576
|
Trattner A, Krichely D, David M. Blue rubber bleb nevus syndrome associated with diffuse angiokeratoma. Cutis 1997; 59:264-6. [PMID: 9169267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report a case of the association of blue rubber bleb nevus syndrome with diffuse angiokeratoma, without any evidence of enzyme deficiencies. The lesions of both disorders had a late-onset appearance.
Collapse
|
577
|
Bouffet E, Basset T, Chetail N, Dijoud F, Mollard P, Brunat-Mentigny M, David M. Juvenile granulosa cell tumor of the ovary in infants: a clinicopathologic study of three cases and review of the literature. J Pediatr Surg 1997; 32:762-5. [PMID: 9165474 DOI: 10.1016/s0022-3468(97)90029-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The clinical and pathological features of three cases of juvenile granulosa cell tumors occurring in infants were studied. Precocious pseudopuberty developed in two patients and acute abdominal symptoms related to the rupture of the tumor developed in one. Surgery was the only treatment in each case and no adjuvant therapy was delivered. No patient experienced relapse. Histological examination showed a predominantly diffuse pattern with prominent luteinization. Call-Exner bodies were absent. Two tumors had multilocular thin walled cysts containing large amounts of estradiol, the third one contained rudimentary microfollicles. The prognosis of juvenile granulosa cell tumors in infancy appears more favorable than those occurring in older patients. No case of tumor recurrence has been reported in infancy so far. Surgery appears to be the state-of-the-art treatment of these tumors and additional therapy (chemotherapy or radiotherapy) must be discussed with caution, even in advanced stages.
Collapse
|
578
|
Marcus H, Shimoni A, Ergas D, Canaan A, Dekel B, Ben-David D, David M, Sigler E, Reisner Y, Berrebi A. Human/mouse radiation chimera generated from PBMC of B chronic lymphocytic leukemia patients with autoimmune hemolytic anemia produce anti-human red cell antibodies. Leukemia 1997; 11:687-93. [PMID: 9180293 DOI: 10.1038/sj.leu.2400645] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Previous studies performed in our laboratory have shown that B-CLL cells are involved in the production of anti-red cell auto-antibodies, providing a possible mechanism for the autoimmune hemolytic anemia occurring during the course of B-CLL. In order to confirm this hypothesis, we attempted to transfer human B-CLL with AIHA to immunodeficient mice. Peripheral blood mononuclear cells (PBMC) from 11 B-CLL patients suffering from AIHA were transplanted into the peritoneal cavity of lethally irradiated Balb/c mice reconstituted with SCID bone marrow. Chimeric mice generated from PBMC of these patients (in stage III-IV of the disease) exhibited an engraftment profile with dominance of tumor cells and minuscule levels of T cells. Eighty-five percent of the chimeric mice generated from 10 out of the 11 B-CLL patients with Coombs'-positive AIHA, produced human Ig with anti-human red cell specificity as detected by indirect anti-globulin test. In addition, anti-red cell auto-antibodies were produced in 36% of chimeric mice generated from PBMC of Coombs'-negative B-CLL. In contrast, control experiments in which splenic cells from idiopathic AIHA or PBMC from normal donors were transplanted, failed to produce anti-RBC. This in vivo model further supports the relationship between the B cell expansion and the autoimmune hemolytic process.
