Clinical characteristics and progression risk factors for patients with monoclonal gammopathy of undetermined significance / 中华血液学杂志

Objective: To analyze the clinical presentation and progression risk factors of patients with monoclonal gammopathy of undetermined significance (MGUS) in China. Methods: We retrospectively assessed the clinical features and disease progression of 1 037 patients with monoclonal gammopathy of undetermined significance between January 2004 and January 2022 at Peking Union Medical College Hospital. Results: A total of 1 037 patients were recruited in the study, including 636 males (63.6%) , with a median age of 58 (18-94) years. The median concentration of serum monoclonal protein was 2.7 (0-29.4) g/L. The monoclonal immunoglobulin type was IgG in 380 patients (59.7%) , IgA in 143 patients (22.5%) , IgM in 103 patients (16.2%) , IgD in 4 patients (0.6%) , and light chain in 6 patients (0.9%) . 171 patients (31.9%) had an abnormal serum-free light chain ratio (sFLCr) . According to the Mayo Clinic model for risk of progression, the proportion of patients in the low-risk, medium-low-risk, medium-high risk, and high-risk groups were 254 (59.5%) , 126 (29.5%) , 43 (10.1%) , and 4 (0.9%) , respectively. With a median follow-up of 47 (1-204) months, 34 of 795 patients (4.3%) had disease progression, and 22 (2.8%) died. The overall progression rate was 1.06 (0.99-1.13) /100 person-years. Patients with non-IgM MGUS have a markedly higher disease progression rate per 100 person-years than IgM-MGUS (2.87/100 person-years vs 0.99/100 person-years, P=0.002) . The disease progression rate per 100 person-years in non-IgM-MGUS patients of Mayo classification low-risk, medium-low risk and medium-high risk groups were 0.32 (0.25-0.39) /100 person-years, 1.82 (1.55-2.09) /100 person-years, and2.71 (1.93-3.49) /100 person-years, which had statistically difference (P=0.005) . Conclusion: In comparison to non-IgM-MGUS, IgM-MGUS has a greater risk of disease progression. The Mayo Clinic progression risk model applies to non-IgM-MGUS patients in China.

Efficacy and safety of daratumumab in the treatment of advanced light chain amyloidosis / 中华血液学杂志

Objective: The study investigated the efficacy and safety of daratumumab in the treatment of cardiac light chain (AL) amyloidosis. Methods: We retrospectively analyzed the clinical characteristics, hematologic response, organ response, long-term survival, and adverse events of 20 patients with newly diagnosed or relapsed/refractory cardiac AL amyloidosis treated with daratumumab in Peking Union Medical College Hospitalo from January 2017 to March 2021. Results: The overall median age of 20 patients was 62 (range, 45-73) yeas, with a male to female ratio of 2.3:1. Nine patients were newly diagnosed, while 11 patients had relapsed or refractory disease. Based on Mayo 2004 cardiac AL staging system, stages Ⅱ and Ⅲ diseases were present in 20 patients respectively. Four patients died during the first cycle of daratumumab, and the remaining 16 patients completed a median of 3 (range, 1-10) cycles of treatment. Overall hematologic response rates were 80% each at 1, 3, and 6 months after treatment initiation, and 45% , 60% , and 60% of the patients achieved at least a very good partial response at 1, 3, and 6 months respectively. The median duration to hematologic response was 13 (range, 6-28) days. At 3, 6, and 12 months, 20% , 30% , and 40% of the patients respectively achieved a cardiac response, and the median days to response was 91 (range, 30-216) days. As of the last follow-up, 9 (45% ) patients died. The 1-month mortality rate of all the patients and stage IIIb patients was 25% and 40% , respectively. The 1-year overall survival rate was 48.4% . Lymphocytopenia was the most common hematological adverse event (above grade 3) . Non-hematological adverse events were mainly infusion-related reactions and infections. Conclusion: Daratumumab could induce deep and rapid hematologic response in newly diagnosed and previously treated cardiac AL amyloidosis patients. However, daratumumab was not effective in preventing the high and early mortality rate in stage Ⅲb patients.

