for resolving critical mitochondrial dysfunctions in skeletal muscle.
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Xu C, Wyman AR, Alaamery MA, Argueta SA, Ivey FD, Meyers JA, Lerner A, Burdo TH, Connolly T, Hoffman CS, Chiles TC. Anti-inflammatory effects of novel barbituric acid derivatives in T lymphocytes. Int Immunopharmacol 2016; 38:223-32. [PMID: 27302770 DOI: 10.1016/j.intimp.2016.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 12/30/2015] [Revised: 06/01/2016] [Accepted: 06/06/2016] [Indexed: 12/24/2022]
Abstract
We have used a high throughput small molecule screen, using a fission yeast-based assay, to identify novel phosphodiesterase 7 (PDE7) inhibitors. One of the most effective hit compounds was BC12, a barbituric acid-based molecule that exhibits unusually potent immunosuppressive and immunomodulatory actions on T lymphocyte function, including inhibition of T cell proliferation and IL-2 cytokine production. BC12 treatment confers a >95% inhibition of IL-2 secretion in phytohaemagglutinin (PHA) plus phorbol-12-myristate-13-acetate (PMA) stimulated Jurkat T cells. The effect of BC12 on IL-2 secretion is not due to decreased cell viability; rather, BC12 blocks up-regulation of IL-2 transcription in activated T cells. BC12 also inhibits IL-2 secretion in human peripheral T lymphocytes stimulated in response to CD3/CD28 co-ligation or the combination of PMA and ionomycin, as well as the proliferation of primary murine T cells stimulated with PMA and ionomycin. A BC12 analog that lacks PDE7 inhibitory activity (BC12-4) displays similar biological activity, suggesting that BC12 does not act via PDE7 inhibition. To investigate the mechanism of inhibition of IL-2 production by BC12, we performed microarray analyses using unstimulated and stimulated Jurkat T cells in the presence or absence of BC12 or BC12-4. Our studies show these compounds affect the transcriptional response to stimulation and act via one or more shared targets to produce both anti-inflammatory and pro-stress effects. These results demonstrate potent immunomodulatory activity for BC12 and BC12-4 in T lymphocytes and suggest a potential clinical use as an immunotherapeutic to treat T lymphocyte-mediated diseases.
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Affiliation(s)
- Chenjia Xu
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Arlene R Wyman
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Manal A Alaamery
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Shannon A Argueta
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - F Douglas Ivey
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - John A Meyers
- Hematology and Medical Oncology, Boston University Medical Center, Boston, MA 02118, United States
| | - Adam Lerner
- Hematology and Medical Oncology, Boston University Medical Center, Boston, MA 02118, United States
| | - Tricia H Burdo
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Timothy Connolly
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Charles S Hoffman
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States
| | - Thomas C Chiles
- Departments of Biology, Boston College, Chestnut Hill, MA 02467, United States.
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Abstract
Inhibitors of PDE3, a family of dual-specificity cyclic nucleotide phosphodiesterases, are used clinically to increase cardiac contractility by raising intracellular cAMP content in cardiac myocytes and to reduce vascular resistance by increasing intracellular cGMP content in vascular smooth muscle myocytes. When used in the treatment of patients with heart failure, PDE3 inhibitors are effective in the acute setting but increase sudden cardiac death with long-term administration, possibly reflecting pro-apoptotic and pro-hypertrophic consequences of increased cAMP-mediated signaling in cardiac myocytes. cAMP-mediated signaling in cardiac myocytes is highly compartmentalized, and different phosphodiesterases, by controlling cAMP content in functionally discrete intracellular microcompartments, regulate different cAMP-mediated pathways. Four variants/isoforms of PDE3 (PDE3A1, PDE3A2, PDE3A3, and PDE3B) are expressed in cardiac myocytes, and new experimental results have demonstrated that these isoforms, which are differentially localized intracellularly through unique protein-protein interactions, control different physiologic responses. While the catalytic regions of these isoforms may be too similar to allow the catalytic activity of each isoform to be selectively inhibited, targeting their unique protein-protein interactions may allow desired responses to be elicited without the adverse consequences that limit the usefulness of existing PDE3 inhibitors.
