Coat proteins of Rice tungro bacilliform virus and Mungbean yellow mosaic virus contain multiple nuclear-localization signals and interact with importin alpha.

Transport of the viral genome into the nucleus is an obligatory step in the replication cycle of plant pararetro- and geminiviruses. In both these virus types, the multifunctional coat protein (CP) is thought to be involved in this process. Here, a green fluorescent protein tagging approach was used to demonstrate nuclear import of the CPs of Rice tungro bacilliform virus (RTBV) and Mungbean yellow mosaic virus--Vigna (MYMV) in Nicotiana plumbaginifolia protoplasts. In both cases, at least two nuclear localization signals (NLSs) were identified and characterized. The NLSs of RTBV CP are located within both N- and C-terminal regions (residues 479KRPK/497KRK and 744KRK/758RRK), and those of MYMV CP within the N-terminal part (residues 3KR and 41KRRR). The MYMV and RTBV CP NLSs resemble classic mono- and bipartite NLSs, respectively. However, the N-terminal MYMV CP NLS and both RTBV CP NLSs show peculiarities in the number and position of basic residues. In vitro pull-down assays revealed interaction of RTBV and MYMV CPs with the nuclear import factor importin alpha, suggesting that both CPs are imported into the nucleus via an importin alpha-dependent pathway. The possibility that this pathway could serve for docking of virions to the nucleus is discussed.

Smoking as a risk factor in the health of women.

It is estimated that more than 200 million women smoke worldwide. It is also estimated that if current smoking rates among men and women persist worldwide, by 2025, 9% of the world's deaths and disabilities will be related to tobacco use. Smoking is associated with an increased risk of cardiovascular disease, cancer (lung, cervix, pancreas, kidney, bladder, esophagus, pharynx), pulmonary disorders, cerebrovascular disease, and many other health risks. Smoking also adversely affects fertility and reproductive outcomes. Although a greater percentage of women smoke in developed than in developing countries, women in developing countries appear to be initiating smoking habits in increasing numbers. If current trends persist, the adverse effects of smoking on women's health clearly will continue to escalate.

Cancer in women: prevention and early detection.

Cancer is the second leading cause of death for women in the United States. In 1998, there were approximately 600,000 new cases of cancer and 270,000 cancer deaths in U.S. women. Many of these cancer deaths are preventable. In 1987, lung cancer replaced breast cancer as the leading cause of cancer deaths in U.S. females. Cancer of the lung and bronchus was responsible for 25% of cancer deaths in U.S. women last year, killing approximately 67,000 women. It has been estimated that almost 90% of lung cancer deaths are associated with cigarette smoking and, therefore, are preventable. Some approaches to smoking cessation are reviewed. Breast cancer was responsible for 30% of cancers (178,700 women) and 16% of cancer deaths (43,500 women). Strategies for early detection and, possibly, for prevention are reviewed. The third most common cancer and the third most common cause of cancer deaths in U.S. women is colorectal cancer. Strategies for prevention and early detection are addressed. Cancer of the reproductive system affects approximately 80,000 U.S. women each year and results in approximately 27,000 deaths. Current screening capabilities, as well as some of the limitations of our current screening technologies, are addressed. The healthcare team, working in concert with our patients, government, and the health insurance industry, should be able to substantially reduce both the incidence of and mortality from cancer in women.

Smoking and women's health.

Each year more than 600000 women have deaths associated with cigarette smoking. In addition, cigarette smoking is associated with a wide array of morbidities (such as osteoporosis, cardiovascular disease, and adverse pregnancy outcomes). Two hundred million women smoke worldwide, and this number appears to be rising, particularly in developing countries. Obstetrician-gynecologists can play a role in reducing morbidity and mortality from cigarette smoking by educating women about the dangers, advising them not to smoke, and assisting those who do smoke to quit.

Changes and challenges for women in academic obstetrics and gynecology.

In obstetrics and gynecology, more than 60% of current residents and 36% of medical school faculty are women. However, fewer than 10% of professors and only a small number of department chairs and organizational leaders are women. This paper reviews the data on the growing number of women in obstetrics and gynecology, and in medicine in general, during the past 25 years. It reviews some of the challenges that women have faced and some strategies to enhance equitable opportunities.

Obstetrics and gynecology residencies: education in preventive and primary health care for women.

