1
|
Abramson Z, Schechter A. Case 320: Intrathyroidal Thymic Tissue. Radiology 2023; 309:e222365. [PMID: 38112545 DOI: 10.1148/radiol.222365] [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: 12/21/2023]
Abstract
HISTORY A 7-year-old boy with a history of pleuropulmonary blastoma after resection 6 years prior and germline DICER1 mutation was being monitored by physicians at a multidisciplinary genetic predisposition clinic. He demonstrated no evidence of recurrent pleuropulmonary blastoma, and his renal US, chest radiographic, and ocular screening examination results remained normal. Per age-directed screening guidelines, he underwent thyroid US. He had no signs or symptoms of hyper- or hypothyroidism. Physical examination was notable for the absence of thyromegaly or palpable nodule. US at 12-month follow-up showed no change in size or appearance of the left lobe (not shown). However, at this time, the Thyroid Imaging Reporting and Data System (TI-RADS) classification scheme was applied to the stable left lobe finding. The findings were discussed at a multidisciplinary thyroid nodule conference, and the decision was made to bring the patient back for a short-term follow-up for limited unenhanced MRI without sedation. A diagnosis was made based on the follow-up imaging findings.
Collapse
Affiliation(s)
- Zachary Abramson
- From the Department of Diagnostic Imaging, St Jude Children's Research Hospital, 262 Danny Thomas Pl, Memphis, TN 38105
| | - Ann Schechter
- From the Department of Diagnostic Imaging, St Jude Children's Research Hospital, 262 Danny Thomas Pl, Memphis, TN 38105
| |
Collapse
|
2
|
Abstract
HISTORY A 7-year-old boy with a history of pleuropulmonary blastoma after resection 6 years prior and germline DICER1 mutation was being monitored by physicians at a multidisciplinary genetic predisposition clinic. He demonstrated no evidence of recurrent pleuropulmonary blastoma, and his renal US, chest radiographic, and ocular screening examination results remained normal. Per age-directed screening guidelines, he underwent thyroid US (Figs 1-3). He had no signs or symptoms of hyper- or hypothyroidism. Physical examination was notable for the absence of thyromegaly or palpable nodule. US at 12-month follow-up showed no change in size or appearance of the left lobe (not shown). However, at this time, the Thyroid Imaging Reporting and Data System (TI-RADS) classification scheme was applied to the stable left lobe finding. The findings were discussed at a multidisciplinary thyroid nodule conference, and the decision was made to bring the patient back for a short-term follow-up for limited unenhanced MRI without sedation (Fig 4). A diagnosis was made based on the follow-up imaging findings.
Collapse
Affiliation(s)
- Zachary Abramson
- From the Department of Diagnostic Imaging, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105
| | - Ann Schechter
- From the Department of Diagnostic Imaging, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105
| |
Collapse
|
3
|
Srinivasan A, Parikh A, Pace E, Schechter A, Tang E, Servaes S. Imaging of pediatric abdominal soft tissue tumors: A COG Diagnostic Imaging Committee/SPR Oncology Committee White Paper. Pediatr Blood Cancer 2023; 70 Suppl 4:e30341. [PMID: 37073573 PMCID: PMC10660723 DOI: 10.1002/pbc.30341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 04/20/2023]
Abstract
This paper provides imaging recommendations for pediatric abdominal tumors that arise outside of the solid viscera. These tumors are rare in children and have been categorized in two groups: abdominal wall and peritoneal tumors (desmoid tumor and desmoplastic small round cell tumor) and tumors that arise from the gastrointestinal tract (gastrointestinal stromal tumor and gastrointestinal neuroendocrine tumor). Authors offer consensus recommendations for imaging assessment of these tumors at diagnosis, during follow-up, and when off-therapy.
