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Biomedical subjects

C Gaudy

Publications and source records attributed to C Gaudy.

7 recordsLinked to original sources
PubMed2006

Multiple senile lentigos of the face, a skin ageing pattern resulting from a life excess of intermittent sun exposure in dark-skinned caucasians: a case-control study.

BACKGROUND: Different patterns of skin ageing can be described depending on the predominant lesions, i.e. wrinkles, laxity, atrophy, senile lentigos (SLs), etc. They may correspond to different epidemiological contexts. OBJECTIVES: To identify and assess the epidemiological factors for a skin ageing pattern characterized by a high density of SLs on the face, or 'lentigo ageing pattern' (LAP). METHODS: An age- and sex-matched case-control study was conducted in individuals aged between 60 and 80 years, comparing cases (n = 118) with a very high number of SLs on the face for their age, and controls (n = 118) with no or very few SLs for their age. The cases and controls were recruited in two hospitals. RESULTS: In univariate and multivariate analysis, LAP was associated with skin types III and IV, with frequent sunburns, and with the part of the lifetime cumulative sun exposure which was received during vacations. Conversely, there was no link with the occupational and everyday exposures and the total cumulative exposure. LAP was associated with multiple solar lentigos of the upper back. No relationship was found with postmenopausal hormonal therapy, number of naevi, or freckles. CONCLUSIONS: Different epidemiological factors may account for the different skin ageing patterns. LAP seems to develop preferentially in dark-skinned caucasians who have repeatedly received intermittent and intense sun irradiations throughout their life, and have often developed solar lentigos on the upper back earlier in life, whereas the 'prominent wrinkling' pattern is known to affect light-skinned people and smokers with a life excess of continuous exposure.

Aged↗
PubMed2004

[Mutation analysis of ISDR and V3 domains of hepatitis C virus NS5A region before interferon therapy with or without ribavirin].

AIM OF THE STUDY: The hepatitis C virus (HCV) non-structural NS5A protein has been controversially implicated in the resistance of HCV to interferon therapy in clinical studies. In Japan, mutations in the interferon sensitivity-determining region (ISDR) in the NS5A gene were associated with response to interferon therapy in patients infected with genotype 1b. In contrast, studies from Europe did not confirm such association. More recently, it has been suggested that the V3 domain outside the putative ISDR might also have amino acids changes that may be involved in the resistance to IFN. In this study, the relationship between NS5A mutations in ISDR and V3 domains and virological response to therapy were investigated. MATERIALS AND METHODS: The NS5A gene was sequenced from 35 HCV genotype 1b infected patients at D0 of a prospective clinical trial of interferon therapy and interferon plus Ribavirin combination therapy. RESULTS: In the ISDR domain, we did not observe any significant differences in amino acids changes between responders (1.7 +/- 1.8, n = 19, range 0-6) and non-responders (1.1 +/- 0.8, n = 14, range: 0-3), (P = 0.483), to therapy before the beginning of treatment. In the V3 domain, we found more mutations in responders (6.5 +/- 1.9, range: 2-11) than in non-responders (4.7 +/- 1.2, range: 3-8) (P = 0.0013), before the beginning of treatment. CONCLUSION: Our results confirm that, in Europe, the ISDR domain is not predictive for treatment success but suggest that the V3 domain have greater variability in responders than non-responders.

Amino Acid Sequence↗
PubMed2001

[Psychological and behavioral disorders with good outcome in neurosarcoidosis].

INTRODUCTION: Neurological involvement is observed in 5% of cases of sarcoidosis and includes impairment of the central nervous system, the meninges, and the cranial and peripheral nerves. Besides neurological defects, cognitive impairment may be encountered ranging from isolated memory defect to dementia. EXEGESIS: We report a case of neurosarcoidosis occurring in a 40-year-old woman, a native of Reunion Island, with initial meningeal and hypophyseal involvement. Three years later, while treated with low dose prednisolone and methotrexate, she presented a paranoid state associated with cognitive impairment of frontal type and severe behavioral disturbances. After 2 years of high dose steroid treatment associated with hydroxychloroquine, her behavioral status improved, allowing social and familial reinsertion. CONCLUSION: In our observation, sarcoidosis was revealed through a central neurological impairment, with chronic meningitis, facial nerve palsy, and, finally, through psychiatric symptoms and severe behavioral disturbances. A slow favorable outcome was obtained using high dose methylprednisolone and hydroxychloroquine with total regression of behavioral disturbances but with persisting cognitive alteration.