Collapse
|
579
|
Burakova T, Marcus H, Canaan A, Dekel B, Shezen E, David M, Lubin I, Segal H, Yair R. Engrafted human T and B lymphocytes form mixed follicles in lymphoid organs of human/mouse and human/rat radiation chimera. Transplantation 1997; 63:1166-71. [PMID: 9133480 DOI: 10.1097/00007890-199704270-00018] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND We recently described a new approach that enables the generation of human/mouse chimera by adoptive transfer of human peripheral blood mononuclear cells into lethally irradiated normal strains of mice or rats, radioprotected with bone marrow from donors with severe combined immune deficiency. In such human/mouse chimera, a marked humoral response to recall antigens, as well as a significant primary response to keyhole limpet hemocyanin, has been generated. METHODS In the present study, the organ distribution of the engrafted human cells in the human/mouse and human/rat chimera was investigated by immunohistochemistry. RESULTS Our results show that the T cells seem to be distributed throughout the reticular endothelial system, almost behaving like particles without any homing specificity. The B cells, however, can barely be found in internal organs, such as the liver or the pancreas, and are concentrated in the secondary lymphoid system (e.g., spleen, lymph node, and nonencapsulated lymphoid tissue). The B cells, together with the engrafted human T cells, form mixed lymphoid follicles. CONCLUSIONS The different homing patterns exhibited by the T and B lymphocytes indicate that the homing receptors on human B cells might be cross-reactive with their mouse counterparts, in contrast to the human T cells, which seem to be unable to interact with the mouse homing receptors. The presence of human B and T lymphocytes in close proximity to each other in the lymphoid tissues is in accordance with the ability of human/BALB radiation chimera to mount significant primary human antibody responses.
Collapse
|
580
|
Duléry BD, Petty MA, Schoun J, David M, Huebert ND. A method using a liquid chromatographic-electrospray-mass spectrometric assay for the determination of antimigraine compounds: preliminary pharmacokinetics of MDL 74,721, sumatriptan and naratriptan, in rabbit. J Pharm Biomed Anal 1997; 15:1009-20. [PMID: 9160269 DOI: 10.1016/s0731-7085(96)01955-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
MDL 74,721 (I), sumatriptan(II) and naratriptan(III) are new 5-HT1-like agonists that have potential as a novel treatment for migraine. Liquid chromatographic-electrospray-mass spectrometric (LC-ESI-MS) assay have been developed to compare the pharmacokinetics of these three antimigraine compounds. The concentration of each parent drug was determined using a solid-phase extraction method and LC-ESI-MS analysis demonstrating the high sensitivity and specificity of the methods down to subnanogram levels in rabbit plasma samples. Pharmacokinetic parameters evaluated after administration of single intravenous and oral doses were very similar and the ANOVA analysis did not show any statistically significant differences for t1/2, Cmax, V or AUC (normalised). The pharmacokinetic parameters showed short t1/2 (range 1.14-1.9 h) either after intravenous (i.v.) or oral (p.o.) administration and high total body clearance (CL) after the p.o. dose both probably due to extensive and rapid metabolism of the parent drugs as suggested by the low values for bioavailability (range 13.4-22.8%).
Collapse
|
581
|
Shimoni A, Marcus H, Canaan A, Ergas D, David M, Berrebi A, Reisner Y. A model for human B-chronic lymphocytic leukemia in human/mouse radiation chimera: evidence for tumor-mediated suppression of antibody production in low-stage disease. Blood 1997; 89:2210-8. [PMID: 9058746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
B-chronic lymphocytic leukemia (BCLL) is a lymphoproliferative disease that is characterized by clonal expansion of CD5+ B cells. BCLL is associated with secondary immunodeficiency and hypogammaglobulinemia. It has been suggested that T-cell dysregulation may play a role in the hypogammaglobulinemia and in the increased incidence of autoimmunity in BCLL patients. We attempted to transfer human peripheral blood mononuclear cells (PBMC) from BCLL patients in different stages of the disease into immunodeficient mice. PBMC from BCLL patients in stage 0, stages I to II, and stages III to IV were transplanted into the peritoneal cavity of lethally irradiated Balb/c or beige/nude/Xid (BNX) mice radioprotected with bone marrow (BM) from severe combined immunodeficiency (SCID) mice. Different engraftment profiles were found in the chimeric mice 2 weeks after transplantation of PBMC according to the disease stage of the BCLL donors. Infusion of PBMC from donors in stage 0 led to marked engraftment of human T cells, whereas the human tumor cells could hardly be detected. In contrast, chimeric mice receiving PBMC from patients in stage III to IV disease exhibited engraftment with a dominance of tumor cells, compared with a miniscule level of T cells. The ability of the engrafted cells to produce human Ig was also found to be correlated with the disease stage of the donor, although all donors had the same magnitude of hypogammaglobulinemia. Total human Ig production in the chimeric mice was normal in mice receiving PBMC from donors in stage 0, whereas in chimeric mice engrafted with PBMC from donors in stages III to IV almost no human Igs could be detected. This differential reconstitution of antibody production in the mouse model according to the stage of the patient's disease will allow further studies on possible cellular interactions between malignant and immune cells in BCLL.
