Unconjugated steroids in the fallopian tube and peripheral blood during the normal menstrual cycle

Daily plasma samples were obtained from 22 high-parity normal women beginning on day 9 of the menstrual cycle. At varying times in the cycle, salpingectomy was performed and the excised tube was divided into isthmic, ampullary, and fimbrial segments. Simultaneous determinations of 17 beta-estradiol (E2), estrone (E1), and progesterone (P) in plasma and tubal tissue were carried out by specific radioimmunoassay. The highest ratio for E2 tissue to E2 plasma was seen at the time of the E2 peak. The E2 concentrations in the three anatomical segments of the fallopian tube during the late proliferative phase were significantly (P less than 0.05) higher than those during the early proliferative and late postovulatory periods. A significant (P less than 0.05) increase in P concentration was seen in both plasma and oviductal tissue after ovulation. The tubal tissue to plasma ratio had a tendency to decrease during the secretory phase, indicating a limited uptake of P during the secretory phase. The plasma levels of esterone were almost constant during the normal menstrual cycle. The highest concentration of E1 was seen in the fimbriae (254 +/- 71 pg/gm and ampulla (326 +/- 75 pg/gm during the early secretory phase of the cycle. The possible role of E1 during this crucial time of oviductal physiology is considered.

Cigarette smoke inhalation studies in inbred Syrian golden hamsters

Invasive carcinoma of the larynx was induced in 36.8% of inbred Syrian golden hamsters from strain B10 15.16, susceptible to this type of cancer when exposed to smoke from reference filter cigarettes for 59-80 weeks. Nearly half the animals (47.4%) showed laryngeal cancer, including noninvasive carcinoma and carcinoma in situ, which occurred with daily smoke exposures (twice a day for 12 min each time, for 27 sec out of each min) 7 days a week at smoke concentrations of 22%. When the smoke concentration was reduced to 11%, the number of induced lesions was reduced proprotionately. When a portion of tobacco was replaced in the cigarettes by a tobacco supplement, Cytrel (a trademark of the Celanese Corp., Charlotte, N.C.), a reduction of carcinogenesis proportionate to the Cytrel content of the cigarette took place. Smoke from cigarettes containing only Cytrel and no tobacco induced no carcinomas under the conditions used. Other dose-related changes observed were laryngeal papillomas, laryngeal epithelial hyperplasia, tracheal epithelial hyperplasia, and metaplasia and accumulation of alveolar macrophages. Tar deposition in lungs and accumulation of alveolar macrophages. Tar deposition in lungs and larynges was determined in a separate study by means of a marker, decachlorobiphenyl, added to the cigarettes. Admixture of Cytrel to cigarettes reduced tar deposition in the respiratory tract, which paralleled the decrease in the incidence of laryngeal carcinoma. However, the amounts of tar deposited in the larynx when 100% Cytrel was smoked were still significant, even though no carcinomas were observed. Thus smoke from Cytrel tobacco supplement may be less carcinogenic than equal amounts of tobacco smoke.

Seeding of parotid carcinoma along Vim-Silverman needle tract

A case report of seeding of parotid carcinoma along a core biopsy needle tract is presented. Excision of the needle biopsy site at the time of definitive surgery is recommended. Aspiration needle biopsy with a fine needle is reliable, with tumor seeding less likely.

Laboratory investigations on neuroparalytic accidents associated with suckling mouse brain rabies vaccine. III. -- Preservation of vaccine potency after elimination of murine brain myelin by centrifugation

Myelin, which has been found in nine day-old mouse brain, was eliminated from weanling mouse brain suspensions by centrifugation at 17,000 g for 10 min, as demonstrated by electron microscopy and guinea-pig inoculation tests for encephalitogenic activity. This centrifugation procedure did not affect the potency of seven batches of suckling mouse brain vaccine, when centrifuged and non-centrifuged samples of the same batches were compared by a modified NIH potency test (t = 0.17). The present results with weanling mouse brain preparations suggest that centrifugation at 17,000 g be used in the preparation of rabies suckling mouse brain vaccine instead of the 1,900 g currently employed, which does not eliminate myelin. This new procedure would be expected to reduce the number of postvaccinal reactions which are attributable to the small amount of myelin which remains in vaccines prepared with new-born animal brains following the current procedure.

Adenocarcinoma of the glandular stomach following 3-methylcholanthrene, N-nitrosodiethylamine, or N-nitrosodimethylamine feeding in carcinogen-susceptible inbred Syrian

Invasive adenocarcinoma of the glandular stomach was induced in 3 BIO 87.20 inbred Syrian hamsters by the administration of 1 ppm N-nitrosodiethylamine or N-nitrosodimethylamine in the drinking water, and in 2 BIO 15.16 and 5 BIO 72.29 inbred Syrian hamsters by gavage of 3-methylcholanthrene. In contrast, many other similarly treated inbred Syrian hamster lines did not develop carcinoma of the glandular stomach. The glandular stomachs of rats and mice are resistant to polycyclic hydrocarcon carcinogenesis; however, the glandular stomachs of certain inbred Syrian hamsters develop adenocarcinoma after polycyclic hydrocarbon gavage. This work demonstrated the importance of genetic factors.

Report of five children with Hemophilus influenzae pneumonia. Resistance to ampicillin must always be looked for

Five cases of Hemophilus influenzae pneumonia were observed in a 13-month period at Fairfax Hospital, Fairfax, Va. More aggressive diagnostic procedures may be required in order to diagnose this disease with greater frequency. This has become especially important in view of the growing recovery of ampicillin-resistant H. influenzae strains.