Targeting Bombesin Peptide Receptors for Cancer Imaging: Perspective in Prostate, Lung and Breast Cancer

One of the main reasons for focus on these particular cancer as prostate and breast cancers are the most common types cancer in men and women respectively. However small and non-small cell lung cancer are most frequent in both. The molecular basis for the utility of radiopeptides is due to their peptide receptor over expression by certain tumours [1]. Peptides are more important elements in fundamental biological processes due to their specificity for controlling various biological functions through their specific receptors naturally. The increased attention for peptides or their receptors for imaging cancer is due to their expression/over expression in many primary human cancers and their ability to target specific receptor. The clinical impact of radiolabelled peptides has been observed in theranostics by diagnosis of location of tumours and their metastases by receptor scintigraphy and by facilitating receptor radiotherapy of tumours for treatment. However, the research on peptide based radioligand seems to be slight aperture in the huge oncological area, but the receptor targeting by short peptide of over expressed receptors in tumours has become very important for cancer imaging [2].