The effect of gravity on the horizontal and vertical vestibulo-ocular reflex in the rat

Horizontal and vertical eye movements were recorded in alert pigmented rats using chronically implanted scleral search coils or temporary glue-on coils to test the dependence of the vestibulo-ocular reflex (VOR) upon rotation axis and body orientation. The contributions of semicircular-canal versus otolith-organ signals to the VOR were investigated by providing canal-only (vertical axis) and canal plus otolith (horizontal axis) stimulation conditions. Rotations that stimulated canals only (upright yaw and nose-up roll) produced an accurate VOR during middle- and high-frequency rotations (0.2-2 Hz). However, at frequencies below 0.2 Hz, the canal-only rotations elicited a phase-advanced VOR. The addition of a changing gravity stimulus, and thus dynamic otolith stimulation, to the canal signal (nose-up yaw, on-side yaw, and upright roll) produced a VOR response with accurate phase down to the lowest frequency tested (0.02 Hz). In order to further test the dependence of the VOR on gravitational signals, we tested vertical VOR with the head in an inverted posture (inverted roll). The VOR in this condition was advanced in phase across all frequencies tested. At low frequencies, the VOR during inverted roll was anticompensatory, characterized by slow-phase eye movement in the same direction as head movement. The substantial differences between canalonly VOR and canal plus otolith VOR suggest an important role of otolith organs in rat VOR. Anticompensatory VOR during inverted roll suggests that part of the otolith contribution arises from static tilt signals that are inverted when the head is inverted.     

Artificial Liver: Present and Future

Early in 1956, the first model of a biological artificial liver, using a live dog's liver incorporated in a cross-hemodialyzer, was placed in an experimental animal with portocaval encephalopathy. This "biological artificial liver," a hybrid artificial liver in the present terminology, was the first in the world. In October 1958, the first human patient, a young male patient in hepatic coma due to liver cirrhosis, was placed on the laboratory-made biological artificial liver composed of four parabiotic cross-hemodialyzers connected with four live dogs' livers to which the "hepatic reactors" for ammonium adsorption and acid-base balance were additionally equipped. This first case was very successful, resulting in the patient's recovery from coma. This article introduces the past history of the artificial liver, research of which has mainly been conducted in Japan since the early 1950s by the author, M. Mito, and Y. Nosé. Until recently, little progress has been made in this field through the application of blood purification principles such as hemoadsorption, plasmapheresis, and other modifications and combinations. Accumulation of clinical experiences with such conventional methods has stimulated the third generation of the artificial liver to a return to a hybrid organ applying modern science and technology. A concept of hybrid organs in comparison with organ transplants is introduced. The Japanese national project of developing a new artificial liver system, as conducted by the author as the chairman and his associates, is introduced.     

调畅五脏、调和营卫治疗自汗临证体会

通过分析汗与五脏、营卫的关系,探讨自汗证的病因病机,概括为五脏皆有汗,汗之本为心,汗之化为肾,汗之出为肺,汗之源为脾胃,汗之调为肝。又必以营卫调和为要,汗出方能有节。五脏功能失调、营卫失和均可致自汗。故提出“调畅五脏、调和营卫”的自汗证治则及处方用药,通过典型临床病案,进一步阐释诊疗思路及用药规律。     

HX-Ⅰ液作为腹部内多器官灌注液可行性研究

采用大鼠肝脏非循环离体灌注模型,观察HX-Ⅰ液对大鼠肝组织含水量、肝窦内皮细胞死亡率,Krebs－Henseleit液天门冬氨酸转移酶活性、分泌胆汁的肝脏数量;观察HX-Ⅰ液对糖尿病大鼠胰腺移植术后血糖（Pod＋2,7,14）、糖耐量、胰岛素变化;观察HX-Ⅰ液对狗肾移植术后血肌酐、存活率及肝、胰、肾脏的形态学。结果表明,HX-Ⅰ液保存大鼠肝脏达24h,胰腺48h,狗肾脏达72h。说明HX-Ⅰ液作为腹部内多器官灌注液是可行的。     

