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Biomedical subjects

A Biegel

Publications and source records attributed to A Biegel.

11 recordsLinked to original sources
PubMed2006

The renal type H+/peptide symporter PEPT2: structure-affinity relationships.

The H(+)/peptide cotransporter PEPT2 is expressed in a variety of organs including kidney, lung, brain, mammary gland, and eye. PEPT2 substrates are di- and tripeptides as well as peptidomimetics, such as beta-lactam antibiotics. Due to the presence of PEPT2 at the bronchial epithelium, the aerosolic administration of peptide-like drugs might play a major role in future treatment of various pulmonary and systemic diseases. Moreover, PEPT2 has a significant influence on the in vivo disposition and half-life time of peptide-like drugs within the body, particularly in kidney and brain. PEPT2 is known to have similar but not identical structural requirements for substrate recognition and transport compared to PEPT1, its intestinal counterpart. In this review we compiled available affinity constants of 352 compounds, measured at different mammalian tissues and expression systems and compare the data whenever possible with those of PEPT1.

Dipeptides↗
PubMed1985

Defining scholarly activity in nursing education.

In an attempt to address the question of what activities should be considered scholarly, thereby warranting their inclusion in a nursing faculty evaluation model, a study was undertaken which surveyed all National League for Nursing accredited baccalaureate educational programs. The items in the instrument were generated utilizing the Delphi method and a pilot study established inter-respondent reliability. A response rate of 73% was attained. Scholarly activity was considered highly important in evaluation for promotion and tenure in over 50% of the schools. There were distinct differences in the activities deemed scholarly when respondents were broken down into categories such as size and type of institution and the existence or non-existence of graduate nursing programs in the same institution.

Colorado↗
PubMed1983

Serum immunoglobulins and uveitis.

Sixty-two percent of 975 uveitis patients had a statistically significant elevation in the levels of one or more of three serum immunoglobulins. The percentage of cases of above-normal values was greatest for IgM (43.8%), followed by IgA (34.0%), and then by IgG (11.9%). There was no statistically significant difference in immunoglobulin values obtained for one diagnosis as compared with all others, except for men with HLA-B27. They had a higher percent of elevated IgM values than men with all other diagnoses. Testing for immunoglobulins is of little or no value in the etiologic diagnosis of a single case of uveitis, but may be of value in research studies to better understand its pathogenesis.

Female↗
PubMed1979

Arthritis associated with jejunoileal bypass: clinical and immunologic evaluation.

Arthritis is a common complication of small bowel bypass, occurring in 5-20% of the postsurgical patients. Thirteen patients with arthritis related to jejunoileal bypass were studied. These patients had a symmetrical polyarthritis, and 8 also had extraarticular connective tissue disease manifestations. Immunologic evaluations were done on these patients and on a control group of 12 age- and sex-matched postintestinal bypass patients without arthritis. The incidence of positive ANA, rheumatoid factors, immune complexes, and antibodies to intestinal flora was the same in both groups. Patients in both groups showed similar changes in numbers of circulating T and B lymphocytes. More patients in the group with arthritis than in the control group had elevated IgA levels (38% versus 8%), but the difference was not significant (P less than 0.05). This study demonstrates that immunologic abnormalities occur after jejeunoileal bypass irrespective of the onset of arthritis or related symptoms. No specific immunologic abnormalities could be associated with the arthritis occurring after small bowel bypass.

Adult↗
PubMed1979

The human X-chromosome and the levels of serum immunoglobulin M.

The serum concentrations of immunoglobulins G, A and M were measured in a sample of 93 pairs of monozygotic twins, their spouses, and their offspring. The hypothesis that the human X-chromosome carries genes which control the levels of immunoglobulin M was tested with three different approaches. Our results indicate that environmental factors are primarily responsible for the observed variation in the levels of IgG and IgA. The variance of IgM seems to be mostly the result of X-linked gene effects, with women having higher IgM levels than men.

Female↗
PubMed1975

Vitiligo and dysgammaglobulinemia. A case report and family study.

This report concerns an 8 year old female with vitiligo and dysgammaglobulinemia characterized by absent IgA, very low IgG, and normal IgM. The t-cell immune system was intact but other family members had low levels or absence of IgA. The possible relationship of dysgammaglobulinemia and vitiligo is discussed along with the classification and inheritance of the immune cell defects.

Adolescent↗