26
|
Vries KD, Eibschitz I, Tessler B, Shapiro I, Degani S, Levitan Z, Sharf M. The role of the gynecologist in cases of sexual assault in adolescents. Int J Adolesc Med Health 2011; 1:337-342. [PMID: 22912011 DOI: 10.1515/ijamh.1985.1.3-4.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
|
27
|
Sackmann S, Lichtenauer U, Shapiro I, Reincke M, Beuschlein F. Aldosterone producing adrenal adenomas are characterized by activation of calcium/calmodulin-dependent protein kinase (CaMK) dependent pathways. Horm Metab Res 2011; 43:106-11. [PMID: 21249615 DOI: 10.1055/s-0030-1269899] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Primary aldosteronism is the most prevalent cause of secondary hypertension. However, insights in pathophysiological mechanisms resulting in autonomous aldosterone secretion are limited. Although transcriptional regulators of aldosterone synthase (CYP11B2) including calcium-binding calmodulin kinase (CaMK) dependent pathways have been defined in vitro, it remains uncertain whether these mechanisms play a role in the context of dysregulated steroidogenesis in aldosterone producing adrenadenomas. Thus, we compared expression and activation of key components of CaMK pathways in aldosterone producing adenomas (APAs) with normal adrenals glands (NAGs). As expected, aldosterone synthase expression in APAs was significantly higher in comparison to NAGs, suggesting transcriptional activation as a contributing factor of aldosterone excess. Along the same line, CaMKI was significantly upregulated in APAs on the mRNA and protein level. Furthermore, immunohistochemistry revealed nuclear localization of CaMKI in these tumors. The phosphorylation of CREB, a target protein for CaMKI was increased, which could represent a further stimulation of aldosterone synthase transcription. In summary, this study provides indirect evidence for a causative involvement of the CaM kinase signaling pathway in human aldosterone producing adenomas.
Collapse
|
28
|
Zimmer EZ, Peretz BA, Shapiro I, Groisman G. Transient ascites in a fetus with Fraser syndrome. J OBSTET GYNAECOL 2009. [DOI: 10.3109/01443618609112289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
29
|
Degani S, Tamir A, Leibovitz Z, Shapiro I, Gonen R, Ohel G. Three-dimensional power Doppler in the evaluation of painful leiomyomas and focal uterine thickening in pregnancy. Int J Gynaecol Obstet 2007; 99:122-6. [PMID: 17888922 DOI: 10.1016/j.ijgo.2007.04.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 04/26/2007] [Accepted: 04/27/2007] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To determine the usefulness of 3-dimensional (3D) power Doppler ultrasound in distinguishing painful leiomyomas from focal myometrial contractions or nonpainful leiomyomas in pregnancy. METHODS A 2D section of the area of interest in the uterine wall was first obtained in 29 patients to determine whether the pain originated from a myoma or a uterine contraction. Then, volume acquisition was activated and Doppler indices (vascularization index, flow index, and vascularization-flow index) were calculated for thickened and normal uterine wall. RESULTS Of 15 patients found to have uterine myomas, 11 had multiple tumors and 4 had single tumors. In the remaining 14 patients the painful uterine thickening proved to be a focal contraction. Painful segments of uterine thickening were associated with lower Doppler indices. Painful myomas were found to have significantly lower indices than normal uterine wall (P=0.008, 0.03, and 0.01 for VI, FI, and VFI, respectively, vs. 0.001, 0.003, and 0.01). However, the differences in indices between nonpainful myomas and uterine wall on the one hand, and nonpainful myomas and focal uterine contractions on the other, were not statistically significant. CONCLUSION Three-dimensional power Doppler ultrasound may be a sensitive and reliable tool for distinguishing painful uterine myomas from focal myometrial contractions and nonpainful myomas.
Collapse
|
30
|
Lichtenauer U, Shapiro I, Geiger K, Rückauer KD, Beuschlein F. Identification and characterization of the adrenal tumor side population. Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-972452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
31
|
Sackmann S, Lichtenauer U, Geyer M, Shapiro I, Spady L, Donauer J, Beuschlein F. Smoc1, Mtus1 and Gpr48 are regulated in potassium dependent aldosterone secretion. Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-972252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
32
|
Kalisky B, Gitterman M, Shapiro BY, Shapiro I, Shaulov A, Tamegai T, Yeshurun Y. Spatiotemporal vortex matter oscillations in Bi2Sr2CaCu2O8+delta crystals. PHYSICAL REVIEW LETTERS 2007; 98:017001. [PMID: 17358499 DOI: 10.1103/physrevlett.98.017001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2006] [Indexed: 05/14/2023]
Abstract
We observed an oscillatory behavior, both in space and time, of the induction in Bi2Sr2CaCu2O8+delta crystals exposed to a steady magnetic field. This new "flux waves" phenomenon appears near the order-disorder vortex phase transition, under specific conditions of temperature and induction gradient. A theoretical description of this effect is based on two coupled equations: the Landau-Khalatnikov dynamic equation for the order parameter of the vortex phase transition and the diffusion equation for the time evolution of the magnetic induction. A linear stability analysis of these equations predicts an oscillatory instability characterized by a period and wavelength in accordance with the experimental results.
