Biomedical subjects

Juan Carlos Martinez

Publications and source records attributed to Juan Carlos Martinez.

3 recordsLinked to original sources

PubMed2006

Reconstructive treatment for antiretroviral-associated facial lipoatrophy: a prospective study comparing autologous fat and synthetic substances.

Lipodystrophy is one of the foremost concerns among the HIV-positive population, and is often associated with psychosocial disorders. We evaluated the clinical efficacy of facial infiltrations with autologous fat, polylactic acid, and polyacrylamide gel using clinical inspection and facial photographs (ordinal scale). Additionally, we assessed the safety of the infiltration techniques and determined changes in patient satisfaction, emotional status, and quality of life. Evaluations were made at 48- and 96-week follow-up visits. This paper presents the 48- week follow-up results. The current analysis includes 138 patients: 8, 25, and 105 in the fat, polylactic acid, and polyacrylamide gel groups, respectively. At baseline, almost 50% of the patients (67/138) presented grades 3 and 4 lipoatrophy, but at week 48 only 7.5% (7/93) remained in these advanced grades (no patients from the polyacrylamide group). A new round of infiltrations at week 48 was necessary in 35% (33/93) of patients (88%, 84%, and 8% in the fat, polylactic, and polyacrylamide groups, respectively). No serious adverse events were detected with any of the substances. Patient satisfaction and quality of life improved significantly in all three groups. Infiltrations with autologous fat, polylactic acid, or polyacrylamide gel appear to be an effective and safe alternative to repair facial lipoatrophy, at least up to 48 weeks, significantly improving patient quality of life. Similar results were observed for all degrees of severity and between genders. Polyacrylamide gel provided the longest lasting benefits.

Acrylic Resins↗

PubMed2005

Improved cotyledonary node method using an alternative explant derived from mature seed for efficient Agrobacterium-mediated soybean transformation.

The utility of transformation for soybean improvement requires an efficient system for production of stable transgenic lines. We describe here an improved cotyledonary node method using an alternative explant for Agrobacterium tumefaciens-mediated soybean transformation. We use the term "half-seed" to refer to this alternative cotyledonary explant that is derived from mature seed of soybean following an overnight imbibition and to distinguish it from cotyledonary node derived from 5-7-day-old seedlings. Transformation efficiencies using half-seed explants ranged between 1.4 and 8.7% with an overall efficiency of 3.8% based on the number of transformed events that have been confirmed in the T1 generation by phenotypic assay using the herbicide Liberty (active ingredient glufosinate) and by Southern analysis. This efficiency is 1.5-fold higher than the cotyledonary node method used in our laboratory. Significantly, the half-seed system is simple and does not require deliberate wounding of explants, which is a critical and technically demanding step in the cotyledonary node method.

Benzyl Compounds↗

PubMed2004

In-transit metastasis from primary cutaneous squamous cell carcinoma in organ transplant recipients and nonimmunosuppressed patients: clinical characteristics, management, and outcome in a series of 21 patients.

BACKGROUND: In-transit metastases from cutaneous squamous cell carcinoma (SCC) may occur in organ transplant recipients and may indicate aggressive disease and poor prognosis. OBJECTIVE: The objective of this study was to describe in-transit metastases from cutaneous SCC and to identify factors associated with this phenomenon in a series of 21 patients. We also attempted to evaluate outcome with respect to status as an organ transplant recipient or nonorgan transplant recipient. METHODS: A multicenter case series of patients was reviewed; factors included clinical presentation, management, and outcome. RESULTS: Twenty-one patients, 15 organ transplant recipients, and 6 nontransplant recipients with in-transit metastases were reviewed. In-transit metastases presented most commonly as discrete, dermal papules distinct from but in the vicinity of the primary tumor site. Histologic differentiation was variable. At a mean follow up of 24 months, 33% the transplant patients had no evidence of disease compared with 80% of nontransplant patients. Thirty-three percent were dead from disease and 33% were alive with nodal or distant metastases. In contrast, 80% of nonimmunosuppressed patients had no evidence of disease and none had died at mean follow-up of 24 months. CONCLUSION: In-transit metastasis from cutaneous SCC is a unique presentation of metastatic SCC, more commonly described in organ transplant recipients, and is associated with poor prognosis in that group. This description represents the largest experience with in-transit metastases from cutaneous SCC in the literature.

Adult↗