Collapse
MESH Headings
- Adoptive Transfer
- Aged
- Aged, 80 and over
- Animals
- Disease Models, Animal
- Female
- Graft Enhancement, Immunologic
- Humans
- Immunoglobulins/biosynthesis
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Lymphocyte Transfusion
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred NOD
- Mice, Nude
- Mice, SCID
- Middle Aged
- Organ Specificity/immunology
- Radiation Chimera
Collapse
|
582
|
Gabrielle F, Roques F, Michel P, Bernard A, de Vicentis C, Roques X, Brenot R, Baudet E, David M. Is the Parsonnet's score a good predictive score of mortality in adult cardiac surgery: assessment by a French multicentre study. Eur J Cardiothorac Surg 1997; 11:406-14. [PMID: 9105801 DOI: 10.1016/s1010-7940(96)01110-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE Parsonnet proposed a preoperative score ("initial Parsonnet's score", which predicts the hospital mortality of adult cardiac surgery. This score was then modified by including several risk factors used in the 'SUMMIT' system ("modified Parsonnet's score", 44 variables). We wanted to assess the predictive value of these two scores in a French surgical population. METHODS From December 1992 to April 1993, in France, we organised a prospective multicentre study on adult cardiac surgery mortality and morbidity. Data on 6649 patients were included. We analysed statistically the predictive value of each risk factor and of the two scores on mortality and morbidity at one month. RESULTS Only 6 of the 15 variables of the initial Parsonnet's score and 19 of the 44 variables of the modified Parsonnet's score significantly influence hospital mortality. Both scores are able to predict hospital mortality and severe morbidity, but the modified Parsonnet's score has the best predictive value (initial Parsonnet's score: odds ratio by point of score = 1.01, area under the roc curve = 0.64; modified Parsonnet's score: odds ratio by point of score = 1.05, area under the roc curve = 0.70). CONCLUSIONS This study shows that the Parsonnet's scores are predictive, but that these scores remain imperfect: many risk factors are non significant, the initial Parsonnet's score has a moderate predictive value, and the modified Parsonnet's score is too complex (44 variables). Thus, we have built a new score for cardiac surgery in French adults.
Collapse
|
583
|
Lefez C, Reybet-Degat O, Wolf JE, Louis P, Favre JP, David M. [Intrabronchial migration and extraction of a fragment of an Accufix J-shaped atrial pacing catheter]. ARCHIVES DES MALADIES DU COEUR ET DES VAISSEAUX 1997; 90:291-3. [PMID: 9181039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The authors report a case of exteriorisation and migration of a fragment of a J-shaped atrial Accufix Telectronix (Stimarec Class IV) responsible for a bronchial penetration without clinical repercussion. A systematic control chest X-ray detected this complication. The position of the metallic fragment was determined by chest CT scan and bronchial fibroscopy between the inferior right lobar bronches and artery confirming bronchial perforation. Rigid bronchoscopy with direct visualisation enabled extraction of the foreign body without complications.
