BACKGROUND:During degeneration of cervical spine, biochemical changes appeared in intervertebral disc cel s. During this process, a variety of inflammatory cytokines may lead to disc herniation, which stimulates the production of a variety of inflammatory factors from surrounding adjacent tissue.
OBJECTIVE:To explore the expression and significance of interleukin-1β, interleukin-6 and cyclooxygenase 2 in patients with different clinical symptoms of cervical spinal cord oppression.
METHODS:Protrusion of the intervertebral disc or disc of responsibility among patients with anterior disc resection and internal fixation were divided into three groups according to clinical symptoms:myelopathic symptom group, nerve root symptom group and cervical spine trauma group. Intervertebral disc received hematoxylin-eosin staining and immunohistochemical staining for morphological observation. Positive cel s were counted according to the result of immunohistochemical staining.
RESULTS AND CONCLUSION:(1) Hematoxylin-eosin staining results showed visible inflammatory cel infiltration and new blood vessel formation in the myelopathic symptom group and nerve root symptom group. No remarkable inflammatory cel infiltration or new blood vessel formation was seen in cervical spine trauma group. (2) Immunohistochemical staining interleukin-1β-, interleukin-6-positive cel s were seen in the myelopathic symptom group. Cytoplasm was stained tan. Cyclooxygenase 2-positive cel s showed a low number. The numbers of interleukin-1β-, interleukin-6-and cyclooxygenase 2-positive cel s were significantly more in the nerve root symptom group than in the myelopathic symptom group. The numbers of interleukin-1β-, interleukin-6-and cyclooxygenase 2-positive cel s were smal in the cervical spine trauma group. (3) Expression rate and IA value of interleukin-1β, expression rate and IA value of interleukin-6 were significantly higher in the myelopathic symptom group and nerve root symptom group than in the cervical spine trauma group (P<0.05). Expression rate and IA value of cyclooxygenase 2 were significantly higher in the nerve root symptom group than in the cervical spine trauma group. (4) These results suggested that interleukin-1β, interleukin-6 and cyclooxygenase 2 expression could be found in the cervical intervertebral disc after protrusion, and played a role in early degeneration of cervical intervertebral disc. The expressions of these inflammatory factors were significantly different in patients with different clinical symptoms of cervical spinal cord compression.

BACKGROUND:The greatest risk of osteoporosis in total knee arthroplastyisperioperative and long-term periprosthetic fractures. However, limited by the traditional concept of osteoarthritis patientswhousualy not associated with osteoporosis, domestic clinical trials have not given enough attention to the osteoporosis before total knee arthroplasty.
OBJECTIVE:To analyze the osteoporosis and its relative factors in osteoarthritis patients before total knee arthroplasty.
METHODS:Data of 81 cases (81 knees) of knee osteoarthritiswhounderwenttotal knee arthroplasty in the Department of Joint Surgery of Tianjin People’s Hospital from January 2012 to November 2014 were retrospectively analyzed. They received lumbar spine and hip bone mineral density examination before surgery. The correlation of bone mineral density with age, body mass index, knee motion range,and knee deformity was analyzed before surgery. The independent risk factors for osteoporosis before replacement were analyzed.
RESULTS AND CONCLUSION:(1) Of 81 patients, there were normal bone mineral density in 25 cases (31%), osteopenia in 35 cases (43%),andosteoporosis in 21 cases (26%). Al 10 males had no osteoporosis and 21 in 71 female cases suffered osteoporosis (30%). Theincidence of osteoporosis in females was significantly higher than in male patients (P=0.046). (2) There was a linear correlation of bone mineral density with age and body mass index (correlation coefficientr=-0.230, 0.225). (3) The age of≥65 years and body mass index≥25 kg/m2were independent risk factors of osteoporosis before replacement (P< 0.05). (4) Patients with knee osteoarthritis had higher incidence of osteopenia and osteoporosis before total knee arthroplasty. The degree of osteoporosis was negatively correlated with age, but positively correlated with body mass index. The age of≥65 years and body mass index < 25 kg/m2were independent risk factors for preoperative osteoporosis. Thus, bone mineral density examination is essential for those patients before total knee arthroplasty.