The idea of anti-angiogenic therapy was the brain child of Dr. Judah Folkman in the early 1970s. He proposed that by cutting the blood supply off, cancer cells can be deprived of nutrients and hence treated. His efforts were paid off when Bevacizumab (Avastin®), a monoclonal antibody against the vascular endothelial growth factor (VEGF) was first approved for anti-angiogenic therapy in 2004 for the treatment of breast cancer. Since then, an array of anti-angiogenic inhibitors were developed, used in clinical trials and many got approved for use for the treatment of multiple cancers, alone or in combination with other cytotoxic/chemotherapy drugs. Despite this important breakthrough, anti-angiogenic therapy for cancer met with a number of hurdles on its way to be one of the options for cancer therapy. Herein, we summarize the latest update on the current knowledge on the mechanisms of tumor angiogenesis, pro- and anti-angiogenic factors, potential targets and their mechanisms of action, experimental evidences and the most recent data on the clinical trials on anti-angiogenic agents for cancer therapy.

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Regardless of practice setting, it is imperative that pharmacists be able to either participate in generating new knowledge or use the ever-expanding body of literature to guide patient care. However, competing priorities in Pharm.D. curricula and residency training programs have resulted in limited emphasis on acquiring research and scholarly skills. Factors likely contributing to this reduced focus include the lack of curricular and postgraduate training standards emphasizing the development of research skills, time to commit to scholarly activity, and accessibility to experienced mentors. Strategies for increasing scholarly activity for pharmacy students and residents should therefore continue to be a focus of professional degree and residency training programs. Several resources are available for academic planners, program directors, and institutions to augment scholarly experience for pharmacy trainees and clinicians. This commentary highlights the importance of providing research opportunities for students and residents, describes the potential barriers to these activities, and provides recommendations on how to increase the instruction and mentoring of trainees to generate and use research.

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Peripheral blood progenitor cell mobilization with intermediate-dose cyclophosphamide (ID-CY) and granulocyte colony-stimulating factor (G-CSF) has been shown to be more efficacious, albeit more toxic, than low-dose cyclophosphamide (LD-CY) mobilization regimens in patients with multiple myeloma treated with conventional therapies. However, the relative importance of cyclophosphamide dose intensity in peripheral blood progenitor cell mobilization after novel induction regimens is not known. Here we report mobilization outcomes of 123 patients who underwent transplantation within 1 year of starting induction chemotherapy with novel agents. We compared consecutive patients undergoing mobilization with ID-CY/G-CSF (3-4 g/m(2)) at one institution (n = 55) with patients receiving LD-CY/G-CSF (1.5 g/m(2)) at a different transplantation center (n = 68). At baseline, the 2 groups were well balanced, except for more frequent previous lenalidomide use in the ID-CY group (P = .04). Compared with LD-CY, ID-CY use was associated with higher median peak PB CD34(+) cell count (35/μL versus 160/μL; P < .001), CD34(+) cell yield on day 1 of collection (2.6 × 10(6)/kg versus 11.7 × 10(6)/kg, P ≤ .001), and total CD34(+) cell yield (7.5 × 10(6)/kg versus 16.6 × 10(6)/kg; P ≤ .001). Six patients in the LD-CY group had mobilization failure, compared with no patients in the ID-CY group. A significantly higher proportion of patients in the LD-CY group (P < .001) were unable to collect ≥5 × 10(6)/kg and ≥10 × 10(6)/kg CD34(+) cells. Neutrophil and platelet engraftment were significantly faster in the ID-CY group, likely because of higher infused CD34(+) cell doses. In conclusion, compared with LD-CY, ID-CY produced a more robust peripheral blood progenitor cell mobilization and significantly reduced the rates of mobilization failure. These data caution against the use of LD-CY-containing mobilization strategies in patients with multiple myeloma undergoing stem cell collection after novel induction regimens.

Angiotensin II type 1 receptor antagonists [ARBs (angiotensin receptor blockers)] are indicated for BP (blood pressure)-lowering, renal protection and cardioprotection in patients unable to tolerate ACEIs (angiotensin-converting enzyme inhibitors). A recent meta-analysis revealed an association between ARBs and tumour development, possibly due to enhancement of angiogenesis. However, published evidence is conflicting on the effects of ARBs on angiogenesis or the expansion of the existing vascular network. ARBs have been shown to exert primarily anti-angiogenic effects in basic science studies of cancer, retinopathy, peripheral artery disease and some models of cardiovascular disease. In animal and cellular models of myocardial infarction and stroke, however, ARB administration has been associated with robust increases in vascular density and improved recovery. The aim of the present review is to examine the angiogenic effects of ARBs in animal and cellular models of relevant disease states, including proposed molecular mechanisms of action of ARBs and the clinical consequences of ARB use.

Recent studies suggest a positive correlation between glycogen synthase kinase-3 (GSK-3) activation and tumor growth. Currently, it is unclear how both Akt that inhibits GSK-3 and active GSK-3 are maintained concurrently in tumor cells. We investigated the role of GSK-3 and the existence of an Akt-resistant pathway for GSK-3 activation in prostate cancer cells. Our data show that Src, a non-receptor tyrosine kinase is responsible for Y216GSK-3 phosphorylation leading to its activation even when Akt is active. Experiments involving mouse embryonic fibroblasts lacking cSrc, Yes and Fyn, as well as Src activity modulation in prostate cancer cells with constitutively active (CA-Src) and dominant negative Src (DN-Src) plasmids demonstrated the integral role of Src in Y216GSK-3 phosphorylation and activity modulation. Inhibition of GSK-3 with SB415286 in PC3 cells resulted in impaired motility, proliferation and colony formation. Treatment of PC3 cells with the Src inhibitor dasatinib reduced Y216GSK-3 phosphorylation and inhibited proliferation, invasion and micrometastasis in vitro. Dasatinib treatment of athymic nude mice resulted in impaired growth of PC3 cell tumor xenograft. Together, we provide novel insight into the Src-mediated Y216GSK-3 phosphorylation and activation in prostate cancer cells and reveal the potential benefits of targeting Src-GSK-3 axis using drugs such as dasatinib.

Studies comparing the efficacy and cost of stem cell mobilization with intermediate-dose CY (ID-CY) and G-CSF against plerixafor and G-CSF, specifically in multiple myeloma (MM) patients treated in the novel therapy era, are not available. Eighty-eight consecutive patients undergoing mobilization with ID-CY (3-4 g/m 2 ) and G-CSF (n ¼ 55) were compared with patients receiving plerixafor and G-CSF (n ¼ 33). Compared with plerixafor, ID-CY use was associated with higher median peak peripheral blood CD34 þ cell count (68 vs 160 cells/mL, Po0.001), and CD34 þ cell yield on day 1 of collection (6.9 Â 10 6 vs 11.7 Â 10 6 cells/kg, Po0.001). Total CD34 þ cell yield was significantly higher in the ID-CY patients (median collection 16.6 Â 10 6 vs 11.6 Â 10 6 cells/kg; Po0.001). ID-CY use was associated with significantly more frequent episodes of febrile neutropenia (16.3% vs 0%; P ¼ 0.02), intravenous antibiotic use (16.3% vs 3%; P ¼ 0.03) and hospitalizations (P ¼ 0.02). The average total cost of mobilization in the plerixafor group was significantly higher compared with the ID-CY group ($28 980 vs $22 504.8; P ¼ 0.001). Our data indicate robust stem cell mobilization in MM patients treated with novel agents, with G-CSF and either ID-CY or plerixafor. When compared with plerixafor, ID-CY-containing mobilization was associated with significantly lower average total mobilization costs.