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E Delaporte

Publications and source records attributed to E Delaporte.

At least 91 records · Page 5Linked to original sources

[Giant multifocal venous malformation with monomelic predominance].

INTRODUCTION: Venous malformations are usually easy to recognise. We describe one case in which the clinical aspect was suggestive of Maffucci's syndrome. OBSERVATION: A 44-year-old male, had numerous angiomatous nodules which could be emptied by pressure since infancy. The progressive increase in volume of these lesions on the arms and forearms led to enormous deformation and major disability. The thoracic area and the right foot were also affected to a lesser degree. Two endobuccal lesions were also found on the clinical examination The cutaneous lesions were tender and occasionally hyperhidrosis was present. The presence of phleboliths on Xray and the presence of venous and capillary cavities with numerous thrombi confirmed the diagnosis of venous malformation. Following the failure of the Ethibloc(R) embolization, eight excisions were made in a two-year-period with a good functional result. Elastic strapping was then applied. DISCUSSION: The diagnosis of venous malformation was based on clinical, radiological and histological findings. The absence of chondroma excluded the diagnosis of Maffucci's syndrome. Spindle cell hemangioendothelioma, "blue rubber bleb nevus" and glomangiomatosis were confirmed by the histological findings. The absence of port-wine stain or bone hypertrophy and the presence of multiple nodules excluded Klippel-Trenaunay syndrome. The presence of multifocal involvement with oral lesions, the severity of the deformation and the relative success of the surgical procedure make this case unusual.

Adult↗

[Genetic diversity of HIV infection worldwide and its consequences].

Phylogenetic study of HIV-1 strains from different geographical locations has revealed the existence of three separate groups that have been named M, N, and O. Most strains involved in the pandemia belong to group M which contains several subtypes. Nearly 20 p. 100 of isolates in group M are recombinant with genomic components from different subtypes. Some mosaic virus are one-of-a-kind or limited to small transmission groups while others are major players in the worldwide AIDS epidemic. They are currently called circulating recombinant forms (CRFs). Since subtypes or CRFs must be similar over the whole genome, only 9 subtypes are possible within group M (A, B, C, D, F, G, H, J and K). Viruses E and I in the envelope are recombinant. Subtyping is a powerful molecular tool for monitoring the evolution of the HIV-1 epidemic. Overall the predominant viral forms in the world are subtypes A and C followed by recombinant CRF01-AE (formerly subtype E) and CRF02-AG (identical to the IBNG prototype strain in Nigeria) and subtype B. The highest degree of genetic diversity in HIV-1 is observed in Africa where all subtypes and groups can be observed. The geographic distribution of subtypes is subject to constant change. Recombinant forms of the virus will continue to appear as long as the different subtypes of HIV-1 continue to circulate between continents and recombination continues to occur.

Acquired Immunodeficiency Syndrome↗

Genetic characterization of accessory genes from human immunodeficiency virus type 1 group O strains.

Human immunodeficiency virus type 1 (HIV-1) group O strains have been described as highly divergent, compared with the vast majority of the viruses involved in the worldwide AIDS pandemic, classified in group M. To gain new insights into the diversity and genetic characteristics of group O, we have sequenced the accessory gene region (from vif to vpu) of 14 isolates. Analyses of the deduced amino acid sequences for Vif, Vpr, the first exon of Tat, and Vpu indicate that most of the functional domains of these proteins, as described for group M viruses, are highly conserved and retained among all the group O strains we have characterized. The only difference concerns the Vif phosphorylation sites, which are absent in all of the group O isolates we have sequenced; in contrast, they are well conserved in nearly all of the group M isolates, in which they play critical roles in the regulation of viral replication and infectivity. As already observed for group M isolates, the Vpu protein is also highly diverse among group O strains. Phylogenetic analyses of these sequences indicate that HIV-1 group O can be separated into four different clusters, containing most of the strains we have characterized (except one, which clusters outside of the analyzed viruses). Taking into account the criteria used for clades in group M, we were not able to define group O clades definitively.

