Rapid recovery of nuclear estrogen receptor and oxytocin receptor in the ovine uterus following progesterone withdrawal.

We previously showed that progesterone rapidly down regulates nuclear estrogen receptor (Re) in the estrogen-primed rodent uterus. We have now extended these studies to test the response of the Re system in sheep uterus to progesterone withdrawal. Since the estrogen-Re complex is believed to regulate hormone-dependent gene expression, it was of interest to determine whether withdrawal of progesterone under constant estrogen stimulation would lead to the recovery of nuclear Re levels and estrogen action, i.

Infarction-nephrectomy for metastatic renal carcinoma. Southwest oncology group study.

Thirty patients with metastatic renal cell cancer were treated by renal infarction, followed by delayed nephrectomy. All cases were collected over an eighteen-month period, with a minimum follow-up of one year. There were no complete remissions and only one partial remission, which lasted twenty-one months before progression of disease.

Adjuvant intrahepatic chemotherapy with mitomycin and 5-FU combined with hepatic irradiation in high-risk patients with carcinoma of the colon: a Southwest Oncology Group phase II pilot study.

The Southwest Oncology Group conducted a pilot study in patients who had had total clinical resection of cancer of the colon and had a high risk of recurrence (Duke's C); the purpose of the study was to determine the toxic effects of intra-arterial chemotherapy combined with hepatic radiotherapy, in anticipation of their potential use in an adjuvant groupwide protocol. The treatment plan included intra-arterial chemotherapy with mitomycin (3 mg/m2) on Days 1, 4, 35, and 38 by slow intra-arterial push and 5-FU (1000 mg/m2) on Days 1-4 and 35-38 by continuous 96-hour infusion. Radiation therapy was begun on Day 8 of therapy and consisted of 1950 rads in 13 fractions over 2 1/2 weeks.

Phase II study of aziridinylbenzoquinone (AZQ) in patients with central nervous system malignancies: a Southwest Oncology Group Study.

AZQ, an alkylating agent with lipophilic characteristics allowing CNS penetration was studied in patients with primary CNS malignancies refractory to surgical and radiotherapeutic modalities. Responses were evaluated by three criteria: neurologic examination, performance status and CT scan of the brain. Improvement in all three parameters with stable or decreasing doses of decadron was required for a partial response.

A zonal pattern of cell proliferation and differentiation in the rhesus endometrium during the estrogen surge.

The cellular and tissue basis of endometrial renewal in the rhesus monkey is being investigated by radioautographic localization of proliferating cell populations. Here we report our findings on epithelial cell proliferation during the midcycle estrogen surge. Endometrial biopsies were obtained by hysterotomy at approximately 1 h after a single intravascular injection of [3H] thymidine ([3H]T).

Effects of pre-anaesthetic glycopyrrolate and cimetidine on gastric fluid acidity and volume in children.

The effects of pre-anaesthetic glycopyrrolate and cimetidine on gastric fluid pH and volume were studied in 96 paediatric patients from ages 6 months to 12 years undergoing elective surgery. They were randomly allocated into six groups with 16 patients in each group. Patients in group I received neither glycopyrrolate nor cimetidine and served as controls.

Effect of four primary prostaglandins and relaxin on blood flow in the ovine endometrium and myometrium.

The effect of the prostaglandins (PG) D2, E2, F2 alpha and I2 (infusions of 250 ng/min for 10 min into the uterine artery) and relaxin (1 microgram/min) on uterine contractions and on the myometrial and endometrial blood flow to the uterus of ovariectomized, estrogen-primed ewes was investigated. The 85Kr clearance method was used to measure blood flow. PGD2 and PGI2 increased both myometrial and endometrial capillary blood flow, whereas PGE2 and relaxin did not.

Effect of exogenous ovine placental lactogen on luteolysis induced by prostaglandin F-2 alpha in sheep.

The ability of ovine placental lactogen (oPL) to stimulate progesterone secretion by the ovary as well as its ability to protect the corpus luteum against the luteolytic action of PGF-2 alpha was investigated. When oPL was infused alone into the ovary for 2 h on Day 12 of an induced cycle at rates of 0.6, 6.

