Method for selecting cancer patients for whom combination therapy with retinoid and cancer therapeutic agent is effective, and combination medicament with retinoid and cancer therapeutic agent

A method for enhancing the action of a cancer therapeutic agent and/or for promoting the delivery of the cancer therapeutic agent to a target tumor tissue, comprising:

• selecting a cancer patient for whom a combination therapy with a retinoid and the cancer therapeutic agent is effective having a malignant tumor with an infiltration of cancer-associated fibroblasts (CAFs) in a stroma, wherein the step of selecting the cancer patient comprises preparing a histopathological specimen of a malignant tumor tissue obtained from the cancer patient to be examined and detecting at least one cancer-associated fibroblast under microscopic observation, and
• separately administering to the cancer patient the retinoid and the cancer therapeutic agent in the combination therapy to convert the CAFs in the stroma from cancer-promoting CAFs to cancer-suppressing CAFs.

A method for enhancing an action of a cancer therapeutic agent, comprising:

• selecting a cancer patient for whom a combination therapy with a retinoid and the cancer therapeutic agent is effective having a malignant tumor with an infiltration of cancer-associated fibroblasts (CAFs) in a stroma, wherein the step of selecting the cancer patient comprises preparing a histopathological specimen of a malignant tumor tissue obtained from the cancer patient to be examined and detecting at least one cancer-associated fibroblast under microscopic observation, and
• separately administering to the cancer patient a composition that overexpresses meflin in tumor tissue cells as an active ingredient and the cancer therapeutic agent in the combination therapy,
• wherein the composition that overexpresses meflin is selected from the group consisting of a retinoid, a viral vector containing a meflin gene, and a non-viral vector containing a meflin gene.

A method for treating a cancer patient, comprising:

• selecting a cancer patient for whom a combination therapy with a retinoid and a cancer therapeutic agent is effective having a malignant tumor with an infiltration of cancer-associated fibroblasts (CAFs) in a stroma, wherein the step of selecting the cancer patient comprises preparing a histopathological specimen of a malignant tumor tissue obtained from the cancer patient to be examined and detecting at least one cancer-associated fibroblast under microscopic observation, and
• separately administering to the cancer patient an agent that induces the suppression of the lysyl oxidase activity in the stroma of cancer and the cancer therapeutic agent in the combination therapy,
• wherein the agent that induces the suppression of the lysyl oxidase activity in the stroma of cancer is selected from the group consisting of a LOX inhibitor, an anti-LOX neutralizing antibody, a retinoid, a viral vector containing a meflin gene, and a non-viral vector containing a meflin gene.

A method for enhancing an action of a cancer therapeutic agent and/or for promoting the delivery of the cancer therapeutic agent to a target tumor tissue, comprising:

• selecting a cancer patient for whom a combination therapy with a retinoid and the cancer therapeutic agent is effective having a malignant tumor with an infiltration of cancer-associated fibroblasts (CAFs) in a stroma, wherein the step of selecting the cancer patient comprises preparing a histopathological specimen of a malignant tumor tissue obtained from the cancer patient to be examined and detecting at least one cancer-associated fibroblast under microscopic observation, and
• separately administering to the cancer patient an agent that induces the suppression of the lysyl oxidase activity in the stroma of cancer and the cancer therapeutic agent in the combination therapy,
• wherein the agent that induces the suppression of the lysyl oxidase activity in the stroma of cancer is selected from the group consisting of a LOX inhibitor, an anti-LOX neutralizing antibody, a retinoid, a viral vector containing a meflin gene, and a non-viral vector containing a meflin gene.