128 results about "Tumor-infiltrating lymphocytes" patented technology

An embodiment of the invention provides a method of promoting regression of cancer in a mammal comprising obtaining a tumor tissue sample from the mammal; culturing the tumor tissue sample in a first gas permeable container containing cell medium therein; obtaining tumor infiltrating lymphocytes (TIL) from the tumor tissue sample; expanding the number of TIL in a second gas permeable container containing cell medium therein using irradiated allogeneic feeder cells and/or irradiated autologous feeder cells; and administering the expanded number of TIL to the mammal. Methods of obtaining an expanded number of TIL from a mammal for adoptive cell immunotherapy are also provided.

The invention includes compositions and methods to rapidly isolate and culture cells that are potent for use in adoptive immunotherapy. In one embodiment, the isolated cells of the invention are tumor infiltrating lymphocytes (TIL) that express CD137 (also known as 4-1BB and TNFSFR9).

Compositions and methods are described for highly sensitive quantification of the relative representation of DNA from adaptive immune cells (e.g., T and/or B lymphocytes) in DNA extracted from complex mixtures of cells that include cells which are not adaptive immune cells. Included are methods for determining the relative presence in a tumor of tumor infiltrating lymphocytes (TIL), the relative presence of lymphocytes infiltrating a somatic tissue that is the target of an autoimmune disease, and the relative presence of lymphocytes infiltrating a transplanted organ.

The present invention is drawn to methods for measuring numbers, levels, and/or ratios of cells, such as lymphocytes, infiltrated into a solid tissue, such as a tumor or a tissue affected by an autoimmune disease, and to methods for making patient prognoses based on such measurements. In one aspect, methods of the invention comprise sorting lymphocytes from an accessible tissue, such as peripheral blood, into functional subsets, such as cytotoxic T cells and regulatory T cells, and generating clonotype profiles of each subset. An inaccessible disease-affected tissue is sampled and one or more clonotype profiles are generated. From the latter clonotype profiles, levels lymphocytes in each of the functional subsets are determined in the disease-affected tissue by their clonotypes, which are identified from lymphocytes sorted into subsets from the accessible tissue.

A system associated with quantifying a density level of tumor-infiltrating lymphocytes, based on prediction of reconstructed TIL information associated with tumoral tissue image data during pathology analysis of the tissue image data is disclosed. The system receives digitized diagnostic and stained whole-slide image data related to tissue of a particular type of tumoral data. Defined are regions of interest that represents a portion of, or a full image of the whole-slide image data. The image data is encoded into segmented data portions based on convolutional autoencoding of objects associated with the collection of image data. The density of tumor-infiltrating lymphocytes is determined of bounded segmented data portions for respective classification of the regions of interest. A classification label is assigned to the regions of interest. It is determined whether an assigned classification label is above a pre-determined threshold probability value of lymphocyte infiltrated. The threshold probability value is adjusted in order to re-assign the classification label to the regions of interest based on a varied sensitivity level of density of lymphocyte infiltrated. A trained classification model is generated based on the re-assigned classification labels to the regions of interest associated with segmented data portions using the adjusted threshold probability value. An unlabeled image data set is received to iteratively classify the segmented data portions based on a lymphocyte density level associated with portions of the unlabeled image data set, using the trained classification model. Tumor-infiltrating lymphocyte representations are generated based on prediction of TIL information associated with classified segmented data portions. A refined TIL representation based on prediction of the TIL representations is generated using the adjusted threshold probability value associated with the classified segmented data portions. A corresponding method and computer-readable device are also disclosed.

The present invention provides improved and/or shortened methods for expanding TILs and producing therapeutic populations of TILs, including novel methods for expanding TIL populations in a closed system that lead to improved efficacy, improved phenotype, and increased metabolic health of the TILs in a shorter time period, while allowing for reduced microbial contamination as well as decreased costs. Such TILs find use in therapeutic treatment regimens.

