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Singh P, Goel H, Husain M, Lan X, Mikulak J, Malthotra A, Teichberg S, Schmidtmayerova H, Singhal PC. Tubular cell HIV-entry through apoptosed CD4 T cells: a novel pathway. Virology 2012; 434:68-77. [PMID: 23040891 DOI: 10.1016/j.virol.2012.09.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 08/28/2012] [Accepted: 09/14/2012] [Indexed: 01/12/2023]
Abstract
We hypothesized that HIV-1 may enter tubular cells by phagocytosis of apoptotic fragments of HIV-1-infected T cells infiltrating tubular interstitium. The study was designed to evaluate the interaction of programmed death-1 (PD-1) receptors on CD4 T cells and programmed death ligand-1 (PD-L1) on tubular cells (HK2 and HRPTEC, primary tubular cells). Co-cultivation of HIV-1 infected lymphocytes (HIV-LY) with HK2s/HRPTECs resulted in T cell apoptosis, uptake of the apoptosed HIV-LY by HK2s/HRPTECs, tubular cell activation and HIV expression. Cytochalasin-B inhibited tubular cell HIV-LY uptake and anti-PD-L1 antibody inhibited HIV-LY apoptosis and tubular cell HIV-LY uptake, activation and HIV expression. These observations do indicate induction of apoptosis of T cells due to interaction of PD-1 and PD-L1 upon co-cultivation and subsequent phygocytosis of HIV-laden apoptotic bodies by tubular cells and thus the transfer of HIV-1 into tubular cells. These findings identify a novel pathway that facilitates HIV-1 entry into tubular cell.
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Affiliation(s)
- Priyanka Singh
- Center for Excellence for Immunology and Inflammation, Feinstein Institute for Medical Research, Hofstra North Shore Long Island Jewish Medical School, New Hyde Park, NY, USA
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2
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Chu CC, Zhang L, Dhayalan A, Agagnina BM, Magli AR, Fraher G, Didier S, Johnson LP, Kennedy WJ, Damle RN, Yan XJ, Patten PEM, Teichberg S, Koduru P, Kolitz JE, Allen SL, Rai KR, Chiorazzi N. Torque teno virus 10 isolated by genome amplification techniques from a patient with concomitant chronic lymphocytic leukemia and polycythemia vera. Mol Med 2011; 17:1338-48. [PMID: 21953418 DOI: 10.2119/molmed.2010.00110] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 09/20/2011] [Indexed: 01/26/2023] Open
Abstract
An infectious etiology has been proposed for many human cancers, but rarely have specific agents been identified. One difficulty has been the need to propagate cancer cells in vitro to produce the infectious agent in detectable quantity. We hypothesized that genome amplification from small numbers of cells could be adapted to circumvent this difficulty. A patient with concomitant chronic lymphocytic leukemia (CLL) and polycythemia vera (PV) requiring therapeutic phlebotomy donated a large amount of phlebotomized blood to test this possibility. Using genome amplification methods, we identified a new isolate (BIS8-17) of torque teno virus (TTV) 10. The presence of blood isolate sequence 8-17 (BIS8-17) in the original plasma was confirmed by polymerase chain reaction (PCR), validating the approach, since TTV is a known plasma virus. Subsequent PCR testing of plasmas from additional patients showed that BIS8-17 had a similar incidence (~20%) in CLL (n = 48) or PV (n = 10) compared with healthy controls (n = 52). CLL cells do not harbor BIS8-17; PCR did not detect it in CLL peripheral blood genomic deoxyribonucleic acid (DNA) (n = 20). CLL patient clinical outcome or prognostic markers (immunoglobulin heavy chain variable region [IGHV ] mutation, CD38 or zeta-chain associated protein kinase 70 kDa [ZAP-70]) did not correlate with BIS8-17 infection. Although not causative to our knowledge, this is the first reported isolation and detection of TTV in either CLL or PV. TTV could serve as a covirus with another infectious agent or TTV variant with rearranged genetic components that contribute to disease pathogenesis. These results prove that this method identifies infectious agents and provides an experimental methodology to test correlation with disease.
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Affiliation(s)
- Charles C Chu
- The Feinstein Institute for Medical Research, North Shore-Long Island Jewish-LIJ Health System, Manhasset, New York, United States of America.
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3
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Kritharis A, Brody J, Koduru P, Teichberg S, Allen SL. Acute basophilic leukemia associated with loss of gene ETV6 and protean complications. J Clin Oncol 2011; 29:e623-6. [PMID: 21576634 DOI: 10.1200/jco.2010.34.5710] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
MESH Headings
- Aged, 80 and over
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Basophils/pathology
- Bone Marrow Examination
- Cardiovascular Diseases/diagnosis
- Cardiovascular Diseases/etiology
- Cardiovascular Diseases/therapy
- Electrocardiography
- Fatal Outcome
- Female
- Humans
- In Situ Hybridization, Fluorescence
- Leukemia, Basophilic, Acute/complications
- Leukemia, Basophilic, Acute/diagnosis
- Leukemia, Basophilic, Acute/drug therapy
- Leukemia, Basophilic, Acute/genetics
- Leukemia, Basophilic, Acute/pathology
- Multiple Organ Failure/etiology
- Proto-Oncogene Proteins c-ets/genetics
- Repressor Proteins/genetics
- Respiratory Insufficiency/etiology
- Treatment Outcome
- ETS Translocation Variant 6 Protein
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Affiliation(s)
- Athena Kritharis
- North Shore-Long Island Jewish Health System, Manhasset, NY, USA
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4
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Mikulak J, Teichberg S, Arora S, Kumar D, Yadav A, Salhan D, Pullagura S, Mathieson PW, Saleem MA, Singhal PC. DC-specific ICAM-3-grabbing nonintegrin mediates internalization of HIV-1 into human podocytes. Am J Physiol Renal Physiol 2010; 299:F664-73. [PMID: 20630938 DOI: 10.1152/ajprenal.00629.2009] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Human immunodeficiency virus (HIV)-1 has been demonstrated to contribute to the pathogenesis of HIV-associated nephropathy. In renal biopsy studies, podocytes have been reported to be infected by HIV-1. However, the mechanism involved in HIV-1 internalization into podocytes is not clear. In the present study, we evaluated the occurrence of HIV-1 internalization into conditionally immortalized human podocytes and the mechanism involved. Human podocytes rapidly internalized R5 and X4 HIV-1 primary strains via an endocytosis-dependent pathway, without establishing a productive infection. The HIV-1 internalization was dendritic cell-specific ICAM-3-grabbing nonintegrin (DC-SIGN) receptor mediated. The role of DC-SIGN was confirmed by using specific blocking antibodies and transfection with small interfering (si) RNA/DC-SIGN. Since podocyte HIV-1 trafficking was not altered by pH-modulating agents, it appeared that HIV-1 routing occurred through nonacid vesicular compartments. Interestingly, transfection of podocytes with neither siRNA/caveolin-1 nor siRNA/clathrin heavy chain inhibited podocyte viral accumulation. Thus it appears that clathrin-coated vesicles and caveosomes may not be contributing to HIV-1-associated membrane traffic.
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Affiliation(s)
- J Mikulak
- Departments of Medicine and Pathology, North Shore University Hospital and Long Island Jewish Medical Center, New Hyde Park, NY, USA
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5
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Divald A, Kivity S, Wang P, Hochhauser E, Roberts B, Teichberg S, Gomes AV, Powell SR. Myocardial Ischemic Preconditioning Preserves Postischemic Function of the 26S Proteasome Through Diminished Oxidative Damage to 19S Regulatory Particle Subunits. Circ Res 2010; 106:1829-38. [DOI: 10.1161/circresaha.110.219485] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Andras Divald
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Shaye Kivity
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Ping Wang
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Edith Hochhauser
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Beth Roberts
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Saul Teichberg
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Aldrin V. Gomes
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
| | - Saul R. Powell
- From The Feinstein Institute for Medical Research and the Albert Einstein College of Medicine (A.D., P.W., S.R.P.), Manhasset, NY; Cardiac Research Laboratory of the Department of Cardiothoracic Surgery (S.K., E.H.), Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel; Department of Laboratories and Pathology (B.R., S.T.), North Shore-Long Island Jewish Health System, Manhasset, NY; and Department of Neurobiology, Physiology and Behavior (A.V.G.), University of California,
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6
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Yadav A, Vallabu S, Arora S, Tandon P, Slahan D, Teichberg S, Singhal PC. ANG II promotes autophagy in podocytes. Am J Physiol Cell Physiol 2010; 299:C488-96. [PMID: 20484657 DOI: 10.1152/ajpcell.00424.2009] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Podocytes are an integral and important constituent of the glomerular filtration barrier (GFB) and are exposed to a higher concentrations of ANG II in diseased states; consequently, podocytes may accumulate oxidized proteins and damaged mitochondria. In the present study, we evaluated the effect of ANG II on the podocyte autophagic process, which is likely to be triggered in order to degrade unwanted proteins and damaged organelles. To quantitate the occurrence of autophagy, electron microscopic studies were carried out on control and ANG II-treated conditionally immortalized mouse podocytes (CIMPs). ANG II-treated cells showed a fivefold greater number of autophagosomes/field compared with control cells. This proautophagic effect of ANG II was inhibited by pretreatment with 3-methyladenine, an inhibitor of autophagy. ANG II also enhanced podocyte expression of autophagic genes such as LC3-2 and beclin-1. Since oxidative stress is often associated with the induction of autophagy, we examined the effect of ANG II on podocyte reactive oxygen species (ROS) generation. ANG II enhanced podocyte ROS generation in a time-dependent manner. To determine whether there is a causal relationship between ANG II-induced oxidative stress and induction of autophagy, we evaluated the effect of antioxidants on ANG II-induced autophagy. As expected, the proautophagic effect of ANG II was inhibited by antioxidants. We conclude that ANG II promotes podocyte autophagy through the generation of ROS.