Collapse
|
584
|
Touati G, Léger J, Toublanc JE, Farriaux JP, Stuckens C, Ponte C, David M, Rochiccioli P, Porquet D, Czernichow P. A thyroxine dosage of 8 micrograms/kg per day is appropriate for the initial treatment of the majority of infants with congenital hypothyroidism. Eur J Pediatr 1997; 156:94-8. [PMID: 9039509 DOI: 10.1007/s004310050562] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
UNLABELLED The adequate L-thyroxine dosage for the initial treatment of infants with congenital hypothyroidism is a subject of controversy. Some recommend higher dosages (> 10 micrograms/kg/day) to ensure adequate levels, while others advocate lower dosages to permit normalisation of thyroid status. The aim of this study was to evaluate the results of a treatment strategy using an initial dosage of 7.5-8.0 micrograms/kg per day, TSH measurements being taken at 15 and 30 days of treatment. Fifty one newborns infants with primary congenital hypothyroidism detected by neonatal screening were treated with the same therapeutic strategy. A mean L-thyroxine dosage of 7.9 micrograms/kg per day at the onset of treatment and 6.6 micrograms/kg/d at 2 months, normalised the FT4 and FT3 levels at 15 days in 100% and TSH levels at 2 months in 90% of cases. Many patients showed elevated levels of FT4 and a systematic higher initial dosage could expose many infants to a dangerous hyperthyroidism. Patients with abnormal TSH levels at 2 months already had higher TSH levels in the first 8 weeks of life and, despite higher L-thyroxine dosage, also exhibited lower FT4 and FT3 levels. These patients who needed an early increase in dosage had already shown a more profound ante and neonatal hypothyroidism. This subgroup of patients require a higher dosage of thyroxine and early assessment of FT4, FT3 and TSH levels are required for optimum dosage choice. CONCLUSION Even though a subgroup of patients may require a higher dosage of L-thyroxine, an initial dosage of 7.5-8.0 micrograms/kg per day, with an early assessment of FT4, FT3, and TSH levels, is adequate for the treatment of the majority of infants with congenital hypothyroidism.
Collapse
|
585
|
Laurent A, Foussard N, David M, Boucharlat J. A Follow-Up Study of French Suicidal Adolescents. Eur Psychiatry 1997. [DOI: 10.1016/s0924-9338(97)80726-2] [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: 10/18/2022] Open
|
586
|
David M, Nicolino M, Mollard P, Forest M. Étude de la croissance chez 15 patients atteints de dysgénésie gonadique mixte: effet du traitement par l'hormone de croissance et implication dans le choix du sexe. Arch Pediatr 1997. [DOI: 10.1016/s0929-693x(97)86516-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
587
|
Chapuis FR, Ploin D, Vermont J, Chatelain P, David M, Floret D. Antibiotics use evaluation: How do French hospital doctors in outpatients pediatrics emergency ward comply with ambulatory clinical guidelines? J Clin Epidemiol 1997. [DOI: 10.1016/s0895-4356(97)87296-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
588
|
David M. Education and bonhomie at Jalandhar. A report on XVII S.N.A. Biennial Conference. THE NURSING JOURNAL OF INDIA 1997; 88:5-8. [PMID: 9287723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
589
|
Eicher JC, de Nadai L, Falcon-Eicher S, Lefez C, André F, Fabre JL, Tatou E, Jeannin L, David M, Wolf JE. [Unexplained pulmonary edema: demonstration of obstruction to pulmonary venous return by transesophageal echocardiography. Apropos of 4 cases]. ARCHIVES DES MALADIES DU COEUR ET DES VAISSEAUX 1997; 90:67-74. [PMID: 9137717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The usual causes of pulmonary edema are left ventricular dysfunction, mitral valve disease or left atrial myxoma. Obstruction to pulmonary venous drainage is a rare and unrecognised diagnosis which should be considered when the usual investigations are unproductive. The authors report four cases in which transesophageal echocardiography showed pulmonary edema to be due to compression of one or more pulmonary veins by a mediastinal mass (2 cases), by the false lumen of dissection of the aorta (1 case) and postoperative stenosis of the pulmonary veins (1 case). These cases underline the diagnostic value of this technique which rapidly provides diagnostic information with privileged visualisation of the pulmonary veins and abnormalities of acceleration of blood velocities in the Doppler mode due to obstruction.