Amino Acid Sequence↗

Two new human T-lymphotropic virus type I phylogenetic subtypes in seroindeterminates, a Mbuti pygmy and a Gabonese, have closest relatives among African STLV-I strains.

Six new HTLV-I strains from seroindeterminate individuals were analyzed: four from Gabon, one from a Mbuti Efe pygmy in Congo (formerly Zaire), and one from a Congolese patient residing in Belgium. The LTR and env regions were sequenced and phylogenetic analyses were performed to characterize the new strains. Nucleotide divergence and phylogeny results showed that four of the new strains belong to the HTLV-Ib Central African subtype. The other two strains, one from the Efe pygmy and one from Gabon, lie on distinct branches of the LTR and env trees with respect to the four major HTLV-I subtypes. Despite the low bootstrap values, likelihood mapping analyses proved that these strains can be considered two new HTLV-I molecular subtypes, putatively named HTLV-Ie and HTLV-If. A relation exists in the phylogenetic trees and in the likelihood maps between the new subtypes and African STLV-I strains from Papio spp. and Cercopithecus spp., suggesting one or more interspecies transmission events in the past. This study demonstrates that the phylogenetic subtyping of HTLV-I in the African continent is far from being completed and that samples presenting an indeterminate serology can potentially belong to new subtypes in humans. In addition, present day serological tests do not reliably type strains within the HTLV-Ib Central African subtype.

Base Sequence↗

Evidence of stable HIV seroprevalences in selected populations in the Democratic Republic of the Congo.

OBJECTIVE: To determine current data on HIV infection and to document changes and trends of HIV seroprevalence in selected populations over time in the Democratic Republic of the Congo (DRC; former Zaïre). METHODS: In February 1997, a large serosurvey was conducted on selected population groups from Kinshasa (capital city), Mbuji-May (southeast) and Bwamanda (northwest). Samples obtained from pregnant women, tuberculosis patients, commercial sex workers, blood donors and sexually transmitted disease patients were screened for the presence of HIV antibodies by a rapid assay and a commercial enzyme-linked immunosorbent assay. All reactive specimens were confirmed and discriminated by a line immunoassay, and were further tested for the presence of HIV-1 group O antibodies. Our results were compared to data reported in previous studies in Kinshasa. RESULTS: Of a total 1970 samples collected, 219 (11.1%) were HIV-1-reactive and seven (0.3%) were dually reactive to HIV-1 and HIV-2. No case of HIV-1 group O or HIV-2 infection was diagnosed. HIV seroprevalence in pregnant women was 3.1% (16 out of 511), 6.3% (19 out of 300) and 1.5% (one out of 65) in Kinshasa, Mbuji-Mayi, and Bwamanda, respectively. HIV seroprevalence in tuberculosis patients was 26% (52 out of 200), 28% (17 out of 60), and 35.3% (29 out of 83), respectively. HIV seroprevalence among blood donors was 3.1% in Kinshasa and 2.8% in Mbuji-Mayi. Compared with data from previous studies performed in Kinshasa, no substantial change in HIV infection rates was observed among the selected population groups. CONCLUSIONS: Our results show that HIV prevalence rates have remained relatively unchanged in selected populations despite the political instability and poor environment observed since 1991 in DRC. It also shows the presence, still at very low rate, of dual HIV-1/HIV-2 seropositivity and a growing problem of HIV infection in rural areas. In contrast to other Central African countries, no HIV-1 group O infections were detected in DRC.

Adult↗

Multiply spliced env and nef transcripts of simian immunodeficiency virus from West African green monkey (SIVagm-sab).