Collapse
Affiliation(s)
- Abhay Srinivasan
- Department of Radiology, Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ashishkumar Parikh
- Department of Radiology, Emory University Children’s Healthcare of Atlanta, Georgia, USA
| | - Erika Pace
- Department of Radiology, The Royal Marsden NHS Foundation Trust, London, UK
| | - Ann Schechter
- Department of Diagnostic Imaging, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
| | - Elizabeth Tang
- Department of Radiology, Children’s Hospital Colorado, University of Colorado School of Medicine, Denver, Colorado, USA
| | - Sabah Servaes
- Department of Radiology, WVU Medicine Children’s Hospital, West Virginia University, Morgantown, West Virginia, USA
| |
Collapse
|
4
|
Acord MR, Pace E, El-Ali A, Chaturvedi A, Iyer RS, Navarro OM, Pandit-Taskar N, K Parikh A, Schechter A, Shaikh R, McCarville MB. Imaging of pediatric extremity soft tissue tumors: A COG Diagnostic Imaging Committee/SPR Oncology Committee White Paper. Pediatr Blood Cancer 2023; 70 Suppl 4:e29944. [PMID: 36070194 PMCID: PMC10641877 DOI: 10.1002/pbc.29944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/08/2022] [Indexed: 11/05/2022]
Abstract
Pediatric soft tissue tumors of the extremity include rhabdomyosarcoma and nonrhabdomyosarcoma neoplasms. This manuscript provides consensus-based imaging recommendations for imaging evaluation at diagnosis, during treatment, and following completion of therapy for patients with a soft tissue tumor of the extremity.
Collapse
Affiliation(s)
- Michael Richard Acord
- Department of Radiology, The Children's Hospital of Philadelphia, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Erika Pace
- Cancer Research UK Cancer Imaging Centre, Division of Radiation Therapy and Imaging, The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Alexander El-Ali
- Division of Pediatric Radiology, Department of Radiology, NYU Grossman School of Medicine, New York, New York, USA
| | - Apeksha Chaturvedi
- Department of Imaging Science, University of Rochester Medical Center, Rochester, New York, USA
| | - Ramesh S Iyer
- Department of Radiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Oscar M Navarro
- Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Neeta Pandit-Taskar
- Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Ashishkumar K Parikh
- Department of Radiology, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Ann Schechter
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Raja Shaikh
- Division of Interventional Radiology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - M Beth McCarville
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| |
Collapse
|
5
|
Eisen A, Schechter A, Itzhaki Ben Zadok O, Harari E, Shlomo N, Iakobishvili Z, Kornowski R, Zusman O. P3607Temporal trends in the characteristics, management, and clinical outcomes of patients with prior myocardial infarction who are admitted with an acute coronary syndrome. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Patients with prior myocardial infarction (MI) are at increased risk for recurrent cardiovascular events. Advances in treatment in the last decade has improved prognosis of patients with acute coronary syndrome (ACS), yet it is not known whether similar trends exist in patients with prior MI who are admitted with an ACS, a particularly high-risk group.
Methods
Patients admitted with ACS who were enrolled in the ACS Israeli Surveys (ACSIS). Patients were stratified by early (2000–2008) and late (2010–2016) time-periods and by prior MI status. Clinical outcomes included 30-d MACE (death, MI, stroke, unstable angina, stent thrombosis, urgent revascularization) and 1-year mortality.
Results
A total of 15,211 ACS patients were included, of whom 4627 (30%) had a prior MI. These patients were older (67y vs. 63y), more commonly male, had more prior comorbidities, and a higher proportion had a GRACE score>140 (38.4% vs 12.2%). Patients with prior MI received more prior medications such as aspirin, statins, antihypertensives and hypoglycemics. During time, utilization of guideline-recommended therapies such as P2Y12 inhibitors, statins, and PCI had significantly improved in patients with prior MI. However, compared with patients without prior MI, they were still treated less commonly by PCI (61% vs. 74%). Overall, patients with prior MI had a higher 30-d MACE (13.7% vs 17.2%, p<0.001) and 1-year mortality (8.2% vs. 13.1%, p<0.001). In patients with prior MI, during time, 30d MACE nearly halved (22.7% to 11.8%) and 1-year mortality also decreased (15.5% to 10.7%). Upon adjustment, prior MI was independently associated with 1-year mortality (HR 1.13, 95% CI 1.01–1.26, p=0.04) and the late time-period was associated with reduced 1-year mortality (HR 0.75, 95% CI 0.65–0.84, p<0.001).