A preliminary study of microcapsule suspension for hemolysis evaluation of artificial organs

A microcapsule suspension, a substitute for animal blood in hemolysis tests, has been developed for evaluation of the absolute hemolytic properties of circulatory artificial organs. The microcapsule suspension was made by dispersing microcapsule slurry into an ethylene glycol sodium chloride solution. The microcapsule slurry was composed of a leuco dye solution and polyurethane membrane made by the reaction between aliphatic poly-isocyanate and polyamine by interfacial polycondensation. The microcapsule was a small particle containing dye inside. The microcapsule suspension was white; the diameter of the microcapsules was from 5 to 100 microns. The specific gravity of the suspension was 1.024, and the membrane was elastic. The fluid showed Newtonian characteristics, different from animal blood, and its viscosity was approximately 5.8 mPa.s. After the microcapsules were destroyed, the leuco dye was extracted with n-hexane from the suspension and was measured by spectroscopy after being colored with acid ethanol. Hemolysis can be regarded as a fatigue fracture of cell membranes rather than a static fracture. The destruction of microcapsules by a Potter type tissue grinder was observed at a low stroke number region and was compared to rat blood. Moreover, hemolysis tests of a commercially available centrifugal blood pump and the prototype of our centrifugal pump for mechanism checks were carried out with bovine blood. The hemolysis level of the prototype pump increased with time while the hemolysis level of the commercial blood pump did not change as much as that of the control when both pumps were tested with the microcapsule suspension. These results are similar to tests utilizing bovine blood. Therefore, hemolysis tests of circulatory artificial organs completed with microcapsule suspension are expected to provide results similar to tests with animal blood.     

The feasibility of demonstration of GM- and InV-systems in decaying organs

Summary -globulin factors (Gm and InV-systems) were determined in 12 cadavers in blood and various organ exprimates (kidney, liver, spleen and muscle). Also checked was the time interval up to which these factors could still be demonstrated in decaying organs.For this purpose blood and portions of the organs were left to decay in plastic containers at an average temperature of 19.1°C. Examinations were done with the agglutination-inhibition-test. The exprimates were employed in dilutions 1:10 and 1:20. The serum factors Gm (1), (2), (4), (10) and InV (1) could be demonstrated for varying periods of time.In organs they could be demonstrated for between one and eight weeks. Only factors Gm(1) and Gm(2) could be demonstrated beyond this time. As a rule these serum factors were demonstrable in blood for a longer period of time than in organs. Factor Gm(4) proved to be the most stable one, as it could be demonstrated up to 11 weeks in decaying serum.In 2200 individual tests with a dilution 1:20 no false positive results were obtained, with the dilution 1:10, however, 5 false positive tests were found. No explanation can be given for the different periods of time for which these factors can be demonstrated under conditions of decay.

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Zusammenfassung Bei zwölf Leichen wurden im Blut und in verschiedenen Organpreßsäften (Niere, Leber, Milz und Muskel) die -Globulineigenschaften (Gm- und InV-Systeme) bestimmt und ihre Nachweiszeit bei Fäulnis überprüft. Blut und Organteile wurden hierbei in verschließbaren Plastikgefäßen bei einer mittleren Temperatur von 19,1°C faulen gelassen. Die Untersuchungen erfolgten mit dem Agglutinationshemmtest.Die Preß- bzw. Fäulnissäfte wurden in 1:10 und 1:20 Verdünnungen verwendet. Die Serumfaktoren Gm(1), (2), (4), (10) und Inv(1) konnten über unterschiedlich lange Zeiträume nachgewiesen werden.In den Organen betrug die Nachweiszeit zwischen einer und acht Wochen, wobei nur die Faktoren Gm(1) und Gm(2) über diese Wochen nachweisbar blieben. Die Serumeigenschaften waren im Blut allgemein länger nachweisbar als in den Organen. Am stabilsten erwies sich der Faktor Gm(4), der bis zu elf Wochen im faulenden Serum festgestellt werden konnte.Bei 2200 Einzelbestimmungen wurden mit der 1:20 Verdünnung in keinem Fall falsch positive Ergebnisse erzielt, mit der 1:10 Verdünnung hingegen fünf falsch positive Ergebnisse.Eine Erklärung für die unterschiedlich langen Nachweiszeiten unter Fäulnisbedingungen kann nicht gegeben werden.

