[Studies on brewer's yeast (II). Phlogistic action (author's transl)]

Yeast has a phlogistic effect, and the inflammatory action of 10 brewer's yeast samples fractionated by autolysis and/or destruction of the cell wall was studied in rat hind paw. The yeast samples produced a dose dependent edema when given subcutaneously into the paw. The samples obtained by dissolution or destruction of the cell wall produced the most prominent edema and the phlogistic effect was more potent than commerical yeast powder. Peak of the response was noted 1 hour after injection and thereafter the grade of edema rapidly decreased. The pattern of swelling resembled that by dextran. The edema was partially (less than 40%) inhibited by anti-inflammatory drugs such as aspirin, aminopyrine, phenylbutazone, and indomethacin. Mannan, a main constituent of the yeast cell wall, produced a swelling similar to that observed with yeast samples and this edema was almost completely inhibited by cyprohepatdine, an anti-serotonin drug, but was not inhibited by diphenhydramine, an anti-histamine drug. The results suggest that there is a release of serotonin when brewer's yeast is given subcutaneously, thus producing a phlogistic effect.

Modifications of primaquine as antimalarials. 1. 5-Phenoxy derivatives of primaquine

Various 5-phenoxy derivatives of primaquine have been prepared which are more active and less toxic than the parent compound in murine and monkey antimalarial screens. An improved method for the phthalimido alkylation of amines is described.

Osteochondromatosis of the finger joints

Two cases of osteochondromatosis of finger joints are reported.

Interactions of rodent malarial parasites with Friend erythroleukemia cells in vitro

The ability of Plasmodium chabaudi and P. yoelii to bind to Friend erythroleukemia cells in vitro was examined. Extensive binding of P. yoelii and weaker binding of P. chabaudi was observed. Binding to mouse fibroblasts was not seen, although there was some binding to cells of a mouse mastocytoma. The binding of P. yoelii to Friend cells was sensitive to specific antiserum. The development of P. berghei and P. yoelii in Friend cells was followed by microscopic examination and measurement of the infectivity of those cells in mice. Friend cells infected with both species appeared to develop morphologically normal intracellular forms of the parasites. P. yoelii-infected cells were infective in sensitive mice for 3 days after addition of the parasites, and this infectivity was not sensitive to treatment in vitro with mouse anti-P. yoelii serum.

Paracentric inversion of a human chromosome 7

In the course of chromosome studies of atomic bomb survivors in Hiroshima using the trypsin-G-banding and Q-banding methods, a 40-year-old male was found to have an abnormal banding pattern in the long arm of a chromosome 7, although no such abnormality was detected by ordinary staining method. Since all other chromosomes apparently had normal banding patterns, the abnormality was determined to be a paracentric inversion of a chromosome 7, which is described as 46, XY, inv (7) (q22q31). This is the first demonstration of a possible paracentric inversion in man.

Studies on the molecular species of DNA polymerase extracted from rat ascites hepatoma cells

DNA polymerase [EC 2.7.7.7] activities present in hypotonic extract from rat ascites hepatoma AH130 cells were eluted in three separable peaks on DEAE-cellulose column chromatography. Peak I activity had an alkaline pH optimum, and was relatively resistant to SH-blocking reagents and salt concentration. These properties of DEAE peak I are typical of low molecular weight DNA polymerase. DEAE peak II and peak III activities possessed properties corresponding to high molecular weight (6-8 S) polymerase; they showed maximal activity at neutral pH, and were sensitive to SH-blocking reagents and salt. No low molecular weight polymerase activity was released from DEAE peak II or peak III by salt treatment, though partial conversion from DEAE peak II to peak III was observed on the same treatment.

A new type of inversion of a human Y chromosome

Using chromosome banding techniques, a phenotypically normal male was found to have an abnormal banding pattern of the Y chromosome. By the constitutive heterochromatin staining method, a darkly stained band was located on the short arm and the proximal region of the long arm. The quinacrine staining method also showed a similar abnormal banding pattern: a brightly fluorescing band was seen on the short arm and the proximal region of the long arm. By the conventional Giemsa staining method, however, no specific morphological abnormality was detected in the aberrant Y. On detailed karyotype analyses no recognizable abnormality of banding patterns of any other chromosome was found aside from the abnormal Y. The abnormality was determined to be a complex inversion of the Y chromosome, which is described as 46,X,inv(Y)(pter leads to p11::q11 leads to q12::cen::q12 leads to qter).

Antimalarial phenanthrene amino alcohols. 3. Halogen-containing 9-phenanthrenemethanols

A series of new 9-phenanthrene amino alcohols has been prepared in which each compound bears from one to five halogen or halogen-containing moieties. A number of these compounds are extremely active against Plasmodium berghei in the mouse. Some structural requirements for optimal efficacy are considered.