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Affiliation(s)
- Anju Yadav
- Department of Medicine, North Shore and Long Island Jewish Health System and Feinstein Institute for Medical Research, Manhasset, New York, USA
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7
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Vadmal M, Kahn E, Finger P, Teichberg S. Nonteratoid Medulloepithelioma of the Retina with Electron Microscopic and Immunohistochemical Characterization. ACTA ACUST UNITED AC 2010. [DOI: 10.1080/15513819609168702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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9
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Yan XJ, Qi M, Telusma G, Yancopoulos S, Madaio M, Satoh M, Reeves WH, Teichberg S, Kohn N, Auborn K, Chiorazzi N. Indole-3-carbinol improves survival in lupus-prone mice by inducing tandem B- and T-cell differentiation blockades. Clin Immunol 2009; 131:481-94. [DOI: 10.1016/j.clim.2009.01.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 01/20/2009] [Accepted: 01/21/2009] [Indexed: 11/26/2022]
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10
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Metkar S, Awasthi S, Denamur E, Kim KS, Gangloff SC, Teichberg S, Haziot A, Silver J, Goyert SM. Role of CD14 in responses to clinical isolates of Escherichia coli: effects of K1 capsule expression. Infect Immun 2007; 75:5415-24. [PMID: 17709409 PMCID: PMC2168279 DOI: 10.1128/iai.00601-07] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Severe bacterial infections leading to sepsis or septic shock can be induced by bacteria that utilize different factors to drive pathogenicity and/or virulence, leading to disease in the host. One major factor expressed by all clinical isolates of gram-negative bacteria is lipopolysaccharide (LPS); a second factor expressed by some Escherichia coli strains is a K1 polysaccharide capsule. To determine the role of the CD14 LPS receptor in the pathogenic effects of naturally occurring E. coli, the responses of CD14-/- and CD14+/+ mice to three different isolates of E. coli obtained from sepsis patients were compared; two isolates express both smooth LPS and the K1 antigen, while the third isolate expresses only LPS and is negative for K1. An additional K1-positive isolate obtained from a newborn with meningitis and a K1-negative isogenic mutant of this strain were also used for these studies. CD14-/- mice were resistant to the lethal effects of the K1-negative isolates. This resistance was accompanied by significantly lower levels of systemic tumor necrosis factor alpha (TNF-alpha) and interleukin-6 (IL-6) in these mice than in CD14+/+ mice, enhanced clearance of the bacteria, and significantly fewer additional gross symptoms. In contrast, CD14-/- mice were as sensitive as CD14+/+ mice to the lethal effects of the K1-positive isolates, even though they had significantly lower levels of TNF-alpha and IL-6 than CD14+/+ mice. These studies show that different bacterial isolates can use distinctly different mechanisms to cause disease and suggest that new, nonantibiotic therapeutics need to be directed against multiple targets.
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Affiliation(s)
- Shalaka Metkar
- Department of Microbiology and Immunology, CUNY Medical School, and Sophie Davis School for Biomedical Sciences, City College of New York, New York, New York, USA
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11
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Hatsukari I, Singh P, Hitosugi N, Messmer D, Valderrama E, Teichberg S, Chaung W, Gross E, Schmidtmayerova H, Singhal PC. DEC-205-mediated internalization of HIV-1 results in the establishment of silent infection in renal tubular cells. J Am Soc Nephrol 2007; 18:780-7. [PMID: 17287423 DOI: 10.1681/asn.2006121307] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
HIV-1 infection of renal cells has been proposed to play a role in HIV-1-associated nephropathy. Renal biopsy data further suggest that renal tubular cells may serve as reservoir for HIV-1. The mechanism by which HIV-1 enters these cells has not been identified. Renal tubular cells do not express any of the known HIV-1 receptors, and our results confirmed lack of the expression of CD4, CCR5, CXCR4, DC-SIGN, or mannose receptors in tubular cells. The aim of this study, therefore, was to determine the mechanism that enables viral entry into renal tubular cells. An in vitro model was used to study the HIV-1 infection of human kidney tubular (HK2) cells and to identify the receptor that enables the virus to enter these cells. Results of these studies demonstrate that the C-type lectin DEC-205 acts as an HIV-1 receptor in HK2 cells. Interaction of HIV-1 with DEC-205 results in the internalization of the virus and establishment of a nonproductive infection. HIV-1-specific strong-stop DNA is detected in the infected HK2 cells for at least 7 d, and the virus can be transmitted in trans to sensitive target cells. HIV-1 entry is blocked by pretreatment with specific anti-DEC-205 antibody. Moreover, expression of DEC-205 in cells that lack the DEC-205 receptors renders them susceptible to HIV-1 infection. These findings suggest that DEC-205 acts as an HIV-1 receptor that mediates internalization of the virus into renal tubular cells, from which the virus can be rescued and disseminated by encountering immune cells.
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Affiliation(s)
- Ikusuke Hatsukari
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, Manhasset, NY 11030, USA
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12
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Abstract
OBJECTIVE Diarrhea is a common and deadly threat to millions of infants and children. Similarly, malabsorption can aggravate the health status of the chronically sick and especially the elderly. Prompt recovery from intestinal dysfunction may have a substantial impact on many populations. The aim of this study was to test the hypothesis that, in an animal model of cathartic-induce diarrhea, the previously shown proabsorptive effects of gum arabic (GA) could directly reduce and ameliorate intestinal dysfunction. METHODS Young male rats were offered a standard solid feed and as a sole source of fluid a phenolphthalein-magnesium citrate solution for 3 or 6 days (PC), or the same plus either 10 (GA1) or 20 (GA2) g/L of GA. Other groups had tap water without (CTL) or with 20 g/L GA (CTL + GA), after which the animals were jejunally perfused under anesthesia to test their absorptive capacity. Similarly treated rats were killed and the small intestinal mucosa scraped and processed for nitric oxide synthase (NOS) determination. RESULTS In 6-day studies addition of GA to the cathartic solution led to increases in net water, sodium and glucose absorption with the higher GA2, relatively to the PC rats. For water (means +/- SEM): PC = 42.4 +/- 3.6; GA2 = 57.9 +/- 3.9 nmol/g.min, p < 0.05. For sodium: PC = 2,139 +/- 334; GA2 = 4,465 +/- 444 nmol/g.min, p < 0.05. After only 3-day exposure, effects were less marked. Total NOS activity was increased in the PC, GA1 and GA2 groups (333 +/- 26; 334 +/- 27; 336 +/- 23 nmol/h.g) compared to CTL (233 +/- 27 nmol/h.g, p < 0.05), while CTL + GA showed a further reduction of activity (190 +/- 18 nmol/h.g, p < 0.05 vs. CTL). CONCLUSIONS These findings substantiate earlier physiologic and biochemical effects of GA on the gastrointestinal tract, presently conducted in a model of gastrointestinal dysfunction. The data further suggest that a natural proteoglycan such as GA can reduce secretory effects induced by cathartics and, hence, are predictive of potential effectiveness in the context of diarrhea or malabsorption by infectious or functional causes.
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Affiliation(s)
- Champa N Codipilly
- Division of Neonatal/Perinatal Medicine, Schneider Children's Hospital at North Shore, The Feinstein Institute for Medical Research, North Shore-Long Island Jewish Health System, Manhasset, NY 11030, USA
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13
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Shi Y, Stouten PFW, Pillalamarri N, Barile L, Rosal RV, Teichberg S, Bu Z, Callaway DJE. Quantitative determination of the topological propensities of amyloidogenic peptides. Biophys Chem 2005; 120:55-61. [PMID: 16288953 DOI: 10.1016/j.bpc.2005.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 09/18/2005] [Accepted: 09/18/2005] [Indexed: 11/17/2022]
Abstract
One of the interesting puzzles of amyloid beta-peptide of Alzheimer's disease (Abeta) is that it appears to polymerize into amyloid fibrils in a parallel beta sheet topology, while smaller subsets of the peptide produce anti-parallel beta sheets. In order to target potential weak points of amyloid fibrils in a rational drug design effort, it would be helpful to understand the forces that drive this change. We have designed two peptides CHQKLVFFAEDYNGKDEAFFVLKQHW and CHQKLVFFAEDYNGKHQKLVFFAEDW that join the significant amyloidogenic Abeta (14-23) sequence HQKLVFFAED in parallel and anti-parallel topologies, respectively. (Here, the word "parallel" refers only to residue sequence and not backbone topology). The N-termini of the hairpins were labeled with the fluorescent dye 5-((((2-iodoacetyl)amino)ethyl)amino)naphthalene-1-sulfonic acid (IAEDANS), forming a fluorescence energy transfer donor-acceptor pair with the C-terminus tryptophan. Circular dichroism results show that the anti-parallel hairpin adopts a beta-sheet conformation, while the parallel hairpin is disordered. Fluorescent Resonance Energy Transfer (FRET) results show that the distance between the donor and the acceptor is significantly shorter in the anti-parallel topology than in the parallel topology. The fluorescence intensity of anti-parallel hairpin also displays a linear concentration dependence, indicating that the FRET observed in the anti-parallel hairpin is from intra-molecular interactions. The results thus provide a quantitative estimate of the relative topological propensities of amyloidogenic peptides. Our FRET and CD results show that beta sheets involving the essential Abeta (14-23) fragment, strongly prefer the anti-parallel topology. Moreover, we provide a quantitative estimate of the relative preference for these two topologies. Such analysis can be repeated for larger subsets of Abeta to determine quantitatively the relative degree of preference for parallel/anti-parallel topologies in given fragments of Abeta.