The invention provides a humanized PD-L1 tumor cell line MC-38-hPD-L1, a builtanimal tumor model with the same and a method for constructing the humanized PD-L1 tumor cell line. The method particularly includes knocking out animal-origin PD-L1 by the aid of CRISPR-CAS9; carrying out amplification and cultivation to obtain knocked-out cell banks; extracting DNA (deoxyribonucleic acid) and carrying out PCR (polymerase chain reaction) amplification; recycling and cloning amplification products; carrying out over-expression on human-origin PD-L1 in MC-38 cell lines of mPD-L1 KO by the aid of lentivirus systems; packaging lentivirus and screening Puromycin to obtain the humanized MC-38 cell line of PD-L1. The humanized PD-L1 tumor cell line, the animal tumor model and the method have the advantages that as shown by results, high killing efficiency and multiplication capacity are obviously presented by tumor infiltration CD8 T lymphocytes after antibody treatment is carried out, tumor infiltration Treg cells can be obviously inhibited after antibody treatment is carried out, and accordingly the method is proved to be effective and feasible from the aspect of molecular mechanisms.

The invention relates to methods and compositions for the treatment and diagnosis of cancers. At least one aspect of the present invention relates to methods and compositions for enhancing the efficacy of tumor-infiltrating lymphocyte (TIL) therapy in the treatment of cancer by negatively modulating the activity of the CEACAM1 protein.

A method of determining responsiveness to cancer treatment is disclosed. The method comprises analyzing a frequency of tumor infiltrating lymphocytes (TILs) having a CD8⁺CD28⁻CD152⁻ signature in a sample of the subject, wherein a frequency of TILs having the CD8⁺CD28⁻CD152⁻ signature above a predetermined level is indicative of a positive responsiveness to cancer treatment. Other signatures reflecting responsiveness to cancer treatment are also disclosed. In addition, methods of treating cancer based on these signatures are also disclosed.

The present invention provides methods for producing and/or expanding tumor-infiltrating lymphocytes (TILs) that can be used in adoptive immunotherapy in cancer treatment.

The invention provides a method for in-vitro expansion of CD8<+>T cells. The method comprises steps as follows: TIL (tumor infiltrating lymphocyte) cells are extracted from a malignant pleural and peritoneal effusion source, cytokines IL-2, CD3McAb and PD-1 monoclonal antibodies are added to a TIL cell culture medium, the concentration of the IL-2 is 300-1,000 U/ml, the concentration of the CD3McAb is 10-50 ng/ml, and the concentration of the PD-1 monoclonal antibodies is 50-200 ng/ml. The cell factor combination adopted by the method can increase the TIL cell expansion multiple, effectively inhibit the negative regulation effect of Treg cells on the CD8<+>T cells and promote the anti-tumor effect.

The invention discloses a method for effectively culturing tumor infiltrating lymphocytes (TILs). The method comprises the following steps: extracting mononuclear cells from the pectoral ascite or tumor tissue of a patient, washing, inoculating into a culture bottle coated with recombinant human fibrin and cluster-of-differentiation-3 antibody, culturing for 24 hours, adding interleukin II, then using a serum-free culture medium containing the interleukin II and the supernatant pectoral ascite to enlarge and subculture every two or three days, and adding apoptosis-regulated protein survivin and mucoprotein-1 on the twelveth or thirteenth day to activate the killing activity; and harvesting cells on the fourteenth day. By adopting the method, the culture time, which is only 14 days, is greatly shortened, so that the hospital stays of the patient can be greatly shortened and the hospital burden of the patient can be reduced. Meanwhile, the problems that the cell proliferation speed is low and the proliferation ratio is low can be solved, thus the number of the cultured cells can meet the clinical requirement. The cultured TILs has strong cell specificity so as to enhance the clinical curative effect.

