Chronic Myelogenous Leukemia Research Articles

AS1041, a novel derivative of marine natural compound Aspergiolide A, induces senescence of leukemia cells via oxidative stress-induced DNA damage and BCR-ABL degradation

Chronic myelogenous leukemia (CML) is characterized by the constitutive activation of BCR-ABL tyrosine kinase. Imatinib was approved for CML therapy, however, BCR-ABL-dependent drug resistance, especially BCR-ABL-T315I mutation, restricts its clinical application. In this study, we reported anthraquinone lactone AS1041, a synthesized derivative of marine natural compound Aspergiolide A, showed anti-leukemia effect in vitro and in vivo by promoting cell senescence. Mechanistic study revealed the pro-senescence effect of AS1041 was dependent on oxidative stress-induced DNA damage, and the resultant activation of P53/P21 and P16INK4a/Rb. Also, AS1041 promoted ubiquitin proteasome system (UPS)-mediated BCR-ABL degradation, which also contributed to AS1041-induced senescence. In vivo, AS1041-induced senescence promoted tumor growth inhibition. In summary, the in vitro and in vivo antitumor effect of AS1041 suggests it can serve as a pro-senescence agent for alternative antileukemia therapy and imatinib-resistant cancer therapy by enhancing cellular oxidative stress and BCR-ABL degradation.

L‐lysine Janus Dendrimer Conjugate with Naproxen and Mefenamic Acid and its Anticancer Activity

AbstractDendritic architectures have potential use as excellent carriers for drug delivery due to their multifunctionality, biopermeability, and biodegradability properties. Furthermore, their conjugation with non‐steroidal anti‐inflammatory drugs (NSAIDs) results in a synergetic effect improving their anticancer activity. Here we report the synthesis and cytotoxic activity of novel Janus dendrimer conjugates with naproxen and mefenamic acid moieties at the periphery. Diethanolamine dendrons were convergently synthesized through a protection‐deprotection sequence with naproxen as a terminal group and finally coupled to triethylene glycol as a linker. On the other hand, mefenamic acid was covalently joined to the L‐lysine. The dendron and dendrimer‐conjugates with naproxen and mefenamic acid showed high inhibition and selectivity against PC‐3 (human prostatic adenocarcinoma), and K‐562 (human chronic myelogenous leukemia) cell lines, but low cytotoxicity against normal cell lines. To explain the molecular mechanisms involved in the anticancer activity of dendrimer conjugates, our research will be continued.

Therapeutic Choices in Patients with Ph-Positive Chronic Myelogenous Leukemia In Mexico in the Era of Tyrosine Kinase Inhibitors: Stem Cell Transplantation or Tyrosine Kinase Inhibitors? Fifteen Years Later.

Background: Chronic myelogenous leukemia is a neoplastic proliferation of the granulocytic series. In Mexico, chronic myelogenous leukemia accounts for approximately 10% of all leukemias. Tyrosine-kinase inhibitors are considered front-line therapy in high-income countries, whereas allogeneic hematopoietic stem cell transplantation is a recognized therapeutic approach, mainly in low- and middle-income countries. Objective: To analyze the overall survival of persons with chronic myelogenous leukemia who have received tyrosine-kinase inhibitors or allogeneic hematopoietic stem cell transplantation in a medical center, since 1994, and briefly discuss the current indications of these treatments in the tyrosine-kinase inhibitors era. Methods: We retrospectively analyzed all patients with a diagnosis of chronic myelogenous leukemia treated in a medical center between 1994 and 2023; subsets of individuals who received an allogeneic hematopoietic stem cell transplantation or tyrosine-kinase inhibitors therapy as first-line treatment were analyzed. Results: 60 persons with chronic myelogenous leukemia were treated with allogeneic hematopoietic stem cell transplantation or tyrosine-kinase inhibitors: 35 received an allogeneic hematopoietic stem cell transplantation, whereas 25 were given tyrosine-kinase inhibitors. All patients who underwent an allogeneic hematopoietic stem cell transplantation engrafted successfully, and the procedure was completed on an outpatient basis in most cases (29/35). The median survival in allogeneic hematopoietic stem cell transplantation was 78.3 months (CI 95%: 0-205.6) and in persons given tyrosine-kinase inhibitors the median was not reached. Conclusion: Tyrosine-kinase inhibitors were significantly superior to allogeneic hematopoietic stem cell transplantation in prolonging the overall survival of persons with chronic myelogenous leukemia in our single institution experience. (Rev Invest Clin. 2024;76(2):91-6).