Conclusion
Patients with prior MI have a worse prognosis after ACS despite being treated with prior medications and improvement in guideline-based therapies. Although still undertreated, their clinical outcome has significantly improved throughout the years.
Collapse
Affiliation(s)
- A Eisen
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - A Schechter
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | | | - E Harari
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - N Shlomo
- Chaim Sheba Medical Center, Tel Hashomer, Israel
| | - Z Iakobishvili
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - R Kornowski
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - O Zusman
- Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| |
Collapse
|
6
|
Nunley J, Sutton J, Culp W, Wilson D, Coleman K, Demianiuk R, Schechter A, Moore G, Donovan T, Schwartz P. Primary pulmonary neoplasia in cats: assessment of computed tomography findings and survival. J Small Anim Pract 2015; 56:651-6. [DOI: 10.1111/jsap.12401] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 07/29/2015] [Accepted: 07/29/2015] [Indexed: 12/11/2022]
Affiliation(s)
- J. Nunley
- Animal Medical Center; New York NY 10065 USA
| | - J. Sutton
- University of California-Davis; Davis CA 95616 USA
| | - W. Culp
- University of California-Davis; Davis CA 95616 USA
| | - D. Wilson
- University of California-Davis; Davis CA 95616 USA
| | - K. Coleman
- Colorado State University; Fort Collins CO 80523 USA
| | - R. Demianiuk
- Michigan State University; East Lansing MI 48824 USA
| | - A. Schechter
- Michigan State University; East Lansing MI 48824 USA
| | - G. Moore
- Purdue University; West Lafayette IN 47907 USA
| | - T. Donovan
- Animal Medical Center; New York NY 10065 USA
| | - P. Schwartz
- Animal Medical Center; New York NY 10065 USA
| |
Collapse
|
7
|
Friman H, Schechter A, Nitzan Y, Cahan R. Effect of external voltage on Pseudomonas putida F1 in a bio electrochemical cell using toluene as sole carbon and energy source. Microbiology (Reading) 2014; 160:828. [PMID: 24677363 DOI: 10.1099/mic.0.078170-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
8
|
Aurbach D, Schechter A, Markovsky B, Cohen Y, Weissman I, Moshkovich M. Recent Studies of Interfacial Phenomena which Determine the Electrochemical Behavior of Lithium and Lithiated Carbon Anodes with the Emphasis on In Situ Techniques. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-496-587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThis paper reports on some new results on the application of surface sensitive techniques for the study of the correlation of surface chemistry, morphology and electrochemical behavior of lithium and lithiated graphite as anodes for rechargeable batteries. Surface sensitive FTIR spectroscopy, atomic force microscopy (AFM), electrochemical quartz crystal microbalance (EQCM) were applied to Li and Li-graphite electrodes in a variety of electrolyte solutions of interest, in conjunction with standard electrochemical techniques. The similarity in the surface chemistry developed on Li and lithiated graphite in solutions is demonstrated and discussed. We demonstrate the strong impact of the surface chemistry on the morphology of Li deposition-dissolution processes, and the use of in situ EQCM measurements for the choice of optimal electrolyte solutions for rechargeable batteries with Li metal anodes.