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Affiliation(s)
- Yuan Shi
- Institute for Medical Research, NS/LIJ, New York University School of Medicine, 350 Community Drive, Manhasset, New York, NY 11030, USA
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14
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Li L, Teichberg S, Steckel J, Chen QH. Sarcomatoid Renal Cell Carcinoma With Divergent Sarcomatoid Growth Patterns: A Case Report and Review of the Literature. Arch Pathol Lab Med 2005; 129:1057-60. [PMID: 16048402 DOI: 10.5858/2005-129-1057-srccwd] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [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: 11/06/2022]
Abstract
Abstract
A 71-year-old woman who presented with left abdominal pain was found to have a noncalcified renal mass with a perisplenic extension on imaging studies. Histologically, the tumor showed predominantly malignant spindle cells with extensive osteoid and chondroid matrix production. Various growth patterns resembling rhabdomyosarcoma, malignant fibrous histiocytoma, and fibrosarcoma were also observed. Immunohistochemistry showed positive staining of the neoplastic cells for cytokeratin and focally positive staining for CD10 and CD117 (c-Kit). Electron microscopic examination revealed a poorly differentiated neoplasm with both mesenchymal and epithelial features. The tumor was diagnosed as a sarcomatoid renal cell carcinoma with overgrowth of the sarcomatoid component (World Health Organization: renal cell carcinoma, unclassified). To our knowledge, sarcomatoid renal cell carcinoma with such a broad morphologic phenotype in a single case has not been documented. Furthermore, the CD117 expression in a sarcomatoid renal cell carcinoma that was observed in this case merits further investigation.
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Affiliation(s)
- Lin Li
- Department of Pathology, North Shore University Hospital, North Shore-LIJ Health System, Manhasset, NY 11030, USA
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15
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Powell SR, Wang P, Divald A, Teichberg S, Haridas V, McCloskey TW, Davies KJA, Katzeff H. Aggregates of oxidized proteins (lipofuscin) induce apoptosis through proteasome inhibition and dysregulation of proapoptotic proteins. Free Radic Biol Med 2005; 38:1093-101. [PMID: 15780767 DOI: 10.1016/j.freeradbiomed.2005.01.003] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2004] [Revised: 12/14/2004] [Accepted: 01/05/2005] [Indexed: 02/07/2023]
Abstract
Cellular senescence may be accompanied by accumulation of large aggregates of oxidized proteins, also known as lipofuscin. The hypothesis that cellular accumulation of lipofuscin-like materials (LIP) results in cell death as a result of proteasome inhibition was examined. Rat neonatal cardiomyocytes were incubated with synthetic LIP for up to 48 h. This was accompanied by increases in cellular autofluorescence (207% by 48 h; p < 0.05) and electron microscopic evidence of internalization of LIP particles. LIP incubation resulted in loss of viability (-46% by 48 h; p < 0.05) through apoptotic cell death. Although 20S-proteasome activity was increased by 74% after 6 h, both 20S- and 26S-proteasome activities were decreased after 48 h of incubation (-54% (p < 0.05) and -50%, respectively), accompanied by large increases in ubiquitinated proteins. Several proteasome-regulated proapoptotic proteins, including c-Jun (2.9-fold; p < 0.05), Bax (1.8-fold; p < 0.05), and p27(kip1) (3.2-fold; p < 0.05), were observed to be increased by 48 h. Observation of ubiquitinated homologues of Bax and p27(kip1) suggested that part of the increase was due to decreased proteasomal degradation of these proteins. The results of this study are consistent with the conclusion that accumulation of LIP results in inhibition of the proteasome, which initiates an apoptotic cascade as a result of dysregulation of several proapoptotic proteins.
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Affiliation(s)
- Saul R Powell
- Department of Medicine, Long Island Jewish Medical Center Campus of the Albert Einstein College of Medicine, 270-05 76th Avenue, New Hyde Park, NY 11042, USA.
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Auborn KJ, Qi M, Yan XJ, Teichberg S, Chen D, Madaio MP, Chiorazzi N. Lifespan is prolonged in autoimmune-prone (NZB/NZW) F1 mice fed a diet supplemented with indole-3-carbinol. J Nutr 2004; 133:3610-3. [PMID: 14608082 DOI: 10.1093/jn/133.11.3610] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dietary modulation has the potential to prevent or ameliorate systemic lupus erythematosus (SLE). Indole-3-carbinol (I3C), which is abundant in cruciferous vegetables, was evaluated in a murine model of SLE because of its antiestrogenic activities. Female (NZB x NZW) F1 mice, which develop SLE, were fed an AIN76A diet without or with 0.2 g/kg I3C, starting soon after weaning or at 5 mo of age. At 12 mo of age, 80% of mice fed the I3C-supplemented diet soon after weaning were alive compared with only 10% of controls. When experimental diets were initiated at 5 mo of age, 100% of I3C fed mice and 30% of controls were alive at 12 mo of age. Anti-double-stranded DNA (dsDNA) antibodies developed in all groups, although at several time points, the levels produced in I3C-fed mice were significantly lower. Renal disease (proteinuria, histologic changes, IgG immune complex deposition, subepithelial deposits and diffuse epithelial cell foot process effacement) was more severe in controls with both protocols. The estrogen urinary metabolite ratio of 2- to 16alpha-hydroxyestrone was increased in I3C-fed mice. These findings demonstrate a profound effect of dietary I3C in experimental SLE.
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Affiliation(s)
- Karen J Auborn
- North Shore-Long Island Jewish Research Institute, Manhasset, NY 11030, USA.
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17
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Powell SR, Mantell LL, Garramone V, Drexler S, Teichberg S. Acute effects of nonlethal in utero hypoxia on fetal guinea pig heart and lack of persistent cardiac or cerebral effects in the neonate. Neonatology 2004; 86:240-6. [PMID: 15273443 DOI: 10.1159/000079933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2003] [Accepted: 05/26/2004] [Indexed: 11/19/2022]
Abstract
This study assesses the vulnerability of fetal guinea pig heart to metabolic changes during acute nonlethal in utero hypoxia. Guinea pigs (50-55 days gestation) were exposed to 7% O2 for 2 h and room air for 4 h. Fetal hearts were harvested before hypoxia, at the end of hypoxia, and 4 h after hypoxia, and analyzed for: apoptosis (TUNEL), histology, lipid peroxidation and ATP. A group of posthypoxic dams was taken to gestation. Within 48 h postpartum, the function of neonatal hearts was tested and cerebral histology examined. Fetal heart ATP was decreased by 27% at the end of hypoxia and by 32% 4 h after hypoxia. The lipid peroxides, 4-hydroxynonenal and malondialdehyde, were decreased by 37 and 46%, respectively, by 4 h after hypoxia. The apoptotic index increased from 2% in prehypoxic hearts to 8.4% by 4 h after hypoxia. Fetal heart morphology was unremarkable. Postpartum neonatal cardiac function was not affected and cerebral histology was unremarkable. These results support the conclusion that nonlethal in utero hypoxia has acute effects on the fetal heart but no persistent cardiac or cerebral effects in the postpartum neonate.
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Affiliation(s)
- Saul R Powell
- Department of Medicine, Long Island Jewish Medical Center Campus of the Albert Einstein College of Medicine, New Hyde Park, NY 11040, USA.
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18
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Tan MAL, Teichberg S, Roberts B, Hajdu SI. Ultrastructural findings in metastatic bronchioloalveolar carcinoma. Ann Clin Lab Sci 2004; 33:289-94. [PMID: 12956444] [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: 03/04/2023]
Abstract
This study was prompted by the recent revision of the definition of bronchioloalveolar carcinoma (BAC) that defines BAC, light microscopically, as a non-invasive carcinoma. Doubt has been raised whether BACs retain certain specific microscopic features after becoming invasive or metastatic. We studied 7 cases of metastatic, non-mucinous BAC by electron microscopy. Of these cases, 5 showed Clara cell granules and 1 revealed lamellar bodies. The remaining case did not show ultrastructural features of BAC. These findings suggest that most BACs retain some of their ultrastructural features after becoming metastatic neoplasms.
