Pancreatic acinar cell carcinoma (PACC) is a rare exocrine tumor of the pancreas with distinct clinical and pathological features. In recent years, advancements in molecular biology techniques have led to a deeper understanding of the molecular mechanisms underlying PACC. Progress in imaging, endoscopic, and molecular diagnostic technologies has improved the early detection rate of PACC. The primary treatment modalities for PACC include surgical resection, chemotherapy, targeted therapy and immunotherapy; however, the therapeutic efficacy still requires further improvement. This article reviews the current research status of PACC, covering its epidemiology, pathological characteristics, molecular alterations, diagnostic methods, and treatment strategies, and discusses the controversies and future directions in PACC research.

Natural products are essential sources of antitumor drugs. One such molecule, β-elemene, is a potent antitumor compound extracted from Curcuma wenyujin. In the present investigation, a series of novel 13,14-disubstituted nitric oxide (NO)-donor β-elemene derivatives were designed, with β-elemene as the foundational compound, and subsequently synthesized to evaluate their therapeutic potential against leukemia. Notably, the derivative labeled as compound 13d demonstrated a potent anti-proliferative activity against the K562 cell line, with a high NO release. In vivo studies indicated that compound 13d could effectively inhibit tumor growth, exhibiting no discernible toxic manifestations. Specifically, a significant tumor growth inhibition rate of 62.9% was observed in the K562 xenograft tumor mouse model. The accumulated data propound the potential therapeutic application of compound 13d in the management of leukemia.
Humans ; Mice ; Animals ; Cell Line, Tumor ; Nitric Oxide Donors/pharmacology* ; Sesquiterpenes/pharmacology* ; Leukemia/drug therapy* ; Biological Assay ; Cell Proliferation

Motor imagery (MI) is an important paradigm of driving brain computer interface (BCI). However, MI is not easy to control or acquire, and the performance of MI-BCI depends heavily on the performance of the subjects' MI. Therefore, the correct execution of MI mental activities, ability evaluation and improvement methods play important and even critical roles in the improvement and application of MI-BCI system's performance. However, in the research and development of MI-BCI, the existing researches mainly focus on the decoding algorithm of MI, but do not pay enough attention to the above three aspects of MI mental activities. In this paper, these problems of MI-BCI are discussed in detail, and it is pointed out that the subjects tend to use visual motor imagery as kinesthetic motor imagery. In the future, we need to develop some objective, quantitatively visualized MI ability evaluation methods, and develop some effective and less time-consumption training methods to improve MI ability. It is also necessary to solve the differences and commonness of MI problems between and within individuals and MI-BCI illiteracy to a certain extent.
Algorithms ; Brain-Computer Interfaces ; Electroencephalography ; Humans ; Imagery, Psychotherapy ; Imagination

Objective Sex difference of the length ratios of metacarpals and metatarsals in Macaca mulatta from the Taihang mountains was studied in our laboratory. Methods The lengths of 27 metacarpals (10 males, 17 females) and 30 metatarsals(12 males, 18 females) were measured from the skeletons of 30 adult Macaca mulatta. Length ratios were constructed for all possible pairings of the five bones in each individual hand and foot. One-Way ANOVA adopting SPSS13.0 for windows was used to study the sex differences of length ratios of metacarpals and metatarsals. Results For Macaca mulatta, several of these lengths ratios exhibited substantial differences between the sexes. The metacarpal(Mc) length ratios showing the largest sex differences were 2Mc∶5Mc and 4Mc∶5Mc in both hands (P<0.01), and the metatarsal(Mt) length ratios showing the largest sex difference was 1Mt:3Mt in both feet (P<0.05). Conclusion The sex differences of metacarpals and metatarsals remained when specimens of similar size were compared. It showed that body size was not the basis for these sex differences. Various facts suggested that the sex difference of length ratios in primate metapodials was associated with sex hormones exposure, possibly during prenatal development.