The structure of steroids and their diffusion through blood vessel walls in a counter-current system.

Several substances including prostaglandin F2 alpha, progesterone and 85-krypton have been shown to be transferred from the venous side to the arterial side of the circulation in the ovarian vascular pedicle. Experiments were therefore carried out to study the transfer of three pairs of steroids (progesterone and 20 alpha-dihydroprogesterone, C-21; androstenedione and testosterone, C-19; and estrone and estradiol-17 beta, C-18) in which each member of a pair differed by one hydroxyl group. Each pair of steroids, one labeled with 3H and the other with 14C, were infused in sequence for 30 minutes into a side branch of an ovarian vein near the hilus of the ovary with a rest period of 90 minutes between infusions.

Randomized trial of radiotherapy versus radiotherapy plus metronidazole for the treatment metastatic cancer to brain. A Southwest Oncology Group study.

One hundred sixteen eligible patients with metastatic cancer to the brain were randomized to receive either radiotherapy 3000 rad/10 fractions (treatment 1) or the same radiotherapy plus metronidazole 6 gm/m2 (treatment 2). One hundred eleven patients were either fully or partially evaluable. The response rates (CR + PR) and survival showed no significant differences between treatments.

Chlorozotocin: results in colorectal carcinoma treated with high and low doses. A Southwest Oncology Group study.

Clorozotocin was evaluated in patients with advanced colorectal cancer at 225 mg/m2 every six weeks in 14 patients with no prior treatment, at 200 mg/m2 in 43 patients with normal tolerance of prior chemotherapy, and at 100 mg/m2 in 38 patients with extensive or poorly tolerated prior therapy. Median survival for the respective groups was 192, 107 and 79 days; these differences are best explained as a function of performance status. Partial response was reported for one patient, 15 had disease stabilization and two had improvement short of partial remission.

Corpus luteum regression induced by ultra-low pulses of prostaglandin F2 alpha.

In view of the pulsatile nature of PGF2 alpha secretion from the ovine uterus at the time of luteolysis, experiments were designed to examine the effect of pulsed infusions of PGF2 alpha on luteal function and to re-examine the minimal effective levels of PGF2 alpha required to induce luteolysis. To mimic physiological conditions, hour-long infusions of PGF2 alpha in increasing concentrations were given either 4 times in 19 h or 5 times in 25 h into the arterial supply of the autotransplanted ovary in conscious sheep on day 12 of an induced cycle. Blood flow and progesterone secretion rate from the ovary were used to monitor directly the luteolytic effect of administered PGF2 alpha.

Antibody response to pneumococcal vaccine in patients with solid tumors and lymphomas.

Ninety patients with solid tumors or lymphomas were immunized with a polyvalent pneumococcal vaccine. Pre- and postimmunization antibody titers were determined by radioimmunoassay. Treated patients with lymphoma had poor antibody response whether on or off chemotherapy.

Phase II study of chlorozotocin in islet cell carcinoma. A southwest Oncology Group study.

Seventeen patients with islet cell carcinoma received chlorozotocin (CTZ). Nine received 200 mg/m2 IV every 6 weeks and 8 received 100 mg/m2. Responses were seen in eight (2 complete, 5 partial, 1 minor) of 13 patients who had received no prior chemotherapy, and in zero of four who had received prior chemotherapy.

The influence of radiation therapy quality control on survival, response and sites of relapse in oat cell carcinoma of the lung: preliminary report of a Southwest Oncology Group study.

Two hundred and ninety-eight patients with limited (confined to chest and supraclavicular area, encompassable by a single radiation portal) small cell carcinoma of the lung were entered on Southwest Oncology Group Protocol 7628. Patients were treated with multi-agent chemotherapy and radiation therapy with or without BCG. Radiation therapy quality control analysis, including dosimetric reconstruction and port film review was introduced after the protocol was activated and was retrospectively applied.