The majority of CMs are polyploid, caused either by an increase in nuclearity with ~90%% binuclear ventricular CMs in mouse [ 37, 43] and rat [ 21], and 25.5 61.9 % in humans [ 8, 29] or by increased nuclear ploidy up to 8N in humans [ 24] and 16N in mice [ 43].
We reported recently that histamine plays a critical role in the pathogenesis of experimental cerebral malaria (CM) in mice infected with Plasmodium berghei ANKA.
Experimental cerebral malaria (CM) in mice is a severe pathological condition resulting from infection with particular strains of Plasmodium parasites, namely Plasmodium berghei ANKA strain (Pb ANKA).
For an animal carrying a single tumour, the mean diameter should not normally exceed 1.2 cm in mice or 2.5 cm in rats, or 1.5 and 2.8 cm, respectively, for therapeutic studies.
A threshold of 20 cm in mice was also suggested by the instillation of relatively high mass doses of quite different particle species by Lison et al. (1997), namely, insoluble manganese dioxide dusts.
Interestingly, although enteroendocrine cells represent less than 1% of the total cellular gastrointestinal tract, Lkb1 deletion in the proglucagon-expressing cell population led to the development of tumours averaging in size between 1 to 3 cm in mice aged between 120 and 156 days, selectively in the duodenum.
This rate is higher than the genome wide average of 0.56 cM/Mb [40], and the genetic length of Chromosome 11 in this cross is very close to the length of Chromosome11 from the integrated map (83.1 cM) reported in Mouse Genome Database [41] and from the recently published revised map (80.85 cM) [35].
When tumors were approximately 1.0 cm in size, mice were euthanized and tumors were excised.
When the control tumor reached approximately 1 cm in length, mice were sacrificed and the tumor excised, weighed and frozen.
When tumors reached 1 cm in diameter, mice were sacrified and each tumor was fixed in formol and photographed.