We have characterized the spliced transcripts of nef and envelope genes of SIVagm from African green monkey of the sabaeus subspecies. Most of the transcripts we have studied, representing the most abundant mRNA species in our assay, have undergone a specific splicing event that removes a part of the trans-activation response (TAR) element. This region is predicted to form a stable secondary structure (four stem-loop elements in SIVagm-sab) that affects the trans-activation of viral gene expression by Tat and the translation of the viral transcripts. Contrary to what is observed in other viruses, in which this R-region splicing has also been described (e.g., HIV-2), the LTR splicing in SIVagm-sab removes part of the first stem-loop and the following ones, nearly completely disrupting the TAR element secondary structure. Because LTR splicing seems to be a conserved feature among the strains we have characterized, these results suggest that this phenomenon could have important consequences for virus replication, pathogenicity, and latency.

Animals↗

Genetic subtypes of HIV type 1 and HIV type 2 strains in commercial sex workers from Bamako, Mali.

In Africa the highest HIV infection rate has been reported among female commercial sex workers (CSWs) who are at increasing risk of acquiring and transmitting HIV infection. In October 1995, 176 CSWs were studied in Bamako, the capital city of Mali. The ages of the CSWs ranged from 15 to 50 years old (mean, 28.8 years). Only 20.45% of the 176 CSWs were Malian; the majority were from Nigeria (32.9%) and Ghana (31.8%), and the remaining were from other African countries. Forty-one percent were active for less than 1 year as a commercial sex worker, and the length of prostitution for the remaining women ranged from 1 to 15 years (mean, 2.76). A total of 81 (46.02%) of the 176 CSWs were positive for HIV antibodies; 63 (35.8%) were HIV-1 positive, (3.9%) were HIV-2 positive, 11 (6.2%) had antibodies to HIV-1 and HIV-2, and none of them had antibodies to group O viruses. For all HIV antibody-positive samples, PBMCs were separated and genetic subtypes of HIV-1 were determined using the heteroduplex mobility assay (HMA), with ED5-ED12 as outer and ES7-ES8 as inner primers. Among the 66 HIV-1 strains characterized, 53 (80.3%) were subtype A, 2 (3.1%) belonged to subtype C, 1 (1.5%) belonged to subtype D, and 10 (15.1%) were identified as subtype G. Among the 10 subtype G strains, 8 were obtained from women who were very recent CSWs, with an activity of 1 year or less, assuming that there is a high probability that these infections occurred recently. Genetic subtypes of five HIV-2 viruses were determined by sequencing of the env and/or gag genes followed by phylogenetic analysis, and all of them belonged to subtype A. Comparison of HIV-1 and HIV-2 seroprevalence data from our study with previous data from Mali shows a significant rise in HIV-1 prevalence and a significant decrease in HIV-2 prevalence and confirms similar trends observed in neighboring countries. We have found four different genetic subtypes of HIV-1; however, subtype A is predominant and accounts for 80% of the cases and 15% of the HIV-1 infections were subtype G. It is important to continue the surveillance of subtypes on a systematic basis in order to see to what extent the proportions of the different subtypes will change over time.

Adolescent↗

Similar IL-5, IL-3, and GM-CSF syntheses by eosinophils in the jejunal mucosa of patients with celiac disease and dermatitis herpetiformis.

Celiac disease (CD) and dermatitis herpetiformis (DH) are gluten-sensitive diseases with different clinical features that can initiate similar intestinal changes. The flat-destructive stage corresponds to severe lesions involving activated T-cells. However, other inflammatory cells such as eosinophils are also abundant. The mechanisms for the intestinal recruitment of eosinophils in patients with CD and DH remain unknown. Eosinophil recruitment and activation are induced in vitro by three main cytokines: interleukin-3 (IL-3), interleukin-5 (IL-5), and granulocyte-macrophage colony-stimulating factor (GM-CSF). In this study, IL-3, IL-5, and GM-CSF were detected by immunohistochemistry in all patients with CD and DH but not in the control group. By ultrastructural immunogold staining, these three cytokines had the same subcellular localization in the granule matrix of eosinophils. This result suggests that eosinophils may be involved in the immune response at the flat-destructive stage of both CD and DH.