OBJECTIVE: To test the hypothesis that the Residency Review Committee program requirements for obstetrics and gynecology residencies, when properly followed, will result in residents being educated in preventive and primary ambulatory health care for women during their residency training program as specialists in obstetrics and gynecology. METHODS: The 60 requisite residency training competencies identified as essential to educate generalist physicians, and viewed by some educators as a benchmarking standard, each were evaluated to determine whether residents in obstetrics and gynecology are now being educated in each of these areas. The answer was considered affirmative if any of the following pertained: 1) the Residency Review Committee program requirements indicate that the competency "must" or "should" be taught, 2) the Residency Review Committee requests numerical verification related to the competency on the accreditation review application, or 3) by virtue of a specific rotation required by the Residency Review Committee it can be assumed that the resident will be educated in the competency. To make our assessment, we identified and listed the section of the Residency Review Committee for Obstetrics-Gynecology program requirements, which, when properly followed, would result in education in the particular competency. RESULTS: Fifty-seven of the 60 competencies were considered applicable to obstetrician-gynecologists (care of infants, care of children, and infant/child preventive care were not), and residents in obstetrics and gynecology were found to be educated in 54 (95%). CONCLUSION: During their residency training programs as specialists in obstetrics and gynecology, residents are being educated to be able to be providers of preventive and ambulatory primary health care for women.

Hormone production by the postmenopausal ovary in cases of benign ovarian neoplasia.

OBJECTIVE: The objective of this study was to determine whether hormone production by postmenopausal ovaries containing benign ovarian tumors differed from that of normal postmenopausal ovaries. STUDY DESIGN: The sera of 32 postmenopausal patients were assayed before and after bilateral oophorectomy for estrone, 17 beta-estradiol, androstenedione, testosterone, and dehydroepiandrosterone sulfate. The data from all patients as a group were analyzed, followed by analysis of the data from 15 patients with normal ovaries separately from the remaining 17 patients who had nonfunctioning, benign ovarian tumors. RESULTS: For patients with benign ovarian tumors there was a statistically significant drop in estrone (from a presurgical level of 55.8 +/- 46.3 pg/ml to a postoperative level of 29.9 +/- 10.2 pg/ml, p < 0.03) and 17 beta-estradiol (from 18.6 +/- 14.1 pg/ml preoperatively to 9.8 +/- 3.8 pg/ml postoperatively, p < 0.02). For postmenopausal woman with normal ovaries there was no significant drop in estrone or 17 beta-estradiol after bilateral oophorectomy. There was a statistically significant drop in testosterone and androstenedione after bilateral oophorectomy both for women with normal ovaries and for those with benign tumors. No significant differences in dehydroepiandrosterone sulfate were noted in either group. CONCLUSIONS: These data suggest that, although normal postmenopausal ovaries have not been demonstrated to secrete clinically significant amounts of estrogen, those that contain benign ovarian tumors do secrete small but significant amounts of estrone and 17 beta-estradiol. Both tumor-containing and normal ovaries secrete the androgens androstenedione and testosterone, this secretion not being significantly influenced by the presence of a tumor.

Excessive estradiol secretion in polycystic ovarian disease.

Polycystic ovarian disease is both a hyperestrogenic and a hyperandrogenic syndrome, and all studies have shown that hyperestrogenemia is the result of an elevation of estrone with plasma estradiol levels in the normal follicular range. Because a literature search failed to reveal any report of polycystic ovarian disease with significantly elevated estradiol levels, we report a case in which the plasma estradiol was so massively elevated as to mimic an estrogen-producing neoplasm. This case also suggests that although polycystic ovarian disease is a very rare cause of such excessive estradiol production, it should be included in the differential diagnosis of estrogen-producing neoplasms.

The use of large-loop excision of the transformation zone in an inner-city population.

OBJECTIVE: To determine whether large-loop excision of the transformation zone (LLETZ) can be used in our population to treat patients in a routine colposcopy clinic without diminishing the capability to see the large number of patients who require care, and to compare these results to our previous experience with laser surgery. METHODS: Patients found to have squamous intraepithelial lesions on colposcopically directed biopsies were offered treatment with LLETZ during counseling regarding their biopsy findings. Procedures included "ablation equivalents" and "cone biopsy equivalents" using local anesthesia. Follow-up examinations were used to determine cure and included cytology, colposcopy, and directed biopsies when indicated. The cure rate was compared to our previous experience with laser surgery. RESULTS: Two hundred thirty-six patients were treated in the colposcopy clinic without diminishing the capability to see all patients requiring care. Complications were few. The mean (+/- standard deviation) follow-up period was 50.7 +/- 25.3 weeks. The overall cure rate of 91.3% (95% confidence interval [CI] 87.1-95.5) was not influenced by the severity of the disease, but positive endocervical margins significantly lowered the cure rate to 69.2% compared with those who had negative margins. Before this series, only 73.1% of our patients scheduled for laser surgery returned for treatment. Assuming a 90% cure rate among those who returned, this means that the actual cure rate was only 65.8%. The likelihood of cure was 1.37 times greater (95% CI 1.27-1.52; P < .0001) using LLETZ in the clinic at the time the patient was counseled regarding her biopsy findings than using laser at a later date. In 33 patients, the LLETZ specimen showed no evidence of disease. The relative risk of negative histology was 3.31 (95% CI 1.78-6.13; P < .001) when LLETZ was done for a discrepancy between cytology and histology as opposed to any other indication. Cancer was found on the LLETZ specimen in four patients (two microinvasive, two frankly invasive), but was not suspected preoperatively in any of the patients. CONCLUSION: In our inner-city clinic, treatment with LLETZ at the time the patient was counseled regarding her biopsy findings improved the actual cure rate. The LLETZ procedure can be done safely in a clinic setting without diminishing the capability to care for a large number of patients.