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Affiliation(s)
- Mary Aldrene L Tan
- Department of Pathology, North Shore University Hospital, Manhasset, New York, USA
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19
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Peng HQ, Stanek AE, Teichberg S, Shepard B, Kahn E. Malignant rhabdoid tumor of the kidney in an adult: a case report and review of the literature. Arch Pathol Lab Med 2003; 127:e371-3. [PMID: 12946214 DOI: 10.5858/2003-127-e371-mrtotk] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [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: 11/06/2022]
Abstract
Malignant rhabdoid tumor of the kidney is an uncommon renal tumor in children. The tumor has aggressive behavior and a poor prognosis and is extremely rare in adults; only 3 cases of renal rhabdoid tumors have been reported in adults. We describe here the microscopic, immunohistochemical, and electron microscopic characteristics of another case in a 38-year-old woman. This case reinforces the importance of recognizing this entity in the adult population.
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Affiliation(s)
- Hong Qi Peng
- Department of Pathology, North Shore University Hospital, New York University School of Medicine, Manhasset 11030, USA
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20
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Abstract
Muscle atrophy and wasting is a serious problem that occurs in patients with prolonged debilitating illness, burn injury, spinal injury, as well as with space flight. Current treatment for such atrophy, which often relies on nutritional supplementation and physical therapy, is of limited value in preventing the muscle wasting that occurs. Considerable recent attention has focused on the use of anabolic growth factors such as insulin-like growth factor (IGF-1) in preventing muscle atrophy during limb disuse or with various catabolic conditions. However, potential side effects such as hypoglycemia appear to be limiting factors in the usefulness of IGF-1 for clinical treatment of muscle wasting conditions. The formulation of IGF-1 used in this study (IGF-1/BP3) is already bound to its endogenous-binding protein (BP3) and, as a result, has a greater specificity of action and significantly less hypoglycemic effect. Using a rat model of hind limb suspension (HLS) for 10 days, we induced marked muscle atrophy that was accompanied by enhanced muscle proteolysis and reduced muscle protein content. When HLS rats were treated with IGF-1/BP3 (50 mg/kg, b.i.d.), they retained greater body and muscle mass. Muscle protein degradation was significantly reduced and muscle protein content was preserved. The rate of protein synthesis, although somewhat reduced in HLS muscle, was not significantly elevated by IGF-1/BP3 treatment. Volume density of HLS-treated muscles were increased compared to untreated HLS rats and the actual number of fibers per area of muscle was likewise increased. The results of the current study suggest that IGF-1/BP3 might be useful for inhibiting muscle proteolysis in catabolic conditions and thus preserving muscle protein content and mass.
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Affiliation(s)
- Martin M Zdanowicz
- Department of Pharmaceutical Sciences, Massachusetts College of Pharmacy and Health Sciences, Boston, Massachusetts 02115, USA.
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21
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Abstract
Previous experiments have shown that a soluble fiber, gum arabic (GA), enhances water, electrolyte, and glucose absorption in animal models of diarrhea. The mechanisms implicated in this effect have not been fully elucidated. This study examined the possibility that paracellular transport is modulated by luminal GA, resulting in an enhanced rate of absorption in the small intestine. This hypothesis was tested by 3-hr jejunal perfusions on anesthetized rats with solutions containing 140 mM NaCl, 5 mM KCl, and 2 microCi/liter (74 kBq) 3H2O, with either 2.5 g/liter GA [+GA] or in its absence [CTL], and one of the following agents, capable of altering paracellular transport: chenodeoxycholic acid at 0.5 mM (CDC), 2,4,6-triaminopyrimidine (TAP) at 20 mM, and protamine at 100 mg/liter (PTM). Sodium, potassium, net water, and unidirectional water movement were measured. The addition of GA increased sodium absorption in perfusions with CDC, TAP, or PTM only. Similar effects by GA on net water absorption rates were obtained in tissues permeabilized with CDC and PTM; however, GA added to TAP did not normalize the reduction caused by TAP. Although PTM did not alter net water absorption, addition of GA to perfusates with PTM enhanced absorption values above those of CTL. GA reversed the strong negative effects of CDC on potassium absorption but was ineffective in this regard with TAP and PTM. The data obtained with those reagents that affect paracellular transport and the histological evidence support the view that GA promotes net absorption by this route in the small intestine of normal rats.
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Affiliation(s)
- Khalil U Rehman
- Division of Perinatal-Neonatal Medicine, Schneider Children's Hospital at North Shore, Manhasset, New York 11030, USA
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22
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Darvishian F, Roberts B, Teichberg S, Steven HI. Ultrastructural comparison of "alveolar" and "solid" areas in bronchioloalveolar carcinoma. Ann Clin Lab Sci 2003; 32:225-30. [PMID: 12175084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The purpose of this study was to compare the ultrastructural features of bronchioloalveolar carcinomas, contrasting the well-differentiated alveolar component and the poorly-differentiated solid component in the same tumor. We studied 7 cases of non-mucinous bronchioloalveolar carcinomas by electron microscopy. Two of these cases showed lamellar bodies in both the alveolar and solid components and the remaining 5 cases revealed Clara cell granules in both components. We conclude that the neoplastic cells in bronchioloalveolar carcinoma retain their ultrastructural phenotypes after becoming invasive carcinoma with loss of alveolar differentiation.
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Affiliation(s)
- Farbod Darvishian
- Department of Pathology, North Shore University Hospital, Manhasset, New York 11030, USA
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23
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Darvishian F, Hirawat S, Teichberg S, Wolk D, Allen SL, Hajdu SI. Langerhans' cell histiocytosis in the parotid gland. Ann Clin Lab Sci 2002; 32:201-6. [PMID: 12017204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Langerhans' cell histiocytosis presenting as a parotid gland mass is extremely rare. We report a case of Langerhans' cell histiocytosis in the parotid gland that occurred in a 34-year-old Korean male. The patient underwent parotidectomy followed by adjuvant chemotherapy. There has been no evidence of local recurrence or disease progression during 20 months after the lesion was first diagnosed. Differentiation of Langerhans' cell histiocytosis from Kimura's disease was crucial in this clinical setting.
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Affiliation(s)
- Farbod Darvishian
- Department of Pathology, North Shore University Hospital, Manhasset, NY 11030, USA
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24
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Lashuel HA, Hartley DM, Balakhaneh D, Aggarwal A, Teichberg S, Callaway DJE. New class of inhibitors of amyloid-beta fibril formation. Implications for the mechanism of pathogenesis in Alzheimer's disease. J Biol Chem 2002; 277:42881-90. [PMID: 12167652 DOI: 10.1074/jbc.m206593200] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.5] [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: 11/06/2022] Open
Abstract
The amyloid hypothesis suggests that the process of amyloid-beta protein (Abeta) fibrillogenesis is responsible for triggering a cascade of physiological events that contribute directly to the initiation and progression of Alzheimer's disease. Consequently, preventing this process might provide a viable therapeutic strategy for slowing and/or preventing the progression of this devastating disease. A promising strategy to achieve prevention of this disease is to discover compounds that inhibit Abeta polymerization and deposition. Herein, we describe a new class of small molecules that inhibit Abeta aggregation, which is based on the chemical structure of apomorphine. These molecules were found to interfere with Abeta1-40 fibrillization as determined by transmission electron microscopy, Thioflavin T fluorescence and velocity sedimentation analytical ultracentrifugation studies. Using electron microscopy, time-dependent studies demonstrate that apomorphine and its derivatives promote the oligomerization of Abeta but inhibit its fibrillization. Preliminary structural activity studies demonstrate that the 10,11-dihydroxy substitutions of the D-ring of apomorphine are required for the inhibitory effectiveness of these aporphines, and methylation of these hydroxyl groups reduces their inhibitory potency. The ability of these small molecules to inhibit Abeta amyloid fibril formation appears to be linked to their tendency to undergo rapid autoxidation, suggesting that autoxidation product(s) acts directly or indirectly on Abeta and inhibits its fibrillization. The inhibitory properties of the compounds presented suggest a new class of small molecules that could serve as a scaffold for the design of more efficient inhibitors of Abeta amyloidogenesis in vivo.
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Affiliation(s)
- Hilal A Lashuel
- Center for Neurologic Diseases, Brigham and Women's Hospital and Department of Neurology, Harvard Medical School, Cambridge, Massachusetts 02139, USA.
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25
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Abstract
We report the case of a 74-year-old white man with a mass in the head of the pancreas, which was found incidentally on computerized tomographic scan during a workup for deep vein thrombosis. Endoscopy with pancreatic duct brushings yielded a diagnosis of adenocarcinoma. A pancreaticoduodenectomy followed, with complete resection of the tumor. Pathologic examination showed 2 distinct components. One component was a conventional infiltrating pancreatic ductal adenocarcinoma, and the other component was high-grade sarcoma with features of malignant fibrous histiocytoma. To our knowledge, this carcinosarcoma is the seventh reported case of a primary pancreatic neoplasm with mixed carcinomatous and sarcomatous elements.
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Affiliation(s)
- Farbod Darvishian
- Department of Pathology, North Shore University Hospital, Manhasset, NY 11030, USA.
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26
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Abstract
We report the case of a 74-year-old white man with a mass in the head of the pancreas, which was found incidentally on computerized tomographic scan during a workup for deep vein thrombosis. Endoscopy with pancreatic duct brushings yielded a diagnosis of adenocarcinoma. A pancreaticoduodenectomy followed, with complete resection of the tumor. Pathologic examination showed 2 distinct components. One component was a conventional infiltrating pancreatic ductal adenocarcinoma, and the other component was high-grade sarcoma with features of malignant fibrous histiocytoma. To our knowledge, this carcinosarcoma is the seventh reported case of a primary pancreatic neoplasm with mixed carcinomatous and sarcomatous elements.
