The association between hallux valgus and proximal joint alignment in young female dancers.

Very little is known about the relationship between proximal joint alignment and hallux valgus among young dancers. This study sought to determine the extent to which spinal and lower extremity alignments are involved in hallux valgus, and to identify predicting variables for its development in young dancers. A group of 1336 young female dancers aged 8-16 years, and 226 control participants of the same age cohort were screened for the presence of hallux valgus, body physique characteristics, joint range of motion, and anatomical anomalies. Hallux valgus was common in the 2 young female populations studied. Among the dancers, 40.0% had bilateral hallux valgus and 7.3% unilateral. Among the controls, 32.3% had bilateral and 1.8% unilateral hallux valgus (χ2=8.27, df=1, p=0.004). Following logistic regression analysis, age (OR=1.028, 95% CI=0.968-1.091), genu varum (OR=1.514; CI=1.139-2.013) and scoliosis (OR=2.089; CI=1.113-3.921) were found to be significant predicting factors for hallux valgus in the dancer group, whereas in the control group, the predicting factors were age (OR=0.911, 95% CI=0.801-1.036) and ankle plantar flexion range of motion (OR=0.972; CI=0.951-0.992). In conclusion, it was found that spinal deformity, lower extremity alignment, and joint range of motion are strongly related to hallux valgus.

Injuries among talented young dancers: findings from the U.K. Centres for Advanced Training.

The aim of the present study was to characterize the injuries of young dancers attending Centres for Advanced Training. 806 dancers, ages 10-18 years responded to surveys regarding their biological profile, dance experience and injury history, and were examined for their anthropometric profile. Of the 806 dancers, 347 reported an injury. Based on 4 age groups, the total hours of practice per week increased significantly with increasing age. Incidence of injuries per 1000 h of dance practice for dancers ages 11-12 were found to be significantly higher compared to the incidence for dancers ages 13-18 (p<0.05). Foot and ankle and other lower extremities were the most common injury location, and muscle injuries were the most common type of injury. Total months in CAT training (OR=1.044, 95% CI=1.014-1.075) and hours per week in creative style practice (OR=1.282, 95% CI=1.068-1.539) were found to be significantly associated with injuries. In conclusion, both young and mature dancers are exposed to extensive risk of injury. The intensity of training (such as number of months and number of hours of training per week) is important factor that should be taken into account in order to decrease future injuries among young dancers.

Adolescents' physical activity habits--results from a national health survey.

BACKGROUND: The MABAT Youth National Health and Nutrition Survey was conducted in Israel by the Ministry of Health and the Center for Disease Control. This article presents results of physical activity (PA) habits in Israel, in relation to recommendations by world health organizations. METHODS: Participants were 6274 adolescents, grades 7-12, enrolled in a cross-sectional, representative, school-based survey. Sufficient level of PA was defined as any moderate and vigorous level of PA that adds up daily to 60 min/day. Light PA was considered to be an insufficient level of PA. RESULTS: Only 10.5% of the participants reported performing sufficient PA. Large gender differences were found, with 17.7% of boys versus only 4.6% of girls meeting the guidelines. CONCLUSIONS: Results highlight the need to develop programmes for school children in Israel to promote PA. Such programmes have been initiated in many countries that have a large percentage of adolescents with a sedentary lifestyle.

Joint range of motion and patellofemoral pain in dancers.

The aim of the present study was to determine the association between joint range of motion (ROM) and patellofemoral pain syndrome (PFPS) in young female dancers. The study population included 1 359 female dancers, aged 8-20 years. All dancers were clinically examined for current PFPS, and their joint ROM was measured at the lumbar spine and the lower extremities. 321 of the 1 359 dancers (23.6%) experienced PFPS. Prevalence of the syndrome increased with the dancer's age (p<0.001). Dancers with hypo ROM in hip external rotation, ankle plantar-flexion, ankle/foot pointe, hip abduction, hip extension, and limited hamstrings and lumbar spine were significantly less prone to developing PFPS compared to dancers with average ROM: 19.2% vs. 26.2% (p=0.014); 13.7% vs. 26.1% (p<0.001); 12.2% vs. 26.2% (p<0.001); 10.0% vs. 25.3% (p<0.001); 12.6% vs. 24.2% (p<0.001); and 9.3% vs. 28.2% (p<0.001), respectively. The group with the smallest prevalence of PFPS (10.2%) manifested restricted ROM at both the hip and ankle/foot joints. Dancers with decreased hip and ankle/foot joints ROM are less prone to develop PFPS. When making an association between joint ROM and injuries, not only the ROM at the targeted joint should be considered, but also the ROM at neighboring joints.