Collapse
|
590
|
Hagler J, Trattner A, Nativ O, Hauben DJ, David M. Benign and malignant eccrine poroma--a flow cytometric comparison. ISRAEL JOURNAL OF MEDICAL SCIENCES 1996; 32:1151-1153. [PMID: 9007142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Eccrine poroma is a benign, slow growing, solitary adnexal tumor. Malignant degeneration may take place in longstanding solitary lesions; in such cases cutaneous and fatal visceral metastases have occurred. Our goal was to determine whether flow cytometry yields useful diagnostic and prognostic information on benign and malignant eccrine poroma. Flow cytometric analysis of the nuclear DNA ploidy pattern was performed on four samples of eccrine poroma and five samples of malignant eccrine poroma. All the histograms of the eccrine poromas were diploid. Two of five specimens (40%) of the eccrine porocarcinoma were aneuploid, and the other three (60%) were diploid. The diploid pattern represents another expression of the benignancy of eccrine poroma. Since abnormal DNA content is often correlated with tumor grade, the aneuploid DNA histogram of 40% of the patients with malignant eccrine poroma is not a surprising finding in this cytologically malignant neoplasm.
Collapse
|
591
|
Segal R, Kritzman A, Cividalli L, Samra Z, David M, Tiqva P. Treatment of Candida nail infection with terbinafine. J Am Acad Dermatol 1996; 35:958-61. [PMID: 8959955 DOI: 10.1016/s0190-9622(96)90120-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Terbinafine is a highly potent drug against dermatophytes. Data regarding its effectiveness against Candida species are few and variable. OBJECTIVE Our purpose was to evaluate the efficacy and safety of oral terbinafine in patients with Candida nail infection. METHODS In an open-label uncontrolled study, 20 patients completed 16 weeks of treatment with terbinafine, 250 mg/day, and an additional 8 weeks with placebo. Efficacy was assessed clinically and mycologically at weeks 0 (baseline), 4, 8, 16, 24, 36, and 48. Routine laboratory studies were performed at baseline and weeks 4, 8, and 16. RESULTS At the end of the trial 60% of target nails were cured clinically and mycologically; in 10% there was mycologic cure with residual clinical signs, in 25% a moderate improvement (> 50%), and failure in only 5% (one patient). Most nails were infected by Candida parapsilosis. Two of 28 patients showed mild reversible elevation of liver enzymes 1 month after initiation of terbinafine treatment. CONCLUSION The administration of terbinafine for 16 weeks is effective in the treatment of Candida nail infection. Liver enzyme values should be determined during the first month of treatment.
Collapse
|
592
|
Chelloul H, Carpentier P, David M, Sallé E, Kenen C. [Welcome, thought, pitfall and grief]. Soins Psychiatr 1996:27-30. [PMID: 9016192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
593
|
Gilhar A, David M, Kalish RS, Weisinger G. In vivo effects of cytokines on psoriatic skin grafted on nude mice: involvement of the tumour necrosis factor (TNF) receptor. Clin Exp Immunol 1996; 106:134-42. [PMID: 8870711 PMCID: PMC2200558 DOI: 10.1046/j.1365-2249.1996.d01-802.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Following engraftment of human involved psoriatic skin to nude mice there is a partial normalization of pathology associated with a loss of inflammatory leucocytes. However, the epidermis remains hyperproliferative, which may reflect a primary defect. The roles of TNF-alpha, IL-1 and IL-6 in epidermal hyperproliferation of grafted psoriatic lesions were investigated. Before and after treatment, grafts were analysed to determine epidermal thickness and labelling index (LI). HLA-DR, intercellular adhesion molecule-1 (ICAM-1), and TNF receptor (TNF-R; p75 and p55) expression were determined by immunoperoxidase staining. Psoriatic epidermis was found consistently to be negative for p55 TNF-R and p75 TNF-R before grafting. Following engraftment, TNF-R-positive cells (i.e. p55 by keratinocytes; p75 by epidermal dendritic cells) were identified throughout the epidermis. Higher numbers of p75 TNF-R epidermal dendritic cells were found in grafts following a course of TNF-alpha, IL-6 or IL-1 treatment. The p55 form of the TNF-R expressed by keratinocytes was significantly elevated after treatment with TNF-alpha or IL-6. HLA-DR and ICAM-1 were also expressed in these grafts. TNF-alpha, anti-IL-1, and anti-IL-6 treatment induced a marked decrease in the epidermal thickness and LI of psoriatic graft tissue, correcting the hyperproliferation associated with psoriatic epidermis. Supraphysiological levels of TNF-alpha may saturate and consequently down-regulate their own receptors, leading to a paradoxical inhibitory effect.