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Affiliation(s)
- Farbod Darvishian
- Department of Pathology, North Shore University Hospital, Manhasset, NY 11030, USA.
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27
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Abstract
Intestinal secretion is a normal phenomenon, indispensible to solubilize and dilute nutrients and to maintain fluidity in the intestinal lumen. Enterotoxins and certain drugs may disrupt the proabsorptive status maintained by the small intestine under physiologic conditions. Hormones found in nervous and specialized intestinal enterochromaffin cells are responsible, in part, for secretion of fluid into the lumen. Afferent vagal nerve impulses mediated by 5-hydroxytryptamine (serotonin; 5-HT), vasoactive intestinal peptide (VIP) and substance P are the major agents of secretory stimulation. Toxins from pathogenic bacteria, especially some strains of E. coli and V. cholerae, trigger a secretory response and a chain of events involving cGMP and cAMP which result in chloride secretion, coupled to sodium and fluid efflux into the lumen. If secretion is unchecked by natural mechanisms or medications, the consequences are diarrhea, with potential dehydration, hyponatremia and ultimately death. Introduction of absorbable nutrients in the intestinal lumen has a major antisecretory action, both by a nutrient-gene interaction and by proabsorptive hormone expression. In additon, during the absorptive process water is carried into the enterocyte together with solutes. Hydrolysis-resistant peptides of dietary origin and ingested soluble fiber may also have a proabsorptive effect. The gastrointestinal system has a variety of antisecretory or proabsorptive hormonal and protein agonists that balance the outflow of fluid and electrolytes. The more extensively studied are neuropeptide Y/peptide YY (NPY/PYY) and the antisecretory factor (AF). Nitric oxide (NO), a short-lived second messenger, has a major role in secretion by activating cGMP. The intracellular concentration of NO may regulate the absorptive/secretory status of the small intestine, either stimulating absorption or inducing secretion. Specifically targeted 5-HT receptor antagonist drugs and other pharmacologic agents have been clinically tried for the treatment of severe diarrhea, drug-induced malabsorption and reversal of cellular damage.
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Affiliation(s)
- Raul A. Wapnir
- Department of Pediatrics, North Shore-Long Island Jewish Health System and Research Institute, New York University School of Medicine, 11030, Manhasset, New York, USA
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28
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Altaf W, Perveen S, Rehman KU, Teichberg S, Vancurova I, Harper RG, Wapnir RA. Zinc supplementation in oral rehydration solutions: experimental assessment and mechanisms of action. J Am Coll Nutr 2002; 21:26-32. [PMID: 11838884 DOI: 10.1080/07315724.2002.10719190] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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: 12/15/2022]
Abstract
BACKGROUND Zinc deficiency is associated with chronic diarrhea. This condition is generally linked to an overproduction of nitric oxide (NO), which induces secretion and cellular damage as a free radical. Use of oral rehydration solutions (ORS) is an important part of diarrhea treatment, especially early in infancy and for patients with cholera. The presence of zinc in an ORS could be a positive factor in recovery from diarrheal disease. OBJECTIVE This study was undertaken to determine whether zinc added to an ORS could regulate the synthesis of NO metabolites in the lumen of zinc deficient rat intestine, acting as a gastrointestinal protector and thus accelerating normalization of intestinal function and zinc status. METHODS The effects of zinc on NO metabolism were studied in young male rats fed a zinc deficient diet for three weeks to mimic the condition of patients with recurrent diarrheal episodes. During the fourth week of the zinc deficient feedings, experimental diarrhea was induced using cathartics (magnesium citrate plus phenolphthalein) that exacerbate NO production. A standard ORS with or without 1 mM zinc was given to the rats for the last two days. A control group received a zinc sufficient diet. Rats were killed at each stage. Intestinal nitric oxide synthase (NOS) was assayed, cecal fluid contents were analyzed for nitrates and nitrites, intestinal histology was examined, and activation of nuclear factor NF-kappaB DNA binding activity was determined. RESULTS Rats fed the zinc-deficient diet for three weeks gained less weight than rats fed a normal zinc content diet and had a lower plasma zinc than controls (51.6 +/- 5.4 [n = 101 vs. 143.6 +/- 7.2 microg/dL [n = 11], p < 0.05). Recovery with ORS+Zn resulted in a higher plasma zinc than with the ORS-Zn (ORS+Zn: 186.5 +/- 12.2; ORS-Zn: 57.5 +/- 6.6 microg/dL, p < 0.05). The zinc-deficient diet did not alter mucosal NOS, as compared to the values of rats fed a normal diet. However, those animals which received five days of cathartic fluids had a small intestinal NOS higher than that of all other groups. Either ORS+Zn or ORS-Zn normalized NOS activity, regardless of cathartic treatment. The rats fed the zinc deficient diet had generally a higher content of NO metabolites in the cecum than rats fed a normal diet. After recovery with either type of ORS, rats given the cathartic remained with higher cecal NO metabolite concentrations than rats that had no induced diarrhea. After recovery with ORS+Zn, intestinal villi showed significant expansion of the lamina propria, an indication of greater absorption of fluid, while with ORS-Zn this was not present. Small intestinal homogenates of rats recovering with ORS+Zn had a decreased NF-kappaB DNA binding activity than tissues from rats consuming ORS-Zn. CONCLUSIONS The results are consistent with the hypothesis that addition of Zn to an ORS may contribute to improving the physiologic status of the small intestine and potentially reduce the risks of recurrent diarrhea episodes.
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Affiliation(s)
- Waseem Altaf
- Department of Pediatrics, Division of Neonatal/Perinatal Medicine, North Shore-Long Island Jewish Health System, Manhasset, New York 11030, USA
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29
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Shan J, Yuan L, Xiao Q, Chiorazzi N, Budman D, Teichberg S, Xu HP. TSP50, a possible protease in human testes, is activated in breast cancer epithelial cells. Cancer Res 2002; 62:290-4. [PMID: 11782390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Initial studies have identified TSP50 as a human testes-specific gene that is demethylated in breast cancer. In this study, we will present new data related to the TSP50 gene. We have found that the TSP50 gene product shares a similar enzymatic structure with many serine proteases. However, the most critical catalytic site, serine, has been replaced by threonine. Western analysis revealed that in human testes, the TSP50 antibody detected two closely positioned protein bands whose estimated molecular masses were 37 kDa, whereas in a large portion of breast cancer tissues, but not normal control tissues, only one band was present. Immunohistochemistry assays found TSP50 proteins located in the spermatocytes of human testes, whereas in situ hybridization and immunohistochemistry confirmed that gene activation in breast tumors took place in malignant mammary epithelial cells. These results suggested that the normal function of the TSP50 gene was involved in spermatogenesis, whereas the up-regulation of TSP50 in many breast cancer patients not only indicated that it might be a novel biomarker for this disease but also encouraged us to further explore the possibility of whether it was an oncogene.
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Affiliation(s)
- Jidong Shan
- Department of Molecular Oncology, North Shore-Long Island Jewish Research Institute, New York University School of Medicine, Manhasset, New York 11030, USA
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Abstract
Adenocarcinoma of the lung with pleural involvement frequently resembles pleural epithelioid mesothelioma clinically as well as macro- and microscopically. Special stains, immunohistochemical studies, and electron microscopic studies are needed to differentiate these 2 tumors. We report a case of pleural involvement by adenocarcinoma, mimicking in the hematoxylin-eosin stain an epithelioid mesothelioma, correctly identified only after immunohistochemical and electron microscopic examinations.
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Affiliation(s)
- P Tang
- Department of Pathology, North Shore University Hospital-New York University School of Medicine, Manhasset, NY 11030, USA
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31
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Tang P, Teichberg S, Roberts B, Hajdu SI. Ultrastructure of the periductal area of comedo carcinoma in situ of the breast. Ann Clin Lab Sci 2001; 31:284-90. [PMID: 11508833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
We have previously shown that the different biological natures of comedo ductal carcinoma in situ (DCIS) and non-comedo DCIS may, in part, be explained by the different expression patterns of tenascin, a large extracellular matrix protein, as observed by immunohistochemical studies. In the present study, we compared 8 cases of comedo DCIS with 5 cases of non-comedo DCIS by ultrastructural analysis, focusing on the myoepithelium, basal lamina, and tenascin-positive extracellular periductal stromal matrix. Our observations show that the comedo type DCIS frequently has an altered basal lamina, a looser and more disorganized collagenous matrix, and a general increase in stromal cellularity, including fibroblasts, lymphocytes, histiocytes and small blood vessels. In addition, in comedo DCIS, the lateral intercellular spaces between large myoepithelial cells that border the basal lamina are often expanded, compared to those of non-comedo DCIS. These results identify structural characteristics of comedo DCIS that may play a role in its greater preinvasive potential. They may also provide a structural basis for the different strategies that are needed for for clinical management of comedo DCIS, compared to non-comedo DCIS.