Lignans with NO inhibitory activity from Tinospora sinensis / 中国天然药物

Two new lignan glucosides, tinsinlignans A and B (1 and 2), two new oxyneolignans, tinsinlignans C and D (3 and 4), along with one known analogue (5), were isolated from the stems of Tinospora sinensis. The structures of the new compounds were elucidated based on analysis of spectroscopic data, and the absolute configuration of 1 was determined through electronic circular dichroism (ECD) calculation based on the time-dependent density functional theory (TD-DFT). Compounds 1-4 were evaluated for their inhibitory effects on nitric oxide (NO) production induced by lipopolysaccharide (LPS) in murine RAW264.7 macrophage cells and compounds 1 and 2 exhibited moderate inhibitory activities with IC

Clinical Analysis of Unicentric Castleman's Disease with Paraneoplastic Pemphigus and Bronchiolitis Obliterans / 中国医学科学院学报

Objective To investigate the clinical features of unicentric Castleman's disease(UCD)with paraneoplastic pemphigus(PNP)and bronchiolitis obliterans(BO).Method Data of UCD patients with PNP and BO from Peking Union Medical College Hospital were retrospectively analyzed,along with literatures review. Results Totally 23 cases(11 males and 12 females)were enrolled.The median age was 31 years(13-56 years).The most common pathological type was hyaline-vascular variant(91.4%),and most tumors located in abdominopelvic cavity(69.6%).Considerable cases presented bulky masses(26.3%).Most cases were first diagnosed on presentation with the symtoms of PNP(90.0%).BO was characterized by progressive dyspnea after excision of CD lesions.The average follow-up duration was 27.5 months(1-135 months).The median overall survival time was 36.0 months(95% CI=13.9-58.1).Respiratory failure was the dominant cause of death(91.7%).Conclusions PNP should be considered among those patients with specific oral or cutaneous lesions.Earlier diagnosis and treatment of latent UCD are important for reducing complications and deaths.

Significances of MYD88and CXCR4Mutations in Waldenstrom Macroglobulinemia / 中国医学科学院学报

Waldenstrom macroglobulinemia(WM) is a lymphoplasmacytic lymphoma characterized by serum monoclonal IgM immunoglobulin.Recently,the high mutation rates of MYD88and CXCR4have been documented in WM.Furthermore,MYD88and CXCR4are related to the response to target drugs.This article reviews the significances of MYD88and CXCR4in the diagnosis and treatment of WM.

Clinical Features of Patients with Castleman's Disease Complicated Systemic Lupus Erythematosus / 中国医学科学院学报

Objective To investigate the clinical features of patients with Castleman's disease (CD) and systemic lupus erythematosus (SLE). Methods According to the diagnostic information between 1994 to 2014 extracted from the database of the Medical Record Department of Peking Union Medical College Hospital (PUMCH),patients with CD and SLE were included. A thorough literature review utilizing the key words of "Castleman's disease","systemic lupus erythematosus","SLE",and "lupus" was performed in PubMed during the same period. Cases with detailed clinical information were included while cases without detailed information were excluded from the analysis of this study. Results Nine patients worldwide were available for analysis [2 cases from PUMCH,accounted for 0.03%(2/6502) of all patients diagnosed as SLE and 1.0% (2/100) of patients diagnosed as CD during the same period] with a male-to-female ratio of2:7. The median age at diagnosis of CD was 39.0 years (range:21- 60 years). All patients were diagnosed as multicentric CD with generalized peripheral lymphadenopathy. Pathologic examination showed a balanced distribution:plasma cell variant:hyaline-vascular variant:mixed variant=3:3:3. Fever was the most common symptom (88.9%,8/9). Blood system was the most commonly involved system (88.9%,8/9) and kidneys were the most commonly involved organ (88.9%,8/9). Autoimmune thrombocytopenia (AITP) was observed in 55.6% (5/9) of patients,which was significantly higher than the general SLE patients (15.0%) (P<0.01). None of the 9 patients had evidence of central nervous system involvement. Conclusions CD complicated by SLE is a rare clinical condition. Compared to the general SLE population,this subgroup of patients may have higher rate of AITP and lower rate of central nervous system involvement.