Adolescent↗

IgE antibodies in sera from patients with bullous pemphigoid are autoantibodies preferentially directed against the 230-kDa epidermal antigen (BP230)

Bullous pemphigoid (BP) is unique among autoimmune skin diseases in which a high serum IgE level has been detected. We sought to determine the antigenic specificity of these IgE antibodies in 39 BP sera by immunofluorescence microscopy, immunoblot, and ELISA. The patient's sera contained IgG antibodies to 230-kDa (BP230) (n = 20), 180-kDa (BP180) (n = 9), and both BP230 and BP180 (n = 10) antigens. Serum IgE levels varied from 29 to 5000 kIU/L (mean +/- SD, 856 +/- 1426 kIU/L), among which sera containing IgG antibodies to BP230 had an IgE level on average 4.3 times higher than anti-BP180 sera. IgE antibodies in 18 sera were found to be autoantibodies reactive either with an epidermal component of basement membrane zone by immunofluorescence microscopy on 1 M NaCl-split skin or with a 230-kDa antigen by immunoblots of cultured human keratinocytes. The 230-kDa epidermal antigen recognized by IgE antibodies comigrated with the BP230 as labeled by a specific human monoclonal antibody. IgE anti-BP230 antibodies in patients' sera were always associated with IgG autoantibodies. No sera contained IgE antibodies to BP180 or to any other epidermal or dermal antigens as verified by immunoblot and ELISA. A good correlation was found between the presence of IgE circulating autoantibodies and the level of serum IgE (P < 0.004). IgE antibodies to BP230, like IgG autoantibodies, were mapped primarily to the C-terminal end of the protein, as they labeled rBP55, a BP230 recombinant protein encoded by a cDNA for the C-terminal end of BP230.

Autoantibodies↗

Complete nucleotide sequence of an African human T-lymphotropic virus type II subtype b isolate (HTLV-II-Gab): molecular and phylogenetic analysis.

We report the first complete nucleotide sequence of an African human T-cell lymphotropic virus type II. This new strain, called HTLV-II-Gab (Gab), was obtained from the uncultured peripheral blood mononuclear cells of a 44-year-old healthy Gabonese male who lived in a remote rural area, with neither history of blood transfusion nor sexual intercourse with non-Africans. Using nested PCR, 25 overlapping fragments, representing the entire proviral genome, were obtained, cloned and sequenced. The overall nucleotide sequence comparison with the four other available complete HTLV-II genomes indicated that Gab was more closely related to the HTLV-II subtype b prototypes (98.9, 99.3 and 98.2% nucleotide similarity with G12, NRA and GU respectively) than to the subtype a prototype (95.1% nucleotide similarity with Mo). Restriction profiles studies and phylogenetic analyses confirmed that Gab was a subtype b strain. However, this strain represents a newly described restriction fragment length polymorphism subtype, closely related to one of the rare partially sequenced African isolates originating from a pygmy living in Cameroon (PYGCAM). Nevertheless, the very low genetic divergence observed between this new African strain and the American strains raises several questions on the origins and level of genetic variability over time of this human retrovirus.

Adult↗

Clinical algorithms for the screening of pregnant women for STDs in Libreville, Gabon: which alternatives?