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Affiliation(s)
- P Tang
- Department of Pathology, North Shore University Hospital, Manhasset, NY 11030, USA
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32
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Abstract
In experimental models of gastroenterological disease, the soluble fiber gum arabic (GA) acts as a proabsorptive adjuvant. This study investigated which specific transport pathway(s) are affected by GA. Rat jejunum was perfused under anesthesia with a standardized oral rehydration solution (ORS) containing D-glucose, with or without GA (2.5 g/liter). In some preparations either phloridizin, a competitive inhibitor of Na+-coupled D-glucose transport, or phloretin, an inhibitor of basolateral glucose transport, were added to the ORS, with or without GA. Diffusion and paracellular transport changes due to GA were evaluated with L-glucose and [14C]polyethlyene glycol 4000 (PEG). GA partially reversed water, Na+, and D-glucose absorption inhibition induced by phloridzin and normalized water and Na+ absorption in the presence of phloretin. GA also increased absorption of water, Na+, and PEG from an L-glucose ORS. The data suggest that GA does not act via Na+ dependent mechanism(s), but stimulates transcellular and/or transjunctional transport pathways; therefore GA may be useful to increase absorption of solutes transported by diffusion.
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Affiliation(s)
- M A Wingertzahn
- Department of Pediatrics, North Shore-Long Island Jewish Health System--New York University School of Medicine, Manhasset 11030, USA
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33
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Darvishian F, Teichberg S, Meyersfield S, Urmacher CD. Concurrent malakoplakia and papillary urothelial carcinoma of the urinary bladder. Ann Clin Lab Sci 2001; 31:147-50. [PMID: 11337903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
A case of malakoplakia and papillary urothelial carcinoma of the urinary bladder is reported. In this case, malakoplakia was an incidental finding in a biopsy of the urinary bladder of a 74-yr old female, who presented with hematuria. The biopsy showed a low-grade papillary urothelial carcinoma in close association with malakoplakia. This is a rare association of these lesions.
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Affiliation(s)
- F Darvishian
- Department of Pathology, North Shore University Hospital, 300 Community Drive, Manhasset, NY 11030, USA.
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34
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Basham KL, Hajdu SI, Teichberg S, Menzin A. Adenocarcinoid tumor of the ovary diagnosed during pregnancy. A case report. J Reprod Med 2000; 45:758-61. [PMID: 11027087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
BACKGROUND Adenocarcinoid tumors are uncommon neoplasms with dual morphology, showing components of a neuroendocrine tumor with carcinoid features and an adenocarcinomatous component composed of glands lined with mucin-containing cells, some of which are goblet type. CASE A 36-year-old woman had a left adnexal mass found during the second week of pregnancy. Sonography showed it to be increasing in size and eventually to become associated with pelvic pain. During the 20th week of gestation, an exploratory laparotomy was performed, and the left ovary and fallopian tube were excised. A diagnosis of adenocarcinoma was rendered by intraoperative frozen section. A staging procedure was then performed that included removal of the contralateral adenexa, pelvic lymph node sampling, peritoneal biopsies and partial omentectomy. The vermiform appendix and gastrointestinal tract appeared unremarkable. The patient was discharged. Permanent sections of the left ovary revealed an adenocarcinoid tumor. CONCLUSION While reports detail ovarian metastases of adenocarcinoid neoplasms from primary appendiceal and other gastrointestinal sites, this case, in the setting of a normal appendix and negative workup for an extraovarian origin, is the fourth documented one of a primary ovarian adenocarcinoid tumor and first diagnosed during pregnancy.
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Affiliation(s)
- K L Basham
- Division of Surgical Pathology, North Shore University Hospital, Manhasset, New York 11030, USA
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35
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Abstract
Gum arabic (GA), a soluble fiber with emulsifying properties, enhances intestinal water and electrolyte absorption in normal and secreting rats. Our aim was to assess the effect of GA, 2.5 and 5.0 g/liter, on cholera toxin-induced water and electrolyte secretion in rat jejunum in vivo. After a 2-hr exposure to cholera toxin, jejunal segments of adult rats were perfused in vivo with at plasma electrolyte solution containing GA, 0, 2.5 or 5.0 g/liter. 24Na was used as a marker of sodium influx. Cholera toxin-induced secretion was reduced by GA, 2.5 and 5.0 g/liter. 24Na secretion into the lumen was reduced by GA. GA caused a morphological expansion of intercellular spaces in the villi but not crypts. In conclusion, GA promotes lumen to blood intestinal transport of water and sodium despite cholera toxin activation. These observations support a potential role for GA in enhancing the efficacy of ORS.
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Affiliation(s)
- J L Turvill
- Digestive Diseases Research Centre, St. Bartholomew's & The Royal London School of Medicine & Dentistry, UK
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36
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Abstract
Glucose absorption from the small intestine is largely mediated via the sodium-coupled glucose transporter (SGLT1). The goal of this study was to investigate the ontogenesis of the SGLT1, using the rat as an animal model at three stages of development: during lactation, at weaning, and at physiologic maturity. The techniques involved upper small intestinal perfusions with solutions containing 200 mM glucose and 50 mM NaCl, with or without 1 mM phloridzin (Phl), as an inhibitor of SGLT1. Molecular expression of the SGLT1 was also investigated via Western blot analysis from intestinal specimens of the three growth periods. Glucose absorption in weanling rats, in the absence of Phl, was several times higher than in sucklings and approximately double that of mature animals, and the effects of Phl were the greatest in weanlings. Furthermore, the physiologic data correlate to the molecular analysis of the SGLT1 which showed an increase in expression of the SGLT1 in both the weanlings and the adults compared to the sucklings. At all three stages of development Phl abolished Na absorption, and in sucklings there was a net outflow of Na. Due to the coupling between Na and water transport, net water absorption and the influx/efflux ratio, a more sensitive indicator of changes in unidirectional fluid movement, were similarly affected by Phl at the three stages of development. Net water absorption was highest in weanling animals. These findings are consistent with an early development of SGLT1 in rat small intestine and an apparent burst of activity at weaning. Less than complete maturity of other absorptive mechansims is occurring at this time.
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Affiliation(s)
- J M Khan
- Division of Perinatal Medicine, New York University School of Medicine, Manhasset, New York 11030, USA
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37
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Abstract
Intracellular proteases play an important role in the regulation of apoptosis. A study was performed to determine whether inhibition of the cardiac ATP-dependent ubiquitin 26S protease complex affects cardiomyocyte apoptosis. Isolated rat hearts were perfused for up to 80 min with Krebs-Henseleit buffer +/- the 26S-proteasome inhibitor, MG132 (Z-leu-leu-leucinal). TUNEL-staining of hearts perfused with 25 microM MG132 for 50 min revealed a significant increase (p < 0.05) in the apoptotic index from 1.1% to 15.5% when compared with control hearts perfused with buffer only. Histology of adjacent myocardial sections revealed no signs of necrotic or late apoptotic (nuclear condensation) changes, indicating that the TUNEL-positive nuclei were in the early stages of apoptosis. This early stage of apoptosis was associated with a significant (p < 0.05) reduction in cardiac function. There was a 63% decrease in the rate pressure product in hearts perfused with 25 microM MG132 as compared with a 35% decrease in control hearts over the 80-min perfusion period. Soluble ubiquitin-conjugated proteins, as detected by probing with a specific antibody to ubiquitin, were increased in MG132-treated hearts. In hearts perfused with 50 microM MG132, a greater accumulation of ubiquinated proteins was observed accompanied by a more rapid and greater reduction in hemodynamic function. These observations indicate that prolonged inhibition of the ubiquitin-26S-proteasome results in cardiomyocyte apoptosis accompanied by increased ubiquinated proteins, thus suggesting that accumulation of these abnormal proteins may act as a signal to activate the cell death program.
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Affiliation(s)
- S R Powell
- Department of Obstetrics and Gynecology, Winthrop University Hospital, Mineola, New York 11501, USA.
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38
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Abstract
BACKGROUND It has been shown that gum arabic, a soluble fiber, enhances water, electrolyte, and glucose absorption from oral rehydration solutions in jejunal perfusion of healthy rats and in animals with theophylline-induced secretion or chronic osmotic-secretory diarrhea. This report concerns a study of the effectiveness of an oral rehydration solution supplemented with gum arabic, during recovery from chronic osmotic secretory diarrhea in free-living rats. METHODS Chronic diarrhea was induced in 60- to 80-g juvenile rats by providing a magnesium citrate-phenolphthalein solution as the sole fluid source for 7 days. This led to diarrhea characterized by dehydration, soft stools, increased cecal volume, decreased food and fluid intake and failure to gain weight. After 7 days of diarrhea, rats recovered for 24 hours with either tap water or an oral rehydration solution (90 mM Na, 111 mM glucose, 20 mM K, 80 mM chloride, 20 mM citrate) with or without 2.5 g/l gum arabic. RESULTS Although all three solutions improved the diarrhea, optimal recovery from diarrhea was achieved with the gum arabic-supplemented oral rehydration solution. After 4 hours and 24 hours, rats drinking the gum arabic-supplemented solution gained more weight and had lower fecal output than rats receiving water or the rehydration solution without gum arabic. All three solutions normalized plasma osmolality after 24 hours. CONCLUSIONS The positive effects of the gum arabic-supplemented rehydration solution on fluid and electrolyte absorption seen during jejunal perfusion also occurred during recovery from chronic osmotic secretory diarrhea, when free-living animals drank the solution ad libitum.