Collapse
|
9
|
Aurbach D, Lu Z, Schechter A, Gofer Y, Gizbar H, Turgeman R, Cohen Y, Moshkovich M, Levi E. Prototype systems for rechargeable magnesium batteries. Nature 2000; 407:724-7. [PMID: 11048714 DOI: 10.1038/35037553] [Citation(s) in RCA: 802] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The thermodynamic properties of magnesium make it a natural choice for use as an anode material in rechargeable batteries, because it may provide a considerably higher energy density than the commonly used lead-acid and nickel-cadmium systems. Moreover, in contrast to lead and cadmium, magnesium is inexpensive, environmentally friendly and safe to handle. But the development of Mg batteries has been hindered by two problems. First, owing to the chemical activity of Mg, only solutions that neither donate nor accept protons are suitable as electrolytes; but most of these solutions allow the growth of passivating surface films, which inhibit any electrochemical reaction. Second, the choice of cathode materials has been limited by the difficulty of intercalating Mg ions in many hosts. Following previous studies of the electrochemistry of Mg electrodes in various non-aqueous solutions, and of a variety of intercalation electrodes, we have now developed rechargeable Mg battery systems that show promise for applications. The systems comprise electrolyte solutions based on Mg organohaloaluminate salts, and Mg(x)Mo3S4 cathodes, into which Mg ions can be intercalated reversibly, and with relatively fast kinetics. We expect that further improvements in the energy density will make these batteries a viable alternative to existing systems.
Collapse
Affiliation(s)
- D Aurbach
- Department of Chemistry, Bar-Ilan University, Ramat Gan, Israel.
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Lu Z, Schechter A, Moshkovich M, Aurbach D. On the electrochemical behavior of magnesium electrodes in polar aprotic electrolyte solutions. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00146-1] [Citation(s) in RCA: 390] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
11
|
Fleischmajer R, Perlish JS, MacDonald ED, Schechter A, Murdoch AD, Iozzo RV, Yamada Y. There is binding of collagen IV to beta 1 integrin during early skin basement membrane assembly. Ann N Y Acad Sci 1998; 857:212-27. [PMID: 9917843 DOI: 10.1111/j.1749-6632.1998.tb10118.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [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: 11/29/2022]
Abstract
This study is concerned with the mechanism of basement membrane assembly in an in vitro 3-dimensional skin-culture system. Dermal fibroblasts alone can synthesize collagen IV, perlecan, and nidogen, but cannot assemble them into a basement membrane. When keratinocytes are added to the culture, however, linear assembly of collagen IV, perlecan, and nidogen is noted at the epidermo-dermal interface. Northern blots and in situ hybridization showed that perlecan and nidogen mRNAs derive exclusively from fibroblasts, while the alpha 2 (IV) collagen chain is expressed by both keratinocytes and fibroblasts, although the major source is in the mesenchyma (80%). Prior to the development of the lamina densa, collagen IV colocalizes with beta 1 integrins, most likely alpha 1 beta 1 and alpha 2 beta 1, which are known receptors for this collagen. Blocking experiments with the AIIB2 mAb (anti-beta 1 integrin subunit) and by peptide inhibition with the CB3(IV) collagen fragment disrupted the assembly of collagen IV. This study suggests that the initiation of basement-membrane formation involves binding of collagen IV molecules to keratinocyte cell-matrix integrins. These complexes act as nucleation sites for further polymerization of collagen IV molecules mostly derived from fibroblasts, by a process of self-assembly.
Collapse
Affiliation(s)
- R Fleischmajer
- Department of Dermatology, Mount Sinai School of Medicine, New York, New York 10029, USA.