Collapse
|
33
|
Yagel S, Cohen SM, Shapiro I, Valsky DV. 3D and 4D ultrasound in fetal cardiac scanning: a new look at the fetal heart. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2007; 29:81-95. [PMID: 17200988 DOI: 10.1002/uog.3912] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Over the last decade we have been witness to a burgeoning literature on three-dimensional (3D) and four-dimensional (4D) ultrasound-based studies of the fetal cardiovascular system. Recent advances in the technology of 3D/4D ultrasound systems allow almost real-time 3D/4D fetal heart scans. It appears that 3D/4D ultrasound in fetal echocardiography may make a significant contribution to interdisciplinary management team consultation, health delivery systems, parental counseling, and professional training. Our aim is to review the state of the art in 3D/4D fetal echocardiography through the literature and index cases of normal and anomalous fetal hearts.
Collapse
|
34
|
Dvir E, Friedman JE, Lee JY, Koh JY, Younis F, Raz S, Shapiro I, Hoffman A, Dahan A, Rosenberg G, Angel I, Kozak A, Duvdevani R. A Novel Phospholipid Derivative of Indomethacin, DP-155 [Mixture of 1-Steroyl and 1-Palmitoyl-2-{6-[1-(p-chlorobenzoyl)-5-methoxy-2-methyl-3-indolyl acetamido]hexanoyl}-sn-glycero-3-phosophatidyl Choline], Shows Superior Safety and Similar Efficacy in Reducing Brain Amyloid β in an Alzheimer's Disease Model. J Pharmacol Exp Ther 2006; 318:1248-56. [PMID: 16763096 DOI: 10.1124/jpet.106.103184] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Indomethacin has been suggested for the treatment of Alzheimer's disease (AD), but its use is limited by gastrointestinal and renal toxicity. To overcome this limitation, D-Pharm Ltd. (Rehovot, Israel) developed DP-155 (mixture of 1-steroyl and 1-palmitoyl-2-{6-[1-(p-chlorobenzoyl)-5-methoxy-2-methyl-3-indolyl acetamido] hexanoyl}-Sn-glycero-3-phosophatidyl [corrected] choline), a lecithin derivative of indomethacin. Safety was tested by daily oral administration of DP-155 or indomethacin to rats in a dose range of 0.007 to 0.28 mmol/kg. The prevalence of gastrointestinal ulceration was significantly lower (10-fold) for DP-155 than for indomethacin, and the ulcerations were delayed. Signs of renal toxicity, namely reduced urine output and increased urine N-acetyl glycosaminidase to creatinine ratio, were 5-fold lower for DP-155. Indomethacin, but not an equimolar dose of DP-155, reduced urine bicyclo-prostaglandin E(2). An equimolar oral dose of DP-155 or indomethacin, administered every 4 h for 3 days, was equally efficacious in reducing the levels of Abeta42 in the brains of Tg2576 mice. Indomethacin was the principal metabolite of DP-155 in the serum. After DP-155 oral administration, indomethacin's half-life in the serum and the brain was 22 and 93 h, respectively, compared with 10 and 24 h following indomethacin oral administration. The brain to serum ratio was 3.5 times higher for DP-155 than indomethacin. This finding explains the efficacy of DP-155 in reducing Abeta42 brain levels, despite the low systemic blood concentrations of indomethacin derived from DP-155. In conclusion, compared with indomethacin, DP-155 has significantly lower toxicity in the gut and kidney while maintaining similar efficacy to indomethacin in lowering Abeta42 in the brains of Tg2576 mice. This superior safety profile highlights DP-155's potential as an improved indomethacin-based therapy for AD.
Collapse
|
35
|
Draviam VM, Shapiro I, Aldridge B, Sorger PK. Misorientation and reduced stretching of aligned sister kinetochores promote chromosome missegregation in EB1- or APC-depleted cells. EMBO J 2006; 25:2814-27. [PMID: 16763565 PMCID: PMC1500857 DOI: 10.1038/sj.emboj.7601168] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Accepted: 05/04/2006] [Indexed: 12/13/2022] Open
Abstract
The correct formation of stable but dynamic links between chromosomes and spindle microtubules (MTs) is essential for accurate chromosome segregation. However, the molecular mechanisms by which kinetochores bind MTs and checkpoints monitor this binding remain poorly understood. In this paper, we analyze the functions of six kinetochore-bound MT-associated proteins (kMAPs) using RNAi, live-cell microscopy and quantitative image analysis. We find that RNAi-mediated depletion of two kMAPs, the adenomatous polyposis coli protein (APC) and its binding partner, EB1, are unusual in affecting the movement and orientation of paired sister chromatids at the metaphase plate without perturbing kinetochore-MT attachment per se. Quantitative analysis shows that misorientation phenotypes in metaphase are uniform across chromatid pairs even though chromosomal loss (CIN) during anaphase is sporadic. However, errors in kinetochore function generated by APC or EB1 depletion are detected poorly if at all by the spindle checkpoint, even though they cause chromosome missegregation. We propose that impaired EB1 or APC function generates lesions invisible to the spindle checkpoint and thereby promotes low levels of CIN expected to fuel aneuploidy and possibly tumorigenesis.