Collapse
|
594
|
Cohen AM, Hodak E, David M, Mittelman M, Gal R, Stern R. Beneficial effect of granulocyte-colony stimulating factor in scleromyxoedema associated with severe idiopathic neutropenia. Br J Dermatol 1996; 135:626-9. [PMID: 8915161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The treatment of scleromyxoedema is notoriously difficult. We present a patient with long-standing diffuse scleromyxoedema associated with functional impairment who developed chronic idiopathic neutropenia complicated by recurrent life-threatening infections. Treatment with recombinant granulocyte--colony stimulating factor led to normalization of the neutrophil count, prevented further systemic infections, and unexpectedly was associated with a striking clinical improvement of her skin disorder and decrease in mucin deposition in the dermis.
Collapse
|
595
|
Rousselle C, Madinier-Chappat N, Vasselon-Raina M, DaSilva I, Guibal A, Guibaud L, Tixier F, Zanelli S, Bovier-Lapierre M, David M. Accidents vasculaires cérébraux ischémiques de l'enfant: intérêts des examens d'imagerie vasculaire (angio-IRM, artériographie endovasculaire). Arch Pediatr 1996. [DOI: 10.1016/0929-693x(96)87640-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
596
|
Disdier P, Fossat C, Veit V, David M, Swiader L, Harle JR, Juhan-Vague I, Weiller PJ. Hyperactive polymorphonuclear leucocytes migration in patients with Familial Mediterranean Fever. Clin Rheumatol 1996; 15:517-8. [PMID: 8894373 DOI: 10.1007/bf02229658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
597
|
Rousselle C, N'Guyen M, Vasselon-Raina M, Madinier-Chappat N, Guibal A, Guibaud L, Boggio D, Gonnaud P, David M. Diagnostic précoce du syndrome de Cockayne: à propos de deux observations. Arch Pediatr 1996. [DOI: 10.1016/0929-693x(96)87642-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
598
|
David M, Zhou G, Pine R, Dixon JE, Larner AC. The SH2 domain-containing tyrosine phosphatase PTP1D is required for interferon alpha/beta-induced gene expression. J Biol Chem 1996; 271:15862-5. [PMID: 8663536 DOI: 10.1074/jbc.271.27.15862] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Interferons (IFNs) induce early response genes by stimulating Janus family (Jak) tyrosine kinases, leading to tyrosine phosphorylation of Stat (signal transducer and activator of transcription) proteins. Previous studies demonstrated that a protein-tyrosine phosphatase (PTP) is required for activation of the ISGF3 transcription complex by IFNalpha/beta, but the specific PTP responsible remained unidentified. We now show that the SH2 domain containing tyrosine phosphatase PTP1D (also designated as SHPTP2, SHPTP3, PTP2C, or Syp) is constitutively associated with the IFNalpha/beta receptor and becomes tyrosine-phosphorylated in response to ligand. Furthermore, transient expression of a phosphatase-inactive mutant or the COOH-terminal SH2 domain of PTP1D causes a dominant negative effect on IFNalpha/beta-induced early response gene expression. These results provide strong evidence that PTP1D functions as a positive regulator of the IFNalpha/beta-induced Jak/Stat signal transduction pathway.