| | | | | | | | | | | | | |
Collapse
|
12
|
|
13
|
Fleischmajer R, Schechter A, Bruns M, Perlish JS, Macdonald ED, Pan TC, Timpl R, Chu ML. Skin fibroblasts are the only source of nidogen during early basal lamina formation in vitro. J Invest Dermatol 1995; 105:597-601. [PMID: 7561165 DOI: 10.1111/1523-1747.ep12323604] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The purpose of this study was to determine whether nidogen, the linkage protein of the basal lamina, is of epidermal or dermal origin. The development of the basal lamina was studied in an in vitro skin model. Preputial fibroblasts seeded onto a nylon mesh attached, proliferated, and developed a rich extracellular matrix (dermal model). Preputial keratinocytes were added to the dermal model to form a keratinocyte dermal model that ultrastructurally resembled in many respects human skin. Ultrastructural analysis revealed early stages of dermal development, including an incomplete basal lamina, aggregates of dermal filamentous material connecting to the lamina densa, bundles of 10-nm microfibrils, formation of premature hemidesmosomes, anchoring filaments, and anchoring fibrils. The cell origin of nidogen was determined in the dermal model and in the epidermal and dermal components of the keratinocyte dermal model. Specific antibodies and a cDNA probe for nidogen were used for immunofluorescence microscopy, Western and Northern blots, and for in situ hybridization studies. Our data show that fibroblasts are the only source of nidogen during early basal lamina formation. Although fibroblasts can synthesize nidogen and deposit it in the dermal matrix, no basal lamina will form unless they are recombined with keratinocytes. This suggests that the epidermis plays a major regulatory role in the production and assembly of nidogen into the basal lamina.
Collapse
Affiliation(s)
- R Fleischmajer
- Department of Dermatology, Mount Sinai School of Medicine, New York, New York 10029, USA
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Abstract
A 7 1/2-yr-old girl suffered, since early infancy, severe recurrent myalgia during periodic attacks of fever, vomiting and pharyngitis. Neither myoglobinuria nor exercise-induced muscle pain was present. She was found to have carnitine palmitoyltransferase deficiency (CPTD) in leukocytes, fibroblasts and muscle. This case exemplifies the importance of looking for an associated metabolic etiology of recurrent febrile myalgia even in the absence of myoglobinuria.
Collapse
Affiliation(s)
- R Schiffmann
- Pediatric Neurology Unit, Hadassah University Hospital, Mount Scopus, Jerusalem, Israel
| | | | | |
Collapse
|
15
|
Abstract
Our laboratory has demonstrated the cataractogenic potential of UV radiation and several photosensitizing drugs in laboratory animals and in humans. We have utilized lens fluorescence measurements (which we have demonstrated to be a reliable marker for pre-cataractous and early cataractous changes), NMR pulse relaxation techniques, and our recently developed magnetic resonance imaging method to measure lens T2 values in the normal and UV exposed Degus lens (in vivo and in vitro) to detect pre-cataractous changes in the lens. These approaches will permit us to employ two parameters (increased non-tryptophan fluorescence and a decrease in T2 values) to monitor for such changes months before the lens opacities become manifest by conventional slit lamp examinations.
Collapse
Affiliation(s)
- S Lerman
- Eye Research Laboratory, New York Medical College, Valhalla 10595
| | | | | | | | | |
Collapse
|
16
|
Abstract
Progress in biophysical technology now permits us to monitor aging and precataractous changes in the human ocular lens in vivo as well as in vitro. We are employing two noninvasive techniques to measure changes in lens fluorescence and in one lens water compartment (T2) utilizing Scheimpflug lens fluorescence densitography and magnetic resonance imaging. These studies demonstrate age-related changes in the normal lens as reflected by enhanced fluorescence and longer T2 values. Precataractous changes can also be detected with this approach.
Collapse
Affiliation(s)
- S Lerman
- Department of Ophthalmology, New York Medical College, Valhalla 10595
| | | | | | | | | |
Collapse
|
17
|
Abstract
The Lanthony D15 desaturated test was used to compare color vision in sickle cell patients with 20/20 visual acuity and peripheral lesions of sickle cell retinopathy with normal controls. Sickle cell patients had significantly higher Lanthony error scores and significantly more blue-yellow and mixed color vision defects than controls. Among patients with sickle cell anemia (SS), Lanthony and Farnsworth Munsell 100 Hue test scores were significantly correlated, and both tests showed good agreement in identifying the presence or absence of a color defect. These results suggest that the Lanthony D15 test may be a useful clinical tool to identify blue-yellow color defects, especially because of its brevity and simplicity of administration.