Enabling biomedical technologies for chronic myelogenous leukemia (CML) biomarkers detection.

Chronic myelogenous/myeloid leukemia (CML) is a type of cancer of bone marrow that arises from hematopoietic stem cells and affects millions of people worldwide. Eighty-five percent of the CML cases are diagnosed during chronic phase, most of which are detected through routine tests. Leukocytes, micro-Ribonucleic Acids, and myeloid markers are the primary biomarkers for CML diagnosis and are mainly detected using real-time reverse transcription polymerase chain reaction, flow cytometry, and genetic testing. Though multiple therapies have been developed to treat CML, early detection still plays a pivotal role in the overall patient survival rate. The current technologies used for CML diagnosis are costly and are confined to laboratory settings which impede their application in the point-of-care settings for early-stage detection of CML. This study provides detailed analysis and insights into the significance of CML, patient symptoms, biomarkers used for testing, and best possible detection techniques responsible for the enhancement in survival rates. A critical and detailed review is provided around potential microfluidic devices that can be adapted to detect the biomarkers associated with CML while enabling point-of-care testing for early diagnosis of CML to improve patient survival rates.

Alteration of Blood Group in a Patient with Chronic Myelogenous Leukemia

Alteration of Blood Group in a Patient with Chronic Myelogenous Leukemia

Fertility preservation in patients with hematopoietic diseases

The prognosis of hematopoietic diseases has been improving over the past several decades, and measures to fulfill patients' wishes to have children are needed to improve survivors' quality of life. In Japan, the Japan Society for Fertility Preservation has taken the lead in developing guidelines, a national registry, and a nationwide uniform subsidy system. When considering fertility preservation in patients with hematopoietic diseases, interdisciplinary collaboration between oncology and onco-fertility is necessary to solve problems specific to hematopoietic diseases, such as the short time window between the onset of disease and the start of treatment, complications associated with fertility preservation treatment such as bleeding or ovarian hyperstimulation syndrome, and contamination of collected tissue with hematopoietic tumor cells. This article outlines the basic concept of fertility preservation in patients with hematopoietic diseases and recently established strategies for women with chronic myelogenous leukemia. It will also share some treatment innovations that can be considered in cases when fertility preservation treatment may be challenging.

A label free chemoproteomic-based platform to disclose cannabidiol molecular mechanism of action on chronic myelogenous leukemia cancer cells

The discovery of the interactome of cannabidiol (CBD), a non-psychoactive cannabinoid from Cannabis sativa L., has been here performed on chronic myelogenous leukemia cancer cells, using an optimized chemo-proteomic stage, which links Drug Affinity Responsive Target Stability with Limited Proteolysis Multiple Reaction Monitoring approaches. The obtained results showed the ability of CBD to target simultaneously some potential protein partners, corroborating its well-known poly-pharmacology activity. In human chronic myelogenous leukemia K562 cancer cells, the most fascinating protein partner was identified as the 116 kDa U5 small nuclear ribonucleoprotein element called EFTUD2, which fits with the spliceosome complex. The binding mode of this oncogenic protein with CBD was clarified using mass spectrometry-based and in silico analysis.

Apoptotic effect of Bulbine Natalensis and Chlorophytum Comosum in myelogenous Leukemia K562 cell line.

Bulbine natalensis and Chorophytum comosum are potential medicinal source for the treatment of cancers. Chronic myeloid leukaemia is a hematopoietic stem cells disorder treated by tyrosine kinase inhibitors but often cause recurrence of the leukaemia after cessation of therapy, hence require alternative treatment. This study determines the anti-cancer effect of leaf, root and bulb methanolic and aqueous extracts of B. natalensis and C. comosum in chronic human myelogenous leukaemia (K562) cell line by MTT, Hoechst bis-benzimide nuclear and annexin V stain assays. The root methanolic extract of B. natalensis and C. comosum showed a high cytotoxicity of 8.6% and 16.7% respectively on the K562 cell line at 1,000 μg/ml concentration. Morphological loss of cell membrane integrity causing degradation of the cell and fragmentation were observed in the root methanolic extract of both plants. A high apoptosis (p < 0.0001) was induced in the K562 cells by both leaf and root extracts of the C. comosum compared to the B. natalensis. This study shows both plants possess apoptotic effect against in vitro myelogenous leukaemia which contributes to the overall anti-cancer properties of B. natalensis and C. comosum to justify future therapeutic applications against chronic myelogenous leukaemia blood cancer.