Low back pain--a community-based study of care-seeking and therapeutic effectiveness.

PURPOSE: To describe care seeking characteristics among low back pain subjects (LBP); to describe the perceived effectiveness of interventions by recipients of care for LBP; and, to discuss the gap between LBP management guidelines and actual practice in primary care. METHODS: The population consisted of 555 subjects who were recruited from a cross sectional survey of all inhabitants of a small town in Israel. They reported 1 month LBP and were further probed regarding the characteristics of their pain and pattern of care. Data collection was performed by a self-administered questionnaire. RESULTS: Some form of care was sought by 78.7% of the participants. More than half (58%) visited a physician, 34.4% were prescribed drug therapy, 37.1% attended physical therapy and 28.6% turned to alternative medicine. Participants with severe pain were more likely to seek care. That was demonstrated by all pain measures (e.g. high Roland and Morris disability scores (8.2+/-5.6 vs 4.4+/-4.1), high symptoms frequency (8.9+/-4.1 vs 7.5+/-3.6) and high pain severity scores (5.6+/-2.2 vs 4.5+/-1.7)). The intervention perceived to be most effective was alternative medicine (graded as 'effective' or 'very effective' by 62.8%), followed by therapeutic exercise programmes (56.9%), bed rest (51.9%) and physical therapy (46.8%). CONCLUSIONS: Individuals reporting severe LBP were more likely to seek care. The treatment utilities perceived to be most effective were alternative medicine and therapeutic exercises, whereas the least effective were physicians' office visits. A gap was found between clinical guidelines and physicians referrals for other therapeutic interventions.

Low back pain: reliability of a set of pain measurement tools.

OBJECTIVES: To determine the reliability and internal consistency of a set of low back pain (LBP)-related measurement tools and to determine whether they are appropriate for use in a large-scale, community-based sample in Israel. DESIGN: Test-retest reliability study, with an interval of 2 to 14 days between test and retest. SETTING: Physiotherapy clinics. PARTICIPANTS: One hundred fifty-one patients with LBP. MAIN OUTCOME MEASURES: The Modified Roland-Morris Disability Questionnaire (MRMQ); a simple verbal pain severity scale; and modified pain symptoms frequency and bothersomeness indices. Three measures of variables with potential association with LBP were also used: a Fear-Avoidance Beliefs Questionnaire (FABQ), work satisfaction scale, and the Baecke Physical Activity Questionnaire (BPAQ). RESULTS: Test-retest reliability was high for the MRMQ, pain symptom indices, work index of the FABQ, and occupational activity index of the BPAQ; the internal consistency of the MRMQ and FABQ work index were also high (intraclass correlation coefficient >or= .89; alpha = .89). CONCLUSIONS: Most measurement tools are reliable and suitable for community LBP studies in Israel.

Helicobacter pylori infection in rural settlements (Kibbutzim) in Israel.

BACKGROUND: Helicobacter pylori (HP) is accepted as a major cause of type B gastritis, which is strongly associated with peptic ulcer disease. Epidemiological studies have indicated a correlation of HP infection and socioeconomic class. METHODS: To determine the prevalence of HP infection and to evaluate symptoms and risk factors associated with HP infection in a rural population, 377 asymptomatic individuals were studied out of a random sample of 453 people. Subjects were randomly chosen in a ratio of 1:4 of all the adults over 30 years, living in eight communal settlements in Israel. Blood samples were taken and subjects answered a questionnaire in which sociodemographic information, clinical gastrointestinal background and the use of medication were included. A sensitive enzyme-linked immunoassay was used to determine antibodies to HP in serum. RESULTS: The overall prevalence of HP infection was 72%. In a multivariant discriminant analysis: age, country of origin and ethnic group were found to be the most closely associated variables for HP infection and the discriminant analysis succeeded in predicting correctly, in 62% of the population, whether they had or did not have HP infection. There was no significant difference with gender, occupation, educational level, blood group, smoking, gastrointestinal symptoms and use of medication. CONCLUSIONS: The prevalence of HP infection was higher than that in industrialized countries, but lower than in developing countries. The prevalence in a rural population was slightly higher than that of an urban population in Israel (65%). The country of origin and ethnic group influenced the prevalence of HP infection and not birth and growing up on the Kibbutz.

Chloroamphetamine did not prevent the effects of chronic antidepressants on 5-hydroxytryptamine inhibition of forskolin-stimulated adenylate cyclase in rat hippocampus.