OBJECTIVE: Sexually transmitted diseases (STDs) remain one of the major public health problems in the developing world. To implement a systematic screening of STDs among pregnant women in Libreville, Gabon, a preliminary cross sectional study on STD prevalence and risk factors was performed in antenatal clinics. A score, integrating risk factors and elementary clinical signs for the screening of STDs, showed higher performances compared with hierarchical algorithms. The prospective validation of this score based on six criteria (risk factors and simple clinical signs) was done in 1994-5. The sensitivity (76.7%), compared with results from other studies, was acceptable for diagnosing cervical infection (Neisseria gonorrhoeae and/or Chlamydia trachomatis) but the specificity was low (50.6%). In addition, the diagnostic values for diagnosing vaginal infection (Trichomonas vaginalis and/or Candida albicans) were poor. We then proposed to evaluate an alternative flowchart for the screening of cervical and vaginal infections. METHODS: In this study, 646 pregnant women were enrolled. Each woman was interviewed and examined by a physician and then was subjected to reference laboratory examinations. An algorithm in two steps, combining a risk assessment score at the beginning of a hierarchical process, followed by a second step more specifically applied to a limited number of women, was developed and evaluated. RESULTS: The prevalence rate was 11.3% for cervical infection and 39.5% for vaginal infection. The first step of the algorithm, applied to all pregnant women, is based on four criteria (age, marital status, dyspareunia, coloured vaginal discharge). It allows classification of the women into three classes: high, low, and intermediate risk of cervical infection. Only the patients with intermediate risk were submitted to further investigations including speculum and microscopic examination, and subsequently chlamydial antigen detection. This flowchart was 83.6% and 81.2% sensitive and 63.4% and 62.7% specific for predicting cervical infection and vaginal infection, respectively. CONCLUSION: Similar strategies using simple rapid tests for chlamydial and gonococcal infection would certainly constitute a good diagnostic tool. This theoretical model needs to be evaluated prospectively, not only to confirm their diagnostic value but also to evaluate their feasibility, reliability and acceptability, as well as their cost effectiveness.

Algorithms↗

Prospective evaluation of a flow chart using a risk assessment for the diagnosis of STDs in primary healthcare centres in Libreville, Gabon.

BACKGROUND: The serious impact of STDs on women and children in particular, and the linkage between STDs and HIV infection are a profound concern to public health worldwide. One of the main strategies against STDs is based on early diagnosis and treatment. However, this approach is limited by the lack of appropriate laboratory facilities. A syndromic approach has been recommended by the WHO but needs to be evaluated under field conditions. A preliminary cross sectional study on STD prevalence and risk factors in Libreville showed that 13.5% of pregnant women had gonococcal and/or chlamydial infection which justifies systematic screening of STDs. Based on the results of this study, different flow charts with or without a risk factor assessment (score) were designed. The flow chart with the best performances for diagnosing chlamydial or gonococcal cervical infection and routinely acceptable, was a score algorithm, based on two risk factors (age and marital status) and four simple clinical signs (pelvic or lumbar pain, vaginal discharge and its characteristics). Sensitivity and specificity were 76.9% and 40.4% respectively. Thus, the objective of this study was to evaluate this strategy under field conditions. METHODS: A prospective study among pregnant women attending antenatal clinics was done. The score was applied to each woman by a midwife and a physician, and specimens were collected for the reference laboratory tests. Validation of the algorithm was done by comparing the performances with the gold standard laboratory diagnosis. RESULTS: 646 pregnant women were enrolled. The prevalence of cervical infection was 11.3. The sensitivity and specificity of this algorithm recorded by the midwives were 73.3% and 54.8%, respectively and by the physician 76.7% and 50.6%. The proportion of women correctly classified by the midwives and by the physician was not significantly different. CONCLUSION: The score applied was well accepted by healthcare workers and patients, and was routinely practised. Results obtained by the midwives and by the physician were similar. Thus, the use of flow charts which adds a risk assessment to the syndromic approach for diagnosing cervical infections is feasible. However, the performances of such flow charts need to be improved before being used routinely.

Adult↗

[Pyostomatitis-pyodermatitis vegetans uncovering a case of Crohn disease].