Collapse
|
36
|
Beuschlein F, Heshkovitz L, Klammer S, Shapiro I, Krup M, Weinstein Y. The adrenal X-zone is involved in progesterone inactivation. Exp Clin Endocrinol Diabetes 2006. [DOI: 10.1055/s-2006-932847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
37
|
Johnsen I, Hahner S, Fassnacht M, Bertherat J, Shapiro I, Reincke M, Allolio B, Beuschlein F. Evaluation of a standardized protocol for the collection and storage of adrenal tumor samples – preparation for an international adrenal tumor bank. Exp Clin Endocrinol Diabetes 2006. [DOI: 10.1055/s-2006-933062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
38
|
Golesorkhi N, Greaney P, DiMatteo C, Fischer L, Tulenko T, Shapiro I, Carabasi A, Lombardi J, Larson R, DiMuzio P. A tissue-engineered, small diameter vascular graft. J Surg Res 2006. [DOI: 10.1016/j.jss.2005.11.308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
39
|
Onak T, Landesman H, Williams R, Shapiro I. The B11 Nuclear Magnetic Resonance Chemical Shifts and Spin Coupling Values for Various Compounds. ACTA ACUST UNITED AC 2005. [DOI: 10.1021/j150579a601] [Citation(s) in RCA: 217] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
40
|
Klammer S, Schulte D, Fassnacht M, Hahner S, Pulichino AM, Shapiro I, Reincke M, Allolio B, Drouin J, Beuschlein F. Adrenal phenotype in TPIT insufficient animals cannot be restored by short-term treatment with physiological doses of ACTH and N-POMC. Exp Clin Endocrinol Diabetes 2005. [DOI: 10.1055/s-2005-862809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
41
|
Betz MJ, Shapiro I, Fassnacht M, Hahner S, Reincke M, Beuschlein F. Peroxisome proliferator activated receptor gamma (PPARγ) agonists suppress adrenocortical tumor cell proliferation and induce differentiation. Exp Clin Endocrinol Diabetes 2005. [DOI: 10.1055/s-2005-862814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
42
|
|
43
|
Beuschlein F, Shapiro I, Hammer GD, Reincke M. Gonadectomized mice of the inbred strain CE/J develop adrenocortical tumors derived from subcapsular cells expressing x-zone marker. Exp Clin Endocrinol Diabetes 2004. [DOI: 10.1055/s-2004-819297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
44
|
Gröger A, Böhm A, Beyer U, Shapiro BY, Shapiro I, Wyder P. Ring-shaped vortex domain in type-II superconductors. PHYSICAL REVIEW LETTERS 2003; 90:237004. [PMID: 12857283 DOI: 10.1103/physrevlett.90.237004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2002] [Revised: 03/03/2003] [Indexed: 05/24/2023]
Abstract
We present results of experiments in superconducting niobium and numerical simulations showing the creation of a metastable ring-shaped vortex domain by heating. Such vortex rings, if pinned by structural defects, can exist forever.
Collapse
|
45
|
Suyama K, Shapiro I, Guttman M, Hazan RB. A signaling pathway leading to metastasis is controlled by N-cadherin and the FGF receptor. Cancer Cell 2002; 2:301-14. [PMID: 12398894 DOI: 10.1016/s1535-6108(02)00150-2] [Citation(s) in RCA: 375] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The intracellular signaling events causing tumor cells to become metastatic are not well understood. N-cadherin and FGF-2 synergistically increase migration, invasion, and secretion of extracellular proteases in breast tumor cells. Here, we define a metastatic signaling cascade activated by N-cadherin and FGF-2. In the presence of N-cadherin, FGF-2 caused sustained activation of the MAPK-ERK pathway, leading to MMP-9 gene transcription and cellular invasion. N-cadherin prevented the FGF receptor (FGFR) from undergoing ligand-induced internalization, resulting in increased FGFR-1 stability. Association of FGFR-1 with N-cadherin was mediated by the first two Ig-like domains of FGFR-1. These results suggest that protection of the FGFR-1 from ligand-induced downregulation by N-cadherin enhances receptor signaling and provides a mechanism by which tumor cells can acquire metastatic properties.
Collapse
|
46
|
Williams RE, Gibbins SG, Shapiro I. N.m.r. Spectra of B4H10: Correlation of Boron Hydride Spectra. J Am Chem Soc 2002. [DOI: 10.1021/ja01532a015] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
47
|
|
48
|
Shapiro I, Weiss HG, Schmich M, Skolnik S, Smith GBL. Preparation of Diborane by the Lithium Aluminum Hydride—Boron Trifluoride Reaction1. J Am Chem Soc 2002. [DOI: 10.1021/ja01124a012] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
49
|
|
50
|
|