Administration of p-chloroamphetamine (PCA, 10 mg/kg i.p. on two occasions) to rats resulted in a severe depletion of [3H]paroxetine binding sites, a measure of presynaptic serotonergic terminals, in both cortex and hippocampus, but did not affect [3H]8-hydroxy-2-(di-n-propylamino)tetralin [( 3H]8-OH-DPAT) binding or 5-hydroxytryptamine (5-HT)-induced inhibition of forskolin-stimulated adenylate cyclase in hippocampal membranes. Administration of either imipramine (15 mg/kg i.p. for 2 weeks) or lithium (0.2% for 2 weeks) to PCA-treated rats did not affect [3H]8-OH-DPAT binding but reduced the degree of inhibition of forskolin-stimulated adenylate cyclase by 5-HT in hippocampal membranes. It is concluded that the effects of imipramine and Li+ on 5-HT1A receptor-mediated responses in the hippocampus are exerted postsynaptically, possibly at a level distal to the receptor.

Specific interaction between the p53 cellular tumour antigen and major heat shock proteins.

The protein p53 is capable of participating in neoplastic transformation and can form specific complexes with the large-T antigen of simian virus 40 (SV40). This interaction probably results in the stabilization of p53 (refs 7,8) and may contribute to SV40-mediated transformation. Several non-SV40-transformed cells also exhibit a stabilized p53 which is present in elevated levels. Recently, this stabilization was shown to coincide with the ability to precipitate a polypeptide (p68) of relative molecular mass (Mr) 68,000-70,000 by anti-p53 monoclonal antibodies. We now report that this co-precipitation indeed represents a specific complex between the two proteins; the complex sediments on a sucrose gradient as a relatively broad peak of 10-14S and can be dissociated in vitro. Furthermore, p68 is the HSP70 heat shock protein cognate, found in elevated levels in a p53-overproducing cell line. On heat-shock treatment of such overproducers, p53 also forms a complex with the related highly inducible HSP68.

In vitro RNA synthesis in nuclei from herpes simplex virus infected cells: effects of ultraviolet-irradiated, defective and bromodeoxyuridine-resistant virus preparations.

Transcription of virus DNA was detectable in vitro in nuclei isolated from cells infected with wild type and bromodeoxyuridine (BUdR)-resistant herpes simplex virus type 1 but was suppressed in nuclei of cells infected with ultraviolet irradiated or defective virus or cells treated with BUdR during infection.

Isolation of Marek's disease virus DNA from infected cells by electrophoresis on polyacrylamide gels.

Marek's disease virus DNA isolated from the nuclear fraction of infected chicken embryo fibroblasts and sucrose-purified particles was electrophoresed on 3 per cent polyacrylamide gels and was compared in its electrophoretical behaviour with isolated pseudorabies and herpes simplex DNA, strain HF. The DNA molecules eluted from the gel were identified by their sedimentation coefficient (53--55S) and buoyant density (1.707 g/ml) to be of viral origin. MDV DNA molecules were electrophoretically also detected and identified in DNA preparations of the lymphoblastoid Marek's disease tumour cell line MSB-1 which therefore has to be considered as a producer line. The electrophoresis of DNA preparations from Marek's disease virus-infected cells on polyacrylamide gels provides a semipreparative method for the isolation of MDV DNA.

Nucleic acid biosynthesis in nuclei of cell infected with herpesviruses (HSV and EBV).

Analysis of nuclei isolated from herpes simplex virus (HSV)-infected cells by electrophoresis in polyacrylamide gels showed that only virion-associated DNA molecules migrated into the gels. The viral DNA molecules, which do not migrate in the gels, are the precursors for the mature viral DNA. Centrifugation of deoxycholate-treated infected nuclei in sucrose gradients revealed that most of the viral DNA co-sedimented with the cellular DNA. The DNA-dependent RNA polymerase activity also co-sedimented with the viral and cellular DNA. Incubation of nuclei isolated from HSV-infected cells, under in vitro conditions that support DNA synthesis, resulted in the synthesis of viral molecules of low molecular weight. Under the same conditions, nuclei from Burkitt lymphoblasts did not synthesize DNA. The nature of the association between cellular DNA and EBV DNA was studied by hybridization with EBV cRNA. EBV-specific sequences were found in the lymphoblast DNA; they banded at a density of 1.707 g/cm3. Some of the viral mRNA transcribed in HSV-infected nuclei is symmetrically transcribed from HSV DNA. The symmetrical portions of the RNA are removed, since poly (A)-containing mRNA molecules lack homologous sequences. Most of the RNA synthesized in HSV-infected nuclei can be released after incubation of the nuclei in vitro in the presence of ATP. The released RNA consists of poly(A)plus and poly (A)-minus molecules. The mechanism of RNA transport from the nuclei still remains to be studied.