Cost-effectiveness analysis in the treatment of hematologic malignancies

Recent advancements in treatment have improved the prognosis of hematologic malignancies. However, the increasing cost of therapeutic drugs has become an urgent issue. Cost-effectiveness analysis is performed using the incremental cost-effective ratio (ICER), a value calculated by dividing the incremental cost by the incremental quality-adjusted life year (QALY). The ICER must be compared with the willingness-to-pay (WTP) threshold, which differs between countries. Since the analysis should be made over a long time horizon, it is necessary to model and extrapolate the long-term outcomes of clinical trials to calculate cumulative costs and QALYs. This article discusses several approaches to cost-effectiveness analysis for chronic myelogenous leukemia, multiple myeloma, and CAR-T therapy. As even expensive treatments could be cost-effective if they provide long treatment-free survival, it is essential to judge cost-effectiveness by an appropriate method, rather than price alone.

Therapeutic drug monitoring of imatinib in patients with chronic myeloid leukaemia: Experience from Oran HUE

Imatinib, a first-line treatment for chronic myelogenous leukemia, presents significant interindividual pharmacokinetic variability. The correlation between the plasma exposure of Imatinib and its pharmacological effects makes this drug a good candidate for pharmacological therapeutic monitoring in addition to the usual monitoring tests. We introduced monitoring of Imatinib in 27 patients suffering from chronic myelogenous leukemia. According to the dosage results, dosage adaptation recommendations were proposed to clinicians in patients outside the targeted therapeutic range. The goal was to achieve an optimal response to Imatinib, prevent its adverse effects and improve adherence to treatment.

Long-term results of therapy for chronic myeloid leukemia: a 20-year analysis of the use of tyrosine kinase inhibitors in Russia

Introduction. In Russia, within the framework of the GIPAP program, in the period from 2001 to 2007 at the National Medical Research Center for Hematology, imatinib therapy was initiated in 235 patients in the chronic phase of chronic myelogenous leukemia (CML).Aim: to analyze the long-term results of therapy in patients with CML who started imatinib therapy as part of the GIPAP program.Methods. A retrospective analysis of the results of therapy was performed in 235 patients with СР CML, who received imatinib under the GIPAP program from 2001 to 2007 at the National Medical Research Center for Hematology. The protocols for therapy and monitoring of the residual disease of patients at various time intervals were determined by the clinical recommendations relevant at that time in the conditions of real clinical practice and the possibilities of the patient’s region of residence. Overall survival and survival without discontinuation of imatinib therapy, univariate and multivariate analysis of overall survival were performed. The cumulative incidence of responses was calculated. An analysis of response factors, the probability of death from concomitant diseases and death from CML was carried out.Results. The median follow-up of living patients at the time of analysis was 17.3 years (IQR 15.5–18.5). 70 (30 %) patients died, with the median time to death from the start of therapy being 7.8 years (IQR 3.7–13.6). The overall 10-year, 15-year and 20-year survival rates were 82 %, 74 % and 62 %. The cause of death in 43 cases (61%) was the progression of CML to the phase of acceleration or blast crisis and death out of remission for an unspecifi ed cause. 27 (39%) patients died from causes not related to CML. Patient age at initiation of imatinib therapy, length of time from diagnosis to initiation of imatinib therapy, and Sokal and ELTS risk groups at disease onset were identifi ed as signifi cant for survival by univariate analysis. Multivariate analysis showed independent predictive value for overall survival for age at initiation of imatinib therapy, length of illness before imatinib treatment, and ELTS risk group at disease onset. Among patients who died from CML progression, the proportion of patients who did not achieve CCyR for the entire period of therapy before death was 83% (35/42), while among patients who died from concomitant diseases, the proportion of patients without CCyR for the entire period of therapy was 11 % (p &lt; 0.0001). The median duration of imatinib therapy was 11.4 years (0.8–21 years). 40 people died during imatinib therapy, 103 patients are alive and continue therapy with imatinib, 92 patients received at least one second-generation of Tyrosine kinase inhibitors (TKI) (TKI2), of which 62 people are alive and continue treatment with TKI. No more than two lines of TKI therapy were received by 49 (21 %) patients, and three or more lines were prescribed to 43 (18 %) patients. The median duration of therapy after switching to TKI2 was 7.8 years (0.1–15.6 years). Overall 15-year survival after switching to TKI2 was 59 %. On therapy with imatinib, during the entire observation period, complete cytogenetic response (CCyR) was achieved in 171 patients (73 %), another 18 patients (8 %) achieved CCyR for the fi rst time after switching to TKI2. Major (MMR) and deep molecular response (DMR) were achieved with imatinib in 129 (56 %) and 124 (53 %) patients, with TKI2 TKI2 therapy in 38 (16 %) and 33 (14 %) patients, respectively. Multivariate analysis showed an independent predictive value of only the time period from diagnosis to the start of imatinib treatment for achieving molecular responses to TKI therapy.Conclusion. After 20 years of monitoring patients on TKI therapy, we still cannot say that survival in CML is comparable to the survival of normal population. Long-term follow-up confi rms the fact that tumor reduction to at least the level of CCyR is the most signifi cant surrogate marker associated with a reduced risk of death from CML. Timely diagnosis of the disease, rapid initiation of targeted therapy and the fastest possible induction of cytogenetic and molecular responses is a very important mechanism for reducing the risk of resistant course and progression of CML.

