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Biomedical subjects

K A Houston

Publications and source records attributed to K A Houston.

8 recordsLinked to original sources
PubMed2000

The genome sequence of Drosophila melanogaster.

The fly Drosophila melanogaster is one of the most intensively studied organisms in biology and serves as a model system for the investigation of many developmental and cellular processes common to higher eukaryotes, including humans. We have determined the nucleotide sequence of nearly all of the approximately 120-megabase euchromatic portion of the Drosophila genome using a whole-genome shotgun sequencing strategy supported by extensive clone-based sequence and a high-quality bacterial artificial chromosome physical map. Efforts are under way to close the remaining gaps; however, the sequence is of sufficient accuracy and contiguity to be declared substantially complete and to support an initial analysis of genome structure and preliminary gene annotation and interpretation. The genome encodes approximately 13,600 genes, somewhat fewer than the smaller Caenorhabditis elegans genome, but with comparable functional diversity.

Animals↗
PubMed1993

Incontinence and the older woman.

A vital message to convey to health care providers and to women who struggle with urinary incontinence is that female urinary problems may be significantly improved, reversed, or prevented by judicious application of current technologies. Control of female incontinence is particularly important in light of the aging trend and the need to prevent excess disability; therefore, any way in which women can be assisted in maintaining physical functioning, including voluntary control of urination, is important to avoid the dire physical and psychosocial consequences that accompany incontinence.

Adrenergic alpha-Agonists↗
PubMed1990

Tissue plasminogen activator reverses the deleterious effect of infection on colonic wound healing.

Fibrin deposition in response to bacterial peritonitis appears to predispose to residual infection in the peritoneal cavity. Our previous studies have demonstrated that intraperitoneal fibrinolysis using human recombinant tissue plasminogen activator (t-PA) prevented abscess formation in a rat intra-abdominal sepsis model. To investigate the potential adverse side effects of its use in the peritoneal cavity, the effect of t-PA on colonic anastomotic wound healing and on systemic coagulation parameters was examined in the rat. T-PA did not adversely affect colonic healing five and ten days after anastomosis. In animals infected intraperitoneally at the time of the anastomosis, t-PA reversed the inhibition of healing induced by perianastomotic abscesses at five days. This effect was mediated by the ability of t-PA to prevent perianastomotic abscess formation. After intraperitoneal administration, t-PA had no effect on prothrombin and partial thromboplastin times in either uninfected or infected animals and there was no evidence of clinical bleeding related to its use. These studies suggest that intraperitoneal fibrinolysis using t-PA may provide a safe, effective form of adjuvant therapy in the management of fibrinopurulent peritonitis.

Abscess↗
PubMed1988

Fibrin sealant in high-risk colonic anastomoses.

The use of fibrin sealant has been advocated to enhance the healing of high-risk intestinal anastomoses. Colonic anastomoses were performed in 162 rats randomly assigned to four groups: control animals with or without fibrin sealant applied to the anastomosis and steroid-treated animals with or without fibrin sealant. At five days postoperatively, the use of steroids alone significantly reduced the anastomotic bursting pressure (ABP) and enhanced abscess and adhesion formation. The addition of fibrin sealant to the anastomosis in steroid-treated animals did not improve ABP and, in fact, further increased abscess formation. In control animals, the use of fibrin sealant also reduced ABP and enhanced abscess and adhesion formation. By ten days, there was no difference in ABP among the groups, and the rate of abscess formation was reduced in all groups. These findings indicated that short-term treatment with steroids delayed colonic anastomotic healing. Fibrin sealant did not enhance the integrity of these high-risk anastomoses. The present data do not support the use of fibrin sealant in high-risk colonic anastomoses.

Abscess↗
PubMed1978

Behçet's disease associated with a lymphoproliferative disorder, mixed cryoglobulinemia, and an immune complex mediated vasculitis.

A woman, now 59 has been followed for 13 years with several manifestations of Behçet's disease. These were aphthous stomatitis, genital ulcers, uveitis causing blindness, recurrent erythema nodosum, and synovitis. In 1970 a poorly differentiated diffuse lymphocytic lymphoma appeared and was treated with radiotherapy. In 1976 she developed a mixed cryoglobulinemia and an immune complex mediated vasculitis manifested by purpura and neuropathy which improved on prednisone and chlorambucil therapy. The subsequent course of her lymphoproliferative disorder suggest that it was in fact benign.

Antigen-Antibody Complex↗