No abstract available.
Heart* ; Thoracic Surgery*

No abstract available.
Lasers, Solid-State*

No abstract available.
Lasers, Solid-State*

No abstract available.
Thymoma*

No abstract available.
Pregnancy*

BACKGROUND: It is well known that excessive thyroid hormone in the body is associated with bone loss. However, the mechanism by which thyroid hormone affects bone cell metabolism remains unclear. It has been shown that thyroid hormones stimulate osteoclastic bone resorption indirectly via some unknown mediators secreted by osteoblasts, This study was undertaken to determine if interleukin-6 (IL-6) or interleukin-11 (IL-l1) could be the mediator (s) of thyroid hormone-induced bone loss. METHODS: We treated primary cultured human bone rnarrow stromal cells with 3,5,3-triiodo-thyronine (T) and measured basal and interleukin-l (IL-1)-stimulated IL-6/IL-ll production. We also investigated the possible modulating effect of 17B-estradiol (17B-E2.) on thyroid hormone action. RESULTS: T3 at 10 (-12) ~ 10 (-8) M concentration, significantly increased the basal IL-6 production in a dose-dependent manner, and also potentiated the stimulatory effect of IL-1 on IL-6 production. However, T failed to elicit a detectable effect on basal or IL-1-stimulated IL-11 production. Treat#ment with l7B-E2. inhibited IL-1-stimulated IL-6 production, but the effects of T3 on IL-6 production were not affected by 17/B-E. CONCLUSION: These results suggest that thyroid hormone may increase bone resorption by increasing basal IL-6 production and potentiating IL-1-induced IL-6 production from osteoblast-lineage cells, and these effects were independent of estrogen status.
Bone Marrow* ; Bone Resorption ; Estradiol ; Estrogens ; Humans* ; Interleukin-1 ; Interleukin-11* ; Interleukin-6* ; Mesenchymal Stromal Cells* ; Metabolism ; Osteoblasts ; Osteoclasts ; Osteoporosis ; Stromal Cells ; Thyroid Gland* ; Thyroid Hormones

Background: Inter1eukin-6(IL-6) is known to be produced by osteoblastic cells and to have impartant role in regulation of bone remodelling, Most previous studies indicated that IL-6 bas a major role in stimulating osteoclastic resorption by increasing recruitment and proliferation of preosteoclasts. But its autocrine effect on osteoblastic cells has not been well established yet. Therefore, we studied the effects of IL-6 on messenger RNA (mRNA) expression of proteins that are characteristic of osteoblastic cells in human bone marrow stromal (osteoprogenitor) cells (hRMSC). Methods: The expression of mRNAs for alkaline phosphatase, al(1)-collagen, osteopontin and decorin were studied by northern blot analysis after 3 7 days' treatrnent with IL-6 in the concenttation range of 101,000 U/ml. Results: The mRNA levels for any of the osteoblastic proteins studied did not change significantly by IL-6 treatment up to the concentration of 1,000 U/ml. Conclusion: These results suggest that IL-6 does not have a significant role in differentiatian or activities of human bone rnarrow stromal.
Alkaline Phosphatase ; Blotting, Northern ; Bone Marrow ; Decorin ; Humans ; Interleukin-6 ; Mesenchymal Stromal Cells ; Osteoblasts ; Osteoclasts ; Osteopontin ; RNA, Messenger

No abstract available.
Adenocarcinoma, Clear Cell* ; Vagina*

No abstract available.
Methylation*

Traumatic middle cerebral artery occlusion has rarely been discussed in the neurosurgical literature. Since Deveer and Browder reported the first case in 1942, only 24 cases of postraumatic middle cerebral artery occlusion has been reported until now. We experienced 2 cases of posttraumatic middle cerebral artery occlusion recently. One patient was 39 years old male who developed right hemiplegia, aphasia, and mental confusion after blunt head injury. Left carotid angiography was done and it revealed complete obstruction of the moddle cerebral artery in its initial portion. The other patient transfered to our Emergency Room under the semicomatous state with multiple facial laceration wounds. Simple skull X-ray revealed multiple linear skull fractures on the left frontal region. Left carotid angiogram showed complete obstruction of left middle cerebral artery in its proximal portion like as former case. During hospitalization, marked improvement was showed in both cases under the conservative treatment with steroid and low molecular weight dextran.
Adult ; Angiography ; Aphasia ; Cerebral Arteries ; Dextrans ; Emergency Service, Hospital ; Head Injuries, Closed ; Hemiplegia ; Hospitalization ; Humans ; Infarction, Middle Cerebral Artery* ; Lacerations ; Male ; Middle Cerebral Artery* ; Molecular Weight ; Skull ; Skull Fractures ; Wounds and Injuries