Abstract: The invention described relates to the newly discovered ability of tumor internalizing arginylglycylaspartic acid (iRGD) peptides to alter the immune cell landscape in pancreatic ductal adenocarcinoma (PDAC) and other cancers. The iRGD peptides sensitize the cancer to immune checkpoint inhibitors, for example anti-PD-L1, anti-PD-L1, anti-PD-1, and anti-CTLA4 monoclonal antibodies to specifically deplete Tregs within the tumor, resulting in expansion of intratumoral CD8+ T cells (effector cells). This provides methods of treating cancers such as PDAC, preferably in synergistic combination with chemotherapy and immunotherapy, which leads to reduced tumor burden and prolonged survival.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are peptides and peptidomimetics that in some embodiments include the amino acid sequence KRGARST or (SEQ ID NO: 1), AKRGARSTA or (SEQ ID NO: 2), or CKRGARSTC (SEQ ID NO: 3).

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are peptides and peptidomimetics that in some embodiments include the amino acid sequence KRGARST or (SEQ ID NO: 1), AKRGARSTA or (SEQ ID NO: 2), or CKRGARSTC (SEQ ID NO: 3).

Abstract: Disclosed are peptides and peptidomimetics that in some embodiments include the amino acid sequence KRGARST or (SEQ ID NO: 1), AKRGARSTA or (SEQ ID NO: 2), or CKRGARSTC (SEQ ID NO: 3).

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences, such as truncated LyP-1 peptides, that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are peptides and peptidomimetics that in some embodiments include the amino acid sequence KRGARST or (SEQ ID NO: 1), AKRGARSTA or (SEQ ID NO: 2), or CKRGARSTC (SEQ ID NO: 3).

Abstract: Disclosed are compositions and methods related to multivalent compositions targeted to cells and tissues. The disclosed targeting is useful for treatment of cancer and other diseases and disorders.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences, such as truncated LyP-1 peptides, that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins. The compositions and methods are based on peptide sequences that selectively bind to and home to tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins in animals. The disclosed targeting is useful for delivering therapeutic and detectable agents to tissue experiencing angiogenesis or to cells or tissue expressing ?v integrins.

Abstract: Disclosed are compositions and methods useful for targeting tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins. The compositions and methods are based on peptide sequences that selectively bind to and home to tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins in animals. The disclosed targeting is useful for delivering therapeutic and detectable agents to tissue experiencing angiogenesis or to cells or tissue expressing ?v integrins.

Abstract: Disclosed are compositions and methods useful for targeting tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins. The compositions and methods are based on peptide sequences that selectively bind to and home to tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins in animals. The disclosed targeting is useful for delivering therapeutic and detectable agents to tissue experiencing angiogenesis or to cells or tissue expressing ?v integrins.

Abstract: Disclosed are compositions and methods related to multivalent compositions targeted to cells and tissues. The disclosed targeting is useful for treatment of cancer and other diseases and disorders.

Abstract: Disclosed are compositions and methods useful for targeting and internalizing molecules into cells of interest and for penetration by molecules of tissues of interest. The compositions and methods are based on peptide sequences that are selectively internalized by a cell, penetrate tissue, or both. The disclosed internalization and tissue penetration is useful for delivering therapeutic and detectable agents to cells and tissues of interest.

Abstract: Disclosed are compositions and methods useful for targeting tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins. The compositions and methods are based on peptide sequences that selectively bind to and home to tissue undergoing angiogenesis or to cells or tissue expressing ?v integrins in animals. The disclosed targeting is useful for delivering therapeutic and detectable agents to tissue experiencing angiogenesis or to cells or tissue expressing ?v integrins.