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Biomedical subjects

R Goodman

Publications and source records attributed to R Goodman.

At least 19 recordsLinked to original sources
PubMed1992

Transcription in Drosophila melanogaster salivary gland cells is altered following exposure to low-frequency electromagnetic fields: analysis of chromosome 3R.

The use of the transcription autoradiographic method permits identification of nascent RNA chains directly on identifiable regions of Drosophila salivary gland chromosomes. Changes in transcriptional activity at 13 defined regions of the right arm of chromosome 3 (3R) were observed following 20-min exposures of salivary glands to five different extremely low frequency (ELF) electromagnetic (EM) fields. Changes in translational patterns were also induced by the ELF EM fields in exposed cells. Differences included an increase in over-all polypeptide synthesis as well as in the number of polypeptides resolved in cells exposed to EM fields.

Animals↗
PubMed1991

Phospholipase A2 (PLA2) activity in bovine pulmonary artery endothelial cells.

We have investigated the role of recombinant human interleukin-1 beta (rIL-1 beta) and recombinant human tumor necrosis factor alpha (rTNF-alpha) on PLA2 activity, protein synthesis and eicosanoid production in bovine pulmonary artery endothelial cells. Cellular PLA2 activity increased 4-fold and production of PGE2 increased 3-fold at 1-2 hrs in the presence of 10 units/ml rIL-1 beta. PLA2 activity increased 3-fold at 30 min and PGE2 production increased 2-fold with 5 x 10(-9) M rTNF-alpha. The data show that endothelial cells respond more rapidly to rIL-1 beta (2-6 hr) and rTNF-alpha (30 min) than do chondrocytes and synovial cells (6-16 hrs), suggesting endothelial cells may play a primary role in initiating the inflammatory response.

Animals↗
PubMed1991

The use of progressive indicators as predictors of NCLEX-RN success and performance of BSN graduates.

Successful performance during the student's academic career contributes to his success on the NCLEX-RN. The purpose of this study was to determine predictors of success on the NCLEX preadmission and years 2, 3, and 4 variables in relation to NCLEX-RN scores. Data were obtained retrospectively from records of 408 baccalaureate nursing students. Preadmission variables were sex, age, race, and admission grade point average (GPA). Year 2 variables were numerical grades for the first two clinical nursing courses. Year 3 variables were numerical grades for clinical courses in mental health, adult health, and maternal child nursing. Year 4 variables were numerical grades in two senior clinical courses, percentile rank on NLN comprehensive exam, and graduate GPA. In NCLEX-RN scores, 67% of the variance was accounted for by admission GPA and race (33%), one 2nd year grade (an additional 14%), the 3rd year adult health grade (an additional 14%), the 3rd year adult health grade (an additional 11%), one 4th year theory grade, and the NLN comprehensive exam (an additional 9%). These results suggest that there are preadmission and sophomore year predictors of NCLEX-RN success which could be used to design early interventions for students performing poorly and at risk of failing the NCLEX-RN.

Achievement↗
PubMed1990

Delayed visual maturation and autism.

Three boys are described with a mixed developmental disorder, which so far appears to have a relatively good prognosis. Each boy presented in early infancy with visual unresponsiveness, which spontaneously resolved. This delayed visual maturation was accompanied or followed by severe autistic impairment, general developmental delay, hypotonia and clumsiness. Subsequent progress has been unexpectedly favourable, with striking improvements in language, play, social interest and social competence. Widespread, patchy delay in brain maturation could possibly account for this combination of delayed visual maturation and autism, with a good prognosis.

Autistic Disorder↗
PubMed1979

An evaluation of total nodal irradiation as treatment for stage III A Hodgkin's disease.

Between April 1969 and December 1974, 37 patients with surgically staged III A Hodgkin's disease were treated with total nodal irradiation (TNI). Their probability of relapse-free survival at 7 years is 51% and overall survival 82% with the majority of patients remaining disease free after retreatment with MOPP (10 of 16). In contrast, 21 stage III B patients treated with TNI and MOPP chemotherapy over the same time period have a relapse-free survival of 74% and overall survival of 91%. Because of superior results in treating stage III B patients with combined modality treatment, we fell that a relapse-free survival of 51% may not justify continuation of TNI as the only modality of treatment for patients with stage III A disease, and we have initiated a trial of combined radiation therapy and MOPP chemotherapy in these patients. The most effective treatment of stage III A Hodgkin's disease, however, remains uncertain and depends both on the ultimate risk of combined modality treatment and the success of retreatment following relapse after radiation.

Adolescent↗
PubMed1978

The significance of mediastinal involvement in early stage Hodgkin's disease.

Between April 1969, and December 1974, 111 consecutive surgically staged I A and II A patients with supradiaphragmatic Hodgkin's disease were treated at the Joint Center for Radiation Therapy. Patients received 3600--4400 rad to mantle and para-aortic--splenic pedicle regions. Median follow-up was 56 months (30--96). Fourteen patients developed relapsing Hodgkin's disease and three patients died of possible treatment-related causes, two with acute myocardial infarctions and one with radiation pneumonitis. Patients with mediastinal enlargement greater than one third of the chest diameter have a significantly higher risk (p less than 0.01) of developing relapse (9 of 18) than patients with lesser or no mediastinal disease (5 of 93). Of the 18 patients with large mediastinal disease, six relapsed in the mediastinum and two in the lung. There continue to be no pelvic extensions in the entire group. There is a 92% relapse-free and 97% overall survival in the 93 patients without extensive mediastinal disease. We continue to recommend mantle and para-aortic--splenic pedicle irradiation for these patients. In view of the large number of relapses in patients with extensive mediastinal disease, we are now treating this subgroup of patients with MOPP chemotherapy in addition to mantle and para-aortic irradiation.

