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Biomedical subjects

D E Moore

Publications and source records attributed to D E Moore.

At least 19 recordsLinked to original sources

Hydrostatic pulmonary edema in sheep. Effects of bronchial artery embolization on the plain chest radiograph.

RATIONALE AND OBJECTIVES: The bronchial circulation may influence pulmonary edema. This study evaluates possible effects of bronchoesophageal artery embolization on the plain film manifestations of hydrostatic pulmonary edema in sheep. METHODS: Anteroposterior and lateral chest radiographs were obtained during the induction of pulmonary edema both before and after embolization of the bronchoesophageal artery in six adult sheep. Interstitial lines and perivascular, segmental bronchial, proximal bronchial, carinal, tracheal, and parenchymal edema were evaluated. RESULTS: Only parenchymal edema was graded consistently. Though edema increased with left atrial pressure before embolization (P < .001), there was no similar change afterward. The embolized animals tended to be more edematous by the first film. CONCLUSION: Rather than any protective effect, bronchoesophageal artery embolization may increase edema. This model may be inappropriate for further investigation of the bronchial circulation in the development of human pulmonary edema.

Animals

Local control of subcutaneous murine melanoma xenografts in nude mice by neutron capture therapy.

The systemic administration of enriched [10B]D,L-p-boronophenylalanine results in the selective uptake of boron by Harding-Passey melanoma xenografts in the nude mouse model. The boron-10 located in the tumour cells acts as a radiation sensitizer for thermal neutron irradiation. The nude mouse model can be successfully used to demonstrate that regression and local control of melanoma can be achieved by neutron capture therapy. Control is a manifestation of the high linear energy transfer radiation released after neutron capture by boron-10, and does not result from an equal fluence of neutrons alone. Histological examination of remnant tumour beds 300 days after treatment shows the presence of isolated melanoma cells. However, these cells are few in number and appear incapable of division.

Animals

Early luteal progesterone supplementation during in vitro fertilization cycles. A randomized trial.

The effects of early luteal phase progesterone (P) supplementation were studied in women with endogenous serum P levels less than or equal to 12 ng/mL prior to embryo transfer. From a total of 129 cycles that received the same ovarian hyperstimulation protocol, 72 cycles were characterized by levels less than 12 ng/mL on the day prior to embryo transfer. Of those women, 42 (group B) were started on P supplementation one day prior to embryo transfer, and 30 (group C) were started according to the standard protocol after embryo transfer. The clinical course and outcomes in both groups were compared with 57 cycles that had P levels greater than or equal to 12 ng/mL (group A). The early P supplementation in group B resulted in a transient increase in P levels on the morning of embryo transfer as compared with group C. It did not, however, approach the levels seen in group A, which had higher P levels from the early luteal phase through embryo transfer and more favorable oocyte recovery, fertilization and cleavage rates. We were unable to improve the clinical outcome in group B as compared with group C by providing earlier P supplementation.

Adult

Medical treatment of endometriosis: a comparison of the suppressive effects of danazol and nafarelin on reproductive hormones.

OBJECTIVE: Patients with endometriosis were studied to investigate hormonal suppression by the gonadotropin-releasing hormone against nafarelin acetate compared with danazol. We hypothesized that the pattern, time course, and degree of gonadotropin and ovarian suppression would be different. DESIGN: The study included 16 patients who were randomized into one of three 6-month treatment protocols. SETTING: Patients were recruited from a university hospital setting. PATIENTS: Eligible candidates were 18 to 45 years of age, with regular menses and documented pelvic endometriosis. INTERVENTION: Six-month treatment protocols included nafarelin 800 or 400 micrograms/d, or danazol 800 mg/d. MAIN OUTCOME MEASURES: Serum estradiol (E2), progesterone (P), luteinizing hormone (LH), and follicle-stimulating hormone were determined before treatment and then monthly. Thirteen patients consented to a 12-hour hospital admission during the 5th and 6th month of treatment to determine LH pulse frequency and amplitude. RESULTS: Estradiol and P were suppressed in all groups, but E2 significantly more by nafarelin than danazol (P less than or equal to 0.01). Nafarelin, 800 micrograms, significantly depressed LH pulse amplitude compared with danazol (P less than or equal to 0.05). Two patients in the nafarelin group had the administration of their medication observed, and both demonstrated single, high-amplitude pulses immediately after administration. CONCLUSION: Nafarelin is a more potent LH and E2 suppressor than danazol, and the agonist effect of nafarelin may continue to provoke transient gonadotropin responses despite long-term therapeutic suppression.

Adult

Comparison of nonionic and ionic contrast agents in the rabbit lung.