Indirubin mediates adverse intestinal reactions in guinea pigs by downregulating the expression of AchE through AhR

ABSTRACT Indirubin is the main component of the traditional Chinese medicine Indigo naturalis (IN), a potent agonist of aryl hydrocarbon receptors (AhRs). In China, IN is used to treat psoriasis and ulcerative colitis, and indirubin is used for the treatment of chronic myelogenous leukaemia. However, IN and indirubin have adverse reactions, such as abdominal pain, diarrhoea, and intussusception, and their specific mechanism is unclear. The purpose of our research was to determine the specific mechanism underlying the adverse effects of IN and indirubin. By tracking the modifications in guinea pigs after the intragastric administration of indirubin for 28 days. The results demonstrate that indirubin could accelerate bowel movements and decrease intestinal acetylcholinesterase (AchE) expression. Experiments with NCM460 cells revealed that indirubin significantly reduced the expression of AchE, and the AchE levels were increased after the silencing of AhR and re-exposure to indirubin. This study showed that the inhibition of AchE expression by indirubin plays a key role in the occurrence of adverse reactions to indirubin and that the underlying mechanism is related to AhR-mediated AchE downregulation.

Exploration of treatment-free remission in CML, based on molecular monitoring.

Typical chronic myelogenous leukemia (CML) is a myeloproliferative neoplasm caused by t(9; 22)(q34; q11) translocation. This chromosomal translocation forms the BCR::ABL1 fusion gene. The tyrosine kinase encoded by the BCR::ABL1 is considered to be the main pathogenic diver. BCR::ABL1 is not only a therapeutic target, but also a monitoring target. Monitoring of BCR::ABL1 reveals the progression of the disease and guides the next treatment. Now for CML, the target of treatment has been focused on treatment-free remission (TFR). We conducted a literature review of current developments of treatment-free remission and molecular monitoring methods. More effective and sensitive CML monitoring methods such as digital droplet PCR (ddPCR) and next generation sequencing (NGS) have further studied the measurable residual disease (MRD) and clonal heterogeneity, which provides strong support for the exploration of TFR. We discussed some of the factors that may be related to TFR outcomes at the molecular level, along with some monitoring strategies. Currently, predictive indicators for treatment-free remission outcomes and recurrence are lacking in clinical practice. In future, treatment-free remission research should focus on combining the clinical indicators with molecular monitoring and biological markers to personalize patient conditions and guide clinicians to develop individualized treatment plans, so that more patients with CML can achieve safer and stabler treatment-free remission.