BACKGROUND: Pyostomatitis-pyodermatitis vegetans is an uncommon condition associated with chronic inflammatory bowel disease in 75% of the cases, usually hemorrhagic rectocolitis. CASE REPORT: A 48-year-old man was referred for recent development of pustulous lesions of the lips and buccal mucosa and weight loss. He complained of abdominal pain and intermittent diarrhea which had persisted for more than one year. During the last three months, a pseudotumoral plaque with a pustulous rim had developed over the two distal phalanxes of the right middle finger in association with ungueal lysis and nodular, vegetating and crusted lesions on the lateral aspect of the left arm. Small pustules covered the entire buccal mucosa excepting the tongue and the glans forming a typical snail trace aspect. Bacterial and mycological samples were negative. The histology reports for skin and mucosa were similar: epithelial hyperplasia, intra- and subepithelial granulocyte micro-abscesses and polymorphous infiltration of the superficial derma with numerous neutrophils and eosinophils. There was a discrete interkeratinocytic fluorescence at direct immunofluorescence but indirect immunofluorescence was negative. Anti-desmogleine 1 immunolabeling showed typical normal skin uptake and immunotransfer was negative. Digestive tract endoscopy and histopathology examination of the bowel specimens confirmed the diagnosis of Crohn's disease. Clinical manifestations improved dramatically with prednisone. DISCUSSION: This case of pyostomatitis-pyodermatitis vegetans involved several aspects rarely reported in the literature: a) the cutaneomucosal signs were inaugural; b) the association with Crohn's disease; c) the presence of lesions to the genital mucosa; d) the unusual localization of the inaugural skin manifestations. This clinical entity has now been clearly distinguished from pemphigus vegetans. There was however a long debate on the similar clinical, histological and even immunological expressions. We suggest that pyostomatitis-pyodermatitis vegetans belongs to the spectrum of neutrophilic dermatoses and other authors even propose it is a clinical form of pyoderma gangrenosum.

Colonoscopy↗

[The synovitis-acne-pustulosis-hyperostosis-osteitis (SAPHO) syndrome, a rare extra-digestive manifestation of Crohn's disease. Presentation of 1 case and review of the literature].

We report the case of a 33-year-old man with a severe Crohn's disease since the age of sixteen. He presented with acne and palmoplantar pustulosis associated with a right knee synovitis. Investigations revealed a major axial bone condensation. The association synovitis-acne-pustulosis-hyperostosis-osteitis leaded to the diagnosis of SAPHO syndrome associated with Crohn's disease.

Acne Vulgaris↗

[Sclerosing tufted angioma. Apropos of 4 cases involving lower limbs].

BACKGROUND: Tufted angioma belongs to the family of vascular skin proliferations. Clustered capillaries is the characteristic histological feature. Classically, tufted angioma is an acquired disease observed in children or young adults with lesions predominating on the neck, the shoulders and the upper trunk. CASE REPORTS: Four children were seen for flat skin lesions which were either initially or secondarily erythematous. The lesions were observed at birth or within the first weeks of life. In all 4 cases, the lesions progressed by infiltration, leading to sclerous plaques within a few weeks. The hip area was involved in case n(o) 2 and the thigh in the other cases. Pathology reported tufted angioma. A repeated biopsy 4 years after the first biopsy demonstrated the progressive nature of the fibrosis in case n(o) 2. Magnetic resonance imaging, performed in 3 of the 4 cases, demonstrated deep penetration of the vascular proliferation. The lesions were in contact with bony structures in case n(o) 2, reached the hypodermis in case n(o) 3 and infiltrated between the adducter muscles in case n(o) 4. DISCUSSION: Among tufted angiomas, there is a clinical variant characterized by very early discovery (congenital or within the first months of life), preferential localization on the lower limbs and progression to sclerosis. Although non-specific, hypersudation and lanuginous hypertrichosis are also highly suggestive signs. The main clinical and histological differential diagnosis is angio-eccrine hamartoma and, to a lesser degree, Kaposi hemangioendothelioma which does not predominate on the lower limbs. This particular clinical presentation of tufted angioma should lead to wide and sufficiently deep biopsy to allow precise diagnosis prior to initiating therapy. The possibility of spontaneous involution would allow abstention with regular surveillance to detect reactivation and progression or functional impairment. Such unfavorable progression has lead certain authors to propose high-dose systemic corticosteroid therapy or alpha-interferon.

Biopsy↗