The invention relates to a tumor tissue tumor infiltrating lymphocyte (TIL) cell preparation method and a dedicated culture medium. The method comprises the following steps of tumor surrounding tissue obtaining, cell digestion, cell primary culture, cell subculture and cell collection, wherein a primary culture medium is based on a RPMI 1640 culture medium and prepared from the following concentration ingredients of 10% volume of human-derived serum, 20 to 45ng/ml of basic fibroblast growth factor (bFGF), 1 to 5mg/ml of riboflavin, 70 to 90ng/ml of cortisol, 10 to 25mg/ml of sodium dihydrogen phosphate monohydrate, 47 to 62ng/ml of recombinant human leukaemia inhibitory factor (LIF) and 500 to 800U/ml of IL-2; a subculture medium is based on the RPMI 1640 culture medium and prepared from the following concentration ingredients of 10% volume of the human-derived serum, 20 to 40mmol/L of HEPES, 1000 to 2000U/ml of the IL-2, 0.03 to 0.07mmol/L of beta-mercaptoethanol and 5 to 15ng/ml of sodium phosphate. According to the preparation method, an existing culture medium is improved, different culture mediums are utilized to culture the TIL cells in pertinence, TIL cell expansion capacity is improved, meanwhile a culture period is reduced, a culture complexity degree is reduced, a use amount of the IL-2 is reduced, and toxic reaction is reduced.

A method for generating an immune score, the method comprising the steps of: (i) determining a qualitative and/or quantitative assessment of tumor infiltrating lymphocytes in a sample; (ii) determining a qualitative and/or quantitative assessment of T-cell receptor signaling in the sample; (iii) determining a qualitative and/or quantitative assessment of mutation burden in the sample; (iv) generating, using a predictive algorithm, an immune score based on the determined qualitative and/or quantitative assessment of tumor infiltrating lymphocytes, the determined qualitative and/or quantitative assessment of T-cell receptor signaling, and the determined qualitative and/or quantitative assessment of mutation burden.

The invention discloses a dominant sequence GTM of a delta 1 chain complementary determining region (CDR) 3 in human gastric cancer tissue-derived tumor-infiltrating gamma delta T lymphocytes, a T cell receptor (TCR) containing the sequence, and TCR transfected cells. The amino acid residue sequence of the GTM is shown as SEQ ID NO.1 in a sequence table. Experiments prove that GTM peptide can be specifically combined with tumor cells, tumor tissue and V delta 1 T cell ligand MICA protein; and a J.RT3-T3.5 cell platform for expressing the TCR containing the dominant sequence GTM of the delta 1 chain CDR3 in the human gastric cancer tissue-derived tumor-infiltrating gamma delta T lymphocytes on a J.RT3-T3.5 surface is established by a lentivirus expression system, gamma delta 1 tumor-infiltrating lymphocytes (TIL) and a tumor identifying and killing mechanism thereof are simulated in the cell level, the killing activity of the transfected cells TCR gamma 4 delta 1 on the tumor cells is obviously increased, and the killing effect is TCR-dependent. The invention plays an important role in the development of medicines for treating malignant tumors and the adoptive treatment of malignant tumors, and has wide application prospects.

In some embodiments, methods of delivering a therapeutically effective amount of an expanded number of tumor infiltrating lymphocytes obtained from tumor remnants to a patient in need thereof, for the treatment of a cancer, are disclosed.

In some embodiments, compositions and methods relating to isolated artificial antigen presenting cells (aAPCs) are disclosed, including aAPCs comprising a myeloid cell transduced with one or more viral vectors, such as a MOLM-14 or a EM-3 myeloid cell, wherein the myeloid cell endogenously expresses HLA-AB/C, ICOS-L, and CD58, and wherein the one or more viral vectors comprise a nucleic acid encoding CD86 and a nucleic acid encoding 4-1BBL and/or OX40L and transduce the myeloid cell to express CD86 and 4-1BBL and/or OX40L proteins. In some embodiments, methods of expanding tumor infiltrating lymphocytes (TILs) with aAPCs and methods of treating cancers using TILs after expansion with aAPCs are also disclosed.