Rapid Progression of Cunninghamella Species Leading to Respiratory Compromise

Abstract Cunninghamella spp are a group of filamentous fungi commonly found in soil and decaying matter and can cause infections in immunocompromised individuals, especially those undergoing chemotherapy or with hematologic malignancies. These infections can lead to a rapidly progressive and fatal outcome. Despite accounting for less than 10% of documented mucormycosis cases, disseminated Cunninghamella infections have a higher mortality rate when compared with other mucormycosis. We present the case of a patient with chronic myelogenous leukemia and myelodysplastic syndromes/myeloproliferative neoplasms overlap, receiving azacitidine, who initially presented with a diabetic foot ulcer infested with maggots. The patient rapidly developed respiratory distress and encephalopathy, with imaging revealing consolidation in the right upper lung lobe infected with Cunninghamella spp. Treatment with amphotericin B did not improve the patient's condition. Brain imaging also indicated a 24.4 × 16.9-mm lesion, and given the patient's comorbidities and disease progression, surgical intervention was not feasible. The patient was subsequently transitioned to comfort care.

An Attempt to Determine Hematological Malignancies in Selected Patients: A Cytogenetical Approach

Diagnosis and treatment of hematological malignancies, a diverse category of tumors that begin in the blood and bone marrow, are extremely difficult. Our knowledge of these conditions has been revolutionized by the development of cytogenetics, the study of chromosomes and genetic abnormalities. A total of 180 patients with benign and malignant hematological malignancy had peripheral bone marrow or blood samples obtained using the standard G-banding procedure. Fifty-one percent of patients had normal karyotypes. In addition, thirty individuals (15%) had a complicated karyotype whereas eighty-five percent (85%) had a normal one. Three-hundred and three percent of patients were diagnosed with Pre-B Acute Lymphoblastic Leukemia (Pre-B ALL), followed by twenty percent with Chronic Myelogenous Leukemia (CML), and fourteen percent with Acute Lymphocytic Leukemia.

Unsymmetrical Pd(II) Pincer Complexes with Benzothiazole and Thiocarbamate Flanking Units: Expedient Solvent-Free Synthesis and Anticancer Potential.

Driven by the growing threat of cancer, many research efforts are directed at developing new chemotherapeutic agents, where the central role is played by transition metal complexes. The proper ligand design serves as a key factor to unlock the anticancer potential of a particular metal center. Following a recent trend, we have prepared unsymmetrical pincer ligands that combine benzothiazole and thiocarbamate donor groups. These compounds are shown to readily undergo direct cyclopalladation, affording the target S,C,N-type Pd(II) pincer complexes both in solution and in the absence of a solvent. The solid-phase strategy provided the complexes in an efficient and ecologically friendly manner. The resulting palladacycles are fully characterized using nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy and, in one case, by single-crystal X-ray diffraction (XRD). The solvent-free reactions are additionally analyzed by powder XRD. The pincer complexes exhibit remarkable cytotoxicity against several solid and blood cancer cell lines, including human colorectal carcinoma (HCT116), breast cancer (MCF7), prostate adenocarcinoma (PC3), chronic myelogenous leukemia (K562), multiple plasmacytoma (AMO1), and acute lymphoblastic leukemia (H9), with the dimethylamino-substituted derivative being particularly effective. The latter also induced an appreciable level of apoptosis in both parental and doxorubicin-resistant cells K562 and K562/iS9, vindicating the high anticancer potential of this type of palladacycles.

Bosutinib: Pediatric First Approval.

Bosutinib (BOSULIF®), an orally administered BCR-ABL tyrosine kinase inhibitor (TKI) developed by Pfizer Inc., is well established in the EU and the USA as a treatment for adults with newly diagnosed (ND) chronic phase (CP) Philadelphia chromosome-positive (Ph+) chronic myelogenous leukemia (CML), and for CP, accelerated phase and blast phase Ph+ CML that is resistant or intolerant (R/I) to prior therapy. In September 2023, based on clinical data from patients aged ≥ 1to < 18years, bosutinib was approved in the USA for the treatment of pediatric patients aged ≥ 1year with CP Ph+ CML that is ND or R/I to prior therapy. This article summarizes the milestones in the development of bosutinib leading to this first pediatric approval.