The objective of this study was to determine the short- and long-term radiographic, physiologic and histologic changes elicited in the lung of rabbits following the aspiration of commonly used radiographic contrast agents. All agents used, including nonionic agents, caused radiographically evident pulmonary edema which cleared by 24 hours. The contrast materials with higher osmolality, viscosity, and iodine content elicited the greatest physiologic and pathologic changes. No differences were found between an ionic and a nonionic agent with similar viscosities and iodine content, despite a lower osmolality in the nonionic agent. No contrast agent is innocuous when introduced into the lung.

Animals

Selective fallopian tube canalization.

Infertility is an increasingly common problem. Occlusion of the fallopian tubes is one of the principal causes, and until recently surgery was the only available treatment. The success rate of surgery is often low, particularly with occlusion of the proximal tube. Selective fallopian tube canalization under fluoroscopic guidance has been successful in alleviating proximal tubal obstruction. This procedure may be performed in the outpatient setting and is a safe, cost-effective alternative to surgery.

Adult

Liquid chromatography with amperometric detection for the determination of non-steroidal anti-inflammatory drugs in plasma.

A simple and sensitive liquid chromatographic method with electrochemical detection is described for the quantitative determination of the non-steroidal anti-inflammatory drugs diflunisal, indomethacin, naproxen, piroxicam and sulindac in human plasma. Isolation of the drug from the biological fluid is achieved using a Sep-pak RP18 cartridge. Separation of plasma components occurs on a reversed-phase C18 column with a mobile phase consisting of methanol-water-phosphate buffer. For the amperometric detection the potential of +0.9 V was set on the working electrode. The detection limit of the assay is 10-20 ng/ml. The method showed good concordance for plasma samples containing the drugs (r = 0.999) and can be readily utilized for clinical pharmacokinetic studies.

Anti-Inflammatory Agents, Non-Steroidal

A review of techniques for the analysis of boron in the development of neutron capture therapy agents.

The resurgence of interest in neutron capture therapy, which uses boron-10 labelled compounds and neutron irradiation as a technique for the treatment of cancer, has been accompanied by the application of a new generation of techniques for the analysis and imaging of boron in biological matrices. In this review, a description is given of the requirements for boron neutron capture agents and the achievements to date of the analytical techniques.

Animals

Selective fallopian tube cannulation: initial experience in an infertile population.

We have studied a group of 19 patients presenting with proximal tubal occlusion. Seventy-three percent (22/30) of tubes attempted were successfully cannulated. Sixty-two percent (5/8) of tubes remained patent in limited follow-up at 3 to 6 months. We conclude that selective fallopian tube cannulation may provide an alternative to microsurgical tubal anastomosis in selected patients.

Catheterization

Endometrial histopathology in patients with culture-proved upper genital tract infection and laparoscopically diagnosed acute salpingitis.

To define and quantitate histologic changes in the endometrium that best correlate with documented upper genital tract infection (UGTI) and laparoscopically diagnosed acute salpingitis, we studied endometrial biopsy specimens from 69 consecutive patients with clinically suspected acute pelvic inflammatory disease (PID) who underwent microbiological evaluation for UGTI and laparoscopic examination for acute salpingitis. Both UGTI and acute laparoscopically confirmed salpingitis were present in 37 patients (54%), UGTI without salpingitis in 1 (1%), salpingitis without UGTI in 11 (16%), and neither UGTI nor salpingitis in 20 (29%). Chlamydia trachomatis or Neisseria gonorrhoeae UGTI was found in 34 women, Escherichia coli in two patients, Peptococcus magnus in one woman, and with Streptococcus agalactiae in one woman. The following features were correlated both with UGTI and with salpingitis: presence of any neutrophils in the endometrial surface epithelium; neutrophils within gland lumens; dense subepithelial stromal lymphocytic infiltration; any stromal plasma cells; and germinal centers containing transformed lymphocytes. The simultaneous presence of five or more neutrophils per X 400 field in endometrial surface epithelium, together with one or more plasma cell per X 120 field in endometrial stroma, was the best predictor of UGTI plus salpingitis. This combination had a sensitivity of 92% and a specificity of 87% for predicting the diagnosis of both UGTI and laparoscopically confirmable acute salpingitis. Prospective studies are needed to assess the usefulness of these criteria.

Acute Disease

Recreational drug use and the risk of primary infertility.

