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- Nilsson, O, et al.
(author)
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Localization of estrogen receptors-alpha and -beta and androgen receptor in the human growth plate at different pubertal stages
- 2003
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In: The Journal of endocrinology. - : Bioscientifica. - 0022-0795 .- 1479-6805. ; 177:2, s. 319-326
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Journal article (peer-reviewed)abstract
- Sex steroids are required for a normal pubertal growth spurt and fusion of the human epiphyseal growth plate. However, the localization of sex steroid receptors in the human pubertal growth plate remains controversial. We have investigated the expression of estrogen receptor (ER) alpha, ERbeta and androgen receptor (AR) in biopsies of proximal tibial growth plates obtained during epiphyseal surgery in 16 boys and eight girls. All pubertal stages were represented (Tanner stages 1-5). ERalpha, ERbeta and AR were visualized with immunohistochemistry and the number of receptor-positive cells was counted using an image analysis system. Percent receptor-positive chondrocytes were assessed in the resting, proliferative and hypertrophic zones and evaluated for sex differences and pubertal trends. Both ERalpha- and ERbeta-positive cells were detected at a greater frequency in the resting and proliferative zones than in the hypertrophic zone (64+/-2%, 64+/-2% compared with 38+/-3% for ERalpha, and 63+/-3%, 66+/-3% compared with 53+/-3% for ERbeta), whereas AR was more abundant in the resting (65+/-3%) and hypertrophic zones (58+/-3%) than in the proliferative zone (41+/-3%). No sex difference in the patterns of expression was detected. For ERalpha and AR, the percentage of receptor-positive cells was similar at all Tanner pubertal stages, whereas ERbeta showed a slight decrease in the proliferative zone during pubertal development (P<0.05). In summary, our findings suggest that ERalpha, ERbeta and AR are expressed in the human growth plate throughout pubertal development, with no difference between the sexes.
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- Salonen, A, et al.
(author)
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Stable incidence of surgical treatment and hospitalisation for humeral shaft fractures among 0- to 16-year-old patients in Finland from 1987 to 2010
- 2014
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In: Journal of children's orthopaedics. - : SAGE Publications. - 1863-2521 .- 1863-2548. ; 8:2, s. 143-8
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Journal article (peer-reviewed)abstract
- Studies among children experiencing fractures report an increasing trend toward operative management. In the present study, we examined whether the same trend has occurred for humeral shaft fractures in accordance with increasing interest toward intramedullary nailing and other operative treatments. The number, incidence and treatment of all hospitalised 0- to 16-year-old patients with humeral shaft fractures in Finland was assessed over a recent 24-year period. Method The study included the entire adolescent (0–16 years) population in Finland during the 24-year period from January 1, 1987, to December 31, 2010. Data on hospitalised patients who sustained humeral shaft fractures were obtained from the nationwide National Hospital Discharge Register (NHDR) of Finland. Results During the study period, there were a total of 1,165 hospitalisations with a main or secondary diagnosis of humeral shaft fracture. The incidence of hospitalisation due to humeral shaft fractures was 4.8 per 100,000 person-years. The incidence increased only slightly among girls from 3.3 per 100,000 person-years in 1987 to 5.3 per 100,000 person-years in 2010. The incidence of reposition and casting was 1.1 per 100,000 person-years and the incidence of reposition with osteosynthesis, including intramedullary nailing, was 1.4 per 100,000 person-years. The specific incidence of intramedullary nailing remained low with no signs of increased incidence, and the incidence was 0.3 per 100,000 person-years. There were no significant changes in the incidence of surgical treatment during the 24-year study period. Conclusion Despite an overall increasing trend toward operative management of fractures in children, conservative management remains the treatment of choice for humeral shaft fractures based on the low and steady incidence of surgical treatment during the 24-year study period. In addition, the incidence of hospitalisation for fractures remained low without a significant increase during the study period.
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