     

Effect of active immunization to luteinizing-hormone-releasing hormone on the fertility and histoarchitecture of the reproductive organs of male rat

Summary The feasibility of using a vaccine against luteinizing-hormone-releasing factor for supression of pituitary and gonadal functions has been indicated for some time. Antibody production against this low-molecular-weight, naturally occurring decapeptide, however, requires to be coupled to a carrier protein to enhance its immunogenicity. LHRH was coupled to diphtheria toxoid (DT). Adult male Sprague-Dawley rats with a mean basal body weight of 200g were immunized with anti-LHRH-DT (20 g/injection/rat) at four-week intervals. An equal number of unexposed animals served as controls. Six animals were killed every two weeks up the end of the week 43. The vaccination schedule did not have any effect on the gain in body weight, nor was any adverse effect of vaccination observed in the course of the investigations. The pituitary, prostate, epididymis, testes, seminal vesicles, adrenal and thyroid were excised for determination of organ weight and histological examination. The adrenal, pituitary and thyroid showed no remarkable weight changes during the observation period, whereas the weights of the reproductive organs demonstrated significant reductions compared to those of the control group. The histopathology revealed marked to significant changes in the gonads and the accessory sex organs including the prostate. A progressive phase of regeneration of spermatogenesis was evident 98 days after vaccination. Total recovery of spermatogenesis was observed 300 days after vaccination. The mating studies showed the return of fertility 300 days after vaccination. The litters borne were normal. Prostate showed recovery after 154 days of vaccination. Our observations lend strong support to the hypothesis that anti-LHRH vaccine can be effectively used on the management of prostate carcinoma. If the vaccination is given together with a suitable dose of long-acting androgen, contained in an adequate delivery system, the regimen may be used for the regulation of male fertility.     

Evaluation of various doses of testosterone on accessory reproductive organs and plasma testosterone in intact and gonadectomized rhesus monkeys (Macaca mulatta).

The effect of 10 days i.m. treatment of testosterone propionate (TP) on plasma testosterone and accessory reproductive organs were studied in adult (6 to 6 1/2 kg) male rhesus monkeys, housed under natural light conditions using six different dose levels. The study was scheduled in the month of September and October. To maintain the weight of accessory reproductive organs and testosterone levels in castrates, different dose levels of exogenous testosterone propionate were required: 3.2 mg/d for seminal vesicles, 4.8 mg/d for ventral prostate and 3.2 mg/d for plasma testosterone titer. The levels of so-called "physiological" doses of exogenous testosterone varied for various target organs under consideration. TP at a dose of 0.4 mg/d had a depressing effect on plasma testosterone in intact monkeys. For higher doses, plasma testosterone increased roughly similarly in both intact and castrated monkeys. It suggests that with otherwise "physiological" doses of testosterone propionate, there is an almost complete blockage of endogenous testosterone secretion.     

关于中医学脏腑实质的思考

中西医研究的是同一个对象——人体及其脏腑组织器官 ,中医学的五脏六腑就是西医学的同名内脏器官 ,功能上有差异 ,只能说明认识主体认知能力的差异 ,认识接近真理程度的差异 ,而不能由此说明认识客体的差异。承认中医学的五脏六腑就是西医学的同名内脏器官 ,是中医发展的开始 ,是中医向自然科学开放的开始。     

二子阳宝的药理实验研究

二子阳宝能明显提高去势雄性小鼠副性器官和提肛肌指数；明显增加性交配功能；并能增强肾阳虚小鼠的耐缺氧，抗疲劳能力。