34). Clayson (8) has pointed out that “. . . promoting agents must act by bringing about an increase in the number of precancerous or cancerous cells compared with the number of normal cells. . . .“While this selection for initiated cells may be accomplished in several different ways, a molecular basis for the selection is suggested based on the experiments described here. The process of pr...

 To determine the neuropharmacological activity of the leaf extract of Croton zambesicus in mice and chicks. The effect of aqueous leaf extract of Croton zambesicus on thiopental sodium – induced sleeping time in mice, on gross locomotor activity (GLA) in 2-day old chicks and effect of extract on apomorphine - induced stereotyped behavior in chicks were evaluated. The a...

The lower eyelid skin will retain its pigmentation and wrinkles after a routine lower blepharoplasty. Phenol peeling with croton oil combinations produces a complementary lightening of the skin and an improvement of the wrinkling. Deep peeling with phenol and croton oil has been controversial because of the hypo-pigmentation that generally results. This report explains the technique used by the...

The terpenes, sterols, alkaloid (glaucine) and alpha-tocopherol show seasonal variation for Croton hemiargyreus hemiargyreus and Croton echinocarpus. The amounts of triterpenes are higher during the tropical summer and in most samples the major sesquiterpene was characterized as caryophyllene. The seasonal variation of glaucine showed a maximum between June and October for C. hemiargyreus, and ...

A new flavone, named crotoncaudatin (1), was isolated from the stems of Croton caudatus Geisel. var. tomentosus Hook., together with nine known analogues: 3,5,6,7,8,3',4'-heptamethoxyflavone (2), tangeretin (3), nobiletin (4), 5,6,7,4'-tetramethoxy-flavone (5), sinensetin (6), kaempferol (7), tiliroside (8), kaempferol-3-O-rutinoside (9) and rutin (10). The structures of the above compounds wer...

Ten new cembranolides, (-)-(1R*,4R*,10R*)-4-methoxycembra-2E,7E,11Z-trien-20,10-olide (1), (-)-(1S*,4R*,10R*)-1-hydroxy-4-methoxycembra-2E,7E,11Z-trien-20,10-olide (2), (-)-(1S*,4S*,10R*)-1,4-dihydroxycembra-2E,7E,11Z-trien-20,10-olide (3), (-)-(1S*,4S*,10R*)-1,4-dihydroxycembra-2E,7E,11Z-trien-20,10-olide (4), (+)-(10R*)-cembra-1E,3E,7E,11Z,16-pentaen-20,10-olide (5), (+)-(10R*)-cembra-1Z,3Z,7...

In two experiments, f3-carotene applied to mice initiated with 7,12-dimethylbenz[a]anthracene (DMBA), concomitantly with croton resin and croton oil, increased tumor incidence by 58 and 29%. In the same experiments, retinyl acetate reduced tumor incidence by 76 and 29%. Retinol in one experiment reduced the number of papillomas by 75%. f3-lonone, squalene, and isoprene had little or no effect o...

An experimental local infection system has been developed in which exudates are induced with croton oil in granuloma pouches of rats. This system provided a suitable model for the evaluation of the therapeutic effect of two antibiotics, cefazolin and cephalothin. Exudate levels of cefazolin were found to be higher than those of cephalothin, and these levels correlated with the higher serum leve...

BACKGROUND Face-lift surgery when combined with perioral phenol-croton oil peel is an underappreciated tool for face rejuvenation. The procedure results in significant central face skin tightening and wrinkle reduction. METHODS A retrospective review of 47 consecutive patients who underwent simultaneous face lift and perioral peel was performed. The objective measures used to evaluate the cha...

Croton tiglium used as a cathartic in Ayurvedic system of indigenous medicine, was investigated for its effects in experimental animals. 50% EtOH extract of the dried nuts of the plant was used of the study. The extract exhibited a dose dependent cathartic effect in albino rats, the extract also showed an increase to gut movement with an increased contractile movement on rabbit jejunum, partial...