Recreational drug (marijuana, lysergic acid diethylamide or LSD, speed, cocaine, and "other") exposures of women with primary infertility were compared with those of a matched control group of women with proven fertility. Women who reported smoking marijuana had a slightly elevated risk for infertility due to an ovulatory abnormality (RR = 1.7, 95% CI = 1.0 to 3.0). The risk was greatest among women who had used marijuana within one year of trying to become pregnant (RR = 2.1, 95% CI = 1.1 to 4.0). No consistent frequency or duration of use effects could be demonstrated, and the risk was confined to low-frequency users. Risks associated with the use of other drugs were not elevated. The risk of infertility from a tubal abnormality associated with cocaine use was greatly increased (RR = 11.1, 95% CI = 1.7 to 70.8). Our results are consistent with animal studies suggesting that smoking marijuana may cause a transient disruption of ovulatory function. The possibility that cocaine exposure influences the development of tubal infertility needs further investigation.

Adult

Oligohydramnios associated with prostaglandin synthetase inhibitors in preterm labour.

The use of prostaglandin synthetase inhibitors (indomethacin and ibuprofen) for greater than 72 h in women with preterm labour (n = 67) was significantly (P less than 0.001) associated with ultrasound-recorded oligohydramnios compared with the use of ritodrine or magnesium sulphate (control group, n = 67). Oligohydramnios developed in 26 of 37 women (70%) treated with indomethacin and 8 of 30 women treated with ibuprofen (27%) (P less than 0.01). Oligohydramnios developed in only two control subjects and one of these pregnancies was associated with intrauterine growth retardation. All 34 cases of oligohydramnios in the treatment group resolved after stopping medication, whereas the two in the control group did not resolve. No instances of renal failure, premature closure of the ductus arteriosus, pulmonary hypertension, or bleeding disorders were noted in any of the treated or control infants.

Adult

Photochemical studies on the anti-inflammatory drug diclofenac.

Irradiation with UVA light of the anti-inflammatory drug diclofenac [2-(2,6-dichloroanilino)phenylacetic acid] in aqueous buffer or methanol solution leads to sequential loss of both chlorine substituents and ring closure to carbazole-1-acetic acid as the major product. Minor products result from substitution by the solvent. The photosensitizing properties of diclofenac and its major photoproduct were tested with singlet oxygen substrates and in the free radical polymerization of acrylamide. Although the major carbazole product is a weakly phototoxic agent, able to generate singlet oxygen more efficiently than diclofenac, the free radical photodechlorination process is postulated as the probable initiation step of in vivo photosensitivity responses.

Diclofenac

Effects of contrast agents on the fallopian tube in a rabbit model.

The authors evaluated the effect of different iodinated contrast agents on the fallopian tube and adnexal tissue in 15 rabbits. Ethiodized oil, an oil-soluble agent, was used in five rabbits. The following water-soluble agents were used: iothalamate meglumine 30% (n = 3), iothalamate meglumine 60% (n = 3), and ioxilan (n = 4). The agents were injected through catheters placed in the fallopian tubes. Fallopian tubes and peritoneal cavities were histologically evaluated. The contralateral tube served as a control. Ioxilan and iothalamate meglumine 30% produced no pathologic response in the tube or peritoneal cavity. Iothalamate meglumine 60% was associated with mild inflammatory infiltrate, mucosal edema, giant cell reaction, and periovarian adhesions that were bilateral but more pronounced on the injected side. Use of ethiodized oil resulted in papillary fibrous adhesions on the ovarian surface, and fat granulomas were seen in the periovarian tissues. The safety of oil-based contrast agents for use in hysterosalpingography is therefore questioned. No significant differences were found among the water-soluble contrast agents.

Adnexa Uteri

Occupational careers and mortality of elderly men.

This article presents findings from an analysis of occupational differentials in mortality among a cohort of males aged 55 years and older in the United States for the period 1966-1983. Using the National Longitudinal Survey of Mature Men, we construct event histories for 3,080 respondents who reach the exact age of 55. The dynamics that characterize socioeconomic differentials in mortality are analyzed by evaluating the differential effects of occupation over the career cycle. Maximum likelihood estimates of hazard-model parameters show that the mortality of current or last occupation differs substantially from that of longest occupation, controlling for education, income, health status, and other sociodemographic factors. In particular, the rate of mortality is reduced by the substantive complexity of the longest occupation while social skills and physical and environmental demands of the latest occupation lower mortality.

Aged

Transmission of genital herpes by donor insemination.

This report describes a donor in a therapeutic donor insemination program who asymptomatically acquired a primary herpes simplex virus type 2 (HSV-2) infection from his long-standing sexual partner. His fresh semen was used to inseminate two HSV-seronegative recipients; in one a primary HSV-2 infection developed, and in one it did not. Direct evidence of transmission from donor to recipient was documented by restriction enzyme analysis of the HSV-2 isolates obtained from the donor's semen and from the recipient's cervix. Because of the possibility of asymptomatic acquisition and transmission of HSV-2, semen donors and their sexual partners should undergo serologic screening for genital herpes using new, type-specific HSV serologic techniques.

Adult