The fourth-year medical school curriculum: recommendations of the Association of Professors of Gynecology and Obstetrics and the Council on Resident Education in Obstetrics and Gynecology.

OBJECTIVES: The Association of Professors of Gynecology and Obstetrics and the Council on Resident Education in Obstetrics and Gynecology have proposed a fourth-year medical school curriculum for a student interested in pursuing a residency in obstetrics and gynecology. STUDY DESIGN: Faculty members and residents in North Carolina, Illinois, and Michigan were surveyed as to the ideal curriculum that they would recommend for fourth-year students. The committee members representing the Council on Resident Education in Obstetrics and Gynecology and the Association of Professors of Gynecology and Obstetrics then reviewed these surveys and proposed a final curriculum. RESULTS: A core curriculum of general medicine as an acting internship, an intensive care unit rotation, neonatology, and emergency medicine was recommended. Additional courses strongly considered were ambulatory obstetrics-gynecology, acting internship in obstetrics-gynecology, endocrinology, and general surgery. CONCLUSION: The committee recommends a curriculum that is broad and balanced in general medical education.

Laparoscopic surgery for ovarian lesions: potential pitfalls.

Laparoscopic surgery for ovarian lesions has the potential for an enormous positive impact on the care that we are able to provide for our patients. Technologic advances and the proliferation of new equipment have occurred at a rapid rate. However, the criteria for the safe and appropriate use of endoscopic surgery have not been developed fully or followed by all surgeons, and there is some evidence that a lack of adherence to carefully considered protocols has the potential to have an adverse impact on women with ovarian lesions. McDonough made a thoughtful presentation on the need for technology assessment in the reproductive sciences, focusing on the fact that there has been a rapid diffusion of technology without prior broad-based critical peer review and stressing the need to have scientific technology assessment. Pitkin, in his editorial on operative laparoscopy, questioned whether we are evaluating therapeutic appropriateness properly as a separate and independent issue from technical feasibility. Obviously, it would be preferable to have had more controlled prospective data on the relative merits and risks of the use of the laparoscope for resection of ovarian cysts before the widespread use of this technology. However, there are several situations in which it currently appears to have important clinical utility for the patient. In addition, it already is being used widely, and it would be inappropriate to withhold this method from our patients. However, it should be urged that careful prospective evaluation be undertaken so that both the scientific community and the public are able to have an accurate understanding of the risks, benefits, indications, and contraindications of this technology. In addition, when a surgeon is considering pelviscopic surgery for an ovarian mass, it is essential that this be done with strict adherence to carefully constructed preoperative criteria and intraoperative protocols.

Is human papillomavirus-related disease an independent risk factor for human immunodeficiency virus infection?

We sought to determine the prevalence of human immunodeficiency virus (HIV) infection in a population of women with human papillomavirus (HPV)-related diseases attending a colposcopy clinic who had no other CDC-defined risk factors for HIV. Study patients included all new patients attending our colposcopy clinic who were found to have histologic evidence of condyloma or cervical intraepithelial neoplasia. Those patients not already known to be HIV-positive were offered testing for HIV. Demographic information was obtained on all patients. Results were compared to data from anonymous testing of our own obstetrical population. One hundred forty of 208 women (67.3%) were either previously known to be HIV-positive or agreed to be tested. Sixteen (11.4%) were HIV-positive. Eight of the HIV-positive women were not previously known to be HIV-positive and 6 of the 8 had no definable risk factors for HIV infection. This is 4.6% of the women not already known to have a CDC-defined risk factor for HIV. The rate of HIV infection in our obstetrical population is 1.6%. In women without other definable risks for HIV infection and who had HPV-related disease the relative risk of HIV infection in our population was 2.94 (95% confidence interval 1.21-6.94; P < 0.031). In areas where HIV is endemic there is a high prevalence of HIV infection in women with HPV-related disease. Even in women without another definable risk factor for HIV, HPV-related disease may serve as a marker for an increased risk of HIV infection in this population.