Adolescent↗
PubMed1978

Nerve growth factor-mediated induction of tyrosine hydroxylase in a clonal pheochromocytoma cell line.

We have established a clonal cell line, PC-G2, from an experimentally induced rat pheochromocytoma. Administration of nerve growth factor to PC-G2 causes a 4- to 8-fold induction in the specific activity of tyrosine hydroxylase [tyrosine 3-monooxygenase; L-tyrosine,tetrahydropteridine:oxygen oxidoreductase(3-hydroxylating); EC 1.14.16.2]. The response is elicited in a dose-dependent fashion, at concentrations above 0.1 microgram/ml. Antiserum to nerve growth factor inhibited the induction of tyrosine hydroxylase. Dexamethasone enhances the nerve growth factor-mediated elevation of tyrosine hydroxylase. After 3--4 days of exposure to nerve growth factor the maximal induction of tyrosine hydroxylase is seen, although a significant increase can be observed after 24 hr. In contrast to the PC-12 cell line (derived from the same tumor), in which neurite outgrowth occurs in response to nerve growth factor, there is no morphological change or alteration in growth rate of PC-G2 cells after exposure to nerve growth factor.

Cell Line↗
PubMed1978

Glucocorticoid induction of tyrosine hydroxylase in a continous cell line of rat pheochromocytoma.

We have established a continous cell line (G1) in which the tyrosine hydroxylase specific activity is increased as much as 50-100-fold in response to dexamethasone. This response is specific for the glucocorticoid class of steroid hormones; it is elicited by dexamethasone, corticosterone, and triamcinolone, but not by estradiol, testosterone, progesterone, or deoxycorticosterone acetate. The increase in tyrosine hydroxylase specific activity is likely to be due to the increased synthesis of new enzyme protein rather than an activation of existing protein molecules, inasmuch as this increase is completely blocked by cycloheximide.

Adrenal Gland Neoplasms↗
PubMed1977

Stages I--III Hodgkin's disease in children: results of staging and treatment.

Fifty-two children with clinical stages I-III Hodgkin's disease were evaluated for disease extent between April 1969 and March 1975. All underwent laparotomy and splenectomy. Two patients with liver involvement were excluded. Thirty of 31 patients with pathologically staged IA-IIA disease have been continuous complete remission after mantle and para-aortic irradiation. There have been no extensions into the untreated pelvis. Fourteen of 15 patients with pathologic stages IIB and IIIB disease show no evidence of relapse after TNI and MOPP. Three of four patients with stage IIIA disease developed nodal relapse after irradiation; all are alive without evidence of disease after re-irradiation (3) and MOPP (2). Thus 45 of 50 patients (90%) have remained continuously free of disease after completion of the planned treatment, and overall 49 of 50 (98%) are alive, without evidence of disease. Such results justify continuation of our staging and treatment philosophy in children with Hodgkin's disease.

Adolescent↗
PubMed1977

Stages IIB and IIIB Hodgkin's disease. Results of combined modality treatment.

Between April 1969, and December 1974, 23 IIB and 26 IIIB surgically staged patients with Hodgkin's disease were treated at the Joint Center for Radiation Therapy. Stage IIB patients received either mantle and para-aortic-splenic pedicle, or total modal irradiation (TNI) alone or with the addition of combination chemotherapy. Relapse-free survival is 83% and overall survival 88%. Eleven patients received combination chemotherapy in addition to mantle and para-aortic irradiation, and both the relapse-free and overall survival are 100%. Of the stage IIIB patients, seven received TNI alone with four relapses, and 19 were treated with TNI and MOPP with two relapses. These relapse rates are significantly different (p less than 0.05). The relapse-free and overall survival for all stage IIIB patients is 66% and 84% respectively. These data imply that irradiation alone is not adequate treatment for stage IIIB Hodgkin's disease, and that with the addition of combination chemotherapy both the disease-free and overall survival is similar to that of early stage Hodgkin's disease without systemic symptoms. The ideal management of stage IIB Hodgkin's disease is less certain; it is our plan to study the efficacy of combined modality treatment.

Adolescent↗
PubMed1977

Hematopoietic stem cells: effect of preirradiation, bleeding, and erythropoietin on thrombopoietic differentiation.

A method of measuring differentiation of stem cells towards platelets is described using syngeneic bone marrow injected into lethally irradiated mice. Fourteen days after such injection, the platelet counts are found to be proportional to the number of bone marrow cells injected and can be used as a measure of platelet progenitors. Perturbation of the milieu in which the transplanted marrow is placed by host preirradiation, bleeding, or erythropoietin administration leads to enhanced thrombopoiesis. It has been shown previously that similar perturbation favors erythropoiesis at the expense of granulopoiesis. The data from these and other experiments appear to be consistent, with a model of the stem cell compartment as a continuum with proliferative activity increasing as commitment is restricted. These functions vary inversely with the capacity for self-renewal. The various stem cell assays measure different ranges of stem cells, but overlap within this continuum.

Animals↗
PubMed1976

Herpes zoster in children with stage I-III Hodgkin's disease.

Herpes zoster infection developed in 12 (52%) of 23 children with Stage I-III Hodgkin's disease but had no prognostic significance. Of these 23 patients, 22 are presently alive without evidence of active Hodgkin's disease. The authors conclude that a combination of factors is important in the high incidence of herpes zoster, including more aggressive staging as well as more aggressive irradiation and chemotherapy, and that the results in their series would seem to justify continuation of this approach to staging and treatment in such cases.

Adolescent↗