Precision Isolation of Circulating Leukemia Cells in Chronic Myelogenous Leukemia Patients Using a Novel Microfluidic Device and Its Clinical Applications

Chronic Myelogenous Leukemia (CML) is a prevalent hematologic malignancy characterized by the malignant transformation of myeloid cells and their proliferation in the peripheral blood. The management of CML poses significant challenges, particularly in detecting and eradicating minimal residual disease, which is crucial for preventing relapse and improving survival outcomes. Traditional minimal residual disease detection methods, such as bone marrow aspiration, are invasive and have limitations which include the potential for sampling errors and false negatives. This study introduces a novel label-free microfluidic chip designed for the segregation and recovery of circulating leukemia cells, offering a non-invasive liquid biopsy approach with potential applications in precision medicine. Over July 2021 to October 2023, we recruited 56 CML patients across various disease stages and collected blood samples for analysis using our microfluidic device. The device demonstrated high efficacy in isolating circulating leukemia cells, with an optimal capture efficiency of 78% at a sample flow rate of 3 mL/h. Our results indicate that the microfluidic device can efficiently segregate and quantify circulating leukemia cells, providing a detailed understanding of CML progression and treatment response. The significant reduction in circulating leukemia cell counts in patients in complete remission highlights the device’s potential in monitoring treatment efficacy. Furthermore, the device’s sensitivity in detecting minimal residual disease could offer a more reliable prognostic tool for therapeutic decision-making in CML management.

Three cases of uncommon medication‐associated osteonecrosis of temporal bone

AbstractIntroductionMedication‐related osteonecrosis of the temporal bone is rare and has been reported to be associated with the use of anti‐resorptive and biologic agents. Here, we present the first case of tyrosine‐kinase inhibitor‐related external auditory canal (EAC) osteonecrosis as well as two cases related to anti‐resorptive therapies.MethodsA retrospective case series.ResultsCase one: an 84‐year‐old female presented with chronic otitis externa and osteonecrosis of EACs bilaterally. She had a history of osteoporosis treated with denosumab and risedronic acid. She successfully underwent left EAC reconstruction using an inferiorly‐based pedicle periosteal flap while the right ear canal was managed conservatively. Case two: a 69‐year‐old male presented with osteonecrosis of the right EAC. He had a history of osteoporosis treated with alendronic acid and zoledronic acid. His osteonecrosis is conservatively managed with local debridement and antibiotic application. Case three: a 60‐year‐old male presented with osteonecrosis of the right inferior EAC. He had a history of chronic myelogenous leukemia treated with a tyrosine‐kinase inhibitor, imatinib. After failing conservative therapy, he underwent right ear canal reconstruction using a periosteal vascular pedicle flap without complication and experienced complete resolution to his symptoms.ConclusionAnti‐resorptive agents and/or tyrosine kinase inhibitors may lead to dysregulation of bone remodeling and result in rare cases of temporal bone osteonecrosis. When a local debridement and antibiotic therapy fail, definitive surgical excision of necrotic bone with subsequent reconstruction of the EAC may offer patients a possible resolution in symptoms.

Interleukin-9 production by type 2 innate lymphoid cells induces Paneth cell metaplasia and small intestinal remodeling

Paneth cell metaplasia (PCM) typically arises in pre-existing gastrointestinal (GI) diseases; however, the mechanistic pathway that induces metaplasia and whether PCM is initiated exclusively by disorders intrinsic to the GI tract is not well known. Here, we describe the development of PCM in a murine model of chronic myelogenous leukemia (CML) that is driven by an inducible bcr-abl oncogene. Mechanistically, CML induces a proinflammatory state within the GI tract that results in the production of epithelial-derived IL-33. The binding of IL-33 to the decoy receptor ST2 leads to IL-9 production by type 2 innate lymphoid cells (ILC2) which is directly responsible for the induction of PCM in the colon and tissue remodeling in the small intestines, characterized by goblet and tuft cell hyperplasia along with expansion of mucosal mast cells. Thus, we demonstrate that an extra-intestinal disease can trigger an ILC2/IL-9 immune circuit, which induces PCM and regulates epithelial cell fate decisions in the GI tract.