Collapse
|
599
|
Kenney BD, David M, Bensoussan AL. Anticoagulation without catheter removal in children with catheter-related central vein thrombosis. J Pediatr Surg 1996; 31:816-8. [PMID: 8783111 DOI: 10.1016/s0022-3468(96)90141-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Catheter-related central venous thrombosis is a serious and common problem among children. The traditional management has been anticoagulation and early catheter removal. Unfortunately, many patients require a new catheter, which is associated with complications that include possible further thrombosis. Although others have used thrombolytic agents in attempts to avoid catheter removal, the authors of the present study believe that the associated complications occur too frequently and are too serious. They have had success with standard anticoagulation in a limited number of patients. Between February 1991 and April 1994, 17 patients (6 weeks to 19 years of age) were treated for catheter-related deep venous thrombosis. Eight patients underwent early catheter removal accompanied by anticoagulation; two of them had intrinsic catheter problems that necessitated removal, and one had hemophilia. Nine others received anticoagulation without catheter removal. Of these, one required catheter removal after 10 days heparin administration failed to diminish the thrombosis. Another patient responded well to anticoagulation but required catheter removal several weeks later because of catheter-site infection. The other seven patients responded well to anticoagulation, and their catheters were retained. For patients with a functional catheter essential to their care, anticoagulation may safely prevent catheter removal.
Collapse
|
600
|
Casscells W, Hathorn B, David M, Krabach T, Vaughn WK, McAllister HA, Bearman G, Willerson JT. Thermal detection of cellular infiltrates in living atherosclerotic plaques: possible implications for plaque rupture and thrombosis. Lancet 1996; 347:1447-51. [PMID: 8676628 DOI: 10.1016/s0140-6736(96)91684-0] [Citation(s) in RCA: 214] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Atherosclerotic lesions are heterogeneous and prognosis cannot easily be predicted, even with intracoronary ultrasound and angioscopy. Serial angiographic and necropsy studies suggest that the risk of plaque rupture correlates only weakly with the degree of stenosis. Most ruptured plaques are characterised by a large pool of cholesterol or necrotic debris and a thin fibrous cap with a dense infiltration of macrophages. The release of matrix-digesting enzymes by these cells is thought to contribute to plaque rupture. Other thromboses are found on non-ruptured but inflamed plaque surfaces. We postulated that both types of thrombotic events may be predicted by heat released by activated macrophages either on the plaque surface or under a thin cap. METHODS To test the hypothesis, we measured the intimal surface temperatures at 20 sites in each of 50 samples of carotid artery taken at endarterectomy from 48 patients. The living samples were probed with a thermistor (24-gauge needle-tip; accuracy 0.1 degree C; time contrast 0.15 s). The tissues were then fixed and stained. FINDINGS Plaques showed several regions in which the surface temperatures varied reproducibly by 0.2-0.3 degrees C, but 37% of plaques had substantially warmer regions (0.4-2.2 degrees C). Points with substantially different temperatures could not be distinguished from one another by the naked eye; such points could also be very close to one another (< 1 mm apart). Temperature correlated positively with cell density (r = 0.68, p = 0.0001) and inversely with the distance of the cell clusters from the luminal surface (r = -0.38, p = 0.0006). Most cells were macrophages. Infrared thermographic images also revealed heterogeneity in temperature among the plaques. INTERPRETATION Living atherosclerotic plaques show thermal heterogeneity, which raises the possibility that an infrared catheter or other techniques that can localise heat or metabolic activity might be able to identify plaques at high risk of rupture or thrombosis.
Collapse
|