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Affiliation(s)
- S Teichberg
- Department of Pediatrics, North Shore University Hospital, New York University School of Medicine, Manhasset, USA
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39
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Gong JZ, Sullivan JD, Teichberg S, Hajdu SI. Pleomorphic large cell sarcoma of the spleen with rhabdomyosarcomatous differentiation. Ann Clin Lab Sci 1999; 29:303-7. [PMID: 10528830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
An unusual case is reported of pleomorphic large cell sarcoma of the spleen with rhabdomyosarcomatous differentiation in a 34-year old male. According to our knowledge, such a neoplasm has never been reported in the literature.
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Affiliation(s)
- J Z Gong
- Department of Pathology, North Shore University Hospital, Manhasset, New York 11030, USA
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40
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Mason JM, Guzowski DE, Goodwin LO, Porti D, Cronin KC, Teichberg S, Pergolizzi RG. Human serum-resistant retroviral vector particles from galactosyl (alpha1-3) galactosyl containing nonprimate cell lines. Gene Ther 1999; 6:1397-405. [PMID: 10467364 DOI: 10.1038/sj.gt.3300963] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/09/2022]
Abstract
Retroviral vector particles (RVP) which are resistant to inactivation by human serum will be needed for many in vivo gene therapy applications. Murine-based producer cell lines generate RVP which are inactivated by human serum, reportedly due to the presence of the galactosyl (alpha1-3) galactosyl carbohydrate moiety (alphaGal) on these and other nonprimate producer cells and RVP. Consequently, human cells (which lack the alphaGal moiety) have been developed as producer cell lines for generation of human serum-resistant RVP. In this study, we report that contrary to earlier reports, the presence of the alphaGal moiety on producer cells and RVP does not necessarily correlate with cell killing or RVP inactivation by human serum. We show that the alphaGal-positive ferret brain cell line, Mpf, is an excellent basal cell line for generation of RVP which have titers and serum resistance levels equal to or greater than RVP produced in human cell lines such as HT1080. Therefore, packaging cell lines need not be limited to those of human or primate origin for production of human serum-resistant RVP.
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Affiliation(s)
- J M Mason
- Viral Vector Laboratory, Department of Research, North Shore University Hospital-New York University School of Medicine, Manhasset, NY 11030, USA
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41
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Abstract
Rice gruels have been used as home remedies to treat dehydration associated with diarrheal illness in developing countries. These preparations have produced conflicting results, most likely due to the heterogeneity of starch used. We investigated whether the modified tapioca starch, Textra (TX), at 5.0 or 10.0 g/L added to a 90 mmol/L Na+-111 mmol glucose oral rehydration solution (ORS) enhanced water and electrolyte absorption in two models of diarrhea. To induce a secretory state (model A), the jejunum of juvenile rats was perfused with 10 mmol/L theophylline (THEO) under anesthesia and then perfused with the solutions indicated above. To produce chronic osmotic-secretory diarrhea (model B), rats had a magnesium citrate-phenolphthalein solution as the sole fluid source for 1 wk, and then were perfused as the THEO-treated rats. Water, electrolyte, and glucose absorption were measured during both perfusions. As an extension of the perfusion studies, we compared how fast rats recovered from chronic osmotic diarrhea by offering them either water, ORS, or ORS containing 5.0 g/L TX along with solid food. Recovery rate markers were measured after 24 h and included weight gain, food and fluid intake, and stool output. In model A, addition of 5.0 g/L TX to ORS reversed Na+ secretion and improved net water as well as K+ and glucose absorption, compared with THEO-treated rats perfused with ORS without TX. In model B, addition of TX to ORS increased water, Na+, K+, and glucose absorption, compared with rats perfused without TX. Increasing TX from 5.0 to 10.0 g/L had no additional benefit. In recovery experiments, animals with free access to ORS with TX had significantly greater weight gain and decreased stool output compared with animals recovering with water or ORS without TX. Our experiments suggest that TX may be a useful additive to standard ORS to promote fluid and electrolyte absorption and may provide additional energy without increasing ORS osmotic load.
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Affiliation(s)
- M A Wingertzahn
- Department of Pediatrics, North Shore University Hospital, New York University School of Medicine, Manhasset 11030, USA
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42
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Allen LA, Wingertzahn MA, Teichberg S, Wapnir RA. Proabsorptive effect of glycerol as a glucose substitute in oral rehydration solutions. J Nutr Biochem 1999; 10:49-55. [PMID: 15539250 DOI: 10.1016/s0955-2863(98)00082-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/1988] [Accepted: 09/10/1998] [Indexed: 11/15/2022]
Abstract
We hypothesized that glycerol, a readily diffusable hydrophilic substance, may effectively substitute for glucose and enhance intestinal water and sodium absorption in an oral rehydration solution (ORS). This was evaluated using a low osmolality (230-240 mOsm/kg) ORS containing 75 mmol/L sodium and a combination of glucose:glycerol (in mmol/L) 75:0, 50:25; 37.5:37.5, 25:50, 10:65, or 0:75 during 3-hour long in vivo rat jejunal perfusions. Water, sodium, potassium, glucose and glycerol absorption, and unidirectional fluid movement (J(in), J(eff)) were determined. Sodium and net water absorptions were maximal at glucose:glycerol ratios between 37.5:37.5 and 10:65 mmol/L. In the absence of glucose (0:75), absorption of water and electrolytes was lower than at any other concentration. The greater net rehydration seemed to be due to a higher J(in) as glycerol was increased up to 65 mmol/L. Potassium absorption followed a similar pattern. With 50 mmol/L glycerol and 25 mmol/L glucose, there was a marked expansion of the lamina propria extracellular space and increased intercellular expansion between enterocytes. These results indicate that glycerol may be an effective partial substitute for glucose in ready-to-use ORS by producing an improved rate of water and electrolyte absorption.
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Affiliation(s)
- L A Allen
- Department of Pediatrics, North Shore University Hospital, New York University School of Medicine, Manhasset, NY 11030, USA
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43
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Lipson SM, Match ME, Shepp DH, Lotlikar MS, Teichberg S, Pergolizzi R. Identification of an exogenous retrovirus (foamy virus type 1) in rhesus monkey kidney cell culture: significance to viral diagnostics. J Clin Virol 1998; 11:149-53. [PMID: 9785216 DOI: 10.1016/s1386-6532(98)00051-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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44
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Abstract
BACKGROUND Partially hydrolyzed starches from staple cereals, obtained by heat or by enzymatic treatment, are often used in the formulation of homemade or extemporaneously used oral rehydration solutions used in developing countries. Conflicting or anecdotal results obtained thus far could be clarified with a standardized preparation tested under well-controlled laboratory conditions. METHODS A modified commercial tapioca starch was tested. Textra (National Starch and Chemical Co. Bridgewater, NJ, U.S.A.) added at 0, 5 or 10 g/l to an oral rehydration solution with 90 mM sodium and 111 mM glucose, in 30 rats malnourished by a protein-deficient diet for 3 weeks and in 26 well-fed control animals, using a one-pass jejunal perfusion. RESULTS In protein-deficient rats, Textra stimulated sodium absorption at 5 and 10 g/l (mean +/- SEM); 0 g/l Textra: 160 +/- 13 nmol/min x cm; 5 g/l Textra: 406 +/- 31 (p < 0.0001); and 10 g/l Textra 230 +/- 27 (p < 0.02). Potassium absorption was comparably increased. Textra also improved net water absorption and the water influx:efflux ratio. Glucose absorption was increased only at 10 g/l Textra. In control rats, Textra improved sodium and net water absorption at 5 g/l, but not at 10 g/l Textra; but the influx:efflux ratio and potassium absorption were unaltered. CONCLUSIONS These data, obtained in normal and protein-deficient rats, support the view that modified starch is a potentially useful, energy-rich additive for oral rehydration solution, which does not introduce an osmotic penalty.
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Affiliation(s)
- R A Wapnir
- Department of Pediatrics and Laboratories, North Shore University Hospital-New York University School of Medicine, Manhasset 11030, USA
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45
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Abstract
Juxtaoral organs known as organs of Chievitz are intramuscular embryonic structures found close to the angle of the mandible near the insertion of the pterygomandibular raphae. They are considered of neuroepithelial origin with no known function. We describe the first tumor of the organ of Chievitz which presented intraorally in a child. Immunohistochemically, the Chievitz nests showed positive reaction for vimentin, cytokeratins, and epithelial membrane antigen and ultrastructurally demonstrated cytoplasmic processes and intermediate filament bundles. These observations, together with light microscopic features, suggest that the epithelial nests of the organ of Chievitz are meningothelial rather than neuroepithelial.
