内科: オープンアクセス
オープンアクセス

概要

Teaching an old dog new trick: Genetic profiling predicts response in elderly acute myeloid leukemia treated with old/new drugs combos

Giuseppe Visani

Older patients with acute myeloid leukemia (AML) have poor outcome; new effective therapies are needed. We hypothesized that the addition of tosedostat, a new amino peptidase inhibitor, or lenalidomide, to low dose cytarabine may improve response over what expected with chemotherapy or tosedostat alone. 66 patients were treated with lenalidomide/arac, 33 with tosedostat/ arac (sample sizes according to MiniMax design). The primary outcome was complete remission rate (CR+CRi). To identify sensitivity biomarkers, global gene expression profiling (GEP) was performed on purified AML cells. Lena/arac combo: CR rate was 36.3% (24/66 patients), with an overall response rate (ORR) of 39.3% (26/66). Responding patients had a longer median overall survival than non-responders (375 vs. 70.5 days, P<0.0001). A molecular signature was identified, including 306 genes and 3 miRNA associated with the clinical response, predictable with high accuracy. Concerning the second combo, CR rate was 48.5% with an overall response rate of 54.6%. Responding patients (CR+PR) had a longer median overall survival than non-responders (P=0.018). GEP identified a molecular signature associated with the clinical response, efficiently predicted (overall accuracy exceeding 90%). In conclusion, these data are promising in view of producing companion tests for therapies in elderly AML; and intriguing when thinking at the potential interactions of older drugs with new molecules on gene expression and response to therapy.A rapidly dynamic dangerous sickness in which there are such a large number of juvenile blood-shaping cells in the blood and bone marrow, the phones being explicitly those bound to offer ascent to the granulocytes or monocytes, the two kinds of white platelets that battle diseases. In AML, these impacts don’t develop thus become excessively various. AML can happen in grown-ups or youngsters. Intense myeloid leukemia is abridged AML (articulated A M L). It is otherwise called intense myelogenous leukemia or intense nonlymphocyticleukemia (ANLL). The early indications of AML might be like this season’s flu virus or other regular ailments with fever, shortcoming and exhaustion, loss of weight and hunger, and a throbbing painfulness during the bones or joints. Different indications of AML may remember small red spots for the skin, simple wounding and dying, visit minor contaminations, and helpless mending of minor cuts. To start with, blood tests are done to tally the quantity of every one of the various types of platelets and see whether they are inside typical extents. In AML, the red platelet levels might be low, causing iron deficiency; platelet levels might be low, causing draining and wounding; and the white platelet levels might be low, prompting contaminations. A bone marrow biopsy or a bone marrow desire might be done if the consequences of the blood tests are irregular. During a bone marrow biopsy, an empty needle is embedded into the hip issue that remains to be worked out a modest quantity of the marrow and bone for assessment under a magnifying instrument. In a bone marrow suction, a little example of fluid bone marrow is pulled back through a needle. A lumbar cut, or spinal tap, might be done to check whether the illness has spread into the cerebrospinal liquid, which encompasses the focal sensory system (CNS) - the cerebrum and spinal string. Other key demonstrative tests may incorporate stream cytometry (in which cells are gone through a laser pillar for examination), immunohistochemistry (utilizing antibodies to recognize sorts of malignant growth cells), cytogenetics (to decide chromosome changes in cells), and sub-atomic hereditary investigations (DNA and RNA trial of the disease cells). The essential treatment of AML is chemotherapy. Radiation treatment is more uncommon; it might be utilized in specific cases. Bone marrow transplantation is under investigation in clinical preliminaries and is coming into expanding use. There are two periods of treatment for AML. The primary stage is called enlistment treatment. The motivation behind acceptance treatment is to execute whatever number of the leukemia cells as could be allowed and incite a reduction, a state wherein there is no obvious proof of malady and blood tallies are ordinary. Patients may get a blend of medications during this stage including daunorubicin, idarubicin, or mitoxantrone in addition to cytarabine and thioguanine. Once disappearing without any indications of leukemia, patients enter a second period of treatment. The second period of treatment is called post-abatement treatment (or continuation treatment). It is intended to execute any remaining leukemic cells. In post-reduction treatment, patients may get high portions of chemotherapy, intended to kill any remaining leukemic cells. Treatment may incorporate a blend of cytarabine, daunorubicin, idarubicin, etoposide, cyclophosphamide, mitoxantrone, or cytarabine. There are various distinctive subtypes of AML. AML is ordered utilizing a framework called the French American British (FAB) framework. In the this framework, the subtypes of AML are gathered by the specific cell line in which the sickness created. There are eight particular kinds of AML, assigned M0 through M7. Types M2 (myeloblasticleukemia with development) and M4 (myelomonocyticleukemia) each record for 25% of AML; M1 (myeloblasticleukemia, with few or no develop cells) represents 15%; M3 (promyelocyticleukemia) and M5 (monocyticleukemia) each record for 10% of cases; the different subtypes are infrequently observed. AML is likewise arranged by the chromosomal variations from the norm in the dangerous cells. The treatment of the subtype of AML called intense promyelocyticleukemia (APL) contrasts from that for different types of AML. (APL is M3 in the FAB framework.) Most APL patients are currently rewarded first with all-trans-retinoic corrosive (ATRA) which initiates a total reaction in 70% of cases and broadens endurance. APL patients are then given a course of union treatment, which is probably going to incorporate cytosine arabinoside (Ara-C) and idarubicin. Bone marrow transplantation is utilized to supplant the bone marrow with solid bone marrow. In the first place, the entirety of the bone marrow in the body is wrecked with high dosages of chemotherapy with or without radiation treatment. Sound marrow is then taken from someone else (a contributor) whose tissue is equivalent to or nearly equivalent to the patient’s. The giver might be a twin (the best match), a sibling or sister, or an individual who is in any case related or not related. The solid marrow from the giver is given to the patient through a needle in the vein, and the marrow replaces the marrow that was pulverized. A bone marrow relocate utilizing marrow from a family member or from an individual who isn’t connected is called an allogeneic bone marrow relocate. A more prominent possibility for recuperation happens if the specialist picks an emergency clinic that accomplishes in excess of five bone marrow transplantations for every year. The general possibility of recuperation (the drawn out anticipation) relies upon the subtype of AML and the patient’s age and general wellbeing.