Bovine endozepine potentiates morphine analgesia in mice

This paper describes the influence of bovine endozepine (BEP) on the analgesic effect of morphine. The intraventricular administration of BEP between doses of 2-4 nmole in mice resulted in the potentiation of the morphine-analgesic effect. The basic pain threshold did not change when BEP was given alone, thus indicating that BEP is unable to elicit analgesic effect alone. Intravenous injection of BEP in the dose range of 5-7.5 mg/kg also potentiated the analgesic effect of morphine. These observations suggest that endozepine can act as a regulator of pain.

Phytochrome-mediated swelling of etiolated leaf protoplasts and its possible biological significance

Red light, mediated by the photoreceptor phytochrome, induces maize leaf unrolling as well as leaf expansion. Protoplasts prepared from maize leaves still in the rolled condition swell in a red-far red photoreversible manner indicating that phytochrome mediates this phenomenon. To determine if protoplast swelling is related to leaf unrolling, leaf expansion, or both, we compared red-light induced swelling of protoplasts from rolled maize leaves to protoplasts prepared from tissues that are known to grow in response to light but do not unroll. We also compared the swelling response of protoplasts from rolled vs. unrolled leaves. In all cases, we found that swelling correlated with the unrolling response and not leaf expansion.

[Anastomosis of peripheral nerves by fibrin glue. An experimental study]

This paper reports the results of experimental research of anastomosing peripheral nerves by fibrinogen glue. In research of 80 sciatic nerves of 40 rats, taking epineurial suture as a control, we welded the nerves by domestic glue or Tissu-col from abroad separately to make an evaluation and survey of nerve conduct speed and gastrocnemius weight and the histology and ultrastructure. It has demonstrated that this is a more practical method for nerve repair.

[Production and characterization of anti-human hepatocellular carcinoma monoclonal antibodies]

The hepatocellular carcinoma (HCC) cell line, QGY-7703, derived from a Chinese patient, was used to immunize the BALB/c mice. Fifteen hybridomas producing McAb that reacted with QGY-7703 cells were isolated from 858 hybridomas created in three cell fusions. In further studies two McAb, namely, AQGY1 and A-QGY2, were selected which specifically stained HCC cells grown in vitro. The reactivity of these McAb was not removed by the absorption by homogenates of the normal liver, but was by homogenates of HCC cells. A-QGY1 and A-QGY2 also reacted definitely with HCC cells in liver tissues of HCC patients, but neither with other cells in the tissues nor with nontransformed liver tissues of the same patients. Furthermore these two McAb stained the adult or fetal liver tissues, nor all of the other normal or tumor tissues that had been tested. Blocking and absorbing experiments revealed that A-QGY1 and AQGY2 antigens had no immunohomogenicity with antigens such as HBsAg, HBcAg, HBeAg, AFP and CEA. The specificity of these two McAb may be used potentially for the sero diagnosis, histologic identification, radioimmunoimaging and destruction of human hepatocellular carcinoma.

[Primary serologic investigation of HBV-like virus existence in domestic animals and fowls]

Using the reagent kits for detecting human HBV, primary serologic investigation was made in 6 kinds of domestic animals and fowls (total 673) by ELISA, spot hybridization and immuno-electronmicroscopy. The results showed that some sera samples of pigs, rabbits, chicken and geese were HBsAg, HBeAg positive and positive for spot hybridization by using 3(2)P-HBV-DNA probe, which suggested that HBV-like viruses might exist in those domestic animals and fowls. HBV-like virus particles were seen in one pig serum sample which was HBsAg positive. The particles could be divided into three forms in shape, large spherical particle (40-55nm), small spherical particle (20-30nm) and short filament particle. The further studies are needed.

[Treatment of orthostatic dysregulation by the principle of bu-shen yi-qi]

Sixty cases of orthostatic dysregulation was randomly divided into treatment group (TG) and control group (CG), both 30 cases. Traditional Chinese medical herbs were used for TG under the principle of Bu-Shen Yi-Qi, and routine treatments such as oryzanol, vitamin B1 and B6 were applied to CG. After a curable stage of one month, the results showed that 16 of TG and 4 of CG were cured; 8 of TG and 6 of CG improved. The cure rate and the effective rate were significantly better in TG than in CG (P less than 0.01). 43 cases (71.7%) clinically expressed mild anemia. Before and after the treatment, the values of RBC, SI, Hb, SIBC, MCH in 20 cases of TG turned significantly better (P less than 0.01), but 17 cases of CG remained unchanged under the principle. The authors purposefully selected herbs that contain rich trace elements. For example, iron is an important element of Hb and zinc is an element in proteotic nucleicacidase. The quantity of zinc in body is related to many enzyme activities. Since these herbs could increase chronotropic effect of blood vessels and cure anemia, they could be used to cure patients with orthostatic dysregulation.

[The effects of inherited susceptibility and life style on essential hypertension]

A case-control study of hypertension of 140 pairs indicated that inherited susceptibility and harmful life style were quite important risk factors in increasing the development of hypertension. The effects could be taken place by their interaction. Changing life style could be taken as one of the significant measures for preventing hypertension among population with inherited susceptibility.

The polymorphism of HLA antigens in the Chinese

Remarkable differences were observed in antigen frequencies (AF), gene frequencies (GF) and haplotype frequencies (HF) when 2441 healthy Chinese individuals representing nine different ethnic groups and living in 14 different geographic locations were examined for the genetic distribution of the various HLA Class I and II markers. A sizable number of individuals of each ethnic group within each of the three major categories of the Chinese population, namely, Hans, Mongols, and Southern minorities, have been studied here, providing useful population statistics for applications such as determination of probabilities of paternity, comparisons for HLA and disease associations, and anthropologic studies.

Triple-in double-out optical parallel logic processing system

A triple-in double-out optical logic operating system based on shadow-casting processing is described. All the 256 logic operations of three inputs can be performed, and the optical adder can be easily implemented. A real-time encoding method for the input patterns is also presented.