Selection of Biopsy Site for Patients with Systematic Amyloidosis / 中国医学科学院学报

Objective To evaluate the sensitivities of various biopsy methods for the diagnosis of systematic amyloidosis (SA). Methods The clinical data and biopsy results of 194 SA patients who were treated in Peking Union Medical College Hospital from January 2009 to June 2015 were retrospectively analyzed. Results The highest sensitivity was achieved by biopsy of affected organs,with renal biopsy 97.4%,heart biopsy 95.0% and liver biopsy 87.5%. Among non-invasive biopsy methods,tongue biopsy was found to be 75% sensitive,followed by gingiva biopsy at 57%,abdominal fat pad aspiration at 57%,rectum biopsy at 16%,and bone marrow examination at 8%. Combination of tongue and abdominal fat pad biopsy yielded a detection rate of 93.1%. Conclusions Biopsy of the involved organ has the highest sensitivity. However,combination of multiple non-invasive biopsy methods may has sensitivity comparable to organ biopsy and is safer and more convenient.

Interaction between tumor-associated macrophages (TAMs) and HUT-78 lymphoma cells / 中国实验血液学杂志

This study was aimed to explore the effects of lymphoma cells on the differentiation of monocytes from peripheral blood to tumor-associated macrophages (TAM) and the effect of TAM on proliferation of lymphoma cells in vitro, and investigate the difference between newly diagnosed lymphoma patients and healthy volunteers. Blood samples were obtained from 15 newly diagnosed lymphoma patients and 8 healthy volunteers. Monocytes from peripheral blood were isolated by Ficoll- Hypaque density gradient centrifugation and CD14 immuno-magnetic beads. Then monocytes were directly co-cultured with HUT-78 lymphoma cells by using Transwell apparatus in vitro. Expression of the markers of TAM (CD68 and CD163) were detected by flow cytometry to analyse the proportion of differentiated TAM. Growth curve of HUT-78 cells was made by direct cell count. The IL-10 and VEGF levels in the co-culture system were detected by ELISA. The detection results of newly diagnosed lymphoma patients were compared with that of healthy controls. The results showed that the proportion of CD68(+), CD163(+) and CD68+CD163 (+) cells were significantly up-regulated after co-cultured with HUT-78 lymphoma cells in both patients and healthy controls (P < 0.05). There was no statistical significance in the increasing degree between patients and healthy controls. TAM differentiated from peripheral blood monocytes showed no significant promotion or inhibition on the growth of co-cultured lymphoma cells. For patients, the IL-10 and VEGF levels in the co-culture group were significantly lower than those in two single culture groups (P < 0.05) . For healthy controls, there was no significant difference between these two. It is concluded that lymphoma cells can promote the differentiation of monocytes to macrophages with M2-like phenotype. There is no difference in the promoting degree between patients and healthy controls. TAM differentiated from patients' monocytes significantly down-regulate levels of IL-10 and VEGF in the co-culture system, exhibited functions more like M1 macrophages. In contrast, TAM differentiated from monocytes of healthy controls show no such effects on the co-culture system.

Porcine MSC-derived CLC induced by rabbit's cardiomyocytes extract did not induce immune reaction in vivo / 中华心血管病杂志

<p><b>OBJECTIVE</b>To compare the in vivo immune reaction of transplanting porcine MSC-derived CLC with rabbit cardiomyocytes extracts induced differentiation or in vitro cultured porcine MSC.</p><p><b>METHODS</b>After injecting the MSC-derived CLC or MSC to the original porcines, the number of CD4+, CD8+ T cells were determined by flow cytometry. The serum concentrations of IL-2, IL-4 were measured by ELISA, and the porcine spleen lymphocyte CTL cytotoxicity was determined by Cell Counting Kit-8 Assay.</p><p><b>RESULTS</b>The numbers of CD4+ and CD8+ T cells, the serum concentrations of IL-2, IL-4 and spleen lymphocyte CTL cytotoxicity were all similar in porcines received MSC-derived CLC induced by rabbit's CMs extract or MSC transplantation.</p><p><b>CONCLUSION</b>The porcine MSC-derived CLC induced by rabbit's CMs extract did not induce extra immune reaction when injected back to the original porcine.</p>