Resident attrition in obstetrics and gynecology.

OBJECTIVE: Our goal was to determine the rate of attrition from obstetrics and gynecology residency programs. STUDY DESIGN: The Council on Resident Education in Obstetrics and Gynecology sent questionnaires to all 295 obstetrics and gynecology residency program directors in the United States and Canada. These programs represent 4306 postgraduate-year 1 through 4 (or 5) resident positions each year. The program directors were asked the number of residents who left voluntarily or were dismissed in a 2-year period and the reasons they left. RESULTS: In a 2-year period 299 residents left or were dismissed (6.94% over 2 years, or 3.47% per year). Only 88 (1% per year) left specifically because they decided they preferred a different discipline. CONCLUSION: The rate of attrition from obstetrics and gynecology residency programs is not excessively high.

Comparison of the adrenocorticotropic hormone stimulation test in the follicular and luteal phases of the menstrual cycle.

A comparison was made of the ACTH stimulation test in the proliferative and luteal phases of the menstrual cycle in 13 subjects, each of whom served as her own control. The test yielded a 53.9% false-positive rate in the luteal phase. The study, therefore, clearly shows that from a practical, clinical point of view, the test is completely unreliable in the luteal phase, and is only valid when carried out in the follicular phase of the cycle.

Patient-controlled analgesia for cancer pain: a long-term study of inpatient and outpatient use.

The safety and efficacy of patient-controlled analgesia for the long-term control of cancer pain was tested prospectively. Respiratory rates, mental status, and pain relief were recorded at baseline and compared with those during the study period. Patients had a lower analgesic demand (i.e., self-administered less morphine during the nighttime); specifically, dosing declined 48% from the daytime level. Respiratory rates did not change appreciably during the study and no cases of significant respiratory depression were encountered. Patients self-administered sufficient morphine to produce adequate but not complete pain relief in almost all trials. Pain relief was safely achieved by both intravenous and subcutaneous routes of administration in both the inpatient and outpatient settings. Mean 24-h morphine use stayed relatively constant even for patients receiving more than 2 weeks of treatment. In conclusion, patient-controlled analgesia is effective and safe therapy for the long-term control of severe cancer pain.

Resident scheduling: night float programs.

Obstetrics and gynecology residency programs have traditionally involved long hours in the hospital. In recent years, in an attempt to determine whether work hours could be reduced while at least maintaining resident education and patient care, many program directors have instituted night float systems. In New York State, these systems must adhere to rigid hospital code requirements (limiting total hours worked and with specific mandates regarding time away from the hospital); in other areas, these requirements are not as limiting. At the request of the Council on Resident Education in Obstetrics and Gynecology, residency program directors and residents in the United States and Canada were sent a survey regarding whether they had a night float program, how it was structured, and what changes it was perceived to have caused. Responses were received from 193 program directors (65%) and 302 residents. Major differences were noted in the structure of the programs within New York state compared with those outside the state. In New York, 63% of the programs had residents in all 4 years participating in the night float; this was true for only 10% of the programs outside New York. In New York state, the programs were required to adhere to state hospital code requirements limiting hours on duty and mandating the specifics of time off, whereas the programs outside New York did not necessarily adhere to these restrictive requirements. Twelve characteristics were evaluated regarding changes that were perceived to have occurred as a result of the night float program.(ABSTRACT TRUNCATED AT 250 WORDS)

The long term benefits of a comprehensive teenage pregnancy program.

A comprehensive program was founded in 1982 to provide adolescents with prenatal and family planning care. The program's impact through its first five years of operation on medical aspects of pregnancy course and fetal outcome will be the subject of a separate report. This study examines subsequent maternal and infant health of the patients attending the program compared to a control group. Four hundred ninety-eight adolescents and their newborns attending the program's mother-baby family planning clinic from 1982 to 1989 (subject group) were compared to ninety-one adolescents and their newborns receiving postpartum family planning and pediatrics clinics from 1980 through 1989 (control group). Seventy-five percent of the subject group regularly attended mother-baby clinic, compared to 18% of the control group attending family planning and pediatric clinics (P less than or equal to .0001). The subject group experienced less maternal and infant morbidity, greater school attendance, graduation, employment, and contraceptive use than the control group (P less than or equal to .0001). Many parameters improved with each program year indicating continued wide acceptance of our program by area adolescents.