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Biomedical subjects

J C Alonso

Publications and source records attributed to J C Alonso.

130 records · Page 8Linked to original sources

Bacillus subtilis homologous recombination: genes and products.

Homologous recombination plays a critical role in maintaining gene diversification and genome stability. Fourteen Bacillus subtilis recombination gene products have been genetically characterised and classified into five different epistatic groups. At least seven other recombination genes could be predicted. Recombination gene products which define activities that help RecA to process DNA repair and recombination have been studied, but those that processed recombination intermediates into products (post-synaptic stage) await elucidation.

Bacillus subtilis↗

[Graft viability of patients with renal transplantation from non heart beating donors].

INTRODUCTION: Renal transplantation (RT) is currently the treatment of choice in end-stage renal disease. The Gregorio Marañón hospital performed 65 RT, 97.01 pmp, this year. OBJECTIVE: To study the characteristics which RT patients from non-heart beating donors have in the immediate post-transplantation renogram. To know the evolution of the renal function, by renogram. METHODS: Ten patients with NHBD graft out of 65 patients with RT were studied in the year 2003. RESULTS: The study is made up of 10 patients with RT from NHBD, with an average timing of warm ischemia of 35 min and average timing of cool ischemia 21 h. In the post-transplantation renal function study, 9 of then showed hemodilution and one an acute tubular necrosis (ATN) pattern. In most of the cases, the study was performed the day after the RT except for one that was performed on the 4th day (1.7 +/- 1 days). Renal perfusion was conserved in every case. The renal graft maintained this type of record until post-RT day 7 (6.67 +/- 0.57 days) and evolved towards ATN after day 10 (11.65 +/- 1.5 days) and normal range on day 55 +/- 51.1 post-transplantation. All patients supported the graft, with acceptable renal function, except one of then who was treated with transplantectomy due to a renal venous thrombosis. CONCLUSION: The renal function study showed "hemodilution" in the first post-transplantation in 90 % of the RT from NHBD. Evolution went from ATN to normality. The NHBD are adequate for transplantation, significantly shortening the waiting time for RN.

Adult↗

Breast cancer detection with sestamibi-Tc-99m and Tl-201 radionuclides in patients with non conclusive mammography.

Early diagnosis of breast cancer using breast examination, mammography and ultrasonography is highly accurate, but radiologically dense breast represent a challenge for the mammographic detection of early stage tumors. The aim of this study is to determine the clinical value of scintigraphic techniques in the early diagnosis of breast cancer when other methods give non-conclusive results. The study includes 160 women with clinical suspicion of breast cancer and non-conclusive findings in mammography, randomized either to scintigraphic scans with Sestamibi Tc 99m or Tl 201. Up to date, 64 women have been enrolled, 46 in Tl-201 and 18 in Sestamibi Tc 99m. Results obtained show 73% sensitivity and 94% specificity with Tl 201 and 77% sensitivity and 100% specificity with Sestamibi Tc 99m. In this group, diagnostic accuracy improves when the tumors are bigger than two centimetres in diameter or when they are palpable. These preliminary results show that scintigraphic breast examination seems useful when other diagnostic methods provide non-conclusive results.

Breast Diseases↗