ECM components are taken up during growth, and some pistil molecules exert their effect inside the pollen tube. For instance, the Nicotiana alata 120-kD glycoprotein (120K) is an abundant arabinogalactan protein that is taken up from the ECM; it has been detected in association with pollen tube vacuoles, but the transport pathway between these compartments is unknown. We

recently identified a pollen C2 domain-containing protein (NaPCCP) that binds to the carboxyl-terminal domain of 120K. As C2 domain proteins mediate protein-lipid interactions, NaPCCP could function in intracellular transport of 120K in pollen tubes. Here, we describe binding studies showing that the NaPCCP C2 domain is functional and that binding is specific for phosphatidylinositol 3-phosphate. Subcellular GSK690693 fractionation,

immunolocalization, and live imaging results show that NaPCCP is associated with the plasma membrane and internal pollen tube vesicles. Colocalization between an NaPCCP::green fluorescent protein fusion and internalized FM4-64 suggest an association with the endosomal system. NaPCCP localization is altered in pollen tubes rejected by the self-incompatibility mechanism, but our hypothesis is that it has a general function in the transport of endocytic cargo rather than a specific function in self-incompatibility. NaPCCP represents a bifunctional protein with both phosphatidylinositol 3-phosphate- and AP26113 arabinogalactan protein-binding domains. Therefore, it could function in the transport of pistil ECM proteins in the pollen tube endomembrane system.”
“The JNK-IN-8 order objective of this study was to develop oral Chitosan beads containing Methotrexate, evaluating the relationship and

influence of different content levels of Span-80 (0.0, 0.5, 1.0, and 1.5% vol/vol), and Tripolyphosphate, TPP, (1.0, 2.0, and 3.0% wt/vol) on percentage recovery, surface morphology, drug content and in-vitro drug release. Methotrexate was chosen as the anti neoplastic drug because it is a Cell cycle (S or DNA synthetic) phase specific drug and Chitosan was used for controlled release properties. Chitosan beads were prepared using Ionotropic Gelation technique by dropping Methotrexate containing solution of positively charged, Chitosan, into Tripolyphosphate solution. The USP paddle method was selected to perform the dissolution studies carried out in 900 mL 0.1 N HCl. It was found that without span-80 the beads were irregular shaped with lots of fibers on the surface. The drug content obtained was 59.10 +/- 0.66%. It was observed that beads containing higher proportion of span-80 showed a faster release and the beads with higher proportion of TPP showed delayed release. In vitro drug release data showed that the formulations are useful for a sustained release of Methotrexate, due to 88.17% release of drug after twelve hours with t(50) and t(70) of 260 and 325 minutes, respectively.