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Affiliation(s)
- Matthew Movsesian
- VA Salt Lake City Health Care System, Salt Lake City, UT, USA; University of Utah, Salt Lake City, UT, USA.
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Mika D, Richter W, Westenbroek RE, Catterall WA, Conti M. PDE4B mediates local feedback regulation of β₁-adrenergic cAMP signaling in a sarcolemmal compartment of cardiac myocytes. J Cell Sci 2014; 127:1033-42. [PMID: 24413164 DOI: 10.1242/jcs.140251] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Multiple cAMP phosphodiesterase (PDE) isoforms play divergent roles in cardiac homeostasis but the molecular basis for their non-redundant function remains poorly understood. Here, we report a novel role for the PDE4B isoform in β-adrenergic (βAR) signaling in the heart. Genetic ablation of PDE4B disrupted βAR-induced cAMP transients, as measured by FRET sensors, at the sarcolemma but not in the bulk cytosol of cardiomyocytes. This effect was further restricted to a subsarcolemmal compartment because PDE4B regulates β1AR-, but not β2AR- or PGE2-induced responses. The spatially restricted function of PDE4B was confirmed by its selective effects on PKA-mediated phosphorylation patterns. PDE4B limited the PKA-mediated phosphorylation of key players in excitation-contraction coupling that reside in the sarcolemmal compartment, including L-type Ca(2+) channels and ryanodine receptors, but not phosphorylation of distal cytosolic proteins. β1AR- but not β2AR-ligation induced PKA-dependent activation of PDE4B and interruption of this negative feedback with PKA inhibitors increased sarcolemmal cAMP. Thus, PDE4B mediates a crucial PKA-dependent feedback that controls β1AR-dependent cAMP signals in a restricted subsarcolemmal domain. Disruption of this feedback augments local cAMP/PKA signals, leading to an increased intracellular Ca(2+) level and contraction rate.
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Affiliation(s)
- Delphine Mika
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco, San Francisco, CA 94143, USA
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Dong H, Claffey KP, Brocke S, Epstein PM. Expression of phosphodiesterase 6 (PDE6) in human breast cancer cells. Springerplus 2013; 2:680. [PMID: 24683528 PMCID: PMC3967736 DOI: 10.1186/2193-1801-2-680] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 11/20/2013] [Indexed: 12/21/2022]
Abstract
Considerable epidemiological evidence demonstrates a positive association between artificial light at night (LAN) levels and incidence rates of breast cancer, suggesting that exposure to LAN is a risk factor for breast cancer. There is a 30-50% higher risk of breast cancer in the highest LAN exposed countries compared to the lowest LAN countries, and studies showing higher incidence of breast cancer among shift workers exposed to more LAN have led the International Agency for Research on Cancer to classify shift work as a probable human carcinogen. Nevertheless, the means by which light can affect breast cancer is still unknown. In this study we examined established human breast cancer cell lines and patients’ primary breast cancer tissues for expression of genetic components of phosphodiesterase 6 (PDE6), a cGMP-specific PDE involved in transduction of the light signal, and previously thought to be selectively expressed in photoreceptors. By microarray analysis we find highly significant expression of mRNA for the PDE6B, PDE6C, and PDE6D genes in both the cell lines and patients’ tissues, minimal expression of PDE6A and PDE6G and no expression of PDE6H. Using antibody specific for PDE6β, we find expression of PDE6B protein in a wide range of patients’ tissues by immunohistochemistry, and in MCF-7 breast cancer cells by immunofluorescence and Western blot analysis. Considerable expression of key circadian genes, PERIOD 2, CLOCK, TIMELESS, CRYPTOCHROME 1, and CRYPTOCHROME 2 was also seen in all breast cancer cell lines and all patients’ breast cancer tissues. These studies indicate that genes for PDE6 and control of circadian rhythm are expressed in human breast cancer cells and tissues and may play a role in transducing the effects of light on breast cancer.
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Affiliation(s)
- Hongli Dong
- Departments of Cell Biology, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT 06030-3505 USA
| | - Kevin P Claffey
- Departments of Cell Biology, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT 06030-3505 USA
| | - Stefan Brocke
- Immunology, University of Connecticut Health Center, Farmington, CT 06030 USA
| | - Paul M Epstein
- Departments of Cell Biology, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT 06030-3505 USA
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