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Affiliation(s)
- M S Vadmal
- Department of Laboratories, North Shore University Hospital, Manhasset, NY 11030, USA
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46
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Sun T, Susin M, Brody J, Tack K, Marsh J, Teichberg S, Koduru P, Schwartz P. T-cell lymphoma associated with natural killer-like T-cell reaction. Am J Hematol 1998; 57:331-7. [PMID: 9544979 DOI: 10.1002/(sici)1096-8652(199804)57:4<331::aid-ajh11>3.0.co;2-b] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We report a case of T-cell lymphoma showing in the peripheral blood (PB) exclusively T-lymphocytes with suppresser T-cell preponderance and a high percentage of natural killer (NK) marker positive cells by flow cytometry. A T-cell receptor (TCR) gene analysis of the PB leukocytes demonstrated rearrangements of TCRalpha, TCRbeta, and TCRgamma genes. Therefore, the phenotype and genotype appeared to be consistent with an NK-like T-cell leukemia/lymphoma. However, when the PB lymphocytes were separated by size, it was found that 80% of NK marker positive cells were in the smaller cell population, while the neoplastic cells were in the large cell gate. A diagnosis of T-cell lymphoma with reactive NK-like T-cells was finally confirmed by demonstrating the presence of both large atypical lymphoid cells and large granular lymphocytes (LGL) on PB smears. Although immunoperoxidase stain of bone marrow and colon showed positive T-cell markers in the tumor cell population, cytoplasmic granules could not be identified in tissue sections and, thus, a distinction between T-cell lymphoma and NK-like T-cell lymphoma could not be made by light microscopy until NK markers were studied. CD57 was demonstrated immunohistochemically in small lymphocytes but not in the large tumor cells in the colon. Electron microscopy, however, demonstrated LGL reaction to the lymphoma cells in the colonic biopsy. NK-like T-cell lymphoma usually carries a poorer prognosis than peripheral T-cell lymphoma, thus the distinction of these neoplasms is important. This study emphasizes that T-cell lymphoma may cause an LGL reaction or proliferation. If the lymphoma cells were of the same size as LGL, flow cytometric studies may have misled the diagnosis to NK-like T-cell-lymphoma.
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Affiliation(s)
- T Sun
- VA Medical Center, Department of Pathology, University of Colorado School of Medicine, Denver 80220, USA.
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47
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Kapurniotu A, Bernhagen J, Greenfield N, Al-Abed Y, Teichberg S, Frank RW, Voelter W, Bucala R. Contribution of advanced glycosylation to the amyloidogenicity of islet amyloid polypeptide. Eur J Biochem 1998; 251:208-16. [PMID: 9492286 DOI: 10.1046/j.1432-1327.1998.2510208.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The formation of amyloid within the islets of Langerhans is associated with the development of type II diabetes mellitus and occurs by the aggregation and insolubilization of islet amyloid polypeptide (IAPP). Recent in vitro studies suggest that amyloid formation follows a nucleation-dependent polymerization mechanism, i.e. aggregation is initiated by pre-formed aggregates or nucleation seeds. Modification of the Alzheimer's disease amyloid peptide by advanced glycosylation end products (AGEs), which form spontaneously by the non-enzymatic addition of glucose to protein amino groups, has been shown to enhance peptide aggregation in vitro. To explore the possibility that AGEs contribute to islet amyloid formation, we prepared AGE-modified IAPP (AGE-IAPP) in vitro and studied its properties by biochemical and biophysical techniques. AGE modification induced the formation of high-molecular-mass IAPP aggregates and amyloid formation was demonstrated by Congo red green-gold birefringence and by the presence of a characteristic fibrillar structure by electron microscopy. AGE-IAPP also showed an increase in cytotoxicity toward the astroglioma cell line HTB14. When added to soluble IAPP, AGE-IAPP seeds accelerated IAPP aggregation and abolished the nucleation period required for the polymerization of unseeded IAPP. Circular dichroism spectropolarimetry indicated that AGE-IAPP seeds may act as a template to stabilize the beta-sheet conformation of IAPP, thereby promoting its aggregation. Our studies demonstrate that AGE modification of IAPP results in high-molecular mass, fibrillar amyloid structures that nucleate IAPP amyloid formation and suggest a model for intra-islet amyloid deposition that may occur by the progressive advanced glycosylation of IAPP in vivo.
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Affiliation(s)
- A Kapurniotu
- Abteilung für Physikalische Biochemie, Physiologisch-chemisches Institut der Universität Tübingen, Germany
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48
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Powell SR, Nelson RL, Finnerty J, Alexander D, Pottanat G, Kooker K, Schiff RJ, Moyse J, Teichberg S, Tortolani AJ. Zinc-bis-histidinate preserves cardiac function in a porcine model of cardioplegic arrest. Ann Thorac Surg 1997; 64:73-80. [PMID: 9236338 DOI: 10.1016/s0003-4975(97)00300-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND We examined the ability of zinc-bis-histidinate to preserve postarrest myocardial function when added to a standard crystalloid cardioplegic solution. METHODS Domestic pigs (35 to 50 kg) on left-sided cardiopulmonary bypass were subjected to 90 minutes of regional ischemia followed by 60 minutes of hypothermic cardioplegic arrest induced by antegrade infusion of 20 mL/kg cold St. Thomas' #2 cardioplegic solution with or without 100 mumol/L of zinc-bis-histidinate and maintained by infusion of 10 mL/kg of the same every 20 minutes. During reperfusion function was assessed at 1 and 3 hours over increasing preloads using the right-sided bypass method. RESULTS At roller pump flows up to 2,000 mL/min, stroke work index-end-diastolic pressure curves were significantly (p < 0.05) higher and shifted to the left in treated hearts. In a series of pigs, echocardiography was used to determine end-diastolic and end-systolic volumes. At roller pump flows up to 3,500 mL/min, end-systolic pressure-end-systolic volume curves were significantly higher and shifted to the left in treated hearts. Left ventricular ejection fraction, fractional shortening, stroke volume, and cardiac output were significantly (p < 0.05) higher in treated hearts. Electron microscopy revealed that mitochondria in tissue not at risk appeared more swollen in control hearts. CONCLUSIONS The results of this study support the conclusion that zinc-bis-histidinate is effective as a myocardial preservative when added to a crystalloid cardioplegic solution.
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Affiliation(s)
- S R Powell
- Department of Surgery, North Shore University Hospital, Manhasset, New York 11030, USA
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49
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Wapnir RA, Wingertzahn MA, Teichberg S. Cellulose derivatives and intestinal absorption of water and electrolytes: potential role in oral rehydration solutions. Proc Soc Exp Biol Med 1997; 215:275-80. [PMID: 9207864 DOI: 10.3181/00379727-215-44139] [Citation(s) in RCA: 7] [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: 02/04/2023]
Abstract
The physicochemical and structural characteristics of several types of carboxymethylcellulose (CMC) and of methylcellulose (MC) were examined in relation to their capacity to modify water and sodium absorption in oral rehydration solutions (ORS) at various concentrations, using a jejunal perfusion procedure in rats. Comparison of intrinsic low-viscosity CMC of various degrees of substitution (DS) revealed that net water absorption increased as the DS was augmented. A stimulatory effect on sodium absorption occurred only at a low (2.5 g/l) CMC concentration. With products of medium DS, stimulation of net water and sodium absorption was observed only with low-viscosity CMC at 2.5 g/l, but not at 5.0 g/l. In perfusions with CMC of medium and high DS there was a reduction of water and sodium absorption, ultimately resulting in net sodium secretion with 5.0 g/l high-DS CMC. MC perfused at 5.0 or 10.0 g/l reduced net water absorption and reversed sodium transport from absorptive to secretory status. These results show that while low-viscosity-grade, low-DS CMC in low concentrations may facilitate solute uptake and concurrent water absorption from ORS by the jejunum, high intrinsic viscosity and possible chemical interaction of solutes with the modified celluloses tend to block water uptake and produce fluid stasis and electrolyte secretion. Thus, the data suggest that only certain types of CMC may be proabsorptive when added to ORS, while high-viscosity and high-DS CMC or MC induce electrolyte malabsorption and eventual catharsis.
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Affiliation(s)
- R A Wapnir
- Department of Pediatrics, North Shore University Hospital-New York University School of Medicine, Manhasset 11030, USA
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50
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Zdanowicz MM, Teichberg S, O'Connor M, Moyse J, Slonim AE. Metabolic and structural effects of insulin-like growth factor-I and high-protein diet on dystrophic hamster skeletal muscle. Proc Soc Exp Biol Med 1997; 215:168-73. [PMID: 9160044 DOI: 10.3181/00379727-215-44124] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In muscular dystrophy (MD) there is an imbalance between muscle protein synthesis and protein degradation, which results in a net muscle catabolism, along with muscle wasting and weakness. Using a dystrophic hamster model (BIO 53.58), we examined the chronic (8 weeks) effects of two factors that may enhance muscle protein synthesis and inhibit protein degradation, namely, insulin-like growth factor-I (rhIGF-I) and high-protein diet (HPD). Protein synthesis was determined by measuring the incorporation of 14C phenylalanine into perfused leg muscle, while protein degradation was calculated from the release of tyrosine from the same perfused muscle. Urinary 3-methylhistidine excretion was used as an indicator of myofibrillar degradation. Treatment of dystrophic hamsters with rhIGF-I, HPD, or a combination of the two for 8 weeks resulted in significant decreases in total and myofibrillar degradation when compared with untreated dystrophic animals (P < 0.05) but had minimal effects on protein synthesis. Significant morphologic improvements (P < 0.05), including a normalization and greater uniformity of muscle fibers, were also seen in rhIGF-I- and rhIGF-I + HPD-treated animals. rhIGF-I and HPD were effective in reducing the excessive proteolysis seen in dystrophic muscle, and this reduced proteolysis resulted in improvement of muscle morphology.
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Affiliation(s)
- M M Zdanowicz
- Department of Pharmacology, Massachusetts College of Pharmacy & Allied Health Sciences, Boston 02115, USA
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