Collapse
Affiliation(s)
- M Roy
- National Eye Institute Clinical Branch, National Institutes of Health, Bethesda 20892
| | | | | | | |
Collapse
|
18
|
Abstract
The Farnsworth-Munsell 100-hue test was used to compare color vision in patients with sickle cell anemia, 20/20 visual acuity, and mild to severe peripheral retinopathy, but without posterior retinal vessel involvement, with matched normal controls. Patients with sickle cell anemia had significantly more blue-yellow and mixed color vision defects and significantly higher Farnsworth-Munsell 100-hue scores than did controls. There were no significant associations between color vision defects and the severity of peripheral retinal findings or the diameter of the foveal avascular zone. These results suggest that color vision defects may exist in patients with sickle cell anemia in the absence of ophthalmoscopic retinal changes in the posterior fundus.
Collapse
Affiliation(s)
- M S Roy
- National Eye Institute, Clinical Branch, Bethesda, MD
| | | | | | | | | |
Collapse
|
19
|
Heidemann SR, Joshi HC, Schechter A, Fletcher JR, Bothwell M. Synergistic effects of cyclic AMP and nerve growth factor on neurite outgrowth and microtubule stability of PC12 cells. J Cell Biol 1985; 100:916-27. [PMID: 2982887 PMCID: PMC2113527 DOI: 10.1083/jcb.100.3.916] [Citation(s) in RCA: 123] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The outgrowth of neurites from rat PC12 cells stimulated by combined treatment of nerve growth factor (NGF) with cAMP is significantly more rapid and extensive than the outgrowth induced by either factor alone. We have compared the responses of PC12 cells under three different growth conditions, NGF alone, cAMP alone, and combined treatment, with respect to surface morphology, rapidity of neurite outgrowth, and stability of neurite microtubules, to understand the synergistic action of NGF and cAMP on PC12. Surface events at early times in these growth conditions varied, suggesting divergent pathways of action of NGF and cAMP. This suggestion is strongly supported by the finding that cells exposed to saturating levels of dibutyryl cAMP without substantial neurite outgrowth initiated neurites within 5 min of NGF. This response has been adopted as a convenient assay for NGF. Neurites that regenerated in the three growth conditions showed marked differences in stability to treatments that depolymerize microtubules. The results indicate that microtubules in cells treated with both NGF and cAMP are significantly more stable than in either growth factor alone. We suggest that a shift of the assembly equilibrium favoring tubulin assembly is a necessary prerequisite for the initiation of neurites by PC12.
Collapse
|
20
|
|
21
|
Schechter A, Goldman J. [Cyclopia: a rare case of congenital malformation]. Harefuah 1974; 87:464-5. [PMID: 4215705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
22
|
|
23
|
Schechter A, Friedman S, Eckerling B. [Treatment of male sterility with arginine]. Harefuah 1971; 80:72-3. [PMID: 5098850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
24
|
Polishuk WZ, Schechter A, Kozminski T. The use of Ro 4-8347 in amenorrhea and anovulation. Bull Schweiz Akad Med Wiss 1970; 25:565-74. [PMID: 5510180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
25
|
Polishuk WZ, Laufer A, Schechter A. Cytological and endometrial effects of retroprogesterone Ro 4-8347. Bull Schweiz Akad Med Wiss 1970; 25:466-71. [PMID: 5510173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
26
|
Friedman S, Schechter A, Eckerling B. [Fetal mortality in twin deliveries. A 10 year survey]. Harefuah 1970; 79:260-3. [PMID: 5534937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
27
|
|
28
|
Goldman JA, Schechter A. Effect of cigarette smoking on glucose tolerance in pregnant women. Isr J Med Sci 1967; 3:561-4. [PMID: 6056793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
29
|
|