Adult↗
PubMed1992

Lactococcus lactis release from calcium alginate beads.

Cell release during milk fermentation by Lactococcus lactis immobilized in calcium alginate beads was examined. Numbers of free cells in the milk gradually increased from 1 x 10(6) to 3 x 10(7) CFU/ml upon successive reutilization of the beads. Rinsing the beads between fermentations did not influence the numbers of free cells in the milk. Cell release was not affected by initial cell density within the beads or by alginate concentration, although higher acidification rates were achieved with increased cell loading. Coating alginate beads with poly-L-lysine (PLL) did not significantly reduce the release of cells during five consecutive fermentations. A double coating of PLL and alginate reduced cell release by a factor of approximately 50. However, acidification of milk with beads having the PLL-alginate coating was slower than that with uncoated beads. Immersing the beads in ethanol to kill cells on the periphery reduced cell release, but acidification activity was maintained. Dipping the beads in aluminum nitrate or a hot CaCl2 solution was not as effective as dipping them in ethanol. Ethanol treatment or heating of the beads appears to be a promising method for maintaining acidification activity while minimizing viable cell release due to loosely entrapped cells near the surface of the alginate beads.

Alginates↗
PubMedDate not supplied

[Treatment of Hailey-Hailey disease with carbon dioxide laser vaporization].

INTRODUCTION: Only ablative methods lead to long term remission of areas affected by Hailey-Hailey disease: excision/skin graft, cryosurgery, dermabrasion... The method using the CO2 laser is a recent addition in the management of this dermatitis. We report our experience with this technique in 4 patients. PATIENTS AND METHODS: Carbon dioxide laser vaporization was proposed to 4 patients exhibiting Hailey-Hailey disease resistant to classical treatments. A test under local anesthesia was performed beforehand in all the patients. A 60 year-old man had an immediate reaction and refused to continue treatment. In the other 3 cases, the result of the test at 6 months was considered satisfactory. These patients were treated under general anesthesia in a single area of 50 to 70 cm2, and a half-body for comparison. The CO2 laser was used in pulse mode, with successive irradiations, until a homogenous, whitish-yellow aspect with first retraction was obtained. RESULTS: Although the healing delays were long (a mean of 1 month) and required major analgesics over the first few days, the cosmetic results were satisfactory and no abnormal scarring was observed. After a median follow-up of 27 months, no relapse of the disease other than punctiform elements was noted. All the patients wanted treatment of the other remaining affected areas be continued. In 2 patients, CO2 laser vaporization permitted treatment of areas not easily accessible to other ablative methods (around the mouth, the anus and the vulva) with anatomy and normal function spared. DISCUSSION: These results are globally good. Although the time to healing was long, the cosmetic and functional results were always satisfactory, without abnormal scarring. Moreover, in 2 of the patients, CO2 laser was able to treat areas inaccessible to other methods. The reason for the efficacy of ablative methods is debated. Re-epidermization with keratinocytes of appendices and not expressing the molecular defect, and the constitution of dermal cicatricial tissue, are two currently proposed hypotheses.

Adult↗
PubMedDate not supplied

Severe lower limbs lymphedema following breast carcinoma treatment revealing radiation-induced constrictive pericarditis--a case report.

In patients treated for breast carcinoma, unilateral lymphedema of the upper limb is usual. However, to the authors' knowledge, lower limb lymphedema has never been reported as a complication of breast carcinoma therapy. They report here the first case of a radiation-induced constrictive pericarditis revealed by severe lower limbs lymphedema. A 60-year-old woman was treated for left breast carcinoma with quadrantectomy, axillary lymphadenectomy, and combined radio chemotherapy (60 grays). Three and a half years later she suffered from a diffuse and increasing lower limbs lymphedema, which became huge and disabling. Radiation-induced constrictive pericarditis was evidenced by right cardiac cavities catheterization. A dramatic improvement was rapidly obtained after pericardectomy. Histopathologic analysis of the pericardium did not reveal neoplastic cells. Radiation-induced constrictive pericarditis is usually responsible for lower limbs edema, but lymphedema is exceptional. This case highlights the need to search for a constrictive pericarditis also in the case of lower limbs lymphedema, particularly in a patient treated with mediastinal radiotherapy or combined radio chemotherapy.

Antineoplastic Combined Chemotherapy Protocols↗