Plasma levels of protein C antigen during pregnancy and puerperium.
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Antigens↗
Biomedical subjects
K Kanamaru
Publications and source records attributed to K Kanamaru.
Congenital dermoid cyst of the anterior fontanel in a Japanese infant.
A congenital dermoid cyst located over the anterior fontanel is described in a Japanese infant. This is the sixth reported case of the lesion in Japanese patients. The literature is reviewed, and the concept that dermoid cysts of the anterior fontanel do not predominantly occur in blacks is supported.
Asian People↗
Intramural injection of ethanol under direct vision for the treatment of protuberant lesions of the stomach.
The experimental production of gastric ulcers in dogs by subnucosal injection of ulcerogeic agents is described. The most satisfactory agent tested was 95% ethanol, because it produced immediate changes in the mucosa which delineated the size of the ulcer. The depth of ulceration could be controlled and the ulcer healed readily. Using this technique of ulcer formation, treatment of protuberant gastric lesions was attempted. Eradication of the pedunculated and narrow-based polyps in stomach was almost totally successful by injection into the base. Wide-based lesions, including atypical hyperplasia and the elevated type of early gastric cancer, were also completely eradicated in 96% of the treated cases. There have been no complications. An initial assessment of the practicality of this method in poor risk patients is presented.
Acetates↗
Endothelium-dependent relaxation of canine basilar arteries. Part 1: Difference between acetylcholine- and A23187-induced relaxation and involvement of lipoxygenase metabolite(s).
Vascular responses to acetylcholine (ACh) and the calcium ionophore A23187 were studied in rings of canine basilar arteries. In preparations that were precontracted to a stable plateau by 3 X 10(-6) M prostaglandin F2 alpha (PGF2 alpha), 10(-9) to 10(-7) M A23187 elicited significant relaxation of the basilar arteries if the endothelium was intact. Judging from histologic findings, the ability of a ring to relax in this manner is due to the presence of the endothelium. The same concentration of A23187 did not relax vascular tissues in which the endothelium was purposely disrupted. Although 10(-7) to 10(-3) M ACh did not sufficiently produce endothelium-dependent relaxation of canine basilar artery rings, ACh in the same concentration did produce significant relaxation in canine femoral rings. Our results suggest that the sensitivity of the muscarinic receptor of cerebral arteries appears to be appreciably different from that of peripheral (femoral) arteries. Pretreatment with 1.5 X 10(-5) M indomethacin, a cyclooxygenase inhibitor, potentiated the contractile responses produced by PGF2 alpha in intact rings. Preincubation with the lipoxygenase inhibitors nordihydroguaiaretic acid at (NDGA) at 1.5 X 10(-5) M or AA861 at 10(-5) M prevented A23187-induced relaxation. The same concentration of NDGA and AA861 did not affect endothelium-independent relaxation induced by glyceryl trinitrate. We suggest that endothelium-dependent relaxation of the canine basilar artery by A23187 may be mediated by noncyclooxygenase metabolite(s).
Acetylcholine↗
Endothelium-dependent relaxation of canine basilar arteries. Part 2: Inhibition by hemoglobin and cerebrospinal fluid from patients with aneurysmal subarachnoid hemorrhage.
The effects of hemoglobin and cerebrospinal fluid from patients with subarachnoid hemorrhage (CSF-SAH) on endothelium-dependent relaxation were studied. At 10(-6) M, hemoglobin somewhat inhibited the endothelium-dependent relaxation induced by A23187 in rings of canine basilar artery. At 3 X 10(-6) M, it almost completely inhibited the same response. At 3 X 10(-6) M, hemoglobin did not significantly inhibit smooth muscle relaxation mechanisms as papaverine-induced relaxation was not inhibited by hemoglobin. It was also demonstrated that pretreatment of arterial rings with CSF-SAH resulted in a dose-dependent inhibition of relaxation induced by A23187. The inhibitory effect of CSF-SAH was prominent in the case in which a high oxyhemoglobin concentration was measured by spectrophotometry. Normal CSF from patients without SAH did not affect endothelium-dependent relaxation. These results suggest that hemoglobin released from lysed erythrocytes inhibits endothelium-dependent relaxation of canine basilar arteries and may also play an important role in the pathogenesis of cerebral vasospasm after aneurysmal subarachnoid hemorrhage.
Animals↗